US20110154788A1 - Apparatus for backwashing filter - Google Patents

Apparatus for backwashing filter Download PDF

Info

Publication number
US20110154788A1
US20110154788A1 US13/003,722 US200913003722A US2011154788A1 US 20110154788 A1 US20110154788 A1 US 20110154788A1 US 200913003722 A US200913003722 A US 200913003722A US 2011154788 A1 US2011154788 A1 US 2011154788A1
Authority
US
United States
Prior art keywords
backwashing
valve
filter
gas
fully
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/003,722
Inventor
Yoshinori Koyama
Osamu Shinada
Yuichiro Kitagawa
Takao Hashimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD. reassignment MITSUBISHI HEAVY INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HASHIMOTO, TAKAO, KITAGAWA, YUICHIRO, KOYAMA, YOSHINORI, SHINADA, OSAMU
Publication of US20110154788A1 publication Critical patent/US20110154788A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/02—Dust removal
    • C10K1/024—Dust removal by filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
    • B01D46/715—Using pressurized gas at supersonic velocities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • C10J3/82—Gas withdrawal means
    • C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/02—Dust removal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
    • F02C3/26—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being solid or pulverulent, e.g. in slurry or suspension
    • F02C3/28—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being solid or pulverulent, e.g. in slurry or suspension using a separate gas producer for gasifying the fuel before combustion
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/164—Integration of gasification processes with another plant or parts within the plant with conversion of synthesis gas
    • C10J2300/1643—Conversion of synthesis gas to energy
    • C10J2300/1653—Conversion of synthesis gas to energy integrated in a gasification combined cycle [IGCC]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]

