CN101513633A - Method for spraying PVC polymerization kettle anti-scale agent - Google Patents
Method for spraying PVC polymerization kettle anti-scale agent Download PDFInfo
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- CN101513633A CN101513633A CNA2008100141767A CN200810014176A CN101513633A CN 101513633 A CN101513633 A CN 101513633A CN A2008100141767 A CNA2008100141767 A CN A2008100141767A CN 200810014176 A CN200810014176 A CN 200810014176A CN 101513633 A CN101513633 A CN 101513633A
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- spray
- kettle
- polymerization kettle
- scale agent
- polymeric kettle
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Abstract
The invention relates to a method for spraying PVC polymerization kettle anti-scale agent. The method is characterized in that a gas phase space inside a polymerization kettle is provided with an anti-scale agent spray ring; the spray ring is provided with spray holes in different directions; a plurality of rinse spray heads are evenly distributed inside an upper seal head of a reflex condenser on the top of the polymerization kettle; the spray angle of the spray heads is 60 degrees; and the feeding proportion of atomized vapor to anti-scale agent is adjusted to be 5:1 to 7:1 by the polymerization kettle and an atomizer of the reflex condenser. The spray method optimizes the adding mode of the anti-scale agent in the polymerization kettle and the reflex condenser as well as spray process on the inner wall of the kettle, thereby improving the spray effect of the anti-scale agent inside the polymerization kettle and the reflex condenser; moreover, the spray method prolongs the operation cycle of the polymerization kettle, reduces kettle-cleaning cost and improves device production capacity and top-grade product rate.
Description
Technical field
The present invention relates to the mode that suspension type polyvinyl-chloride (PVC) production technology, particularly anti-fouling agent add in polymeric kettle and the reflux condenser, and in the technology of still inner-wall spraying.
Background technology
In the PVC suspension method production technology, the sticking still problem of polymeric kettle is the difficult problem that restriction is produced always, and coming off after the kettle pasting matter accumulation can cause the frequent generation of PVC product impurity, flake quality accident, simultaneously, serious sticking still phenomenon can influence the heat transfer of polymeric kettle, causes the production safety accident.The chlor-alkali plant 2#PVC of Shandong branch company of Chinese Petroleum Co., Ltd device is introduced U.S.'s west chemistry PVC suspension production Technology, have polymerization formula asepsis environment-protecting, single still production intensity advantages of higher, but its anti-fouling agent spraying coating process is immature, anti-fouling agent and steam atomization are out of proportion, operating control procedure science not, cause inhomogeneous, the incomplete phenomena of spraying, the polymerization kettle anti-scale effect has a long way to go with covered the comparing of the continuous thousands of stills of 1#PVC polymeric kettle, has become the restraining factors that the continuous high load capacity of device is produced.Sticking still can be more and more serious behind full 100 stills of continuous dosing for polymeric kettle, when still more than 300, the most serious position of sticking still---shaft diameter can occur and reach bulk kettle pasting matter more than 2 meters, condenser tubulation inner surface forms one deck adhesive film simultaneously, the high load capacity stable operation and the product quality of producing produced very big influence, the adhesive of reflux condenser particularly, have a strong impact on the heat energy power of removing of reflux condenser, according to the design reflux condenser remove heat account for whole polymerisation remove heat 51%, because bonding is serious, frequent fluctuation appears after causing the temperature of polymeric kettle to be controlled to feed intake full 200 stills, temperature control maximum fluctuation scope is about ± 5 ℃, the requirement of substantial deviation control accuracy ± 0.5 ℃, therefore per 2 months essential polymeric kettle and reflux condensers of cleaning, becoming influences device safe operation and steady quality principal element.
Summary of the invention
Technical problem to be solved by this invention provides a kind of spraying method of PVC polymerization kettle anti-scale agent, improve the antiseized still effect of PVC polymerization, prolong the polymeric kettle cycle of operation, reduce the clear still frequency and expense, improve device capbility and product quality high-grade-goods rate, for the good operation of installing provides safeguard.
The spraying method of PVC polymerization kettle anti-scale agent of the present invention, it is characterized in that gas-phase space is provided with anti-fouling agent spray ring in polymeric kettle, the spray orifice of different directions is set on the spray ring, uniform a plurality of Flushing nozzles in the upper cover of the reflux condenser at polymeric kettle top, the shower nozzle spray angle is 60 °, the atomizer of polymeric kettle and reflux condenser is adjusted into 5～7 with the charge proportion of atomizing steam and anti-fouling agent: 1.
The present invention has increased a spray ring in polymeric kettle, the atomizing anti-fouling agent that the spray orifice on the different directions sprays into the polymeric kettle top further evenly distributes at polymeric kettle inwall and shaft, stirring blade place, has avoided the spraying incomplete phenomena.Generally gas-phase space is provided with 1 anti-fouling agent spray ring in polymeric kettle, and the center of circle of spray ring and the center of circle of polymeric kettle are consistent, and level is installed.
A Flushing nozzle in the former reflux condenser upper cover is adjusted into a plurality of shower nozzles (transforming the multiple spot flushing as by the single-point flushing), so original spray angle is adjusted into 60 ° by 120 °, the granular size of water droplet by original medium change into present bigger than normal, main is the hitting power that has increased vertical coverage rate, by shower nozzle the uniform of still top condenser end cover so that more effective tubulation to still top condenser washes.
