CN102399373B - Method for recovering polyvinyl chloride (PVC) particles from PVC centrifuged waste water - Google Patents
Method for recovering polyvinyl chloride (PVC) particles from PVC centrifuged waste water Download PDFInfo
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- CN102399373B CN102399373B CN2010102828545A CN201010282854A CN102399373B CN 102399373 B CN102399373 B CN 102399373B CN 2010102828545 A CN2010102828545 A CN 2010102828545A CN 201010282854 A CN201010282854 A CN 201010282854A CN 102399373 B CN102399373 B CN 102399373B
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- waste water
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- polyvinyl chloride
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention discloses a method for recovering polyvinyl chloride (PVC) particles from PVC centrifuged waste water. The method adopts a centrifuge, a washing tower, an inclined plate fast depositing tank, a pneumatic continuous sand filter, a release tank and a biochemical treatment device, wherein the centrifuge, the washing tower, the inclined plate fast depositing tank, the pneumatic continuous sand filter, the release tank and the biochemical treatment device are connected orderly. In PVC production, most of waste water produced by the centrifuge directly enters into the inclined plate fast depositing tank and the pneumatic continuous sand filter. A small amount of the waste water is fed back to the washing tower to replace primary water to be utilized as washing water. The washing water is utilized for capturing PVC particles in exhaust gas from an induced draught fan outlet. The washed waste water enters into the inclined plate fast depositing tank for precipitation and then enters into the pneumatic continuous sand filter for filtration. The filtered waste water is collected by the release tank and then is fed into the biochemical treatment device for treatment by a pump. The method obviously improves a recovery rate of PVC particles in waste water, greatly reduces suspension content of waste water, and produces good economic benefits, social benefits and ecological benefits.
Description
Technical field:
The present invention relates to the method that a kind of PVC particle reclaims, the method that particularly reclaims for PVC particle in the polyvinyl chloride centrifugation waste water.
Background technology:
In Production of PVC technique, the liquid phase polymerization reaction take place generates polyvinyl chloride resin in the polymeric kettle, and the polyvinyl chloride resin of production carries out solid-liquid separation through whizzer.The solid phase filter cake is moisture about 22%, goes follow-up drying, and dry end has the cyclone gas-solid tripping device, and solid phase is gone the finished product packing operation, and gas phase enters in the atmosphere through the induced draft fan outlet, has wherein carried a small amount of PVC dust secretly; Whizzer filtrate suspension content (SS) is less than 200ppm.
In the Production of PVC enterprise at home, the waste water that whizzer and washing tower produce all is directly to enter settling bowl to precipitate, enter biochemical treatment apparatus to remove microorganism and suspended substance wherein through the waste water after the precipitation, thereby reach the reuse purpose, the PVC particle that precipitates in the settling bowl all will organize manpower repeatedly to clear up every year, still higher through suspension content in the waste water after the precipitation, increased the burden of follow-up biochemical treatment process, and residual PVC particle hard degradation, be deposited in the filling surface of the hydrolytic tank of biochemical device, affect the effect of biochemical treatment.
In addition, the settling bowl floor space is larger, and it is lower to reclaim the PVC particulate efficiency, becomes an outstanding difficult problem of restriction Sustainable Development of Enterprises.
Summary of the invention:
The invention solves the lower difficult problem of PVC particle recovery in the prior art, and then provide a kind of and can carry out efficient recovery to PVC particle in the polyvinyl chloride centrifugation waste water, and greatly alleviate the method for wastewater biochemical treatment process burden.
The technical solution used in the present invention is: the method that the PVC particle reclaims in a kind of polyvinyl chloride centrifugation waste water of the present invention; Comprise the whizzer, induced draft fan outlet washing tower, the fast deep gouge of swash plate, pneumatic continuous sand filtration device, the pond of releasing, the biochemical treatment apparatus that link to each other successively; In the Production of PVC operation, most of waste water that whizzer produces directly enters the fast deep gouge of swash plate and pneumatic continuous sand filtration device, small part is returned washing tower and is replaced a water as bath water, be used for the PVC particle of induced draft fan outlet waste gas is caught, waste water after the washing enters the fast deep gouge of swash plate and pneumatic continuous sand filtration device equally, waste water precipitates through the fast deep gouge of swash plate first, then filter through pneumatic continuous sand filtration device, then wastewater collection after the filtration is processed to biochemical treatment apparatus with pump delivery to the pond of releasing.
The method that the PVC particle reclaims in described a kind of polyvinyl chloride centrifugation waste water, the PVC particle recovery improves greatly in the polyvinyl chloride centrifugation waste water after treatment, reaches more than 95%.
The method that the PVC particle reclaims in described a kind of polyvinyl chloride centrifugation waste water, suspension content (SS) can be down to below the 10ppm from 200ppm in the polyvinyl chloride centrifugation waste water after treatment.
The present invention processes by using first the advanced fast deep gouge of swash plate and pneumatic continuous sand filtration device to carry out centrifuge waste water in the chlor-alkali industry polymerization process; not only so that the PVC particle recovery obviously improve; and make that suspension content reduces greatly in the waste water; alleviate the burden of the follow-up biochemical treatment process of waste water, produced good economic benefit, social benefit and ecological benefits.The present invention can be widely used in the PVC particle and reclaim in the technique, particularly in the polyvinyl chloride centrifugation waste water in the PVC particle recovery method.
