MATEC Web Conf.
Volume 228, 20182018 3rd International Conference on Circuits and Systems (CAS 2018)
|Number of page(s)||4|
|Section||Physics and Materials Engineering|
|Published online||14 November 2018|
Application of the Coordination Control Strategy of pH and SO2 Concentration in the Desulphurization Slurry Supply
Shandong Branch of Huadian Electric Power Research Institute, Jinan, China
2 Huadian International Power Co., Ltd. Zouxian Power Plant Jining, China
a Baoying Zhu: email@example.com
The desulphurization slurry flow of the coal-fired unit is usually regulated by a single PID loop that controls the pH value of the gypsum slurry. And the desulphurization system is characterized with large inertia and serious hysteresis, which often results in SO2 concentration of the outlet exceeding the standard, and leads the operators to turn the regulating valve to manual mode. The SO2 concentration of the outlet was taken into consideration into the optimized control strategy of desulphurization slurry supply introduced in this paper, and it is with the gypsum slurry pH value for cooperative control of the slurry regulating valve. Finally, the experiment proved that after the optimization of the control strategy, the desulfurization loop could be automatically put into operation for a long time, and the SO2 concentration of the outlet keeps stable, and the comprehensive utilization rate of limestone and the automation level of auxiliary equipment are significantly improved.
© The Authors, published by EDP Sciences, 2018
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