CN100535195C - Method for purifying smoke gas from aluminum electrolysis and dust extractor thereof - Google Patents
Method for purifying smoke gas from aluminum electrolysis and dust extractor thereof Download PDFInfo
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- CN100535195C CN100535195C CNB2005102004050A CN200510200405A CN100535195C CN 100535195 C CN100535195 C CN 100535195C CN B2005102004050 A CNB2005102004050 A CN B2005102004050A CN 200510200405 A CN200510200405 A CN 200510200405A CN 100535195 C CN100535195 C CN 100535195C
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- flue gas
- fly
- ash separator
- fluoro
- flue
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Abstract
The invention discloses a method for purifying flue gas from aluminum cell and its ash separator, which comprises the following steps: separating most fluorine-containing aluminum oxide from flue gas by centrifugation; mixing fresh aluminum oxide with flue gas uniformly and adsorbing hydrogen fluoride; sending flue gas containing hydrogen fluoride to ash separator to filter flue gas containing hydrogen fluoride; collecting filtered flue gas containing hydrogen fluoride and sending it to warehouse; and emptying purified flue gas. Due to preprocessing flue gas in U-type arc gas passage to separate the most of the fluorine-containing aluminum oxide, the invention can release the burden of filter bag.
Description
Technical field:
The present invention relates to the purifying method and the fly-ash separator thereof of smoking gas containing fluorine in a kind of Aluminum Electrolysis Production, belong to electrolytic aluminum smoke purification techniques field.
Background technology:
In the electrolytic aluminum industrial production, electrolyzer will produce a large amount of flue gases that contains HF in aluminium electrolysis process, if HF enters into surrounding environment, will produce environmental pollution, and the animals and plants body is produced toxic side effect.In the prior art, adopt the flue gas dry cleaning measure usually, promptly adopt hydrogen fluoride in the alumina adsorption flue gas with the nuisance in the flue, control fluorochemical quantity discharged to reach state environmental emissioning standard, reduces the pollution to surrounding environment.
At present in China's aluminium electrolytic flue dry cleaning technology, general using Aluminium Electrolysis raw alumina has the mechanism of stronger adsorptive power to hydrogen fluoride gas, with it smoking gas containing fluorine is carried out dry cleaning, the nuisance gases such as hydrogen fluoride in the absorption flue gas.The fly-ash separator of its use normally feeds the flue gas that is pre-mixed fluoro-containing alumina from the flue of fly-ash separator, by aluminum oxide the objectionable impurities in the flue gas is adsorbed, aluminum oxide behind the absorption flue gas is filtered by the filter bag of fly-ash separator, by delivering in the fluoro-containing alumina storehouse directly emptying of the flue gas that is cleaned after the ash bucket collection.Because the fluoro-containing alumina that is pre-mixed in the flue gas is without pre-separation, cause the filter bag workload of fly-ash separator big, the deashing number of times increases, make the easier breakage of filter bag, and there is a relatively low problem of the percentage composition of fresh aluminum oxide in the fly-ash separator, influence hydrogen fluoride gas adsorption cleaning efficient, used decontamination effect improving not ideal enough.
Summary of the invention:
The objective of the invention is to: provide a kind of decontamination effect improving is better, the filter bag working efficiency is higher electrolytic aluminum smoke purifying method and fly-ash separator thereof, to overcome the deficiencies in the prior art.
The present invention realizes like this, electrolytic aluminum smoke purifying method of the present invention is: it will be pre-mixed the arc flue of the flue gas feeding fly-ash separator of fluoro-containing alumina, centrifugation goes out the fluoro-containing alumina in most of flue gas in arc flue, the fluoro-containing alumina that separates falls in the ash bucket, flue gas enters into the lower box of fly-ash separator simultaneously, fresh aluminum oxide is joined lower box, mix with flue gas uniformly, behind the flue gas thorough mixing, a small amount of oarse-grained aluminum oxide drops in the ash bucket, most aluminum oxide moves in the intravital filter bag of raising middle flask of fly-ash separator with flue gas, filtered by filter bag, on filter bag, pulse compression air deashing in reverse-blow pipe drops in the ash bucket, fluoro-containing alumina in the ash bucket is transported to the fluoro-containing alumina storehouse after collecting, and the flue gas after being cleaned enters smoke-uptake by the upper box of fly-ash separator, at last by the chimney emptying; Air hoist is installed below fly-ash separator, and fresh aluminum oxide adopts air hoist to be driven in the fly-ash separator, and is ejected into equably in the interior flue gas of fly-ash separator.
The fly-ash separator that is used for method of the present invention is: it comprises the housing 1 of fly-ash separator, in housing 1, be provided with lower box 2, middle casing 3 and upper box 10, on middle casing 3, be provided with filter bag 8, have ash bucket 4 at lower box 2, on lower box 2, be connected with the arc flue 5 of n type, arc flue 5 to advance mouth 6 downward; Below lower box 2, be provided with air hoist 7.
The present invention utilizes the arc flue of n type; isolate the fluoro-containing alumina in most of flue gas; the fluoro-containing alumina that separates enters in the ash bucket of fly-ash separator; alleviated the burden of filter bag; prolonged the working life of filter bag; adopt air hoist that fresh aluminum oxide evenly is ejected in the interior flue gas of fly-ash separator simultaneously; can make aluminum oxide and flue gas thorough mixing; improved adsorption cleaning efficient to hydrogen fluoride gas; reach the purpose of protection environment; also improve raw-material recovery utilization rates such as HF simultaneously, reduced raw-material consumption.Therefore, the present invention compared with prior art, the present invention has the advantage of good purification, filter bag high efficiency.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present invention;
Accompanying drawing 2 is the right view of accompanying drawing 1.
