AU2007324225A1 - A two-stage aluminum fluoride recycling system and process of tail gas condensate from the aluminum fluoride producing system - Google Patents
A two-stage aluminum fluoride recycling system and process of tail gas condensate from the aluminum fluoride producing system Download PDFInfo
- Publication number
- AU2007324225A1 AU2007324225A1 AU2007324225A AU2007324225A AU2007324225A1 AU 2007324225 A1 AU2007324225 A1 AU 2007324225A1 AU 2007324225 A AU2007324225 A AU 2007324225A AU 2007324225 A AU2007324225 A AU 2007324225A AU 2007324225 A1 AU2007324225 A1 AU 2007324225A1
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- AU
- Australia
- Prior art keywords
- aluminum fluoride
- tail gas
- gas condensate
- production system
- buffer tank
- 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.)
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/50—Fluorides
Description
FPME07140088 Two-Stage Recovery System And Process For Recovering Aluminum Fluoride From Tail Gas Condensate In An Aluminum Fluoride Production System Field of the Invention This invention relates to technical field of metallurgy and chemical production, and more particularly, to a two-stage recovery system and process for recovering aluminum fluoride from tail gas condensate produced by a fluidized bed reactor in aluminum fluoride production. Background of the Invention In the present aluminum fluoride production process, the tail gas from an aluminum fluoride production system, which contains a small amount of aluminum fluoride, is sprayed by water and then forms a condensed liquid (also referred to "tail gas condensate" hereinafter). The tail gas condensate, after exchanging heat in a heat exchanger, passes through a flat bottom buffer tank into a sedimentation tank for precipitating. The clear overflow liquid in the sedimentation tank is returned to the aluminum fluoride production section as a circulation liquid for recycling use. The precipitated material in the sedimentation tank is dried as a recovered substance and is mixed with finished aluminum fluoride in a certain proportion for selling. Such a production process has the following technical defects: 1. During the condensed liquid is being stored in the flat bottom buffer tank, aluminum fluoride is precipitated. After the precipitated material reaches to a certain level, it needs to shut down the tank for cleaning up the precipitated material. The cleaning is very difficult and will significantly affect the normal production. 2. The aluminum fluoride content in the tail gas condensate in the sedimentation tank is still very high and thus the recovery rate is low. The sedimentation tank needs to be cleaned up frequently and thus the labor intensity is great. Summary of the Invention In order to solve the aforesaid technical problem, this invention provides a two-stage recovery system and process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system with an object to increase the recovery rate of aluminum fluoride, extend the production period, and relieve problem of excessive labor intensity that appears due to manually cleaning up the precipitated material during production. In a first aspect of the invention, a two-stage recovery process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system comprises steps: a tail gas condensate produced by the aluminum fluoride production system enters a buffer tank for storage; the tail gas condensate flow out from the buffer tank experiences a solid-liquid separation, thereby producing a first solid aluminum fluoride and a solution separated each other; the solution is sent into a sedimentation tank for precipitating, thereby producing a second precipitated solid aluminum fluoride and a clear overflow liquid in the sedimentation tank; and the clear overflow liquid from the sedimentation tank returns to the aluminum fluoride production system. Preferably, an overflow from said buffer tank enters the sedimentation tank. Preferably, said buffer tank is a cone-bottom buffer tank. Preferably, said tail gas condensate enters the buffer tank after being cooled. Preferably, said tail gas condensate is cooled by a graphite cooler. Preferably, the solid-liquid separation for the tail gas condensate is achieved by a horizontal spiral discharge centrifuge. Preferably, said tail gas condensate enters the horizontal spiral discharge centrifuge via a centrifugal feed pump from the buffer tank. Preferably, the first solid aluminum fluoride is conveyed to an aluminum fluoride stack for natural air-drying. Preferably, the second solid aluminum fluoride is conveyed to an aluminum fluoride stack for natural air-drying. Preferably, said clear overflow liquid in the sedimentation tank is returned to the 2 aluminum fluoride production system via a circulating pump for tail gas condensate. In a second aspect of the invention, a two-stage recovery system for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system, comprises: a buffer tank in communication with a discharge port of the aluminum fluoride production system; a discharge centrifuge being in communication with a first discharge port of the buffer tank and performing a solid-liquid separation for the tail gas condensate from the buffer tank; a sedimentation tank in communication with the discharge centrifuge; and a circulating pump for the tail gas being communication with a discharge port