Multi-channel reverse injection type swirl single cone combustor and use method thereof

Abstract

The invention relates to a multi-channel reverse injection type swirl single cone combustor and a use method thereof. The combustor comprises a pulverized coal supply mechanism, a transition channel,a multi-stage air distribution assembly, diversion plates, a stable combustion cavity and a rectifying cavity; the multi-stage air distribution assembly comprises N air ducts, the N air duct is connected with the stable combustion cavity and the rectifying cavity in sequence to form a combustor body, the pulverized coal supply mechanism penetrates through the inner part of the combustor body,and the transition channel sleeves the pulverized coal supply mechanism; except for the N air duct, the other air ducts are of double-layer hollow structures, and one end of at least one diversionplate is inserted into the corresponding air duct; at least one direct current channel is formed between each diversion plate and the stable combustion cavity, flaring is formed in the other end of each diversion plate, and the angle of the flaring is the same as the angle of the stable combustion cavity. The combustor adopts the design of the multi-stage air distribution assembly, air is dividedinto N strands to enter the combustor body, and the turbulence intensity at the airflow boundary is strong, so that the air and powder mixing rate is strengthened, pulverized coal ignites stably, andhigh-efficiency and low-nitrogen combustion of the pulverized coal can also be guaranteed.

Description

technical field [0001] The invention relates to a pulverized coal burner, in particular to a multi-channel reverse jet swirl single-cone burner and its use method, belonging to the technical field of efficient 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 problems referred to above, one of the objects of the present invention is to provide a multi-channel reverse jet swirl single-cone burner with...

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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