DE2511140A1 - 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
DE2511140A1
DE2511140A1 DE19752511140 DE2511140A DE2511140A1 DE 2511140 A1 DE2511140 A1 DE 2511140A1 DE 19752511140 DE19752511140 DE 19752511140 DE 2511140 A DE2511140 A DE 2511140A DE 2511140 A1 DE2511140 A1 DE 2511140A1
Authority
DE
Germany
Prior art keywords
calcium
washing
acids
washing liquid
calcium carbonate
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.)
Ceased
Application number
DE19752511140
Other languages
German (de)
Inventor
Heinz Gresch
Heinz Hoelter
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
Priority claimed from DE19742415693 external-priority patent/DE2415693B2/en
Priority claimed from DE19742444781 external-priority patent/DE2444781A1/en
Priority to DE19752511140 priority Critical patent/DE2511140A1/en
Application filed by Individual filed Critical Individual
Priority to AT639475A priority patent/AT356635B/en
Priority to GB34212/75A priority patent/GB1505281A/en
Priority to FR7526094A priority patent/FR2285170A1/en
Priority to US05/606,785 priority patent/US4080428A/en
Priority to BR7505565*A priority patent/BR7505565A/en
Priority to NL7510250A priority patent/NL7510250A/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 IT2735575A priority patent/IT1042642B/en
Priority to JP50113519A priority patent/JPS5155778A/en
Publication of DE2511140A1 publication Critical patent/DE2511140A1/en
Priority to GB4849677A priority patent/GB1545175A/en
Priority to US05/855,268 priority patent/US4222993A/en
Ceased legal-status Critical Current

Links

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
    • B01D53/14—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
    • 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
    • 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

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 Zusatzpatentanmeldung ~Verfahren zur Waschung von Rauchgasen, die mit S02, Fluor usw. belastet sind, mit einer Waschflüssigkeit, die mit Ammonium-Verbindungen der Ameisensäure angereichert ist" Zusatzpatentanmeldung zur Anmeldung P 24 44 781.2 In der Anmeldung P 2 44 781.2 wird erfindungsgemäß vorgeschlagen, daß zu der im Kreislauf geführten Waschflüssigkeit Calciumoxid und karbonatzerstörende Impfstoffe wie alle Ionen der Halogengruppe sowie alle Anionen, Komplexverbindungen und Verbindungen organischer und anorganischer Art zum Einsatz kommen, die mit Calciumionen wasserlösliche Verbindungen bilden und sich bei Anwesenheit von schwefeliger Säure im neutralen oder schwach sauren Medium gegen S02-Ionen austauschen lassen und im alkalischen Medium die wasserlöslichen Calciumverbindungen zurückbilden, wobei gewählt werden 1) Ionen der Halogengruppe 2) Ionen der Karbonsäure 3) Ionen der Salze und Säuren des Stickstoffs und Phosphor usw.Description and explanation of the additional patent application process for scrubbing flue gases that are contaminated with SO2, fluorine etc. with a scrubbing liquid, which is enriched with ammonium compounds of formic acid "additional patent application to application P 24 44 781.2 In application P 2 44 781.2 it is proposed according to the invention that that to the circulating washing liquid calcium oxide and carbonate-destroying Vaccines like all ions of the halogen group, as well as all anions, complex compounds and compounds of organic and inorganic nature are used, those with calcium ions Water-soluble compounds form and dissolve in the presence of sulphurous acid can be exchanged for S02 ions in a neutral or weakly acidic medium and im alkaline medium rebuild the water-soluble calcium compounds, whereby selected 1) Ions of the halogen group 2) Ions of the carboxylic acid 3) Ions of the salts and Acids of nitrogen and phosphorus, etc.

