CN104371047B - A kind of method of vinyl chloride polymerization reactor anti-fouling agent spraying - Google Patents
A kind of method of vinyl chloride polymerization reactor anti-fouling agent spraying Download PDFInfo
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- CN104371047B CN104371047B CN201410632383.4A CN201410632383A CN104371047B CN 104371047 B CN104371047 B CN 104371047B CN 201410632383 A CN201410632383 A CN 201410632383A CN 104371047 B CN104371047 B CN 104371047B
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Abstract
The method of a kind of vinyl chloride polymerization reactor anti-fouling agent spraying, before vinyl chloride polymerization reactor anti-fouling agent sprays, starts high-pressure spraying system, cleans polymeric kettle still wall residue；After spray terminates, open intensification/cooling system, polymeric kettle is heated up, start vapor injection system and anti-fouling agent charging system afterwards, being sprayed in still by anti-fouling agent, after spraying, chuck hot water switches to cooling water, lowering the temperature polymeric kettle, heel row is coated with still residual solution to Waste Water Treatment.This method uses hot water intensification chuck, will be sprayed at moisture evaporation in anti-fouling agent on reactor inwall, and anti-fouling agent film-forming is on reactor inwall, it is to avoid anti-fouling agent condenses tailing edge still wall on still wall and flows down, and forms waste water and the problem being difficult to film forming.
Description
Technical field
The present invention relates to industrial polymerisation reactor antiseized still processing technology field, the spraying technology of a kind of vinyl chloride polymerization reactor anti-fouling agent.
Background technology
Chloroethylene polymerization reactor carries out polyreaction at high temperature under high pressure, participate in reaction monomers directly to contact with reactor, polyreaction may occur on reactor wall, therefore user requires by physics polishing, reactor inside surface roughness to be worked into minimum when making reactor, owing to reactor inner surface is difficult to reach the most smooth, polymer can be formed at reactor inner surface and adhere on it unavoidably, long term accumulation will form a thick layer of polymer on reactor inner surface, not only affect the heat transfer property of polymerization reaction kettle, kettle pasting matter falls into and also will have influence on product quality in product.Therefore for guaranteeing polymerization reaction kettle safe operation, depend merely on physics polishing to be difficult to solve viscous still problem, PVC Industry method of commonly used spraying anti-fouling agent in polymerization kettle anti-scale technology alleviates stick resistant kettle technology at present, anti-fouling agent is the liquid reagent containing about 5% solid effective ingredient, traditional antiseized still technique is to be sprayed into by anti-fouling agent vaporific with steam, it is condensate in polymeric kettle wall and forms the film that one layer of oleophobic is hydrophilic, vinyl chloride is isolated with metal wall, alleviates viscous still.And find in actual applications, in anti-fouling agent spraying process, the anti-fouling agent of atomization is bigger because of water content, it is difficult to adhere to polymeric kettle inwall, and the part adhered to is dirty along polymeric kettle inwall because of steam condensation, causes the waste of part anti-fouling agent.
Chinese patent CN1386766 discloses " method that anti-fouling agent is sprayed at polymeric kettle inwall ", the technical scheme is that a kind of method that anti-fouling agent is sprayed at polymeric kettle inwall, it is characterized in that, the method comprises the steps: that (1) uses the hydrops in steam emptying pipeline, simultaneously by polymeric kettle wall to 30～60 DEG C；(2) after using venturi scrubber to be atomized steam and anti-fouling agent, being sent into the spray ring being arranged on polymeric kettle top by pipeline, anti-fouling agent is sprayed by the aperture in spray ring, sprays the inwall of polymeric kettle；(3) love valve is taken to obtain by putting at polymeric kettle top with steam；(4), after using venturi scrubber to be atomized steam and anti-fouling agent, sent into the expense valve being arranged on polymeric kettle top by pipeline, spray；(5) standing 2～7 minutes, spraying terminates.The method effect is obvious, and slurries filtration device, without frequently cleaning, substantially reduces various clearance time, decreases cleaning up cost.It is clear once that kettle cleaning period can reach 500 stills.The application of anti-fouling agent spray technology significantly improves resin quality, and not only in serosity, flake, impurity control in relatively low index always, and polymerization system, particle shape are unaffected, and resin whiteness increases.But the method yet suffers from anti-fouling agent and is difficult to adhere to polymeric kettle, causing the problem that anti-fouling agent waste is serious, it uses steam to spray anti-fouling agent again after heating up, and anti-fouling agent is follow-up is difficult to stable existence, easily flow down along polymeric kettle inwall because of steam condensation, form waste water.
