CN100362140C - Fluoride purification process in electrolytic production of aluminum and dust collector therefor - Google Patents
Fluoride purification process in electrolytic production of aluminum and dust collector therefor Download PDFInfo
- Publication number
- CN100362140C CN100362140C CNB2004100401592A CN200410040159A CN100362140C CN 100362140 C CN100362140 C CN 100362140C CN B2004100401592 A CNB2004100401592 A CN B2004100401592A CN 200410040159 A CN200410040159 A CN 200410040159A CN 100362140 C CN100362140 C CN 100362140C
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- Prior art keywords
- dust
- enters
- middle casing
- airflow
- absorption reaction
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- 239000000428 dust Substances 0.000 title claims abstract description 16
- 238000000746 purification Methods 0.000 title claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title abstract description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 title abstract 3
- 239000007789 gas Substances 0.000 claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003546 flue gas Substances 0.000 claims abstract description 20
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims abstract description 18
- 238000009826 distribution Methods 0.000 claims abstract description 11
- 238000001179 sorption measurement Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims description 26
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 15
- 239000002956 ash Substances 0.000 claims description 10
- 239000004411 aluminium Substances 0.000 claims description 8
- 239000010881 fly ash Substances 0.000 claims description 7
- 238000005868 electrolysis reaction Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 3
- 239000008187 granular material Substances 0.000 abstract 1
- 230000000274 adsorptive effect Effects 0.000 description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000005108 dry cleaning Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The present invention discloses a fluoride purification technology in the electrolytic production of aluminum and a dust collector thereof. After alumina for adsorption use is added to flue gas containing hydrogen fluoride and dust, an n-shaped adsorption reaction passage enters a wind pipe. Hydrogen fluoride in the flue gas is adsorbed by the added alumina, and airflow uniformly enters a dust hopper of a dust remover by a vertical airflow distributor. The airflow enters a secondary airflow distribution segment through the dust hopper, and the airflow is distributed for the second time. Simultaneously, a part of dust with large granules in dust contained gas is separated and precipitated. When the airflow containing dust enters a box body and passes through a filtering bag, the final adsorption process is completed, and the clean airflow enters an upper box body and is discharged from an air outlet. The fluoride purification technology has the advantages of good effect on adsorbing and purifying hydrogen fluoride, high efficiency for collecting alumina, etc. The device is simple in structure and compact.
Description
Technical field:
The present invention relates to a kind of aluminum electrolysis flue gas purification technology and equipment thereof.
Background technology:
Prebaked cell for aluminum-reduction produce in process of production mainly contain the pest fluorochemical be one to the serious material of topsoil, and the measure of employing flue gas dry cleaning, adopt the hydrogen fluoride in the alumina adsorption flue gas, nuisance in the flue, reach state environmental emissioning standard, reducing the fluorochemical quantity discharged, reduce the pollution to surrounding environment, is the vital problem of smoke gas treatment of aluminium cell.
Aluminium cell flue gas dry cleaning process using raw materials for production aluminum oxide is as absorbent, the nuisance gases such as hydrogen fluoride in the absorption flue gas, and the aluminum oxide after the absorption turns back in the production technique, directly reclaims fluorine, is the purification process with comprehensive utilization.It is short that dry purification process has flow process, the purification efficiency height, and power consumption is low, and is reliable, non-secondary pollution, the characteristics of convenient operation and management can solve the smoke pollution problem of aluminium cell up hill and dale.Its technical process is: every electrolyzer flue gas pools together the sack cleaner that enters purification system by smoke discharging pipe, before entering sack cleaner, quantitatively add fresh aluminum oxide in the flue gas stream, mix with hydrogen fluoride gas in the flue gas by reactor, but the aluminum oxide filtering layer on reactor and the filter bag is the absorption hydrogen fluoride gas all, and the aluminum oxide after the absorption is collected by the sack cleaner filtering separation.Through handling equipments such as air-driven chute, lifts, a part is delivered to the production of bunker electrolysis groove and is used, the flue that a part turns back to before the sack cleaner again mixes with hydrogen fluoride gas in the flue gas, makes the abundant oxidized aluminium absorption of hydrogen fluoride gas, guarantees higher purification efficiency.
At present, the adsorptive reactor of flue gas purification system and sack cleaner are to separate two partly both at home and abroad, the adsorptive reactor effect is that hydrogen fluoride gas in sorbent material aluminum oxide and the flue gas is fully contacted mixing, and the effect of sack cleaner is to collect for producing and use containing hydrofluoric aluminum oxide.Adsorption and oxidation aluminium delivery system is complicated disperses because adsorptive reactor and sack cleaner separately, cause and the problem that it mainly exists is, cause the maintenance management difficulty, and adsorption efficiency is low.Can not satisfy the more and more higher requirement of national environmental protection policy.
