Automatic slurry supply control system of limestone-gypsum wet flue gas desulfurization device

Abstract

The invention provides an automatic slurry supply control system of a limestone-gypsum wet flue gas desulfurization device and belongs to the field of automatic control. The slurry supply system comprises a computer PLC (programmable logic controller), a pulverized coal bunker slurry supply pump, a limestone slurry supply pump, a desulfurization CEMS (continuous emission monitoring system) analysis meter, three PH meters and two densimeters, wherein the computer PLC is taken as a core controller, and operation, stop and frequency modulation control of related equipment are completed through instruction input of a host computer, input of various sensors and input of related analog quantity. With the adoption of the automatic slurry supply control system of the limestone-gypsum wet flue gas desulfurization device, regulation of the SO2 value of treated gas after automatic slurry supply is stable, control is easier, equipment is not required to be repeatedly operated by an operator, so that the burden of the operator is greatly reduced, and stable operation of a desulfurization system is guaranteed.

Description

technical field [0001] The invention relates to the field of automatic control systems, in particular to an automatic slurry supply control system for a limestone-gypsum wet flue gas desulfurization device. Background technique [0002] Existing large-scale generating units in thermal power plants, such as the limestone-gypsum wet-process flue gas desulfurization device installed in 600MW coal-fired generating units, in the case of stable coal quality and small fluctuations in load, the operators can better meet the requirements by manually When the load changes, the SO2 parameters of the net flue gas are adjusted accordingly; when the coal quality of the system changes and some important equipment in the desulfurization system is backed up and many other problems occur, the operators cannot perform manual operations well under the conditions of large load changes and high lifting rates. The net flue gas SO2 parameters are adjusted, resulting in poor flue gas desulfurization...

AI Technical Summary

Problems solved by technology

[0002] Existing large-scale generating units in thermal power plants, such as the limestone-gypsum wet-process flue gas desulfurization device installed in 600MW coal-fired generating units, in the case of stable coal quality and small fluctuations in load, operating personnel can better meet the requirements manually. When the load changes, the SO2 parameters of the net flue gas are adjusted accordingly; when the coal quality of the system changes and some important equipment in the desulfurization system is backed up and many other problems occur, the operators cannot perform manual operations well under the conditions of large load changes and high lifting rates. Adjust the net flue gas SO2 parameters, resulting in poor flue gas desulfurization effect and serious environmental problems

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