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某燃煤电厂烟气协同净化技术集成和运行效果分析

[2018-4-28] 点击:

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作者 | 苗博 吴东垠 牛国栋  华能铜川照金电厂  西安交通大学动力工程多相流国家重点实验室

SUIZHERANMEIJIZUYANQIJINGHUAJISHUDEFAZHAN,RENMENYIJINGYISHIDAOFENBIESHIYONGTUOLIUHETUOXIAOJISHU,BINGBUNENGDADAOHENHAODEWURANWUTUOCHUXIAOLV,ERQIETUOCHUSHEBEIPANGDA,ZHANDIKONGJIANDA,CHUTOUZIHEYUNXINGFEIYONGANGGUI。WEILEJIEJUECILEIWENTI,GEZHONGYANQIJINGHUAZONGHELIYONGJISHUDEDAOLEZHONGSHIHEFAZHAN,YITIHUADETUOLIUTUOXIAOGONGYIJIEGOUJINCOU,YANQIJINGHUASHEBEICHUTOUZIHEYUNXINGFEIYONGDI,MANZULEDARONGLIANGJIZUDEXUYAO。YINCI,KAIFAYANQIZONGHEJINGHUAJISHUYICHENGWEIYANQIJINGHUADEFAZHANQUSHI。

MUQIAN,GUOWAIZHUYAOCAIYONGDETUOLIUJISHUBAOKUOXUNHUANLIUHUACHUANG、SHIFATUOLIU、PENWUTUOLIUDENG,TUOXIAOJISHUBAOKUOXUANZEXINGCUIHUAHAIYUANJISHU(SCR)HEXUANZEXINGFEICUIHUAHAIYUANJISHU(SNCR)。YANCHENTUOCHUJISHUPUBIANCAIYONGDIANCHUCHENQI,ZAIBEIMEI、OUMENG、RIBENDENGGUOJIA,DIANCHUDIANQIDEFUGAIMIANJISUOZHANCHUCHENSHEBEIDEFENEBIJIAODA。SUIZHEGUONEIDUIYUHUANBAOYAOQIUDERIYIYANGE,GUONEIYIKAIZHANLECHAOJIEJINGPAIFANGHUANBAOXIETONGGAIZAO。

XIANYOUDERANMEIJIZUCAIYONGLEBUTONGDETUOLIU、TUOXIAO、CHUCHENDENGCHAOJINGPAIFANGJISHU,TUOLIUJISHUYINGEDIANCHANGDESHIJIQINGKUANGERYI;TUOXIAOCHAODIPAIFANGJISHUJIBENXIANGSI,YIYOUHUADIDANRANSHAO、ZENGJIASCRCUIHUAJIWEIZHU;CHUCHENCHAODIPAIFANGJISHUDUOXUANYONGJIAZHUANGDIWENSHENGMEIQIHESHISHICHUCHENQI,TONGSHIJIEHEDIANCHUCHENGAOPINDIANYUANGAIZAO、DIANCHANGBUZHIYOUHUADENGJISHU。

YINCI,ZAIBAOZHENGWOGUOJINGJIGAOSUWENDINGZENGZHANGDEQIANTIXIA,KAIZHANRANMEIJIZUYANQIWURANWUCHAOJINGPAIFANGJISHUXIANDEYOUWEIZHONGYAO,ERQIEYOUYUGUOJIADUIHUANJINGWURANWUDEPAIFANGJIZHILIYAOQIUGENGJIAKEKE,XUNQIUGAOXIAOJIALIANDEYANQICHAOJINGPAIFANGJISHUGENGJIAJUYOUFAZHANQIANJING。

1 锅炉布置

MOU600 MWJIZUWEIYALINJIEZIRANXUNHUANGUOLU,QISHUIXITONGWEIQIANGZHIXUNHUAN,SIJIAOQIEYUANRANSHAO,GUTAIPAIZHA,ZHIFENXITONGCAIYONGZHONGSUMOZHENGYAZHICHUIZHIFENXITONG。

