WO1988006484A1 - A method for absorbing gaseous components from acidifying flue gases - Google Patents

A method for absorbing gaseous components from acidifying flue gases Download PDF

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Publication number
WO1988006484A1
WO1988006484A1 PCT/SE1988/000101 SE8800101W WO8806484A1 WO 1988006484 A1 WO1988006484 A1 WO 1988006484A1 SE 8800101 W SE8800101 W SE 8800101W WO 8806484 A1 WO8806484 A1 WO 8806484A1
Authority
WO
WIPO (PCT)
Prior art keywords
flue gases
acidifying
lime
burnt lime
gas
Prior art date
Application number
PCT/SE1988/000101
Other languages
French (fr)
Inventor
Kurt Carlsson
Original Assignee
Fläkt Ab
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 Fläkt Ab filed Critical Fläkt Ab
Publication of WO1988006484A1 publication Critical patent/WO1988006484A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/68—Halogens or halogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/508—Sulfur oxides by treating the gases with solids

Definitions

  • TITLE OF THE INVENTION A METHOD FOR ABSORBING GASEOUS COMPONENTS FROM ACIDIFYING FLUE GASES.
  • the present invention relates to a method for absorbing the acidifying components of acid flue gases generated, for instance, when burning fossil fuels or waste, such as domestic waste, by supplying to the acidifying flue gases finely-divided burnt lime (CaO).
  • CaO finely-divided burnt lime
  • the present invention relates to a method for cleansing combustion gases in accordance with 3) above.
  • acid components can be removed from combustion gases en ⁇ gendered when burning fossil fuels or waste material, by establishing contact between the acid gas components and an absorbent charged to the gas mixture, such that this absorbent is able to react with and bind the acid components and therewith form one or more salts.
  • the feature most characteristic of the wet processes is one of bringing the gas mixture into contact with a large quantity of aqueous solution or aqueous suspension containing one or more alkaline components, wherein the ratio between the quantity of liquid supplied and the quantity of ' gas de ⁇ livered to the absorption stage, effected in a reaction chamber, is of such large magnitude that the enthalpy content of the gas can vaporize only a minor persentage of the water supplied.
  • the present state of the art includes . plants which operate in accordance with the aforesaid method and which are intended for separating sulphur dioxide from flue gases produced in coal-fired boilers .
  • the advantage of the wet process is that the cost for chemicals are low, mai nly because inexpensive l imestone can be used for neutral izing purposes and because stoichiometric quantities wi l l suffice .
  • the feature most characteristic of the spray drying process is one in which an absorbent is ⁇ lurried or dissolved in a limited amount of water which is smaller than the amount required to cool the gas down to saturation, and in which the aqueous solution or slurry is delivered to the gas in droplet form.
  • the droplets shall be small enough to vaporize in the reaction chamber.
  • Dry residual products are then extracted from the gas in a conventional downstream dust separator.
  • the flue gases are brought into contact with a dry absorbent, which is normally blown in powder form into the reaction chamber and disperses therein.
  • the absorbent normally used in this process is dry-slaked lime, i.e. Ca(OH) 2 , which is more expensive than burnt lime (CaO) .
  • This higher cost is caused by the inclusion of the slak ⁇ ing process and by a weight increase due to the water content of the product.
  • a finely divided absorbent will bind the acid components of a flue gas to a greater extent than a coarsely divided absorbent.
  • Acid components will also bind more readily to the surfaces of a porous absorbent than to the surfaces of a more dense absorbent.
  • the flue gases must not be cooled to a temperature which is equal to or lies beneath an adiabetic saturation temperature at which moisture will precipitate onto the walls of the reaction chamber and passageways. Conse ⁇ quently, there shall be chosen a temperature which lies above this value, so that no moisture is precipitated.
  • the present invention can be considered to relate to the "dry process".
  • the dry process In the case of contact reactors of the aforesaid kind in which the contaminated medium is a flow of flue gas, it is known when practicing the dry process, and also when practicing the spray drying process, to ensure that the process of actually cleansing the gas is effected at a temperature which lies as close as possible to the dew point of the gas.
