CN103086407A - Seed precipitation mother liquor defoaming method and system - Google Patents
Seed precipitation mother liquor defoaming method and system Download PDFInfo
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- CN103086407A CN103086407A CN2011103390759A CN201110339075A CN103086407A CN 103086407 A CN103086407 A CN 103086407A CN 2011103390759 A CN2011103390759 A CN 2011103390759A CN 201110339075 A CN201110339075 A CN 201110339075A CN 103086407 A CN103086407 A CN 103086407A
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- precipitation solution
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The invention relates to a defoaming method, and especially relates to a simple method and a simple system for eliminating foam of seed precipitation mother liquor produced in an alumina production process when aluminum hydroxide crystal seeds are filtered by using a filter. The seed precipitation mother liquor defoaming method is characterized in that a branched pipe is arranged on a seed precipitation mother liquor pipe continuously delivers to a fine liquid cooling process, such that a part of seed precipitation mother liquor is delivered back to a filtration liquid tank; and returned seed precipitation mother liquor is sprayed to the filtration liquid tank through a spraying device arranged on the end of the branches pipe. The method and the system has the advantages and effects that: the process flow is continuous, and artificial operating is basically not needed; spraying device outlet pressure and branched pipe flow rate can be adjusted according to different foaming statuses, such that the method and the system have a wide application range over seed precipitation mother liquor under different process conditions, wherein only the additional investment of a small amount of added pipe materials and spray heads is needed; with the method, circulation amount is increased, but the defoaming effect is substantial, such that enterprise production and operation environments are improved, filtration liquid pump flow rate is reduced, and energy-saving and effect-enhancing effects are provided.
Description
Technical field
The present invention relates to a kind of debubbling method, relate in particular to and use the method and system that produce foam when filter filtration aluminium hydroxide crystal seed generation filtrate is seed precipitation solution in a kind of easy elimination alumina producing.
Background technology
At present, bayer process has become the leading technique of producing in the world aluminum oxide, in Bayer process, dissolution fluid is isolated through dilution and is obtained seminal fluid after red mud is lowered the temperature again, aluminium hydroxide is that seminal fluid is that the seed decomposition technique makes by adding aluminium hydroxide crystal seed, the aluminium hydroxide crystal seed of separating out from seminal fluid need be through filtering to reduce the subsidiary sodium aluminate solution in its surface, otherwise can affect aluminum hydroxide particles agglomeration and growth in kind of minute process, namely affect the granularity of rate of decomposition and aluminum hydroxide particles.And in production reality due to the specific chemistry of seed precipitation solution and physical properties, planting the filtrate of dividing slip to obtain through vacuum filter is that seed precipitation solution can produce a large amount of foams, foam not only makes filtrate receiver the groove phenomenon often occur emitting, have a strong impact on and produce and operating environment, and the volume of foam makes more greatly the type selecting of filtrate pump to consider according to the several times of actual flow.
Therefore how to remove the foam of seed filter progress filtrate in alumina producing, be the difficult problem of puzzlement alumina producing enterprise always.Once used mechanical defoaming in production, added the defoamer froth breaking and increased the mode such as kind of filtrate receiver and addressed this problem, mechanical defoaming need to increase Despumation device in the seed precipitation solution groove, and liquid seal trough is arranged in filtrate receiver, so difficult in Machine Design, design and unreasonablely can produce more foam on the contrary; Defoamer is pharmaceutical chemicals, and after adding, it enters in the alumina producing system, is unfavorable for normal production after long-term accumulation; Can only suitably improve operating mode and increase the seed precipitation solution groove, can not fundamentally solve bubble problem, and filtrate receiver adds and need after too high filter place flooring to raise, cause this operation initial cost greatly to increase.
Summary of the invention
The present invention is the method and system that a kind of seed precipitation solution froth breaking is provided in order to solve the problems of the technologies described above, and purpose is in time to eliminate the foaming that seed precipitation solution produces, thereby utilizes the seed precipitation solution spray seed precipitation solution foam that refluxes to play the effect of froth breaking.
In order to solve the problems of the technologies described above, the present invention is achieved in that the method for seed precipitation solution froth breaking, the seed precipitation solution pipeline that will be sent to continuously the seminal fluid cooling process is established take-off pipe makes a part of seed precipitation solution return to filtrate receiver, and the seed precipitation solution that returns is sprayed onto filtrate receiver through the spray equipment of take-off pipe end.
