CN105214421A - A kind of administering method of baking flue gas - Google Patents

A kind of administering method of baking flue gas Download PDF

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Publication number
CN105214421A
CN105214421A CN201410295932.3A CN201410295932A CN105214421A CN 105214421 A CN105214421 A CN 105214421A CN 201410295932 A CN201410295932 A CN 201410295932A CN 105214421 A CN105214421 A CN 105214421A
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CN
China
Prior art keywords
flue gas
administering
scrubbing tower
baking
liquid
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
CN201410295932.3A
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Chinese (zh)
Inventor
宋海琛
崔银河
赵劲松
胡红胜
刘雅锋
邱阳
周东方
汪林
艾秀娟
高晶
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.)
Shenyang Aluminum and Magnesium Engineering and Research Institute Co Ltd
Original Assignee
Shenyang Aluminum and Magnesium Engineering and Research Institute Co Ltd
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 Shenyang Aluminum and Magnesium Engineering and Research Institute Co Ltd filed Critical Shenyang Aluminum and Magnesium Engineering and Research Institute Co Ltd
Priority to CN201410295932.3A priority Critical patent/CN105214421A/en
Publication of CN105214421A publication Critical patent/CN105214421A/en
Pending legal-status Critical Current

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Abstract

The present invention relates to a kind of improvement <b> method </b> of baking flue gas, deliver in scrubbing tower by needing the flue gas administered, in scrubbing tower, adopt wet sprinkling to process flue gas, the liquid come from reservoir washs flue gas in scrubbing tower, the water containing acidic liquid that washing is left enters sedimentation basin, and the flue gas after washing is discharged by chimney.Advantageous effect of the present invention: present invention process flow process is simple, MIN reduces sour gas and alkali lye to equipment, corrosive pipeline, and system energy consumption is lower, and pollutant control is thorough, and operation maintenance is simple, has higher market prospects.

