CN1442514A - Electrolytic bath gathering method - Google Patents
Electrolytic bath gathering method Download PDFInfo
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- CN1442514A CN1442514A CN 03111413 CN03111413A CN1442514A CN 1442514 A CN1442514 A CN 1442514A CN 03111413 CN03111413 CN 03111413 CN 03111413 A CN03111413 A CN 03111413A CN 1442514 A CN1442514 A CN 1442514A
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- electrolyzer
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Abstract
A gas collecting method for electrolyzer features that a segmental gas collection is used, that is, a gas collecting branch pipe is responsible to one of the segements of electrolyzer and all the branch pipes are converged to a gas-collecting trunk, so ensuring equal negative pressure to all branch pipes and high efficiency.
Description
Affiliated technical field
The present invention relates to a kind of gas collection method of electrolyzer flue gas.
Background technology
Along with the continuous progress of aluminum electrolysis technology, the capacity of electrolyzer is increasing, and the flue gas that produces in the electrolytic process (mainly is C0
2, CO, HF, CF
4) also constantly increase.In modern prebaked-anode type cell, negative electrode, upper mechanism and both sides and termination seal closure have formed an airtight space.Along the electrolyzer longitudinal cenlerline, a longitudinally elongated collecting pipe is installed on the electrolyzer burner hearth, to open than multiple hole in the vertical both sides and the termination of this collecting pipe, its end links to each other with purification system in the potroom; Because the effect of purification system blower fan forms negative pressure in this collecting pipe.Flue gas is heated and upwards spreads in the groove, enters pipeline by both sides and end hole, finally enters flue gas purification system.This gas collecting mode, along with the prolongation of pipeline, the negative pressure of pipeline is constantly lost, even afterbody does not have negative pressure.This single tube road gas collection is more suitable for the low capacity electrolyzer, for the large vol electrolyzer, because gas collection pipe is longer, the pressure-losses is big, and afterbody gas collection weak effect makes gas collecting efficiency not high, and cause the reduction of whole electrolyzer gas collecting efficiency, flue gas overflows, and influences environmental protection.This shows out at existing large vol electrolyzer.
Summary of the invention
Technical problem to be solved by this invention provides a kind of electrolyzer gas collection method, and it has improved the gas collecting efficiency of large vol electrolyzer.
The present invention is achieved in that the exhaust gas volumn difference at the electrolyzer generation of differing capacities, adopts the plurality of sections method of gas collection respectively.As, the 160kA electrolyzer can be divided into 2 sections gas collections, and the above electrolyzer of 300kA can be divided into 3～8 sections gas collections.So-called segmentation gas collection is about to electrolyzer and is divided into plurality of sections gas collection arm, and every gas collection bye-pass is mutually independently, finally is aggregated on the main header of electrolyzer end.According to pipe negative pressure and resistance balance method, determine the cross-sectional sizes of each bar gas collection bye-pass, on pipe connecting or elbow, establish adjustable valve simultaneously, adjust and flow into exhaust gas volumn, close with the negative pressure that guarantees each section gas collection.Like this, fundamentally solved the effuser each point negative pressure difference that existing gas collection method exists, even afterbody do not have the problem of negative pressure, improved gas collecting efficiency.
Advantage of the present invention and effect are: adopt the present invention, under the airtight situation of electrolyzer, improved the gas collecting efficiency of large vol electrolyzer, as electrolyzer to the 200kA capacity, effuser gas collecting mode in the past by a perforate, gas collecting efficiency is 88%～90%, and behind employing the present invention, gas collecting efficiency will reach 98%.
Below in conjunction with the drawings and specific embodiments the present invention is described in further details.
Description of drawings
Fig. 1 is that electrolyzer natural gas gathering system master looks synoptic diagram
Fig. 2 is an electrolyzer natural gas gathering system schematic top plan view
Embodiment
Be no more than 4000m under the mark condition according to single groove exhaust smoke level and each section gas collection bye-pass exhaust smoke level
3/ h determines the segments of segmentation gas collection; According to negative pressure and resistance balance principle, and arm exhaust smoke level, flue gas flow rate, determine the size of each gas collection bye-pass.With a certain 300kA electrolyzer is example, can be divided into 3 sections gas collections, and gas collection arm 2 distributes along the electrolyzer longitudinal cenlerline, and every section gas collection arm 2 is welded by steel plate or steel pipe, and the gas collection arm 2 of each section is separate; Wherein preceding two sections flue gases enter in the gas collection arm 2 by air inlet port on the gas collection arm 21 or gas skirt, and a communicating aperture 8 is set between gas collection arm 2 and the convergence tube 3, and flue gas enters convergence tube 3 by communicating aperture 8, enters main header 6 by elbow 4 again; Between the 3rd section gas collection arm 2 and the preceding two sections gas collection arms 2 isolate steel plate 9 of spacer segment from usefulness arranged, flue gas enters main header 6 by gas collection arm 2, pipe connecting 5 and adjustable valve 7.Main header 6 is connected with purification pipeline flange in the potroom.Adjustable valve 7 can be arranged on pipe connecting 5, also can be arranged on the elbow 4.