  • the measures taken to lower the temperature of the process create conditions which enable the dust or contaminants to be moistened slightly, therewith to render the absorption of and the chemical reaction with the acid contaminants or compo ⁇ nents more effective.
  • a further technical problem resides in the ability of ad ⁇ justing the temperature and moisture conditions in a flow of flue gas, so that finely-ground burnt lime introduced in mist form into the flue gas is slaked effectively.
  • Another technical problem in this regard is one of real ⁇ izing that when applying suitable temperature and mois ⁇ ture values, burnt lime will be slaked so rapidly in a gas flow that slaking of the lime can be effected during passage of the gas from the boiler to a downstream ab- sorption reactor.
  • the present invention relates to a method for extracting by absorption the acid components of acidifying flue gases, e.g. the gases generated when combusting fossil fuels or waste materials, by introducing finely-ground burnt lime into the acidifying flue gases.
  • the burnt lime is in ⁇ troduced in powder form within a section in which the temperature of the flue gases lies within the range of 65 C to 180 C, and the moisture content of said gases lies between 3 and 40 % by volume.
  • water is added to the gas in an amount which is sufficient to cool the gas to a temperature of from 65 C to 180 C and which will achieve a gas moisture-content of from 3 to 40 % by volume, while observing the moisture generated during the actual com ⁇ bustion process.
  • the flue gases are caused to pass through a reactor which may be of very simple construction and which may consist of for instance, a short channel or passageway located be ⁇ tween a cooler and a dust separator.
  • the solid particles, the salts formed by the absorption process, and the un-reacted materia.1 present in the flue gases are extracted in a dust separator, for instance an electrostatic dust precipitator, a fabric filter, a bed filter, etc.
  • the burnt lime is slaked by the water present in a first process stage such as to form an extremely fine powdered lime hydrate, and the acid gas components are caused to react with ⁇ the lime hydrate powder in a subsequent absorption stage.
  • chlorine-containing sub ⁇ stances may be added, so as to form hygroscopic calcium chloride and therewith enhance the reaction between lime and sulphur dioxide.
  • the illustrated plant includes a combustion furnace 1 for burning waste material, the arrow 2 indicating the supply of combustible waste into the furnace and the arrow 3 indicating the supply of combustion air.
  • the acidifying flue gases generated by the combustion process pass from the furnace 1 to a cooler 5, through a conduit 4.
  • the cooler 5 may have the form of a heat exchanger but is preferably a cooling tower or some similar apparatus.
  • Water is supplied to the cooler 5 through a pipe 5a and sprayed into the flue gases.
  • the thus cooled flue gases pass to a chemical reactor 7 through a further conduit 6, into which finely- ground burnt lime is introduced, as indicated by an arrow 8.
  • the cleansed gases exit from the plant through a conduit 11 to a smoke stack, not shown.
  • the material extracted from the flue gas in the dust separator 10 is passed through a conduit 12 to a unit 13, from which material is either recycled back to the chem ⁇ ical reactor 1 , through a conduit 14, or is removed for dumping, through a conduit 15.
  • powdered burnt lime is introduced through the conduit 8 within a section in which the flue gases have a temperature within the range of 65 C to 180°C and a moisture content of between 3 and 40 % by volume.
  • the burnt lime will be slaked in a first reaction stage (either totally or substantially in the passageway sec ⁇ tion 6a) in accordance with the formula
  • the second reaction stage may be effected within the re ⁇ actor 7 , and in accordance with one or more of the re ⁇ actions

Abstract

The invention relates to a method for absorbing the acidifying gaseous components of flue gases generated, for instance, when burning fossil fuels or waste materials, by supplying finely-ground burnt lime (CaO) to the system. The burnt lime is supplied (8) in powder form within a section in which the flue gases have a temperature of from 65°C to 180°C and a moisture content between 3 and 40 % by volume.

