双层滤料颗粒床与金属纤维毡梯级过滤特性
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摘要
为了提高双层滤料颗粒床对亚微米粉尘的过滤效率,进行了双层滤料颗粒床与金属纤维毡梯级过滤实验研究。结果表明:不加金属纤维毡的双层滤料颗粒床的过滤效率为96.35%、出口粉尘浓度为85.5 mg?m~(-3)、总压降为1 840 Pa;加金属纤维毡时,双层滤料颗粒床与金属纤维毡梯级过滤的总过滤效率为99.13%、出口粉尘浓度为19.8 mg?m~(-3)、总压降为1 730 Pa。双层滤料颗粒床与金属纤维毡梯级过滤大幅度地降低了出口粉尘浓度;并且由于金属纤维毡替代了稳流层,还降低了总压降。
To improve the filtration efficiency of sub-micron dust by the dual-layer granular bed, the cascade filtration experiments has been conducted with a dual-layer granular bed combined with metal fiber felt. The result shows that the filtration efficiency of the dual-layer granular bed without the metal fiber felt was 96.35%,the outlet dust concentration was 85.5 mg?m~(-3) and the total pressure drop was 1 840 Pa. However, the overall filtration efficiency of the dual-layer granular bed combined with the metal fiber felt was 99.13%, the outlet dust concentration was 19.8 mg ? m~(-3) and the total pressure drop was 1 730 Pa. The outlet dust concentration decreased greatly under the cascaded filtration by the dual-layer granular bed combined with the metal fiber felt and the total pressure drop was reduced by replacing the flow-stabilizing layer with the metal fiber felt.
To improve the filtration efficiency of sub-micron dust by the dual-layer granular bed, the cascade filtration experiments has been conducted with a dual-layer granular bed combined with metal fiber felt. The result shows that the filtration efficiency of the dual-layer granular bed without the metal fiber felt was 96.35%,the outlet dust concentration was 85.5 mg?m~(-3) and the total pressure drop was 1 840 Pa. However, the overall filtration efficiency of the dual-layer granular bed combined with the metal fiber felt was 99.13%, the outlet dust concentration was 19.8 mg ? m~(-3) and the total pressure drop was 1 730 Pa. The outlet dust concentration decreased greatly under the cascaded filtration by the dual-layer granular bed combined with the metal fiber felt and the total pressure drop was reduced by replacing the flow-stabilizing layer with the metal fiber felt.
引文
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[3]SI H,LI Y,ZHANG H,et al.Study on a separation technology for more efficient utilization of pulverized coals in cement plants[J].Fuel Processing Technology,2010,91(10):1261-1266.
[4]SHARMA S D,DOLAN M,ILYUSHECHKIN A Y,et al.Recent developments in dry hot syngas cleaning processes[J].Fuel,2010,89(4):817-826.
[5]CHEN Y S,HSIAU S S,SMID J,et al.Removal of dust particles from fuel gas using a moving granular bed filter[J].Fuel,2016,182:174-187.
[6]杨国华,周江华,舒海平,等.双层滤料颗粒床过滤除尘新方法的研究[J].动力工程学报,2005,25(6):891-894.
[7]杨国华,周江华.双层滤料过滤床的压降特性研究[J].热能动力工程,2007,22(3):267-269.
[8]于春令,杨国华,王兴云.双层滤料颗粒床高温除尘技术及其在冶金炉窑中的应用[J].环境工程,2009,27(2):15-17.
[9]田素瑞,颗粒床用于高效过滤微细粉尘的研究[D].宁波:宁波大学,2016.
[10]SHI K Y,YANG G H,HUANG S,et al.Study on filtering characteristics of aerosol particulates in a powder-grain dual-layer granular bed[J].Powder Technology,2015,272:54-63.
[11]GAO N,WANG X,CUI Q,et al.Study of oily sludge pyrolysis combined with fine particle removal using a ceramic membrane in a fixed-bed reactor[J].Chemical Engineering and Processing:Process Intensification,2018,128:276-281.
[12]朱能,赵赫.金属纤维毡用于锅炉烟气高温除尘的研究[J].煤气与热力,2005,25(1):48-51.
[13]孙鹏,孟文妍,白文峰,等.除尘用金属纤维烧结毡过滤性能研究[J].过滤与分离,2015(2):30-32.
[14]WU M S,LEE K C,PFEFFER R,et al.Granular-bed filtration assisted by filter cake formation:3.Penetration of filter cakes by a monodisperse aerosol[J].Powder Technology,2005,155(1):62-73.
[15]RODON I,LEE K C,PFEFFER R,et al.Granular-bed filtration assisted by filter-cake formation:2.The panel bed gas filter with puffback renewal of gas-entry surfaces[J].Powder Technology,2005,155(1):5-16.
[16]AZADI M.Multi-fluid eulerian modeling of limestone particles’elutriation from a binary mixture in a gas-solid fluidized bed[J].Journal of Industrial&Engineering Chemistry,2011,17(2):229-236.
[17]TIAN S R,YANG G H,LI Z,et al.Cascade filtration properties of a dual-layer granular bed filter[J].Powder Technology,2016,301:545-556.
[18]CHEN Y S,HSIAU S S,LAI S C,et al.Filtration of dust particulates with a moving granular bed filter[J].Journal of Hazardous Materials,2009,171(1):987-994.
[19]CHEN Y S,HSIAU S S,LEE H Y,et al.Filtration of dust particulates using a new filter system with louvers and sublouvers[J].Fuel,2012,99(9):118-128.