Summary of the invention:
The objective of the invention is to: provide a kind of adsorptive reactor and sack cleaner are combined as a whole, its compact construction, adsorption cleaning hydrogen fluoride is effective, collects high purification process and the equipment of aluminum oxide efficient.
The present invention is achieved in that the flue gas that will contain hydrogen fluoride and dust adds absorption with sending into n type absorption reaction passage (1) from airduct (8) behind the aluminum oxide, in n type absorption reaction passage (1), the aluminum oxide that hydrogen fluoride in the flue gas is added into is adsorbed, finishes absorption reaction for the first time; And make air-flow evenly enter the ash bucket (7) of fly-ash separator by uprush sparger (2), air communication ash flue bucket (7) enters the secondary gas flow distribution section (3) that is located in the middle casing (5), air-flow is carried out quadratic distribution, simultaneously separated the settling down of the oarse-grained dust of part in the dusty gas; When dust-contained airflow enters middle casing (5) by filter bag (4), finish last adsorption process, clean gas flow enters upper box (6) and discharges from air outlet.
Fly-ash separator of the present invention is to constitute like this: it comprises n type absorption reaction passage (1), uprush sparger (2), secondary gas flow distribution section (3), filter bag (4), middle casing (5), upper box (6), ash bucket (7), airduct (8), airduct (8) is connected with the import of n type absorption reaction passage (1), and uprush sparger (2) is located in the back segment of n type absorption reaction passage (1); Secondary gas flow distribution section (3) is communicated with n type absorption reaction passage (1), is ash bucket (7) in its lower section, is middle casing (5) in the above. filter bag (4) is housed in middle casing (5); On middle casing (5) upper box (6).
Pulse valve (9) and winding-up pipe (10) also are housed between middle casing (5) and upper box (6).
The present invention compared with prior art, it is effective to have adsorption cleaning hydrogen fluoride, collects aluminum oxide efficient advantages of higher.Its device structure is simple, compact.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present invention.
Embodiment:
Embodiments of the invention: the flue gas that contains hydrogen fluoride and dust is after adding absorption is with aluminum oxide, enter n type absorption reaction passage (1) from airduct (8), in n type absorption reaction passage (1), the aluminum oxide that the hydrogen fluoride in the flue gas is added into is adsorbed, finishes absorption reaction for the first time; Uprush sparger (2) in n type absorption reaction passage (1) has the effect of uniform air-flow simultaneously, make air-flow can evenly enter the ash bucket (7) of fly-ash separator, air communication ash flue bucket (7) enters the secondary gas flow distribution section (3) that is located in the middle casing (5), air-flow is carried out quadratic distribution, make air-flow more evenly enter filter bag (4) and reduce air-flow to the washing away of filter bag (4), the oarse-grained dust of part distributes section (3) is separated at the secondary gas flow that slows down rapidly and settles down in the dusty gas simultaneously.When dust-contained airflow enters middle casing (5) by filter bag (4), finish last adsorption process, dust in flue gas is intercepted by filter bag (4) simultaneously, and dusty gas is cleaned.After air communication filter bag (4) filtered, clean gas flow entered upper box (6) and discharges from air outlet.Pulse valve (9) and winding-up pipe (10) also are housed between middle casing (5) and upper box (6), are used for filter bag (4) deashing, make whole polishing filter guarantee the resistance of design.
Claims (3)
1. fluorochemical purification process in the Aluminium Electrolysis, it is characterized in that: the flue gas that will contain hydrogen fluoride and dust adds absorption with sending into n type absorption reaction passage (1) from airduct (8) behind the aluminum oxide, in n type absorption reaction passage (1), the aluminum oxide that hydrogen fluoride in the flue gas is added into is adsorbed, finish absorption reaction for the first time: and make air-flow evenly enter the ash bucket (7) of fly-ash separator by uprush sparger (2), air communication ash flue bucket (7) enters the secondary gas flow distribution section (3) that is located in the middle casing (5), air-flow is carried out quadratic distribution, simultaneously separated the settling down of the oarse-grained dust of part in the dusty gas; When dust-contained airflow enters middle casing (5) by filter bag (4), finish last adsorption process, clean gas flow enters upper box (6) and discharges from air outlet.
2. the fly-ash separator of fluorochemical purification process in the described Aluminium Electrolysis of claim 1, it comprises n type absorption reaction passage (1), uprush sparger (2), secondary gas flow distribution section (3), filter bag (4), middle casing (5), upper box (6), ash bucket (7), airduct (8) is characterized in that: airduct (8) is connected with the import of n type absorption reaction passage (1), uprush sparger (2) is located in the back segment of n type absorption reaction passage (1): secondary gas flow distribution section (3) is communicated with n type absorption reaction passage (1), being ash bucket (7) in its lower section, is middle casing (5) in the above, and filter bag (4) is housed in middle casing (5); On middle casing (5) upper box (6).
