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基于抽气循环的双层滤料颗粒床高温除尘器数值模拟
Numerical simulation of high temperature dual-layer granular bed filter based on pumping circulation
投稿时间:2017-12-06  
DOI:10.12030/j.cjee.201712034
中文关键词:  双层滤料颗粒床  抽气循环  DPM  两相流
英文关键词:dual-layer granular bed  pumping circulation  DPM  two-phase flow
基金项目:
作者单位E-mail
肖贵慧 宁波大学海运学院宁波 315211 1527896621@qq.com 
杨国华 宁波大学海运学院宁波 315211  
姚志伟 宁波大学海运学院宁波 315211  
万博臣 宁波大学海运学院宁波 315211  
徐青涛 宁波大学海运学院宁波 315211  
兰明勇 大庆油建公司大庆 163318  
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中文摘要:
      为解决双层滤料颗粒床高温除尘器床层粉尘进入率过高的问题,在沉降室底部,采用抽气循环抽出部分气体再引入除尘器入口进行循环以降低床层粉尘进入率。运用Fluent软件中的离散相模型(DPM)对除尘器的气固两相流场进行数值模拟。结果表明:抽气循环可以显著降低床层粉尘进入率,当循环率为1/7时,床层粉尘整体进入率从无循环的20.73%降低到5.13%,特别是第6床层粉尘进入率从10.21%降低到2.35%。因此,抽气循环可以有效降低床层粉尘进入率。
英文摘要:
      To overcome the problem of high dust entry rate of high temperature dual-layer granular bed filter, a part of gas is pumped from the bottom of the settling chamber by the pumping circulation system and then lead the gas into the inlet of the filter to reduce the bed dust entry rate. In this paper, the discrete phase model (DPM) in Fluent software is used to simulate the gas-solid flow field in the filter. The results show that the pumping circulation can significantly reduce the bed dust entry rate.The whole bed dust entry rate decreases to 5.13% from 20.73% without circulation, especially the sixth bed layer dust entry rate decreases from 10.21% to 2.35%. Therefore, the pumping circulation can effectively reduce the bed dust entry rate.
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