CN110528027B - Method for large repairing gas of electrolytic cell - Google Patents
Method for large repairing gas of electrolytic cell Download PDFInfo
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- CN110528027B CN110528027B CN201910927043.7A CN201910927043A CN110528027B CN 110528027 B CN110528027 B CN 110528027B CN 201910927043 A CN201910927043 A CN 201910927043A CN 110528027 B CN110528027 B CN 110528027B
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- flue gas
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/22—Collecting emitted gases
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Abstract
The invention relates to the field of industrial aluminum electrolysis, in particular to a method for electrolytic bath overhaul gas, which is suitable for reducing the unorganized emission of an electrolytic bath in the overhaul process. A gas collecting device is added on the electrolytic cell, and an independent flue gas purification system is added near the overhaul groove of the electrolytic plant; when the electrolytic cell is overhauled, the flue gas generated in the process of planning the electrolytic cell is collected by the gas collecting device, purified by the flue gas purification system and discharged into the atmosphere. The method can greatly reduce the inorganization discharge amount in the electrolytic cell overhaul process, can collect and treat pollutants such as dust and the like in the grooving process, and does not introduce the original purification system. The method does not influence the normal operation of the electrolytic bath, meets the requirement of the operation space, and is suitable for the operation and the environment of the electrolytic bath.
Description
Technical Field
The invention relates to the field of industrial aluminum electrolysis, in particular to a method for large repair gas of an electrolytic cell.
Background
The industrial aluminum electrolytic bath takes cryolite-alumina melt as electrolyte and carbon material as electrode for electrolysis, liquid metal aluminum is separated out on the cathode, and liquid metal aluminum is separated out on the anodeTo produce CO2A predominantly gaseous species. Meanwhile, the electrolytic bath also emits harmful gas which takes fluoride, sulfur dioxide and dust as main pollutants, and the harmful gas permeates in an electrolytic workshop, so that the labor condition is worsened, and the health of production workers is seriously influenced. The diffusion of the electrolysis flue gas to the periphery of the plant area pollutes the atmosphere, and brings great harm to the development of agriculture and animal husbandry production and the life of people. Therefore, under the current environment-friendly situation, the treatment technology of the electrolytic flue gas is further perfected, and the reduction of the pollutant discharge amount is of great importance.
During the overhaul of the electrolytic cell, a large amount of pollutants such as dust and the like are generated, and the influence on the workshop environment is great. Therefore, it is necessary to develop a method for electrolytic bath overhaul gas, which collects pollutants such as dust emitted during the electrolytic bath shaving process, does not affect the normal shaving work of the electrolytic bath, meets the requirement of the operation space, and adapts to the operation and environment of the electrolytic bath.
Disclosure of Invention
Aiming at pollutants such as dust and the like emitted in the overhaul process of the electrolytic cell, the invention aims to provide a method for overhauling gas in the electrolytic cell, which can reduce the unorganized emission of the electrolytic cell in the overhaul process.
To achieve the above object, the present invention is realized by:
a method for overhauling gas in an electrolytic cell comprises the steps of adding a gas collecting device on the electrolytic cell, and adding an independent flue gas purification system near the electrolytic cell in an electrolytic workshop; when the electrolytic cell is overhauled, the flue gas generated in the process of planning the electrolytic cell is collected by the gas collecting device, purified by the flue gas purification system and discharged into the atmosphere.
The gas collecting device comprises a dust collecting cover, a bracket with a slideway and a telescopic pipeline, wherein pulleys are arranged at the bottoms of two ends of the bracket with the slideway, the two pulleys are respectively positioned on oppositely arranged edge plates of the electrolytic cell, the bracket with the slideway is provided with the dust collecting cover, and the dust collecting cover is in sliding fit with the bracket with the slideway; the flue gas purification system comprises a dust remover and an induced draft fan, the opening direction of one end of the dust collection cover corresponds to the electrolytic cell, the other end of the dust collection cover is communicated with the inlet of the dust remover through a telescopic pipeline, the outlet of the dust remover is communicated with the induced draft fan, and flue gas enters the dust remover along the telescopic pipeline to enter air after entering the dust remover for dust removal.
