Frameless detachment-free rotary air heater

Abstract

The invention discloses a frameless detachment-free rotary air heater, which consists of 3 to 8 groups of outer fin reinforced heat transfer tube bundles, wherein each group of heat transfer tube bundle has a frameless self-supporting structure consisting of spiral fin heat transfer tube bundles welded on a thin-walled inlet steam collecting tank and a thin-walled drainage collecting tank respectively, and the heat transfer tube bundles are averagely distributed in a primary air flue and a secondary air flue; any heat transfer tube bundle can rotate separately in a full angle of 360 degrees by adopting the self-supporting stable structure of the tube bundle so as to solve the problems that separate rotation of the heating surface of a certain stage cannot be realized, rotation in the full angle of 360 degrees cannot be realized, the heating surface cannot be rotated without cutting off steam, the operation part has complex structure and is not easily detached or maintained and ash blockage, leakage and fin deformation are caused; and the rotary air heater is frameless and detachment-free, can rotate in the full angle of 360 degrees, and is convenient to maintain.

Description

technical field [0001] The invention relates to a boiler heater for a power station, in particular to a frameless and disassembly-free rotary heater. device. Background technique [0002] The air heater is a necessary boiler auxiliary equipment for thermal power plants in northern my country. It is a heat exchange equipment for heating the cold air entering the air preheater. Large-scale power station boilers are divided into primary air heaters and secondary air heaters. Same principle. Thermal power plants generally use air heaters in winter to increase the temperature of the air entering the air preheater to prevent low-temperature corrosion caused by sulfuric acid condensation at the cold end of the air preheater, resulting in dust blocking on the heating surface of the cold end of the air preheater. In turn, it will cause adverse working conditions such as the increase of suction and air supply resistance, the decrease of heat exchange efficiency of air preheater and t...

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Problems solved by technology

[0007] In order to overcome the above-mentioned shortcomings in the prior art, the purpose of the present invention is to provide a frameless and disassembly-free rotary heater, which overcomes the inability to realize the individual rotation of a certain level of heating surface, and the inability to realize 360° full-angle rotation In operation, if the steam is not cut off, the heating surface cannot be rotated and the operating part has a complex structure, which is difficult to disassemble and maintain, and there are problems such as clogging, leakage, and fin deformation. It has no frame without disassembly, can be rotated at 360°, and is easy to maintain. The advantages

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