Description of drawings:
Fig. 1 is the embodiments of the invention process flow sheet;
Among Fig. 1: 1 for whizzer, 2 for induced draft fan outlet washing tower, 3 for the fast deep gouge of ramp type, 4 for pneumatic continuous sand filtration device, 5 for the pond of releasing, 6 be biochemical treatment apparatus;
Embodiment:
With reference to accompanying drawing 1, present embodiment comprises whizzer 1, induced draft fan outlet washing tower 2, the fast deep gouge 3 of ramp type, pneumatic continuous sand filtration device 4, the pond 5 of releasing, the biochemical treatment apparatus 6 that links to each other successively; In the Production of PVC operation, most of waste water that whizzer produces directly enters the fast deep gouge of swash plate and pneumatic continuous sand filtration device, small part is returned washing tower and is replaced a water as bath water, be used for the PVC particle of induced draft fan outlet waste gas is caught, waste water after the washing enters the fast deep gouge of swash plate and pneumatic continuous sand filtration device equally, waste water precipitates through the fast deep gouge of swash plate first, then filter through pneumatic continuous sand filtration device, then wastewater collection after the filtration is processed to biochemical treatment apparatus with pump delivery to the pond of releasing.
Another embodiment difference is that going out water suspension content (SS) can be down to below the 5ppm when water inlet suspension content (SS) during less than 100ppm.
Another embodiment difference is that equipment does not need to shut down backwash in operational process, but continuous filtration, continuously backwash.
Another embodiment difference is that equipment uses advanced DCS Controlling System, can realize remote control.
Claims (4)
1. the method that the PVC particle reclaims in the polyvinyl chloride centrifugation waste water; Comprise the whizzer, induced draft fan outlet washing tower, the fast deep gouge of swash plate, pneumatic continuous sand filtration device, the pond of releasing, the biochemical treatment apparatus that link to each other successively; In the Production of PVC operation, most of waste water that whizzer produces directly enters the fast deep gouge of swash plate and pneumatic continuous sand filtration device, small part is returned washing tower and is replaced a water as bath water, be used for the PVC particle of induced draft fan outlet waste gas is caught, waste water after the washing enters the fast deep gouge of swash plate and pneumatic continuous sand filtration device equally, waste water precipitates through the fast deep gouge of swash plate first, then filter through pneumatic continuous sand filtration device, then wastewater collection after the filtration is processed to biochemical treatment apparatus with pump delivery to the pond of releasing.
2. the method that the PVC particle reclaims in the polyvinyl chloride centrifugation waste water according to claim 1 is characterized in that: use the fast deep gouge of swash plate and pneumatic continuous sand filtration device to carry out centrifuge waste water in the chlor-alkali industry polymerization process and process.
3. the method that the PVC particle reclaims in the polyvinyl chloride centrifugation waste water according to claim 2, it is characterized in that: equipment does not need to shut down backwash in carrying out wastewater treatment process, but continuous filtration, continuously backwash.
4. the method that the PVC particle reclaims according to claim 2 or in the 3 described polyvinyl chloride centrifugation waste water is characterized in that: equipment adopts the DCS Controlling System, can realize remote control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102828545A CN102399373B (en) | 2010-09-16 | 2010-09-16 | Method for recovering polyvinyl chloride (PVC) particles from PVC centrifuged waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102828545A CN102399373B (en) | 2010-09-16 | 2010-09-16 | Method for recovering polyvinyl chloride (PVC) particles from PVC centrifuged waste water |
Publications (2)
| Publication Number | Publication Date |
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| CN102399373A CN102399373A (en) | 2012-04-04 |
| CN102399373B true CN102399373B (en) | 2013-01-09 |
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| CN2010102828545A Active CN102399373B (en) | 2010-09-16 | 2010-09-16 | Method for recovering polyvinyl chloride (PVC) particles from PVC centrifuged waste water |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343132A (en) * | 2008-08-28 | 2009-01-14 | 杭州水处理技术研究开发中心有限公司 | Treatment method for wastewater of polyvinyl chloride (PVC) anticentripetal mother solution |
| CN101462815A (en) * | 2009-01-16 | 2009-06-24 | 天津威德泰科石化科技发展有限公司 | Method for treating centrifuge mother liquor wastewater from polychloroethylene production |
| CN101525198A (en) * | 2009-04-03 | 2009-09-09 | 寿光新龙电化集团聚氯乙烯有限公司 | Method for treating and recovering polyvinyl chloride mother liquid waste water |
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2010
- 2010-09-16 CN CN2010102828545A patent/CN102399373B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343132A (en) * | 2008-08-28 | 2009-01-14 | 杭州水处理技术研究开发中心有限公司 | Treatment method for wastewater of polyvinyl chloride (PVC) anticentripetal mother solution |
| CN101462815A (en) * | 2009-01-16 | 2009-06-24 | 天津威德泰科石化科技发展有限公司 | Method for treating centrifuge mother liquor wastewater from polychloroethylene production |
| CN101525198A (en) * | 2009-04-03 | 2009-09-09 | 寿光新龙电化集团聚氯乙烯有限公司 | Method for treating and recovering polyvinyl chloride mother liquid waste water |
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| CN102399373A (en) | 2012-04-04 |
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