Description

TITLE OF THE INVENTION: A METHOD FOR ABSORBING GASEOUS COMPONENTS FROM ACIDIFYING FLUE GASES.
TECHNICAL FIELD
The present invention relates to a method for absorbing the acidifying components of acid flue gases generated, for instance, when burning fossil fuels or waste, such as domestic waste, by supplying to the acidifying flue gases finely-divided burnt lime (CaO).
BACKGROUND PRIOR ART
The combustion of the majority of fossil fuels engenders the production of acidifying gases which are harmful to both animate and inanimate matters.
Various methods and apparatus for reducing the emission of these acid gas components have been proposed, The methods proposed primarily involve:
1) Cleansing the fuel used.
2) Binding the acid components concerned in conjunction with the combustion of the fuel.
3) Cleansing the gases produced by fuel combustion.
The present invention relates to a method for cleansing combustion gases in accordance with 3) above.
There are known to the art a number of methods by means of which, in accordance with 3) above, acid components can be removed from combustion gases en¬ gendered when burning fossil fuels or waste material, by establishing contact between the acid gas components and an absorbent charged to the gas mixture, such that this absorbent is able to react with and bind the acid components and therewith form one or more salts.
Present day processes intended for this purpose can be classified under the following groups, with regard to the characteristic features of the processes;
a) wet processes carried out in so-called scrubbers, b) semi-dry processes, so-called spray drying processes carried out in spray dryers, scrubbers, etc, and c) dry processes carried out in dry scrubbers.
With regard to classification a) above, the feature most characteristic of the wet processes is one of bringing the gas mixture into contact with a large quantity of aqueous solution or aqueous suspension containing one or more alkaline components, wherein the ratio between the quantity of liquid supplied and the quantity of 'gas de¬ livered to the absorption stage, effected in a reaction chamber, is of such large magnitude that the enthalpy content of the gas can vaporize only a minor persentage of the water supplied.
The flue gases departing from the absorption stage of this process are saturated with water vapour.
The present state of the art includes . plants which operate in accordance with the aforesaid method and which are intended for separating sulphur dioxide from flue gases produced in coal-fired boilers .
The advantage of the wet process is that the cost for chemicals are low, mai nly because inexpensive l imestone can be used for neutral izing purposes and because stoichiometric quantities wi l l suffice . With regard to classification b) above, the feature most characteristic of the spray drying process is one in which an absorbent is εlurried or dissolved in a limited amount of water which is smaller than the amount required to cool the gas down to saturation, and in which the aqueous solution or slurry is delivered to the gas in droplet form.
The droplets, however, shall be small enough to vaporize in the reaction chamber.
Dry residual products are then extracted from the gas in a conventional downstream dust separator.
In this porcess normally wet-slaked lime in slurry form is sprayed into a reactor.
This process also requires the chemicals used to be present in excessive quantities.
Finally, in the case of the dry processes under classifi¬ cation c) above, the flue gases are brought into contact with a dry absorbent, which is normally blown in powder form into the reaction chamber and disperses therein.
The absorbent normally used in this process is dry-slaked lime, i.e. Ca(OH)2, which is more expensive than burnt lime (CaO) .
This higher cost is caused by the inclusion of the slak¬ ing process and by a weight increase due to the water content of the product.
Practical experience has shown that although finely ground limestone will provide a certain degree of separa- tion, the extent to which the acid components are ex¬ tracted is often much too small.
It is also recognized within the art that a moist absor- bent tends to bind the acid components of an acidified flue gas to a greater extent than a dry absorbent.
Furthermore, a finely divided absorbent will bind the acid components of a flue gas to a greater extent than a coarsely divided absorbent.
Acid components will also bind more readily to the surfaces of a porous absorbent than to the surfaces of a more dense absorbent.
It is also recognized in the art that the flue gases must not be cooled to a temperature which is equal to or lies beneath an adiabetic saturation temperature at which moisture will precipitate onto the walls of the reaction chamber and passageways. Conse¬ quently, there shall be chosen a temperature which lies above this value, so that no moisture is precipitated.