Described spray equipment top hole pressure is 0.5～0.8MPa.
Described spray equipment exceeds filtrate receiver groove top 1.0～1.5m.
The take-off pipe of described spray equipment front portion is provided with reducer union.
The system of seed precipitation solution froth breaking, it is characterized in that vacuum filter is connected by liquid bath by pipeline and vacuum, vacuum is connected with vacuum pump by the liquid bath top, vacuum is connected with filtrate receiver by the bottom of liquid bath, the bottom of filtrate receiver is connected with filtrate pump by pipeline, over top at filtrate receiver is provided with spray equipment, and spray equipment is located at the end of take-off pipe, and take-off pipe is that filtrate pump is sent to the branch on seminal fluid cooling process seed precipitation solution pipeline.
Advantage of the present invention and effect are: above technical process is continuous entirely, does not substantially need to operate manually; And can regulate the top hole pressure of spray equipment, the flow of take-off pipe according to different foaming situations, applied widely to the seed precipitation solution under different technology conditions, the investment of required increase is only for increasing a small amount of tubing and shower nozzle; Though this invention has increased internal circulating load, because the froth breaking effect is obvious, improved production and the operating environment of enterprise, reduced the flow of filtrate pump, played the effect of energy efficiency.
Description of drawings
Fig. 1 is process flow sheet of the present invention.
In figure: 1, vacuum filter; 2, vacuum is subjected to liquid bath; 3, filtrate receiver; 4, vacuum pump; 5, filtrate pump; 6, sloper; 7, spray equipment; 8, aluminum hydroxide slime; 9, seed precipitation solution; 10, filtrate.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing.
The method of seed precipitation solution froth breaking as shown in Figure 1, seed precipitation solution 9 pipelines that will be sent to continuously the seminal fluid cooling process are established take-off pipe makes a part of seed precipitation solution 9 return to filtrate receiver 3, and the seed precipitation solution 9 that returns is sprayed onto filtrate receiver 3 through the spray equipment 7 of take-off pipe end.
Described spray equipment 7 top hole pressures are 0.5～0.8MPa, and the too small defoaming effect of pressure is bad, and pressure is crossed conference and produced " secondary foam ".
Described spray equipment 7 exceeds filtrate receiver 3 groove top 1.0～1.5m, to enlarge projected area, if the filtrate receiver area is larger, can adopt 2 even multi-point injection.
The take-off pipe of described spray equipment 7 front portions is provided with reducer union 6, to improve jet velocity.
The system of seed precipitation solution froth breaking, vacuum filter 1 is connected by liquid bath 2 by pipeline and vacuum, vacuum is connected with vacuum pump 4 by liquid bath 2 tops, vacuum is connected with filtrate receiver 3 by the bottom of liquid bath 2, the bottom of filtrate receiver 3 is connected with filtrate pump 5 by pipeline, over top at filtrate receiver 3 is provided with spray equipment 7, and spray equipment 7 is located at the end of take-off pipe, and take-off pipe is that filtrate pump 5 is sent to the branch on seminal fluid cooling process seed precipitation solution pipeline.
The take-off pipe of described spray equipment 7 front portions is provided with reducer union 6.
Described spray equipment 7 exceeds filtrate receiver groove top 1.0～1.5m.
continuously aluminum hydroxide slime 8 is delivered to the charging mouth of pipe of vacuum filter 1, vacuum filter 1 is subjected to liquid bath 2 with vacuum, vacuum pump 4 has formed closed system, aluminum hydroxide slime 8 is under the effect of vacuum pump 4, filtrate is that seed precipitation solution enters vacuum and is subjected to liquid bath 2, seed precipitation solution flows automatically to filtrate receiver 3 under action of gravitation, the effect that filtrate receiver 3 inside have liquid seal device can play fluid-tight makes seed precipitation solution can suck-back not turn back to vacuum and is subjected in liquid bath 2 and vacuum pump 4, in filtrate receiver 3, the filtrate 10 of bottom is sent to the seminal fluid cooling process through filtrate pump 5, the seldom seed precipitation solution 9 that is sent to the seminal fluid cooling process returns to filtrate receiver 3, seed precipitation solution 9 spray foams of backflow with pressure play the effect of froth breaking.
Claims (7)
1. the method for seed precipitation solution froth breaking, the seed precipitation solution pipeline that it is characterized in that being sent to continuously the seminal fluid cooling process is established take-off pipe makes a part of seed precipitation solution return to filtrate receiver, and the seed precipitation solution that returns is sprayed onto filtrate receiver through the spray equipment of take-off pipe end.
