CN101648087B - Tail gas washing liquid precipitate recovery process and system in aluminum fluoride production - Google Patents
Tail gas washing liquid precipitate recovery process and system in aluminum fluoride production Download PDFInfo
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- CN101648087B CN101648087B CN2008100127613A CN200810012761A CN101648087B CN 101648087 B CN101648087 B CN 101648087B CN 2008100127613 A CN2008100127613 A CN 2008100127613A CN 200810012761 A CN200810012761 A CN 200810012761A CN 101648087 B CN101648087 B CN 101648087B
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- tail gas
- washing liquid
- gas washing
- hydrocyclone
- aluminum fluoride
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Abstract
The invention relates to a tail gas washing liquid precipitate recovery process and a tail gas washing liquid precipitate recovery system in aluminum fluoride production. The tail gas washing liquid precipitate recovery process in the aluminum fluoride production comprises the following steps that: the tail gas washing liquid is sent into a hydraulic cyclone; the hydraulic cyclone performs flow separation on the tail gas washing liquid; the over flow of the hydraulic cyclone enters a collecting tank, and the base flow of the hydraulic cyclone enters a spiral centrifugal classifier; a solid phase separated by the spiral centrifugal classifier is taken as a solid-phase precipitate material and sent into a precipitate material storage area, and the separated liquid phase enters the collecting tank; and the liquid in the collecting tank is sent into a wastewater treatment system. The process has the advantages that: the process adopts the series connection operation of the hydraulic cyclone and the centrifugal classifier, can recover the precipitate in the tail gas washing liquid furthest, and simultaneously ensures low water content of the recovered precipitate. The process has low investment, stable operation, good production indexes, and good application prospect in the aluminum fluoride production.
Description
Technical field
The present invention relates to a kind of tail gas washing liquid precipitate recovery process and system, relate in particular to the technology and the system that reclaim tail gas washing liquid precipitate in the aluminum fluoride production procedure.
Background technology
Aluminum fluoride particularly in 1.5 ten thousand tons of/year aluminum fluoride production technologies of BUSS company, contains aluminum fluoride, dust such as aluminum fluosilicate in the aluminum fluoride fluidized-bed reactor tail gas in producing.Tail gas is through after the washing repeatedly, discharges reach the national standard of low dustiness in gas component after, and the most dust in the tail gas then enter into tail gas washing liquid.In the production procedure that has, this part tail gas washing liquid is directly carried and is removed Waste Water Treatment, handles back up to standard discharging.
Since contain in the tail gas washing liquid sediment---be aluminum fluoride, the aluminum fluosilicate dust has very high economic worth, therefore present most of aluminum fluoride manufacturing enterprise all wishes to reclaim this part sediment.
The sludge processes that reclaims tail gas washing liquid is the precipitation method, and promptly tail gas washing liquid enters large-scale sedimentation basin, and through the post precipitation of certain hour, clear liquid enters Waste Water Treatment, and glar takes out by the method in artificial clear pond, realizes that the precipitation material reclaims.
Such production technology has following 4 drawbacks:
1. large-scale sedimentation basin is open-air sedimentation basin, and the washing tail gas liquid temp of being discharged by aluminum fluoride production system is approximately 60 ℃, and it is continuous released vapour in precipitation process, is unfavorable for environmental protection.
2. not only construction investment is big to adopt large-scale sedimentation basin, and takes up an area of greatly the gross investment height.
3. the hydrofluoric acid that contains 1% left and right sides content in the tail gas washing liquid carries out clearly the pond again and reclaims sediment even tail gas washing liquid all extracted out outside the pond, also still contain the hydrofluoric acid liquid of a certain amount of low concentration in the sediment.Be difficult to avoid people's skin not touch hydrofluoric acid liquid in the sediment in the operating process, such production operation is dangerous big, is unfavorable for protecting health of operators.
4. use the mode means in artificial clear pond to fall behind, labour intensity is big.
Summary of the invention
In order to solve the problems of the technologies described above tail gas washing liquid precipitate recovery process and the system in a kind of aluminum fluoride production that the invention provides, purpose is to improve recycling precipitate efficient, reduces labour intensity, reduces investment simultaneously.