Finally, it is also recognized in the art that the use of larger quantities of absorbent and/or absorbents which possess higher absorption tendencies - and therewith more expensive absorbents - increases the extent to which such acid gases are cleansed, and that there is a desire to maintain the amount of absorbent used per unit of time at a low level and to use an inexpensive absorbent to achieve a predetermined level of cleansing.
The present invention can be considered to relate to the "dry process". In the case of contact reactors of the aforesaid kind in which the contaminated medium is a flow of flue gas, it is known when practicing the dry process, and also when practicing the spray drying process, to ensure that the process of actually cleansing the gas is effected at a temperature which lies as close as possible to the dew point of the gas. In this regard, the measures taken to lower the temperature of the process create conditions which enable the dust or contaminants to be moistened slightly, therewith to render the absorption of and the chemical reaction with the acid contaminants or compo¬ nents more effective.
It has also been established that the extraction of gas- eous heavy metals and several organic compo¬ nents is improved when the gas cleansing process is effected at a low working temperature.
In contact reactors which operate in accordance with the dry process, it is also known to use a slaked lime absorbent which is spread as a dust throughout the reactor chamber of the reactor and is binding chemically the acid contaminants present in the chamber, when these acid contaminants come into contact with the lime particles. It will be obvious that the chemical reaction taking place will -increase in number with lime particles which exhibit an increasing acitve surface area. An effective reaction surface of about 15 m /gram is estimated for slaked lime.
SUMMARY OF THE INVENTION
TECHNICAL PROBLEMS With regard to the prior state of the art as described above it will be seen that in order to be effective, the process of gas cleansing with the use of powdered ab¬ sorbent should be effected rapidly and effectively be¬ tween the contaminant, such as sulphur dioxide, hydrogen chloride and/or hydrogen fluoride, and the powdered ab¬ sorbent used, and it will also be seen that a technical problem resides in the provision of conditions which enable an inexpensive absorbent to be imparted a reaction tendency which is equivalent to that of the more expen¬ sive slaked lime previously used.
One technical problem in this regard is to recognize that finely-ground burnt lime can actually be slaked in a gas flow which contains sufficient moisture for this purpose.
A further technical problem resides in the ability of ad¬ justing the temperature and moisture conditions in a flow of flue gas, so that finely-ground burnt lime introduced in mist form into the flue gas is slaked effectively.
Another technical problem in this regard is one of real¬ izing that when applying suitable temperature and mois¬ ture values, burnt lime will be slaked so rapidly in a gas flow that slaking of the lime can be effected during passage of the gas from the boiler to a downstream ab- sorption reactor.
It will also be seen that when carrying out the dry cleansing process a technical problem resides in the pro¬ vision of conditions which will enable a flue gas temper- ature suitable for the supply of finely-ground burnt lime to be selected, while at the same time adapting the moisture content of the flue gases to the desired reac¬ tion in the absorption reactor. SOLUTION The present invention relates to a method for extracting by absorption the acid components of acidifying flue gases, e.g. the gases generated when combusting fossil fuels or waste materials, by introducing finely-ground burnt lime into the acidifying flue gases.
In accordance with the invention, the burnt lime is in¬ troduced in powder form within a section in which the temperature of the flue gases lies within the range of 65 C to 180 C, and the moisture content of said gases lies between 3 and 40 % by volume.
In accordance with one embodiment of the invention, when the moisture content of the flue gas generated by the combustion process is too low, water is added to the gas in an amount which is sufficient to cool the gas to a temperature of from 65 C to 180 C and which will achieve a gas moisture-content of from 3 to 40 % by volume, while observing the moisture generated during the actual com¬ bustion process.
In accordance with a further embodiment of the invention, the flue gases are caused to pass through a reactor which may be of very simple construction and which may consist of for instance, a short channel or passageway located be¬ tween a cooler and a dust separator.
