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袋式除尘技术的发展与应用

发布日期:2018-12-13 10:29    关键字: 袋式除尘器

【ZHAIYAO】DAISHICHUCHENJISHUDEMEICIGEXINWUYIBUSHICONGLVLIAODEBIANGEGENGXINKAISHI。O、GAOFENGSU、DIZULI、DIJIAGE、NAIGAOWENFUHEXINGZHENCIZHANSHILVLIAOFAZHANDEBIRANQUSHI。DAISHICHUCHENJISHUHUIZAIBUTONGLINGYUZHONGDEDAOGENGJIAGUANGFANDEYINGYONG。

【GUANJIANCI】DAISHICHUCHENJISHU LVLIAO WENDU

1 DAISHICHUCHENJISHUDEFAZHAN

DAISHICHUCHENJISHUSHIYIZHONGZHUYAODECHUCHENSHOUDUAN,GUANGFANYINGYONGYUYEJIN、ZHUZAO、JIANCAI、DIANLIDENGXINGYE。YOUYUDAISHICHUCHENQIJUYOUCHUCHENXIAOLVGAO、NENGMANZUYANGEPAIFANGBIAOZHUNDETEDIAN,SHOUDAOPUBIANZHONGSHI,DAISHICHUCHENQIJIXIANGGUANJISHUHUODELEJIDADEFAZHANYUYINGYONG。

德国水泥工业80%的废气是通过袋式除尘后净化的,这使水泥粉尘的散失量小于其产量的0.05%。一些传统上使用电除尘器的场所(如水泥厂回转窑尾和冷却机)也开始改造为大型袋式除尘器,原因是袋式除尘器的设备费用往往只有电除尘器的一半,更重要的是,电除尘器的排放浓度很难达到50mg/m3。许多发达O(如美国、加拿大、澳大利亚)在电厂的除尘中,也大量采用袋式除尘器替代电除尘器,使得电厂粉尘的散发量大大降低。

ZAIO,DAISHICHUCHENJISHUZAISHUINI、MEITAN、QILISHUSONGDENGXINGYEDEYINGYONGYEDEDAOJIAODADEFAZHAN。DAISHICHUCHENJISHUDEYINGYONGZHUYAOQUJUEYULVLIAODEXUANCAI。ZHANGQIYILAI,ZHIYUEDAISHICHUCHENJISHUFAZHANDEYUANYINSHILVLIAODENAIWENWENTIYIJIGUOLVFENGSUPIANDIWENTI。20SHIJI80NIANDAIZHONGQI,SUIZHELVLIAOJISHU、ZHIZAOJISHU、KONGZHIJISHUDENGXIANGGUANJISHUDEFAZHAN,DAISHICHUCHENJISHUZAILIYAOSHUINICHANGHONGGANJIYAOTOUYAOWEI、CHAOGAOGONGLVDIANHULU、GAOLUMEIQIJINGHUA、TANHEICHANGWEIQISHOUJIDENGXINGYEDOUQUDELEHENDADEJINBU。

2 MUQIANSHIYONGDELVLIAOPINZHONG

目前用于布袋式除尘器的国产耐高温滤料品种较少,使用纤维的品种集中在玻璃纤维和美塔斯(Metarnax)化学纤维两种原料。滤布的材质主要有:小高炉用的机织玻璃纤维布,为中碱玻璃纤维,一般为后处理,也有用素布的。300m3左右的中型高炉绝大部分使用的为前处理或后处理的下班纤维布,中碱、无碱均有。部分,300m3中型高炉近年来采用首钢设计的高炉煤气净化技术———长袋低压脉冲除尘器,选用的滤料为杜邦———帝人公司的美塔斯针刺过滤毡。大型炼铁高炉(如首钢、太钢)使用的滤料为日本进口的美塔斯针刺毡。上海五钢公司100t/h直流电弧炉使用的滤料为涤纶针刺毡。立窑水泥厂的袋式除尘器使用的滤料为玻璃纤维,结构为膨体纱和连续纤维的,还有Midwesco公司提供的玻璃纤维滤料。

3 LVLIAODEXUANYONGYUANZE

LVLIAOTONGCHANGSHIYIXIANWEIWEIYUANLIAOZHICHENGDE,GEZHONGXIANWEIJUYOUBUTONGDELIHUATEXING,ZAIMANZUWENDU、SHIDU、QIANGDU,YIJINAIHUAXUEWENDINGXINGYAOQIUFANGMIANGEYOUSUOZHANG。ZUOWEILVLIAOYONGTU,BIXUCHONGFENZHANGWOHANCHENQITIDETEXING,RENZHENDUIZHAOGEZHONGXIANWEISUOJUYOUDEXINGNENG,JIAYIHELIXUANZE。