Be achieved in that tail gas washing liquid precipitate recovery process in the aluminum fluoride production for reaching above-mentioned purpose the present invention, it is characterized in that comprising the steps: tail gas washing liquid is delivered to dashpot earlier, pass through first centrifugal pumping again to hydrocyclone; Hydrocyclone is shunted tail gas washing liquid; The overflow of hydrocyclone enters collecting tank, and the underflow of hydrocyclone enters the spiral centrifugal classifying; The spiral centrifugal classifying separates solid phase and sends into precipitation stockpile field as the solid phase precipitation material, and the liquid phase of separation enters collecting tank; Liquid is sent into Waste Water Treatment in the collecting tank.
Describedly when being delivered to dashpot earlier, tail gas washing liquid also compressed air is delivered to dashpot.
The rinse water of carrying by flushing pipe after described hydrocyclone and spiral centrifugal classifying quit work is cleaned hydrocyclone and spiral centrifugal classifying.
Liquid passes through second centrifugal pumping to Waste Water Treatment in the described collecting tank.
The system that tail gas washing liquid precipitate reclaimed during aluminum fluoride was produced, comprise hydrocyclone, the import of hydrocyclone is connected with the tail gas washing liquid carrier pipe, hydrocyclone is shunted tail gas washing liquid, the overfall of hydrocyclone is communicated with collecting tank by pipeline, the underflow opening of hydrocyclone is communicated with the spiral centrifugal classifying by pipeline, the solid outlet of spiral centrifugal classifying leads to precipitation stockpile field, the liquid outlet of spiral centrifugal classifying is communicated with collecting tank by pipeline, and collecting tank is communicated with Waste Water Treatment by pipeline; Between the import of hydrocyclone and tail gas washing liquid carrier pipe, be provided with dashpot.
Described first centrifugal pump that between dashpot and hydrocyclone, is provided with.
Be provided with valve and flushing pipe on the described pipeline between first centrifugal pump and hydrocyclone.
Described dashpot communicates with compressed air hose.
Described dashpot is etch-proof polypropylene material.
It is that etch-proof perfluoroethylene-propylene material is made that described first centrifugal pump adopts liner.
Described hydrocyclone adopts etch-proof polypropylene material.
The steel lining of described hydrocyclone is polypropylene or rubber.
The liner of described spiral centrifugal classifying is an anticorrosion rubber.
Described collecting tank is etch-proof polypropylene material.
Advantage of the present invention and effect are as follows: adopt the work in tandem of hydrocyclone and centrifugal classifying, can reclaim sediment in the tail gas washing liquid to greatest extent, guarantee the sedimentary low-water-content that reclaims simultaneously.The charging of centrifugal classifying requires that certain pressure is arranged, and in this technology, the charging of centrifugal classifying is pressed by the charging centrifugal pump of hydrocyclone and realized, pump need not additionally be set again.This technology investment is low, stable operation, and production target is good, and fabulous application prospect is arranged in aluminum fluoride production.
Description of drawings
Fig. 1 is a flow chart of the present invention
Among the figure: 1, dashpot; 2, first centrifugal pump; 3, hydrocyclone; 4, overfall; 5, underflow opening; 6, spiral centrifugal classifying; 7, solid phase outlet; 8, liquid phase outlet; 9, collecting tank; 10, second centrifugal pump; 11, valve; 12, flushing pipe; 13, tail gas washing liquid carrier pipe; 14, compressed air hose; 15, Waste Water Treatment.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing:
Tail gas washing liquid precipitate recovery process during aluminum fluoride is produced as shown in Figure 1 comprises the steps: tail gas washing liquid is delivered to dashpot earlier, also compressed air is delivered to dashpot when tail gas washing liquid is delivered to dashpot earlier; Pass through first centrifugal pumping again to hydrocyclone; Tail gas washing liquid is delivered to hydrocyclone from dashpot; Hydrocyclone is shunted tail gas washing liquid; The overflow of hydrocyclone enters collecting tank, and the underflow of hydrocyclone enters the spiral centrifugal classifying; The spiral centrifugal classifying separates solid phase and sends into precipitation stockpile field as the solid phase precipitation material, and the liquid phase of separation enters collecting tank; Liquid passes through second centrifugal pumping to Waste Water Treatment in the collecting tank.The rinse water of carrying by flushing pipe after hydrocyclone and spiral centrifugal classifying quit work is cleaned hydrocyclone and spiral centrifugal classifying.
