Heat exchange performance testing system for heat storage elements of rotary air pre-heater

Abstract

The invention provides a heat exchange performance testing system for the heat storage elements of the rotary air pre-heater. The heat storage elements distributed on the peripheries of the evaporation section and the condensation section of the gravity assisted heat pipe are built by utilizing the characteristic that liquid in the gravity assisted heat pipe is influenced by temperature and moves towards the evaporation section and the condensation section, so that when the two sections of the gravity assisted heat pipe are influenced by different temperatures, circulation is formed inside the gravity assisted heat pipe and is ingeniously combined with the process of measuring the heat exchange performance of the heat storage elements, so that the temperature of the heat storage elements can be continuously absorbed by the gravity assisted heat pipe, and meanwhile, a heating section air duct and a cooling section air duct are arranged on the outer sides of the heat storage elements in a sealed mode and used for providing a cold air medium and a hot air medium for the corresponding condensation section and the corresponding evaporation section. The heat exchange performance condition of the heat storage element can be obtained according to the temperature difference value of the inlet and the outlet corresponding to the heating section air duct and the cooling section air duct; the air inlet of the heating section air duct and the air inlet of the cooling section air duct are oppositely arranged, and the heat exchange process of the heat storage element in the rotary air pre-heater can be truly reflected.

Description

technical field [0001] The invention relates to the technical field of operation optimization and energy-saving renovation of coal-fired thermal power units, and specifically relates to a heat transfer performance testing system and method for heat storage elements of a rotary air preheater. Background technique [0002] Due to its high heat transfer surface density, the rotary air preheater has a compact structure and a small footprint. Its volume is about one tenth of the tubular air preheater of the same capacity. The thickness of the tube of the rotary air preheater is 1.5mm, while the thickness of the heat storage plate of the rotary air preheater is 0.5 ~ 1.25mm, and the heat storage plate is very compact, so the metal consumption of the rotary air preheater is about the same capacity as the tube type One-third of the air preheater, and the flexible and convenient layout of the rotary air preheater makes it easy to get a reasonable layout plan for the boiler, so it is ...

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Problems solved by technology

[0004] Aiming at the problem that the existing experimental system for testing the performance of heat storage elements in the prior art does not extract the characteristics of reverse flow and regenerative heat exchange of the rotary air preheater, and the evaluation conclusion is not accurate and objective, the present invention provides a rotary air preheater System and method for testing heat transfer performance of heat storage element

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