EVA Copolymerization Control for Recovery Blockage Prevention
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Solution Overview
Problem
The EVA copolymerization process faces challenges with raw material recovery blockage, leading to quality degradation due to low conversion rates and high adhesion of vinyl acetate, which hinders continuous production.
Innovation Solution
A system and method that includes a database for analysis, a VA content estimation unit, a molecular weight distribution estimation unit, and a recovery system blockage estimation unit to predict and control blockage by estimating VA content and molecular weight distribution, adjusting processing conditions to prevent blockage in the recovery process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large amount of unreacted raw materials are recovered due to low conversion rate, then productivity is improved, but recovery system blockage occurs due to high adhesion of vinyl acetate
Solution Approach 1:
The system performs preliminary estimation of VA content, molecular weight distribution, and blockage degree before the recovery process occurs. By predicting these parameters in advance using processing conditions and historical data, the system can take preventive actions to avoid blockage before it happens, resolving the contradiction between recovering more raw materials and preventing recovery system blockage
Solution Approach 2:
The system establishes a feedback loop where processing conditions are continuously monitored, VA content and molecular weight distribution are estimated, and blockage degree predictions are fed back to adjust processing parameters. This closed-loop control allows the system to maintain high conversion rates while dynamically preventing recovery blockage through real-time parameter adjustment
2Manufacturing precision
If vinyl acetate is used to improve elasticity and adhesion, then product quality is improved, but recovery system blockage frequently occurs due to high adhesion
Solution Approach 1:
The system changes processing parameters (temperature, pressure, catalyst amounts, residence time) to control the molecular weight distribution and VA content of the copolymer. By optimizing these parameters, the system maintains the high adhesion properties of VA for product quality while controlling the molecular characteristics that cause recovery blockage, thus resolving the contradiction between product quality and recovery system reliability
Data Source
AI summary
Disclosed are a system for controlling an ethylene vinyl acetate (EVA) copolymerization process and a method of controlling the same. The system for controlling the EVA copolymerization process may include a database for analysis configured to store analysis data obtained by matching processing conditions with measured data for first EVAs produced under the processing conditions, a computer programmed to estimate a VA content with respect to second EVA using the analysis data, a computer programmed to estimate a molecular weight distribution of the second EVA using the VA content estimated in the VA content estimation unit and processing factors corresponding thereto, and a computer programmed to estimate a recovery system blockage phenomenon using the VA content estimated and the molecular weight distribution estimated.