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Micro emission pulverized coal combustion system

A technology of pulverized coal combustion and pulverized coal burner, which is applied in the direction of combustion type, combustion equipment, combustion method, etc., can solve problems such as NOx pollution of the environment, and achieve the effects of reducing NOx production, realizing NOx emission, and reducing NOx production.

Inactive Publication Date: 2019-02-05
HANGZHOU JUNENG BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem in the prior art that boiler combustion produces a large amount of NOx to pollute the environment, and aims to provide a pulverized coal combustion system with NOx micro-emission

Method used

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  • Micro emission pulverized coal combustion system
  • Micro emission pulverized coal combustion system
  • Micro emission pulverized coal combustion system

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Embodiment Construction

[0032] refer to figure 1, the micro-emission pulverized coal combustion system of the present invention includes a three-time burnout fan 1, an air-powder mixer 2, a primary powder delivery fan 3, a pulverized coal burner 4, an economizer 5, a secondary combustion-supporting fan 6, and a quaternary smoke Gas return fan 7, boiler furnace 8, boiler convection flue 9, air preheater 10, dust collector 11, induced draft fan 12, pulverized coal tower 14 and desulfurization tower 13. Described pulverized coal burner 4 is arranged on the bottom of described boiler hearth 8; Two output ends of described air-powder mixer 2 are respectively connected to described primary powder fan 3 and air-powder mixer 2, and the air The output end of the powder mixer 2 is connected to the primary air duct of the pulverized coal burner 4; the input end of the secondary combustion air blower 6 is connected to the cold side channel of the air preheater, and the output end is connected to the coal The se...

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Abstract

The invention discloses a micro-emission pulverized coal combustion system. The system comprises a tertiary burn-out fan, an air-powder mixer, a primary powder conveying fan, a pulverized coal burner, a coal economizer, a secondary combustion fan, a quaternary smoke reflux fan, a boiler furnace, a boiler convection pass, an air preheater, a dust remover, an induced draft fan and a pulverized coal tower. A unique combustion temperature control technology is formed through comprehensive design of the pulverized coal burner, a combustion chamber and the boiler furnace, so that pulverized coal is combusted at the temperature controlled to be 1,100 DEG C or lower, and production of thermodynamic NOx is reduced. Besides, with adoption of a special low-nitrogen combustion and air distribution technology, the production of NOx in the combustion process is greatly reduced, and the emission amount of NOx at an outlet of the boiler is smaller than 150 mg / Nm<3>.

Description

technical field [0001] The invention relates to the field of coal-fired industrial boilers, in particular to a low-nitrogen combustion system of a pulverized coal boiler, in particular to a micro-emission pulverized coal combustion system. Background technique [0002] my country's energy structure is dominated by coal, and pulverized coal boilers will be important thermal energy conversion equipment for a long time in the future. The nitrogen oxides generated during fuel combustion will seriously harm the ecological environment and are difficult to deal with. The flue gas emitted by the boiler is the main source of nitrogen oxides. Therefore, reducing the nitrogen oxides generated during the combustion process is one of the development directions of boiler combustion technology. . At present, many boiler equipment in my country have begun to use low-nitrogen combustion technology to control the formation of nitrogen oxides. Conventional pulverized coal low-nitrogen combust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C5/08F23C7/00
CPCF23C5/08F23C7/008F23C2700/063Y02E20/34
Inventor 林文亚王改苏为晃沈玉华刘东平吴星
Owner HANGZHOU JUNENG BOILER
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