DE3713600A1 - Dry gas purification based on sodium with an alkaline support material - Google Patents

Dry gas purification based on sodium with an alkaline support material

Info

Publication number
DE3713600A1
DE3713600A1 DE19873713600 DE3713600A DE3713600A1 DE 3713600 A1 DE3713600 A1 DE 3713600A1 DE 19873713600 DE19873713600 DE 19873713600 DE 3713600 A DE3713600 A DE 3713600A DE 3713600 A1 DE3713600 A1 DE 3713600A1
Authority
DE
Germany
Prior art keywords
sodium
support material
gas purification
hydroxide solution
sodium hydroxide
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.)
Withdrawn
Application number
DE19873713600
Other languages
German (de)
Inventor
Heinz Dipl Ing Hoelter
Heinrich Dipl Ing Igelbuescher
Heinrich Ing Grad Gresch
Heribert Dipl Ing Dewert
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19873713600 priority Critical patent/DE3713600A1/en
Priority to DE19873735245 priority patent/DE3735245A1/en
Publication of DE3713600A1 publication Critical patent/DE3713600A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
    • 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
    • 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
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • 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
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/041—Oxides or hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/043—Carbonates or bicarbonates, e.g. limestone, dolomite, aragonite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3204—Inorganic carriers, supports or substrates

Abstract

In the process for dry gas purification based on sodium with an alkaline support material for exhaust gas purification of acidic pollutant gases such as SO2, HCl, HF and also NOx, a calcium silicate impregnated with sodium hydroxide solution/sodium carbonate is added to the gas stream in a reaction section and separated off again in a downstream filter device. In this case, both the sodium hydroxide solution/sodium carbonate and the alkaline support material react with the acidic gas components. The support material can be used several times before it itself is exhausted.

Description

Es ist bekannt, SO2, HCl, HF und weitere saure Stoffe mittels z. B. Kalk zu absorbieren und aus dem Gasstrom über einen Filter abzuscheiden.It is known to use SO 2 , HCl, HF and other acidic substances using, for. B. absorb lime and separate from the gas stream through a filter.

Es ist weiterhin bekannt, z. B. Blähstoffe zu nehmen, Blähtone oder geblähtes Kalzium-Aluminium-Silikat mit Natronlauge zu tränken und die sauren Schadstoffe in einem Reaktor mit nachgesetztem Filter mit dem alkali­ schen Bindemittel reagieren zu lassen, als Endprodukt CaSO3 und/oder CaSO4 abzuscheiden bzw. auch als Natrium­ sulfit oder Natriumsulfat.It is also known, e.g. B. to take expandables, soak expanded clay or expanded calcium-aluminum-silicate with sodium hydroxide solution and to react the acidic pollutants in a reactor with a subsequent filter with the alkaline binder, to separate out CaSO 3 and / or CaSO 4 as the end product or also as sodium sulfite or sodium sulfate.

Die gesamte Chemisorption der sauren Gasbestandteile lief bisher nur durch die Natronlauge, da der Träger­ stoff chemisch neutral war.
So far, the entire chemisorption of the acidic gas components has only been carried out by the sodium hydroxide solution, since the carrier was chemically neutral.

Um den Trägerstoff auch noch wirksam für die Absorption zu nutzen, wird erfindungsgemäß vorgeschlagen, ein poröses Kalziumsilikat zu nutzen, das in den Kapillaren Natronlauge oder Natriumcarbonat aufnehmen kann und somit als Chemisorptions-Kontaktmittel in einem Kontakt­ rohr oder in einem Kontaktreaktor mit einem nachgesteuer­ ten Abscheider die entsprechende Chemisorptionsarbeit zur Abscheidung von SO2, HCl, HF zu übernehmen.In order to also use the carrier effectively for absorption, it is proposed according to the invention to use a porous calcium silicate which can absorb sodium hydroxide solution or sodium carbonate in the capillaries and thus as a chemisorption contact agent in a contact tube or in a contact reactor with a post-controlled separator to take over the corresponding chemisorption work for the separation of SO 2 , HCl, HF.