of the sedimentation tank, a discharge port of the circulating pump being communication with a feed port of the aluminum fluoride production system. Preferably, a cooler is disposed between the discharge port of the aluminum fluoride production system and the buffer tank. Preferably, said cooler is a graphite cooler. Preferably, said buffer tank is a cone-bottom buffer tank. Preferably, said discharge centrifuge is a horizontal spiral discharge centrifuge. Preferably, a second discharge port of the buffer tank is in communication with the sedimentation tank. Preferably, centrifugal feed pump is disposed between the buffer tank and the discharge centrifuge. Preferably, the two-stage recovery system further comprises an aluminum fluoride stack for receiving the solid aluminum fluoride from the discharge centrifuge and/or the sedimentation tank and naturally air-drying of said solid aluminum fluoride. This invention has the following advantages and effects: this invention recovers the aluminum fluoride in the tail gas condensate sufficiently by performing a two-stage separation of the tail gas condensate and thus has a high recovery rate and, at the same time, relieves the labor intensity of the workers due to frequent cleaning of the flat bottom buffer tank and the sedimentation tank. 3 Description of Drawings Figure 1 is a schematic structure of the two-stage recovery system for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to the invention. Numeral Reference List: I graphite cooler 2 cone-bottom buffer tank 3 centrifugal feed pump 4 horizontal spiral discharge centrifuge 5 sedimentation tank 6 circulating pump for tail gas condensate 7 aluminum fluoride stack 8 aluminum fluoride production system. Mode of Carrying out the Invention The embodiment of this invention will be described hereinafter in details with reference to drawings. However, the scope of protection of this invention is not limited to the embodiment. A two-stage recovery process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system comprises the following process steps. The tail gas condensate produced by an aluminum fluoride production system 8 enters a graphite cooler I to exchange heat for cooling. The cooled tail gas condensate enters a cone-bottom buffer tank 2 for storage. The tail gas condensate stored in the cone-bottom buffer tank 2 enters a horizontal spiral discharge centrifuge 4 via a centrifugal feed pump 3 for solid-liquid separation under the action of the horizontal spiral discharge centrifuge 4. Thus, a portion of the solid aluminum fluoride in the tail gas condensate is separated from the solution of the tail gas condensate, thereby accomplishing the first stage of separation operation. The separated aluminum fluoride is sent to an aluminum fluoride stack 7 for natural air-drying, and the separated solution from the horizontal spiral discharge centrifuge 4 enters the sedimentation tank 5 for 4 precipitating. The overflow from the buffer tank 2 may also enter the sedimentation tank 5. The clear overflow liquid in the sedimentation tank 5 is returned to the aluminum fluoride production system 8 via a circulating pump 6 for tail gas condensate. The precipitated material on the bottom of the sedimentation tank 5 is taken out by a manual cleaning way and is also sent to the aluminum fluoride stack 7 for natural air-drying, thereby accomplishing the second stage of separation operation. As shown in figurel, the structure of the two-stage recovery system for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system is described hereinafter. The recovery system comprises a graphite cooler I connected to a discharge port of aluminum fluoride production system 8. A cone-bottom buffer tank 2 is connected to the discharge port of the graphite cooler. A discharge port of the cone-bottom buffer tank 2 is connected to a sedimentation tank 5 for conveying the overflow from the cone-bottom buffer tank 2 to the sedimentation tank 5. Another discharge port of the cone-bottom buffer tank 2 is connected to an inlet of a centrifugal feed pump 3, and an outlet of the centrifugal feed pump 3 is connected to a horizontal spiral discharge centrifuge 4, thereby conveying the tail gas condensate from the buffer tank 2 to the horizontal spiral discharge centrifuge 4 for solid-liquid separation. The two discharge ports of the horizontal spiral discharge centrifuge 4 are connected to the sedimentation tank 5 and the aluminum fluoride stack 7, respectively. The discharge port of the sedimentation tank 5 is connected to a circulating pump 6. The discharge port of the circulating pump 6 is connected to the feed port of the aluminum fluoride production system 8. 5
Claims (18)
1. A two-stage recovery process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system, comprising steps: a tail gas condensate produced by the aluminum fluoride production system enters a buffer tank for storage; the tail gas condensate flow out from the buffer tank experiences a solid-liquid separation, thereby producing a first solid aluminum fluoride and a solution separated each other; the solution is sent into a sedimentation tank for precipitating, thereby producing a second precipitated solid aluminum fluoride and a clear overflow liquid in the sedimentation tank; and the clear overflow liquid from the sedimentation tank returns to the aluminum fluoride production system.