Definitions

  • the present invention relates to an apparatus for backwashing filter (dust removal device) that mainly uses a filter element formed of a porous material to remove dust from gases containing dust.
  • a known apparatus for backwashing filter is, for example, disclosed in Patent Literature 1.
  • a first backwashing valve backwashing-gas front valve
  • a second backwashing valve backwashing-gas rear valve
  • the present invention has been made in view of the above-described circumstances, and an object thereof is to provide an apparatus for backwashing filter that is capable of ensuring the reliability of backwashing valves constituted of a first backwashing valves and a second backwashing valves.
  • the present invention employs the following solutions.
  • An apparatus for backwashing filter is an apparatus for backwashing filter in a dust removal device using porous material, having a plurality of filter blocks which are constituted of a plurality of filter elements accommodated in a pressure vessel and partitioning plates that partition or support these filter blocks, the pressure vessel being internally divided into a space for dust-containing gas, which includes a dust hopper, and a plurality of spaces for purified gas; in an apparatus for backwashing filter that periodically performs backwashing of the filter elements for each of the filter blocks, wherein a backwashing nozzle directed toward the filter elements is provided inside purified-gas lead-out pipes or inside spaces upstream thereof, each of which is connected to the plurality of spaces for the purified gas or a filter-element outlet, a first backwashing valve that controls gas for backwashing and a second backwashing valve that operates at slower speed than the first backwashing valve are disposed, in two series, at backwashing-gas introducing pipes individually provided for each of the filter blocks.
  • the second backwashing valve upon starting a backwashing cycle, first, the second backwashing valve slowly moves from a fully-closed position to a fully-open position over a predetermined period of time. At this time, the first backwashing valve does not move, remaining in the fully-closed position (maintains the fully-closed position).
  • the first backwashing valve quickly moves from the fully-closed position to the fully-open position over an extremely short period of time, and thus, the second backwashing valve and the first backwashing valve are in the fully-open positions and the backwashing is performed for an extremely short period of time.
  • the first backwashing valve quickly moves from the fully-open position to the fully-closed position over an extremely short period of time. At this time, the second backwashing valve does not move, remaining in the fully-open position (maintains the fully-open position).
  • the first backwashing valve reaches the fully-closed position and a predetermined period of time has passed, the second backwashing valve slowly moves from the fully-open position to the fully-closed position over a predetermined period of time, and the second backwashing valve reaches the fully-closed position, thus ending the backwashing cycle.
  • the second backwashing valve begins to move again from the fully-closed position to the fully-opened position, thus starting the next backwashing cycle.
  • An apparatus for backwashing filter is an apparatus for backwashing filter in a dust removal device using porous material, having a plurality of filter blocks which are constituted of a plurality of filter elements accommodated in a pressure vessel and partitioning plates that partition or support these filter blocks, the pressure vessel being internally divided into a space for dust-containing gas, which includes a dust hopper, and a plurality of spaces for purified gas; in an apparatus for backwashing filter that periodically performs backwashing of the filter elements for each of the filter blocks, wherein a backwashing nozzle directed toward the filter elements is provided inside purified-gas lead-out pipes or inside spaces upstream thereof, each of which is connected to the plurality of spaces for the purified gas or a filter-element outlet, a first backwashing valve and a second backwashing valve are disposed, in two series, at backwashing-gas introducing pipes individually provided for each of the filter blocks, and gas for backwashing is controlled by the first backwashing valve alone.
  • the second backwashing valve upon starting a backwashing cycle, quickly moves from the fully-closed position to the fully-open position over an extremely short period of time, and the second backwashing valve reaches the fully-open position, thus performing the backwashing for an extremely short period of time.
  • the second backwashing valve quickly moves from the fully-open position to the fully-closed position over the extremely short period of time, thus ending the backwashing cycle.
  • the second backwashing valve begins to move again from the fully-closed position to the fully-open position, thus starting the next backwashing cycle.
  • the first backwashing valve does not move, remaining in the fully-closed position (maintains the fully-closed position).
  • An integrated coal gasification combined cycle (IGCC) system is equipped with an apparatus for backwashing filter that is capable of reducing the deterioration of the rotation shaft, the bearing, the valve piece, etc., of the second backwashing valve; that is capable of, even when there is considerable deterioration in the rotation shaft, the bearing, the valve piece, etc., of the first backwashing valve, completely blocking the channel to which the first backwashing valve and the second backwashing valve are connected by having the second backwashing valve in the fully-closed position; and that is capable of ensuring the reliability of a backwashing valve constituted of the first backwashing valve and the second backwashing valve.
  • the present invention affords an advantage in that it is possible to ensure the reliability of a backwashing valve constituted of a first backwashing valve and a second backwashing valve.
  • FIG. 1 is a diagram of a gas system in an apparatus for backwashing filter for pressurized-fluidized-bed combustion boilers according to the present invention.
  • FIG. 2 is an explanatory diagram for a sequence of associated operations between backwashing-gas front and rear valves according to an embodiment of the present invention.
  • FIG. 3 is an explanatory diagram for a sequence of associated operations between backwashing-gas front and rear valves according to another embodiment of the present invention.
  • FIG. 4 is a diagram showing another embodiment of the present invention and is a diagram showing a gas system around a pressure vessel.
  • FIG. 1 An embodiment of the present invention will be described below using the diagram of a backwashing-gas system in an apparatus for backwashing filter for a pressurized-fluidized-bed combustion boiler shown in FIG. 1 and the explanatory diagram for the sequence of associated operations between backwashing-gas front and rear valves shown in FIG. 2 .