The method for overhauling the gas in the electrolytic bath comprises the steps of planing the electrolytic bath when the electrolytic bath is overhauled, and moving the dust collection cover to the upper part of the side of the planing groove so as to be close to the planing groove and not to influence the planing operation; the dust collection cover collects pollutants generated by the planing operation along with the movement of the planing operation under the action of the slideway support.
In the method for overhauling the gas in the electrolytic cell, the dust collecting cover of the gas collecting device moves on the electrolytic cell along the length direction of the electrolytic cell through the pulley with the slideway support on the electrolytic cell along the plate; the dust collecting cover of the gas collecting device moves on the support with the slideway along the width direction of the electrolytic bath.
According to the method for overhauling the gas in the electrolytic cell, the moving range of the dust hood covers the whole electrolytic cell, the dust hood is moved to the planning operation position in a manual or electric moving mode, smoke generated in the planning operation is collected, and the dust collection requirement of the planning operation is met.
According to the method for the electrolytic bath to largely repair the gas, the telescopic pipeline is telescopic according to the position of the planning groove and the distance between the dust collection cover and the dust remover, so that the flue gas collected by the dust collection cover can enter the flue gas purification system.
The method for the major repair of the gas in the electrolytic cell is characterized in that a dust remover is provided with a dust removing device and a periodic discharging device.
According to the method for overhauling the gas in the electrolytic cell, the gas collecting device is easy to disassemble and assemble, can be moved to other electrolytic cells needing overhauling for operation and can be repeatedly used; the flue gas purification system is also independent, can be disassembled and moved and can be repeatedly used.
In summary, the advantages and beneficial effects of the invention are as follows:
1. the method is simple, easy to operate and easy to control;
2. the device is simple, easy to manufacture, less in used materials and low in cost.
3. The device related to the major repair gas method is easy to disassemble, assemble and move, and can be repeatedly used.
4. The dust collecting hood of the invention can move along with the operation of the planing trough, and has high gas collecting efficiency and low energy consumption.
5. The invention is provided with an independent flue gas purification system, and the overhaul flue gas is not introduced into the original purification system, thereby not influencing the stable production of electrolysis.
6. The heavy repairing gas method does not influence the normal operation of the electrolytic bath, meets the operation space requirement and adapts to the operation and environment of the electrolytic bath.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
In the figure: 1. an electrolytic bath edge plate; 2. a dust collection cover; 3. a bracket with a slideway; 4. a pulley; 5. a collapsible duct; 6. a dust remover; 7. an induced draft fan.
Detailed Description
The invention will be described in detail below with reference to the drawings, but the scope of the invention is not limited by the drawings.
As shown in figure 1, the gas collection device is arranged on the electrolytic bath, the gas collection device comprises a dust collection cover 2, a support 3 with a slideway and a telescopic pipeline 5, pulleys 4 are arranged at the bottoms of the two ends of the support 3 with the slideway, the two pulleys 4 are respectively positioned on the edge plates 1 of the electrolytic bath which are oppositely arranged, the support 3 with the slideway is provided with the dust collection cover 2, the dust collection cover 2 is in sliding fit with the slideway on the support 3 with the slideway, the opening direction of one end of the dust collection cover 2 corresponds to the electrolytic bath, the other end of the dust collection cover 2 is communicated with the inlet of a dust remover 6 through the telescopic pipeline 5, and the outlet of the dust remover 6 is communicated with a draught fan 7. The telescopic pipeline 5 can be telescopic according to the position of the planing groove and the distance between the dust collection cover 2 and the dust remover 6, so that the flue gas collected by the dust collection cover 2 is ensured to enter the flue gas purification system, and other operations are not influenced.
As shown in figure 1, the method for greatly repairing gas in the electrolytic cell of the invention collects the flue gas in the process of planing the cell by the gas collection device moving along with the position of the planing cell. The flue gas of collecting gets into gas cleaning system along scalable pipeline 5, and this gas cleaning system includes dust remover 6 and draught fan 7 etc. and the flue gas gets into dust remover 6 along scalable pipeline 5 and removes dust the back, gets into the air through draught fan 7. The dust remover 6 is provided with a dust cleaning device and a periodic discharging device as required.