The solid particles, the salts formed by the absorption process, and the un-reacted materia.1 present in the flue gases are extracted in a dust separator, for instance an electrostatic dust precipitator, a fabric filter, a bed filter, etc.
According to a particularly preferred embodiment of the invention, the burnt lime is slaked by the water present in a first process stage such as to form an extremely fine powdered lime hydrate, and the acid gas components are caused to react with ■ the lime hydrate powder in a subsequent absorption stage.
Finally, it is proposed that chlorine-containing sub¬ stances may be added, so as to form hygroscopic calcium chloride and therewith enhance the reaction between lime and sulphur dioxide.
ADVANTAGES Those primary advantages afforded by a method according to this invention reside in the provision of conditions which enable an inexpensive burnt lime to be used in¬ stead of slaked lime, by adjusting the temperature range and moisture content of the flue gases to values at which the burnt lime is slaked, so as to improve the absorption of the acid components of an acidifying flue gas gener- ated when burning fossil fuels and waste materials.
The primary characteristic features of the inventive method are set forth in the characterizing clause of the following claim 1.
BRIEF DESCRIPTION OF THE DRAWING
An exemplifying embodiment of the inventive method for extracting gaseous acid components from acidifying flue gases will now be described in more detail with the aid of the accompanying drawing, the single figure of which is a highly simplified illustration of a plant in which the inventive method may be carried out.
DESCRIPTION OF A PREFERRED EMBODIMENT
The illustrated plant includes a combustion furnace 1 for burning waste material, the arrow 2 indicating the supply of combustible waste into the furnace and the arrow 3 indicating the supply of combustion air.
The acidifying flue gases generated by the combustion process pass from the furnace 1 to a cooler 5, through a conduit 4.
The cooler 5 may have the form of a heat exchanger but is preferably a cooling tower or some similar apparatus.
Water is supplied to the cooler 5 through a pipe 5a and sprayed into the flue gases. The thus cooled flue gases pass to a chemical reactor 7 through a further conduit 6, into which finely- ground burnt lime is introduced, as indicated by an arrow 8.
Reaction products in the form of salts formed in the re¬ actor 7, together with the solids and un-reacted substances present, pass with the flue gases through a conduit to a dust separator 10, which may be an electrostatic dust separator, a fabric filter or some corresponding apparatus, in which the particles are removed. The cleansed gases exit from the plant through a conduit 11 to a smoke stack, not shown.
The material extracted from the flue gas in the dust separator 10 is passed through a conduit 12 to a unit 13, from which material is either recycled back to the chem¬ ical reactor 1 , through a conduit 14, or is removed for dumping, through a conduit 15.
In accordance with the invention, powdered burnt lime is introduced through the conduit 8 within a section in which the flue gases have a temperature within the range of 65 C to 180°C and a moisture content of between 3 and 40 % by volume.
These conditions can be achieved either by cooling the flue gases with water in the cooler 5 or, when the moisture content of the gases generated by combustion is sufficient for the intended purpose, by cooling the flue gases in the cooler 5 without the aid of water.
With regard to the particular reaction which is strived for in accordance with the present invention by the in¬ troduction of finely-ground burnt lime through the con- duit 8 at the aforesaid flue gas temperature and parti¬ cularly within the aforesaid moisture-content range, the burnt lime will be slaked in a first reaction stage (either totally or substantially in the passageway sec¬ tion 6a) in accordance with the formula
CaO + H20 = Ca(OH)2
therewith to form a very fine hydrated-lime powder that possesses a tendency to react with gaseous acid compo¬ nents.
These fine reactive particles which exhibit a large spe- cific surface area are then passed to a second stage (an absorption stage), where they react with the acid gas components, such as HC1 , SOg and HF.
The second reaction stage may be effected within the re¬ actor 7 , and in accordance with one or more of the re¬ actions
Ca(OH)2 + 2HC1 = CaCl2 + 2H20
Ca(0H)2 + S02 = CaS03iH20 + 2H20
Ca(OH)2 + 2HF = CaF2 + 2H20
The addition of a chlorine-containing substance improves the extraction of sulphur dioxide (S0?), through the resultant formation of hygroscopic calcium chlorides (CaCl2) .
It will be understood that the invention is not restrict¬ ed to the illustrated and described example, and that modifications can be made within the inventive scope defined in the following claims.

