DE2519489A1 - Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate - Google Patents

Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate

Info

Publication number
DE2519489A1
DE2519489A1 DE19752519489 DE2519489A DE2519489A1 DE 2519489 A1 DE2519489 A1 DE 2519489A1 DE 19752519489 DE19752519489 DE 19752519489 DE 2519489 A DE2519489 A DE 2519489A DE 2519489 A1 DE2519489 A1 DE 2519489A1
Authority
DE
Germany
Prior art keywords
washing
sulfuric acid
fed
acids
aftertreatment
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.)
Pending
Application number
DE19752519489
Other languages
German (de)
Inventor
Heinz Gresch
Heinz Hoelter
Heinrich Igelbuescher
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 DE19752519489 priority Critical patent/DE2519489A1/en
Priority to AT639475A priority patent/AT356635B/en
Priority to GB34212/75A priority patent/GB1505281A/en
Priority to US05/606,785 priority patent/US4080428A/en
Priority to FR7526094A priority patent/FR2285170A1/en
Priority to NL7510250A priority patent/NL7510250A/en
Priority to BR7505565*A priority patent/BR7505565A/en
Priority to AU84432/75A priority patent/AU493917B2/en
Priority to BE2054540A priority patent/BE832940A/en
Priority to SE7509770A priority patent/SE423866B/en
Priority to CH1203075A priority patent/CH617867A5/de
Priority to DK419475A priority patent/DK419475A/en
Priority to JP50113519A priority patent/JPS5155778A/en
Publication of DE2519489A1 publication Critical patent/DE2519489A1/en
Priority to GB4849677A priority patent/GB1545175A/en
Priority to US05/855,268 priority patent/US4222993A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/464—Sulfates of Ca from gases containing sulfur 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
    • B01D53/14—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 by absorption
    • B01D53/1456—Removing acid components
    • 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
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treating Waste Gases (AREA)

Abstract

Method of purifying effluent gas e.g. smoke and other residual gases contg. SO2 where the gas is contacted with a washing liq. working in a closed cycle to which CaCO3, CaO, or Ca(OH)2 is added, to fix the SO2 and where the Ca cpd. formed is oxidised with atmospheric air to CaSO4 and sepd. from the closed cycle with the aid additives e.g. salts and/or acids which increase the removal of the Ca, is claimed in which the washing liq. is cleaned of solid particles prior to contact with teh gas. Incrustation of the washing plant with calcium carbonate is avoided while the atm. of SO2 absorbed is increased.

Description

Beschreibung und Erläuterung zur Patenta@@eiding 'Verfahren zur Herstellung von Gips nach SO2-Wasch-Verfahren, vorzugsweise Rauchgaswäscke binter Kraftwerken und Sinterstraßen' 5 st benannt, Abgase, die Isit SC und anderen Beleitern belastet sind, durch Wascheinrichtungen zu reinigen.Description and explanation of the patenta @@ eiding 'method of manufacture of gypsum using the SO2 scrubbing process, preferably flue gas scrubbing in power plants and Sinterstraßen '5 st named, exhaust gases polluted by Isit SC and other Beleitern are to be cleaned by washing facilities.

ielfach wird nach dem Waschverfahren durch Oxydation Sulfat hergestellt und anschließend durch Erhitzen Gips produziert.In many cases, sulfate is produced after the washing process by oxidation and then produced gypsum by heating.

Um einen möglichst sauberen Gips zu erstellen, wird vielfach eine Zweistufen-Reinigung vorgesehen. Diese Zweistufen-Reinigung kann dadurch gekennzeichnet sein, ar; in der ersten Stufe ein Trockenabscheider wie Siektrofilter oder dergleichen vorgesehen ist und dahinter die vorgesehene SO2-Waschung vorgenommen wird. In order to create the cleanest possible plaster of paris, a Two-stage cleaning provided. This two-stage cleaning can be characterized be, ar; in the first stage a dry separator such as a sieve filter or the like is provided and behind it the intended SO2 washing is carried out.

Selbstverständlich kann auch in der ersten stufe mit einer klaren sauren Waschwasserlösung gefahren werden, so daß der Staub dort aussewaschen wird, und in der zweiten Stufe wird dann die S02-Waschung durchgeführt.Of course, you can also use a clear in the first stage acidic washing water solution, so that the dust is washed out there, and in the second stage the SO2 washing is then carried out.

