| 旋风-布袋复合除尘器优化和除尘效率的数值模拟 |
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| 引用本文： | 黄雅琴, 李彩亭, 李珊红, 张哲, 黄乐, 张智雄. 旋风-布袋复合除尘器优化和除尘效率的数值模拟[J]. 环境工程学报, 2020, 14(8): 2222-2231. doi: 10.12030/j.cjee.201911164 |
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| 作者姓名： | 黄雅琴 李彩亭 李珊红 张哲 黄乐 张智雄 |
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| 作者单位： | 1.湖南大学环境科学与工程学院，长沙 410082; 2.湖南大学，环境生物与控制教育部重点实验室，长沙 410082 |
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| 基金项目： | 国家重点研发计划(2016YFC0204100)；湖南省重点研发计划(2018SK2032，2018SK2033) |
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| 摘 要： | 针对燃煤工业锅炉烟尘超低排放的要求，采用数值模拟方法，研究了旋风除尘器(A)和内部滤袋前无导流板(B)、有导流板(C)或开孔挡板(D)的几种旋风-布袋复合除尘器的流场。结果表明：除尘器C的流场较均匀，较高风速时压降低于除尘器B、D。进一步模拟了除尘器A、C的分级效率，发现对于粒径低于15 μm的颗粒，除尘器A去除率低于60%，除尘器C去除率高于97.8%。且复合除尘器占地小，滤袋寿命长，具有广阔的应用前景。上述数值模拟结果可为复合除尘器的优化设计提供参考。
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| 关 键 词： | 复合除尘器 数值模拟 优化 除尘效率 |
| 收稿时间： | 2019-11-27 |
Optimization of cyclone-bag composite dust collector and numerical simulation of dust removal efficiency |
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| HUANG Yaqin, LI Caiting, LI Shanhong, ZHANG Zhe, HUANG Le, ZHANG Zhixiong. Optimization of cyclone-bag composite dust collector and numerical simulation of dust removal efficiency[J]. Chinese Journal of Environmental Engineering, 2020, 14(8): 2222-2231. doi: 10.12030/j.cjee.201911164 |
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| Authors: | HUANG Yaqin LI Caiting LI Shanhong ZHANG Zhe HUANG Le ZHANG Zhixiong |
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| Affiliation: | 1.College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; 2.Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China |
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| Abstract: | For the ultra-low emission of flue gas and dust from coal-fired industrial boilers, a numerical simulation method was used to study the flow fields of cyclone dust collector (A) and several kinds of cyclone-bag composite dust collectors without baffle (B), with baffle (C) or perforated baffle (D) in front of inner filter bag. The results showed that the flow field of cyclone-bag composite dust collector C was more uniform than others, and its pressure drop was lower than cyclone-bag composite dust collectors of B and D at a higher inlet velocity. The grading efficiencies of cyclone-bag composite dust collectors of A and C were further simulated, it was found that for particles smaller than 15 micrometers, the corresponding removal efficiency by cyclone-bag composite dust collector A was lower than 60%, while the corresponding removal efficiency by cyclone-bag composite dust collector C was higher than 97.8%. Moreover, with advantages of less space, lower filter bag load and longer cleaning cycle, the new composite dust collector has a broad application prospect. The results of above numerical simulation provide guidelines for the design and optimization of the composite dust collector. |
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| Keywords: | composite dust collector numerical simulation optimization dust removal efficiency |
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