Fume temperature uniform distribution device of rotary air preheater outlet flue

An air preheater and outlet flue technology, applied in lighting and heating equipment, combustion methods, indirect carbon dioxide emission reduction, etc., can solve problems such as deviation, affecting the performance of electrostatic precipitators, affecting dust removal effects, etc. Benefit and economic benefits, improve the performance of flue gas treatment, improve the effect of uneven flue gas temperature

Active Publication Date: 2017-02-22
CENT SOUTHERN CHINA ELECTRIC POWER DESIGN INST CHINA POWER ENG CONSULTING GROUP CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Fume temperature uniform distribution device of rotary air preheater outlet flue
  • Fume temperature uniform distribution device of rotary air preheater outlet flue
  • Fume temperature uniform distribution device of rotary air preheater outlet flue

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Embodiment 1

[0035] like Figure 2-6 As shown, a device for uniform flue gas temperature distribution at the outlet of a rotary air preheater, the device includes a U-shaped flue 1, one end of the U-shaped flue 1 is connected to the outlet 2 of the rotary air preheater, and the other end Two independent dust collector connecting pipes 3 are arranged side by side on the flue opening. The pipe of the U-shaped flue 1 is a rectangular passage, and the U-shaped flue 1 includes an outer wall surface 1.1 and an inner wall surface 1.2 parallel to each other, and the outer wall surface 1.1 and the inner wall surface. A plurality of rows of airfoil blades 4 are arranged on the inner surface of the wall 1.2 along the direction of smoke discharge, and the deflection direction of the airfoil blades 4 on the outer wall 1.1 is opposite to that of the airfoil blades 4 on the inner wall 1.2. The airfoil blades 4 on the outer wall surface 1.1 and the airfoil blades 4 on the inner wall surface 1.2 only overl...

Embodiment 2

[0050] like figure 2 , 3 , Shown in 4, 5 and 7: the device of the present embodiment is basically the same as embodiment 1, the difference is:

[0051] The airfoil blades 4 on the outer wall surface 1.1 and the airfoil blades 4 on the inner wall surface 1.2 are arranged without any overlap in the flue, that is, the airfoil blades 4 on the inner wall surface 1.2 are located on the adjacent airfoil blades on the outer wall surface 1.1 4. A certain area between the channels formed is a full staggered arrangement.

Embodiment 3

[0053] like figure 2 , 3 , Shown in 4, 5 and 6: the device of the present embodiment is basically the same as embodiment 1, the difference is:

[0054] The arrangement in which the airfoil blades 4 on the outer wall surface 1.1 and the airfoil blades 4 on the inner wall surface 1.2 completely overlap in the flue is a fully matching arrangement.

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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...

Claims

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Application Information

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IPC IPC(8): F23L15/00F23J15/00
CPCF23J15/00F23L15/00Y02E20/34
Inventor 邹歆王辉陈牧
Owner CENT SOUTHERN CHINA ELECTRIC POWER DESIGN INST CHINA POWER ENG CONSULTING GROUP CORP
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