Bei aLlen Waschverfahren zeigt es sich, daß eine absolute Oxydation zu Sulfat mit vertretbaren technischen mitteln auf physikalischen Wege nicht möglich ist.In all washing processes it is found that an absolute oxidation to sulfate with justifiable technical means physically not possible is.

Aufgrur.d der neuen Umweltschutzbestimmungen müssen zahlreiche Kraftwerke und z.B. Sinterstraßen entschwefelt werden. Die jaßwascheinrichtungen mit Zielsetzung, Gips herzustellen, zeigen eine wirtschaftlich vertretbare Lösung, wenn der Gips wirklich verwendet werden kann. Vielfach wird jedoch gefordert, einen Reingips zu erstellen, der auch z.B. bei der Zementfabrikation als Zuschlagsstoff Anwendung finden soll.Due to the new environmental protection regulations, numerous power plants and e.g. desulfurization of sinter roads. The jass washing facilities with the aim of Making plaster of paris show an economically viable solution if the plaster of paris really can be used. In many cases, however, a plaster of paris is required which can also be used, for example, as an aggregate in cement production should find.

Um die Möglichkeit zu garantieren, einen Reingips herstellen zu können, wird erfindungsgemäß vorgeschlagen, nach der Gipsschliiabscheidung aus dem S02-Waschverfahren, die aus Sulfat und geringen Mengen Sulfit sowie freiem aranziumcarbonat besteht, der z.B. aus der C02-Auswaschung von Rauchgas herrührt, durch nachstehend erfindungsgemäße Merkmale einen Reingips herzustellen, der auch selbst für die Zement industrie Anwendung finden kann.In order to guarantee the possibility of being able to produce a plaster of paris, is proposed according to the invention, after the final gypsum deposition from the SO2 washing process, which consists of sulphate and small amounts of sulphite and free ammonium carbonate, resulting, for example, from the C02 scrubbing of flue gas, by the following invention Features of producing a pure plaster that can also be used in the cement industry Can be found.

Das erfindungsgemäße Verfahren ist gekennzeichnet dadurch, daß der ausgeschiedene Schlamm, wie obig beschrieben, einem Behälter zugefuhrt wird, in dem eine Nachbehandlung mit Schwefelsäure erfolgt.The inventive method is characterized in that the separated sludge, as described above, is fed into a container, in an aftertreatment with sulfuric acid takes place.

weiterhin ist es dienlich, erfindungsgemäß während der nachbehandlung mit Schwefelsäure eine Lufteinblasung zum guten Durchmischen und Austreiben von Restbeständen wie GO2, 502 und m;°x zu bewirken, die in einer Nachbehandlungsstufe aufgenommen und vernichtet werden können.it is also useful, according to the invention, during the aftertreatment with sulfuric acid an air injection for thorough mixing and expulsion of Remnants such as GO2, 502 and m; ° x to effect that in a post-treatment stage can be absorbed and destroyed.

lacn dieser erfindungsgemäßen Verfahrenstechnik wird der reststoff z.B. über einen Feststoff-Flüssigkeitstrenner, wie z.B. Zentrifuge oder Trommelvakuumfilter, ausgetragen und zur thermischen Nachbehandlung zu Keingips den weiteren Verfahrensschritt zugeführt Es ist zweckdienlich, die Schwefelsäurebehandlung entsprechend der Waschflüssigkeitsverhältnisse in verschiedenen Konzentrationsdichten äurchzuführen, vorzugsweise bei den üblichen z.Zt. bekannten SO2-Rauchgaswaschanlagen hinter Kraftwerken in einer Konzentrationsverdünnung von einen til Schwefel und zwei Teilen Wasser.In this process technology according to the invention, the residual material becomes e.g. via a solid-liquid separator, such as a centrifuge or drum vacuum filter, discharged and the further process step for thermal aftertreatment to give free plaster It is advisable to carry out the sulfuric acid treatment according to the washing liquid ratios to be carried out in different concentration densities, preferably with the usual ones currently known SO2 flue gas scrubbing systems behind power plants in a concentration dilution one part sulfur and two parts water.