Description

A kind of administering method of baking flue gas
Technical field
The present invention relates to a kind of smoke gas treatment method, particularly relate to a kind of improvement of baking flue gas method, be mainly used in the gas cleaning process of electrolytic aluminium factory carbon element and other relevant exhaust-gas treatment field containing sour gas, tar and dust, as electrode, coking and oil refining industry.
Background technology
The main pollutant in aluminum electrolysis industry carbon element factory is the baking flue gas produced in anode-baking process, containing tar, dust, hydrogen fluoride and sulfur dioxide etc. in baking flue gas.Along with the raising of national environmental standard, country is more and more higher to various pollutant emission index request, and many newly built and improved enterprises are all faced with environmental protection pressure.And on market in carbon element raw material sulphur composition increase, cause sulfur dioxide composition in roaster exiting flue gas significantly to raise, higher than the requirement of discharging standards.In the region that indivedual pollutant catabolic gene is strict, carry out overall control, also need to carry out specially treated to the sour gas such as hydrogen fluoride, sulfur dioxide, make it discharge far below the requirement of national emission concentration standard.
Current baking flue gas purified treatment adopts main method to have following several:
(1), the technique of electrical tar precipitator+dry method
The baking flue gas come from roaster traps tar and dust through electrically trapped tar oil, then through aluminium oxide Dry Adsorption removing hydrogen fluoride gas wherein;
(2), wet sprinkling+electrical tar precipitator
The baking flue gas come from roaster, through cooling tower wet scrubbing, removes wherein hydrogen fluoride and sulfur dioxide, then through electrical tar precipitator removing dust wherein and tar;
(3), the technique of incinerator+dry method
The baking flue gas come from roaster through incinerator removing tar wherein, then through pernicious gases such as dry method removing hydrogen fluoride wherein and sulfur dioxide.
Above several method also exists the shortcomings such as system energy consumption is higher, secondary pollution is difficult to process, equipment investment is high, pollutant process is thorough, equipment corrosion is serious.
Simultaneously along with the development of carbon element industry, pollutant emission may finally can be dressed to world standard, and electrolytic aluminium factory chimney dust emission finally reaches 5mg/Nm 3, total fluorine discharge reaches 0.8mg/Nm 3target, chlorine dioxide discharge reach 100mg/Nm 3, even lower 50mg/Nm 3.Therefore need the baking flue gas developing the newly-built carbon element factory generation of new baking flue gas purification treatment PROCESS FOR TREATMENT, or comprehensive upgrading is carried out to existing roasting flue gas clarification system, to meet the needs of present and following national environmental standard.
Summary of the invention
In order to solve the problems of the technologies described above the improvement that the invention provides a kind of baking flue gas method, object is the various pollutants effectively disposed in baking flue gas, makes that it reaches non-secondary pollution, equipment is simple, easy to operate, system run all right, operation and maintenance cost are low.
For achieving the above object, the present invention is achieved in that a kind of administering method of baking flue gas, deliver in scrubbing tower by needing the flue gas administered, in scrubbing tower, adopt wet sprinkling to process flue gas, the liquid come from reservoir washs flue gas in scrubbing tower, the water containing acidic liquid that washing is left enters sedimentation basin, and the flue gas after washing is discharged by chimney.
Acidic liquid in sedimentation basin regularly adopts scrapper conveyor to take out, and through filter press press filtration, the solid waste after mummification is through innoxious landfill disposal.
The flue gas administered is needed first after cooling tower cooling, to remove tar removing and dust through electrical tar precipitator again before delivering to scrubbing tower.
Liquid in reservoir is akaline liquid or clear water.
Akaline liquid is calcium alkali lye or sodium alkali lye.
Need flue gas fluorinated hydrogen and the sulfur dioxide of improvement.
Sedimentation basin quantity is 1-6.
Scrubbing tower quantity is 1-6.
Chimney quantity is 1-6.
After spray, solution acid alkalinity carries out alkalescence adjustment.
Scrubbing tower is located between electrical tar precipitator and blower fan, or is located between blower fan and chimney, or chimney is placed in top, absorption tower, and blower fan to be located at after electrical tar precipitator in operation.
PH meter and liquid level gauge is provided with in sedimentation basin and reservoir.
Advantageous effect of the present invention: the present invention is not only applicable to carbon element factory's baking flue gas purified treatment, is equally applicable to industry and field that coking, oil refining etc. contain dust or tar and generation sour gas.Not only can remove the pollutant such as dust, tar in flue gas, also can remove the sour gas such as hydrogen fluoride, sulfur dioxide, be a kind of integrated approach administering multi-pollutant gas.Present invention process flow process is simple, MIN reduces sour gas and alkali lye to equipment, corrosive pipeline, and system energy consumption is lower, and pollutant control is thorough, and operation maintenance is simple, has higher market prospects.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the present invention 1.