Embodiment:
Embodiments of the invention: in the housing 1 of fly-ash separator, produce lower box 2, middle casing 3 and upper box 10, filter bag 8 is installed on middle casing 3,2 times an ash bucket 4 is installed at lower box, the arc flue 5 that on lower box 2, connects one section n type, the mouth 6 that advances of arc flue 5 is installed downwards, below lower box 2, connected an air hoist 7 at last.During work, the flue gas that is pre-mixed fluoro-containing alumina is entered arc flue 5 from advancing mouth 6, centrifugation goes out the fluoro-containing alumina in most of flue gas in arc flue 5, the aluminum oxide that separates enters in the ash bucket 4, flue gas enters into lower box 2 simultaneously, fresh aluminum oxide is driven into lower box 2 with small-sized air hoist 7, evenly be ejected in the flue gas in the housing 1, behind the flue gas thorough mixing, a small amount of oarse-grained aluminum oxide drops in the ash bucket 4, most aluminum oxide moves in the middle casing 3 of housing 1 with flue gas, is filtered by filter bag 8 at last, on filter bag 8, pulse compression air deashing in reverse-blow pipe 9 drops in the ash bucket 4, fluoro-containing alumina in the ash bucket 4 is transported to the fluoro-containing alumina storehouse after collecting, and the flue gas after being cleaned enters smoke-uptake by upper box 10, at last by the chimney emptying.
Claims (4)
1. electrolytic aluminum smoke purifying method, it comprises adopts the fly-ash separator flue, it is characterized in that: the flue gas that will be pre-mixed fluoro-containing alumina earlier passes through centrifugal motion, isolate the most of fluoro-containing alumina in the flue gas, again fresh aluminum oxide is joined in the flue gas, mix with flue gas uniformly, hydrogen fluoride in the absorption flue gas, the flue gas that will be mixed with aluminum oxide then is sent in the intravital filter bag of raising middle flask of fly-ash separator, fluoro-containing alumina behind the absorption hydrogen fluoride is filtered, to be transported to the fluoro-containing alumina storehouse, the direct emptying of the flue gas after being cleaned after the fluoro-containing alumina collection of filtering.
2. electrolytic aluminum smoke purifying method according to claim 1 is characterized in that: fresh aluminum oxide adopts air hoist to be driven in the fly-ash separator, and is ejected into equably in the interior flue gas of fly-ash separator.
3. fly-ash separator that is used for the described method of claim 1, it comprises fly-ash separator housing (1), in housing (1), be provided with lower box (2), middle casing (3) and upper box (10), on middle casing (3), be provided with filter bag (8), below lower box (2), be provided with ash bucket (4), it is characterized in that: on lower box (2), be connected with the arc flue (5) of n type, arc flue (5) to advance mouth (6) downward.
4. fly-ash separator according to claim 3 is characterized in that: be provided with air hoist (7) in lower box (2) below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005102004050A CN100535195C (en) | 2005-07-19 | 2005-07-19 | Method for purifying smoke gas from aluminum electrolysis and dust extractor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005102004050A CN100535195C (en) | 2005-07-19 | 2005-07-19 | Method for purifying smoke gas from aluminum electrolysis and dust extractor thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1737203A CN1737203A (en) | 2006-02-22 |
| CN100535195C true CN100535195C (en) | 2009-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005102004050A Expired - Fee Related CN100535195C (en) | 2005-07-19 | 2005-07-19 | Method for purifying smoke gas from aluminum electrolysis and dust extractor thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100535195C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323960B (en) * | 2007-06-12 | 2010-09-22 | 贵阳铝镁设计研究院 | Purified feeding method and purified feeding apparatus for aluminum electrolysis flue gas |
| CN101347697B (en) * | 2007-07-17 | 2011-07-27 | 贵阳铝镁设计研究院有限公司 | Bidirectional rotational flow separation cloth bag dust remover and dust collection method |
| CN105986287A (en) * | 2015-02-09 | 2016-10-05 | 河南科达东大国际工程有限公司 | Flue gas purification device |
| CN105477938B (en) * | 2016-01-21 | 2018-02-09 | 福建龙净环保股份有限公司 | A kind of pre- dust arrester installation of twin-stage inertial separation being used for before SCR denitration system |
| CN108854505A (en) * | 2018-06-17 | 2018-11-23 | 曾文飞 | A kind of electrolytic aluminium waste Flash Gas Compression Skid System and processing method |
-
2005
- 2005-07-19 CN CNB2005102004050A patent/CN100535195C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1737203A (en) | 2006-02-22 |
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Owner name: GUIYANG ALUMINIUM AND MAGNESIUM DESIGN INSTITUTE C Free format text: FORMER OWNER: GUIYANG ALUMINIUM AND MAGNESIUM DESIGN INST. Effective date: 20110523 |
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Free format text: CORRECT: ADDRESS; FROM: 550004 NO. 208, BEIJING ROAD, GUIYANG CITY, GUIZHOU PROVINCE TO: 550081 NO.2, JINZHU ROAD, JINYANG NEW DISTRICT, GUIYANG CITY, GUIZHOU PROVINCE |
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Effective date of registration: 20110523 Address after: 550081 Guiyang Province, Jinyang New District, Zhu Zhu Road, No. 2 Patentee after: Guiyang Aluminum & Magnesium Design Institute Co., Ltd. Address before: 550004 No. 208, Beijing Road, Guiyang, Guizhou Patentee before: Guiyang Aluminium and Magnesium Design Inst. |
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Granted publication date: 20090902 Termination date: 20140719 |
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