Color master batch filtering pressure constant adjusting method based on proportional integral derivative control

By using real-time calculation and fuzzy reasoning, the pump flow rate is dynamically adjusted to adapt to the filter cake accumulation and pressure drift during the masterbatch filtration process. This solves the problem that fixed parameter controllers cannot adapt to nonlinear changes, and achieves constant regulation of filtration pressure and production stability.

CN122076099AActive Publication Date: 2026-05-26SHANDONG JINHAI TITANIUM RESOURCES TECH CO LTD
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Patent Information

Application Number
CN202610559781.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-27
Publication Date
2026-05-26
Estimated Expiration
2046-04-27

AI Technical Summary

Technical Problem

The existing proportional-integral-derivative controller with fixed parameters cannot adapt to the nonlinear changes in filtration resistance caused by filter cake accumulation during the masterbatch filtration process. This causes the filtration pressure to deviate from the target value in the later stages of filtration, affecting product quality and production stability.

Method used

By acquiring the current pressure, flow rate, and target pressure at the inlet of the filter device, the pressure deviation and deviation variation rate are calculated, the stage parameters of the filter cake accumulation degree and pressure drift characteristics are extracted, and the pump flow rate is dynamically adjusted using fuzzy inference and adaptive adjustment factors to maintain a constant filtration pressure.

Benefits of technology

It achieves stable control of filtration pressure throughout the entire filtration cycle, improving the stability of the production process and product quality, and adapting to dynamic characteristic changes at different filtration stages.

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Abstract

The invention belongs to the technical field of industrial process control, and particularly relates to a color master batch filtering pressure constant adjusting method based on proportional integral derivative control, and the method comprises the steps: obtaining the current pressure, the current flow and the target pressure, and calculating the pressure deviation and the deviation change rate; based on the current pressure and the current flow, stage parameters representing the filtering resistance state are obtained; extracting low-frequency drift characteristics of the pressure deviation on a time sequence and calculating a deviation degree according to the low-frequency drift characteristics; performing fuzzy reasoning on the pressure deviation and the deviation change rate to obtain an original increment; adjusting the original increment according to the stage parameters and the deviation degree to obtain a target increment; and superposing the target increment to the historical instruction to obtain a flow instruction, and outputting the flow instruction to the pumping device for execution. According to the invention, stage parameters and low-frequency drift characteristics cooperate to drive the regulatory factors, and constant control of the filter pressure of the color master batch in the whole period is realized.
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