HANCHENQITIDEWENDUSHIXUANYONGLVLIAODESHOUYAOYINSU。ANLIANXUGONGZUOWENDU(GANTAI)KEBALVLIAOFENWEISANLEI:DIYU130℃WEICHANGWENLVLIAO;130℃~200℃WEIZHONGWENLVLIAO;GAOYU200℃WEIGAOWENLVLIAO。TONGCHANGYAOANLIANXUSHIYONGWENDUXUANDINGLVLIAO,DUIYUQITIWENDUJILIEBODONGDEGONGKUANGTIAOJIAN,YIXUANZEANQUANXISHUSHAODAXIEDE,DANSHUNJIANFENGZHIWENDUBUDECHAOGUOLVLIAODESHANGXIANWENDU。DUIYUGAOWENYANQI,KEYIZHIJIEXUANYONGGAOWENLVLIAO,YEKEANCAIQULENGQUECUOSHIHOUDEWENDUXUANYONGZHONGWENHUOCHANGWENLVLIAO,XUANQUSHITONGGUOJISHUJINGJIFENXIHOUQUEDING。NENGNAI200℃YISHANGGAOWENDELVCAI,CHUMEITASIHEBOLIXIANWEIWAI,HAIYOUEERZUO、JUBENLIUMI、JUYAXIANAN、JUSIFUYIXI、BUXIUGANGXIANWEIDENG;HOUJIZHONGXIANWEIDENAIWENXING、HUAXUEWENDINGXINGBINGBUBIQIANLIANGZHONGCHA,DANYAOCONGZHIZAOJIAGONGCHENGBENHESHENGCHANNANYICHENGDUSHANGJIAYIFENXIQUEDING。

除温度因素外,还要综合考虑含尘气体的湿度、腐蚀性、可燃性、爆炸性,粉尘形状、粒径大小、附着力和凝聚性,以及根据袋式除尘器的清灰方式来选择滤料。清灰方式也是选择滤料结构品种的主要因素,不同清灰方式的除尘器因清灰能量、除尘滤袋形变特征的不同,需选用不同结构品种的滤料。例如脉冲除尘器为脉动清灰,属于高能清灰,要求滤料强度高、耐磨、耐折、耐冲击,需采用毡类滤料,不宜应用玻纤布和机织布。

ZHENCIZHANLVLIAOSHIXIANGDUIYUFANGZHILVLIAODEYIGEJINBU,JUYOUGENGGAODECHUCHENXIAOLVHETOUQILV;TONGGUOSHAOMAOHUOREYAGUANGDENGBIAOMIANZHENGLI,JUYOULIANGHAODEFENCHENBOLIXINGNENG。GENGZHUYAODESHI,CAIYONGMAICHONGPENCHUIDEQIANGLIQINGHUIDEFANGSHI,KEBAOZHENGSHEBEIZULICHUYUJIAODIDEFANWEIZHINEI。

MUQIANYOUXINGNENGGENGYOUDELVLIAO,LIRU:BOMOLVLIAO、TUCENGLVLIAODENG,CHENGRANKEYIHUODEGENGGAODECHUCHENXIAOLVHEGUOLVFENGSU、GENGDIDESHEBEIZULI、GENGZHANGDESHIYONGSHOUMING,DANJIAGEJIAOGUI。BOMOLVLIAOTONGCHANGZHIZAIHUISHOUGUIZHONGWULIAOHUOJINGHUAYAOQIUTEBIEGAODECHANGHE,CAIZHIDESHIYONG,JISHIZAIFADAOHEDIQU,QISHICHANGZHANYOULVYEBUGAO。YINCIZHANLEILVLIAOZAIJINHOUHENZHANGYIDUANSHIQINEIJIANGCHENGWEIGUOLVCAILIAODEZHULIUCHANPIN。

4 ZHANLEILVLIAOZAIYINGYONGZHONGCUNZAIDEWENTI

长袋低压脉冲除尘器经过实践证明,具有滤速高,清灰效果好、滤袋寿命长、设备简单、故障少、操作维护方便等优点,完全可以取代大布袋反吹风除尘系统。但目前所使用的两种毡类滤料均存在不同缺点,还不是O理想的滤料。

