SU910110A3 - Process for purifying off gases from sulphur oxides - Google Patents
Process for purifying off gases from sulphur oxides Download PDFInfo
- Publication number
- SU910110A3 SU910110A3 SU721846670A SU1846670A SU910110A3 SU 910110 A3 SU910110 A3 SU 910110A3 SU 721846670 A SU721846670 A SU 721846670A SU 1846670 A SU1846670 A SU 1846670A SU 910110 A3 SU910110 A3 SU 910110A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- slag
- gases
- suspension
- aqueous suspension
- nov
- Prior art date
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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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
Изобретение относитс к способам очистки отход щих газов от окислов серы к может найти применение в химической и металлургической промышленности. Известен способ поглощени двуокиси серы из дымовых газов путем пропускани их через водную суспензию с рН 89 тонкоизмепьченного кремнистого веще ства, например шлака из плавильной пег чи fl. Недостатком известного способа вл етс низка поглотительна емкость суспензии , так как поглощенный сернистый ангидрид офааует в водной среде сернистую кислоту, котора практически не вза моаеЪапвует с компонентами суспензии и не окисл етс до серной. Равновесное дан вление О над раствором, сернистой кислоты достигает 1ООО ч/млн, при рН 4 н процесс поглощени S О из отход щих газов прекращаетс при содержании в газе р,1%- 90.. Известен также способ очистки отход щих газов от окислов серы погло(це1 ем их водной суспензией известн ка (иэвестковый метод) прч рН менее 6,. Недостаток данного способа св зал с недостаточной скоростью окислени получаемого при поглощении . сульфата кальци в сульфат, что ограничивает поглотительную емкость суспензии и увеличивает обьем циркулирующей в системе псаплотительной суспензии. При этом усложн етс также аппаратурное оформление процесса. Цель иаофетени - упрощение процесса при одновременном получении в качестве товарного продукта сульфата кальци . Указанна цель достигаетс тем, что поглощение окислов серы осуществл етс водными, суспензи ми доменных или конверторных или мартеновских шлаков при рН суспензии 1,5-4,О . Высока скс иэсть окислени сернистой кислоты в серную обеспечиваетс благодар каталитическому действию г;шнозема и 1фемнезема, получаемых при разложенииThe invention relates to methods for purifying waste gases from sulfur oxides to can be used in the chemical and metallurgical industries. A known method for the absorption of sulfur dioxide from flue gases is by passing them through an aqueous suspension with a pH of 89 finely divided siliceous material, for example, slag from the melting point fl. The disadvantage of this method is the low absorptive capacity of the suspension, since the absorbed sulfur dioxide in the aqueous medium contains sulfuric acid, which absorbs almost no components of the suspension and is not oxidized to sulfuric acid. The equilibrium data of O over the solution, sulfuric acid reaches 1OOO ppm, at pH 4 n, the process of absorbing S O from the exhaust gases is stopped when the content in the gas is p, 1% - 90 .. There is also a known method for cleaning the exhaust gases from sulfur oxides absorbed (due to their aqueous suspension of limestone (iesvest) method) pH less than 6. The disadvantage of this method is due to the insufficient oxidation rate of calcium sulfate obtained in the absorption of sulfate, which limits the absorptive capacity of the suspension and increases the volume circulating in the system ps This also complicates the instrumentation of the process. The purpose of iaofetenia is to simplify the process while simultaneously obtaining calcium sulfate as a commercial product. This goal is achieved by absorbing sulfur oxides by aqueous, suspension of domain or converter or open-hearth slag at pH suspension 1.5-4, O. Highly scS and the oxidation of sulfurous acid to sulfuric acid is ensured by the catalytic action of grains and earths produced during the decomposition
дэо&.ой соли Caj AgjOu вл ющейс основным компонентом шлака. Офааующа с в процессе серна кислота взаимодействует с окисью алюмини и расходуетс на дальнейшее разложение шпака. При этом рН поглотителлой суспензии поддерживаетс в пределах 1,5-4,0, что обеспечивает BI сокую степень очистки газов от 50 и одновременно вьюоиую степень извлечени из шлака калыш с офазованием сульфата кальци , получаемого в процессе в качестве побочного товарного продукта.The caustic salt of Caj AgjOu, which is the main component of the slag. In the course of the process, sulfuric acid reacts with alumina and is consumed for the further decomposition of the bacon. At the same time, the pH of the absorbing suspension is maintained in the range of 1.5-4.0, which provides BI with a low degree of gas purification from 50 and at the same time view the extraction of slag from the slag, with calcium sulphate obtained in the process as a by-product.