Erfindungsgemäß wird ergänzend dazu vorgeschlagen, daß zur Verbesserung der Absorption der Schadstoffbegleiter im Rauchgas, wie S02 usw., eine Waschflüssigkeit benutzt wird, die im Kreislauf gefahren und mit Ammonium-Verbindungen der Ameisensäure angereichert ist, und hierdurch eine wesentliche Absenkung der spezifischen Waschwassermenge bewirkt, wodurch 1) eine wesentliche Ernergieeinsparung, bezogen auf Pumpen-und Ventilatorleistung erzielt wird und 2) die Vorrichtung zur Durchführung des Verfahrens, insbesondere bezogen auf die #lüssigkeitsbehalter, wesentlich reduziert werden kann, und trotzdem Inkrustationen absolut vermieden werden, da die der gaschflüssigkeit beigegebenen Impfstoffe hoch aktiv sind und eine hohe Wasserlöslichkeit besitzen.According to the invention it is additionally proposed that for improvement the absorption of the pollutants in the flue gas, such as S02 etc., a scrubbing liquid is used, which is driven in the circuit and with ammonium compounds of formic acid is enriched, and thereby a significant reduction in the specific amount of wash water causes whereby 1) a substantial energy saving, related on pump and fan power is achieved and 2) the device for performing of the process, especially with regard to the liquid container, is significantly reduced can be, and nevertheless incrustations are absolutely avoided, since that of the gas liquid added vaccines are highly active and have a high water solubility.

Das Endprodukt dieses erfindungsgemäßen Waschverfahrens ist Calciumsulfat, das durch Aufbrennen zu Gips weiter verarbeitet werden kann.The end product of this washing process according to the invention is calcium sulfate, which can be further processed into plaster of paris by burning on.

In der beiliegenden Zeichnung ist das Verfahren dargestellt.The procedure is shown in the accompanying drawing.

Mit 1: Rohgas Mit 2: Waschflüssigkeit mit einem pH-Wert erfindungsgemäß vorzugsweise kleiner 7 Mit 3: Wäscher Mit 4: Ventilator Mit 5: Ablaufende Waschflüssigkeit mit einem pH-Wert erfindungsgemäß kleiner 5 Mit 6: Luftkompressoranlage zur Belüftung des Abtauchbehälter (7) und der Oxidationsvorrichtung (8) Mit 7: Im Abtauchbehälter wird durch die Belüftung C02 ausgetrieben Mit 8: In der Oxidationsvorrichtung wird CaO zugegeben und die Oxidation durchgeführt, die mit ihrer Suspension in den 9: Sinkabscheider eingeleitet wird, und die Feststoffe über 10: die Zentrifuge ausgetragen werden. Die Waschflüssigkeit wird durch die 2: Pumpe dem Kreislauf wieder zugeführt.With 1: raw gas With 2: washing liquid with a pH value according to the invention preferably less than 7 With 3: Washer With 4: Fan With 5: Washing liquid draining off with a pH value of less than 5 according to the invention. With 6: Air compressor system for ventilation of the immersion tank (7) and the oxidation device (8) With 7: In the immersion tank is expelled by the aeration C02 With 8: In the oxidizer is CaO was added and the oxidation carried out, which was carried out with its suspension in the 9: Sink separator is introduced, and the solids via 10: the centrifuge is discharged will. The washing liquid is fed back into the circuit by the 2: pump.

Weiterhin darf erfindungsgemäß ausgeführt werden, daß durch die stark gepufferte Waschflüssigkeit und durch den besonderen Charakter der Ameisensäure ein Inhibitor gegen Korrosion aebildet ist, so daß nicht, wie bei vielen S02-Waschverfahre) die gesamte Vorrichtung zur Durchführung des Verfahrens gegen Korrosion sehr aufwendig durch Edelstähle und zusätzlichen Korrosionsschutz, wie Kunststoff- und Gummi-Beschichtungen, durchgeführt werden muß.Furthermore, it may be carried out according to the invention that by the strong buffered washing liquid and the special character of formic acid an inhibitor against corrosion is formed, so that not, as with many S02 washing processes) the entire device for carrying out the method against corrosion is very expensive through stainless steels and additional corrosion protection, such as plastic and rubber coatings, must be carried out.