MEITASIZHENCIZHANDESHIYONGSHOUMINGZHANG,DANJIAGEJIAOGUI,NAIWENZAI220℃ZUOYOU,DUIXIANCHANGCAOZUOSHUIPINGHEWENDUSHUIPINGJUNYAOQIUJIAOGAO。BOXIANZHANLVDAISUINAIWENBODONGFANWEIJIAODA,DANJIAGEBIANYI,DANTONGMEITASIZHENCIZHANXIANGBI,YUNXINGZULIGAO、NAIMOHENAIZHEXINGCHA、SHIYONGSHOUMINGDUAN。ERZHEDEZONGHESHIYONGCHENGBENXIANGCHABUTAIDA,DUIBIZHIXIA,QIANZHEXINGNENGHAO,JIAGEYEGAO;HOUZHEXINGNENGCHA,JIAGEYEDI。

5 XINXINGDENAIGAOWENLVLIAO

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CONGBIAOZHONGKANCHU,FUMEISIZHANDEQIANGDUJIAOHAO;DUANLIESHENZHANGLVJINWEI6%~9%,DADADIYUCHANGGUIHECHENGXIANWEILVLIAO;TOUQIXINGHAOYUBOXIANZHAN,LVEDIYUMEITASIZHAN;JINGTAICHUCHENLVZAI325MUBIAOZHUNFENCHENZHUANGTAIXIADADAO99.99%,GUOLVXIAOLVWANQUANKEYIDADAOGAOLUMEIQIJINGHUADEYAOQIU。

FUMEISIGUOLVZHAN,ZAISHAOGUANYELIANCHANGYINGYONGXIAOGUOHENHAO,SHOUMINGDA9GEYUE~10GEYUE,BIBOXIANZHANSHOUMINGZHANG6GEYUE~7GEYUE;ZAIPANJINTIANRANQIHUAFEICHANGYINGYONG,ZAI300℃YANQITIAOJIANXIA,SHIYONGSHOUMINGDA6GEYUE;ZAIMENGXISHUINI907CAIPIAOKAIHU,YINGYONGYU4m/minDEGAOGUOLVFENGSUCHUCHENQIZHONG,YOUSHIWENDUHAICHAOBIAO,MUQIANSHIYONGSHOUMINGYICHAOGUOBANNIAN。ZONGHEYISHANGSHIJIANZHENGMING,ZAIGAOLUMEIQIJINGHUAZHONG,FUMEISIGUOLVZHANDESHIYONGSHOUMINGYUBOXIANZHANXIANGBI,KETIGAO0.5BEI~2BEI。

6 GAOLUMEIQIJINGHUAYONGBUDAIJILVLIAODEFAZHANQUSHI

近年来,随着我国工业的飞速发展,工业粉尘对大气的污染在加重,排放标准日益严格,因而对滤料提出了更高的要求。滤料是布袋除尘器的心脏,每次袋式除尘技术的革新无一不是从滤料的变革更新开始的。O、高风速、低阻力、低价格、耐高温复合型针刺毡是滤料发展的必然趋势。氟美斯过滤毡滤料将应用于大型袋式除尘器。

ZHANGDAIDIYAMAICHONGCHUCHENQIYINQIGUOLVFENGSUGAO、TOUZIJIESHENG、CAOZUOYUNXINGFANGBIAN,RENGJIANGZAIYIDUANSHIJIANNEICHENGWEIDAISHICHUCHENQIDEZHULIJIXING。FANCHUIFENGBUDAICHUCHENQIYINZHANDIMIANJIDA、GUOLVFENGSUDI、TOUZIGUIMODA,JIANGCHUYUZHUBUTAOTAIDEJUMIAN。DAXINGDAISHICHUCHENSHEBEIGUOLVFENGSUDI,SHUDINENGQINGHUI,YIYUBAOHUBUDAI,KEBAOZHENGCHUCHENQIWENDINGDIYUNXING,TARENGSHIMOUXIELINGYUDEZHUYAOJINGHUASHEBEI,ZHISHISHIYONGDELVLIAOZAITIGAOGUOLVJINGDUHELVLIAOQIANGDU、JIANGDIYUNXINGZULI、FANGZHISHENLOUJIJIANGDIBUDAISHENZHANGLVDENGFANGMIANHAIHUIBUDUANDIGAIJIN。

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