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  • 电除雾器超低排放效果
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湿法脱硫与半干法脱硫工艺比较总结

BENWENZHUYAOZHENDUIBANGANFATUOLIUYUSHIFATUOLIUGONGYIZHANKAIYANJIU,FENXILEBANGANFATUOLIUYUSHIFATUOLIUGONGYIDEXIANGGUANWENTI,BINGDUIBANGANFATUOLIUYUSHIFATUOLIUGONGYIDEYAODIANHEBUTONGZHICHUJINXINGLEBIJIAOHEZONGJIE,KEGONGJINHOUCANKAO。

BANGANFATUOLIUHESHIFATUOLIUGONGYIXUANZESHIFENZHONGYAO,ZUOHAOBANGANFATUOLIUYUSHIFATUOLIUGONGYIXUANZEHEBIJIAO,YOULIYUWOMENGENGHAODERENSHIHEZHANGWOBUTONGDEGONGYI,CONGERZHENDUISHIJIXUQIULAIXUANZEHESHIDEGONGYICUOSHI,TIGAOSHIJIDEYINGYONGZHILIANG。

1、脱硫方法概述

半干法脱硫指的是喷雾干燥烟气脱硫以及循环流化床烟气脱硫(也可以为半干法,最后处理不同)。经破碎后石灰在消化池中经消化后,与脱硫副产物和部分煤灰混合,制成混合浆液,经浆液泵升压送入旋转喷雾器,经雾化后在塔内均匀分散。热烟气从塔顶切向进入烟气分配器,同时与雾滴顺流而下。雾滴在蒸发干燥的同时发生化学反应吸收烟气中的SO2。

湿法脱硫是脱硫过程在溶液中进行,吸附剂和脱硫生成物均为湿态。其特征是采用一种碱性液体与煤气的硫化氢、二氧化硫和氰化氢进行化学反应,生成新的不易气化的硫类化合物,再将吸收液与氧在催化剂作用下解析脱硫、脱氰并将其作为副产品回收,以除去煤气中大部分硫化氢、二氧化硫及氰化氢。脱硫系统主要有三大环节:吸收、再生、回收。吸收的目的在于用吸收剂将气体中所含硫化氢尽可能的脱除。再生的目的在于使吸收了硫化氢之后的吸收剂复原,并回收其中的硫。回收是将分离出的硫泡沫浓缩加工,即指硫泡沫的收集,过滤和熔硫得到副产品硫黄及残液的处理回收。

威美环保运行中的湿法脱硫除尘器

WEIMEIHUANBAOSHIHUISHI-SHIGAOFASHIFATUOLIUXIANGMU

2、干法脱硫工艺与石灰石一石膏湿法脱硫比较

2.1 适用煤种。

BANGANFARCFB:SHIYONGYUZHONG、DILIUMEI。

SHIHUISHIYISHIGAOSHIFA:SHIYONGMEIZHONGGUANG。

2.2 Ca/S比。

BANGANFARCFB:TUOLIULV>90%SHIWEI1.3~1.5。YANGHUAGAICHUNDUYAOQIU≥90%,BINGYAOYOUFEICHANGGAODEHUOXING(T60BIAOZHUN),DABUDAOYISHANGYAOQIUSHI,JIANGYINGXIANGZHUANGZHIDETUOLIULVJIZHENGCHANGYUNXING。

SHIHUISHIYISHIGAOSHIFA:1.01~1.05,YIBANWEI1.03,CHUNDUDABUDAOYAOQIUSHI,ZUIZHONGJINYINGXIANGTUOLIUFUCHANPINSHIGAODEZHILIANG。

2.3 脱硫效率。

BANGANFARCFB:WENDINGYUNXINGYIBANZAI80%ZUOYOU,RUOXUYAOJINYIBUTIGAO,ZEXUJIANGDIYANQIQUJINWENCHA,ZENGJIACa/SHEPENSHUILIANG,DANHUIDUIXIAYOUSHEBEI,RUCHUCHENQI、YINFENGJIDENGDAILAIBULIYINGXIANG。YANQIHANLIULIANGBODONGSHI,YINWEIYOUDAXUNHUANHUILIANG,NANYILINGMINDIAOZHENGKONGZHI,TUOLIUXIAOLVNANYIBAOZHENG。

SHIHUISHIYISHIGAOSHIFA:YIBANKEZAI95%YISHANGWENDINGYUNXING,DUIHUANBAOYAOQIUDESHIYINGXINGQIANG。YANQIHANLIULIANGBIANHUASHI,YIYUDIAOZHENGKONGZHI,TUOLIUXIAOLVJIAOWENDING。