  • a total of four blocks are provided as filter blocks, two of which are in a honeycomb-type element (filter element) 2 at a top portion of a pressure vessel 1 and two of which are in a cylinder-type element (filter element) 3 at a bottom portion. Consequently, a backwashing-gas system 4 is divided into four subsystems and, in each system, a number of backwashing nozzles 5 required for the corresponding block is provided, and a set of backwashing valves constituted of a backwashing-gas front valve (second backwashing valve) 6 , a backwashing-gas rear valve (first backwashing valve) 7 , and a manual bypass valve 8 is provided on the upstream side of the backwashing nozzle 5 .
  • a backwashing-gas buffer tank 9 is provided upstream of the backwashing-gas system 4 , and, in addition, each pressurized-fluidized-bed-combustion boiler filter is connected to the backwashing-gas buffer tank 9 via a pipe 10 .
  • Two high-pressure gas compressors 11 are provided upstream of the backwashing-gas buffer tank 9 and, of these two compressors, one compressor is used as an auxiliary unit.
  • the thus-configured backwashing-gas system 4 is operated as follows. That is, regarding high-temperature dust-containing gas that has entered from a dust-containing gas inlet 12 disposed at the top portion of the pressure vessel 1 of the pressurized-fluidized-bed-combustion boiler filter, one part thereof is subjected to dust removal in the two filter blocks at the top portion, which are configured of the porous-material honeycomb-type elements 2 , and the remaining high-temperature dust-containing gas is subjected to dust removal in the two filter blocks formed of the cylinder-type elements 3 divided by a top-portion partitioning pipe plate (partitioning plate) 13 , bottom-portion partitioning pipe plate (partitioning plate) 14 , and inner-cylinder/outer-cylinder partitioning plate that are disposed at the bottom portion.
  • Purified gas that has passed through individual elements is removed to the outside via corresponding purified-gas lead-out pipes 15 and, after being combined, moves toward a gas turbine disposed downstream thereof. Dust that has been removed by each filter block drops to a dust hopper disposed at the bottom portion on the high-temperature dust-containing gas side and is discharged from a dust hopper outlet 16 .
  • dust adhered to the high-temperature dust-containing gas side of each element does not necessarily drop off naturally, and it is necessary to cause a gas flow in a direction opposite to a normal flow, that is, to increase a gas pressure by applying a pressure wave of high-pressure gas in the opposite direction for an extremely short period of time (for example, 0.5 second) to shake off the dust adhered on the high-temperature dust-containing gas side, i.e., to perform backwashing.
  • This backwashing is usually performed cyclically block by block in turn, and backwashing intervals are designed to be about several minutes.
  • the backwashing-gas front valve 6 slowly moves from a fully-closed position to a fully-open position over a predetermined period of time (for example, 2 to 10 seconds). At this time, the backwashing-gas rear valve 7 does not move, remaining in the fully-closed position (maintains the fully-closed position).
  • the backwashing-gas rear valve 7 quickly moves from the fully-closed position to the fully-open position over an extremely short period of time (for example, 0.1 to 1 second), and thus, the backwashing-gas front valve 6 and the backwashing-gas rear valve 7 are in the fully-open positions, and the backwashing is performed for an extremely short period of time (for example, 0.1 to 1 second).
  • the backwashing-gas rear valve 7 quickly moves from the fully-open position to the fully-closed position over an extremely short period of time (for example, 0.1 to 1 second).
  • the backwashing-gas front valve 6 does not move, remaining in the fully-open position (maintains the fully-open position).
  • a predetermined period of time for example, 1 to 2 seconds
  • the backwashing-gas front valve 6 slowly moves from the fully-open position to the fully-closed position over a predetermined period of time (for example, 2 to 10 seconds), and the backwashing-gas front valve 6 reaches the fully-closed position, thus ending the backwashing cycle.
  • a predetermined period of time for example, 4 to 10 minutes
  • the apparatus for backwashing filter it is possible to reduce deterioration of a rotation shaft, a bearing, a valve piece, etc., of the backwashing-gas front valve 6 as compared with a conventional apparatus; even when there is considerable deterioration in a rotation shaft, a bearing, a valve piece, etc., of the backwashing-gas rear valve 7 , it is possible to completely block a channel to which the backwashing-gas front valve 6 and the backwashing-gas rear valve 7 are connected by having the backwashing-gas front valve 6 in the fully-closed position; and thus, it is possible to ensure the reliability of the backwashing valves constituted of the backwashing-gas front valves 6 and the backwashing-gas rear valves 7 .
  • this embodiment differs from the above-described first embodiment in that the backwashing-gas front valve 6 is constantly maintained in the fully-open position (except for when it needs to be moved to the fully-closed position).
  • the backwashing-gas rear valve 7 quickly moves from the fully-closed position to the fully-open position over an extremely short period of time (for example, 0.1 to 1 second), and the backwashing-gas rear valve 7 reaches the fully-closed position, thus performing backwashing for an extremely short period of time (for example, 0.1 to 1 second).
  • the backwashing-gas rear valve 7 quickly moves from the fully-open position to the fully-closed position over an extremely short period of time (for example, 0.1 to 1 second), thus ending the backwashing cycle.
  • a predetermined period of time for example, 4 to 10 minutes
  • the apparatus for backwashing filter it is possible to reduce deterioration of the rotation shaft, the bearing, the valve piece, etc., of the backwashing-gas front valve 6 as compared with the first embodiment; even when there is considerable deterioration in the rotation shaft, the bearing, the valve piece, etc., of the backwashing-gas rear valve 7 , it is possible to completely block the channel to which the backwashing-gas front valve 6 and the backwashing-gas rear valve 7 are connected, by having the backwashing-gas front valve 6 in the fully-closed position; and thus it is possible to ensure the reliability of the backwashing valves constituted of the backwashing-gas front valves 6 and the backwashing-gas rear valves 7 .
  • the application of the apparatus for backwashing filter according to the present invention is not limited to integrated coal gasification combined cycle systems equipped with the pressure vessel 1 shown in FIG. 1 ; it is also applicable to integrated coal gasification combined cycle systems equipped with a pressure vessel 21 shown in FIG. 4 .
  • reference signs 22 , 23 , and 24 in FIG. 4 denote a gas lead-out pipe, a cylinder-type element (candle-type filter element), and a top-portion partitioning plate (tube sheet), respectively.

