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Center-enriched fuel intensified ignition direct-current low-nitrogen burner capable of achieving deep peak regulation

A low-nitrogen burner and peak shaving technology, which is applied to burners, burners, combustion methods and other directions of burning powder fuel, can solve the problem that the burner cannot meet the operating requirements of low-load deep peak shaving, and achieve enhanced ignition. Stability, uniform ignition, effect of reducing temperature peaks

Active Publication Date: 2020-11-06
华电新疆哈密煤电开发有限公司 +1
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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 existing burner cannot meet the operating requirements of low-load deep peak regulation, and the present invention provides a center-enriched fuel-enhanced ignition direct-flow low-nitrogen burner capable of deep peak regulation

Method used

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  • Center-enriched fuel intensified ignition direct-current low-nitrogen burner capable of achieving deep peak regulation
  • Center-enriched fuel intensified ignition direct-current low-nitrogen burner capable of achieving deep peak regulation
  • Center-enriched fuel intensified ignition direct-current low-nitrogen burner capable of achieving deep peak regulation

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Experimental program
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Effect test

specific Embodiment approach 1

[0016] Embodiment 1: A center-enriched fuel-enhanced ignition direct-flow low-nitrogen burner capable of deep peak regulation, which includes a pulverized coal nozzle body 1, a concentrator 2, a dense coal dust flow collection chamber 4, and an enhanced ignition stabilizer 5 , light-phase pulverized coal nozzle 7, smoke entrainer 8 and perimeter wind nozzle 9;

[0017] The outlet end of the pulverized coal nozzle body 1 is connected to the inlet end of the light phase pulverized coal nozzle 7, and the peripheral air nozzle 9 is arranged outside the outlet end of the light phase pulverized coal nozzle 7 with gaps;

[0018] The concentrator 2 is arranged inside the pulverized coal nozzle body 1, and the outlet end of the concentrator 2 is connected with the inlet end of the dense pulverized coal flow collection chamber 4, and the dense pulverized coal flow collection chamber 4 is simultaneously arranged between the pulverized coal nozzle body 1 and the light phase In the inside ...

specific Embodiment approach 2

[0020] Embodiment 2: The shape of the concentrated pulverized coal flow collection chamber 4 is a conical shape gradually increasing from the inlet end to the outlet end.

[0021] Other specific implementations are the same as the first specific implementation.

specific Embodiment approach 3

[0022] Embodiment 3: A pulverized coal flow rectifying plate 3 is provided inside the inlet end of the dense pulverized coal flow collection chamber 4 .

[0023] Other specific implementations are the same as the first specific implementation.

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Abstract

The invention relates to the field of low-nitrogen burners, in particular to a center-enriched fuel intensified ignition direct-current low-nitrogen burner capable of achieving deep peak regulation. The burner aims to solve the problem that an existing burner cannot meet the operation requirement of low-load deep peak regulation. According to the burner, a venturi concentrator is arranged in a nozzle body of the burner, so that pulverized coal airflow entering the burner is concentrated to form the thick and thin pulverized coal airflow with thick center and thin periphery; the venturi concentrator is adopted, so that the airflow speed at an outlet is relatively uniform; a thick pulverized coal airflow collecting cavity is formed in the center of an outlet of the venturi concentrator, so that the thick pulverized coal airflow enters the thick pulverized coal airflow collecting cavity; the thick pulverized coal airflow uniformly flows in the cavity under the action of a pulverized coalairflow rectifying plate in the thick pulverized coal airflow collecting cavity; the thin pulverized coal airflow directly flows into a thin pulverized coal nozzle; and a temperature peak value of thelocal thick pulverized coal airflow is reduced, and the burning temperature is increased by 100 DEG C compared with the burning temperature of the same section of a conventional low-nitrogen burner.

Description

technical field [0001] The invention relates to the field of low-nitrogen burners, in particular to a center-enriched fuel-enhanced ignition direct-flow low-nitrogen burner capable of deep peak regulation. Background technique [0002] At present, domestic DC low-nitrogen burners are mainly divided into two types: thick-lean separation combustion and uniform combustion. The thick-thin combustion is divided into two types: horizontal thick-thin separation and vertical thick-thin separation combustion. Regardless of the above-mentioned combustion methods, they have been widely used in domestic units and have achieved good results. However, in the development in recent years, as the domestic deep peak shaving has higher and higher requirements for low-load operation, the above-mentioned burners can no longer meet the operation requirements of low-load deep peak shaving. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the ...

Claims

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Application Information

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IPC IPC(8): F23D1/00F23C9/06
CPCF23D1/00F23C9/06Y02E20/34
Inventor 王静杰于强徐彦辉宋欣闫燕飞殷亚宁祝令昆舒振杨夏良伟王小鹏
Owner 华电新疆哈密煤电开发有限公司