2. The two-stage recovery process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim 1, characterized in that an overflow from said buffer tank enters the sedimentation tank.
3. The two-stage recovery process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim I or 2, characterized in that said buffer tank is a cone-bottom buffer tank.
4. The two-stage recovery process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim 1, characterized in that said tail gas condensate enters the buffer tank after being cooled.
5. The two-stage recovery process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim 4, characterized in that said tail gas condensate is cooled by a graphite cooler. 6
6. The two-stage recovery process for recovering aluminum fluoride from tail gas condensate from by an aluminum fluoride production system according to claim 1, characterized in that the solid-liquid separation for the tail gas condensate is achieved by a horizontal spiral discharge centrifuge.
7. The two-stage recovery process for recovering aluminum fluoride from tail gas condensate from by an aluminum fluoride production system according to claim 6, characterized in that said tail gas condensate enters the horizontal spiral discharge centrifuge via a centrifugal feed pump from the buffer tank.
8. The two-stage recovery process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim 1, characterized in that the first solid aluminum fluoride is conveyed to an aluminum fluoride stack for natural air-drying.
9. The two-stage recovery process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim I or 8, characterized in that the second solid aluminum fluoride is conveyed to an aluminum fluoride stack for natural air-drying.
10. The two-stage recovery process for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim 1, characterized in that said clear overflow liquid in the sedimentation tank is returned to the aluminum fluoride production system via a circulating pump for tail gas condensate.
11. A two-stage recovery system for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system, comprising: a buffer tank in communication with a discharge port of the aluminum fluoride production system; a discharge centrifuge being in communication with a first discharge port of the buffer tank and performing a solid-liquid separation for the tail gas condensate from the 7 buffer tank; a sedimentation tank in communication with the discharge centrifuge; and a circulating pump for the tail gas being communication with a discharge port of the sedimentation tank, a discharge port of the circulating pump being communication with a feed port of the aluminum fluoride production system.
12. The two-stage recovery system for recovering aluminum fluoride from tail gas condensate from by an aluminum fluoride production system according to claim 11, characterized in that a cooler is disposed between the discharge port of the aluminum fluoride production system and the buffer tank.
13. The two-stage recovery system for recovering aluminum fluoride from tail gas condensate from by an aluminum fluoride production system according to claim 12, characterized in that said cooler is a graphite cooler.
14. The two-stage recovery system for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim 12, characterized in that said buffer tank is a cone-bottom buffer tank.
15. The two-stage recovery system for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim 12, characterized in that said discharge centrifuge is a horizontal spiral discharge centrifuge.
16. The two-stage recovery system for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim 12, characterized in that a second discharge port of the buffer tank is in communication with the sedimentation tank.
17. The two-stage recovery system for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim 12, characterized in that a centrifugal feed pump is disposed between the buffer tank and the 8 discharge centrifuge.
