Heat-pipe-based heat exchange low-nitrogen gas burner

Abstract

The invention discloses a heat-pipe-based heat exchange low-nitrogen type gas burner. The burner comprises an air-fuel mixing section and a combustion head which are sequentially connected in a gas flow direction, wherein a gas nozzle is arranged in the air-fuel mixing section, the combustion head comprises a plurality of heat pipes arranged in a pipe bundle mode, a heat pipe evaporation heat absorption section in the pipe bundle is arranged to form a combustion gap as the combustion head, and a heat pipe condensation heat release section is provided with a condensing device and is arranged outside a furnace. According to the burner, the combustion head formed through intermittent arrangement of the plurality of heat pipes is arranged between the furnace and the air-fuel mixing section, two phase-change heat exchange processes of evaporation heat absorption and condensation heat release in a heat pipe heat transfer process have the advantages of good heat conductivity, isothermal property and the like, so that pipe inner working media in the heat pipes are evaporated into steam when the heat pipe evaporation heat absorption section absorbs heat of a combustion zone of the furnace,the condensation device of air cooling, water cooling and the like is adopted for condensation and heat releasing, liquid after the steam in the pipes is subjected to heat releasing and condensation flows back the heat absorption section under the action of gravity, and the damage caused to a boiler hydrodynamic cycle of a water-cooled combustor water cycle is effectively solved.

Description

technical field [0001] The invention relates to the technical field of thermal energy engineering, in particular to a low-nitrogen gas burner based on heat exchange with heat pipes. Background technique [0002] At present, fully premixed gas burners are widely used in condensing gas boilers on the market, while fully premixed gas burners are mainly metal fiber combustion head burners. This type of burner has high combustion heat intensity and forms a high-temperature combustion zone in the furnace. Lots of nitrogen oxides. In order to reduce the temperature of the combustion zone and reduce the emission of nitrogen oxides, the full premixed burner of the metal fiber combustion head type generally uses a high excess air ratio for combustion, that is, it cools the combustion zone by sending in a large amount of air that exceeds the combustion requirement. . However, the large amount of hot flue gas generated by combustion with a high excess air ratio increases the heat loss...

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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a combination of heat pipe technology and low-nitrogen combustion technology, which solves the damage caused by the water cycle of the water-cooled burner to the hydrodynamic cycle of the boiler, and completely inherits all the functions of the water-cooled burner. Advantages of low nitrogen gas burner based on heat pipe heat exchange

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