Claims

' CLAIMS
1. A method for absorbing acidifying components from acidifying flue gases generated, for example, when burn- ing fossil fuels or waste material by supplying finely- ground burnt lime (CaO) to the acidifying flue gases, characterized by introducing the burnt lime in powder form within a section in which the flue gases have a temperature of from 65 C to 180 C and a moisture content of from 3 to 40% by volume- and by extracting the solids, the salts formed by said absorption, and the un-reacted material present in the flue gases in a dust separator, e.g. an electrostatic dust separator, a fabric filter a bed filter or like device.
2. A method according to claim 1, characterized by cooling the flue gases to a temperature of from 65°C to 180 C by adding water to an extent which will produce a moisture content of between 3 and 40 % by volume.
3. A method according to claim 1 or claim 2, charactericed by slaking t burnt lime in a first stage (CaO + H-0 = Ca(OH)2) to form a very fine hydrated lime powder, and by reacting the acid gaseous components, such as HCl, SO, HF, with the outer surfaces of the powdered hydrated lime in a subse¬ quent absorption stage.
4. A Method according to claim 1 , 2 or 3 , characterized by adding a chlorine-containing substance to form hygro¬ scopic calcium chloride in order to improve the extrac¬ tion of sulphur dioxide.
PCT/SE1988/000101 1987-03-06 1988-03-04 A method for absorbing gaseous components from acidifying flue gases WO1988006484A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8700945-2 1987-03-06
SE8700945A SE460642B (en) 1987-03-06 1987-03-06 PROCEDURES FOR ABSORPING GAS GAS COMPONENTS FROM FORECURATED SMOKE GASES

Publications (1)

Publication Number Publication Date
WO1988006484A1 true WO1988006484A1 (en) 1988-09-07

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EP (1) EP0308447A1 (en)
AU (1) AU1424188A (en)
SE (1) SE460642B (en)
WO (1) WO1988006484A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0596229A1 (en) * 1992-10-02 1994-05-11 Abb Fläkt Ab Process for cleaning exhaust gas from waste incinerators
EP0922484A1 (en) * 1996-06-19 1999-06-16 Nkk Corporation Method for treating incineration flue gas
US6033639A (en) * 1995-12-15 2000-03-07 Abb Flakt Ab Method for cleaning process gases
FR2883772A1 (en) * 2005-03-30 2006-10-06 Lab Sa Sa Procedure and plant for cleaning fumes containing acid pollutants uses gas/solids separator, activation reactor and recycles proportion of solids and gas
EP1857167A1 (en) 1998-05-18 2007-11-21 Alstom Method and apparatus for cleaning flue gases.
FR2957528A1 (en) * 2010-03-22 2011-09-23 Lab Sa METHOD AND INSTALLATION FOR PURIFYING SMOKE CONTAINING ACIDIC POLLUTANTS

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
FI88681C (en) * 1990-10-18 1993-06-28 Sf Cleanair Oy Foerfarande och anordning Foer rening av roekgaser vid oljepannor
SE9100584D0 (en) * 1991-02-28 1991-02-28 Flaekt Ab SETTING TO CLEAN PROCESS GASES CONTAINING GAS GAS POLLUTANTS
SE504755C2 (en) * 1994-12-23 1997-04-21 Flaekt Ab Method and apparatus for separating gaseous pollutants, such as sulfur dioxide and hydrogen chloride, from flue gases formed during combustion in fluidized bed
US20160289143A1 (en) 2015-04-01 2016-10-06 Siluria Technologies, Inc. Advanced oxidative coupling of methane

