CN102828203A - Method for purifying flue gas in aluminum electrolysis production - Google Patents
Method for purifying flue gas in aluminum electrolysis production Download PDFInfo
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- CN102828203A CN102828203A CN2012102983408A CN201210298340A CN102828203A CN 102828203 A CN102828203 A CN 102828203A CN 2012102983408 A CN2012102983408 A CN 2012102983408A CN 201210298340 A CN201210298340 A CN 201210298340A CN 102828203 A CN102828203 A CN 102828203A
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- flue gas
- gas
- aluminum electrolysis
- electrolysis
- fluorochemical
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Abstract
The invention discloses a method for purifying flue gas in aluminum electrolysis production. The method comprises the following steps of 1, carrying primary dry purification treatment on flue gas produced in aluminum electrolysis production to remove HF and fluorides in the flue gas by filtration, and 2, by a secondary filtration layer stacked loosely, absorbing residual HF and fluorides in the flue gas and simultaneously absorbing CO2, SO2 and a part of POH and fluorocarbons in the flue gas so that gas in an electrolytic cell is further purified. The method provided by the invention solves the problem that large amounts of harmful gas such as CO2, SO2 and fluorocarbons continually diffused out of an electrolytic cell can not be treated thoroughly so that environmental pollution is caused, utilizes industrial waste such as carbide slag and magnesium slag, and realizes a minimum cost of storage and fixation of greenhouse gas such as CO2 and SO2.
Description
Technical field
The present invention relates to a kind of method of gas cleaning, particularly relate to the method for gas cleaning in a kind of aluminum electrolysis.
Background technology
In the aluminum electrolysis process, constantly outwards give out a large amount of CO in the electrolyzer
2, SO
2, obnoxious flavour and dust particle such as fluorochemical.The flue gas purification system of current electrolysis aluminium manufacturer adopts canalization dry cleaning technology; Its principle is to utilize aluminum oxide that gaseous hydrogen fluoride is had this characteristic of stronger adsorptive power, and raw materials for production-aluminum oxide of directly using electrolysis of aluminum is as sorbent material, the obnoxious flavoures such as hydrogen fluoride in the Al adsorption electrolysis flue gas; In two abundant contact processes of gas-solid; The absorption of the oxidized aluminium of hydrogen fluoride, the dust that brings out in reacted aluminum oxide and the electrolyzer gets into combination sack cleaner that parallel connection disposes respectively through smoke pipe and is filtered and separates; The fluoro-containing alumina that reclaims can return and continue in the electrolyzer to produce to use, and purifies the back flue gas and sends into the chimney emptying through smoke exhaust fan.Electrolysis of aluminum dry method technological process for flue gas purification; Large-scale pre-baked cell adopts noxious flue gas dry cleanings such as alumina adsorption hydrogen fluoride; Technology maturation; Ton aluminium processing costs and working cost are low, can realize the requirement of pollutent qualified discharge and overall control, solve electrolyzer row fluoride pollution problem in the aluminium production process comparatively up hill and dale.Constantly outwards give out a large amount of CO in the electrolyzer
2, SO
2, obnoxious flavour such as POH, fluorocarbon can't be administered completely.
Summary of the invention
The object of the present invention is to provide the method for gas cleaning in a kind of aluminum electrolysis, filter out HF and fluorochemical in the flue gas, absorb the CO in the flue gas
2, SO
2, and part fluorocarbon and dust, the further gas in the purifying electrolysis groove.Cost with minimum is realized CO
2, SO
2The storage of isothermal chamber gas and fixing.Solve obnoxious flavoures such as fluorocarbon and dust and can not be administered the difficult problem of contaminate environment completely.
The objective of the invention is to realize through following technical scheme:
The method of gas cleaning in the aluminum electrolysis; Said method comprises following process: after flue gas is handled through a dry purification in the aluminum electrolysis; Filter out HF and fluorochemical in most of flue gas; And then do not adsorb HF and fluorochemical completely in the secondary filtration layer absorption flue gas through loose accumulation, absorb the CO in the flue gas
2, SO
2, and part fluorocarbon and dust, the further gas in the purifying electrolysis groove.
