Metal surface combustor and gas premixing method thereof

Abstract

The invention discloses a metal surface combustor and a gas premixing method thereof, solves the technical problem that the combustor can uniformly mix gas with combustion air in a shorter premixing channel, and belongs to the technical field of combustion of metal surface combustors. The metal surface combustor is characterized in that a metal throat is a cylindrical channel; the outer side surface is connected with a boiler front wall; one part extending into a hearth is an end-sealed microhole metal cylinder; the other end is connected with an air pipe as a whole; multiple gas spray guns and multiple cyclone blades are arranged at the tail end of the gas pipe in sequence; the gas uniformly enters the throat by spray holes in the gas spray guns and gas pipe holes in the gas pipes; meanwhile, the combustion air and the gas are hedged and uniformly mixed in the throat; and under stirring of the cyclone blades at the end part of the gas pipe, the uniform mixing is further accelerated, so that the mixing distance is shortened, the flame temperature nonuniformity caused by nonuniform gas mixing is effectively prevented, and the NOx emission is reduced.

Description

technical field [0001] The invention relates to a gas premixed low NOx burner and a gas premix method thereof, in particular to a metal surface burner suitable for use in small furnaces such as fire tube boilers, belonging to the technical field of burners. Background technique [0002] Entering the winter of 2015, domestic smog has entered a period of high incidence, especially in major cities in the north such as Beijing, Tianjin, Zhengzhou, Harbin and so on. Recently, the Chinese Academy of Social Sciences released a research report that the main source of smog in the above-mentioned cities is urban heating, especially coal-fired heating. However, Beijing and other regions have implemented coal-to-gas conversion, so why is there still a high incidence of smog? The reason is that, in addition to urban vehicle exhaust, NOx emissions from gas boilers are also the chief culprit of smog. ——This point has gradually been recognized by people, and the Beijing Municipal Environm...

AI Technical Summary

Problems solved by technology

However, due to the short mixing section of this type of burner on the market, it is difficult to mix evenly in a very short time. If the mixing is not uniform, local high temperature is prone to occur, resulting in high NOx emissions

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