The system that tail gas washing liquid precipitate reclaimed during aluminum fluoride was produced, comprise hydrocyclone 3, the import of hydrocyclone 3 is connected with tail gas washing liquid carrier pipe 13, between the import of hydrocyclone 3 and tail gas washing liquid carrier pipe 13, be provided with dashpot 1, dashpot 1 communicates with compressed air hose 14, compressed air hose 14 feeds in the dashpot 1, for realizing in the dashpot 1 that compressed air stirs operation, prevent that sediment from depositing in dashpot 1, tail gas washing liquid enters and only does of short duration storage in the dashpot 1, dashpot 1 is etch-proof polypropylene material, between dashpot 1 and hydrocyclone 3, be provided with first centrifugal pump 2, it is etch-proof perfluoroethylene-propylene material that first centrifugal pump 2 adopts liner, on the pipeline between first centrifugal pump 2 and the hydrocyclone 3, be provided with valve 11, between valve 11 and hydrocyclone 3, be provided with flushing pipe 12, flushing pipe is provided with valve, hydrocyclone 3 adopts etch-proof polypropylene material, the steel lining of hydrocyclone 3 is polypropylene or rubber, hydrocyclone 3 is shunted tail gas washing liquid, the overfall 4 of hydrocyclone 3 is communicated with collecting tank 9 by pipeline, the underflow opening 5 of hydrocyclone 3 is communicated with spiral centrifugal classifying 6 by pipeline, the liner of spiral centrifugal classifying 6 is an anticorrosion rubber, the solid outlet of spiral centrifugal classifying 6 leads to precipitation stockpile field, the liquid outlet of spiral centrifugal classifying 6 is communicated with collecting tank 9 by pipeline, collecting tank 9 is etch-proof polypropylene material, collecting tank 9 is communicated with Waste Water Treatment by pipeline, is provided with second centrifugal pump 10 between collecting tank 9 and Waste Water Treatment 15.
Operation principle of the present invention:
Tail gas washing liquid enters in the dashpot, delivers into hydroclone classification by centrifugal pump.The hydrocyclone overflow enters collecting tank, and the hydrocyclone underflow enters the spiral centrifugal classifying and carries out centrifugation.Solid phase after the separation enters precipitation stockpile field and stores up, and the liquid phase after the separation enters collecting tank, removes Waste Water Treatment by pumping again.
Claims (13)
1. tail gas washing liquid precipitate recovery process during aluminum fluoride is produced is characterized in that comprising the steps: tail gas washing liquid is delivered to dashpot earlier, passes through first centrifugal pumping again to hydrocyclone; Hydrocyclone is shunted tail gas washing liquid; The overflow of hydrocyclone enters collecting tank, and the underflow of hydrocyclone enters the spiral centrifugal classifying; The spiral centrifugal classifying separates solid phase and sends into precipitation stockpile field as the solid phase precipitation material, and the liquid phase of separation enters collecting tank; Liquid is sent into Waste Water Treatment in the collecting tank.
2. tail gas washing liquid precipitate recovery process during aluminum fluoride according to claim 1 is produced is also delivered to dashpot with compressed air when it is characterized in that tail gas washing liquid delivered to dashpot earlier.
3. tail gas washing liquid precipitate recovery process during aluminum fluoride according to claim 1 is produced is characterized in that cleaning hydrocyclone and spiral centrifugal classifying by the rinse water of flushing pipe conveying after described hydrocyclone and spiral centrifugal classifying quit work.
4. tail gas washing liquid precipitate recovery process during aluminum fluoride according to claim 1 is produced is characterized in that liquid passes through second centrifugal pumping to Waste Water Treatment in the collecting tank.
5. the system that tail gas washing liquid precipitate reclaimed during aluminum fluoride was produced, it is characterized in that comprising hydrocyclone, the import of hydrocyclone is connected with the tail gas washing liquid carrier pipe, hydrocyclone is shunted tail gas washing liquid, the overfall of hydrocyclone is communicated with collecting tank by pipeline, the underflow opening of hydrocyclone is communicated with the spiral centrifugal classifying by pipeline, the solid outlet of spiral centrifugal classifying leads to precipitation stockpile field, the liquid outlet of spiral centrifugal classifying is communicated with collecting tank by pipeline, and collecting tank is communicated with Waste Water Treatment by pipeline; Between the import of hydrocyclone and tail gas washing liquid carrier pipe, be provided with dashpot.
6. the system that tail gas washing liquid precipitate reclaimed during aluminum fluoride according to claim 5 was produced is characterized in that being provided with first centrifugal pump between dashpot and hydrocyclone.
7. the system that tail gas washing liquid precipitate reclaimed during aluminum fluoride according to claim 6 was produced is characterized in that being provided with valve and flushing pipe on the pipeline between first centrifugal pump and the hydrocyclone.
