CN103349865B - Tilting-pan filter filtration cloth regeneration method - Google Patents
Tilting-pan filter filtration cloth regeneration method Download PDFInfo
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- CN103349865B CN103349865B CN201310184549.6A CN201310184549A CN103349865B CN 103349865 B CN103349865 B CN 103349865B CN 201310184549 A CN201310184549 A CN 201310184549A CN 103349865 B CN103349865 B CN 103349865B
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- filter cloth
- strong base
- regeneration
- tilting
- base solution
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Abstract
The invention discloses a tilting-pan filter filtration cloth regeneration method, wherein the tilting-pan filter is provided for separation of silicon calcium reside produced during an alumina extraction process through a fly ash alkali method. The method comprises: disassembling the filtration cloth from the tilting-pan filter, and immersing the filtration cloth into a strong alkali solution to carry out a regeneration treatment, wherein a regeneration treatment temperature is 90-100 DEG C. According to the tilting-pan filter filtration cloth regeneration method, the filtration cloth is disassembled from the tilting-pan filter, and then the strong alkali solution is adopted to immerse the filtration cloth so as to increase regeneration efficiency of the filtration cloth, and substantially improve operation efficiency and production efficiency of the tilting-pan filter.
Description
Technical field
The present invention relates to revolving-leaf type filter technical field, particularly a kind of renovation process of revolving-leaf type filter filter cloth.
Background technology
Some large-scale coalfields of Inner Mongolia of China are due to special geologic setting, the aluminous fly-ash aluminium oxide average content that its fire coal produces is up to 48.5%, suitable with alumina content in medium grade alumyte, be a kind of very valuable alumina producing raw material.
At present, aluminous fly-ash produce aluminium oxide comparatively rationally and maturation method be exactly pre-desiliconizing soda lime sintering process.To flyash sintered clinker stripping slurries solid-liquor separation process, have employed revolving-leaf type filter and substitute traditional subsider, carry out solid-liquid quick separating, to reduce the loss amount of secondary response, but filter medium life shorter-filter cloth very easily scabs, cause and calcium silicate slag slurries separating effect is deteriorated, serious Ash Conveying alkalinity extraction alumina producing efficiency, and increase production cost.
In view of above reason, the filter cloth that must scab to revolving-leaf type filter carries out regeneration process.Existing relevant filter cloth regeneration technology is the regeneration in filter cloth use procedure, filter cloth is not carried out dismantling and installing from use equipment, not only regeneration efficiency is low, and regenerated filter fabric regeneration alkali lye used and washing lotion suitably do not process, all can to environment.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of renovation process of revolving-leaf type filter filter cloth, solves the problem that the regeneration efficiency of existing revolving-leaf type filter filter cloth regeneration method existence is low.
For solving the problems of the technologies described above, the invention provides a kind of renovation process of revolving-leaf type filter filter cloth, described revolving-leaf type filter is used for the separation of the calcium silicate slag generated in flyash alkalinity extraction alumina process, comprises:
Described filter cloth is disassembled from described revolving-leaf type filter, and is immersed in strong base solution;
Described renovation process comprises heating strong base solution.
Further: described heating strong base solution is that strong base solution is heated to 90 ~ 100 DEG C.
Further: described strong base solution comprises NaOH solution, KOH solution or Ba (OH)
2solution.
Further: the mass fraction of described NaOH solution is 20-30%.
Further: described regeneration process comprises stirring strong base solution.
Further, the addition of described strong base solution is that every square meter filter cloth adds 0.05-0.08m
3strong base solution.
Further, the time of described regenerative response is 5.0-7.0h;
Further, the water of filter cloth water temperature 60-80 DEG C after regeneration process is washed.
The main phase scabbed for the revolving-leaf type filter filter cloth of flyash alkaline process production aluminium oxide consists of CaCO
3, Na
96al
96si
96o
384, Al (OH)
3deng; Adopt regeneration process filter cloth in strong base solution, OH in alkaline solution
-attack cause zeolite facies Na
96al
96si
96o
384blemish place is formed " hole " not of uniform size, and the hole along with the increase zeolite surface of time increases gradually and becomes large, and cause zeolite matrix to be caved in and come off, calcium carbonate also enters in alkali lye mutually thereupon; In processing procedure, stir the carrying out that alkali lye is conducive to accelerating this process, finally make filter cloth be regenerated preferably.
Compared with the prior art, the invention has the advantages that:
(1) the present invention extracts the existing production procedure of aluminium oxide to coal ash alkali lime sinter process and does not produce any impact, greatly improves operational efficiency and the production efficiency of revolving-leaf type filter.
(2) Matter Transfer uses, and the NaOH solution after filter cloth regeneration and cleaning solution are recycled as flyash pre-desiliconizing alkali lye, this will effectively improve the utilization rate of resource, and regenerative process does not produce any waste water and waste residue.
(3) process is simple, is convenient to practical operation.
In a word, the renovation process of revolving-leaf type filter filter cloth provided by the invention, improves the regeneration efficiency of filter cloth, also greatly improves operational efficiency and the production efficiency of revolving-leaf type filter.
Accompanying drawing explanation
The schematic flow sheet of the renovation process of the revolving-leaf type filter filter cloth that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
See Fig. 1, the renovation process of a kind of revolving-leaf type filter filter cloth provided by the invention, comprises following steps:
1) filter cloth that scabbed by revolving-leaf type filter puts into the immersion of regeneration strong base solution after revolving-leaf type filter disassembles, and ensure that filter cloth is immersed in all the time in strong base solution in regenerative process, wherein strong base solution can be NaOH solution;
2), in the process of regenerative response, regeneration alkali lye is made to keep certain circulation and flowing by stirring;
3) control the alkali concn of regeneration alkali lye for mass fraction 20-30%, temperature 90 ~ 100 DEG C, soak time is 5-7h, and 0.05-0.08m pressed by every square meter filter cloth
3naOH solution adds;
4), after completing the regeneration to filter cloth, filter cloth is pulled out and rinses with 60-80 DEG C of hot water of water temperature;
5) alkali lye after regeneration and filter cloth washing lotion return pre-desiliconizing flow process and carry out pre-desiliconizing to flyash.
Be below the specific embodiment of the renovation process of revolving-leaf type filter filter cloth provided by the invention, the production of getting 6 × 6cm-8 × 8cm in experimentation turns over the filter cloth that scabs:
Embodiment 1
Extract in aluminum oxide production process in coal ash alkali lime sinter process, the filter cloth that scabs of revolving-leaf type filter is immersed in 20%NaOH solution, and stir regeneration 5h at 90 DEG C after, filter cloth taking-up is fully washed with 60 DEG C of hot water, with new filter cloth, solid-liquor separation is carried out to identical calcium silicate slag slurries with the filter cloth after regeneration, the vacuum that solid-liquor separation reaches is 0.08Mpa, filter cloth after the regeneration time used is 40 seconds, the new filter cloth time used is 39 seconds, the new filter cloth of the average breaking strength of filter cloth monofilament is 100N/mm, is 99N/mm after regeneration.
Embodiment 2
Extract in aluminum oxide production process in coal ash alkali lime sinter process, the filter cloth that scabs of revolving-leaf type filter is immersed in 30%NaOH solution, and stir regeneration 6h at 95 DEG C after, filter cloth taking-up is fully washed with 80 DEG C of hot water, with new filter cloth, solid-liquor separation is carried out to identical calcium silicate slag slurries with the filter cloth after regeneration, the vacuum that solid-liquor separation reaches is 0.08Mpa, filter cloth after the regeneration time used is 34 seconds, and the new filter cloth time used is 34 seconds.
Embodiment 3 to embodiment 7 is as following table:
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (2)
1. the renovation process of a revolving-leaf type filter filter cloth, described revolving-leaf type filter is used for the separation of the calcium silicate slag generated in flyash alkalinity extraction alumina process, it is characterized in that, comprise: described filter cloth is disassembled from described revolving-leaf type filter, and be immersed in strong base solution; Described renovation process comprises the described strong base solution of heating;
Described heating strong base solution is that strong base solution is heated to 90 ~ 100 DEG C;
Described regeneration process comprises stirring strong base solution;
The addition of described strong base solution is that every square meter filter cloth adds 0.05-0.08m
3strong base solution; The time of described regenerative response is 5.0-7.0h;
The water of filter cloth water temperature 60-80 DEG C after regeneration process is washed;
Described strong base solution comprises NaOH solution, KOH solution or Ba (OH)
2solution.
2. renovation process as claimed in claim 1, is characterized in that: the mass fraction of described NaOH solution is 20-30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310184549.6A CN103349865B (en) | 2013-05-17 | 2013-05-17 | Tilting-pan filter filtration cloth regeneration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310184549.6A CN103349865B (en) | 2013-05-17 | 2013-05-17 | Tilting-pan filter filtration cloth regeneration method |
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| Publication Number | Publication Date |
|---|---|
| CN103349865A CN103349865A (en) | 2013-10-16 |
| CN103349865B true CN103349865B (en) | 2015-05-20 |
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| CN201310184549.6A Active CN103349865B (en) | 2013-05-17 | 2013-05-17 | Tilting-pan filter filtration cloth regeneration method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103755060B (en) * | 2013-12-27 | 2015-07-22 | 中国神华能源股份有限公司 | Dissolving-out slurry separation washing method used in coal ash acid-process aluminium oxide production process |
| CN104324550A (en) * | 2014-10-10 | 2015-02-04 | 洛阳中超非金属材料有限公司 | Vertical leaf filter filtration cloth regeneration process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102746954A (en) * | 2012-07-23 | 2012-10-24 | 瓮福（集团）有限责任公司 | Cleaning agent for cleaning filter cloth for producing crystalline monoammonium phosphate by raffinate |
| CN102897809A (en) * | 2012-11-06 | 2013-01-30 | 大唐国际发电股份有限公司 | Method and equipment for separating and washing fly ash calcium silicate slag |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5544311A (en) * | 1978-09-25 | 1980-03-28 | Japan Organo Co Ltd | Washing method of tufted filter cloth and washing device |
-
2013
- 2013-05-17 CN CN201310184549.6A patent/CN103349865B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102746954A (en) * | 2012-07-23 | 2012-10-24 | 瓮福（集团）有限责任公司 | Cleaning agent for cleaning filter cloth for producing crystalline monoammonium phosphate by raffinate |
| CN102897809A (en) * | 2012-11-06 | 2013-01-30 | 大唐国际发电股份有限公司 | Method and equipment for separating and washing fly ash calcium silicate slag |
Non-Patent Citations (1)
| Title |
|---|
| "脱硅粉煤灰浆液过滤介质选择与滤饼洗涤研究";闫学良等;《过滤与分离》;20111231;第21卷(第4期);第1-3页 * |
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| CN103349865A (en) | 2013-10-16 |
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