NUMERICAL SIMULATION ON SPRAY EVAPORATION PROCESS FOR SMALL-SCALE QUENCH TOWER IN LIMITED SPACE

LI Wenjun; ZHENG Chenghang; WANG Yifan; ZHAO Zhongyang; LIU Chang; WU Weihong; LIU Shaojun

doi:10.13205/j.hjgc.202204008

Volume 40 Issue 4

Apr. 2022

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LI Wenjun, ZHENG Chenghang, WANG Yifan, ZHAO Zhongyang, LIU Chang, WU Weihong, LIU Shaojun. NUMERICAL SIMULATION ON SPRAY EVAPORATION PROCESS FOR SMALL-SCALE QUENCH TOWER IN LIMITED SPACE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(4): 50-56,78. doi: 10.13205/j.hjgc.202204008

Citation:

LI Wenjun, ZHENG Chenghang, WANG Yifan, ZHAO Zhongyang, LIU Chang, WU Weihong, LIU Shaojun. NUMERICAL SIMULATION ON SPRAY EVAPORATION PROCESS FOR SMALL-SCALE QUENCH TOWER IN LIMITED SPACE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(4): 50-56,78. doi: 10.13205/j.hjgc.202204008

Citation:

LI Wenjun, ZHENG Chenghang, WANG Yifan, ZHAO Zhongyang, LIU Chang, WU Weihong, LIU Shaojun. NUMERICAL SIMULATION ON SPRAY EVAPORATION PROCESS FOR SMALL-SCALE QUENCH TOWER IN LIMITED SPACE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(4): 50-56,78. doi: 10.13205/j.hjgc.202204008

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NUMERICAL SIMULATION ON SPRAY EVAPORATION PROCESS FOR SMALL-SCALE QUENCH TOWER IN LIMITED SPACE

doi: 10.13205/j.hjgc.202204008

National Environmental Protection Coal-fired Air Pollution Control Engineering Technology Center, State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Received Date: 2021-05-24
Available Online: 2022-07-06

Abstract

Abstract

Aiming at small-scale quench tower in limited space, the effect of operation parameters of spray nozzle on the evaporation process was studied by using computational fluid dynamics (CFD), such as atomization droplet size, jet relocity and spray angle. The results showed that with the increase of the droplet size, the evaporation time, axial and radial evaporation distance of the droplet increased accordingly, and the evaporation time increased by 293% when droplet size increased from 40 μm to 80 μm. When the jet velocity of droplet increased, the evaporation time, axial and radial evaporation distance of the droplet decreased, but the effect was weakened when the jet velocity increased to a certain value. The increase of spray angle caused the decrease of the evaporation time and axial evaporation distance of the droplet, but there was no obvious trend on the radial evaporation distance. The small atomizing droplet size nozzle below 70 μm could directly and effectively improve the operation safety. By comparison, it was found that a turbulence intensified area was formed in the upper part of the quench tower with volute inlet, and that led to better cooling characteristic and operational safety than quench tower with upper vertical inlet, when the space of quench tower was limited. The axial safety margin could be increased by 7% with a droplet size of 80 μm. The simulation results could provide optimal design scheme and operation guidance for engineering application of miniaturized quench tower.
- limited space,
- quench tower,
- volute inlet,
- evaporation characteristic,
- numerical simulation

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References(21)

References

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