The development of the head box automated control system of the educational- experimental plant at pulp and paper production Vitalii Rezatdinov

The aim of the research it is to develop the head box control system of technological process of stock preparation realized on the basis of educational and experimental plant. Objective

The analysis process of paper production result Continuous process. Multi-step process. The processes in the wet end of the paper machine (PM) and especially the stock inlet system play the most important role in the formation of qualitative products The main element of the stock inlet system, in terms of control system construction, is precisely the head box.

The mathematical model of the air cushion head box Scheme of the head box of closed type with an aircushion

The scheme of the head box educational- experimental plant С − compressor, V1 − adjusting valve with pneumatic positioner, V2 − adjusting valve with electrical drive, P − power pump with frequency regulated electrical drive, PT1 – aircushion pressure transmitter, PT2 – total head transmitter, V3 − air reduction gear.

Modeling of the system of the head box automatic control in the Matlab Simulink

The graphs of transfer processes H is total head h is head box stock level Ps is stock pressure Pa is air pressure

Conclusions In such a way the head box control system is considered to be the integral part of the developed intellectual automated control system of the physical model, which gives the opportunity of practical mastering and experimental work with microprocessor means of automation, primary measuring converters and actuating equipment

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