Summary of the invention
The present invention solves anti-fouling agent attachment difficulty in current vinyl chloride polymerization reactor anti-fouling agent spraying process, the problems such as waste is serious, by the method using the spraying of vinyl chloride polymerization reactor anti-fouling agent, the spray efficiency of anti-fouling agent can be effectively improved, reduce waste and the clear still number of times of polymeric kettle of anti-fouling agent, improve production efficiency.
The technical solution used in the present invention is: the method for a kind of vinyl chloride polymerization reactor anti-fouling agent spraying, including anti-fouling agent charging system, vapor injection system, high-pressure spraying system, intensification/cooling system, before vinyl chloride polymerization reactor anti-fouling agent sprays, start high-pressure spraying system, pure water enters automatic spray valve after high-pressure hydraulic pump pressurizes, and water under high pressure is sprayed into water smoke and cleans polymeric kettle still wall residue；After spray terminates, open intensification/cooling system, by outer tube hot water regulating valve, polymeric kettle is heated up, start vapor injection system and anti-fouling agent charging system afterwards, anti-fouling agent is delivered to ejector liquid sucting port through anti-fouling agent charge pump, anti-fouling agent is injected into vaporific by ejector by outer tube high steam, uniformly it is sprayed in still through automatic spray valve again, after spraying, open the cold water regulating valve of outer tube, chuck hot water being switched to cooling water, lowers the temperature polymeric kettle, heel row is coated with still residual solution to Waste Water Treatment.
The method of described a kind of vinyl chloride polymerization reactor anti-fouling agent spraying; its anti-fouling agent charge pump import arranges 100 mesh basket filters; remove insoluble solids that may be present in anti-fouling agent; protection automatic spray valve; outlet arranges mass flowmenter and autocontrol valve, it can be ensured that anti-fouling agent sprays at regular time and quantity.
The method of described a kind of vinyl chloride polymerization reactor anti-fouling agent spraying, its high-pressure spraying system spray pressure is 1.9～2.1MPa, can effectively remove impurity in polymeric kettle.
The method of described a kind of vinyl chloride polymerization reactor anti-fouling agent spraying, when polymeric kettle is heated up by its intensification/cooling system by the hot water regulating valve of outer tube, controlling polymeric kettle temperature is 60～75 DEG C, it is beneficial to anti-fouling agent attachment still wall, and after evaporating moisture on the still wall of heating, form one layer of hydrophilic film of the oleophobic solidified, prevention Vinyl Chloride Monomer is in reactor inner surface generation polyreaction, thus alleviates viscous still phenomenon.
The method of described a kind of vinyl chloride polymerization reactor anti-fouling agent spraying, its intensification/cooling system, after anti-fouling agent sprays, heats up after postponing 10～30s, then switches to cold water, it is ensured that the film that the anti-fouling agent being attached on still wall is formed is more stable.
The method of described a kind of vinyl chloride polymerization reactor anti-fouling agent spraying, when polymeric kettle is lowered the temperature by its intensification/cooling system by the cold water regulating valve of outer tube, controlling polymeric kettle temperature is 30～40 DEG C, makes the temperature of polymeric kettle reach feed temperature, feeds intake for polymeric kettle ready.
The method of described a kind of vinyl chloride polymerization reactor anti-fouling agent spraying, its automatic spray valve rotating speed is 0～350r/min.
The method of described a kind of vinyl chloride polymerization reactor anti-fouling agent spraying, its outer tube high-pressure steam pressure is 0.6～1.0MPa.
The invention has the beneficial effects as follows:
1. anti-fouling agent is sprayed at reactor wall by the present invention, it is possible to form one layer of effective solidification isolating membrane, and reactor inwall kettle pasting matter significantly reduces；
2. use ejector atomization anti-fouling agent, solve the problem that anti-fouling agent atomization is uneven；
3. using hot water intensification chuck, will be sprayed at moisture evaporation in anti-fouling agent on reactor inwall, anti-fouling agent film-forming is on reactor inwall, it is to avoid anti-fouling agent condenses tailing edge still wall on still wall and flows down, and forms waste water and the problem being difficult to film forming；
4. reduce the wasting of resources to lack and the emission treatment of waste water.Carry out the process of antiseized still by this technology and can save anti-fouling agent 20%, reduce containing phenols wastewater discharge simultaneously and process.
