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Low-oxygen low-nitrogen combustion system for coal-fired chain grate boiler

A chain boiler, low-nitrogen combustion technology, applied in the field of boiler combustion, can solve the problems of high nitrogen oxide content, difficult combustion of raw coal, low combustion temperature, etc., and achieves high temperature, which is beneficial to waste heat recovery and improves combustion efficiency.

Inactive Publication Date: 2016-05-04
董龙标
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In such a structure, the raw coal is burned on the grate, the combustion temperature is relatively low, the combustion time is short, the raw coal is difficult to burn completely, the combustion efficiency is low and the nitrogen oxide content in the flue gas is high, causing serious pollution to the environment

Method used

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  • Low-oxygen low-nitrogen combustion system for coal-fired chain grate boiler
  • Low-oxygen low-nitrogen combustion system for coal-fired chain grate boiler
  • Low-oxygen low-nitrogen combustion system for coal-fired chain grate boiler

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Coal-fired chain boiler low-oxygen low-nitrogen combustion system, such as figure 2 and image 3 As shown, it includes a furnace 1, a combustion cylinder 17, a fan coal mill 5 and a fuel delivery pipe 18. A partition 14 is arranged in the furnace 1 to divide the furnace 1 into a combustion zone and a heat absorption zone 9. On the partition 14 At least one heat conduction channel 13 is provided to communicate the combustion zone with the heat absorption zone 9 . The baffle 14 can make the high-temperature combustion flame entering the combustion zone fully superimposed and mixed, which is beneficial to increase the combustion temperature and make the fuel burn more fully. Two combustion cylinders 17 are respectively arranged on two opposite side walls of the furnace 1 , and the combustion cylinders 17 are connected and communicated ...

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Abstract

The invention discloses a low-oxygen low-nitrogen combustion system for a coal-fired chain grate boiler. The low-oxygen low-nitrogen combustion system comprises a hearth, combustion cylinders, a fan coal mill and a fuel conveying pipe. A partition plate is arranged in the hearth and partitions the hearth into a combustion region and a heat absorption region. The partition plate is provided with at least one heat conducting passageway so that the combustion region can communicate with the heat absorption region. The two opposite side walls of the hearth are each provided with one combustion cylinder. The combustion cylinders communicate with the hearth. The heat absorption region is provided with an opening connected with a first smoke lead-in pipe. The first smoke lead-in pipe is connected with the fan coal mill. The fan coal mill is connected with a raw coal input pipe. An output opening of the fan coal mill is connected with the combustion cylinders through the fuel conveying pipe. The low-oxygen low-nitrogen combustion system for the coal-fired chain grate boiler has the following beneficial effects that complete combustion can be achieved, and the highest calorific power can be released; raw coal combustion acceleration is facilitated, the burnout rate is increased, and waste heat recovery is facilitated; and complete combustion of raw coal can be guaranteed, and meanwhile emission of nitrogen oxide can be reduced by over 30%.

Description

【Technical field】 [0001] The invention relates to the technical field of boiler combustion, in particular to a coal-fired chain boiler low-oxygen and low-nitrogen combustion system that improves combustion efficiency and effectively reduces nitrogen oxide emissions. 【Background technique】 [0002] Nitrogen oxides include various compounds such as nitrous oxide (N2O), nitrogen monoxide (NO), nitrogen dioxide (NO2), dinitrogen trioxide (N2O3), dinitrogen tetroxide (N2O4) and five Dinitrogen oxide (N2O5), etc. Except for nitrogen dioxide, other nitrogen oxides are extremely unstable, and turn into nitrogen dioxide and nitric oxide when exposed to light, humidity or heat, and nitrogen monoxide turns into nitrogen dioxide. Nitrogen oxides are toxic to varying degrees. [0003] Most of the NOx emitted by human activities comes from the combustion process of fossil fuels, such as the combustion process of automobiles, aircraft, internal combustion engines and industrial furnaces;...

Claims

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Application Information

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IPC IPC(8): F23B40/00F23K1/04
CPCF23B40/00F23K1/04
Inventor 董龙标刘效洲张宇
Owner 董龙标
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