陶瓷窑炉烟气余热回收利用高效热管换热器的实验研究

Experimental Study of the Efficient Heat Pipe Heat Exchanger for the Application of Ceramic Kiln Flue Gas Heat Recovery

设计加工用于余热回收的热管换热器,热管换热器由带肋片的重力热管组成。水为热管工质,管壳材料为碳钢。搭建热管换热器实验测试系统。研究了烟气体积流量、温度和空气体积流量对热管换热器传热量、火用效率、效能和热效率的影响。研究表明热管换热器换热效率较高,最高的换热效率超过75%;当烟气体积流量在60 m^3/h-160 m^3/h工况变化时,热管换热器传热量在3500 W-6000 W之间变化,火用效率变化范围为48%-62%;当烟气的入口温度从100℃升高到200℃时,热管换热器的效能在0.4-0.75之间变化。

Heat pipe heat exchanger which is used for waste heat recovery is manufactured. It is composed of some gravity heat pipes with fins. Water is the working medium of heat pipe and the shell material is carbon steel. An experimental test system of heat pipe heat exchanger is built. The effects of flue gas mass flow rate, temperature and air mass flow of the heat pipe heat exchanger on heat transfer rate, exergy efficiency and thermal efficiency are studied. It is indicated that heat pipe heat exchanger has a higher heat exchange efficiency, its maximum heat efficiency is more than 75%; The heat transfer rate of heat pipe heat exchanger falls between 3500W and 6000W; the exergy efficiency varies from 48% to 62%; it rises with the increase of the flue gas mass flow rate of; the effectiveness of the heat pipe heat exchanger falls between 0.4 and 0.75; it decreases with the rise of the flue gas mass flow rate.