Low-NOx combustor for combusting coal water slurry and combustion method

A burner, coal-water slurry technology, applied in burners, lighting and heating equipment, etc., can solve the problem of high NOx emissions

Inactive Publication Date: 2010-12-08
浙江百能科技有限公司 +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the structural defects of the current burner itself, the NOx emission of existing coal-water slurry burners is generally high

Method used

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  • Low-NOx combustor for combusting coal water slurry and combustion method
  • Low-NOx combustor for combusting coal water slurry and combustion method

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Embodiment Construction

[0019] Attached below figure 1 , to illustrate the specific implementation of the present invention.

[0020] In traditional burners, the combustion air is usually divided into two parts: "primary air" and "secondary air". In the present invention, the coal-water slurry low NOx burner divides the "secondary air" into two streams, which are called "secondary air" and "tertiary air" respectively.

[0021] In this embodiment, the coal-water slurry low NOx burner includes a coal-water slurry gun casing 4, and the primary air duct 5, the secondary air duct 6, and the tertiary air duct 7 adopt concentric circular sleeves from the inside to the outside. The pipe structure is arranged, and an ignition oil gun sleeve and an igniter sleeve are arranged in the primary air duct 5, which are used for arranging the oil gun and the electric spark ignition gun used in the automatic ignition. The combustion-supporting air is divided into three parts from the traditional two parts, and then i...

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Abstract

The invention relates to a combustor and aims to provide a low-NOx combustor for combusting coal water slurry and a combustion method. The combustor comprises a coal water slurry gun sleeve, a primary air pipe and a secondary air pipe which are sequentially and coaxially arranged from inside to outside, wherein the outside of the secondary air pipe is at least provided with a coaxially sleeved combustion air pipe for controlling NOx. In the invention, combustion-supporting air is sent into a combustion chamber by multiple layers (whiffs) to control the mixing of the combustion-supporting air and the coal water slurry so as to control the oxygen concentration of the coal water slurry in the whole combustion process; gaps are preserved between various whiffs of combustion-supporting air according to the combustion characteristics of the coal water slurry so as to delay the mixing of the combustion-supporting air and the coal water slurry; a part of the combustion-supporting air is distributed by adopting direct current, which has the effect of stopping external combustion-supporting air from mixing with flames; and the flaring angles of all nozzles of the combustor are different so that the mixing of all air layers and the flame length are reasonably controlled.

Description

technical field [0001] The invention relates to a burner, in particular to a low NOx burner for burning coal-water slurry and a combustion method. Background technique [0002] Energy and the environment are major issues in the development of my country's national economy, and the energy industry is one of the pillar industries in the development of my country's national economy. "Poor oil and rich in coal" is the national condition of our country, and the reserves of oil have forced us not to burn it only as fuel. However, there are still a large number of oil-fired power plants, oil-fired industrial boilers and oil-fired domestic boilers in China that consume a large amount of oil resources. It is necessary to seek a clean oil substitute fuel to solve the serious shortage of oil in our country. As a substitute of petroleum fuel, coal water slurry has the advantages of cheap price, low pollution, and mature technology. However, the problem of NOx emission pollution during ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D11/00F23D11/36F23D11/38
Inventor 周俊虎刘建忠黄镇宇周志军杨卫娟程军王智化岑可法杨雪峰刘茂省
Owner 浙江百能科技有限公司
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