高效过滤器容尘性能试验用人工尘与发尘方法探讨
摘要：采用KCl气溶胶与多种人工尘对高效过滤器进行容尘实验，结果显示，气溶胶因难以在可接受的时间内完成容尘实验，并不适合用于高效过滤器容尘性能试验。分别采用ISO A2尘与气相法白炭黑粉末，通过喂尘器串联旋风分离器的发尘方法进行容尘实验，结果表明气相法白炭黑+旋风分离器的发尘方法能够发生较为接近高效过滤器实际使用场合的人工尘颗粒，使高效过滤器在较小的容尘量下获得较快的阻力增长速度，有效缩短了实验时长，且容尘实验中几乎不存在管道落灰现象。实验方法具备较好的可操作性，适合用于高效过滤器容尘性能试验。
关键词：高效过滤器旋风分离器容尘性能试验尘源粒径分布
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[2] BSI.Particulate air filters for general ventilation:determination of the filtration performances:EN 779:2012[S].Brussels:European Committee for Standardization,2012.
[3] ISO.Air filters for general ventilation:part 3:determination of the gravimetric efficiency and the airflow resistance versus the mass of test dust captured:ISO 16890-3:2016[S].Switzerland:ISO Copyright Office,2016.
[4] 张昊.高效过滤材料容尘性能及其评价方法研究[D].上海：同济大学，2014:24- 26.
[5] 陈相玮.高效过滤材料容尘性能影响因素分析[D].上海：同济大学，2015:22- 27.
[6] 刘鸿洋，林忠平，张万毅，等.基于PTFE高效滤料结构的容尘性能研究[J].建筑热能通风空调，2016,35(4):35- 37.
[7] 赵晨煜，林忠平，张万毅，等.PTFE高效滤料的容尘性能优化研究[J].洁净与空调技术，2019(4):1- 5.
[8] 张万毅.负荷尘源特性对纤维滤料动态阻力性能的影响研究[D].上海：同济大学，2020:30.
[9] 中国建筑科学研究院有限公司，清华大学核能与新能源技术研究院，贺氏(苏州)特殊材料有限公司，等.高效空气过滤器：GB/T 13554—2020[S].北京：中国标准出版社，2020:20- 23.
[10] 中国制冷空调工业协会.空气过滤器：T/CRAA 430～432—2017[S].北京：中国标准出版社，2017:173.
[11] WANG Y X,LIN Z P,ZHANG W Y.Comparison of effects of particle charging,media characteristics,humidity and aerosols on loading performance of electret media[J].Building and environment,2020,179:106962.
[12] MONTGOMERY J F,GREEN S I,ROGAK S N.Impact of relative humidity on HVAC filters loaded with hygroscopic and non-hygroscopic particles[J].Aerosol science and technology,2015,49(5):322- 331.
[13] ALDERMAN S L,PARSONS M S,HOGANCAMP K U,et al.Evaluation of the effect of media velocity on filter efficiency and most penetrating particle size of nuclear grade high-efficiency particulate air filters[J].Journal of occupational and environmental hygiene,2008,5(11):713- 720.
[14] ISO.Road vehicles:test contaminants for filter evaluation:part 1:Arizona test dust:ISO 12103-1:2016[S].Switzerland:ISO Copyright Office,2016:1- 2.
[15] THOMAS D,CONTAL P,RENAUDIN V,et al.Modeling pressure drop in HEPA filters during dynamic filtration[J].Journal of aerosol science,1999,30(2):235- 246.
Discussion on artificial dust and dust generation methods for dust-loading test of high efficiency particulate air filters
Abstract: HEPA filters are challenged with KCl aerosol and a variety of artificial dust. The results show that the aerosol is not suitable for the HEPA filter dust-loading test because the experiment is difficult to complete in the acceptable time. ISO A2 dust and fumed silica powder are used respectively to carry out the dust-loading experiment by the dust generation method of the cyclone separator in series with the dust feeder. The results show that the dust generation method of fumed silica plus cyclone separator can produce artificial dust particles that are closer to the actual use of HEPA filter, so that the filter can obtain a faster resistance growth rate under a smaller dust capacity. The experimental time is effectively shortened, and there is almost no dust fall in the dust-loading experiment. The experimental method has good operability and is suitable for dust-loading test of HEPA filters.
Keywords: HEPA filter; cyclone separator; dust-loading test; dust source; particle size distribution;
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