Пример. Отход щие газы в кол честве 2ООО , имекшие состав,%: 902. 0,07; Од. 10; СОа. 7; в .74,93, при 55 С ввод т в насдцочный абсорбер, орошаемый водной суспензией доменного шлака, имеющего в CBO-I ем составе,%: 6iO2.33,7; ,7 AEiO 15,9Г Т 1 02. 1,4; МИО 0,4; СаО 39,9; М 3,7.Example. Exhaust gases in the amount of 2OOO, which had composition,%: 902. 0.07; Odd ten; Soa. 7; v.79.93, at 55 ° C, is introduced into the work absorber, irrigated with an aqueous suspension of blast-furnace slag, which has a composition in the CBO-I,%: 6iO2.33,7; , 7 AEiO 15.9 G T 1 02. 1.4; MIO 0.4; CaO 39.9; M 3.7.
Средний размер частиц шлака в суспензии равен 6О мкм. Значение рН суспензии поддерживают равным 3 регулированием концентрации шлака в суспен- зии, котора равн етс около 6 вес.%.The average particle size of the slag in the suspension is 6O microns The pH of the suspension is maintained at 3 by adjusting the concentration of slag in the suspension, which is about 6% by weight.
Степень поглощени gOj составл ет 9О%.The degree of absorption gOj is 9O%.
В составе осадка, выделенного из обработанной суспензии, содержитс 67,2% сульфата кальци .The precipitate recovered from the treated suspension contains 67.2% calcium sulfate.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP46093978A JPS4857887A (en) | 1971-11-22 | 1971-11-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
SU910110A3 true SU910110A3 (en) | 1982-02-28 |
Family
ID=14097474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU721846670A SU910110A3 (en) | 1971-11-22 | 1972-11-17 | Process for purifying off gases from sulphur oxides |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS4857887A (en) |
FR (1) | FR2160986B1 (en) |
GB (1) | GB1407028A (en) |
IT (1) | IT983211B (en) |
SU (1) | SU910110A3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2802622C1 (en) * | 2022-12-09 | 2023-08-30 | Федеральное государственное автономное образовательное учреждение высшего образования "Северо-Восточный федеральный университет имени М.К. Аммосова" | Method for cleaning flue gases from acidic components |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5420955B2 (en) * | 1973-11-01 | 1979-07-26 | ||
JPS51138595A (en) * | 1975-05-27 | 1976-11-30 | Nippon Steel Corp | Rec overy of gypsum from exhausted gas by wet process |
JPS51142481A (en) * | 1975-08-04 | 1976-12-08 | Japan Metals & Chem Co Ltd | A process for desulfurization of exhaust gas |
JPS5244773A (en) * | 1975-10-06 | 1977-04-08 | Nippon Light Metal Co Ltd | Desulfurization method of flue gas by using red mud slurry |
JPS5948133B2 (en) * | 1976-02-06 | 1984-11-24 | 新日本製鐵株式会社 | Wet flue gas desulfurization method using slag |
JPS52138079A (en) * | 1976-05-14 | 1977-11-17 | Nippon Steel Corp | Desulfurization of exhaust gas from sintering furnace |
JPS531171A (en) * | 1976-06-10 | 1978-01-07 | Chiyoda Chem Eng & Constr Co Ltd | Removal of sulfur oxides in exhaust gas |
JPS5360880A (en) * | 1976-11-12 | 1978-05-31 | Nippon Steel Corp | Wet desulfurizing method for exhaust gas by use of slag |
JPS5821162B2 (en) * | 1976-12-15 | 1983-04-27 | 三菱重工業株式会社 | Fluid combustion method |
JPS54139877A (en) * | 1978-04-21 | 1979-10-30 | Nippon Sheet Glass Co Ltd | Waste gas desulfurization |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE593383C (en) * | 1931-10-02 | 1934-02-24 | Metallgesellschaft Ag | Process for removing sulfur dioxide from gases containing such |
JPS5242547A (en) * | 1975-10-02 | 1977-04-02 | Asahi Chem Ind Co Ltd | Flame-retarded polyamide compositions with improved properties |
-
1971
- 1971-11-22 JP JP46093978A patent/JPS4857887A/ja active Pending
-
1972
- 1972-11-17 SU SU721846670A patent/SU910110A3/en active
- 1972-11-21 IT IT5416772A patent/IT983211B/en active
- 1972-11-22 FR FR7241558A patent/FR2160986B1/fr not_active Expired
- 1972-11-22 GB GB5400572A patent/GB1407028A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2802622C1 (en) * | 2022-12-09 | 2023-08-30 | Федеральное государственное автономное образовательное учреждение высшего образования "Северо-Восточный федеральный университет имени М.К. Аммосова" | Method for cleaning flue gases from acidic components |
Also Published As
Publication number | Publication date |
---|---|
IT983211B (en) | 1974-10-31 |
GB1407028A (en) | 1975-09-24 |
DE2257798A1 (en) | 1973-06-07 |
FR2160986B1 (en) | 1976-10-29 |
FR2160986A1 (en) | 1973-07-06 |
JPS4857887A (en) | 1973-08-14 |
DE2257798B2 (en) | 1977-05-18 |
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