Study on Flue Gas Temperature Control and Water Recovery of Coal-fired Units
Based on the plant-scale coal-fired units model,multiple exhaust gas temperature control technology options such as flue gas heating,flue gas condensing,and flue gas condensing reheat are evaluated to quantitatively elaborate the synergistic effects of condensing method in flue gas waste heat utilization,pollutant control,and moisture recovery. The energy consumption and moisture recovery effects of various cooling source solutions,such as surface water,cooling tower,and absorption heat pump,are quantitatively compared. The study shows that when the flue gas temperature at the outlet of the desulfurization tower is 50.5 ℃,the ambient temperature needs to be above 37 ℃,and flue gas temperature control technology is required to meet this requirement. The lower the temperature of the cold source of the condensing method,the better the condensation effect. The cooling effect of the surface water cold source in winter is the best,recovering 36443.32 t/h flue gas moisture. Considering the year-round operation,the optimal cold source method of condensing is the circulating cooling water of absorption heat pump evaporator,which can recover 34309.14 kg/h of condensate water.
Flue gas temperature controlMoisture recoveryCooling sourceAbsorption heat pumps
万方数据
维普
