张婉婧,魏小林,李腾,黄俊钦
ZHANG Wanjing,WEI Xiaolin,LI Teng,HUANG Junqin

• 1:中国科学院力学研究所高温气体动力学国家重点实验室
• 2:中国科学院大学工程科学学院
• 3:中国科学院洁净能源创新研究院

摘要(Abstract)：

工业炉窑生产中产生的大量高温含尘气体携带了大量的余热余能,若能得到合理回收利用,将创造巨大的经济价值和环保价值,因此,对高温气体净化除尘是一项实现资源合理利用和环境保护的关键技术。新型的金属多孔材料凭借良好的耐温性、机械性能和导热性等,在高温烟气除尘方面具有很好的适用性和优越性。选择金属丝网除尘器作为研究对象,通过试验和数值模拟相结合的方法,探究除尘器进口气流流量、气流含尘浓度、气流入口温度对于除尘系统压降的影响规律。结果表明,系统压降随着进口空气流量的增大而升高,当进气流量从0.4 Nm~3/h增加到34.3 Nm~3/h时,压降从12.6 Pa迅速升高到1 989 Pa,通入含尘气体产生的系统压降要高于通入相同流量的洁净空气产生的系统压降,压降随着含尘浓度的增加有上升趋势,但含尘浓度大于53 g/m~3时,压降反而下降。进气温度越高,系统平均压降越高,进气温度从13℃上升到202℃时,压降从520.5 Pa上升到941.5 Pa。系统压降与出口温度的模拟结果与试验结果吻合较好。对于进气温度较低(<300℃)的工况条件,除尘器的系统压降主要来自于金属丝网滤袋的表面压降;当温度上升后,压降上升很快,当温度为600℃时,系统压降在3 000 Pa左右,远高于滤袋表面压降,这时需要考虑除尘器结构压降带来的影响。
The large number of high-temperature dust-containing gases produced in the production of industrial furnaces carry a lot of waste heat and energy. If they can be reasonably recycled,it will create great economic and environmental value. Therefore,the purification and dust removal of high-temperature gas is a key technology to realize the effective utilization of resources and environmental protection.The new metal porous material has excellent applicability and superiority in high-temperature flue gas dust removal due to its good temperature resistance,mechanical properties,and thermal conductivity. In this paper,the metal wirework ash bag filter was selected as the research object. Through the combination of experiment and numerical simulation,the influences of the inlet air flow rate,dust concentration,and inlet temperature on the pressure drop of the dust removal system were explored. The experimental results show that the pressure drop of the system increases with the increase of the inlet air flow rate. When the inlet clean air flow rate increases from 0. 4 Nm~3/h to 34.3 Nm~3/h,the pressure drop increases rapidly from 12. 6 Pa to 1 989 Pa. The system pressure drop of dusty gas is higher than that of clean air under the same gas flow rate and the pressure drop increases with the increase of ash concentration in gas. When the dust concentration is higher than 53 g/m~3,the pressure drop decreases. The higher the inlet temperature is,the higher the average pressure drop of the system is. When the inlet temperature rises from 13 ℃ to 202 ℃,the pressure rises from 520.5 Pa to 941.5 Pa. The simulated pressure drops and outlet temperatures are in good agreement with the experimental results. Under the conditions of lower inlet temperatures( <300℃),the system pressure drop of dust collector is mainly affected by the surface pressure drop of the metal wirework filter bag. When the inlet temperatures increases,the pressure drop increases significantly. The pressure drop is approximately 3 000 Pa for the inlet temperature of 600 ℃,greatly higher than thesurface pressure drop of the bag filter. And thus the pressure drop of the structure of dust collector needs to be considered during the design of bag filter.

关键词(KeyWords)： 金属丝网;高温除尘器;气固两相流;数值模拟;压降
sintered metal wirework filter;high temperature gas filter;gas-solid two-phase flow;numerical simulation;pressure drop

Abstract:

Keywords:

基金项目(Foundation): 中国科学院战略性先导科技专项资助项目(XDA21040500)