Abstract

The reliability of backwashing valves constituted of first backwashing valves and second backwashing valves is ensured. A first backwashing valve (backwashing-gas rear valve) (7) that controls gas for backwashing and a second backwashing valve (backwashing-gas front valve) (6) that operates at slower speed than the first backwashing valve (7) are disposed, in a series including two or more thereof, at backwashing-gas introducing pipes individually provided for each of the filter blocks.

Description

    TECHNICAL FIELD
  • The present invention relates to an apparatus for backwashing filter (dust removal device) that mainly uses a filter element formed of a porous material to remove dust from gases containing dust.
    • BACKGROUND ART
  • A known apparatus for backwashing filter is, for example, disclosed in Patent Literature 1.
    • {Citation List} {Patent Literature} {PTL 1} The Publication of Japanese Patent No. 3197144. SUMMARY OF INVENTION Technical Problem
  • However, with the apparatus for backwashing filter disclosed in the above-described Patent Literature 1, a first backwashing valve (backwashing-gas front valve) and a second backwashing valve (backwashing-gas rear valve) are both configured so as to move quickly in an extremely short period of time (about 0.1 second) from a fully-closed position to a fully-open position, or from the fully-open position to the fully-closed position. Consequently, as the number of opening/closing operations increases, rotation shafts, bearings, valve bodies, etc., of the first backwashing valve and second backwashing valve become deteriorated, making it impossible to completely block channels connected to the first backwashing valve and second backwashing valve, resulting in the problem of difficulties in ensuring reliability of backwashing valves constituted of the first backwashing valve and the second backwashing valve.
  • The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an apparatus for backwashing filter that is capable of ensuring the reliability of backwashing valves constituted of a first backwashing valves and a second backwashing valves.
    • Solution to Problem
  • In order to solve the above-described problems, the present invention employs the following solutions.
  • An apparatus for backwashing filter according to a first aspect of the present invention is an apparatus for backwashing filter in a dust removal device using porous material, having a plurality of filter blocks which are constituted of a plurality of filter elements accommodated in a pressure vessel and partitioning plates that partition or support these filter blocks, the pressure vessel being internally divided into a space for dust-containing gas, which includes a dust hopper, and a plurality of spaces for purified gas; in an apparatus for backwashing filter that periodically performs backwashing of the filter elements for each of the filter blocks, wherein a backwashing nozzle directed toward the filter elements is provided inside purified-gas lead-out pipes or inside spaces upstream thereof, each of which is connected to the plurality of spaces for the purified gas or a filter-element outlet, a first backwashing valve that controls gas for backwashing and a second backwashing valve that operates at slower speed than the first backwashing valve are disposed, in two series, at backwashing-gas introducing pipes individually provided for each of the filter blocks.
  • With the apparatus for backwashing filter according to the above-described first aspect, upon starting a backwashing cycle, first, the second backwashing valve slowly moves from a fully-closed position to a fully-open position over a predetermined period of time. At this time, the first backwashing valve does not move, remaining in the fully-closed position (maintains the fully-closed position). When the second backwashing valve reaches the fully-open position and a predetermined period of time has passed, the first backwashing valve quickly moves from the fully-closed position to the fully-open position over an extremely short period of time, and thus, the second backwashing valve and the first backwashing valve are in the fully-open positions and the backwashing is performed for an extremely short period of time. When the backwashing is completed, the first backwashing valve quickly moves from the fully-open position to the fully-closed position over an extremely short period of time. At this time, the second backwashing valve does not move, remaining in the fully-open position (maintains the fully-open position). When the first backwashing valve reaches the fully-closed position and a predetermined period of time has passed, the second backwashing valve slowly moves from the fully-open position to the fully-closed position over a predetermined period of time, and the second backwashing valve reaches the fully-closed position, thus ending the backwashing cycle. Then, when a predetermined period of time has passed, the second backwashing valve begins to move again from the fully-closed position to the fully-opened position, thus starting the next backwashing cycle.
  • Accordingly, it is possible to reduce deterioration of a rotation shaft, a bearing, a valve body, etc., of the second backwashing valve; even when there is considerable deterioration in a rotation shaft, a bearing, a valve body, etc., of the first backwashing valve, it is possible to completely block a channel to which the first backwashing valve and the second backwashing valve are connected by having the second backwashing valve in the fully-closed position; and thus, it is possible to ensure the reliability of a backwashing valve constituted of the first backwashing valve and the second backwashing valve.
  • An apparatus for backwashing filter according to a second aspect of the present invention is an apparatus for backwashing filter in a dust removal device using porous material, having a plurality of filter blocks which are constituted of a plurality of filter elements accommodated in a pressure vessel and partitioning plates that partition or support these filter blocks, the pressure vessel being internally divided into a space for dust-containing gas, which includes a dust hopper, and a plurality of spaces for purified gas; in an apparatus for backwashing filter that periodically performs backwashing of the filter elements for each of the filter blocks, wherein a backwashing nozzle directed toward the filter elements is provided inside purified-gas lead-out pipes or inside spaces upstream thereof, each of which is connected to the plurality of spaces for the purified gas or a filter-element outlet, a first backwashing valve and a second backwashing valve are disposed, in two series, at backwashing-gas introducing pipes individually provided for each of the filter blocks, and gas for backwashing is controlled by the first backwashing valve alone.
  • With the apparatus for backwashing filter according to the above-described second aspect, upon starting a backwashing cycle, the second backwashing valve quickly moves from the fully-closed position to the fully-open position over an extremely short period of time, and the second backwashing valve reaches the fully-open position, thus performing the backwashing for an extremely short period of time. When the backwashing is completed, the second backwashing valve quickly moves from the fully-open position to the fully-closed position over the extremely short period of time, thus ending the backwashing cycle. Then, when a predetermined period of time has passed, the second backwashing valve begins to move again from the fully-closed position to the fully-open position, thus starting the next backwashing cycle.
  • Note that, during a backwashing cycle and between one backwashing cycle and another backwashing cycle, the first backwashing valve does not move, remaining in the fully-closed position (maintains the fully-closed position).
  • Accordingly, it is possible to reduce deterioration of the rotation shaft, the bearing, the valve piece, etc., of the second backwashing valve; even when there is considerable deterioration in the rotation shaft, the bearing, the valve piece, etc., of the first backwashing valve, it is possible to completely block the channel to which the first backwashing valve and the second backwashing valve are connected, by having the second backwashing valve in the fully-closed position; and thus it is possible to ensure the reliability of a backwashing valves constituted of the first backwashing valve and the second backwashing valve.
  • An integrated coal gasification combined cycle (IGCC) system according to a third aspect of the present invention is equipped with an apparatus for backwashing filter that is capable of reducing the deterioration of the rotation shaft, the bearing, the valve piece, etc., of the second backwashing valve; that is capable of, even when there is considerable deterioration in the rotation shaft, the bearing, the valve piece, etc., of the first backwashing valve, completely blocking the channel to which the first backwashing valve and the second backwashing valve are connected by having the second backwashing valve in the fully-closed position; and that is capable of ensuring the reliability of a backwashing valve constituted of the first backwashing valve and the second backwashing valve.
  • With the integrated coal gasification combined cycle system according to the above-described third aspect, it is possible to ensure the reliability of a backwashing valve constituted of the first backwashing valve and the second backwashing valve, and thus, it is possible to improve the reliability of the system as a whole.
    • ADVANTAGEOUS EFFECTS OF INVENTION
  • The present invention affords an advantage in that it is possible to ensure the reliability of a backwashing valve constituted of a first backwashing valve and a second backwashing valve.
    • BRIEF DESCRIPTION OF DRAWINGS
  • FIG. 1 is a diagram of a gas system in an apparatus for backwashing filter for pressurized-fluidized-bed combustion boilers according to the present invention.