Es wurde weiterhin gefunden, daß diese Kombination von porösem Kalziumsilikat mit Natronlauge oder Natrium­ carbonat nicht nur die genannten sauren Schadstoffe auf­ nimmt, sondern daß auch im gewissen Umfang eine NO x - Abscheidung stattfindet. Versuche haben diesen über­ raschend gefundenen Effekt gebracht.It was also found that this combination of porous calcium silicate with sodium hydroxide solution or sodium carbonate not only takes up the acidic pollutants mentioned, but also that NO x separation takes place to a certain extent. Experiments have brought this surprisingly found effect.

Erfindungsgemäß wird diese Chemisorptionstechnik dort eingesetzt, wo das heiße Rauchgas von z. B. 140 bis 180°C nicht mehr abgekühlt werden darf. Das heißt, es ist keine naßtechnische Gaswäsche möglich, wenn nicht hinterher eine Wiederaufheizung durchgeführt werden muß, um der Ausbreitungsberechnung, die in der TA-Luft angegeben wird, Genüge zu leisten.According to the invention, this chemisorption technique is there used where the hot flue gas from z. B. 140 to 180 ° C may no longer be cooled. That is, it is not Wet gas scrubbing possible if not afterwards reheating must be carried out in order to  Propagation calculation given in the TA-Luft will do enough.

Bei einem trockenen Verfahren muß bei reiner Kalkein­ blasung die Temperatur auf unter 90°C heruntergequenscht werden, um überhaupt eine genügend hohe Abscheideleistung zu erzielen. All diese Nachteile a) bei der nassen Wäsche und b) bei der bekannten trockenen Chemisorption sind bei der erfindungsgemäßen Technologie nicht mehr vor­ handen. Es kann jetzt nicht nur die Natronlauge/Natrium­ carbonat vollends technisch genutzt werden, sondern auch gleichzeitig der Trägerstoff kann mehrfach im Kreise ge­ führt werden und wieder mit Natronlauge/Natriumcarbonat getränkt werden, bis daß er schlußendlich auch abreagiert ist, so daß eine Ballaststoffmenge, wie man sie bisher bei dem Einsatz von Trockenkalk kannte, z. B. stöchiome­ trischer Faktor gegenüber SO2 mindestens 2, hier auf etwa 1,1 gesenkt werden kann. Es ist gleichbedeutend, daß die Deponiefracht um etwa 50% gemindert wird. Ohne Wiederaufheizung ist somit eine Technik gewähr­ leistet, die der TA-Luft genügt. In a dry process with pure lime blowing, the temperature must be quenched to below 90 ° C in order to achieve a sufficiently high separation performance. All these disadvantages a) in wet laundry and b) in the known dry chemisorption are no longer present in the technology according to the invention. Not only can the sodium hydroxide solution / sodium carbonate now be used completely technically, but at the same time the carrier can be circulated several times and soaked again with sodium hydroxide solution / sodium carbonate until it is finally reacted, so that an amount of fiber such as previously known when using dry lime, e.g. B. stoichiometric factor compared to SO 2 at least 2, here can be reduced to about 1.1. It is tantamount that the landfill load is reduced by about 50%. Without reheating, technology is guaranteed that satisfies the TA-Luft.

Ein weiterer Vorteil des erfindungsgemäßen Verfahrens gegenüber z. B. der Fahrung mit einem Sprühabsorber ist, daß bei dem beschriebenen Verfahren im Gegensatz zum halbtrockenen Verfahren es zu keinen Anbackungen in den Reaktionsstrecken kommen kann. Weiterhin ist zu bedenken, daß die Transportkosten bei dem beschriebenen Verfahren wesentlich geringer sind und das Handling der Reaktions­ stoffe stark vereinfacht wird.Another advantage of the method according to the invention compared to e.g. B. is driving with a spray absorber, that in the described method in contrast to semi-dry processes to no caking in the Reaction routes can come. It should also be considered that the transportation costs in the described method are much less and the handling of the reaction fabrics is greatly simplified.

Aufgrund der geringeren Mengenströme an Adsorptions­ mitteln werden so die zu bauenden Apparate kleiner und die Deponiemengen geringer.Because of the lower flows of adsorption this means that the apparatus to be built becomes smaller and the landfill quantities are lower.

Heute kostet die Deponie teilweise bis zu 200,- DM pro Tonne. Bei 50%iger Ersparnis der Restdeponie ist hier ein erheblicher weiterer Kostenvorteil zu sehen.Today the landfill sometimes costs up to DM 200 per ton. With 50% savings the remaining landfill is to see a significant further cost advantage here.

