Optimization control system for energy system of drying part of paper machine

Abstract

The invention discloses an optimization control system for the energy system of the drying part of a paper machine. The optimization control system comprises a newly-added sensor group, an industrial configuration software module, a relation database and a control model library, wherein the newly-added sensor group is connected with the DCS of the drying part in a signaling way, the industrial configuration software module is connected with the DCS of the drying part and the QCS of the paper machine through an SCADA in a signaling way, the relation database is connected with the industrial configuration software module in a signaling way and the control model library is connected with the relation database in a signaling way. The invention can dynamically and accurately control the key variants of the energy system of the drying part of the existing paper machine in real time according to the characteristics of the paper drying process, can minimize the dependence on operator experiences, can improve the paper drying efficiency and can reduce energy consumption of the drying part, thereby realizing the optimum operation of the energy system of the drying part of the paper machine.

Description

technical field [0001] The invention relates to an optimization control system for the drying section of a paper machine, in particular to an energy optimization control system for the drying process of a multi-cylinder paper machine with a fully enclosed drying section. Background technique [0002] The composition of the drying section of the paper machine is different due to the different types of paper produced. Except for the paper machine that produces tissue paper, which is a Yankee dryer with a large diameter, the drying section of other paper machines is composed of multiple sets of dryers. Composed and enclosed in a fully enclosed, semi-enclosed or open air hood, the paper machine that requires surface sizing, and its drying section also includes a surface sizing system. The drying process is as follows: the wet paper sheet with a dryness of 33% to 55% after being pressed enters the drying section of the paper machine and gradually removes residual impurities in th...

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Problems solved by technology

In addition, factors affecting it are: the existing DCS (Distributed Control System, here refers to the distributed control system) is not corrected in time, and the measurement deviation of some key variables is relatively large, which cannot accurately reflect the real conditions of the drying section of the paper machine

[0010] At present, in the DCS of the drying section of the paper machine, the control of the paper drying process usually adopts the conventional PID control. Due to the complex dynamic characteristics such as strong coupling, large hysteresis and nonlinearity between the control variable and the controlled variable in the drying process, And there are strict constraints, so that the conventional PID control cannot accurately adjust the main variables of the energy system of the drying section according to the actual situation of the paper machine, and cannot achieve satisfactory control effects, which not only causes waste of energy, but also does not meet the requirements of construction saving. factory requirements

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