2.4 耗电量。

BANGANFARCFB:JIZURONGLIANGDE0.5oA~1.0%,TUOLIUXIAOLVZAI80%ZUOYOUSHI,WEI0.6%ZUOYOU;DANGTUOLIUXIAOLV>90%SHI,HAODIANLIANGSHANGSHENGHENKUAI,JIANGDADAO1%ZUOYOU。

SHIHUISHIYISHIGAOSHIFA:JIZURONGLIANGDE1.0%~1.5%。

2.5 对ESP(电除尘器)的影响。

BANGANFARCFB:CHUSHISHEJISHIESPFUHEHENGAO,JINKOUNONGDU800g/Nm3(YUANGAOYUDIANCHANGZHENGCHANGDIANCHUCHENQIJINKOUDE20~30g/Nm3),ESP2CHUCHENXIAOLVJIANGDADAO99.9875%。SUITUOLIULVDEBIANHUAZENGJIACa/S,ESPFUHEJIJUZENGJIA。DANGYANQIHANLIULIANGBIANHUASHI,WEIBAOZHENGTUOLIULV,HUOWEIMANZUHUANBAOYAOQIUDEBUDUANTIGAOERTIGAOTUOLIUXIAOLV,CAIQUYISHANGJIANGDIYANQIQUJINWENCHA,ZENGJIAPENSHUILIANGHECa/SCUOSHISHI,JIANGDAOZHIESPDIWENFUSHI,PAIHUIYIZHANJIE(TABIYEYIYUJIEHUI),YANZHONGSHI,JIANGYINGXIANGZHUANGZHIDEZHENGCHANGYUNXING[2]。

SHIHUISHIYISHIGAOSHIFA:MEIYOUHOUESP,WUYINGXIANG。JINGTUOLIUTAXIDIHOU,YANCHENZONGLIANGJIANSHAO50%~80%ZUOYOU,FGDCHUKOUYANCHENNONGDUXIAOYU50mg/Nm3。

2.6 对机组的影响。

BANGANFARCFB:YINGUZHANGTINGDIANDENGYUANYINSHICFBTINGYUN,HUIDAOZHITANEIGUTAIWUCHENJI,ZHONGXINQIDONGXUQINGLICHENJIGUTAIWU,YOUYUWUPANGLU,DANGHOUESPHEHUIHUIXITONGFASHENGDUSAIJINXINGJIANXIUSHI,JIZUJIANGTINGYUN。

SHIHUISHIYISHIGAOSHIFA:YINFGDSHIDULIXITONG,YOUPANGLU,GUWUYINGXIANG。

2.7对机组负荷的适应性。

BANGANFATUOLIUCHUCHENYITIHUAGONGYI:FUHEDEBIANHUAHUIYINQIYANQILIUSUDEBIANHUA,CONGERYINGXIANGTUOLIUFANYINGJIZHUANGZHIDEYUNXING。

SHIHUISHIYISHIGAOSHIFA:JIAOHAO。

半干法脱硫除尘设备

BANGANFAYANQITUOLIUGONGYI

2.8水。

BANGANFARCFB:SHUIZHIYAOQIUGAO;WUFEISHUIPAIFANG。

SHIHUISHIYISHIGAOSHIFA:HAOSHUILIANGXIANGDUIDUOYIDIAN,DANSHUIZHIYAOQIUBUGAO,KEYONGSHUIYUANSHUI;JINYOUSHAOLIANGFEISHUIPAIFANG。

2.9吸收剂制备。

BANGANFARCFB:XUDAPILIANGWAIGOUFUHEYAOQIUDET60BIAOZHUNDESHIHUIFEN,RCFBTUOLIUXIAOGUODEBAOZHENGJIZHUANGZHIDEYUNXINGKEKAOXINGWANQUANYILAIYUSHIHUIDEGAOCHUNDUJIGAOHUOXING[3]。

SHIHUISHIYISHIGAOSHIFA:KEWAIGOUSHIHUISHIFENHUOKUAILIAO,SHIHUISHIKUAILIAOJIAGEBIANYI,ZHIJIEGOUFENZEKEDAFUDUJIANGDITOUZIJIHAODIANLIANG,DANXIANGYINGZENGJIALECAIGOUCHENGBEN。

2.10脱硫塔出口温度。

BANGANFARCFB:80℃。YAOTIGAOTUOLIUXIAOLV,BIJIANGZENGJIAPENSHUILIANG,CONGERSHITUOLIUTACHUKOUWENDUJINYIBUJIANGDI,DANHUIZENGJIADUIESPDEFUSHI。