  • FIG. 2 is an explanatory diagram for a sequence of associated operations between backwashing-gas front and rear valves according to an embodiment of the present invention.
  • FIG. 3 is an explanatory diagram for a sequence of associated operations between backwashing-gas front and rear valves according to another embodiment of the present invention.
  • FIG. 4 is a diagram showing another embodiment of the present invention and is a diagram showing a gas system around a pressure vessel.
    •  DESCRIPTION OF EMBODIMENTS
  • An embodiment of the present invention will be described below using the diagram of a backwashing-gas system in an apparatus for backwashing filter for a pressurized-fluidized-bed combustion boiler shown in FIG. 1 and the explanatory diagram for the sequence of associated operations between backwashing-gas front and rear valves shown in FIG. 2.
  • In this embodiment, a total of four blocks are provided as filter blocks, two of which are in a honeycomb-type element (filter element) 2 at a top portion of a pressure vessel 1 and two of which are in a cylinder-type element (filter element) 3 at a bottom portion. Consequently, a backwashing-gas system 4 is divided into four subsystems and, in each system, a number of backwashing nozzles 5 required for the corresponding block is provided, and a set of backwashing valves constituted of a backwashing-gas front valve (second backwashing valve) 6, a backwashing-gas rear valve (first backwashing valve) 7, and a manual bypass valve 8 is provided on the upstream side of the backwashing nozzle 5.
  • A backwashing-gas buffer tank 9 is provided upstream of the backwashing-gas system 4, and, in addition, each pressurized-fluidized-bed-combustion boiler filter is connected to the backwashing-gas buffer tank 9 via a pipe 10.
  • Two high-pressure gas compressors 11 are provided upstream of the backwashing-gas buffer tank 9 and, of these two compressors, one compressor is used as an auxiliary unit.
  • The thus-configured backwashing-gas system 4 is operated as follows. That is, regarding high-temperature dust-containing gas that has entered from a dust-containing gas inlet 12 disposed at the top portion of the pressure vessel 1 of the pressurized-fluidized-bed-combustion boiler filter, one part thereof is subjected to dust removal in the two filter blocks at the top portion, which are configured of the porous-material honeycomb-type elements 2, and the remaining high-temperature dust-containing gas is subjected to dust removal in the two filter blocks formed of the cylinder-type elements 3 divided by a top-portion partitioning pipe plate (partitioning plate) 13, bottom-portion partitioning pipe plate (partitioning plate) 14, and inner-cylinder/outer-cylinder partitioning plate that are disposed at the bottom portion.
  • Purified gas that has passed through individual elements is removed to the outside via corresponding purified-gas lead-out pipes 15 and, after being combined, moves toward a gas turbine disposed downstream thereof. Dust that has been removed by each filter block drops to a dust hopper disposed at the bottom portion on the high-temperature dust-containing gas side and is discharged from a dust hopper outlet 16.
  • However, dust adhered to the high-temperature dust-containing gas side of each element does not necessarily drop off naturally, and it is necessary to cause a gas flow in a direction opposite to a normal flow, that is, to increase a gas pressure by applying a pressure wave of high-pressure gas in the opposite direction for an extremely short period of time (for example, 0.5 second) to shake off the dust adhered on the high-temperature dust-containing gas side, i.e., to perform backwashing. This backwashing is usually performed cyclically block by block in turn, and backwashing intervals are designed to be about several minutes.
  • As shown in FIG. 2, upon starting a backwashing cycle, first, the backwashing-gas front valve 6 slowly moves from a fully-closed position to a fully-open position over a predetermined period of time (for example, 2 to 10 seconds). At this time, the backwashing-gas rear valve 7 does not move, remaining in the fully-closed position (maintains the fully-closed position). When the backwashing-gas front valve 6 reaches the fully-open position and a predetermined period of time (for example, 1 to 2 seconds) has passed, the backwashing-gas rear valve 7 quickly moves from the fully-closed position to the fully-open position over an extremely short period of time (for example, 0.1 to 1 second), and thus, the backwashing-gas front valve 6 and the backwashing-gas rear valve 7 are in the fully-open positions, and the backwashing is performed for an extremely short period of time (for example, 0.1 to 1 second). When the backwashing is completed, the backwashing-gas rear valve 7 quickly moves from the fully-open position to the fully-closed position over an extremely short period of time (for example, 0.1 to 1 second). At this time, the backwashing-gas front valve 6 does not move, remaining in the fully-open position (maintains the fully-open position). When the backwashing-gas rear valve 7 reaches the fully-closed position and a predetermined period of time (for example, 1 to 2 seconds) has passed, the backwashing-gas front valve 6 slowly moves from the fully-open position to the fully-closed position over a predetermined period of time (for example, 2 to 10 seconds), and the backwashing-gas front valve 6 reaches the fully-closed position, thus ending the backwashing cycle. Then, when a predetermined period of time (for example, 4 to 10 minutes) has passed, the backwashing-gas front valve 6 begins to move again from the fully-closed position to the fully-open position, thus starting the next backwashing cycle.
  • With the apparatus for backwashing filter according to this embodiment, it is possible to reduce deterioration of a rotation shaft, a bearing, a valve piece, etc., of the backwashing-gas front valve 6 as compared with a conventional apparatus; even when there is considerable deterioration in a rotation shaft, a bearing, a valve piece, etc., of the backwashing-gas rear valve 7, it is possible to completely block a channel to which the backwashing-gas front valve 6 and the backwashing-gas rear valve 7 are connected by having the backwashing-gas front valve 6 in the fully-closed position; and thus, it is possible to ensure the reliability of the backwashing valves constituted of the backwashing-gas front valves 6 and the backwashing-gas rear valves 7.
  • Another embodiment of the present invention will be described using the explanatory diagram for the sequence of associated operations between backwashing-gas front and rear valves shown in FIG. 3.
  • As shown in FIG. 3, this embodiment differs from the above-described first embodiment in that the backwashing-gas front valve 6 is constantly maintained in the fully-open position (except for when it needs to be moved to the fully-closed position).
  • That is, upon starting a backwashing cycle, the backwashing-gas rear valve 7 quickly moves from the fully-closed position to the fully-open position over an extremely short period of time (for example, 0.1 to 1 second), and the backwashing-gas rear valve 7 reaches the fully-closed position, thus performing backwashing for an extremely short period of time (for example, 0.1 to 1 second). When the backwashing is completed, the backwashing-gas rear valve 7 quickly moves from the fully-open position to the fully-closed position over an extremely short period of time (for example, 0.1 to 1 second), thus ending the backwashing cycle. Then, when a predetermined period of time (for example, 4 to 10 minutes) has passed, the backwashing-gas rear valve 7 begins to move again from the fully-closed position to the fully-open position, thus starting the next backwashing cycle.
  • With the apparatus for backwashing filter according to this embodiment, it is possible to reduce deterioration of the rotation shaft, the bearing, the valve piece, etc., of the backwashing-gas front valve 6 as compared with the first embodiment; even when there is considerable deterioration in the rotation shaft, the bearing, the valve piece, etc., of the backwashing-gas rear valve 7, it is possible to completely block the channel to which the backwashing-gas front valve 6 and the backwashing-gas rear valve 7 are connected, by having the backwashing-gas front valve 6 in the fully-closed position; and thus it is possible to ensure the reliability of the backwashing valves constituted of the backwashing-gas front valves 6 and the backwashing-gas rear valves 7.
  • Note that the present invention is not limited to the above-described embodiments, and various alterations and modifications are possible, for example, to the number and operation sequence of the backwashing valves, within a range that does not depart from the gist of the present invention.
  • The application of the apparatus for backwashing filter according to the present invention is not limited to integrated coal gasification combined cycle systems equipped with the pressure vessel 1 shown in FIG. 1; it is also applicable to integrated coal gasification combined cycle systems equipped with a pressure vessel 21 shown in FIG. 4.
  • Note that, reference signs 22, 23, and 24 in FIG. 4 denote a gas lead-out pipe, a cylinder-type element (candle-type filter element), and a top-portion partitioning plate (tube sheet), respectively.
    • REFERENCE SIGNS LIST
    • 1: pressure vessel
    • 2: honeycomb-type element (filter element)
    • 3: cylinder-type element (filter element)
    • 4: backwashing-gas system
    • 5: backwashing nozzle
    • 6: backwashing-gas front valve (second backwashing valve)
    • 7: backwashing-gas rear valve (first backwashing valve)
    • 13: top-portion partitioning pipe plate (partitioning plate)
    • 14: bottom-portion partitioning pipe plate (partitioning plate)
    • 15: purified-gas lead-out pipe
    • 21: pressure vessel
    • 23: cylinder-type element (candle-type filter element)
    • 24: top-portion partitioning plate (tube sheet)

