CN102515287A - Treatment method for recycling of polrvinyl chloride centrifugal mother liquor wastewater and filter - Google Patents
Treatment method for recycling of polrvinyl chloride centrifugal mother liquor wastewater and filter Download PDFInfo
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- CN102515287A CN102515287A CN2011103961083A CN201110396108A CN102515287A CN 102515287 A CN102515287 A CN 102515287A CN 2011103961083 A CN2011103961083 A CN 2011103961083A CN 201110396108 A CN201110396108 A CN 201110396108A CN 102515287 A CN102515287 A CN 102515287A
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
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Abstract
A treatment method for recycling of poly vinyl chloride (PVC) centrifugal mother liquor wastewater includes the following steps: A filtering the PVC centrifugal mother liquor wastewater, separating particulate matter from the wastewater, and collecting filtered liquor; and B conveying the filtered liquor to a polymerizing kettle for polymerization production. The invention further discloses a filter used in the treatment method. The method does not need additional substances such as coagulants, flocculants and the like. PVC centrifugal mother liquor can be returned to the kettle for use to the maximum degree, thereby playing the role of energy saving and emission reduction. The treatment method is suitable for PVC centrifugal mother liquor of various formulas.
Description
Technical field
The present invention relates to the treatment process of a kind of suspension type polyvinyl-chloride centrifugal mother liquor waste water reuse.
The invention still further relates to the strainer that is used to realize above-mentioned treatment process.
Background technology
PVC (SE) can produce a large amount of centrifugal mother liquor waste waters in polymerization process, one ton of PVC of average every production can produce 3-4 cubic meter waste water, and the temperature of this waste water is generally at 60-70 ℃.Dispersion agent, initiator, terminator and the skimmer etc. that add when mainly containing polymerization in the PVC centrifugal mother liquor waste water also have some VCM (vinylchlorid) monomer and PVC PM for particulate matter in addition.The water inlet aborning of this waste water is a deionized water, does not also increase the link of hardness in the technological process, and the water hardness of water outlet and saltiness are all lower.The inferior grade make up water is got back to after with its simple process by present most of producer, and benefit is also also not obvious when having wasted a large amount of heats, auxiliary agent.Along with the PVC intensified competition, environmental protection pressure strengthens, and this waste water is handled the method urgent need of utilizing with high-level efficiency cheaply and improved.
Summary of the invention
The object of the present invention is to provide the treatment process of a kind of PVC centrifugal mother liquor waste water reuse.
Another purpose of the present invention is to provide a kind of strainer that is used to realize above-mentioned treatment process.
For realizing above-mentioned purpose, the treatment process of PVC centrifugal mother liquor waste water provided by the invention reuse may further comprise the steps:
A) the PVC centrifugal mother liquor waste water filters, and PM for particulate matter is separated with waste water, and collect the clear liquid after filtering;
B) clear liquid after will filtering is transported to and carries out polymerization production in the polymeric kettle.
Described treatment process wherein, is filtered into end-filtration or cross flow filter in the steps A, the producing water ratio scope is 40～90%.
Described treatment process, wherein, clear liquid is transported to and carries out polymerization production after polymeric kettle replenishes the de-salted water that weight ratio concentration is 20-60% among the step B.
The strainer that is used to realize above-mentioned treatment process provided by the invention, its structure is:
One shell is provided with a water-in, and the top of this shell is provided with a concentrated water drainage mouth of a river, and the bottom is provided with one and produces the water water outlet, and the inside of shell is provided with micropore filter element.
Described strainer, wherein, to be stupalith and macromolecule polymer material form in the ratio sintering of mass ratio 1: 7.5-8.5 micropore filter element.
Described is empty filter core, and wherein to be SE and Vilaterm form by the mixed of mass ratio 1: 3.5-4.5 high molecular polymer.
Described strainer, wherein, the aperture of micropore filter element is 0.22-0.45 μ m.
Described strainer, wherein, the filter backwash mode is that air purge, washing and air water mixing are washed; The backwash cycle is 30～120min.
Described strainer, wherein, the micropore filter element regeneration of strainer is matting, ultrasonic cleaning or sintering.
Described strainer, wherein, strainer is the closed stainless steel.
The effect that the present invention has is:
1) the present invention can make the PVC centrifugal mother liquor waste water get back to be used in the polymeric kettle PVC polymerization water, when practicing thrift the water source, has reclaimed resources such as great amount of heat, auxiliary agent.
2) in the PVC centrifuge mother liquor treatment process of the present invention, the PVC centrifuge mother liquor need not temperature-fall periods such as cooling, heat exchange, has simple to operate, high efficiency, is applicable to the industrial production requirement characteristics.
3) the present invention has that technical process is simple, energy consumption is low, the reagent consumption amount is low, characteristics such as PVC polymerization water are satisfied in water outlet, and the present invention simultaneously is very suitable to the PVC centrifugal mother liquor waste water of various prescriptions, has good economic benefits and social benefit.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is a structure of filter synoptic diagram of the present invention.
Embodiment
PVC centrifugal mother liquor wastewater treatment method provided by the invention may further comprise the steps:
A) the PVC centrifugal mother liquor waste water gets into strainer, realizes that PM for particulate matter separates with waste water, and collects the clear liquid after filtering.
B) clear liquid after will filtering is transported in the polymeric kettle, carries out polymerization production.
In the treatment process of above-mentioned PVC centrifuge mother liquor, the de-salted water that can replenish weight concentration among the step B and be 20-60% carries out polyreaction again.
In the treatment process of above-mentioned PVC centrifuge mother liquor, filtering mode can be end-filtration or cross flow filter, and the producing water ratio scope is 40～90%.
