Multi-channel dense-thin separation type single cone burner and using method thereof

Abstract

The invention relates to a multi-channel dense-thin separation type single cone burner and a using method thereof. The burner comprises a pulverized coal supply mechanism, a transition channel, a multi-stage air assembly, at least one deflector, a combustion stabilizing chamber and a rectifying chamber, wherein the multi-stage air assembly comprises N air ducts, the Nth air duct is connected withthe combustion stabilizing chamber and the rectifying chamber sequentially, the pulverized coal supply mechanism comprises an air and pulverized coal pipe and a reach-lean separator, the air and pulverized coal pipe communicates with the combustion stabilizing chamber, the reach-lean separator is detachably connected to the air and pulverized coal pipe, and the transition channel is arranged at aninterval in the first air duct; each air duct is of a double-layer hollow structure, and one end of at least one deflector is inserted into the corresponding air duct; and at least one direct flow channel is formed between each deflector and the combustion stabilizing chamber, a flare is formed at the other end of each deflector, and the angle of each flare is the same as that of the combustion stabilizing chamber. Air can be divided into N strands to enter a burner body, turbulence intensity at the airflow boundary is high, the mixing speed of air and pulverized coal is increased, the pulverized coal is stably ignited, and high-efficiency and low-nitrogen burning of the pulverized coal can also be ensured.

Description

technical field [0001] The invention relates to a pulverized coal burner, in particular to a multi-channel thick-thin separation type single-cone burner and its use method, belonging to the technical field of high-efficiency and clean utilization of coal. Background technique [0002] At present, in the field of pulverized coal industrial boilers, a variety of burners such as blunt body burners, swirl burners, and reverse injection burners have appeared. The purpose of high-efficiency and low-nitrogen combustion of pulverized coal. However, the load adjustment range of pulverized coal burners is narrow, and the adaptability of coal types is poor; moreover, pulverized coal industrial boilers still have the problem of high nitrogen oxides compared with chain furnaces and circulating fluidized beds. Contents of the invention [0003] In view of the above problems, one of the objectives of the present invention is to provide a multi-channel rich-lean separation type single-co...

AI Technical Summary

Problems solved by technology

However, the load adjustment range of the pulverized coal burner is narrow, and the adaptability of the coal type is poor; and compared with the chain furnace and circulating fluidized bed, the pulverized coal industrial boiler still has the problem of high nitrogen oxides

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