The present invention has small investment, instant effect, the advantage of technique advantages of simple, is effectively reduced environmental pollution.The composite can be widely applied in the technique of commercial production polymer.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
In Fig. 1: 1 is polymeric kettle, 2 is the cold water regulating valve of outer tube, and 3 is the hot water regulating valve of outer tube, and 4 is anti-fouling agent charge pump, and 5 is ejector, and 6 is automatic spray valve, and 7 is high-pressure hydraulic pump.
Detailed description of the invention
In 1, the method of a kind of vinyl chloride polymerization reactor anti-fouling agent of the present invention spraying, including anti-fouling agent charging system, vapor injection system, high-pressure spraying system, intensification/cooling system, before vinyl chloride polymerization reactor anti-fouling agent sprays, start high-pressure spraying system, pure water enters automatic spray valve 6 after high-pressure hydraulic pump 7 pressurizes, and water under high pressure is sprayed into water smoke and cleans polymeric kettle 1 still wall residue；After spray terminates, open intensification/cooling system, by the hot water regulating valve of outer tube 3, polymeric kettle is heated up, start vapor injection system and anti-fouling agent charging system afterwards, anti-fouling agent is delivered to ejector 5 liquid sucting port through anti-fouling agent charge pump 4, anti-fouling agent is injected into vaporific by ejector by outer tube high steam, uniformly it is sprayed in still through automatic spray valve again, after spraying, open the cold water regulating valve of outer tube 2, chuck hot water being switched to cooling water, lowers the temperature polymeric kettle, heel row is coated with still residual solution to Waste Water Treatment.
Another embodiment difference is that its anti-fouling agent charge pump import arranges 100 mesh basket filters, and outlet arranges mass flowmenter and autocontrol valve.
Another embodiment difference is that its high-pressure spraying system spray pressure is 1.9MPa.
Another embodiment difference is that its high-pressure spraying system spray pressure is 2.0MPa.
Another embodiment difference is that its high-pressure spraying system spray pressure is 2.1MPa.
Another embodiment difference is when polymeric kettle is heated up by its intensification/cooling system by the hot water regulating valve of outer tube, and controlling polymeric kettle temperature is 60 DEG C.
Another embodiment difference is when polymeric kettle is heated up by its intensification/cooling system by the hot water regulating valve of outer tube, and controlling polymeric kettle temperature is 70 DEG C.
Another embodiment difference is when polymeric kettle is heated up by its intensification/cooling system by the hot water regulating valve of outer tube, and controlling polymeric kettle temperature is 75 DEG C.
Another embodiment difference is that its intensification/cooling system, after anti-fouling agent sprays, heats up after postponing 10s, then switches to cold water.
Another embodiment difference is that its intensification/cooling system, after anti-fouling agent sprays, heats up after postponing 20s, then switches to cold water.
Another embodiment difference is that its intensification/cooling system, after anti-fouling agent sprays, heats up after postponing 30s, then switches to cold water.
Another embodiment difference is when polymeric kettle is lowered the temperature by its intensification/cooling system by the cold water regulating valve of outer tube, and controlling polymeric kettle temperature is 30 DEG C.
Another embodiment difference is when polymeric kettle is lowered the temperature by its intensification/cooling system by the cold water regulating valve of outer tube, and controlling polymeric kettle temperature is 35 DEG C.
Another embodiment difference is when polymeric kettle is lowered the temperature by its intensification/cooling system by the cold water regulating valve of outer tube, and controlling polymeric kettle temperature is 40 DEG C.
Another embodiment difference is that its automatic spray valve rotating speed is 50r/min.
Another embodiment difference is that its automatic spray valve rotating speed is 200r/min.
Another embodiment difference is that its automatic spray valve rotating speed is 350r/min.
Another embodiment difference is that its outer tube high-pressure steam pressure is 0.6MPa.
Another embodiment difference is that its outer tube high-pressure steam pressure is 0.8MPa.
Another embodiment difference is that its outer tube high-pressure steam pressure is 1.0MPa.
