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Combustor capable of reducing soot emission and combustion method

A combustion method and burner technology, applied in the direction of combustion method, solid fuel combustion, combustion equipment, etc., can solve the problems that the burner cannot meet the actual application requirements, limit the energy utilization of biomass fuel, and lack of combustion technology, etc., to achieve Increase the effect of self-priming, increase strength, and improve combustion efficiency

Pending Publication Date: 2022-05-13
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because biomass fuels are rich in volatile inorganic components such as alkali metals, alkaline earth metals, and chlorine, and lack advanced combustion technologies, the combustion process is likely to cause serious pollutant emissions, which limits the large-scale energy utilization of biomass fuels.
[0003] At present, carbon smoke emission in the combustion of biomass fuel is always a major scientific and technological problem, and various burners cannot meet the actual application requirements.

Method used

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  • Combustor capable of reducing soot emission and combustion method
  • Combustor capable of reducing soot emission and combustion method
  • Combustor capable of reducing soot emission and combustion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a burner and a combustion method for reducing soot emissions, figure 1 It is a schematic structural view of the burner of the present invention, including the burner body 6 body, the side wall of the burner body 6 is connected with a feeding mechanism, and an additional speaker is arranged on the side wall of the burner body 6 and below the feeding mechanism 4. The middle part of the burner body 6 is provided with a slag cleaning mechanism, and the lower part of the burner body 6 is provided with an ash collecting bucket a1, which is located in the support frame b17, and the support frame b17 is used to fix and support the burner body 6. It is connected with the bottom of the burner main body 6 and is used to place the ash hopper a1. The top of the burner body 6 is provided with an exhaust and dust removal mechanism, which can ensure sufficient oxygen supply, and can also filter out ash flocs produced during the combustion process to reduce poll...

Embodiment 2

[0048] The burner of this embodiment is basically the same as that described in Embodiment 1, the only difference being that the metal rolling net 5 with a mesh number of 30 is used, and the frequency of the loudspeaker 4: the frequency of the loudspeaker 4 is set to 200 Hz, and the amplitude is 150 Pa. The feed rate of biomass fuel was 300 g / min.

[0049] Similar to Example 1, the soot rate produced during the steady state combustion of the flame in the original state of the burner was measured, and the NOx and CO contents in the flue gas were tested to be 100ppm and 9201ppm respectively. After the pulse combustion started, the soot generation rate at the tail was measured, and the measured NOx and CO contents in the flue gas were 16ppm and 465ppm. Among them, the suppression efficiency of soot is 98.8%, and the suppression efficiency of NOx and CO is 84% ​​and 95%.

Embodiment 3

[0051] The burner of this embodiment is basically the same as that described in Embodiment 1, the only difference being that the metal rolling net 5 with a mesh number of 10 is used, and the frequency of the loudspeaker 4: the frequency of the loudspeaker 4 is set to 80 Hz, and the amplitude is 100 Pa. The feed rate of biomass fuel was 200 g / min.

[0052] Similar to Example 1, the soot rate produced during the steady state combustion of the flame in the original state of the burner was measured, and the NOx and CO contents in the flue gas were tested to be 81ppm and 6250ppm respectively. After the pulse combustion started, the soot generation rate at the tail was measured, and the measured NOx and CO contents in the flue gas were 10ppm and 426ppm. Among them, the suppression efficiency of soot is 99%, and the suppression efficiency of NOx and CO is 87% and 93%.

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Abstract

The invention discloses a combustor capable of reducing soot emission and a combustion method.The combustor comprises a combustor body, a feeding mechanism arranged on the side wall of the combustor body, an exhaust dust removal mechanism connected with the upper portion of the combustor body and a slag removal mechanism arranged in the combustor body, and an ash collecting hopper a is arranged at the bottom of the combustor body; the slag removing mechanism comprises a metal rolling net supported on the inner side wall of the burner body through a rotary supporting rod, and loudspeakers are arranged on the two sides of the metal rolling net. Pulsating waves are generated through the loudspeaker, so that acoustics and flames are combined to accelerate mass transfer and heat transfer, the combustion efficiency is improved, emission of soot pollutants in the combustion process is effectively reduced, the combustor is provided with the metal rolling net, biomass fuel can be fully heated in the combustion process, the combustion efficiency is improved, accumulated ash is automatically removed, and the combustion efficiency is improved. And the continuous combustion process is ensured.

Description

technical field [0001] The invention relates to the technical field of combustion equipment and a combustion method, in particular to a burner and a combustion method for reducing soot emissions. Background technique [0002] Biomass fuel refers to the burning of biomass materials as fuel, generally mainly agricultural and forestry wastes (such as straw, sawdust, bagasse, rice bran, etc.). Biomass fuel is recognized as "CO 2 However, the combustion process of biomass fuels will cause serious air pollution problems. my country is a large agricultural country with abundant reserves of biomass agricultural and forestry waste. However, due to the fact that biomass fuels are rich in alkali metals, alkaline earth metals, chlorine, etc. Volatile inorganic components, coupled with the lack of advanced combustion technology, can easily cause serious pollutant emissions during the combustion process, which limits the large-scale energy utilization of biomass fuels. [0003] At presen...

Claims

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Application Information

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IPC IPC(8): F23B30/04F23B40/00F23B90/00F23J1/00F23J3/00F23J15/00F23J15/02
CPCF23B30/04F23B40/00F23B90/00F23J1/00F23J3/00F23J15/006F23J15/022F23B2900/00005
Inventor 张治国郭辉杨艳民索艳格吴敏乐
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY