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Efficient coal dust combustor for reducing smoke NOx content

A pulverized coal burner and content technology, applied in the direction of burners, burners burning powder fuel, combustion methods, etc., can solve the problems of inapplicability to small and medium-sized pulverized coal boilers

Inactive Publication Date: 2014-07-23
SHANXI LANTIAN ENVIRONMENTAL PROTECTION EQUIPCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing graded air supply pulverized coal burner is not suitable for small and medium-sized pulverized coal boilers, the present invention provides a pulverized coal burner that reduces the NOx content of flue gas

Method used

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  • Efficient coal dust combustor for reducing smoke NOx content
  • Efficient coal dust combustor for reducing smoke NOx content
  • Efficient coal dust combustor for reducing smoke NOx content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017]The pulverized coal burner for reducing flue gas NOx content includes a primary air duct 1; the inner cavity of the primary air duct 1 forms a primary air channel 2; the outer coaxial sleeve of the primary air duct 1 is provided with a mixing sleeve 3; the mixing sleeve The inlet end of 3 is connected with a mixed air inlet pipe 4; the outlet end of the mixed air sleeve 3 is provided with a mixed air expansion section 5; the inner wall of the mixed air sleeve 3 and the outer wall of the primary air pipe 1 together form an annular mixed air chamber 6; The outer coaxial sleeve of the air mixing sleeve 3 is provided with an inner secondary air sleeve 7; the inlet end of the inner secondary air sleeve 7 is connected with an inner secondary air inlet pipe 8; the outlet end of the inner secondary air sleeve 7 An inner secondary air expansion section 9 is provided; the inner wall of the inner secondary air sleeve 7 and the outer wall of the mixed air sleeve 3 together form a rin...

Embodiment 2

[0022] The pulverized coal burner for reducing flue gas NOx content includes a primary air duct 1; the inner cavity of the primary air duct 1 forms a primary air channel 2; the outer coaxial sleeve of the primary air duct 1 is provided with a mixing sleeve 3; the mixing sleeve The inlet end of 3 is connected with a mixed air inlet pipe 4; the outlet end of the mixed air sleeve 3 is provided with a mixed air expansion section 5; the inner wall of the mixed air sleeve 3 and the outer wall of the primary air pipe 1 together form an annular mixed air chamber 6; The outer coaxial sleeve of the air mixing sleeve 3 is provided with an inner secondary air sleeve 7; the inlet end of the inner secondary air sleeve 7 is connected with an inner secondary air inlet pipe 8; the outlet end of the inner secondary air sleeve 7 An inner secondary air expansion section 9 is provided; the inner wall of the inner secondary air sleeve 7 and the outer wall of the mixed air sleeve 3 together form a ri...

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Abstract

The invention relates to pulverized coal combustion technology, in particular to a pulverized coal high-efficiency burner for reducing the NOx content of flue gas. The invention solves the problem that the existing graded air supply pulverized coal burner is not suitable for medium and small pulverized coal boilers. The high-efficiency pulverized coal burner for reducing flue gas NOx content includes a primary air duct; the inner cavity of the primary air duct forms a primary air channel; the coaxial sleeve outside the primary air duct is provided with an air mixing sleeve; Mixed air inlet pipe; the outlet end of the mixed air sleeve is provided with a mixed air expansion section; the inner wall of the mixed air sleeve and the outer wall of the primary air pipe together form an annular mixed air chamber; the outer coaxial sleeve of the mixed air sleeve is equipped with an inner two The secondary air sleeve; the inlet end of the inner secondary air sleeve is connected with an inner secondary air inlet pipe. Based on a brand-new structure, the invention effectively solves the problem that the existing graded air supply pulverized coal burner is not suitable for small and medium pulverized coal boilers, and is suitable for small and medium pulverized coal boilers.

Description

technical field [0001] The invention relates to pulverized coal combustion technology, in particular to a pulverized coal burner for reducing the NOx content of flue gas. Background technique [0002] With the development of pulverized coal combustion technology and the increase of environmental protection pressure, while ensuring the full combustion of pulverized coal, suppressing the formation of NOx has become a technical problem that must be solved in the pulverized coal combustion process. In order to suppress the generation of NOx, the method of graded air supply is mainly adopted at present. The principle of staged air supply is to inject the combustion-supporting air into the combustion space in the form of multiple streams, causing the pulverized coal to be in an oxygen-deficient state and lower flame temperature in the first combustion zone, so as to control the amount of NOx generated, while the rest of the combustion-supporting air The wind is mixed in time in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D1/02
Inventor 王欢王民发郎凤娥郎鹏德张宗旺杜铭华赵红卫
Owner SHANXI LANTIAN ENVIRONMENTAL PROTECTION EQUIPCO