Claims (1)

Chemisorptionsmittel zur Beseitigung von sauren, gasförmigen Schadstoffen in Abgas hinter fossilen Verbrennungsanlagen, dadurch gekennzeichnet, daß die Trägermasse aus porösem Kalziumsilikat besteht, die mit Natronlauge/Natriumcarbonat getränkt ist.Chemisorbent for the removal of acidic, gaseous pollutants in exhaust gas behind fossil combustion plants, characterized in that the carrier mass consists of porous calcium silicate, which is impregnated with sodium hydroxide solution / sodium carbonate.
DE19873713600 1987-04-23 1987-04-23 Dry gas purification based on sodium with an alkaline support material Withdrawn DE3713600A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19873713600 DE3713600A1 (en) 1987-04-23 1987-04-23 Dry gas purification based on sodium with an alkaline support material
DE19873735245 DE3735245A1 (en) 1987-04-23 1987-10-17 Dry gas purification to remove acidic pollutants such as SO3, SO2, HF, HCl and NOx by means of alkali-impregnated lime/aluminium cement silicates as sorbents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873713600 DE3713600A1 (en) 1987-04-23 1987-04-23 Dry gas purification based on sodium with an alkaline support material

Publications (1)

Publication Number Publication Date
DE3713600A1 true DE3713600A1 (en) 1988-11-10

Family

ID=6326137

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873713600 Withdrawn DE3713600A1 (en) 1987-04-23 1987-04-23 Dry gas purification based on sodium with an alkaline support material

Country Status (1)

Country Link
DE (1) DE3713600A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998013138A1 (en) * 1996-09-27 1998-04-02 W.R. Grace & Co.-Conn Adsorbent compositions for odor removal
WO2003002452A1 (en) * 2001-06-26 2003-01-09 Johnson Matthey Plc Production of ammonia synthesis gas
WO2006071183A1 (en) * 2004-12-27 2006-07-06 Svenska Aerogel Ab Agglomerates of precipitated silica, method for their preparation and their use as filter medium in gas filtration
EP1716080B2 (en) † 2003-12-24 2015-02-11 S.A. Lhoist Recherche Et Developpement Powder composition based on a calcium/magnesium compound

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1217535B (en) * 1962-05-26 1966-05-26 Siemens Ag Process for removing sulfur oxides from hot flue gases
DE1289606B (en) * 1964-01-07 1969-02-20 Aquitaine Petrole Process for the desulphurization of exhaust gases
DE2459272A1 (en) * 1974-12-14 1976-06-16 Wegener Hermann Fa Filter for industrial waste gas purifn. - from sulphur cpds. and hydrogen halides based on calcined limestone, borate and silicate
DE2608935A1 (en) * 1975-05-06 1977-09-08 Heinz Hoelter Gas purificn. by addn. of absorbent - in series of stages with sepn. and recycling of absorbent after each stage
US4073864A (en) * 1971-11-22 1978-02-14 Mitsubishi Jukogyo Kabushiki Kaisha Method of desulfurizing exhaust emission using pulverized slag as absorbent
US4535072A (en) * 1982-09-14 1985-08-13 Nihon Sanso Kabushiki Kaisha Absorbent for treating gases containing the materials used for semiconductor products and process of treating such gases with the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1217535B (en) * 1962-05-26 1966-05-26 Siemens Ag Process for removing sulfur oxides from hot flue gases
DE1289606B (en) * 1964-01-07 1969-02-20 Aquitaine Petrole Process for the desulphurization of exhaust gases
US4073864A (en) * 1971-11-22 1978-02-14 Mitsubishi Jukogyo Kabushiki Kaisha Method of desulfurizing exhaust emission using pulverized slag as absorbent
DE2459272A1 (en) * 1974-12-14 1976-06-16 Wegener Hermann Fa Filter for industrial waste gas purifn. - from sulphur cpds. and hydrogen halides based on calcined limestone, borate and silicate
DE2608935A1 (en) * 1975-05-06 1977-09-08 Heinz Hoelter Gas purificn. by addn. of absorbent - in series of stages with sepn. and recycling of absorbent after each stage
US4535072A (en) * 1982-09-14 1985-08-13 Nihon Sanso Kabushiki Kaisha Absorbent for treating gases containing the materials used for semiconductor products and process of treating such gases with the same

