Research and Application of Limestone Slurry Automatic Supply in Wet Flue Gas Desulfurization
In order to improve the automation level of the wet flue gas desulfurization device(WFGD)in thermal power plants and reduce the labor intensity of operators.a data-driven SO2 concentration prediction model at the outlet of the absorp-tion tower is established based on the big data of historical and actual operation for WFGD.Combined with the desulfurization mechanism model,a limestone slurry automatic supply system is developed.The system is applied in the limestone slurry supply system of desulfurization device for 350MW turbine unit by closed-loop control,achieving automatic supply of limestone slurry.The actual operation effects show that the automatic supply system of limestone slurry adjusts in real-time according to the con-trol objectives,the pH value of the absorption tower slurry can stably be controlled,SO2 emission in clean flue gas is close to the critical value,and the consumption of limestone in the WFGD is reduced.
flue gas wet desulphurizationclosed-loop controlautomatic supplylimestone slurrythermal power plants
万方数据
维普
