Full-premixing low-NOx burner with anti-explosion function
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A fully premixed and burner technology, which is applied in the direction of burners, gas fuel burners, combustion types, etc., can solve the problem of uneven mixing of gas and air, and achieve the effects of uniform air velocity distribution, increased flow velocity, and sufficient mixing
Active Publication Date: 2021-06-15
UNIV OF SCI & TECH OF CHINA
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[0005] The technical problem to be solved by the present invention is: to provide a fully premixed low NOx burner with explosion-proof function, to solve the problem of uneven mixing of gas and air in the existing fully premixed gas burner, and to effectively prevent the occurrence of backfire or even explosion And can effectively reduce NOx emissions
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[0025] The specific implementation of the air-gas mixing device for a fully premixed burner with an explosion-proof function of the present invention will be further described below in conjunction with the accompanying drawings.
[0026] Such as figure 1 As shown, the fully premixed low NOx burner with explosion-proof function of the present invention includes an air pipeline 1, a gas pipeline 2, a swirler 3, a mixing pipeline 4, a horizontal cooling pipe 5, a vertical cooling pipe 6, an outlet water header 7, an inlet Water header 8, grid plate 9, stable combustion pipe 10, diffusion hole 11 and air nozzle 12.
[0027] The gas pipeline 2 is set inside the air pipeline 1, and the central axis of the gas pipeline 2 coincides with the central axis of the air pipeline 1; the swirler 3 is fixed on the outer wall of the gas pipeline 2, and the swirler 3 is an axial blade type swirler , the blades are evenly distributed along the circumference of the pipeline and fixed, the number ...
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Abstract
The invention provides a full-premixing low-NOx burner with an anti-explosion function. The full-premixing low-NOx burner comprises an air pipeline, a gas pipeline, a swirler, a mixing pipeline, a transverse cooling pipe, a longitudinal cooling pipe, a water outlet collecting box, a water inlet collecting box, a grating plate, a combustion stabilizing pipe, a diffusion hole and a gas nozzle, the gas pipeline is arranged in the interior of the air pipeline in a sleeved mode, the swirler is fixed to the outer wall of the gas pipeline, the air pipeline is arranged on the outer side of the swirler, the diffusion hole is formed in the gas pipeline at the rear part of the swirler, the gas nozzle is mounted on the diffusion hole, the mixing pipeline is connected with the air pipeline, the water inlet collecting box and the water outlet collecting box are symmetrically arranged outside the mixing pipeline, and the transverse cooling pipe, the longitudinal cooling pipe, the grating plate and the combustion stabilizing pipe are sequentially arranged in the mixing pipeline and behind the gas pipeline at intervals. According to the full-premixing low-NOx burner with the anti-explosion function, the problem that gas and air are not evenly mixed in an existing full-premixing gas burner is solved, backfire and even explosion are effectively prevented, and NOx emission is reduced.
Description
technical field [0001] The invention belongs to the technical field of burners, and in particular relates to a fully premixed low NOx burner with an explosion-proof function. Background technique [0002] Natural gas is a high-quality clean energy. It does not produce solid emissions during the combustion process. The emission of sulfur dioxide is almost zero, and the emissions of carbon dioxide and nitrogen oxides (NOx) are far lower than those of coal and oil. In order to improve people's living environment, the government strongly encourages the development of natural gas energy projects and increases the proportion of natural gas in the primary energy consumption structure. [0003] At present, natural gas boilers generally adopt a partial premixed combustion method. The gas is only mixed with part of the air before combustion, and secondary air needs to be supplemented during combustion. The supply of secondary air makes it difficult to reduce the volume of the burner; ...
Claims
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