热冲击对燃煤电厂袋式除尘滤料织物性能的影响  

EFFECT OF THERMAL SHOCK ON FABRIC PROPERTIES OF BAG FILTER MATERIALS FOR COAL-FIRED POWER PLANTS

作　　者：郭二宝[1,2] 吕梅群 刘兴成 荣鼐 GUO Erbao;LÜMeiqun;LIU Xingcheng;RONG Nai(Advanced Technology Institute of Green Building Research of Anhui Province,Anhui Jianzhu University,Hefei 230601,China;Key Laboratory of Indoor Thermal and Humid Environment,Anhui Jianzhu University,Hefei 230601,China;CISDI Shanghai Engineering Co.,Ltd,Shanghai 200940,China)

机构地区：[1]安徽建筑大学安徽省绿色建筑先进技术研究院,合肥230601 [2]安徽建筑大学建筑室内热湿环境实验室,合肥230601 [3]中冶赛迪上海工程技术有限公司,上海200940

出　　处：《环境工程》2023年第3期84-89,102,共7页Environmental Engineering

基　　金：安徽建筑大学引进人才及博士启动基金项目(2018QD44);安徽省高校省级自然科学研究重点项目(KJ2020A0465);安徽省绿色建筑先进技术研究院开放课题(AHLJY-2020-02);上海市青年科技英才扬帆计划(21YF1460000)。

摘　　要：为研究不同温度的热冲击对PPS+PTFE复合滤料及其覆膜后的织物性能的影响,对比160,180,200℃条件下滤料热处理24 h后,滤料热收缩性、特征孔径、孔径分布以及过滤性能的变化。结果表明:经纬向热收缩率随着温度的升高而增加;且覆膜后低于未覆膜前;未覆膜时随着温度升高,中值孔径先减小后增加,最小孔径增加,在200℃时最小孔径增加至12.08μm;覆膜后,随着温度升高,中值孔径和最小孔径均先增加后减小;受特征孔径和孔径分布的影响,未覆膜时,未加热滤料的孔径分布最为集中,主要分布在12.54~13.25μm,其对0.7~2.5μm的PM2.5分级过滤效率可达到70%以上,高于3组加热后的过滤效率;覆膜后,200℃下的孔径分布最为集中,分级过滤效率最高,对0.5~2.5μm的微细颗粒物分级过滤效率可达到80%以上。In order to study the effect of thermal shock at different temperatures on properties of PPS and PTFE composite filter materials and their coated fabrics,the changes in heat shrinkage,characteristic pore size,pore size distribution and filtration performance of filter materials after 24 h of treatment were compared,under the temperature of 160,180,200℃.The results showed that latitude and longitude heat shrinkage rate increased with the increase in temperature.After lamination,the membrane played a certain protective role on the filter material,so the longitude and latitude heat shrinkage rate after the coating was lower than the longitude and latitude heat shrinkage rate,before the film was coated.Before the lamination,with the increase of temperature,the median pore size decreased first and then increased,the minimum pore size increased,and the minimum pore size increased to 12.08μm at 200℃;after the lamination,with the increase of temperature,the median aperture and the minimum pore size were increased first and then decreased.Affected by the characteristic aperture and pore size distribution,the pore size distribution of the uncoated film was the most concentrated,mainly distributed between 12.54μm and 13.25μm,and its PM2.5 classification filtration efficiency with a grain size of 0.7 to 2.5μm was about 70%,higher than the filtration efficiency after heating in three groups.After lamination,the pore size distribution was most concentrated when heating at 200℃,the classification filtration efficiency was the highest,and the PM2.5 classification filtration efficiency reached 80%above for the fine particulate matter with a grain size of 0.5 to 2.5μm.

关 键 词：热冲击 热收缩率 孔径分布 特征孔径 过滤性能 

分 类 号：X773[环境科学与工程—环境工程]