A low-nitrogen gas burner based on heat pipe heat exchange

Abstract

The present invention is a low-nitrogen gas burner based on heat pipe heat exchange, which includes an air-fuel mixing section and a combustion head sequentially connected along the gas flow direction; a gas nozzle is arranged in the air-fuel mixing section; the combustion head includes several The heat pipes are arranged in a tube bundle. The evaporation heat absorption section of the heat pipe in the tube bundle is arranged to form a combustion gap as a combustion head, and the condensation heat release section of the heat pipe is provided with a condensing device and arranged outside the furnace. In the present invention, the combustion head consisting of several heat pipes arranged intermittently is arranged between the furnace and the air-fuel mixing section, and the two phase-change heat processes of evaporation heat absorption and condensation heat release in the heat transfer process of the heat pipes have good thermal conductivity and isothermal properties and other advantages, so that the working fluid in the tube of the heat pipe absorbs the heat of the combustion zone of the furnace in the heat pipe evaporation heat absorption section and evaporates into steam, and condenses and releases heat by using a condensing device such as air cooling or water cooling, and the liquid in the tube after the steam releases heat and condenses flows back to the suction through gravity. The hot section effectively solves the damage caused by the water circulation of the water-cooled burner to the boiler hydrodynamic circulation.

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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