An opening degree control system and opening degree control method of a slurry supply regulating valve

Abstract

This application discloses an opening control system and an opening control method for a slurry supply regulating valve. The system realizes the target value based on the sulfur dioxide in the net flue gas through the parameter acquisition module, the basic slurry model, the compensation slurry model and the opening control module. For the purpose of closed-loop control of the opening of the slurry supply regulating valve, the system has better control over the opening of the slurry supply regulating valve than the PID control strategy based on the pH setting value of the slurry in the absorption tower in the prior art. The given slurry supply volume (the superimposed value of the basic slurry supply volume and the compensation slurry supply volume) is more conducive to controlling the concentration of sulfur dioxide in the outlet of the absorption tower below the limit value, which is operationally replaceable for the on-site staff and has improved The control effect of the opening degree control system of the slurry supply regulating valve on the wet desulfurization system can reduce the frequency of staff manually controlling the opening of the slurry supply regulating valve, reduce the labor intensity of the staff, and avoid energy and material that may be caused by manual operation. wasteful situation.

Description

technical field [0001] The present application relates to the technical field of automatic control, and more specifically, relates to an opening degree control system and an opening degree control method of a slurry supply regulating valve. Background technique [0002] At present, the wet desulfurization process at home and abroad is mainly through the limestone-gypsum method, and the pH value in the absorption tower is maintained at the range of 5.6 to 5.8 through the slurry supply system and the circulation system, and the sulfur dioxide in the flue gas emitted by the coal-fired power plant is oxidized and absorbed. . [0003] In the prior art, the opening control method of the slurry supply regulating valve of the slurry supply system is usually based on the proportional-integral-differential (Proportion Integration Differentiation, PID) adjustment method based on the pH value in the absorption tower, but in the actual application process, it is found that this This con...

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Problems solved by technology

[0004] In order to solve the above technical problems, this application provides an opening control system and an opening control method of a slurry supply regulating valve, in order to realize the purpose of closed-loop control of the opening of the slurry supply regulating valve based on the target value of sulfur dioxide in the clean flue gas , to improve the control effect of the opening degree control system of the slurry supply regulating valve on the wet desulfurization system, reduce the frequency of staff manually controlling the opening of the slurry supply regulating valve, reduce the labor intensity of the staff, and avoid possible damage caused by manual operation Energy and material waste

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