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热管式空气预热器为多根热管束所组成,每根热管是一根密闭管子,它内部充以液体传热介质和芯子(福斯特惠勒公司自制),管内壁加工成粗糙表面、管外壁焊上鳍片以加强热传导。热管式空气预热器上端放于加热介质(热源为烟气或加热火焰)处,下端放于被加热介质(冷端为空气)处,并将冷热介质加以隔离。整个热管式空气预热器是斜放的。管内液体介质受热源加热。取得热量后蒸发汽化。由于管内两端存在压差,从而使蒸汽沿着管内中间通道迅速转移到冷端凝结并将热量传导到管外被加热介质。被凝结的管内介质在毛细管作
The heat pipe air preheater is composed of a plurality of heat pipe bundles. Each heat pipe is a closed pipe, which is internally filled with a liquid heat-transfer medium and a core (manufactured by Foster Wheeler Co.), the inner wall of the pipe is processed into a rough surface, Fins welded to the outer wall to enhance heat conduction. Heat pipe air preheater placed at the top of the heating medium (heat source for the flue gas or heating flame) at the lower end of the heated medium (cold end of the air), and the heat medium to be isolated. The entire heat pipe air preheater is diagonal. The liquid medium inside the tube is heated by the heat source. Get heat and evaporated. Due to the pressure difference between the two ends of the tube, the steam is rapidly transferred to the cold end through the middle channel in the tube to condense and conduct heat to the heated medium outside the tube. Coated tube medium made in capillary