摘要
提出一种直接接触式烟气冷凝余热回收装置,该装置将低温喷淋水溶液与高温烟气进行逆流换热,回收燃气锅炉烟气的冷凝余热。以燃气壁挂炉作为烟气发生源搭建了实验台,研究了喷淋水温度、液气比、喷淋高度对该装置余热回收性能的影响。结果显示:当喷淋水温度为20℃、液气比为13、喷淋高度为1.26 m时,该装置能将排烟温度从102℃降至33℃,余热回收效率可达14%。
Proposes a direct contact flue gas condensing waste heat recovery device,which carries out countercurrent heat transfer between low-temperature spray aqueous solution and high-temperature flue gas to recover condensing waste heat from the flue gas of gas-fired boiler.Sets up an experimental bench using a wall-mounted gas-fired boiler as a flue gas source.Studies the influences of spray water temperature,liquid-gas ratio and spray height on the waste heat recovery performance of the device.The results show that when the spray water temperature is 20℃,the liquid-gas ratio is 13,and the spray height is 1.26 m,the device can decrease the smoke exhaust temperature from 102℃to 33℃,with the waste heat recovery efficiency up to 14%.
作者
张群力
张晓月
曹明凯
Zhang Qunli;Zhang Xiaoyue;Cao Mingkai(Beijing University of Civil Engineering and Architecture,Beijing,China;不详)
出处
《暖通空调》
2020年第6期124-128,共5页
Heating Ventilating & Air Conditioning
基金
北京市自然科学基金重点项目(编号:SQKZ201510016001)
“十三五”国家重点研发计划专项(编号:2017YFC0702200)。
关键词
燃气锅炉
冷凝余热回收
直接接触式换热
喷淋水温度
液气比
喷淋高度
节能
gas-fired boiler
condensing waste heat recovery
direct contact heat transfer
spray water temperature
liquid-gas ratio
spray height
energy saving