2. the method for seed precipitation solution froth breaking according to claim 1, is characterized in that described spray equipment top hole pressure is 0.5～0.8MPa.
3. the method for seed precipitation solution froth breaking according to claim 2, is characterized in that described spray equipment exceeds filtrate receiver groove top 1.0～1.5m.
4. the method for seed precipitation solution froth breaking according to claim 2 is characterized in that the take-off pipe of described spray equipment front portion is provided with reducer union.
5. the system of seed precipitation solution froth breaking according to claim 1, it is characterized in that vacuum filter is connected by liquid bath by pipeline and vacuum, vacuum is connected with vacuum pump by the liquid bath top, vacuum is connected with filtrate receiver by the bottom of liquid bath, the bottom of filtrate receiver is connected with filtrate pump by pipeline, over top at filtrate receiver is provided with spray equipment, and spray equipment is located at the end of take-off pipe, and take-off pipe is that filtrate pump is sent to the branch on seminal fluid cooling process seed precipitation solution pipeline.
6. the system of seed precipitation solution froth breaking according to claim 5 is characterized in that the take-off pipe of described spray equipment front portion is provided with reducer union.
7. the system of seed precipitation solution froth breaking according to claim 5, is characterized in that described spray equipment exceeds filtrate receiver groove top 1.0～1.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110339075.9A CN103086407B (en) | 2011-11-01 | 2011-11-01 | Seed precipitation mother liquor defoaming method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110339075.9A CN103086407B (en) | 2011-11-01 | 2011-11-01 | Seed precipitation mother liquor defoaming method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103086407A true CN103086407A (en) | 2013-05-08 |
| CN103086407B CN103086407B (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110339075.9A Expired - Fee Related CN103086407B (en) | 2011-11-01 | 2011-11-01 | Seed precipitation mother liquor defoaming method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106542552A (en) * | 2015-09-21 | 2017-03-29 | 沈阳铝镁设计研究院有限公司 | A kind of alumina producing decomposition nut liquid debubbling method |
| CN108444562A (en) * | 2018-06-21 | 2018-08-24 | 水利部南京水利水文自动化研究所 | A kind of liquid-volume measurement apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4511542A (en) * | 1984-05-24 | 1985-04-16 | Kaiser Aluminum & Chemical Corporation | Bayer process production of alumina hydrate |
| CN201136793Y (en) * | 2007-11-29 | 2008-10-22 | 唐传辉 | Defoaming box |
-
2011
- 2011-11-01 CN CN201110339075.9A patent/CN103086407B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4511542A (en) * | 1984-05-24 | 1985-04-16 | Kaiser Aluminum & Chemical Corporation | Bayer process production of alumina hydrate |
| CN201136793Y (en) * | 2007-11-29 | 2008-10-22 | 唐传辉 | Defoaming box |
Non-Patent Citations (1)
| Title |
|---|
| 王国荣: "几种简易喷嘴简介", 《纸和造纸》, no. 3, 31 July 1992 (1992-07-31), pages 40 - 41 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106542552A (en) * | 2015-09-21 | 2017-03-29 | 沈阳铝镁设计研究院有限公司 | A kind of alumina producing decomposition nut liquid debubbling method |
| CN106542552B (en) * | 2015-09-21 | 2018-05-22 | 沈阳铝镁设计研究院有限公司 | A kind of alumina producing decomposition nut liquid debubbling method |
| CN108444562A (en) * | 2018-06-21 | 2018-08-24 | 水利部南京水利水文自动化研究所 | A kind of liquid-volume measurement apparatus |
| CN108444562B (en) * | 2018-06-21 | 2023-12-05 | 水利部南京水利水文自动化研究所 | Liquid volume metering device |
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| Publication number | Publication date |
|---|---|
| CN103086407B (en) | 2015-07-22 |
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Effective date of registration: 20180307 Address after: 110101 No. 176-1 Dingxiang street, Sujiatun District, Liaoning, Shenyang Patentee after: SHENYANG BOYU TECHNOLOGY Co.,Ltd. Address before: 110001 Heping Street, Heping District, Liaoning, Shenyang, No. 184 Patentee before: SHENYANG ALUMINIUM AND MAGNESIUM ENGINEERING AND RESEARCH INSTITUTE COMPANY LIMITED |
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Granted publication date: 20150722 Termination date: 20211101 |
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