Electric precipitation energy-saving control method and system based on coal quantity and air quantity of boiler

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to an energy-saving control method for electric dust removal based on boiler coal volume and air volume. The invention also relates to an electric dust removal energy-saving control system based on boiler coal volume and air volume. Background technique [0002] With the development of China's electric power technology, more and more power plants have been put into use. [0003] Thermal power generation is the main force in the development of electric power in modern society. Under the background of building a harmonious society and developing a circular economy, the development direction of thermal power technology should focus on the impact of power on the environment and on non-renewable energy. With the changes in the structure of power generation enterprises in China, the proportion of new energy power generation enterprises in the power grid is increasing, which requires ther...

AI Technical Summary

Problems solved by technology

This causes the personnel to control the electrostatic precipitator relatively lagging behind, and the electric field current cannot be adjusted in real time according to the load of the unit

And the change of unit load is slower than the change of dust content, and in the process of coal quality change, it cannot accurately represent the dust content entering the electrostatic precipitator

This method not only has environmental risks, but also leads to a higher power consumption rate of the electrostatic precipitator plant

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