Radiant tube combustor
A burner and radiant tube technology, which is applied in the field of gas radiant tube burners, can solve the problems of large emissions, difficult ignition of the burner, poor temperature uniformity on the wall surface, etc., and achieves reduction of NOx generation, simple structure, and low-oxygen combustion. Effect
Active Publication Date: 2014-11-05
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
[0005] In order to solve the above-mentioned problems, the object of the present invention is to solve the problem of difficulty in ignition, excessive combustion temperature, and NO x To deal with the problems of large emission and poor wall temperature uniformity, a simple ignition, low combustion temperature, and NO x Diffusion combustion self-preheating burner with small emission, good wall temperature uniformity, reasonable structure design and can be used for various radiant tubes
Method used
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0021] Such as Figure 1 to Figure 4 As shown, a radiant tube burner of the present invention includes a housing 2, an air passage pipe body 4, a gas passage pipe body 5, a flame stabilization chamber 6, an ignition gun 15 and a fixing flange 17, and the rear end of the housing 2 A gas inlet 1 is provided, and an air inlet 16 is provided at the lower end of the housing 2. One end of the air channel body 4 is fixedly connected to the front end of the housing 2, and is connected to the air inlet. 16 Unicom, the other end of the air channel body 4 is provided with a secondary air nozzle 7, the gas channel body 5 is fixed at the center of the front end of the housing 2, and the gas inlet 1 communicates with the gas channel body 5, the gas channel body 5 includes a rear cylindrical body 51 and a front cylindrical body 52, and the diameter of the re...
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The invention relates to a radiant tube combustor which comprises a shell, an air channel pipe, a fuel gas channel pipe, a flame stabilizing chamber, an ignition gun and a fixing flange. The fuel gas channel pipe is provided with a thrice fuel gas spray nozzle, the ignition gun is arranged above a primary fuel gas spray nozzle, a fuel gas channel is provided with the thrice fuel gas spray nozzle, an included angle is formed between the primary fuel gas spray nozzle and the central line of a radiant tube, a secondary fuel gas spray nozzle is composed of a plurality of spray nozzle bodies, and the thrice fuel gas spray nozzle is located in the top end of the fuel gas channel. A primary air spray nozzle and a secondary air spray nozzle are formed in an air channel. Part of fuel gas and part of air enter the flame stabilizing chamber through the primary fuel gas fuel gas spray nozzle and the primary air spray nozzle respectively, are ignited by the ignition gun and then sprayed out and are secondarily combusted with secondary air and secondary fuel gas, and the remaining fuel gas is sprayed out through the thrice fuel gas spray nozzle to conduct thrice combustion. According to the radiant tube combustor, the fuel gas is divided into three levels to form lean burn staged combustion, the secondary fuel gas spray nozzle is provided with a plurality of pores, the fuel gas is sprayed out from the pores, and the maximum temperature of combustion in the radiant tube is lowered; smoke in the radiant tube is mixed with the secondary air to lower oxygen concentration, low oxygen combustion is achieved, and emission of harmful gases such as NOx is reduced.
Description
technical field [0001] The invention belongs to the technical field of gas radiant tube heating, and relates to a gas radiant tube burner suitable for heat treatment under protective atmosphere. Background technique [0002] Gas radiant tube is a common heating method in metal heat treatment and other heating equipment that needs to use protective atmosphere. It has the advantages of high heat utilization rate of primary energy, large thermal power per unit surface area, and low operating cost. [0003] For gas radiant tube heating devices, due to the complexity of the gas combustion process, the mixed combustion of gas and air is difficult to control, and ignition is generally difficult. At the same time, the combustion is violently exothermic, and the flame temperature is high, so that the nitrogen-containing gas forms NO which will cause pollution under aerobic conditions. x The main forms are thermal type, fast type and gas type. For industrial common gas, due to the h...
Claims
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IPC IPC(8): F23D14/12F23D14/26F23D14/46
Inventor 冯俊小周闻华姜敏刘兴杰
Owner UNIV OF SCI & TECH BEIJING