If adopt the gas skirt gas collecting mode, establish a gas skirt for every section, air inlet port 1 then is not set on the gas collection arm 2 so.
Claims (3)
1. electrolyzer gas collection method, it is characterized in that: the mode that adopts the segmentation gas collection, along the electrolyzer longitudinal cenlerline, amount of capacity by electrolyzer is divided into several gas collection sections, every section gas collection arm (2) is provided with some air inlet ports (1) or a gas skirt, the gas collection arm (2) of each section is separate, the end of convergence tube (3) is connected with pipe connecting (5), pipe connecting (5) gathers and is connected on the electrolyzer main header (6), purifies pipeline flange in main header (6) and the workshop and is connected; According to the requirement of each gas collection arm (2) negative-pressure balancing and flue gas flow, determine the size of each gas collection arm (2), go up installation adjustable valve (7) at convergence tube (3) or pipe connecting (5) simultaneously.
2. a kind of electrolyzer gas collection method according to claim 1 is characterized in that pressing the different segments of determining gas collections of amount of capacity of electrolyzer, is the electrolyzer of 160～500kA for capacity, and corresponding segments is 2～8 sections.
3. a kind of electrolyzer gas collection method according to claim 1 is characterized in that requiring and each section exhaust smoke level, flue gas flow rate are determined the cross section of each section arm according to negative pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111413 CN1202288C (en) | 2003-04-10 | 2003-04-10 | Electrolytic bath gathering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111413 CN1202288C (en) | 2003-04-10 | 2003-04-10 | Electrolytic bath gathering method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1442514A true CN1442514A (en) | 2003-09-17 |
| CN1202288C CN1202288C (en) | 2005-05-18 |
Family
ID=27796882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03111413 Expired - Fee Related CN1202288C (en) | 2003-04-10 | 2003-04-10 | Electrolytic bath gathering method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1202288C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094218A (en) * | 2009-12-11 | 2011-06-15 | 贵阳铝镁设计研究院 | Pore plate regulating valve for smoke discharging branch pipes of electrolysis bath |
| CN102485963A (en) * | 2010-12-02 | 2012-06-06 | 沈阳铝镁设计研究院有限公司 | Structure for controlling wind pressure balance of aluminium electrolysis-based purification flue gas pipeline |
| CN102995064A (en) * | 2012-12-24 | 2013-03-27 | 云南云铝涌鑫铝业有限公司 | Collecting device of smoke in electrolysis |
| CN106149007A (en) * | 2015-04-22 | 2016-11-23 | 沈阳铝镁科技有限公司 | Aluminum electrolyzing cell used multistage stand alone type gas collection lower flue structure |
| CN109136994A (en) * | 2017-06-13 | 2019-01-04 | 沈阳铝镁设计研究院有限公司 | Large space frame-type gas collection lower flue structure |
| CN110042432A (en) * | 2019-05-05 | 2019-07-23 | 中南大学 | The closed gas collecting apparatus of aluminium cell |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460568C (en) * | 2005-09-20 | 2009-02-11 | 东北大学设计研究院（有限公司） | Exhaust method and apparatus for aluminium electrolysis pre-baking tank |
-
2003
- 2003-04-10 CN CN 03111413 patent/CN1202288C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094218A (en) * | 2009-12-11 | 2011-06-15 | 贵阳铝镁设计研究院 | Pore plate regulating valve for smoke discharging branch pipes of electrolysis bath |
| CN102485963A (en) * | 2010-12-02 | 2012-06-06 | 沈阳铝镁设计研究院有限公司 | Structure for controlling wind pressure balance of aluminium electrolysis-based purification flue gas pipeline |
| CN102995064A (en) * | 2012-12-24 | 2013-03-27 | 云南云铝涌鑫铝业有限公司 | Collecting device of smoke in electrolysis |
| CN106149007A (en) * | 2015-04-22 | 2016-11-23 | 沈阳铝镁科技有限公司 | Aluminum electrolyzing cell used multistage stand alone type gas collection lower flue structure |
| CN109136994A (en) * | 2017-06-13 | 2019-01-04 | 沈阳铝镁设计研究院有限公司 | Large space frame-type gas collection lower flue structure |
| CN110042432A (en) * | 2019-05-05 | 2019-07-23 | 中南大学 | The closed gas collecting apparatus of aluminium cell |
| CN110042432B (en) * | 2019-05-05 | 2020-06-05 | 中南大学 | Closed gas collecting device for aluminum electrolytic cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1202288C (en) | 2005-05-18 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050518 Termination date: 20110410 |