Rotary air preheater outlet flue flue gas temperature distribution device

Abstract

The invention discloses a fume temperature uniform distribution device of a rotary air preheater outlet flue. The fume temperature uniform distribution device comprises a U-shaped flue, a flue opening of one end of the U-shaped flue is connected with a rotary air preheater outlet, and two independent deduster connecting pipes are arranged on a flue opening of the other end of the flue side by side. The pipeline of the U-shaped flue is a rectangular channel, the U-shaped flue comprises an outer wall surface and an inner wall surface, and the outer wall surface and the inner wall surface are mutually parallel. A plurality of airfoil blades are arranged on the inner surfaces of the outer wall surface and the inner wall surface in the direction of flue gas emission, and the deflecting directions of the airfoil blades on the outer wall surface and the airfoil blades of the inner wall surface are opposite. According to the fume temperature uniform distribution device of the rotary air preheater exit flue, the problem that fume temperature in an air preheater outlet flue of a power plant is nonuniform is efficiently relieved, the flue gas treatment performance of downstream flue gas treatment devices of the power plant is improved, and great social benefits and economic benefits are predicted to obtain.

Description

technical field [0001] The invention relates to a flue gas treatment device of a coal-fired thermal power plant in the electric power industry, in particular to a device for uniformly distributing the flue gas temperature at the outlet flue of a rotary air preheater. Background technique [0002] If a rotary air preheater is used in the flue air system of a coal-fired thermal power plant, due to the structure and working principle of the rotary air preheater (see attached figure 1 ) will cause a large deviation in the distribution of the smoke temperature at both ends of the horizontal direction of the outlet flue (15-25°C, see the attached Figure 5 ), which in turn leads to a large deviation in the inlet smoke temperature of different branches of its downstream equipment (such as low and low temperature heat exchangers, electrostatic precipitators, etc.), which affects the working performance of the electrostatic precipitator and affects its dust removal effect. Contents...

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Problems solved by technology

[0002] If a rotary air preheater is used in the flue air system of a coal-fired thermal power plant, due to the structure and working principle of the rotary air preheater (see attached figure 1 ) will cause a large deviation in the distribution of the smoke temperature at both ends of the horizontal direction of the outlet flue (15-25°C, see the attached Figure 5 ), which in turn leads to a large deviation in the inlet smoke temperature of different branches of its downstream equipment (such as low and low temperature heat exchangers, electrostatic precipitators, etc.), which affects the working performance of the electrostatic precipitator and affects its dust removal effect

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