When the electrolytic cell is overhauled, the electrolytic cell is planed, and the dust collection cover 2 is moved to the upper part of the side of the planing cell, so that the dust collection cover is close to the planing cell and does not influence the planing operation. The dust collection cover 2 collects pollutants such as dust generated by the planing operation along with the movement of the planing operation under the action of the slideway support 3. The dust collecting cover 2 of the gas collecting device can move on the electrolytic tank along the length direction of the electrolytic tank on the electrolytic tank along plate 1 through a pulley 4 with a slideway support 3 on the electrolytic tank along plate 1; the dust collecting hood 2 of the gas collecting device can also move on the strip slideway support 3 along the width direction of the electrolytic bath. The moving range of the dust collection cover 2 covers the whole electrolytic tank, the dust collection cover 2 is moved to the position of the planing operation by a manual or electric moving mode, smoke generated by the planing operation is collected, and the dust collection requirement of the planing operation is met.
The heavy repairing gas method does not influence the normal operation of the electrolytic bath, meets the operation space requirement and adapts to the operation and environment of the electrolytic bath. In the device related to the heavy repair gas method, all materials are high temperature resistant and corrosion resistant, and are suitable for the operation and environmental requirements of the electrolytic cell. The gas collecting device related to the major repair gas method is easy to disassemble and assemble and can be moved to other electrolytic tanks needing major repair for operation. The flue gas purification system is also independent, does not enter the original purification system, and can be disassembled, moved and reused.
The result shows that the method can greatly reduce the inorganization discharge amount in the electrolytic cell overhaul process, can collect and treat pollutants such as dust and the like in the process of planning the electrolytic cell, and does not introduce the original purification system. The method does not influence the normal operation of the electrolytic bath, meets the requirement of the operation space, and is suitable for the operation and the environment of the electrolytic bath.
Claims (3)
1. A method for overhauling gas in an electrolytic cell is characterized in that a gas collecting device is added on the electrolytic cell, and an independent flue gas purification system is added near the electrolytic cell in an electrolytic workshop; when the electrolytic cell is overhauled, the flue gas generated in the process of planning the electrolytic cell is collected by the gas collecting device, purified by the flue gas purification system and discharged into the atmosphere;
the gas collecting device comprises a dust collecting cover, a bracket with a slideway and a telescopic pipeline, wherein pulleys are arranged at the bottoms of two ends of the bracket with the slideway, the two pulleys are respectively positioned on the edge plates of the electrolytic bath which are oppositely arranged, the bracket with the slideway is provided with the dust collecting cover, and the dust collecting cover is in sliding fit with the bracket with the slideway; the flue gas purification system comprises a dust remover and an induced draft fan, wherein the opening direction of one end of the dust collection cover corresponds to the electrolytic bath, the other end of the dust collection cover is communicated with the inlet of the dust remover through a telescopic pipeline, the outlet of the dust remover is communicated with the induced draft fan, and flue gas enters the dust remover along the telescopic pipeline for dust removal and then enters air through the induced draft fan;
when the electrolytic cell is overhauled, the electrolytic cell is planed, and the dust collection cover is moved to the upper part of the side of the planing cell, so that the dust collection cover is close to the planing cell and does not influence the planing operation; the dust collection cover collects pollutants generated by the planing operation along with the movement of the planing operation under the action of the slideway support;
the dust collecting cover of the gas collecting device moves on the electrolytic bath edge plate along the length direction of the electrolytic bath through a pulley with a slideway support on the electrolytic bath edge plate; the dust collecting cover of the gas collecting device moves on the support with the slideway along the width direction of the electrolytic bath;
the moving range of the dust collection cover covers the whole electrolytic bath, the dust collection cover is moved to the planning operation position by a manual or electric moving mode, smoke generated by the planning operation is collected, and the dust collection requirement of the planning operation is ensured;
the telescopic pipeline is telescopic according to the position of the planing groove and the distance between the dust collection cover and the dust remover, so that the flue gas collected by the dust collection cover can enter the flue gas purification system.
2. The method of claim 1 wherein the dust separator is provided with a dust removal device and a periodic discharge device.
3. The method for electrolytic bath major repair gas according to claim 1, wherein the gas collecting device is easy to disassemble and assemble, can be moved to other electrolytic bath operation needing major repair, and can be reused; the flue gas purification system is also independent, can be disassembled and moved and can be repeatedly used.
