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Polyvinyl chloride polymerization production process real-time measurement control system

A production process and real-time measurement technology, applied in the direction of biological neural network model, neural architecture, neural learning method, etc., can solve the problems of tediousness, low precision, lag, etc., and achieve the goal of improving prediction accuracy, strong practicability, and simplified composition Effect

Pending Publication Date: 2021-07-09
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Application Information

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Problems solved by technology

However, the measurement of VCM conversion rate by traditional measurement tools is very cumbersome, lagging, and the accuracy is not high.

Method used

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  • Polyvinyl chloride polymerization production process real-time measurement control system
  • Polyvinyl chloride polymerization production process real-time measurement control system

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings.

[0025] The system of the present invention collects various data of the polymerization kettle through sensors such as pressure, temperature and flow installed on the polymerization kettle, and field transmitters, and transmits them to the lower computer. The lower computer is connected with the actuator and the upper computer to convert the model signal. The digital signal is transmitted to the host computer. The host computer transmits the signal with the soft sensor model, data processing and analysis, and transmits the analysis result to the soft sensor model (known technology); the result of the soft sensor model predicting the conversion rate of VCM satisfies the requirement Real-time control requirements of the production process.

[0026] As shown in the figure, the system of the present invention includes a field transmitter installed...

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Abstract

A polyvinyl chloride polymerization production process real-time measurement control system relates to a polyvinyl chloride polymerization measurement control system, the system is installed on a polymerization kettle and is provided with a temperature transmitter (4), a pressure transmitter (5) and a flow transmitter (6), the field transmitters transmit collected information to a lower computer (2), the lower computer (2) is connected with an execution mechanism and an upper computer (1), the upper computer (1) performs signal transmission with the soft measurement model; the sensor is connected with the lower computer (2), the actuating mechanism regulating valve (3) is also connected with the lower computer (2), the lower computer (2) is connected with the upper computer (1), and the measurement model is communicated with the upper computer (1) in a communication mode; the soft measurement model predicts the conversion rate to complete real-time control; and the actuating mechanism is a regulating valve (3) and is connected with a switch for controlling the water outlet of the cold water tank (hot water tank) according to the temperature of the jacket of the polymerization kettle so as to control the condition of the PVC resin. According to the method, online measurement is accurately and efficiently realized, the prediction precision of the PVC polymerization conversion rate is remarkably improved, and the real-time control requirement is met.

Description

technical field [0001] The invention relates to a resin polymerization measurement and control system, in particular to a real-time measurement and control system for polyvinyl chloride polymerization production process. Background technique [0002] Polyvinyl chloride (referred to as PVC) is one of the earliest plastic varieties to achieve industrial production in the world. It has the advantages of non-flammability and high strength, and is widely used in industry, agriculture, electric power, construction, medical treatment and daily necessities. The main raw material for PVC production is vinyl chloride monomer (VCM), which undergoes polymerization in a polymerization tank. With the development trend of large-scale polymerization kettles and the in-depth research on vinyl chloride polymerization, the conversion rate of a single kettle has been further improved, which is of great significance for increasing production capacity and reducing production costs. The conversio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N3/04G06N3/08C08F14/06C08F2/00C08F2/01
CPCG06N3/08C08F14/06C08F2/00C08F2/01G06N3/045
Inventor 高淑芝张毅蒙李琨李天池张义民
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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