SHIHUISHIYISHIGAOSHIFA:≥50℃。YOUYUTUOLIUTAPAIFANGYANWENDI,ZHENGGEXITONGZENGJIALEFANGFUCHULI,BINGZENGJIALEMGGHSHEBEIYITIGAOPAIFANGYANWEN,CONGERSHITOUZIZENGJIA。

2.11副产品输送利用。

BANGANFARCFB:MUQIAN,JINSHIYIYONGYUTIANKENG、PULU,YINGYONGJIAZHIDI。YONGYUQITACHANGHEDEYINGYONGFANGFAYANJIUBUDUO。HUIYICHANSHENGZHANJIE,JIYINGXIANGSHUSONG,YEYINGXIANGZHUANGZHIDEYUNXING。DANGTUOLIUZHAPAIRUHUICHANGSHI,JIANGYINGXIANGFENMEIHUIDEZONGHELIYONG。ZAIPAOQIGUOCHENGZHONGXUYAOKAOLVZENGSHEHESHIDECHUYUNSHESHI,TONGSHIYEZENGJIAYIDINGDEYUNSHUHECHUCUNCHENGBEN。

SHIHUISHIYISHIGAOSHIFA:TUOLIUSHIGAOZHILIANGYOUYUTIANRANSHIGAO,KEZONGHELIYONG,YINGYONGJIAZHIJIAOGAORUCAIYONGPAOQIFA,KEJIESHENGBUFENTOUZI,SHUSONGYEBUHUIYOUWENTI[4]。

2.12占地面积。

BANGANFARCFB:ZAIDARONGLIANGJIZUKAOLVCAIYONG1LU1TASHIZHANDIJIAOXIAO。

SHIHUISHIYISHIGAOSHIFA:JIAODA。

3、结论和建议

3.1JIELUN。ZONGSHANGSUOSHU,BANGANFATUOLIUYUSHIFATUOLIUXIANGBI,JISHUGENGJIACHENGSHU,YUNXINGJINGYANGENGJIAFENGFU,TUOLIUJIGONGYINGYOUBAOZHENG,TUOLIUFUCHANPINLIYONGHAO,XITONGGONGYINGSHANGJIAODUO;JINGYINGFEIYONGXIAO,CHUSHITOUZIGAO,ZONGCHENGBENFEIYONGJIAODI,XITONGZHANDIMIANJIJIAODA。MEIGEDIANCHANGYOUGEZIDESHIJIQINGKUANG,ZAIFGDZHUANGZHISHEJISHANGYEYOUBUTONG。FANGANBIJIAOXUANZEZHONGBUJINXUYAOKAOLVBANGANFA、SHIFADEJISHUYINSU,HAIYAOKAOLVGEZHONGSHIJICUNZAIDEWENTI:RUTUOLIUJIDEGONGYING、FEIZHADECHULI、DUIHUANJINGBIANHUADESHIYING、ZHENGFUDEGUIHUADENG[5]。

3.2JIANYI。SHIFATUOLIUGONGYISHIMUQIANSHIJIESHANGYINGYONGZUIDUO、ZUIWEICHENGSHUDEJISHU,XISHOUJIJIALIANYIDE、FUCHANWUBIANYULIYONG、MEIZHONGSHIYINGFANWEIKUAN,BINGYOUJIAODAFUDUJIANGDIGONGCHENGZAOJIADEKENENGXING。DUIDARONGLIANGJIZU,CONGJISHUDECHENGSHUXING、KEKAOXINGYIJIHUANBAODEGAOYAOQIUKAOLV,YICAIYONGSHIHUISHI/SHIGAOSHIFA。

BANGANFARCFBGONGYITUOLIUXIAOLVJIAOGAO,JIANSHETOUZIJIAOSHENG,ZHANDIMIANJIJIAOSHAO,ZAINENGMANZUGAOPINWEISHIHUIGONGYINGBINGTUOSHANCHULITUOLIUHUIDETIAOJIANXIA,JUYOUJIAOHAODEFAZHANQIANJING,BIJIAOSHIYONGYUZHONGXIAOJIZUHELAOJIZUDETUOLIUGAIZAO。

JIESHUYU

ZONGSHANGSUOSHU,ZHENDUIBANGANFATUOLIUYUSHIFATUOLIUGONGYI,WOMENYAOJINXINGQUBIEFENXI,JINERXUANZEGENGJIAHESHIDEGONGYI,BENWENZONGJIELEBANGANFATUOLIUYUSHIFATUOLIUGONGYI,BINGYANJIULEGONGYIZHIJIANDECHABIE,KEGONGJINHOUCANKAO。