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Two-stage-adjustable steam plasma swirl burner

A technology of swirl burner and plasma, which is applied in the direction of burner, burner, combustion type, etc. for burning powder fuel, can solve the problem of excessive NOx generation, achieve strong industrial practicability, rational use of resources, and solve the problem of combustion Difficult to stabilize effect

Active Publication Date: 2016-06-15
HUAZHONG UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

In most of the above-mentioned patents, although the combustion stability has been improved, the NO x Generate more

Method used

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  • Two-stage-adjustable steam plasma swirl burner
  • Two-stage-adjustable steam plasma swirl burner
  • Two-stage-adjustable steam plasma swirl burner

Examples

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Embodiment 1

[0032] Keep the powder feed rate of the powder feeder at 15kg / h, and the total air volume at 134.8kg / h, of which the primary air volume accounts for 15% of the total air volume, and the external secondary air volume accounts for 52% of the total air volume. For the plasma generator, the jet gas temperature and air volume of the plasma generator meet the experimental requirements by controlling the power and air intake of the plasma generator. The adjustable range of the first-stage plasma air volume is 0-30% of the primary air volume, that is, 0-4.5% of the total air volume. By adjusting the water vapor control valve, the water vapor content in the first-stage plasma air can be changed from 0 to 100%, the temperature is controlled at about 4500K; the adjustable range of the second-stage plasma air volume is 0-10% of the primary air, and the temperature is controlled at about 1500K; the rest of the air volume is controlled as the internal secondary air, the horizontal furnace T...

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Abstract

The invention discloses a two-stage-adjustable steam plasma swirl burner. The two-stage-adjustable steam plasma swirl burner comprises a first-stage plasma ignition device, a second-stage plasma adjuster and a steam supply system. The first-stage plasma ignition device comprises a primary air pipeline, an internal combustor, a rich-lean separator, a swirl generator, a first-stage steam inlet pipeline, a central air pipeline and a first-stage plasma generator. The second-stage plasma adjusting device comprises a second-stage steam inlet pipeline, a second-stage plasma generator, an internal secondary air inlet pipeline and an external secondary air inlet pipeline. The two-stage-adjustable steam plasma swirl burner solves the problems that combustion is hardly stable and the NOx pollutant emission is high, is especially suitable for meager coal, smoke-free coal and the coal which is difficult to ignite and generates a large amount of NOx pollutants and has the effects of being low in nitrogen and stable in combustion.

Description

technical field [0001] The invention belongs to the field of coal-fired boilers, and more specifically relates to a swirl burner. Background technique [0002] At present, during the start-up and low-load stable combustion of power plant boilers, a large amount of fuel oil needs to be consumed. Plasma-assisted ignition technology can solve the ignition and stable combustion problems of high-volatile coal types and save the cost of fuel oil. Existing literature and industrial practice have shown that for low-volatile coal, plasma ignition technology is difficult to ignite, which makes it difficult to widely use plasma ignition technology in hard-to-combustible coals such as anthracite. At the same time, air is used as the reaction gas. N 2 It is easily oxidized to nitrogen oxides (NO x ), adding NO x The generated amount is not conducive to the low nitrogen emission reduction of the boiler. In the arc plasma in the patent CN201010577320, pure oxygen is used, although pure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D1/02F23L7/00
CPCF23D1/02F23L7/005
Inventor 向军周敬唐浩胡松苏胜汪一熊哲逯朝锋江龙徐俊
Owner HUAZHONG UNIV OF SCI & TECH
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