烟气与水冷凝换热影响因素实验研究
Experimental research on influence factors of direct-contact flue-gas-water condensation heat exchange
摘要：
搭建了基于吸收式热泵的直接接触式烟气余热回收实验系统，通过实验研究了水气比、喷嘴形式、喷嘴排数、过量空气系数、喷淋高度、喷水温度、排烟温度对直接接触式换热器性能的影响。测试了凝结水量和冷凝水的pH值，以及换热器烟气侧阻力。结果表明，影响烟气-水换热效率的主要因素是水气比、喷淋高度和喷水雾化粒径，排烟温度、喷水温度和过量空气系数对换热效率也有一定影响。整个余热回收系统的实验测试结果达到了设计要求。
Abstract：
Establishes a performance test-bed for direct-contact flue-gas heat recovery system based on absorption heat pump. Through experiments studies the influence of the ratio of water to gas, spray nozzle type, row number of spray nozzle, excess air coefficient, spraying height, water-spray temperature and flue-gas temperature on the performance of the direct-contact flue-gas condensation heat exchanger.Measures the amount of condensate water, pH value of condensate water and resistance in flue-gas side.The results show that the main factors of influencing the efficient of heat exchange between flue-gas and water are the ratio of water to gas,spraying height and sprayed water diameter, while the flue-gas temperature, water-spray temperature and excess air coefficient have less influence.The test results of the whole system attain design requirements.
Keywords:flue-gas condensation, waste heat recovery, direct-contact heat exchange, influence factor, heat exchange efficient, absorption heat pump, experimental research