Selbstverständlich ist die Erfindung nicht auf die vorstehend im einzelnen beschriebenen und dargestellten Ausbildungsformen beschränkt, sondern es sind zahlreiche Abänderungen möglich, ohne jedoch von dem Grundgedanken abzuweichen. Rückstände aus SO2-Waschanlagen, vorzugsweise hinter Kraftwerken und Sinterstraßen so zu behandeln, daß sie mit Schwefelsäure, vorzugsweise in verdünnter Form, die gies-verunreinigenden, unerwünschten Stoffe mittels Zugabe von Luft und Schwefel saure aus dem Rückstand austreiben oder angereichert mit der verbleibenden Restflüssigk:fQ aus dem Flüssigkeits-Feststoff-Trenner in den Kreislauf zurückgeführt werden.Of course, the invention is not limited to the above in detail training forms described and illustrated are limited, but there are numerous Changes possible without deviating from the basic idea. Residues from SO2 washing plants, preferably behind power plants and sintering lines, to be treated in such a way that with sulfuric acid, preferably in diluted form, the cast-contaminating, unwanted substances by adding air and sulfuric acid from the residue drive out or enriched with the remaining liquid from the liquid-solid separator be returned to the cycle.

P a t e n t a n s p r ü c h e: P a t e n t a n s p r ü c h e:

Claims (1)