作者(Author): 张婉婧,魏小林,李腾,黄俊钦
ZHANG Wanjing,WEI Xiaolin,LI Teng,HUANG Junqin

DOI: 10.13226/j.issn.1006-6772.IF20080624

参考文献(References)：

• [1]王社斌,宋秀安．转炉炼钢生产技术[M]．北京:化学工业出版社,2008.WANG Shebin,SONG Xiuan.Production technology of converter steelmaking[M].Beijing:Chemical Industry Press,2008．
• [2]王冠,安登飞,庄剑恒,等．工业炉窑节能减排技术[M]．北京:化学工业出版社,2015.WANG Guan,AN Dengfei,ZHUANG Jianheng,et al.Energy saving and emission reduction technology for industrial furnaces and kilns[M].Beijing:Chemical Industry Press,2015．
• [3]李海英,刘东,张春奇．高温气体除尘技术研究进展[J]．节能,2018,37(10):119-122.LI Haiying,LIU Dong,ZHANG Chunqi.Research progress in high-temperature gas dust removal technology[J].Energy Conservation,2018,37(10):119-122．
• [4]XIAO G,WANG X H,ZHANG J P,et al.Granular bed filter:Apromising technology for hot gas clean-up[J].Powder Technology,2013,244:93-99．
• [5]DAHLIN R S,LANDHAM E C,GUAN X F.Corrosion and flow resistance of metal filter elements used in the cleanup of syngas from the transport gasifier at the power systems development facility[C]//7thInternational Symposium on Gas Cleaning at High Temperature.Newcastle,Australia:[s.n.],2008．
• [6]李冬燕,魏巍,韩峰．高温除尘碳化硅膜的制备及其抗腐蚀特性[J]．化工学报,2019,70(1):336-344.LI Dongyan,WEI Wei,HAN Feng.Preparation and corrosion resistance of Si C membrane using for dust removal in high temperature[J].CIESC Journal,2019,70(1):336-344．
• [7]HEIDENREICH S.Hot gas filtration-A review[J].Fuel,2013,104:83-94．
• [8]PRABHANSU,KARMAKAR M K,CHANDRA P,et al.A review on the fuel gas cleaning technologies in gasification process[J].Journal of Environmental Chemical Engineering,2015,3 (2):689-702．
• [9]LUPION M,NAVARRETE B,ALONSO-FARINAS B,et al.Hot gas filters for coal-based power generation systems:Operating experiences[J].Fuel,2013,108:24-30．
• [10]黄国涛,左孝青,孙彦琳,等．多孔金属过滤材料研究进展[J]．材料导报,2010,24(S2):448-452,456.HUANG Guotao,ZUO Xiaoqing,SUN Yanlin,et al.Progress in porous metal filtration materials[J].Materials Reports,2010,24(S2):448-452,456．
• [11]邢毅．高温除尘过滤材料的研究[J]．过滤与分离,2004,14(2):1-4.XING Yi.Development of filter elements for high-temperature gas filtration[J].Journal of Filtration&Separation,2004,14 (2):1-4．
• [12]FAN X,HE Z,LIN P,et al.Microstructure,texture and hardness of Al-Cu-Li alloy sheet during hot gas forming with integrated heat treatment[J].Materials&Design,2016,94:449-456．
• [13]SLEBODA T,KANE J,WRIGHT R N,et al.The effect of thermomechanical processing on the properties of Fe-40 at.%Al alloy[J].Materials Science and Engineering:A,2004,368 (1):332-336．
• [14]CAGNA M,BOEHLE M.Application of CFD methods for the simulation of the flow through a filter in dependency of the operating time[C]//Rohatgi,U S E.Proceedings of the 2002 ASMEJoint US-European Fluids Engineering Conference.Montreal,Quebec,Canada:[s.n.],2002．
• [15]高晖,郭烈锦．除尘器袋室结构改进及内部气固两相流动特征分析[J]．西安交通大学学报,2000,33(5):50-54.GAO Hui,GUO Liejin.Characteristics of gas-solid two-phase flow for filter dust collector with low entry[J].Journal of Xi'an Jiaotong University,2000,33(5):50-54．
• [16]吴晓风,沈来宏．烧结金属除尘技术的研究进展[J]．化工装备技术,2004(5):10-14.WU Xiaofeng,SHEN Laihong.Research progress of sintered metal dust removal technology[J].Chemical Equipment Technology,2004(5):10-14．
• [17]张健,汤慧萍,奚正平,等．高温气体净化用金属多孔材料的发展现状[J]．稀有金属材料与工程,2006(S2):438-441.ZHANG Jian,TANG Huiping,XI Zhengping,et al.Current situation of porous metal used in high temperature dust removal[J].Rare Metal Materials and Engineering,2006(S2):438-441．
• [18]代广平,张博松,罗晓兰,等．金属丝网过滤器过滤初期阶段压力特性的研究[J]．过滤与分离,2009,19(4):1-4,16.DAI Guangping,ZHANG Bosong,LUO Xiaolan,et al.Experimental study on pressure characteristics of the wirework filter during beginning period[J].Journal of Filtration&Separation,2009,19(4):1-4,16.