Low-NOx combustor suitable for various low-heat-value/low-pressure fuel gases
A low pressure, low calorific value technology, used in gas fuel burners, burners, combustion types, etc., can solve the problem of less research on NOx emission technology, and achieve the effect of flame stability and increased strength
Pending Publication Date: 2016-04-06
SHANGHAI WISEBOND TECH
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Problems solved by technology
In China, there are few researches on the technology of reducing NOx emission of this type of burner, and there are few reports in the world.
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[0011] The embodiments of the present invention will be further described below with reference to the accompanying drawings, the purpose of which is to enable those skilled in the art to understand and implement the present invention, not to limit the present invention. It should be understood that the protection scope of the present invention shall be determined by the claims, and any structure similar to the present invention or an equivalent replacement shall be included in the protection scope of the present invention. The following commas all represent the relationship between and.
[0012] figure 1 It is a longitudinal sectional structure schematic diagram of the industrial gas low NOx burner of the present invention; figure 2 yes figure 1 A schematic diagram of the structure. Depend on figure 1 and figure 2 As can be seen, the present invention is a low NOx burner suitable for various low calorific value / low pressure gases, including a central air duct 13, a gas ...
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The invention belongs to the technical field of industrial combustors, and discloses a low-NOx combustor suitable for various low-heat-value / low-pressure fuel gases for solving the technical problem about how to further reduce the NOx emission of combustors. The low-NOx combustor is characterized in that a center air pipe, an inner pipe, an outer pipe, an outer sleeve and a throat are sequentially and coaxially arranged from inside to outside; a first combustion air channel is formed between the center air pipe and the inner pipe, and the upper end of the first combustion air channel is fixedly connected with a first swirler; a fuel gas channel is formed between the inner pipe and the outer pipe, and the upper end of the fuel gas channel is provided with a plurality of inward center fuel gas nozzles and a plurality of outward center fuel gas nozzles in a circular-ring uniform distribution manner; a second combustion air channel is formed between the outer pipe and the outer sleeve, and the end of the second combustion air channel is fixedly connected with a second swirler; and a third combustion air channel is formed between the outer sleeve and the throat. By the combination of a dense-dilute combustion method and a staged combustion manner, flames can be relatively stable, the intensity of dense combustion is improved, and an extremely strong reduction atmosphere is formed for restraining NOx generation. The low-NOx combustor is suitable for various low-heat-value / low-pressure fuel gases.
Description
technical field [0001] The invention relates to industrial tail gas and waste gas combustion technology, in particular to a boiler and a heating furnace for burning industrial tail gas and waste gas with low calorific value / low air supply pressure, and belongs to the technical field of industrial gas burner combustion. Background technique [0002] With the deepening of national energy conservation and emission reduction policies, and people's awareness of the formation of NOx and its hazards, it is imperative to reduce NOx emissions. The fields involved are not limited to northern heating, industrial boilers, and power plants. The denitrification of boilers is aimed at the requirements of reducing NOx emissions to industrial waste gas and industrial by-product gas. These industrial waste gases generally have the characteristics of low gas supply pressure, low calorific value, and high nitrogen content. When burning these industrial waste gases, the NOx produced is not only...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F23D14/24F23D14/58
CPCF23D14/24F23D14/58F23D2900/14002
Inventor 陈宝明岳小俊徐志斌田莉勤
Owner SHANGHAI WISEBOND TECH