Patentansrüche: anspruch 1: Verfahren zur Herstellung von is nach S02-Wasch-Verfahren, vorzugsweise Rauchgaswäsche hinter Kraftwerken und Sinterstraßen, d a d u r c h g e k e n n z e i c h n e t, daß die schlammartige Schmutzgipsmasse aus dem Waschverfahren einem Nachbehandlungs-Verfahrens-Aggregat zugeführt wird, in dem der Schmutzgipsräckstand mit Schwefelsäure nachbehandelt wird.Claims: Claim 1: Process for the production of is according to S02 scrubbing process, preferably flue gas scrubbing behind power plants and sintering lines, d u r c h e k e n n n z e i c h n e t that the mud-like dirt gypsum mass is fed from the washing process to a post-treatment process unit, in which the plaster of paris residue is treated with sulfuric acid. Anspruch 2: ach aspruch 1 dadurch gekennzeichnet, daß in den Nachbehandlungsverfahrensweg Luft eingeblasen wird.Claim 2: after claim 1, characterized in that in the aftertreatment method Air is blown in. snswruch 7: Nach Anspruch 1 und 2 dadurch gekennzeichnet, daß zur besseren Umsetzung im Verfahrensweg zusätzlich Rührwerke eingeschaltet sind.snswruch 7: According to claim 1 and 2 characterized in that for In addition, agitators are switched on for better implementation in the process path. Anspruch 4: Nach Anspruch 1 3 5 dadurch gekennzeichnet, daß die durch die chemische Nachbehandlung ausgetriebenen Abgase aus dem erfindungsgemäßen Verfahrensschritt in einer besonderen iachbehandlungc:stufe oder aber der SO2-Absauganlage zugeführt werden.Claim 4: According to claim 1 3 5 characterized in that the through the chemical aftertreatment of expelled exhaust gases from the process step according to the invention in a special post-treatment stage or fed to the SO2 extraction system will. Anspruch 5: Nach aspruch 1 - 4 dadurch gekennzeichnet, daß die Schwefelsäure-Flüssigkeit, die zufr Nachbehandlung benutzt wird, nach dem Feststoff-Flüssigkeitstrenner wieder dem Nachbehandlungs-Waschflüssigkeits-Kreislau zugeführt wird.Claim 5: According to claim 1 - 4, characterized in that the sulfuric acid liquid, which is used for post-treatment, after the solid-liquid separator again is fed to the aftertreatment washing liquid circuit. Anspruch 6: Nach Anspruch 1 - 5 dadurch gekennzeichnet, daß die erforderliche Konzentration der Schwefelsäure und der Lufteinblasung in Abhängigkeit vom vorgeschalteten Waschverfahren und der daraus resultierenden Gipsschlammrückstände individuell zudosiert wird.Claim 6: According to claim 1-5, characterized in that the required Concentration of sulfuric acid and air injection depending on the upstream Washing process and the resulting gypsum sludge residues are individually dosed will.
DE19752519489 1974-09-19 1975-05-02 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate Pending DE2519489A1 (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
DE19752519489 DE2519489A1 (en) 1975-05-02 1975-05-02 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate
AT639475A AT356635B (en) 1974-09-19 1975-08-18 METHOD AND DEVICE FOR PURIFYING SMOKE GASES AND OTHER EXHAUST GASES CONTAINING SULFUR DIOXIDE
GB34212/75A GB1505281A (en) 1974-09-19 1975-08-18 Process and apparatus for the purification of flue and other waste gas
US05/606,785 US4080428A (en) 1974-09-19 1975-08-22 Process for the purification of flue and other waste gas
FR7526094A FR2285170A1 (en) 1974-09-19 1975-08-22 PROCESS AND DEVICE FOR PURIFYING FUME GASES AND OTHER WASTE GASES CONTAINING SULPHUROUS ANHYDRIDE
NL7510250A NL7510250A (en) 1974-09-19 1975-08-29 METHOD AND EQUIPMENT FOR THE PURIFICATION OF SMOKE GASES AND OTHER EXHAUST GASES CONTAINING SULFUR DIOXIDE.
BR7505565*A BR7505565A (en) 1974-09-19 1975-08-29 PROCESS AND APPARATUS FOR PURIFYING SMOKE GASES AND OTHER EXHAUST GASES CONTAINING SULPHURUS ANHYDRATE
AU84432/75A AU493917B2 (en) 1975-09-01 Improvements in or relating to process and apparatus forthe purification of flue andother waste gas
BE2054540A BE832940A (en) 1974-09-19 1975-09-01 PROCESS AND DEVICE FOR PURIFYING FUME GASES AND OTHER WASTE GASES CONTAINING SULPHUROUS ANHYDRIDE
SE7509770A SE423866B (en) 1974-09-19 1975-09-03 VIEW TO CLEAN Sulfur Dioxide-containing Smoke and Other Exhausts WHEN THE GAS IS CONTACTED WITH LAUNDRY FLUID AND DEVICE FOR IMPLEMENTATION OF THE PROCEDURE
CH1203075A CH617867A5 (en) 1974-09-19 1975-09-17
DK419475A DK419475A (en) 1974-09-19 1975-09-18 PROCEDURE AND APPARATUS FOR CLEANING GAS GAS AND OTHER EXHAUST GASES CONTAINING SULFUR DIOXIDE
JP50113519A JPS5155778A (en) 1974-09-19 1975-09-19 Haigasuoyobi nisankaioo fukumu sonotano gasuojokasuruhohooyobi sochi
GB4849677A GB1545175A (en) 1974-09-19 1977-11-22 Removal of noxious contaminants from gas
US05/855,268 US4222993A (en) 1974-09-19 1977-11-28 Removal of noxious contaminants from gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752519489 DE2519489A1 (en) 1975-05-02 1975-05-02 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate

Publications (1)

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DE2519489A1 true DE2519489A1 (en) 1976-11-18

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DE19752519489 Pending DE2519489A1 (en) 1974-09-19 1975-05-02 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129878A1 (en) * 1981-07-29 1983-03-10 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen "Process for producing gypsum"
AT386593B (en) * 1982-10-30 1988-09-12 Bischoff Gasreinigung METHOD FOR PRODUCING CALCIUM SULFATE DIHYDRATE AND, IF NECESSARY, ALPHA HALBHYDRATE
AT391465B (en) * 1986-08-26 1990-10-10 Donau Chemie Ag Method of processing chloride-rich flue gas desulphurization material (FGD material) to produce cement clinker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3129878A1 (en) * 1981-07-29 1983-03-10 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen "Process for producing gypsum"
AT386593B (en) * 1982-10-30 1988-09-12 Bischoff Gasreinigung METHOD FOR PRODUCING CALCIUM SULFATE DIHYDRATE AND, IF NECESSARY, ALPHA HALBHYDRATE
AT391465B (en) * 1986-08-26 1990-10-10 Donau Chemie Ag Method of processing chloride-rich flue gas desulphurization material (FGD material) to produce cement clinker

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