Claims (4)

1. An apparatus for backwashing filter in a dust removal device using porous material, having a plurality of filter blocks which are constituted of a plurality of filter elements accommodated in a pressure vessel and partitioning plates that partition or support these filter blocks, the pressure vessel being internally divided into a space for dust-containing gas, which includes a dust hopper, and a plurality of spaces for purified gas;
in an apparatus for backwashing filter that periodically performs backwashing of the filter elements for each of the filter blocks, wherein a backwashing nozzle directed toward the filter elements is provided inside purified-gas lead-out pipes or inside spaces upstream thereof, each of which is connected to the plurality of spaces for the purified gas or a filter-element outlet,
a first backwashing valve that controls gas for backwashing and a second backwashing valve that operates at slower speed than the first backwashing valve are disposed, in a series including two or more thereof, at backwashing-gas introducing pipes individually provided for each of the filter blocks.
2. An apparatus for backwashing filter in a dust removal device using porous material, having a plurality of filter blocks which are constituted of a plurality of filter elements accommodated in a pressure vessel and partitioning plates that partition or support these filter blocks, the pressure vessel being internally divided into a space for dust-containing gas, which includes a dust hopper, and a plurality of spaces for purified gas;
in an apparatus for backwashing filter that periodically performs backwashing of the filter elements for each of the filter blocks, wherein a backwashing nozzle directed toward the filter elements is provided inside purified-gas lead-out pipes or inside spaces upstream thereof, each of which is connected to the plurality of spaces for the purified gas or a filter-element outlet,
a first backwashing valve and a second backwashing valve are disposed, in a series including two or more thereof, at backwashing-gas introducing pipes individually provided for each of the filter blocks, and gas for backwashing is controlled by the first backwashing valve alone.
3. An integrated coal gasification combined cycle system equipped with the apparatus for backwashing filter according to claim 1.
4. An integrated coal gasification combined cycle system equipped with the apparatus for backwashing filter according to claim 2.
US13/003,722 2008-12-22 2009-09-08 Apparatus for backwashing filter Abandoned US20110154788A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2008325234A JP5427402B2 (en) 2008-12-22 2008-12-22 Filter backwash equipment
JP2008-325234 2008-12-22
PCT/JP2009/065666 WO2010073779A1 (en) 2008-12-22 2009-09-08 Back washing device of filter

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/065666 A-371-Of-International WO2010073779A1 (en) 2008-12-22 2009-09-08 Back washing device of filter

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/073,529 Continuation US9731240B2 (en) 2008-12-22 2013-11-06 Method for backwashing filter

