| 摘要: |
| 针对天然气工业特点,设计了一套滤芯性能在线检测装置，采用光学粒子计数器0PC对过滤器上、下游粉尘的浓 度和粒径分布进行适时测量。使用多分散性粉尘,在实验室内测试了天然气用纤维过滤器的非稳态性能,以及各种操 作参数对其性能的影响规律。实验结果表明，纤维过滤器的过滤效率和阻力均随粉尘负荷的增加而增加，根据其变化 趋势可分为深层过滤和滤饼过滤两个阶段。过滤速度过高容易导致大粒子穿透，从而使效率下降，纤维过滤器的表观 过滤速度应低于0.06 m/s;相对湿度和滤材厚度的增加有利于增大过滤效率,但也会导致阻力的迅速增加。 |
| 关键词: 纤维过滤器 天然气 过滤效率 压降 光学粒子计数器 |
| DOI： |
| 分类号: |
| 基金项目:中石油中青年创新基金项目(03E7013) |
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| Experimental study of dynamic filtration performance of natural gas fibrous filter |
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CHI Hua-chang1,JI Zhong-li1,WEI Rong-fang2
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(1. Faculty of Mechanical and Electronic Engineering in China University of Petroleum, Beijing 102249, China;2. China Petroleum Pipeline Natural Gas Compress Technology Limited Corporation, Dezhou 253020，Shandong Province, China)
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| Abstract: |
| An on-line natural gas filter element testing unit was built up，and an optical particle counter was used to simultaneously measure the upstream and downstream aerosol of the filter. The dynamic performance during fibrous filter clogging and the effect of various parameters on filtration performance were investigated using polydisperse ashes. The results show that the filtration efficiency increases with dust loading，which can be described in two stages，depth filtration and cake filtra-tion ,just being like pressure drop. The leakage of big particles should be responsible for the poor efficiency at high filtration velocity and the optimal face velocity ought to be smaller than 0. 06 m/s. Filtration efficiency can be improved by selecting thick filter media and increasing relative humidity，but the resistance will also increase. |
| Key words: fibrous filter natural gas filtration efficiency pressure drop optical particle counter |
