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Whirl pulverized coal burner used for industrial stove and adopting gas recirculation

A flue gas recirculation and pulverized coal burner technology, which is applied in the direction of burners, burners, and combustion methods for burning powder fuels, can solve the problems of large NOx emissions, reduce flame temperature, and suppress fuel-type NOx Production, the effect of suppressing the production of NOx

Active Publication Date: 2010-11-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the pulverized coal burner currently used in industrial kilns has a large amount of NOx emissions, and proposes a swirling pulverized coal burner for industrial kilns that adopts flue gas recirculation

Method used

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  • Whirl pulverized coal burner used for industrial stove and adopting gas recirculation
  • Whirl pulverized coal burner used for industrial stove and adopting gas recirculation
  • Whirl pulverized coal burner used for industrial stove and adopting gas recirculation

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 Describe this embodiment, the pulverized coal burner of this embodiment comprises primary air channel 1, inner secondary air channel 4, inner secondary air swirler 4-1, outer secondary air channel 6 and outer secondary air swirl device 6-1, the primary air channel 1 is set in the annular inner secondary air channel 4, the inner secondary air channel 4 is set in the annular outer secondary air channel 6, and the inner secondary air channel 4 is An inner secondary air swirler 4-1 is installed, and an outer secondary air swirler 6-1 is installed in the outer secondary air passage 6, which is characterized in that the pulverized coal burner also includes a set of conical annular The separation ring 2, the inner flue gas recirculation passage 3 and the outer flue gas recirculation passage 5, the primary air passage 1 is provided with a group of conical separation rings 2, the small diameter end of a group of conical separati...

specific Embodiment approach 2

[0009] Specific implementation mode two: combination figure 2 To illustrate this embodiment, the pulverized coal burner of this embodiment also includes an inner flue gas recirculation swirler 3-1, and the inner flue gas recirculation channel 3 is provided with an inner flue gas recirculation swirler 3-1 , this structure is used to control the direction of the flue gas entering the furnace from the inner flue gas recirculation channel 3, so that the airflow rotation can be organized reasonably according to the characteristics of coal quality, the size of the central recirculation zone can be changed, and a suitable central recirculation zone (for pulverized coal combustion) can be formed The size of the required central recirculation zone is determined by the coal quality characteristics). Other components and connections are the same as those in the first embodiment.

[0010] In this embodiment, the inner flue gas recirculation is in the form of swirling flow, and the outer...

specific Embodiment approach 3

[0011] Specific implementation mode three: combination image 3 To illustrate this embodiment, the pulverized coal burner of this embodiment also includes an outer flue gas recirculation swirler 5-1, and the outer flue gas recirculation channel 5 is provided with an outer flue gas recirculation swirler 5-1. The structure is used to control the direction of the flue gas entering the furnace from the outer flue gas recirculation channel 5, so that the airflow rotation can be organized reasonably according to the coal quality characteristics, the size of the central recirculation zone can be changed, and a suitable central recirculation zone (required for pulverized coal combustion) can be formed. The size of the central recirculation zone is determined by the coal quality characteristics). Other compositions and connections are the same as those in Embodiment 1 or 2.

[0012] In this embodiment, the outer flue gas recirculation is in the form of swirling flow, and the inner flu...

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Abstract

The invention discloses a whirl pulverized coal burner used for an industrial stove and adopting gas recirculation, and relates to a pulverized coal burner. The invention aims to solve the problem of large discharge of NOx of the pulverized coal burner for the industrial stove. The pulverized coal burner also comprises a group of conical annular separation rings, an inside gas recirculation channel and an outside gas recirculation channel; the group of conical annular separation rings are arranged in a primary air channel; the small diameter ends of the group of conical annular separation rings face the outlet end of the primary air channel; the annular inside gas recirculation channel is arranged between the primary air channel and an inner secondary air channel; and the annular outside gas recirculation channel is arranged between the inner secondary air channel and an outer secondary air channel. The whirl pulverized coal burner can be widely applied to the industrial stove.

Description

technical field [0001] The invention relates to a pulverized coal burner. Background technique [0002] China is a country that uses coal as its main energy source. The pollution generated by the use of coal is the biggest air pollution problem in China, and 67% of the national nitrogen oxide emissions come from coal burning. According to the forecast of the Chinese Academy of Environmental Planning, the emission of nitrogen dioxide will increase from 10.655 million tons in 1995 to 25 million tons in 2010, and the emission of NOx after 2010 will be even greater. If not controlled, NOx will cause serious pollution to our country's atmospheric environment. At present, the proportion of NOx control measures adopted in the field of industrial kilns in my country is still relatively low. The pulverized coal burners used in some early industrial kilns, such as the utility model patent "Double Swirl Pulverized Coal Burner" (Chinese patent No. ZL 03241135.9, the authorized announc...

Claims

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Application Information

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IPC IPC(8): F23D1/02
Inventor 陈智超李争起申珊平朱群益杨连杰
Owner HARBIN INST OF TECH
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