Flue gas treatment device

Abstract

An embodiment of the invention discloses a flue gas treatment device. According to the flue gas treatment device, a wet-type electric precipitator and a flue gas heater are integrated in an integrated flue shell, and the occupied area of the wet-type electric precipitator and the flue gas heater which are integrated together is smaller than the occupied area of the wet-type electric precipitator and the flue gas heater which are arranged separately. In addition, because the integrated flue shell does not have a bidirectional filtering flue, the flue gas flowing uniformity is high, flow equalizing orifice plates are not required to be arranged in the flue, resistance of flue gas is low, power consumption of a fan is reduced, and the efficiency of a power plant is improved.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, and more specifically, relates to a flue gas treatment device for a thermal power plant. Background technique [0002] The diversification of coal quality sources in thermal power plants makes the ash characteristics of coal quality changeable. Conventional flue gas treatment devices can only control dust emissions at 20-100mg / Nm 3 However, as people pay more attention to PM2.5 and environmental protection requirements become increasingly strict, the emission standards of thermal power plants are also required to reach 20-30mg / Nm 3 , the developed areas even have a 5mg / Nm emission similar to that of natural gas boilers 3 People began to apply wet electrostatic precipitators used in the chemical industry to thermal power plants to meet stricter dust emission requirements. [0003] Wet desulfurization technology can remove most of SO 2 , the flue gas after wet desulfurization is nearl...

AI Technical Summary

Problems solved by technology

However, the wet electrostatic precipitator and the flue gas heater are scattered in different locations, and each equipment exists independently, requiring a large footprint to arrange different equipment

[0007] In addition, each two-way transitional flue will generate a large pressure drop, and the uniformity of the flue gas flow is poor. It may be necessary to install an equalizing orifice plate that will increase resistance, resulting in a high pressure drop on the side of the flue gas, an increase in the pressure head of the fan, and the operation Increased power consumption

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