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SE422890B (en) * 1975-05-06 1982-04-05 Hoelter H GAS PURIFICATION AND EQUIPMENT
EP0177896A2 (en) * 1984-10-12 1986-04-16 MikroPul Ducon Gesellschaft für Mahl- und Staubtechnik mbH Process and device for neutralising and separating pollutants in flue or exhaust gases
US4588569A (en) * 1985-02-21 1986-05-13 Intermountain Research & Development Corporation Dry injection flue gas desulfurization process using absorptive soda ash sorbent
EP0182706A1 (en) * 1984-11-12 1986-05-28 Syprim Air Industrie Environnement Semi-dry process for eliminating pollutants contained in fumes
EP0196481A1 (en) * 1985-03-13 1986-10-08 Von Roll Ag Method of and apparatus for removing pollutants from a gaseous carrier
EP0226863A1 (en) * 1985-11-29 1987-07-01 General Electric Company Method for scrubbing sulfur oxides and nitrogen oxides in a flue gas duct

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE422890B (en) * 1975-05-06 1982-04-05 Hoelter H GAS PURIFICATION AND EQUIPMENT
EP0177896A2 (en) * 1984-10-12 1986-04-16 MikroPul Ducon Gesellschaft für Mahl- und Staubtechnik mbH Process and device for neutralising and separating pollutants in flue or exhaust gases
EP0182706A1 (en) * 1984-11-12 1986-05-28 Syprim Air Industrie Environnement Semi-dry process for eliminating pollutants contained in fumes
US4588569A (en) * 1985-02-21 1986-05-13 Intermountain Research & Development Corporation Dry injection flue gas desulfurization process using absorptive soda ash sorbent
EP0196481A1 (en) * 1985-03-13 1986-10-08 Von Roll Ag Method of and apparatus for removing pollutants from a gaseous carrier
EP0226863A1 (en) * 1985-11-29 1987-07-01 General Electric Company Method for scrubbing sulfur oxides and nitrogen oxides in a flue gas duct

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0596229A1 (en) * 1992-10-02 1994-05-11 Abb Fläkt Ab Process for cleaning exhaust gas from waste incinerators
US6033639A (en) * 1995-12-15 2000-03-07 Abb Flakt Ab Method for cleaning process gases
EP0922484A1 (en) * 1996-06-19 1999-06-16 Nkk Corporation Method for treating incineration flue gas
EP1857167A1 (en) 1998-05-18 2007-11-21 Alstom Method and apparatus for cleaning flue gases.
FR2883772A1 (en) * 2005-03-30 2006-10-06 Lab Sa Sa Procedure and plant for cleaning fumes containing acid pollutants uses gas/solids separator, activation reactor and recycles proportion of solids and gas
EP1716910A2 (en) * 2005-03-30 2006-11-02 Lab Sa Method and plant for purifying flue gas containing acidic pollutants
EP1716910A3 (en) * 2005-03-30 2007-12-19 Lab Sa Method and plant for purifying flue gas containing acidic pollutants
FR2957528A1 (en) * 2010-03-22 2011-09-23 Lab Sa METHOD AND INSTALLATION FOR PURIFYING SMOKE CONTAINING ACIDIC POLLUTANTS
EP2371444A1 (en) * 2010-03-22 2011-10-05 Lab Sa Process and device for the purification of fumes containing acidic pollutants

Also Published As

Publication number Publication date
SE460642B (en) 1989-11-06
SE8700945L (en) 1988-09-07
SE8700945D0 (en) 1987-03-06
EP0308447A1 (en) 1989-03-29
AU1424188A (en) 1988-09-26

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