The invention discloses an electric
precipitation energy-saving control method based on the
coal quantity and the air quantity of a boiler. The method comprises the steps: obtaining current total coalquantity and current total air quantity of the boiler and electric precipitator outlet dust content; and calculating an
electric field secondary current target value according to a formula II2=[(T-Ttarget) / (Tmax-Tmin)]*(II2max-II2min)+IIcoal+IIw, and adjusting the
current electric field secondary current value of the electric precipitator to an
electric field secondary current target value. Therefore, the total
coal quantity of the boiler is used to replace the
unit load to control the electric
precipitation parameters, the control deviation caused by
coal quality change can be overcome, andthe real-time performance is better than that of the
unit load; meanwhile, the total air quantity of the boiler serves as a feedforward
signal, and a
dynamic control effect of dust in the
unit load dynamic change process can be improved; and therefore, the
automatic control effect of the electric precipitator can be improved, excessive
dust emission of a power
plant is prevented, the environment-friendly purpose is achieved, the power
utilization rate of the power
plant is reduced, and the energy-saving purpose is achieved. The invention further discloses an electric
precipitation energy-saving
control system based on the coal quantity and the air quantity of the boiler, and the beneficial effects are as mentioned above.