Patentansprüche:Patent claims:

Claims (1)

Patentansprüche: Anspruch 1: Verfahren zur Waschung von Rauchgasen, die mit SO2, Fluor und ähnlichen Schadstoffen angereichert sind, dadurch gekennzeichnet, daß die Waschflüssigkeit mit Ammonium-Verbindungen der Ameisensäure angereichert ist.Claims: Claim 1: Process for scrubbing flue gases, which are enriched with SO2, fluorine and similar pollutants, characterized by that the washing liquid is enriched with ammonium compounds of formic acid is. Anspruch 2= Die Waschflüssigkeit besteht vorzugsweise aus mit Ammoniumhydroxid neutralisierter Ameisensäure.Claim 2 = The washing liquid preferably consists of ammonium hydroxide neutralized formic acid. Anspruch 3: Verfahren nach Anspruch 1 dadurch gekennzeichnet, daß die SO2-Waschung vorzugsweise im pH-Wert-Bereich unter 7 liegt.Claim 3: The method according to claim 1, characterized in that the SO2 washing is preferably in the pH range below 7. Anspruch 4: Verfahren dadurch gekennzeichnet, daß die Waschflüssigkeit als Inhibitor gegen Korrosion wirkt.Claim 4: Method characterized in that the washing liquid acts as an inhibitor against corrosion. Anspruch 5: Verfahren dadurch gekennzeichnet, daß die der Waschflüssigkeit beigegebenen Zuschläge hoch aktiv sind, eine hohe Wasserlöslichkeit besitzen und damit die spezifische Wassermenge gegenüber bekannten Waschverfahren wesentlich herabsetzen.Claim 5: Method characterized in that the washing liquid added additives are highly active, have a high water solubility and thus the specific amount of water compared to known washing processes is significant reduce.
DE19752511140 1974-04-01 1975-03-14 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate Ceased DE2511140A1 (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
DE19752511140 DE2511140A1 (en) 1974-04-01 1975-03-14 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
FR7526094A FR2285170A1 (en) 1974-09-19 1975-08-22 PROCESS AND DEVICE FOR PURIFYING FUME GASES AND OTHER WASTE GASES CONTAINING SULPHUROUS ANHYDRIDE
US05/606,785 US4080428A (en) 1974-09-19 1975-08-22 Process for the purification of flue and other waste gas
BR7505565*A BR7505565A (en) 1974-09-19 1975-08-29 PROCESS AND APPARATUS FOR PURIFYING SMOKE GASES AND OTHER EXHAUST GASES CONTAINING SULPHURUS ANHYDRATE
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.
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
IT2735575A IT1042642B (en) 1974-09-19 1975-09-18 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate
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 (3)

Application Number Priority Date Filing Date Title
DE19742415693 DE2415693B2 (en) 1974-04-01 1974-04-01 Process for cleaning flue gases or other gases
DE19742444781 DE2444781A1 (en) 1974-04-01 1974-09-19 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate
DE19752511140 DE2511140A1 (en) 1974-04-01 1975-03-14 Gas purification to remote sulphur dioxide - with calcium cpds in presence of sulphuric and other acids to prevent deposition of calcium carbonate

Publications (1)

Publication Number Publication Date
DE2511140A1 true DE2511140A1 (en) 1976-09-30

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DE19752511140 Ceased DE2511140A1 (en) 1974-04-01 1975-03-14 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3313496A1 (en) * 1983-04-14 1984-10-18 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Semi-dry flue gas desulphurisation process, preferably for fossil fuel power stations

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2405968A1 (en) * 1973-02-10 1974-08-22 Kureha Chemical Ind Co Ltd METHOD FOR REMOVING SULFUR DIOXIDE FROM COMBUSTION GAS
DE2327967A1 (en) * 1973-05-10 1974-12-19 Heinz Hoelter METHODS FOR SEPARATING DUST, SO DEEP 2, FLUORINE AND SIMILAR POLLUTANTS FROM SMOKE GASES

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2405968A1 (en) * 1973-02-10 1974-08-22 Kureha Chemical Ind Co Ltd METHOD FOR REMOVING SULFUR DIOXIDE FROM COMBUSTION GAS
DE2327967A1 (en) * 1973-05-10 1974-12-19 Heinz Hoelter METHODS FOR SEPARATING DUST, SO DEEP 2, FLUORINE AND SIMILAR POLLUTANTS FROM SMOKE GASES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3313496A1 (en) * 1983-04-14 1984-10-18 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Semi-dry flue gas desulphurisation process, preferably for fossil fuel power stations

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