Claims (5)
1. the method for a vinyl chloride polymerization reactor anti-fouling agent spraying, it is characterized in that: include anti-fouling agent charging system, vapor injection system, high-pressure spraying system, intensification/cooling system, before vinyl chloride polymerization reactor anti-fouling agent sprays, start high-pressure spraying system, pure water enters automatic spray valve after high-pressure hydraulic pump pressurizes, and water under high pressure is sprayed into water smoke and cleans polymeric kettle still wall residue；After spray terminates, open intensification/cooling system, by the hot water regulating valve of outer tube by polymerization kettle temperature raising to 60～75 DEG C, start vapor injection system and anti-fouling agent charging system afterwards, anti-fouling agent is delivered to ejector liquid sucting port through anti-fouling agent charge pump, anti-fouling agent is injected into vaporific by ejector by outer tube high steam, uniformly it is sprayed in still through automatic spray valve again, after spraying, will heat up/cooling system intensification delay 10～30s, open the cold water regulating valve of outer tube again, chuck hot water is switched to cooling water, polymeric kettle temperature is made to be reduced to 30～40 DEG C, heel row is coated with still residual solution to Waste Water Treatment.
The method of a kind of vinyl chloride polymerization reactor anti-fouling agent the most according to claim 1 spraying, it is characterised in that: anti-fouling agent charge pump import arranges 100 mesh basket filters, and outlet arranges mass flowmenter and autocontrol valve.
The method of a kind of vinyl chloride polymerization reactor anti-fouling agent the most according to claim 1 spraying, it is characterised in that: high-pressure spraying system spray pressure is 1.9～2.1MPa.
The method of a kind of vinyl chloride polymerization reactor anti-fouling agent the most according to claim 1 spraying, it is characterised in that: automatic spray valve rotating speed is 50～350r/min.
The method of a kind of vinyl chloride polymerization reactor anti-fouling agent the most according to claim 1 spraying, it is characterised in that: outer tube high-pressure steam pressure is 0.6～1.0MPa.
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| CN109351729A (en) * | 2018-10-28 | 2019-02-19 | 天津大沽化工股份有限公司 | A kind of polymeric kettle inner wall washing method |
| CN113461844A (en) * | 2021-06-28 | 2021-10-01 | 天伟化工有限公司 | Production method of low-polymerization-degree gas-solid phase chlorinated polyvinyl chloride special resin |
| CN114634588B (en) * | 2022-03-29 | 2023-06-06 | 内蒙古宜化化工有限公司 | Process for producing polyvinyl chloride |
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| US4024301A (en) * | 1975-05-02 | 1977-05-17 | The B. F. Goodrich Company | Internally coated reaction vessel for use in olefinic polymerization |
| EP0020476A1 (en) * | 1978-10-23 | 1981-01-07 | Goodrich Co B F | Coating polymerization reactors with oligomers derived from polyhydric phenols plus a bleach. |
| US4732784A (en) * | 1982-05-19 | 1988-03-22 | Atochem | Process for treating a polymerization reactor |
| CN1386766A (en) * | 2002-06-12 | 2002-12-25 | 上海氯碱化工股份有限公司 | Process for spraying detackifier on inner surface of polymerizing reactor |
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| US4024301A (en) * | 1975-05-02 | 1977-05-17 | The B. F. Goodrich Company | Internally coated reaction vessel for use in olefinic polymerization |
| EP0020476A1 (en) * | 1978-10-23 | 1981-01-07 | Goodrich Co B F | Coating polymerization reactors with oligomers derived from polyhydric phenols plus a bleach. |
| US4732784A (en) * | 1982-05-19 | 1988-03-22 | Atochem | Process for treating a polymerization reactor |
| CN1386766A (en) * | 2002-06-12 | 2002-12-25 | 上海氯碱化工股份有限公司 | Process for spraying detackifier on inner surface of polymerizing reactor |
| CN1657546A (en) * | 2005-02-05 | 2005-08-24 | 锦化化工（集团）有限责任公司 | Process for preparing polyvinyl chloride in 70.5 mcube polymeri reactor |
| CN101513633A (en) * | 2008-02-22 | 2009-08-26 | 中国石油化工股份有限公司 | Method for spraying PVC polymerization kettle anti-scale agent |
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Effective date of registration: 20160105 Address after: North Road 832000 the Xinjiang Uygur Autonomous Region Shihezi Development Zone No. 36 Applicant after: Tian Wei Chemical Co., Ltd. Applicant after: Xinjiang Tianye (Group) Co., Ltd. Address before: North Road 832000 the Xinjiang Uygur Autonomous Region Shihezi Development Zone No. 36 Applicant before: Tian Wei Chemical Co., Ltd. Applicant before: Xinjiang Tianye (Group) Co., Ltd. Applicant before: XINJIANG TIANZHI CHENYE CHEMICAL CO., LTD. |
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