8. the system that tail gas washing liquid precipitate reclaimed during aluminum fluoride according to claim 5 was produced is characterized in that dashpot communicates with compressed air hose.
9. the system that tail gas washing liquid precipitate reclaims in producing according to claim 5,6 or 8 described aluminum fluorides is characterized in that dashpot is etch-proof polypropylene material.
10. the system that reclaims according to tail gas washing liquid precipitate in claim 6 or the 7 described aluminum fluorides productions is characterized in that it is that etch-proof perfluoroethylene-propylene material is made that first centrifugal pump adopts liner.
11. the system according to tail gas washing liquid precipitate in claim 5, the 6 or 7 described aluminum fluorides productions reclaims is characterized in that hydrocyclone adopts etch-proof polypropylene material.
The system that tail gas washing liquid precipitate reclaimed during 12. aluminum fluoride according to claim 5 was produced, the liner that it is characterized in that the spiral centrifugal classifying is an anticorrosion rubber.
13. the system that tail gas washing liquid precipitate reclaimed during aluminum fluoride according to claim 5 was produced is characterized in that described collecting tank is etch-proof polypropylene material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100127613A CN101648087B (en) | 2008-08-12 | 2008-08-12 | Tail gas washing liquid precipitate recovery process and system in aluminum fluoride production |
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| CN2008100127613A CN101648087B (en) | 2008-08-12 | 2008-08-12 | Tail gas washing liquid precipitate recovery process and system in aluminum fluoride production |
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| CN101648087A CN101648087A (en) | 2010-02-17 |
| CN101648087B true CN101648087B (en) | 2011-12-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102676813B (en) * | 2012-04-18 | 2014-05-07 | 赣州腾远钴业有限公司 | New process for treating interphase dirt produced by P204 extraction system |
| CN117771850A (en) * | 2024-02-26 | 2024-03-29 | 多氟多（昆明）科技开发有限公司 | Dust removal heat sink is used in aluminium fluoride production |
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| DE19903011A1 (en) * | 1999-01-26 | 2000-08-03 | Akw Apparate Verfahren | Separation and disposal of sandy fraction in processing bauxite involves removing aqueous sodium hydroxide solution from hot mixture in hydrocyclone and separating sand, red mud and residual solution on screen |
| CN1648049A (en) * | 2005-01-11 | 2005-08-03 | 上海申川环保科技有限公司 | Method and device for producing thiamine from sulfur dioxide in recorered smoke |
| CN1868932A (en) * | 2006-06-05 | 2006-11-29 | 贵阳铝镁设计研究院 | Red mud settling sand removing method in aluminium oxide production |
| CN1962450A (en) * | 2006-11-23 | 2007-05-16 | 沈阳铝镁设计研究院 | System and process for two-stage type reclaiming of aluminum fluoride from tail gas condensate of aluminum fluoride production system |
| CN101023029A (en) * | 2004-09-21 | 2007-08-22 | 普基铝业 | Improvement to bayer process for making alumina trihydrate, said improvement concerning the separation of aluminate liquor and insoluble residues |
| CN201324674Y (en) * | 2008-12-03 | 2009-10-14 | 沈阳铝镁设计研究院 | Precipitate recovery system |
-
2008
- 2008-08-12 CN CN2008100127613A patent/CN101648087B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19903011A1 (en) * | 1999-01-26 | 2000-08-03 | Akw Apparate Verfahren | Separation and disposal of sandy fraction in processing bauxite involves removing aqueous sodium hydroxide solution from hot mixture in hydrocyclone and separating sand, red mud and residual solution on screen |
| CN101023029A (en) * | 2004-09-21 | 2007-08-22 | 普基铝业 | Improvement to bayer process for making alumina trihydrate, said improvement concerning the separation of aluminate liquor and insoluble residues |
| CN1648049A (en) * | 2005-01-11 | 2005-08-03 | 上海申川环保科技有限公司 | Method and device for producing thiamine from sulfur dioxide in recorered smoke |
| CN1868932A (en) * | 2006-06-05 | 2006-11-29 | 贵阳铝镁设计研究院 | Red mud settling sand removing method in aluminium oxide production |
| CN1962450A (en) * | 2006-11-23 | 2007-05-16 | 沈阳铝镁设计研究院 | System and process for two-stage type reclaiming of aluminum fluoride from tail gas condensate of aluminum fluoride production system |
| CN201324674Y (en) * | 2008-12-03 | 2009-10-14 | 沈阳铝镁设计研究院 | Precipitate recovery system |
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