Publications (1)

Publication Number Publication Date
US20110154788A1 true US20110154788A1 (en) 2011-06-30

Family

ID=42287406

Family Applications (2)

Application Number Title Priority Date Filing Date
US13/003,722 Abandoned US20110154788A1 (en) 2008-12-22 2009-09-08 Apparatus for backwashing filter
US14/073,529 Active 2030-02-27 US9731240B2 (en) 2008-12-22 2013-11-06 Method for backwashing filter

Family Applications After (1)

Application Number Title Priority Date Filing Date
US14/073,529 Active 2030-02-27 US9731240B2 (en) 2008-12-22 2013-11-06 Method for backwashing filter

Country Status (9)

Country Link
US (2) US20110154788A1 (en)
EP (1) EP2386343A4 (en)
JP (1) JP5427402B2 (en)
KR (1) KR101247882B1 (en)
CN (1) CN102099092B (en)
AU (1) AU2009332116A1 (en)
CA (1) CA2729941C (en)
WO (1) WO2010073779A1 (en)
ZA (1) ZA201100276B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5427402B2 (en) 2008-12-22 2014-02-26 三菱重工業株式会社 Filter backwash equipment
JP5787742B2 (en) * 2011-12-20 2015-09-30 三菱日立パワーシステムズ株式会社 Filter element playback method
CN103611343B (en) * 2013-12-10 2015-07-22 武汉市汉江石油物资技术开发有限责任公司 Backwash spray nozzle for granular filter material filter device
US10272382B2 (en) * 2016-05-31 2019-04-30 United Technologies Corporation Carrier gas reclamation system and method
GB2592267A (en) * 2020-02-24 2021-08-25 Altair Uk Ltd Pulse nozzle for filter cleaning systems
CN116179244B (en) * 2023-04-04 2023-09-05 太原理工大学 Pressurized gasification furnace for coal chemical industry

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295686A (en) * 1978-11-27 1981-10-20 Pemco-Kalamazoo, Inc. Disk wheel with resilient bearing support and rigid annular tread mounting surface
US4299597A (en) * 1979-02-19 1981-11-10 Gebruder Buhler Ag Process and filter control system for the cyclic counter-scavenging of diaphragm-activated filter hoses
US4343631A (en) * 1981-01-30 1982-08-10 Westinghouse Electric Corp. Hot gas particulate removal
US4539025A (en) * 1984-09-26 1985-09-03 Westinghouse Electric Corp. Filtering system
US4690700A (en) * 1983-11-07 1987-09-01 Howeth David Franklin Backflushed air filters with quick opening multiple discharge valve
US4734110A (en) * 1984-04-06 1988-03-29 L. & C. Steinmuller Gmbh Method and apparatus for removing solids from pressurized process system
US5116395A (en) * 1991-07-09 1992-05-26 Pneumafil Corporation Dust collection with programmable cleaning air control
US5167676A (en) * 1992-04-08 1992-12-01 The United States Of America As Represented By The United States Department Of Energy Apparatus and method for removing particulate deposits from high temperature filters
US5254144A (en) * 1992-08-19 1993-10-19 Pyropower Corporation Method and appartus for separating particulate material from combustible gases
US6056796A (en) * 1998-02-09 2000-05-02 The United States Of America As Represented By The United States Department Of Energy Rigid porous filter
US6658988B1 (en) * 1999-05-21 2003-12-09 Shell Oil Company Apparatus and process for removing solid particles from gases

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS497542B1 (en) * 1970-12-28 1974-02-21
GB2016432B (en) 1978-03-17 1982-11-24 Hoelter H Metal oxide-coated coated silica fibres hot gas filter
JPH01189318A (en) 1988-01-26 1989-07-28 Mitsubishi Heavy Ind Ltd Dust collector
JPH04118016A (en) * 1990-09-07 1992-04-20 Mitsui Eng & Shipbuild Co Ltd Method for dust collection by bag filter
JP3128261B2 (en) * 1991-04-24 2001-01-29 旭硝子株式会社 Backwashing device for hot gas duster and method for backwashing hot gas duster
JP3197144B2 (en) * 1994-03-24 2001-08-13 三菱重工業株式会社 Backwashing equipment for ceramic filters
JPH08192019A (en) 1995-01-13 1996-07-30 Japan Pionics Co Ltd Filter with backward washing mechanism
JPH09234324A (en) * 1996-03-01 1997-09-09 Mitsubishi Heavy Ind Ltd Dust removing apparatus
JPH1028827A (en) * 1996-07-19 1998-02-03 Mitsubishi Heavy Ind Ltd Dust collector
JP3765624B2 (en) * 1996-07-22 2006-04-12 株式会社ナムコ Running game device
JP3572148B2 (en) * 1996-07-22 2004-09-29 三菱重工業株式会社 Dust removal device
JPH10197022A (en) * 1997-01-09 1998-07-31 Kazutoshi Zeida Range hood filter
JP3416511B2 (en) * 1998-03-13 2003-06-16 三菱重工業株式会社 Dust removal device
DE19917165C2 (en) * 1999-04-16 2001-02-08 Karlsruhe Forschzent Process for cleaning tubular filter elements and device for carrying out the process
KR20000020312U (en) * 1999-05-03 2000-12-05 민흥기 Apparatus to inject compressed air of dust collector
JP2001000813A (en) * 1999-06-18 2001-01-09 Babcock Hitachi Kk Filter
JP2001017813A (en) * 1999-07-05 2001-01-23 Nkk Corp Method for operating bag filter
US6273925B1 (en) * 1999-09-10 2001-08-14 Mary Anne Alvin Filter assembly for metallic and intermetallic tube filters
JP3649176B2 (en) * 2001-10-31 2005-05-18 三菱マテリアル株式会社 Solid content removal equipment in high pressure process
JP4057281B2 (en) 2001-11-07 2008-03-05 住友ゴム工業株式会社 Pneumatic tire
JP2004066187A (en) * 2002-08-09 2004-03-04 Jutaku Service:Kk Non-woven fabric filter for kitchen ventilation air-guide-port and holding member therefor
JP2004196894A (en) * 2002-12-17 2004-07-15 Mitsubishi Heavy Ind Ltd Dust collector
FR2851290B1 (en) * 2003-02-18 2007-02-09 Peugeot Citroen Automobiles Sa ELECTROMECHANICAL VALVE CONTROL ACTUATOR FOR INTERNAL COMBUSTION ENGINE
US7833329B2 (en) * 2007-05-03 2010-11-16 Mott Corporation Plenum based high pressure blowback gas delivery system in a continuous process flow filtration system
JP5427402B2 (en) 2008-12-22 2014-02-26 三菱重工業株式会社 Filter backwash equipment

