接触式烟气冷凝换热器的换热性能
Heat transfer performance of direct-contact flue-gas condensation heat exchanger
摘要：
通过求解烟气与水表面之间的热质交换基本方程，得出了烟气与水换热的解析解，并分析了接触式烟气与水处理过程热质交换性能的影响因素。结果表明，烟气与水换热效率的主要影响因素是水气比、换热器高度、喷水雾化粒径，而烟气流速的影响相对较小。搭建了锅炉烟气余热回收实验台，验证了理论计算结果的正确性。
关键词：烟气,冷凝,余热回收,直接接触,水气比,换热效率,实验
Abstract：
Based on the analytical solution of heat-mass transfer fundamental formula between flue-gas and water surface, analyses the key influencing factors on heat transfer efficiency of flue-gas and water. The results show that the main influencing factors are the water-gas ratio, height of heat exchanger and sprayed water droplet diameter. However, velocity of gas influences less. Sets up the performance test-bed for boiler flue-gas heat recovery, and verifies the results of theoretical calculation.
Keywords:flue-gas, condensation, heat recovery, direct-contact, water-gas ratio, heat transfer efficiency, experiment