The method of gas cleaning in the described aluminum electrolysis after flue gas is handled through a dry purification in the said aluminum electrolysis, is not adsorbed HF and fluorochemical completely through the secondary filtration layer filtration of loose accumulation again, and is absorbed the CO in the flue gas
2, SO
2, part fluorocarbon and dust, the material in the secondary filtration layer is carbide slag or is called calcium carbide mud or cobbler's method is practiced the magnesium slag that forms in the magnesium process and the combination of carbide slag and magnesium slag.
The method of gas cleaning in the described aluminum electrolysis, the water cut of material is 0.5-40wt% in the said secondary filtration layer.
Advantage of the present invention and effect are:
After flue gas is handled through a dry purification in the aluminum electrolysis, filter out HF and fluorochemical in the flue gas, and then do not adsorb HF and fluorochemical completely in the secondary filtration layer absorption flue gas through loose accumulation, but also can absorb the CO in the flue gas
2, SO
2, and part fluorocarbon and dust, the further gas in the purifying electrolysis groove.The present invention can solve and constantly outwards give out a large amount of CO in the electrolyzer
2, SO
2, obnoxious flavoures such as POH, fluorocarbon can not be administered the difficult problem of contaminate environment completely, utilize industrial wastes such as carbide slag and magnesium slag, realize CO with the cost of minimum
2, SO
2The storage of isothermal chamber gas and fixing.
Description of drawings
Fig. 1 is one of aluminum electrolysis flue gas purification process flow sheet;
Fig. 2 is two of an aluminum electrolysis flue gas purification process flow sheet;
Fig. 3 is three of an aluminum electrolysis flue gas purification process flow sheet.
Embodiment
Below in conjunction with the accompanying drawing illustrated embodiment the present invention is elaborated.
The present invention be through following technical scheme realize in the production process of electrolytic aluminum, constantly outwards give out a large amount of CO in the aluminium cell
2, SO
2, obnoxious flavour and dust particle such as HF, fluorochemical, fluorocarbon; Behind HF and fluorochemical in the dry method flue gas purification system absorption flue gas; Do not adsorb HF and fluorochemical completely in the calcium carbide slag blanket absorption flue gas through loose accumulation, but also can absorb the CO in the flue gas
2, SO
2, and part fluorocarbon and dust, the further gas in the purifying electrolysis groove.
Instance one: in the aluminum electrolysis process, constantly outwards give out a large amount of CO in the electrolyzer
2, SO
2, obnoxious flavour and dust particle such as fluorochemical.The flue gas purification system of current electrolysis aluminium manufacturer adopts canalization dry cleaning technology; Its principle is to utilize aluminum oxide that gaseous hydrogen fluoride is had this characteristic of stronger adsorptive power; Directly with the raw materials for production-aluminum oxide of electrolysis of aluminum as sorbent material; Obnoxious flavoures such as hydrogen fluoride in the Al adsorption electrolysis flue gas, in two abundant contact processes of gas-solid, the oxidized aluminium absorption of hydrogen fluoride; The dust that brings out in reacted aluminum oxide and the electrolyzer; The combination sack cleaner that gets into parallel connection configuration respectively through smoke pipe is filtered and separates, and the fluoro-containing alumina of recovery can return and continue in the electrolyzer to produce to use, after flue gas absorbs the HF and fluorochemical in the flue gas through the dry method flue gas purification system behind the primary purification; Water cut through loose accumulation is that the calcium carbide slag blanket of 5-65wt% absorbs in the flue gas and do not adsorb HF and fluorochemical completely, but also can absorb the CO in the flue gas
2, SO
2, and part fluorocarbon and dust, the gas in the further purifying electrolysis groove, flue gas after being purified is sent into the chimney emptying through smoke exhaust fan.
