基于固体吸湿循环的烟气余热回收系统实验研究
Experimental study on performance of flue gas waste heat recovery system based on solid sorption cycle
摘要：
为了充分回收燃气锅炉烟气余热，提出了基于固体吸湿循环的烟气余热回收系统。通过搭建一体化实验台，对系统的热回收效率进行了分析。实验结果表明，该系统可以将烟气温度降至20 ℃左右，余热回收效率可达到87%~94%。经过间壁式换热器的烟气与热网水温差可以保持在2 ℃以内，相对湿度接近100%；转轮的热回收性能主要受转速的影响，当转速大于8 r/min时，热回收效率变化趋于平缓，较优工况下转轮的全热回收效率可以达到80%左右。
Abstract：
In order to fully reclaim the flue gas waste heat of a gas boiler, presents a gas waste heat recovery system based on solid sorption cycle. Establishes an integrated experimental bench, and analyses the heat recovery efficiency of the system. Experimental results show that the flue gas temperature can be reduced to about 20 ℃, and the thermal recovery efficiency of the system can reach 87% to 94%. The temperature difference between network water and the flue gas by wall-type heat exchanger can keep within 2 ℃, and the relative humidity is close to 100%. The heat recovery performance of the rotary heat exchanger is mainly affected by the speed. When the speed is higher than 8 r/min, the heat recovery efficiency tends to be gradually steady and can reach about 80% in the optimal working condition.
Keywords:flue gas, waste heat recovery, solid sorption cycle, heat recovery performance, wall-type heat exchanger