Advanced pulp bleaching process control system

Abstract

The invention discloses an advanced pulp bleaching process control system. The control system is connected with an existing bleaching process control DCS signal, and comprises an industrial configuration software module, a relational database and a control model base; wherein, the bleaching process control DCS is in signal connection with the industrial configuration software module, the industrial configuration software module is in signal connection with the relational database, and the relational database is in signal connection with the control model base. The bleaching process control system can automatically control addition amount of a bleaching agent according to the quality indexes of dynamic change of the pulp before bleaching, and minimize the bleaching cost and consumption of the bleaching agent on the premise of meeting the quality indexes of the bleached pulp, which can reduce 5%-15% of the cost and reduce whiteness standard deviation of the bleached pulp by 20%-50%.

Description

technical field [0001] The invention relates to a papermaking advanced process control (APC, advance Process Control) system, in particular to an advanced process control system for optimally controlling the pulp bleaching process. Background technique [0002] The paper industry is an important basic raw material industry that is closely related to the development of the national economy and social undertakings. According to statistics in 2004, the energy utilization rate of general large and medium-sized papermaking enterprises in my country is only 30%. The comprehensive energy consumption is as high as 2.5-3.0 tons of standard coal. The average water reuse rate of my country's paper industry is only 46%, and the average water consumption per ton of paper is as high as 100m 3 Above (world advanced level is only 10-20m 3 ), the fresh water consumption per 10,000 yuan of industrial output value is as high as 188 cubic meters, and the paper industry has become one of the k...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of waste and pollution caused by adding excessive bleaching agent in the existing pulp bleaching process, the present invention provides a process-oriented advanced process control system to control the pulp bleaching process. This system is suitable for multi-variable, large-delay , non-linear pulp bleaching process, which helps to reduce the consumption of bleaching agent, reduce the load of sewage treatment and reduce the pollution to the environment

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