A heat pipe air preheater

Abstract

The invention discloses a heat pipe air preheater which resolves the problems that the exhaust gas temperature of a heat pipe air preheater of a tube heating furnace in the existing petrochemical engineering and coal chemical industries cannot be regulated, and noncondensable gas produced in use of a heat pipe cannot be effectively exhausted. The heat pipe air preheater comprises a smoke pipe box, an air pipe box, assembled heat pipe sets, a condenser, a medium distributor and a control regulating valve system, wherein the assembled heat pipe sets are arranged in the smoke pipe box and the air pipe box, the condenser is arranged in the air pipe box, the control regulating valve system comprises a blowoff valve, a steam regulating valve, thermoelectric couples and a medium regulating valve, the blowoff valve is communicated with upper portions of the assembled heat pipe sets through a blowoff pipe, the steam regulating valve is communicated with the upper portion of the condenser through a blowoff pipe, the medium regulating valve is communicated with lower portions of the assembled heat pipe sets and the lower portion of the condenser, the steam regulating valve and the medium regulating valve are connected with the thermoelectric couples respectively, and the thermoelectric couples are arranged in the smoke pipe box.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to an air preheater for a tubular heating furnace in petrochemical and coal chemical industries. Background technique [0002] At present, the heat pipe air preheater used in the petrochemical and coal chemical pipe heating furnace is mainly a heat exchange unit composed of a single heat pipe. Generally, the heat pipe is installed in the pipe box, and the evaporation section of the heat pipe is installed on the flue gas side of the air preheater to absorb the heat of the flue gas and evaporate the working medium in the heat pipe. The condensing section of the heat pipe is installed on the air side of the air preheater to exchange the heat released by the condensation of the working medium in the heat pipe. [0003] Since the heat pipe air preheater is generally designed and manufactured according to the design load of the device, its heat load is basically constant. However, in ...

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Problems solved by technology

[0007] The present invention provides a new heat pipe air preheater to solve the problem that the exhaust gas temperature of the heat pipe air preheater of the existing petrochemical tubular heating furnace cannot be adjusted and the non-condensable gas generated by the heat pipe cannot be effectively discharged.

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