The strainer that PVC centrifuge mother liquor treatment process of the present invention adopts all adopts the closed stainless steel, not extra other materials of introducing of treating processes.Strainer of the present invention has a shell 10, and the bottom of shell is provided with a water-in 11, and the top of this shell is provided with a concentrated water drainage mouth of a river 12, and the bottom is provided with one and produces water water outlet 13, and the inside of shell is provided with micropore filter element 14.Micropore filter element 14 forms for stupalith and the high molecular polymer ratio sintering in mass ratio 1: 7.5-8.5, and high molecular polymer wherein is to be formed by SE and the Vilaterm mixed by mass ratio 1: 3.5-4.5.The aperture of micropore is 0.22-0.45 μ m.The filter backwash mode can be that air purge, washing and air water mixing are washed; The backwash cycle is 30-120min; The regeneration of micropore filter element can be matting, ultrasonic cleaning and sintering.
Do further to describe below in conjunction with accompanying drawing.
Technical scheme of the present invention may further comprise the steps:
See also shown in Figure 1ly, the PVC centrifuge mother liquor of collection gets into strainer 1 through lift pump to carry out PM for particulate matter and separates (strainer adopts the cross flow filter mode) with clear liquid, and dope gets into dense pond 2, and clear liquid flows into clear water jar 3; Clear liquid in the clear water jar 3 is sent into polymeric kettle 4 through lift pump, and through replenishing an amount of de-salted water, the adjustment polymerization formula carries out polymerization production and carries out polymerization production.When the filtration resistance of strainer reaches 0.3Mpa, carry out back flushing, backwashing wastewater gets into dense pond 2.Micropore filter element can be tackled all suspended particulates in the PVC mother liquor, and strainer integral unit adopts stainless steel, and the relevant grade with polymerization plant of grade is identical, can not introduce other materials.
Collect the PVC centrifuge mother liquor of certain PVC factory polymerization plant, adopt the stainless steel lift pump that it is pumped into strainer, adopt the mode of cross flow filter to filter, producing water ratio is 50%.SS is 47.1 before filtering, and produces water stillness of night SS and does not detect; It is subsequent use to produce water entering clear water jar, and concentrated water drainage is gone into dense pond.Carry out air water mixing backwash when filtering when pressure reaches 0.3Mpa, the gas backwash pressure is 0.3Mpa, and water backwash flow is 13L/m
2S, the backwash time is 2min.Backwash waste is gone into dense pond with concentrated water drainage.Clear liquid is sent into polymeric kettle through lift pump in the clear water jar, and the de-salted water through additional 50% carries out polymerization production.
Claims (10)
1. the treatment process of PVC centrifugal mother liquor waste water reuse may further comprise the steps:
A) the PVC centrifugal mother liquor waste water filters, and PM for particulate matter is separated with waste water, and collect the clear liquid after filtering;
B) clear liquid after will filtering is transported to and carries out polymerization production in the polymeric kettle.
2. treatment process according to claim 1 wherein, is filtered into end-filtration or cross flow filter in the steps A, the producing water ratio scope is 40～90%.
3. treatment process according to claim 1, wherein, clear liquid is transported to and carries out polymerization production after polymeric kettle replenishes the de-salted water that weight ratio concentration is 20-60% among the step B.
4. strainer that is used for the said treatment process of claim 1, its structure is:
One shell is provided with a water-in, and the top of this shell is provided with a concentrated water drainage mouth of a river, and the bottom is provided with one and produces the water water outlet, and the inside of shell is provided with micropore filter element.
5. strainer according to claim 4, wherein, micropore filter element be by stupalith and macromolecule polymer material by mass ratio 1: the 7.5-8.5 sintering forms.
6. strainer according to claim 5, wherein, high molecular polymer is SE and Vilaterm by mass ratio 1: 3.5-4.5 mixes.
7. according to claim 4 or 5 described strainers, wherein, the aperture of micropore filter element is 0.22-0.45 μ m.
8. strainer according to claim 4, wherein, the filter backwash mode is that air purge, washing and air water mixing are washed; The backwash cycle is 30～120min.
9. strainer according to claim 4, wherein, the micropore filter element regeneration of strainer is matting, ultrasonic cleaning or sintering.
10. strainer according to claim 4, wherein, strainer is the closed stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103961083A CN102515287A (en) | 2011-12-02 | 2011-12-02 | Treatment method for recycling of polrvinyl chloride centrifugal mother liquor wastewater and filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103961083A CN102515287A (en) | 2011-12-02 | 2011-12-02 | Treatment method for recycling of polrvinyl chloride centrifugal mother liquor wastewater and filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102515287A true CN102515287A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103961083A Pending CN102515287A (en) | 2011-12-02 | 2011-12-02 | Treatment method for recycling of polrvinyl chloride centrifugal mother liquor wastewater and filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110078851A (en) * | 2019-04-29 | 2019-08-02 | 杰瑞德工业设备(北京)有限公司 | Polyvinyl chloride suspension polymerization |
| CN114315033A (en) * | 2021-12-30 | 2022-04-12 | 安徽华塑股份有限公司 | Polyvinyl chloride polymerization mother liquor recycling process |
-
2011
- 2011-12-02 CN CN2011103961083A patent/CN102515287A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 史志伟等: "PVC离心母液回用新工艺", 《中国氯碱》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110078851A (en) * | 2019-04-29 | 2019-08-02 | 杰瑞德工业设备(北京)有限公司 | Polyvinyl chloride suspension polymerization |
| CN110078851B (en) * | 2019-04-29 | 2021-04-23 | 杰瑞德工业设备(北京)有限公司 | Suspension polymerization method for polyvinyl chloride |
| CN114315033A (en) * | 2021-12-30 | 2022-04-12 | 安徽华塑股份有限公司 | Polyvinyl chloride polymerization mother liquor recycling process |
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Application publication date: 20120627 |