Paper pulp quality control method and system of high-concentration defibrination system

Abstract

The invention provides a paper pulp quality control method and system of a high-concentration defibrination system. The method comprises the steps that the feeding spiral rotating speed, abrasive wheel clearance, dilution water flow, yield, mill load and paper pulp concentration of the high-concentration defibrination system are collected; a high-concentration defibrination system paper pulp quality control model is used for operation variable prediction; predicated operation variables are sent to an executing mechanism of the high-concentration defibrination system. The system comprises a data collecting unit, an operation variable prediction unit and an output paper pulp quality control unit. Based on high-concentration disc mill input and output relevant data measured by a sensor on a chemical mechanical pulping production line, an AIC criterion is combined to determine the order of a submodel, a submodel parameter is obtained through a forgetting factor least square algorithm, a mechanism model of the paper pulp quality freeness index is combined to build a Wiener model structure of the a high-concentration defibrination system, the quadratic performance index is optimized through a sequential quadratic programming algorithm, and the pulping output paper pulp quality index-freeness is effectively controlled.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking process control, in particular to a pulp quality control method and system for a high-consistency refining system. Background technique [0002] Chemi-Thermo-Mechanical Pulping (CTMP) is developed on the basis of traditional Thermo-Mechanical Pulping (Thermo-Mechanical Pulping, TMP), and a period of chemical impregnation treatment is usually added before the TMP production line. That is, after the wood chips are preheated, they are impregnated with chemicals, and then the wood chips are ground into slurry according to the TMP production method. Because of its advantages such as strong raw material adaptability, high utilization rate of wood chips, high pulp yield, wide product application and simple process equipment, it is widely used in the pulp and paper industry. As the main process in the CTMP production process, the high-consistency refining system is a typical process with ...

AI Technical Summary

Problems solved by technology

However, the ultimate control goal of the high-consistency refining system is to obtain the desired pulp quality, but the current control of the high-consistency refining system is to control the operating state variables of the system. , but the cycle of assay analysis is longer, usually every few hours

It is obviously difficult to meet the requirements of real-time monitoring and control based on the high-consistency refining system

In addition, the complex dynamic characteristics of the high-consistency refining system itself and the limitations of online measuring instruments make the modeling and control of the high-consistency refining system extremely difficult

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