Intelligent control system applied to PVC drying fluidized bed

Abstract

The utility model relates to an intelligent control system for a PVC (polyvinyl chloride) drying fluidized bed device, and aims at solving the problems of multiple unmeasurable characteristics, complex process, tedious control process and lagged response of the fluidized bed device, so that the steam consumption is reduced, and the product quality is improved. According to the technical scheme, firstly, the actual feeding amount entering a system is determined through a material concentration soft measurement module in combination with the current actual slurry flow, and preliminary estimation of heat needed for drying is achieved; secondly, by analyzing the characteristics of the fluidized bed, data of related heat sources such as all estimated actual feeding amounts, hot water, hot air, steam and the like of the materials in the bed within the staying heating section duration is counted, real-time iterative calculation is performed on the heat required by the staying materials in the bed, the heat required by the materials in the bed is obtained, and the core bed temperature of the fluidized bed is corrected; and next, a heat source proportion and a device fluidization heat source limiting condition are designed through a bed temperature and a fluidized bed process, corresponding heat change of each heat source is allocated, and a steam valve is guided to adjust the steam consumption.

Description

technical field [0001] The invention relates to the technical field of chlor-alkali chemical industry, in particular to an intelligent control system for a polyvinyl chloride drying optimization method based on coupling of various unmeasurable factors and process coupling. Background technique [0002] Polyvinyl chloride, referred to as PVC in English, is a polymer formed by polymerization of vinyl chloride monomer (VCM) in peroxide, azo compound and other initiators or under the action of light and heat according to the mechanism of free radical polymerization. . PVC used to be the most widely used general-purpose plastic in the world. There are two major consumer markets for PVC in my country: hard products and soft products. Hard products are mainly various profiles, pipes, plates, hard sheets and blow-molded products, etc.; soft products are mainly films, wires and cables, artificial leather, fabric coatings, various hoses, gloves, toys, floor coverings, etc. material...

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is to invent an intelligent control system for a fluidized bed device, overcome the problems of multiple unmeasured characteristics of the device, complicated process and lengthy control process, and difficult process control response, and realize the intelligentization of the device Control, greatly improving the stability and uniformity of product quality, achieving the goal of reducing steam consumption, improving product quality, and stabilizing the long-term operation of the device

[0006] In order to solve the unmeasurable characteristic of the material slurry concentration, the present invention adopts the operating parameters of the centrifuge to develop a soft measurement method to characterize the material concentration, so as to overcome the problem that the feeding amount of the drying system cannot be measured due to the change of the material slurry concentration

[0007] In order to solve the characteristics that physical properties such as material porosity and fineness cannot be measured online, a moisture content prediction module combined with device load factors was invented, which solved the problem that the moisture content at the heating terminal cannot be measured and cannot be measured online according to the change of physical properties of the material. Timely Response to Defects

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