Low-nitrogen combustor

Abstract

The invention discloses a low-nitrogen combustor which comprises a shell, an air pipeline and a fuel gas pipeline which are coaxially arranged, the fuel gas pipeline is a hollow cylindrical pipeline with the front end closed and the tail end in a boss shape, a central air flow channel is formed in the fuel gas pipeline, and a plurality of fuel gas spraying holes are formed in the circumferential face surrounding a boss. A fluid winding body is arranged in the fuel gas spraying hole; the gas pipeline is sleeved with the air pipeline, an air inlet is formed in the front end of the air pipeline, the tail end of the air pipeline is in a flaring shape, and a plurality of air spraying holes are formed around the flaring curved surface; and the air pipeline is sleeved with the shell, the front end of the shell is closed, and the tail end of the shell communicates with the flaring end of the air pipeline to form a combustion area. The invention provides the low-nitrogen combustor which adopts a mode of combining rotational flow and streaming, weakens the influence of a local high-temperature region, constructs a low-speed backflow region, ensures stable and sufficient combustion of fuel, and reduces the emission of nitrogen oxides.

Description

technical field [0001] The invention belongs to the technical field of gas combustion, in particular to a low-nitrogen burner. Background technique [0002] At present, the coal-to-gas conversion project is an important environmental protection project vigorously promoted by the government, which can greatly reduce the CO, SO and dust generated during the coal combustion process from the source. The fuel gas is mixed with air for combustion, and the oxygen in the air reacts with the hydrocarbons in the fuel gas to release a large amount of heat. However, when burning under the condition of high temperature and excess oxygen, nitrogen in the air will react with oxygen to form NO X , and under the same conditions, NO X The amount of formation increases with the increase of combustion temperature. NO X It is harmful to the environment, and its emissions are generally believed to be related to the reduction of ozone and other environmental problems. [0003] in NO X Before...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned technologies and to avoid the problems of large excess air coefficient, generation of incomplete combustion products and unstable combustion during gas combustion, and to promote a large amount of thermal NO X low nitrogen burner

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