The charge proportion of atomizing steam and anti-fouling agent is improved, improved the spraying effect of anti-fouling agent.
Advantage of the present invention:
Optimized the mode that anti-fouling agent adds in polymeric kettle and the reflux condenser, and in the technology of still inner-wall spraying, improved the spraying effect of anti-fouling agent in polymeric kettle and reflux condenser, prolonged the polymeric kettle cycle of operation, reduce clear still expense, improved device capbility and product quality high-grade-goods rate.After adopting spraying method of the present invention, by on our company's polymeric kettle, testing, the antiseized still effect of polymeric kettle and reflux condenser significantly improves, the polymerization temperature control curve is normal, not having the out-of-control phenomenon that departs from control accuracy takes place, kettle cleaning period has been reached more than 700 stills time by original 200-300 still, the cycle of operation has reached 818 stills continuously, prolonged nearly 3 times of the polymeric kettle cycle of operation, thereby reduced clear still expense, device capbility and product quality high-grade-goods rate have been improved, for the peace of device, steady, long, full, excellent operation provide guarantee.
The specific embodiment
The 2#PVC of Shandong branch company device (introducing U.S.'s west chemistry PVC suspension production Technology), a spray ring is installed in the polymeric kettle PLY-3E1 still, the center of circle of spray ring and the center of circle of polymeric kettle are consistent, and level is installed.The horizontal centre distance polymeric kettle still top of spray ring is 400m.The caliber of spray ring is 2 ".The diameter of spray ring is 1/3 of a polymeric kettle internal diameter, promptly
1400mm.The spray endless tube is opened
The 6mm aperture, on different directions co-apertured 48, percent opening is about 70%.
Transform the original nozzle of still top condenser CN-3E1 as four nozzles, spray angle is adjusted into 60 ° by 120 ° and improves developing result.
The atomizer of polymeric kettle and reflux condenser is adjusted into 5: 1 with the charge proportion of atomizing steam and anti-fouling agent.
Transform the back and can find that from opening the effect of checking behind the still antiseized still effect is fairly obvious, can reach more than 800 stills and need not drive still.
Claims (2)
1, a kind of spraying method of PVC polymerization kettle anti-scale agent, it is characterized in that gas-phase space is provided with anti-fouling agent spray ring in polymeric kettle, the spray orifice of different directions is set on the spray ring, uniform a plurality of Flushing nozzles in the upper cover of the reflux condenser at polymeric kettle top, the shower nozzle spray angle is 60 °, the atomizer of polymeric kettle and reflux condenser is adjusted into 5～7 with the charge proportion of atomizing steam and anti-fouling agent: 1.
2, spraying method according to claim 1 is characterized in that gas-phase space is provided with 1 anti-fouling agent spray ring in polymeric kettle, and the center of circle of spray ring and the center of circle of polymeric kettle are consistent, and level is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100141767A CN101513633A (en) | 2008-02-22 | 2008-02-22 | Method for spraying PVC polymerization kettle anti-scale agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100141767A CN101513633A (en) | 2008-02-22 | 2008-02-22 | Method for spraying PVC polymerization kettle anti-scale agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101513633A true CN101513633A (en) | 2009-08-26 |
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ID=41038342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100141767A Pending CN101513633A (en) | 2008-02-22 | 2008-02-22 | Method for spraying PVC polymerization kettle anti-scale agent |
Country Status (1)
| Country | Link |
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| CN (1) | CN101513633A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601825A (en) * | 2013-11-27 | 2014-02-26 | 昊华宇航化工有限责任公司 | Anti-sticking method of polyvinyl chloride polymerization kettle |
| CN104371047A (en) * | 2014-11-12 | 2015-02-25 | 天伟化工有限公司 | Method for spraying antisticking agent of vinyl chloride polymerization kettle |
| CN106493057A (en) * | 2016-10-17 | 2017-03-15 | 石河子开发区天业化工有限责任公司 | In a kind of polymerization, polymeric kettle applies the control method of wall |
-
2008
- 2008-02-22 CN CNA2008100141767A patent/CN101513633A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601825A (en) * | 2013-11-27 | 2014-02-26 | 昊华宇航化工有限责任公司 | Anti-sticking method of polyvinyl chloride polymerization kettle |
| CN103601825B (en) * | 2013-11-27 | 2015-11-18 | 昊华宇航化工有限责任公司 | The antiseized still method of pvc polymerizer |
| CN104371047A (en) * | 2014-11-12 | 2015-02-25 | 天伟化工有限公司 | Method for spraying antisticking agent of vinyl chloride polymerization kettle |
| CN104371047B (en) * | 2014-11-12 | 2016-09-14 | 天伟化工有限公司 | A kind of method of vinyl chloride polymerization reactor anti-fouling agent spraying |
| CN106493057A (en) * | 2016-10-17 | 2017-03-15 | 石河子开发区天业化工有限责任公司 | In a kind of polymerization, polymeric kettle applies the control method of wall |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090826 |