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Low emission high-power staged-combustion gas burner and gas collocation method thereof

A gas burner, segmented combustion technology, applied in the direction of combustion method, gas fuel burner, burner, etc., to achieve the effect of stable combustion, not easy to defire, and suppress the formation of NOx

Active Publication Date: 2012-12-12
SHANGHAI NUOTE FEIBO COMBUSTION EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

and also produce large amounts of NOx

Method used

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  • Low emission high-power staged-combustion gas burner and gas collocation method thereof
  • Low emission high-power staged-combustion gas burner and gas collocation method thereof
  • Low emission high-power staged-combustion gas burner and gas collocation method thereof

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Embodiment Construction

[0018] Such as figure 1 As shown in the schematic diagram of the structure of the throat part of the burner body of the present invention, a low-emission high-power staged combustion gas burner includes a burner body, a swirl 6 and a flame stabilization plate 5, and is characterized in that: the burner body In the throat 1 of the throat, a swirler 6, a flame stabilizing disc 5, a central tube 3 and an intermediate pipe 4 are arranged sequentially and coaxially from the outside to the inside, and the inner ring 14 of the swirler and the flame stabilizing disc 5 The outer periphery is connected, and the inner periphery of the flame-stabilizing disc 5 is connected to the outer surface of the central cylinder 3. The isometric lines on the flame-stabilizing disc 5 are evenly distributed and axially fixedly equipped with gas guns 2, and the gas guns 2 are placed between them. There are small gas holes A 10, and the gas gun 2 is radially provided with small gas holes B 15 staggered u...

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Abstract

The invention belongs to the technical field of industrial gas burner and relates to a low emission high-power staged-combustion gas burner. The staged-combustion gas burner is characterized in that a swirling machine, a flame stabilizing plate, a central canister and a middle pipe are coaxially arranged in the throat of the burner main body from outer to inner, wherein the flame stabilizing plate is provided with a gas gun which is axially fixed and has same uniformly distributed radial lines. The gas collocation method comprises the following steps: (1) collocating no gas in a direct air channel, in which is low-speed central cooling air, (2) mixing the high-speed swirling air entered from a swirling air channel with the gas jetted from a small gas hole B on the gas gun along the radialdirection till reaching to the semi-premixed state before emerging from the throat of the gas burner, and (3) face-to-face jetting the gas from a big gas hole on the top of the gas gun, the high-speed swirling air and the high-speed peripheral axial air flow so as to form non-premixing diffusion combustion. Because of the air, the staged gas branch supply, the premixing combustion and the non-premixing diffusion combustion, the combustion is uniform and NOx is prevented from being generated. The discharge amount of NOx of the gas burner is 70% lower than that of the common burner in the priorart.

Description

technical field [0001] The invention relates to the technical field of high-power industrial gas burners, in particular to a low-emission high-power gas burner with low NOx emissions and stable combustion, which is semi-premixed with air and staged combustion, and a gas configuration method thereof. Background technique [0002] Gas fuels are hydrocarbons, and now most burners, especially those with a single unit of high power (14MW) or more, use diffusion combustion (that is, fuel is not mixed with combustion-supporting air before combustion). In my country, the research and development of burners with a single unit power above 24MW is still in an incomplete stage. The local temperature inside the diffusion combustion flame is quite high, and the air distribution is not uniform. In this case, the hydrocarbons will decompose, produce solid carbon black, and even form black smoke, which will reduce the combustion efficiency. The greater the power of the burner, the more seri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D14/26
Inventor 肖江东徐志斌
Owner SHANGHAI NUOTE FEIBO COMBUSTION EQUIP CO LTD
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