Instance two: in the aluminum electrolysis process, constantly outwards give out a large amount of CO in the electrolyzer
2, SO
2, obnoxious flavour and dust particle such as fluorochemical.The flue gas purification system of current electrolysis aluminium manufacturer adopts canalization dry cleaning technology; Its principle is to utilize aluminum oxide that gaseous hydrogen fluoride is had this characteristic of stronger adsorptive power; Directly with the raw materials for production-aluminum oxide of electrolysis of aluminum as sorbent material; Obnoxious flavoures such as hydrogen fluoride in the Al adsorption electrolysis flue gas, in two abundant contact processes of gas-solid, the oxidized aluminium absorption of hydrogen fluoride; The dust that brings out in reacted aluminum oxide and the electrolyzer; The combination sack cleaner that gets into parallel connection configuration respectively through smoke pipe is filtered and separates, and the fluoro-containing alumina of recovery can return and continue in the electrolyzer to produce to use, after flue gas absorbs the HF and fluorochemical in the flue gas through the dry method flue gas purification system behind the primary purification; Water cut through loose accumulation is that the magnesium slag blanket of 5-65wt% absorbs in the flue gas and do not adsorb HF and fluorochemical completely, but also can absorb the CO in the flue gas
2, SO
2, and part POH, fluorocarbon, the further gas in the purifying electrolysis groove, flue gas after being purified is sent into the chimney emptying through smoke exhaust fan.
Instance three: in the aluminum electrolysis process, constantly outwards give out a large amount of CO in the electrolyzer
2, SO
2, obnoxious flavour and dust particle such as fluorochemical.The flue gas purification system of current electrolysis aluminium manufacturer adopts canalization dry cleaning technology; Its principle is to utilize aluminum oxide that gaseous hydrogen fluoride is had this characteristic of stronger adsorptive power; Directly with the raw materials for production-aluminum oxide of electrolysis of aluminum as sorbent material; Obnoxious flavoures such as hydrogen fluoride in the Al adsorption electrolysis flue gas, in two abundant contact processes of gas-solid, the oxidized aluminium absorption of hydrogen fluoride; The dust that brings out in reacted aluminum oxide and the electrolyzer; The combination sack cleaner that gets into parallel connection configuration respectively through smoke pipe is filtered and separates, and the fluoro-containing alumina of recovery can return and continue in the electrolyzer to produce to use, after flue gas absorbs the HF and fluorochemical in the flue gas through the dry method flue gas purification system behind the primary purification; Water cut through loose accumulation is that carbide slag and the magnesium slag blanket of 5-65wt% absorbs in the flue gas and do not adsorb HF and fluorochemical completely, but also can absorb the CO in the flue gas
2, SO
2, and part POH, fluorocarbon, the further gas in the purifying electrolysis groove, flue gas after being purified is sent into the chimney emptying through smoke exhaust fan.
Claims (3)
1. the method for gas cleaning in the aluminum electrolysis; It is characterized in that; Said method comprises following process: after flue gas is handled through a dry purification in the aluminum electrolysis; Filter out HF and fluorochemical in most of flue gas, and then do not adsorb HF and fluorochemical completely in the secondary filtration layer absorption flue gas through loose accumulation, absorb the CO in the flue gas
2, SO
2, and part fluorocarbon and dust, the further gas in the purifying electrolysis groove.
2. the method for gas cleaning in the aluminum electrolysis according to claim 1; It is characterized in that; After flue gas is handled through a dry purification in the said aluminum electrolysis, do not adsorb HF and fluorochemical completely through the secondary filtration layer filtration of loose accumulation again, and absorb the CO in the flue gas
2, SO
2, part fluorocarbon and dust, the material in the secondary filtration layer is carbide slag or is called calcium carbide mud or cobbler's method is practiced the magnesium slag that forms in the magnesium process and the combination of carbide slag and magnesium slag.
