High excess air coefficient and low nitrogen type integrated combustion device and method

Abstract

The invention relates to a high excess air coefficient and low nitrogen type integrated combustion device and method. The device comprises a combustion chamber, an air chamber, a fuel gas chamber, fuel gas spray pipes, distributed fuel gas spray guns and a cooling air channel, the air chamber and a buffer air chamber sleeve the combustion chamber, the buffer air chamber is internally provided withthe fuel gas chamber, and the periphery of the inner wall of the fuel gas chamber is axially connected with the multiple fuel gas spray pipes; ,a layer of cooling air channel is distributed on the wall of the combustion chamber, a plurality of sets of distributed air channels fixedly communicating with the combustion chamber are evenly distributed on the periphery of the outer wall of the coolingair channel, one distributed fuel gas spray gun is arranged in each distributed air channel, mixed fuel and air are evenly sprayed out of the distributed fuel gas spray guns, and the combustion chamber is uniformly filled with ignited flames. Through a combustor and the combustion chamber which are fused into an integrated structure, fuel and air are evenly mixed in a metal structure shell of thecombustion chamber, the completely premixed fuel and air are sprayed into the internal space of the combustion chamber through evenly-distributed combustion heads to be combusted, and flames with theeven temperature field are formed.

Description

technical field [0001] The invention relates to an integrated combustion device and method, in particular to a high excess air factor and low nitrogen type integrated combustion device and method suitable for heating furnace combustion equipment. Background technique [0002] The NOx of high calorific value gas burners is mainly thermal NOx and rapid NOx. The main factor affecting the formation of thermal NOx is combustion temperature, and the main factor affecting the formation of rapid NOx is the concentration of CH ion clusters. At present, high calorific value gas burners mainly reduce NOx by means of staged combustion and flue gas external circulation. The introduction of flue gas can reduce the flame temperature, reduce the concentration of CH ion groups, and can effectively reduce the amount of NOx produced. [0003] For some kiln processes, the flue gas often contains a lot of dust, and the smoke exhaust point is far away from the burner, so it is impossible to redu...

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Problems solved by technology

[0006] The conventional arrangement is that the burner is arranged at one end of the combustion chamber. After the burner is ignited, a column-like flame enters the combustion chamber, and the cooling air starts to mix and cool from the middle and lower reaches of the flame, resulting in a high temperature of the middle and upper reaches of the flame and NOx emissions. high value

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