Material balance intelligent control method for post-treatment of polyvinyl chloride polymer
A polyvinyl chloride and material balance technology, applied in the material balance and intelligent control of polymer post-treatment after vinyl chloride polymerization, in the field of material balance intelligent control of polyvinyl chloride polymer post-treatment, to avoid material breakage and accumulation Effect
Active Publication Date: 2021-11-02
辛集市智胜中小企业技术服务有限公司
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Problems solved by technology
[0006] The technical problem to be solved in the present invention is to provide a material balance intelligent control method for post-treatment of polyvinyl chloride polymers, so as to solve the problem of polyvinyl chloride resin production. The problem of balance and control of the continuous process of post-processing of the material, in order to ensure the effect of removing residual vinyl chloride, realize the automatic control of the material balance of the polymerization kettle-polymer post-treatment of polyvinyl chloride resin production and the operation of the stripper, and stabilize the process conditions, collision-free switching, safe operation, and ensure material balance and process indicators
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[0051] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0052] The typical process flow between vinyl chloride polymerization and stripping tower is as follows: figure 1 Shown:
[0053] The vinyl chloride polymerization reaction is a batch process with multiple kettles running, feeding, heating, reacting and discharging to the discharge tank 2 one by one in time. The conversion rate of the polymerization reaction is generally controlled at 80% to 85%. Although the unreacted vinyl chloride is recovered during the discharge process, there is still residual vinyl chloride; In the later stage of the material process, water washing is also carried out, so the water content in the polyvinyl chloride resin slurry is relatively large.
[0054] The discharge conditions after the reaction of the single polymerization kettle 1 is completed: 1) there is no reactor for the discharge process; 2) the r...
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The invention discloses a material balance intelligent control method for post-treatment of polyvinyl chloride polymer. The material balance intelligent control method comprises the following steps: S1, calculating the feeding amount of a stripping tower on line; s2, adjusting and balancing the feeding amount of the stripping tower while the step S1 is carried out; and gradually iteratively adjusting the temperature and the feeding flow in the stripping tower according to a set flow adjustment target value by adopting a hill climbing algorithm. The online calculation of the feeding amount of the stripping tower is a fundamental way for solving automatic balance; meanwhile, in the flow adjusting process, the temperature and the feeding flow in the tower are gradually and iteratively adjusted according to a set flow adjusting target value by adopting a hill climbing algorithm similar to the nature, so that the effect of removing the residual vinyl chloride is ensured, and the material balance of polymerization kettle-polymer post-treatment in polyvinyl chloride resin production and the automatic control of the operation of the stripping tower are realized; the working condition is stable, collision-free switching is achieved, operation is safe, and material balance and process indexes are ensured.
Description
technical field [0001] The invention relates to the technical field of intelligent control of chlor-alkali chemical industry and petrochemical industry, and more specifically relates to a material balance intelligent control method for post-treatment of polyvinyl chloride polymer, which is applied to the material balance and intelligent control technology of polymer post-treatment after vinyl chloride polymerization reaction . Background technique [0002] Polyvinyl chloride polymerization is one of the important processes in the production of polyvinyl chloride resin. The resin after polymerization contains incompletely reacted residual monomer (vinyl chloride), dispersion medium (water) and slurry with some water entrained in the water washing process. Vinyl chloride polymerization is a batch reaction process, while polymer post-treatment is a continuous process of continuously removing residual vinyl chloride, centrifugally separating surface moisture and fluidized bed dr...
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Login to view more IPC IPC(8): G05B19/418C08F6/00
CPCG05B19/41875C08F6/00G05B2219/32368Y02P90/02
Inventor 杨广鑫刘占查
Owner 辛集市智胜中小企业技术服务有限公司
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