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| CN201910927043.7A CN110528027B (en) | 2019-09-27 | 2019-09-27 | Method for large repairing gas of electrolytic cell |
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| CN201910927043.7A CN110528027B (en) | 2019-09-27 | 2019-09-27 | Method for large repairing gas of electrolytic cell |
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| CN110528027A CN110528027A (en) | 2019-12-03 |
| CN110528027B true CN110528027B (en) | 2021-08-31 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2835266Y (en) * | 2005-11-04 | 2006-11-08 | 贵阳铝镁设计研究院 | Combined gas-collecting trough cover for prebaked anode aluminum cell |
| CN101440500A (en) * | 2007-11-22 | 2009-05-27 | 中国铝业股份有限公司 | Method for processing waste cathode carbon block from aluminum cell overhaul residue |
| CN101575716A (en) * | 2008-05-08 | 2009-11-11 | 沈阳铝镁设计研究院 | Electrolyzer liner dismounting structure of electrolyzer centralized overhaul workshop |
| CN101591789A (en) * | 2008-05-29 | 2009-12-02 | 贵阳铝镁设计研究院 | Tear the distributing style between stove in a kind of electrolytic cell overhaul workshop open |
| CN101654793A (en) * | 2008-08-19 | 2010-02-24 | 沈阳铝镁设计研究院 | Electrolytic cell gathering overhaul workshop middle digging structure |
| CN203291434U (en) * | 2013-05-31 | 2013-11-20 | 吴正建 | Harmless processing system for electrolytic aluminium overhaul slag |
| CN204570060U (en) * | 2015-04-22 | 2015-08-19 | 沈阳铝镁科技有限公司 | Aluminum electrolyzing cell used multistage stand alone type gas collection lower flue structure |
| CN110257861A (en) * | 2019-07-16 | 2019-09-20 | 沈阳铝镁科技有限公司 | A kind of method of crown blocks in electrolysis shop gas collection |
-
2019
- 2019-09-27 CN CN201910927043.7A patent/CN110528027B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2835266Y (en) * | 2005-11-04 | 2006-11-08 | 贵阳铝镁设计研究院 | Combined gas-collecting trough cover for prebaked anode aluminum cell |
| CN101440500A (en) * | 2007-11-22 | 2009-05-27 | 中国铝业股份有限公司 | Method for processing waste cathode carbon block from aluminum cell overhaul residue |
| CN101575716A (en) * | 2008-05-08 | 2009-11-11 | 沈阳铝镁设计研究院 | Electrolyzer liner dismounting structure of electrolyzer centralized overhaul workshop |
| CN101591789A (en) * | 2008-05-29 | 2009-12-02 | 贵阳铝镁设计研究院 | Tear the distributing style between stove in a kind of electrolytic cell overhaul workshop open |
| CN101654793A (en) * | 2008-08-19 | 2010-02-24 | 沈阳铝镁设计研究院 | Electrolytic cell gathering overhaul workshop middle digging structure |
| CN203291434U (en) * | 2013-05-31 | 2013-11-20 | 吴正建 | Harmless processing system for electrolytic aluminium overhaul slag |
| CN204570060U (en) * | 2015-04-22 | 2015-08-19 | 沈阳铝镁科技有限公司 | Aluminum electrolyzing cell used multistage stand alone type gas collection lower flue structure |
| CN110257861A (en) * | 2019-07-16 | 2019-09-20 | 沈阳铝镁科技有限公司 | A kind of method of crown blocks in electrolysis shop gas collection |
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| CN110528027A (en) | 2019-12-03 |
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Address after: 029200 Industrial Park, Tongliao City, the Inner Mongolia Autonomous Region Patentee after: INNER MONGOLIA HMHJ ALUMINUM ELECTRICITY Co.,Ltd. Patentee after: SHENYANG ALUMINIUM AND MAGNESIUM ENGINEERING AND RESEARCH INSTITUTE COMPANY LIMITED Address before: 110001 Heping North Street 184, Heping District, Liaoning, Shenyang Patentee before: SHENYANG ALUMINIUM AND MAGNESIUM ENGINEERING AND RESEARCH INSTITUTE COMPANY LIMITED Patentee before: INNER MONGOLIA HMHJ ALUMINUM ELECTRICITY Co.,Ltd. |
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