Oxygen-enriched ignition and low-load stable combustion coal combustor

A technology of oxygen-enriched combustion and burners, which is applied in the direction of burners, burners, and combustion methods for burning powder fuels

Inactive Publication Date: 2012-04-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a burner with oxygen-enriched ignition and low-load stable combustion, which mainly solves the problems of ignition and low-load stable combustion of boilers burning inferior coal.

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  • Oxygen-enriched ignition and low-load stable combustion coal combustor

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Embodiment Construction

[0018] The present invention provides a burner with oxygen-enriched ignition and low-load stable combustion. The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] figure 1 , figure 2 It is a schematic diagram of the principle structure of the burner. In the figure, the diverging section 2 is arranged concentrically with the primary air pipe 1 and the burner body 3 respectively, and is connected by welding. The primary pulverized coal combustion chamber 6 is arranged concentrically with the burner body 3, the outlet of the primary pulverized coal combustion chamber is 1200mm-1600mm from the burner nozzle, the length of the primary pulverized coal combustion chamber is 750mm-800mm, and the rib plate 12 is connected to the burner body 3 Welding fixed. The imported pulverized coal concentration device 4 is arranged on the inner wall of the burner body 3 at an appropriate position before ...

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Abstract

The invention discloses a novel oxygen-enriched ignition and low-load stable combustion coal combustor which belongs to the field of parts of coal-fired boilers of heat power stations. An increasing section of the combustor, a coal dust concentration device, a primary coal dust combustion chamber, a secondary coal dust combustion chamber and a nozzle streamline concentration device are coaxially arranged on a combustor body; and a primary combustion chamber oxygen supply pipe, a gasified oil oxygen enrichment combustion cylinder, a flame check device, and a switchable oxygen enrichment gasified oil gun sleeve are all distributed on the same profile to reduce the flow resistance of coal dust, and avoid coal dust accumulation in a wake backflow area. By using an oxygen supply device, and the coal dust concentration device, high-coal-dust-concentration, high-oxygen-concentration and high-flame-temperature areas are formed twice by the gasified oil oxygen enrichment combustion cylinder in the combustor, and the heating and boosting requirements of blackfurnace starting ignition of low-quality coal of a coal-powder boiler can be met and low-load stable combustion can be realized by adjusting oxygen concentration, coal dust concentration, and oil gun output. The novel oxygen-enriched ignition and low-load stable combustion coal combustor can also adapt to multi-coal wide-range characteristics and has great economic and social benefits.

Description

technical field [0001] The invention belongs to the scope of coal-fired boilers in thermal power stations, and in particular relates to an oxygen-enriched ignition and low-load stable combustion pulverized coal burner, specifically a large-scale coal-fired power station pulverized coal boiler cooling designed for burning lean coal and anthracite coal boilers. A device for steady ignition and low-load stable combustion. Background technique [0002] my country's power structure is dominated by thermal power generating units. The start-up and low-load stable combustion of the units require a large amount of fuel consumption. In the field of ignition, plasma ignition and micro-oil ignition have been transformed into power plant boilers, but the boilers burning inferior coal have not yet been solved. . Boilers burning low-quality coal, on the one hand, consume a lot of fuel for ignition. A 200MW boiler consumes about 50-60 tons of oil each time it is started in a cold state, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D1/00F23L7/00
CPCY02E20/34
Inventor 王福珍刘石贾磊黄耀松白翔
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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