An intelligent energy-saving automatic control method for dust removal system in thermal power plant

Abstract

The invention discloses an intelligent energy-saving automatic control method of a dust removal system in a thermal power plant. The method comprises the following steps that a coal combustion amount,a coal ash content and a flue gas quantity of a unit are acquired in real time, then according to the fire coal amount, fire coal ash content and smoke amount of the unit, a set value Uesp of a secondary voltage U-electricity of a high-voltage power supply of an electric dust remover is calculated, and then the secondary voltage U-electricity of the high-voltage power supply of the electric dustremover is adjusted according to the set value Uesp of a secondary voltage U-electricity of the high-voltage power supply of the electric dust remover; and the actual smoke dust emission concentrationof an outlet of a wet-type electric dust collector is measured in real time, then a set value Uwesp (n) of U-wet electricity of the secondary voltage of the high-voltage power supply of the wet-typeelectric dust remover is calculated according to the actual smoke dust emission concentration of the outlet of the wet-type electric dust remover through a PID mode, and then according to a set valueUwesp (n) of the secondary voltage U-wet-type electric dust collector of the high-voltage power supply of the wet electric dust remover, the secondary voltage U-wet-type electric dust collector of thehigh-voltage power supply of the wet-type electric dust remover is adjusted. According to the method, the high-voltage power supply of the electric dust remover and the high-voltage power supply of the wet electric dust remover can be efficiently and efficiently operated under different working conditions.

Description

technical field [0001] The invention belongs to the technical field of flue gas dedusting in coal-fired power plants, and relates to an intelligent energy-saving automatic control method for dedusting systems in thermal power plants. Background technique [0002] According to the requirements of the National Development and Reform Commission, the Ministry of Environmental Protection, and the National Energy Administration in 2014, by the end of 2017, most coal-fired power plants have completed ultra-low emission transformation. Many power plants upgrade the traditional high-voltage silicon rectifier power supply of electrostatic precipitators to advanced and efficient high-frequency power supply and pulse power supply. As a new type of dust removal equipment, wet electrostatic precipitator is installed after the wet desulfurization device and has also achieved large-scale application. Wet electrostatic precipitators generally use power frequency constant current power suppl...

AI Technical Summary

Problems solved by technology

However, the unreasonable operation mode and operating parameters of the high-voltage power supply cause the high power consumption of the dust collector. The power consumption of these high-voltage power supplies accounts for more than 80% of the total power consumption of the entire dust removal system. When the parameters of the working conditions such as the quantity change, the operating parameters cannot be automatically adjusted at any time, which makes the power consumption rate of the electrostatic precipitator and wet electrostatic precipitator remain high

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