3. fly-ash separator according to claim 2 is characterized in that: pulse valve (9) and winding-up pipe (10) also are housed between middle casing (5) and upper box (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100401592A CN100362140C (en) | 2004-07-06 | 2004-07-06 | Fluoride purification process in electrolytic production of aluminum and dust collector therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100401592A CN100362140C (en) | 2004-07-06 | 2004-07-06 | Fluoride purification process in electrolytic production of aluminum and dust collector therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1594664A CN1594664A (en) | 2005-03-16 |
| CN100362140C true CN100362140C (en) | 2008-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100401592A Expired - Lifetime CN100362140C (en) | 2004-07-06 | 2004-07-06 | Fluoride purification process in electrolytic production of aluminum and dust collector therefor |
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| CN (1) | CN100362140C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054694B (en) * | 2007-02-17 | 2010-07-21 | 贵阳铝镁设计研究院 | Charging method and device for purifying two stages by electrolyzing flue gas using aluminum |
| CN102743951B (en) * | 2011-04-21 | 2016-02-10 | 贵阳铝镁设计研究院有限公司 | A kind of Asphalt smoke purification method and device |
| RU2668926C2 (en) * | 2017-02-16 | 2018-10-04 | Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" | Gas cleaning unit of cleaning electrolysis gases with gas-washing module containing a sleeve filter and reactor |
| CN110898568A (en) * | 2019-12-17 | 2020-03-24 | 云南云铝海鑫铝业有限公司 | Automatic material control system of flue gas purification dust remover |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2170309Y (en) * | 1993-05-21 | 1994-06-29 | 贾石明 | Self-baking anode side-inserted Al electrolytic cell with waste gas separation purifier |
| CN1128303A (en) * | 1994-12-21 | 1996-08-07 | 包头铝厂 | Self-baking aluminum electrolytic decontamination process |
| CN2289804Y (en) * | 1996-12-24 | 1998-09-02 | 党建平 | Alumium cell point-type blanking purifying reactor |
| CN1070387C (en) * | 1994-11-23 | 2001-09-05 | Abb·弗拉克特有限公司 | method for separating substances from a gaseous medium by dry adsorption |
| CN1083496C (en) * | 1998-06-22 | 2002-04-24 | 田应甫 | Dry fume purifying system for self-roasting anodic aluminium electrolysis |
| US6406524B1 (en) * | 1997-06-25 | 2002-06-18 | Abb Flakt Ab | Plant for removing fluor containing waste gases |
| CN1124368C (en) * | 1999-07-22 | 2003-10-15 | 中国长城铝业公司设计院 | Method for cleaning fluorinated flur gas produced by aluminium electrolysis |
| US20040076571A1 (en) * | 2002-10-16 | 2004-04-22 | Biothermica Technologies Inc. | Process for treating gaseous emissions generated during production of carbon anodes in an aluminum plant |
| US6726020B1 (en) * | 1998-09-17 | 2004-04-27 | ABB Fläkt AB | Method and device for a dry cleansing plant for aluminum reduction furnaces exhaust gas |
-
2004
- 2004-07-06 CN CNB2004100401592A patent/CN100362140C/en not_active Expired - Lifetime
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2170309Y (en) * | 1993-05-21 | 1994-06-29 | 贾石明 | Self-baking anode side-inserted Al electrolytic cell with waste gas separation purifier |
| CN1070387C (en) * | 1994-11-23 | 2001-09-05 | Abb·弗拉克特有限公司 | method for separating substances from a gaseous medium by dry adsorption |
| CN1128303A (en) * | 1994-12-21 | 1996-08-07 | 包头铝厂 | Self-baking aluminum electrolytic decontamination process |
| CN2289804Y (en) * | 1996-12-24 | 1998-09-02 | 党建平 | Alumium cell point-type blanking purifying reactor |
| US6406524B1 (en) * | 1997-06-25 | 2002-06-18 | Abb Flakt Ab | Plant for removing fluor containing waste gases |
| CN1083496C (en) * | 1998-06-22 | 2002-04-24 | 田应甫 | Dry fume purifying system for self-roasting anodic aluminium electrolysis |
| US6726020B1 (en) * | 1998-09-17 | 2004-04-27 | ABB Fläkt AB | Method and device for a dry cleansing plant for aluminum reduction furnaces exhaust gas |
| CN1124368C (en) * | 1999-07-22 | 2003-10-15 | 中国长城铝业公司设计院 | Method for cleaning fluorinated flur gas produced by aluminium electrolysis |
| US20040076571A1 (en) * | 2002-10-16 | 2004-04-22 | Biothermica Technologies Inc. | Process for treating gaseous emissions generated during production of carbon anodes in an aluminum plant |
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| Publication number | Publication date |
|---|---|
| CN1594664A (en) | 2005-03-16 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUIYANG ALUMINUM AND MAGNESIUM DESIGN INSTITUTE CO Free format text: FORMER NAME: GUIYANG ALUMINIUM AND MAGNESIUM DESIGN INST. |
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| CP03 | Change of name, title or address |
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. |