Fig. 2 is the schematic flow sheet of the embodiment of the present invention 2.
Fig. 3 is the schematic flow sheet of the embodiment of the present invention 3.
In figure: 1, fire-proof flue; 2, cooling tower; 3, deduster flue; 4, electrical tar precipitator; 5, deduster rear pass; 6, blower fan; 7, scrubbing tower; 8, flue; 9, chimney; 10, bypass flue; 11, short circuit flue; 12, sedimentation basin; 13, reservoir; 14, filter press.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail, but protection scope of the present invention not limit by schematic diagram.
Embodiment 1
The administering method of a kind of baking flue gas of the present invention as shown in Figure 1, first enter cooling tower 2 through fire-proof flue 1 from the baking flue gas that roaster is next to cool, cooled flue gas enters electrical tar precipitator 4 except tar removing and dust by deduster flue 3, deliver in scrubbing tower 7 from electrical tar precipitator 4 flue gas out by deduster rear pass 5 and blower fan 6, in scrubbing tower 7, adopt wet sprinkling to process flue gas, flue gas is washed in scrubbing tower 7 from the liquid of reservoir 13, the liquid of reservoir is calcium alkali lye, the water containing acidic liquid that washing is left enters sedimentation basin 12, acidic liquid in sedimentation basin 12 regularly adopts scrapper conveyor to take out, through filter press 14 press filtration, solid waste after mummification is through innoxious landfill disposal, flue gas after washing is by discharging by chimney 9 after flue 8 again.Need the flue gas administered namely from electrical tar precipitator 4 flue gas fluorinated hydrogen out and sulfur dioxide.Liquid in reservoir is calcium alkali lye.Be provided with bypass flue 10 between fire-proof flue 1 and chimney 9, between blower fan 6 and bypass flue 10, be provided with short circuit flue 11
Sedimentation basin quantity is 1, and scrubbing tower quantity is 1, and chimney quantity is 1.
PH meter and liquid level gauge is provided with in sedimentation basin and reservoir.
After spray, solution acid alkalinity carries out alkalescence adjustment.
Embodiment 2
The administering method of a kind of baking flue gas of the present invention as shown in Figure 2, first enter cooling tower 2 through fire-proof flue 1 from the baking flue gas that roaster is next to cool, cooled flue gas enters electrical tar precipitator 4 except tar removing and dust by deduster flue 3, deliver in scrubbing tower 7 from electrical tar precipitator 4 flue gas out by deduster rear pass 5, in scrubbing tower 7, adopt wet sprinkling to process flue gas, flue gas is washed in scrubbing tower 7 from the liquid of reservoir 13, the liquid of reservoir is sodium alkali lye, the water containing acidic liquid that washing is left enters sedimentation basin 12, acidic liquid in sedimentation basin 12 regularly adopts scrapper conveyor to take out, through filter press 14 press filtration, solid waste after mummification is through innoxious landfill disposal, flue gas after washing is by flue 8, discharged by chimney 9 again after blower fan 6.Need the flue gas administered namely from electrical tar precipitator 4 flue gas fluorinated hydrogen out and sulfur dioxide.Liquid in reservoir is sodium alkali lye.Be provided with bypass flue 10 between fire-proof flue 1 and chimney 9, between blower fan 6 and bypass flue 10, be provided with short circuit flue 11
Sedimentation basin quantity is 6, and scrubbing tower quantity is 6, and chimney quantity is 6.
PH meter and liquid level gauge is provided with in sedimentation basin and reservoir.
After spray, solution acid alkalinity carries out alkalescence adjustment.
Embodiment 3
The administering method of a kind of baking flue gas of the present invention as shown in Figure 3, first enter cooling tower 2 through fire-proof flue 1 from the baking flue gas that roaster is next to cool, cooled flue gas enters electrical tar precipitator 4 except tar removing and dust by deduster flue 3, deliver in scrubbing tower 7 from electrical tar precipitator 4 flue gas out by deduster rear pass 5 and blower fan 6, in scrubbing tower 7, adopt wet sprinkling to process flue gas, flue gas is washed in scrubbing tower 7 from the liquid of reservoir 13, the liquid of reservoir is water, the water containing acidic liquid that washing is left enters sedimentation basin 12, acidic liquid in sedimentation basin 12 regularly adopts scrapper conveyor to take out, through filter press 14 press filtration, solid waste after mummification is through innoxious landfill disposal, flue gas after washing is discharged by the chimney 9 be located on scrubbing tower 7.Need the flue gas administered namely from electrical tar precipitator 4 flue gas fluorinated hydrogen out and sulfur dioxide.Liquid in reservoir is water.Be provided with bypass flue 10 between fire-proof flue 1 and chimney 9, between blower fan 6 and bypass flue 10, be provided with short circuit flue 11
Sedimentation basin quantity is 3, and scrubbing tower quantity is 3, and chimney quantity is 3.
PH meter and liquid level gauge is provided with in sedimentation basin and reservoir.
After spray, solution acid alkalinity carries out alkalescence adjustment.
Flue in above-described embodiment arranges various electric thermal insulating butterfly valve or steam insulation butterfly valve, carries out pipeline switching when overhaul of the equipments or flue are caught fire.

