CAO Yu, WANG Le, JI Chao, HUANG Yanzhao, XUE Zhilei, LU Jianming, QI Hong. Pilot-scale application on dissipation of smoke plume from flue gas using ceramic membrane condensers[J]. CIESC Journal, 2019, 70(6): 2192-2201
CAO Yu, WANG Le, JI Chao, HUANG Yanzhao, XUE Zhilei, LU Jianming, QI Hong. Pilot-scale application on dissipation of smoke plume from flue gas using ceramic membrane condensers[J]. CIESC Journal, 2019, 70(6): 2192-2201DOI: 10.11949/0438-1157.20181500.
Pilot-scale application on dissipation of smoke plume from flue gas using ceramic membrane condensers
The tubular ceramic outer membrane with average pore diameters of 5
20 and 50 nm was made into a membrane condenser
and a membrane condensation pilot test device with a membrane area of 0.3 m
2
was set up to carry out t
he recovery of water and waste heat resource from flue gas using ceramic membrane condensers. The recovery performance of two-stage membrane condensers with different installation types was investigated. The effects of relative humidity of inlet gas
inlet gas temperature
inlet gas velocity and average pore size of membranes on mass and heat transfer performances were systematically studied. The results showed that the higher flux and recovery ratio can be achieved when the gas and water flowed within the membrane condenser in a tandem way. The water flux increased with the increasing of relative humidity
temperature and velocity of the inlet gas. The water recovery ratio can be enhanced by increasing relative humidity
temperature of the inlet gas and decreasing gas velocity. In addition
a three-stage condenser installed with 50 nm pore-sized ceramic membranes displayed a better water and heat recovery performances. The average pore size of ceramic membranes had remarkable impact on the mass transfer process rather than the heat transfer process. In this work
the highest water flux and recovery ratio of three-stage membrane condensers were 38.5 kg·m
–2
·h
–1
and 50.6%
respectively. Compared with conventional heat exchangers
ceramic membrane condensers can recover water and heat simultaneously
during which the overall heat transfer coefficient could reach as high as 415 W·m
–2
·℃
–1
. The ceramic membrane condensers can not only effectively relieve the visible pollution known as “smoke plume”
but also have great potential applications in the resources recycling and environmental protection.
关键词
Keywords
references
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