18. The two-stage recovery system for recovering aluminum fluoride from tail gas condensate from an aluminum fluoride production system according to claim 12, further comprising an aluminum fluoride stack for receiving the solid aluminum fluoride from the discharge centrifuge and/or the sedimentation tank and naturally air-drying of said solid aluminum fluoride. 9
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610134343.2 | 2006-11-23 | ||
| CNB2006101343432A CN100475702C (en) | 2006-11-23 | 2006-11-23 | System and process for two-stage type reclaiming of aluminum fluoride from tail gas condensate of aluminum fluoride production system |
| PCT/CN2007/003217 WO2008061435A1 (en) | 2006-11-23 | 2007-11-14 | A two-stage aluminum fluoride recycling system and process of tail gas condensate from the aluminum fluoride producing system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| AU2007324225A1 true AU2007324225A1 (en) | 2008-05-29 |
| AU2007324225A8 AU2007324225A8 (en) | 2009-05-28 |
| AU2007324225B2 AU2007324225B2 (en) | 2010-11-25 |
Family
ID=38081705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2007324225A Active AU2007324225B2 (en) | 2006-11-23 | 2007-11-14 | A two-stage aluminum fluoride recycling system and process of tail gas condensate from the aluminum fluoride producing system |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN100475702C (en) |
| AU (1) | AU2007324225B2 (en) |
| SA (1) | SA07280632B1 (en) |
| WO (1) | WO2008061435A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100475702C (en) * | 2006-11-23 | 2009-04-08 | 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 |
| CN101648087B (en) * | 2008-08-12 | 2011-12-21 | 沈阳铝镁设计研究院有限公司 | Tail gas washing liquid precipitate recovery process and system in aluminum fluoride production |
| CN106224749A (en) * | 2016-08-23 | 2016-12-14 | 江苏兴达钢帘线股份有限公司 | Water tank lubricant online settling circulation system |
| CN112520770B (en) * | 2020-12-17 | 2023-04-07 | 河南东方韶星实业有限公司 | Comprehensive utilization method of atmospheric condensate |
| CN113217344A (en) * | 2021-06-17 | 2021-08-06 | 铜陵泰富特种材料有限公司 | Condensate discharging method for gas compressor |
| CN116651157B (en) * | 2023-08-01 | 2023-12-01 | 张掖市三益化工外贸有限公司 | Tail gas integrated treatment equipment for high-purity aluminum fluoride production |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5955042A (en) * | 1995-12-08 | 1999-09-21 | Goldendale Aluminum Company | Method of treating spent potliner material from aluminum reduction cells |
| JPH1192137A (en) * | 1997-09-19 | 1999-04-06 | Onoda Chemical Industry Co Ltd | Production of aluminum fluoride particles |
| CN100475702C (en) * | 2006-11-23 | 2009-04-08 | 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 |
-
2006
- 2006-11-23 CN CNB2006101343432A patent/CN100475702C/en not_active Expired - Fee Related
-
2007
- 2007-11-14 WO PCT/CN2007/003217 patent/WO2008061435A1/en active Application Filing
- 2007-11-14 AU AU2007324225A patent/AU2007324225B2/en active Active
- 2007-11-21 SA SA07280632A patent/SA07280632B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU2007324225A8 (en) | 2009-05-28 |
| CN1962450A (en) | 2007-05-16 |
| WO2008061435A1 (en) | 2008-05-29 |
| AU2007324225B2 (en) | 2010-11-25 |
| SA07280632B1 (en) | 2010-12-01 |
| CN100475702C (en) | 2009-04-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TH | Corrigenda |
Free format text: IN VOL 23, NO 19, PAGE(S) 8152 UNDER THE HEADING PCT APPLICATIONS THAT HAVE ENTERED THE NATIONAL PHASE - NAME INDEX UNDER THE NAME CHINA ALUMINIUM INTERNATIONAL ENGINEERING CORPORATION LIMITED, APPLICATION NO. 2007324225, UNDER INID (71), CORRECT THE APPLICANT NAME TO CHINA ALUMINUM INTERNATIONAL ENGINEERING CORPORATION LIMITED |
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| FGA | Letters patent sealed or granted (standard patent) |