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP 58 1 28 146 A. In: Patents Abstracts of Japan, C-191, Oct. 19, 1983, Vol.7, No. 235 *
US-PS 40 73 864 Abstract + A1, A3, A4 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998013138A1 (en) * 1996-09-27 1998-04-02 W.R. Grace & Co.-Conn Adsorbent compositions for odor removal
US5858909A (en) * 1996-09-27 1999-01-12 W. R. Grace & Co.-Conn. Siliceous oxide comprising an alkaline constituent
WO2003002452A1 (en) * 2001-06-26 2003-01-09 Johnson Matthey Plc Production of ammonia synthesis gas
US7431865B2 (en) 2001-06-26 2008-10-07 Johnson Matthey Plc Production of ammonia synthesis gas
EP1716080B2 (en) † 2003-12-24 2015-02-11 S.A. Lhoist Recherche Et Developpement Powder composition based on a calcium/magnesium compound
WO2006071183A1 (en) * 2004-12-27 2006-07-06 Svenska Aerogel Ab Agglomerates of precipitated silica, method for their preparation and their use as filter medium in gas filtration
US7736611B2 (en) 2004-12-27 2010-06-15 Svenska Aerogel Ab Agglomerates of precipitated silica, method for their preparation and their use as filter medium for gas filtration
CN101132856B (en) * 2004-12-27 2012-02-01 瑞典气凝胶有限公司 Agglomerates of precipitated silica, method for their preparation and their use as filter medium in gas filtration

Similar Documents

Publication Publication Date Title
EP0709128B1 (en) Process for the removal of mercury from a mercury containing gas
DE69921389T2 (en) Removal of NOx and SOx emissions from exhaust gases
DE3607929C2 (en)
DE2330234A1 (en) SORPTION AGENTS FOR THE REMOVAL OF NITROGEN OXYDE AND SULFUR OXYDE
DE2619145C3 (en) Process for separating nitrogen oxides or nitrogen oxides and sulfur oxides from exhaust gases
AT392909B (en) METHOD FOR TREATING SMOKE GAS WITH AN ALKALI INJECTION AND AN ELECTRON BEAM
DE3220403C1 (en) Process for removing acidic components and nitrogen oxides from exhaust gases
DD244075A5 (en) METHOD FOR THE CLEANING OF EXHAUST GASES DIRTED WITH DUST AND DAMAGE TO GAS
DE2432903A1 (en) PROCESS FOR SEPARATING SULFUR OXYDES AND NITROGEN OXYDES FROM COMBUSTION GASES
DE3713600A1 (en) Dry gas purification based on sodium with an alkaline support material
DD253574A5 (en) METHOD FOR THE WET DISSOLUTION OF FLUE GASES USING STEAM POWER PACKAGE SLUDGE
DE3318880A1 (en) Semi-dry flue gas desulphurisation having multi-stage use of chemisorption agent - preferably use of lime
EP2340885B1 (en) Method and assembly for cleaning waste gas
DE3536893C1 (en) Process for purifying flue gases of a furnace and apparatus for carrying out the process
EP0706815A2 (en) Process for mercury removal from fine gases resulting from the combustion of sewage sludge
DE3535172A1 (en) Process for regenerating carbon-containing adsorbents (adsorption agents)
EP0268094A2 (en) Process and device for purifying flue gases
DE19620720C1 (en) Exhaust gas desulphurising
AT393971B (en) Process for producing SO2-rich gases and apparatus for carrying out the process
CH602166A5 (en) Removing sulphur and its cpds. from waste combustion gas
DE2721587C2 (en)
EP0795350A1 (en) Process for the purification of exhaust gases containing S02
DE3308648A1 (en) Scrubbing liquid for scrubbing acidic gases such as SO2, HCl, HF, NOx etc.
AT382322B (en) Process for the sorption and chemical decomposition of polluting gases
DE2647520A1 (en) Iron oxide dust sorption agent - for removing pollutants from gases, e.g. hydrogen sulphide or sulphur dioxide

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8130 Withdrawal
AG Has addition no.

Ref country code: DE

Ref document number: 3735245

Format of ref document f/p: P