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295686A (en) * 1978-11-27 1981-10-20 Pemco-Kalamazoo, Inc. Disk wheel with resilient bearing support and rigid annular tread mounting surface
US4299597A (en) * 1979-02-19 1981-11-10 Gebruder Buhler Ag Process and filter control system for the cyclic counter-scavenging of diaphragm-activated filter hoses
US4343631A (en) * 1981-01-30 1982-08-10 Westinghouse Electric Corp. Hot gas particulate removal
US4690700A (en) * 1983-11-07 1987-09-01 Howeth David Franklin Backflushed air filters with quick opening multiple discharge valve
US4734110A (en) * 1984-04-06 1988-03-29 L. & C. Steinmuller Gmbh Method and apparatus for removing solids from pressurized process system
US4539025A (en) * 1984-09-26 1985-09-03 Westinghouse Electric Corp. Filtering system
US5116395A (en) * 1991-07-09 1992-05-26 Pneumafil Corporation Dust collection with programmable cleaning air control
US5167676A (en) * 1992-04-08 1992-12-01 The United States Of America As Represented By The United States Department Of Energy Apparatus and method for removing particulate deposits from high temperature filters
US5254144A (en) * 1992-08-19 1993-10-19 Pyropower Corporation Method and appartus for separating particulate material from combustible gases
US6056796A (en) * 1998-02-09 2000-05-02 The United States Of America As Represented By The United States Department Of Energy Rigid porous filter
US6658988B1 (en) * 1999-05-21 2003-12-09 Shell Oil Company Apparatus and process for removing solid particles from gases

Also Published As

Publication number Publication date
JP5427402B2 (en) 2014-02-26
WO2010073779A1 (en) 2010-07-01
EP2386343A4 (en) 2012-10-10
EP2386343A1 (en) 2011-11-16
CA2729941A1 (en) 2010-07-01
ZA201100276B (en) 2011-10-26
JP2010142774A (en) 2010-07-01
CA2729941C (en) 2013-05-21
KR20110036584A (en) 2011-04-07
KR101247882B1 (en) 2013-03-26
CN102099092A (en) 2011-06-15
CN102099092B (en) 2014-09-17
AU2009332116A1 (en) 2010-07-01
US20140059982A1 (en) 2014-03-06
US9731240B2 (en) 2017-08-15

Similar Documents

Publication Publication Date Title
US9731240B2 (en) Method for backwashing filter
CN100574851C (en) The apparatus and method of air cleaning
CN100475310C (en) Process and apparatus for purifying filter material of gas filter
EP3467381B1 (en) Exhaust gas denitration device, incinerator and exhaust gas denitration method
JP2004534646A (en) Method and apparatus for dedusting a dust-containing waste gas filter
JP2004534646A5 (en)
CN105008024B (en) Air drier
JP2008120912A (en) Gasification power generation system
US8226744B2 (en) Repressurization of a VSA treating a gas mixture comprising a fuel
WO2019228545A1 (en) Industrial flue gas treatment system
JP5665928B2 (en) Filter backwash equipment
CN210645755U (en) Quick row of active burnt material structure and active burnt discharge system
AU2019368954B9 (en) Gas Purification Apparatus, Ship Including the Same, and Gas Purification Method
DE202007001447U1 (en) Combustion exhaust gas reformer for internal combustion engine in motor vehicle, has diffusion unit,, which borders chambers, where low pressure is obtained in hot reformer such that reformate gas is guided as secondary fuel to engine
JPH11253727A (en) Dust removing apparatus
CN218879824U (en) Fuel gas purification system
JP3117274B2 (en) Dust collection device
US10458329B2 (en) System and process for recovering power and steam from regenerator flue gas
JP2010236366A (en) Exhaust gas treatment system for engine equipped with black smoke removing device and method for cleaning black smoke removing device
CN111412447A (en) Method and system for generating steam by using synthesis gas of coal gasification device
RU2283685C1 (en) Filter
CN115769025A (en) Hot waste gas purifying equipment
JPH07256036A (en) Backwashing device for ceramic filter
JPH06339609A (en) Deduster
JPS63230913A (en) Steam pipeline purifying facility and method of single shaft type combined cycle power plant

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION