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    汤渊, 潘伟童, 梁钦锋, 许建良, 代正华, 于广锁, 王辅臣. 管道内高温合成气喷雾激冷过程数值模拟研究[J]. 华东理工大学学报(自然科学版), 2021, 47(2): 154-162. DOI: 10.14135/j.cnki.1006-3080.20191207001
    引用本文: 汤渊, 潘伟童, 梁钦锋, 许建良, 代正华, 于广锁, 王辅臣. 管道内高温合成气喷雾激冷过程数值模拟研究[J]. 华东理工大学学报(自然科学版), 2021, 47(2): 154-162. DOI: 10.14135/j.cnki.1006-3080.20191207001
    TANG Yuan, PAN Weitong, LIANG Qinfeng, XU Jianliang, DAI Zhenghua, YU Guangsuo, WANG Fuchen. Numerical Simulation of Spray Shock Chilling Process of High Temperature Syngas in the Pipeline[J]. Journal of East China University of Science and Technology, 2021, 47(2): 154-162. DOI: 10.14135/j.cnki.1006-3080.20191207001
    Citation: TANG Yuan, PAN Weitong, LIANG Qinfeng, XU Jianliang, DAI Zhenghua, YU Guangsuo, WANG Fuchen. Numerical Simulation of Spray Shock Chilling Process of High Temperature Syngas in the Pipeline[J]. Journal of East China University of Science and Technology, 2021, 47(2): 154-162. DOI: 10.14135/j.cnki.1006-3080.20191207001

    管道内高温合成气喷雾激冷过程数值模拟研究

    Numerical Simulation of Spray Shock Chilling Process of High Temperature Syngas in the Pipeline

    • 摘要: 采用数值模拟方法对管道内高温合成气的喷雾激冷过程进行了研究,考察了喷嘴直径、喷嘴雾化半角和冷却水流量对管内合成气流动与降温过程的影响。结果表明:减小喷嘴直径、增大喷嘴雾化半角和冷却水流量有利于管内合成气降温。为使废热锅炉进口合成气(7472.99 m3/h)从1523.31 K降温至1273.15 K,采用冷却水流量为1.41 kg/s,喷嘴直径为6 mm,喷嘴雾化半角为70°的压力旋流喷嘴能达到预期的降温效果。

       

      Abstract: Spray cooling is a technology of increasing interest for the high heat flux application, featuring high heat transfer, rapid cooling, and less cooling water consumption. In this work, a numerical study was carried out on the process of cooling water spray shock chilled syngas in the pipeline. To determine the influences of different initial conditions on velocity field and temperature field in the pipeline, numerical studies were performed by varying the nozzle diameter, nozzle spray half angle, and the cooling water mass flow rate. Based on the Euler method, the gas phase flow field in the pipeline was calculated using realizable k-ε turbulence model. Based on the Lagrange method, the droplet trajectory was calculated using the stochastic trajectory model. And the interphase mass and heat transfer between the gas phase and the droplet were solved by the bidirectional coupling method. Simulation results showed that reducing the nozzle diameter, increasing the nozzle spray half angle, or increasing the cooling water flow could reduce the syngas temperature. By using a pressure swirling atomizing nozzle with the diameter of 6 mm and the spray half angle of 70°, the syngas(7472.99 m3/h) temperature could be reduced from 1523.31 K to 1273.15 K when the cooling water flow rate was 1.41 kg/s. Effective cooling of the syngas before the fire tube waste heat boiler is achievable and can be used for the optimization of the operation environment of waste boiler.

       

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