摘要
覆油颗粒是有色金属加工业常见的污染物,主要采用过滤法进行去除。覆油颗粒的高黏特性使其在滤材表面形成大面积的液膜且容易板结,导致滤材阻力增长迅速,使用寿命短。本文对玻璃纤维滤材过滤覆油颗粒的性能进行了优化研究,采用浸渍法制备超亲油滤材,分析了原始滤材和超亲油滤材的运行压降、过滤效率等性能参数的变化规律及原因。结果发现:超亲油改性可以显著降低滤材过滤过程中压降的增长速率,其使用寿命比原始滤材提高了60.76%;同时,超亲油滤材对粒径段在0.3~0.5μm的小颗粒的过滤效率有约3%的小幅提高。通过观察滤材表面的形貌特征,阻力降低和效率提升的原因在于超亲油滤材对油具有很好的亲和力,油相快速输运到滤材的内部,在纤维上扩散并被吸收,抑制在滤材表面及内部形成液膜。本研究可降低有色金属加工行业中因过滤产生的能耗及减少因滤材频繁更换产生的人工成本。
Oil-coated particles are common pollutants in the non-ferrous metal processing industry,and are mainly removed using filtration methods.The high viscosity of oil-coated particles causes them to form a large liquid film on the surface of the filter material and easily harden,resulting in rapid increase in resistance and short service life of the filter material.This article conducts an optimization study on the filtration performance of oil-coated particles using glass fiber filter materials,and using impregnation method to prepare superoleophilic filter materials,analyses the changes in performance parameters such as operating pressure drop and filtration efficiency of the original filter material and the superoleophilic filter material,as well as the reasons for these changes.The results show that superoleophilic modification can significantly reduce the growth rate of pressure drop during the filtration process of the filter material,and its service life is increased by 60.76%compared to that of the original filter material.At the same time,the superoleophilic filter material has a small increase in filtration efficiency for small particles with a particle size range of 0.3-0.5μm by about 3%.By observing the morphology characteristics of the filter material surface,the reasons for the reduction in resistance and the improvement in efficiency are that the superoleophilic filter material has a good affinity for the oil,and the oil phase is quickly transported to the interior of the filter material,and diffused and absorbed on the fibers,inhibiting the formation of liquid films on the surface and inside of the filter material.This study is of great significance for reducing the energy consumption due to filtration and labor costs caused by frequent replacement of filter materials in the non-ferrous metal processing industry.
作者
杨洋
李思康
曹庆峰
王怡
陈虎
崔勇
王昕
陈海军
Yang Yang;Li Sikang;Cao Qingfeng;Wang Yi;Chen Hu;Cui Yong;Wang Xin;Chen Haijun(State Key Laboratory of Green Building,Xi’an;Xi’an University of Architecture and Technology,Xi’an;Siact Power Co.,Ltd.,Xi’an;University of Shanghai for Science and Technology,Shanghai;The Northwest Branch of China Construction Eighth Engineering Division Corp.Ltd.,Xi’an)
出处
《暖通空调》
2024年第12期25-30,共6页
Heating Ventilating & Air Conditioning
基金
陕西省自然科学基础研究计划项目“基于多场协同团聚原理的油固两相颗粒脱除增效技术”(编号:2024JC-YBMS-421)
国家自然科学基金面上项目“工业建筑通风系统介观涡流演化机理及调涡增效机制”(编号:52378110)。
关键词
覆油颗粒
玻璃纤维
超亲油
表面改性
降阻增效
oil-coated particle
glass fiber
superoleophilic
surface modification
resistance reduction and efficiency enhancement