3. the method for gas cleaning is characterized in that in the aluminum electrolysis according to claim 1, and the water cut of material is 0.5-40wt% in the said secondary filtration layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210298340.8A CN102828203B (en) | 2012-08-21 | 2012-08-21 | Method for purifying flue gas in aluminum electrolysis production |
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|---|---|---|---|
| CN201210298340.8A CN102828203B (en) | 2012-08-21 | 2012-08-21 | Method for purifying flue gas in aluminum electrolysis production |
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| CN102828203A true CN102828203A (en) | 2012-12-19 |
| CN102828203B CN102828203B (en) | 2015-04-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141155A (en) * | 2014-07-10 | 2014-11-12 | 湖州织里荣华铝业有限公司 | Electrolytic aluminum exhaust gas treatment device |
Citations (5)
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|---|---|---|---|---|
| RU2321687C2 (en) * | 2006-03-01 | 2008-04-10 | Общество с ограниченной ответственностью "Русская инжиниринговая компания" | Thermal neutralizing method of aluminum cell anode gases |
| RU2345178C2 (en) * | 2007-03-26 | 2009-01-27 | Федеральное государственное образовательное учреждение высшего профессионального образования "Сибирский федеральный университет" (СФУ) | Device used for afterburning anode gases of aluminium electrolysis unit |
| CN102011148A (en) * | 2010-12-02 | 2011-04-13 | 云南云铝涌鑫铝业有限公司 | Method for innocent treatment of aluminum electrolysis anode carbon residue and recovery of electrolyte |
| RU2437966C1 (en) * | 2010-10-13 | 2011-12-27 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" | Procedure for cleaning burning device and flue duct network of aluminium electrolyser |
| CN102373489A (en) * | 2010-08-18 | 2012-03-14 | 中国铝业股份有限公司 | Aluminium electrolysis flue gas dry purification method |
-
2012
- 2012-08-21 CN CN201210298340.8A patent/CN102828203B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2321687C2 (en) * | 2006-03-01 | 2008-04-10 | Общество с ограниченной ответственностью "Русская инжиниринговая компания" | Thermal neutralizing method of aluminum cell anode gases |
| RU2345178C2 (en) * | 2007-03-26 | 2009-01-27 | Федеральное государственное образовательное учреждение высшего профессионального образования "Сибирский федеральный университет" (СФУ) | Device used for afterburning anode gases of aluminium electrolysis unit |
| CN102373489A (en) * | 2010-08-18 | 2012-03-14 | 中国铝业股份有限公司 | Aluminium electrolysis flue gas dry purification method |
| RU2437966C1 (en) * | 2010-10-13 | 2011-12-27 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" | Procedure for cleaning burning device and flue duct network of aluminium electrolyser |
| CN102011148A (en) * | 2010-12-02 | 2011-04-13 | 云南云铝涌鑫铝业有限公司 | Method for innocent treatment of aluminum electrolysis anode carbon residue and recovery of electrolyte |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141155A (en) * | 2014-07-10 | 2014-11-12 | 湖州织里荣华铝业有限公司 | Electrolytic aluminum exhaust gas treatment device |
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| CN102828203B (en) | 2015-04-01 |
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Effective date of registration: 20171017 Address after: Lang Jun Center No. 28 road 401120 Chongqing city Yubei District Huanglong longta Street Building 3 2-1 Patentee after: Chongqing AOPO Ruisen Technology Co. Ltd. Address before: 110142 Shenyang economic and Technological Development Zone, Liaoning, No. 11 Patentee before: Shenyang University of Chemical Technology |
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Effective date of registration: 20180607 Address after: 401120 Yubei District, Chongqing Longshan street, Yu Song 1 Road 5, Longhu purple capital 3-1 buildings 22-17 Patentee after: CHONGQING GELIN ENVIRONMENT PROTECTION TECHNOLOGY CO., LTD. Address before: 401120, 3, 2-1, Langjun center, 28 Huanglong Road, Dragon Tower Street, Yubei District, Chongqing. Patentee before: Chongqing AOPO Ruisen Technology Co. Ltd. |
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Granted publication date: 20150401 Termination date: 20190821 |