一种新型高效余热回收的节能设备——CRH型插入件管式换热器,在江都研制成功,并在多家单位投入正式运行,并取得了较高的社会经济效益。该装置是由冷气入口均流箱、下联箱、热气出口集流箱及受热面管束等组成。当炉子排烟温度为700～900℃时,使用它可将冷气体预热到450～600℃,比一般钢管式换热器的综合传热系数要高25～35％,管壁温度 A new energy-efficient equipment for efficient recovery of waste heat - CRH-type insert tube heat exchanger, was successfully developed in Jiangdu and put into operation in a number of units, and achieved high social and economic benefits. The device is composed of an air-conditioned inlet box, a lower box, a hot-air outlet header box and a heated surface tube bundle. When the furnace exhaust temperature is 700 ~ 900 ℃, it can preheat cold gas to 450 ~ 600 ℃, which is 25 ~ 35% higher than the general heat transfer coefficient of steel tube heat exchanger. The wall temperature