Claims (12)

1. the administering method of a baking flue gas, it is characterized in that the flue gas by needs are administered is delivered in scrubbing tower, in scrubbing tower, adopt wet sprinkling to process flue gas, the liquid come from reservoir washs flue gas in scrubbing tower, the water containing acidic liquid that washing is left enters sedimentation basin, and the flue gas after washing is discharged by chimney.
2. the administering method of a kind of baking flue gas according to claim 1, it is characterized in that the acidic liquid in sedimentation basin regularly adopts scrapper conveyor to take out, through filter press press filtration, the solid waste after mummification is through innoxious landfill disposal.
3. the administering method of a kind of baking flue gas according to claim 1, is characterized in that the flue gas that needs are administered first removed tar removing and dust through electrical tar precipitator again before delivering to scrubbing tower after cooling tower cooling.
4. the administering method of a kind of baking flue gas according to claim 1, is characterized in that the liquid in reservoir is akaline liquid or clear water.
5. the administering method of a kind of baking flue gas according to claim 4, is characterized in that akaline liquid is calcium alkali lye or sodium alkali lye.
6. the administering method of a kind of baking flue gas according to claim 1, is characterized in that the flue gas fluorinated hydrogen that needs are administered and sulfur dioxide.
7. the administering method of a kind of baking flue gas according to claim 1, is characterized in that sedimentation basin quantity is 1-6.
8. the administering method of a kind of baking flue gas according to claim 1, is characterized in that scrubbing tower quantity is 1-6.
9. the administering method of a kind of baking flue gas according to claim 1, is characterized in that chimney quantity is 1-6.
10. the administering method of a kind of baking flue gas according to claim 1, is characterized in that spraying rear solution acid alkalinity carries out alkalescence adjustment.
The administering method of 11. a kind of baking flue gas according to claim 1, it is characterized in that scrubbing tower is located between electrical tar precipitator and blower fan, or be located between blower fan and chimney, or chimney is placed in scrubbing tower top, blower fan to be located at after electrical tar precipitator in operation.
The administering method of 12. a kind of baking flue gas according to claim 1, is characterized in that in sedimentation basin and reservoir, be provided with PH meter and liquid level gauge.
CN201410295932.3A 2014-06-27 2014-06-27 A kind of administering method of baking flue gas Pending CN105214421A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106731407A (en) * 2017-01-09 2017-05-31 高国纯 A kind of carbon anode roasting gas cleaning minimum discharge system and technique
TWI708635B (en) * 2018-11-02 2020-11-01 德商達斯環境專家有限責任公司 Apparatus and method for wet cleaning a gas stream

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1034904A (en) * 1988-02-08 1989-08-23 上海化工设计院 The method of purifying coke oven gas and getting ammonium hydrogen carbonate as by-product
CN101310931A (en) * 2007-05-24 2008-11-26 纬泰机械(上海)有限公司 Right-angle positioning apparatus, locking pliers and F clip
CA2677613A1 (en) * 2007-06-27 2008-12-31 H R D Corporation System and process for alkylation
CN101348924A (en) * 2008-08-27 2009-01-21 商丘市丰源铝电有限责任公司 Dry and wet methods combined aluminum electrolysis flue gas deep treatment process
CN101732938A (en) * 2008-11-26 2010-06-16 威海市正大环保设备有限公司 Method and device for electric catching and dry-process purification of carbon baking flue gas
CN101955806A (en) * 2010-09-19 2011-01-26 马鞍山钢铁股份有限公司 Full negative pressure coke oven gas purification integrated process
CN203030151U (en) * 2012-12-25 2013-07-03 辽宁环宇环保技术有限公司 Flue gas purification and solid waste recycling system for cathode electrode roasting kiln

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1034904A (en) * 1988-02-08 1989-08-23 上海化工设计院 The method of purifying coke oven gas and getting ammonium hydrogen carbonate as by-product
CN101310931A (en) * 2007-05-24 2008-11-26 纬泰机械(上海)有限公司 Right-angle positioning apparatus, locking pliers and F clip
CA2677613A1 (en) * 2007-06-27 2008-12-31 H R D Corporation System and process for alkylation
CN101348924A (en) * 2008-08-27 2009-01-21 商丘市丰源铝电有限责任公司 Dry and wet methods combined aluminum electrolysis flue gas deep treatment process
CN101732938A (en) * 2008-11-26 2010-06-16 威海市正大环保设备有限公司 Method and device for electric catching and dry-process purification of carbon baking flue gas
CN101955806A (en) * 2010-09-19 2011-01-26 马鞍山钢铁股份有限公司 Full negative pressure coke oven gas purification integrated process
CN203030151U (en) * 2012-12-25 2013-07-03 辽宁环宇环保技术有限公司 Flue gas purification and solid waste recycling system for cathode electrode roasting kiln

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106731407A (en) * 2017-01-09 2017-05-31 高国纯 A kind of carbon anode roasting gas cleaning minimum discharge system and technique
TWI708635B (en) * 2018-11-02 2020-11-01 德商達斯環境專家有限責任公司 Apparatus and method for wet cleaning a gas stream

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