(1)脱硫系统

JIZUCAIYONGSHISHISHIHUISHIYISHIGAOSHIFAYANQITUOLIUGONGYIXITONG。MEITAILUPEIBEIYITAOYANQITUOLIU(FGD)SHIFATUOLIUZHUANGZHI。TUOLIUJICAIYONGBAINIHESHIHUISHIFENYUANLIAO,CAIGOUDESHIHUISHIFENYIQILISHUSONGDEFANGSHISONGRUSHIHUISHIFENCANG,ZAITONGGUOJILIAOZHUANGBEISONGZHIJIANGYEJIAOBANXIANGZHICHENGSHIHUISHIJIANGYE,YOUJIANGYEBENGSONGZHIXISHOUTA。

(2)脱硝系统

TUOXIAOXITONGSHOUXIANJINXINGLEDIDANRANSHAOQIDEGAIZAO,MUQIANZHUYAOSHIZHENDUISCRDEZHUANGZHIJIGONGYIJINXINGGAIZAO。SHIJIYUNXINGGUOCHENGZHONG,NOxRUKOUNONGDUWEI200~250mg/m3,CHUKOUSHIJIYUNXINGZHIYIDIYU50mg/m3。

(3)除尘系统

JIZUYUANCAIYONGDIANDAIZUHESHICHUCHENQI,BUZHIZAIGUOLUKONGYUQIZHIHOUHEYINFENGJIZHIQIAN。ZAICHUCHENQIJINKOUQIANZENGJIAYANQININGJUQI,YUANDIANCHUCHENQIJINXINGXIAOFENQUHEGAOXIAODIANYUANGAIZAO,TONGSHIJINXINGCHUWUQITIXIAOGAIZAOYIJINYIBUTIGAOTUOLIUXITONGCHUCHENXIAOGUO。GUOLUPEIZHIYOUSHUANGSHIDIANCHANGHEDIANCHUCHENQI,CAIYONGLUTIANWOSHIBUZHIFANGSHI。

2 改造方案设计

RANMEIDIANCHANGYANQIZHONGWURANWU(SO2、Nox、FENCHENDENG)DEKONGZHISHOUDUOZHONGYINSUYINGXIANG,TEBIESHIZAIMUQIANJIYANGEDEHUANBAOYAOQIUXIA,YIBUSHIYANQIJINGHUASHEBEINENGGOUDULIJIEJUEDEWENTI。GUOLURANSHAO、TUOLIUSHEBEI、TUOXIAOSHEBEI、YANQIHUANREQIDENGDOUZHIJIEYINGXIANGJIZUYANQIZHONGWURANWUDEPAIFANG。YINCI,XUYAOCAIYONGXIETONGKONGZHIJISHU,JIANLIZHENGGEJIZUYANQICHAOJINGPAIFANGXITONG,DUIGUOLURANSHAO、TUOLIU、TUOXIAO、GAOXIAOCHUCHENQI、SHISHIDIANCHUCHENQI、YANQIHUANREQIDENGJINXINGXIETONGYOUHUAKONGZHI。

GENJUXIANZAIYUNXINGJIZUDESHIJIQINGKUANG,TONGGUODUIGEGEYANQIJINGHUAXITONGDEFENXI,SHEJILEYANJIULUXIAN,NITONGGUOJISUANYUFENXI,DEDAOYIZHONGYOUHUADEDIANCHANGYANQICHAOJINGPAIFANGGAIZAOFANGAN,QIYANJIULUXIANRUTU1SUOSHI。

图1改造方案研究路线

JINGGUOQUANMIANDELILUNFENXIHELUNZHENG,JINKENENGBAOZHENGYUANYOUSHEBEIBUJINXINGDAFANWEIGAIDONGDEQINGKUANGXIA,JIEHEXIANYOUHUANBAOSHEBEIHECHANGDI,KEKAOLVCAIYONGRUXIAGAIZAOFANGAN:

(1)TUOLIUGAIZAO:ZAIXIANYOUXISHOUTAWEIZHIYUYINFENGJIHUNHEYANDAOZHIJIAN,XINJIAN1JIXISHOUTAZUOWEIYIJIXISHOUTA,YUANXISHOUTAGAIZAOZUOWEIERJICHUANLIANTA。TONGGUOXINJIAZHUANGYITAOTUOLIUYUXITA,JIANGXIANYOUXISHOUTAZUOWEISHENDUCHULITA。

(2)TUOXIAOGAIZAO:YOUYUYIJINGANZHUANGLEDIDANRANSHAOQI(LNB),YUNXINGZHONGSCRCUIHUAJIRUKOUDENOxNONGDUJUNZAI350mg/m3YIXIA,YANCONGCHUKOUNOxNONGDUZAI100mg/m3YIXIA。YUANYOUSCRTUOXIAOXITONGCAIYONGLIANGCENGCUIHUAJIJIA1CENGCUIHUAJIYULIUCENGBUZHIXINGSHI,JICAIYONGDESHI"LNB+SCR”FANGAN。

(3)SHISHICHUCHENGAIZAO:GUANSHISHISHICHUCHENZAIHUAGONGXINGYEYINGYONGJIAODUO,BANSHISHIDIANCHUCHENZAIGUONEIRANMEIDIANCHANGZHONGDEDAOLEGUANGFANYINGYONG。SHISHIDIANCHUCHENQIXINGNENGZHUYAODEYINGXIANGYINSUBAOKUOYUNXINGKONGZHIFANGSHI、DIANCHANGCANSHU、RUKOUFENCHENNONGDU、DIANCHANGFENGSUXUANQUDENG。YANCHENKONGZHIXITONGGENJUBUTONGDEJIZUPEIZHIKEYOUDUOZHONGXITONGZUCHENG,GENJUMUQIANGUONEIDEYANCHENKONGZHIZHUANGKUANG,ZHUYAOYOUYIXIALIANGZHONGXITONG:

系统1:锅炉+脱硝+高效除尘器+湿法脱硫+湿式电除尘器

XITONG2:GUOLU+TUOXIAO+GAOXIAOCHUCHENQI+SHIFATUOLIU

DANGXUYAODADAOCHAOJINGPAIFANGSHIDUOCAIYONGXITONG1DEFANGAN,XUYAOGAOXIAOCHUCHENQI、SHIFATUOLIUHESHISHIDIANCHUCHENQIGEZICHENGDANBUFENJIANPAIRENWU。

(4)MGGHGAIZAO:DIWENYANQICHULIXITONG(MGGH)SHIGUANSHIYANQIYIYANQIREJIAOHUANQI。GAIYANQIXITONGYOULIANGBUFENZUCHENG:

①YANQILENGQUEQI(FGC )BUZHIZAIYINFENGJIZHIHOU、TUOLIUXISHOUTAZHIQIANDESHUIPINGYANDAO,LIYONGNINGJIESHUIJIANGDIYANQIWENDU;

②YANQIZAIREQI(FGR)BUZHIZAISHISHICHUCHENQIHEYANCONGZHIJIANDESHUIPINGYANDAOSHANG,LIYONGJIAREHOUDENINGJIESHUIZAIQUJIARETUOLIUHOUDEJINGYANQI,TISHENGYANQIDEWENDU。

MGGHLIYONGGUOLUWEIBUYANQIDEYURELAIJIAREYANCONGRUKOUYANQI,XIANGDUISGHGENGYOULIYUNENGYUANZONGHELIYONG,BINGQIEYOUYUMGGHSHIYONGDESHIGUANSHIJIARE,BUHUICUNZAIHUIZHUANSHIGGHLOUYANQIDEQUEDIAN。

3计算结果及分析

3.1 烟气中污染物年减排量计算

(1)SO2年减排量

SHEBEIGAIZAOHOU,SO2TUOCHULIANGJITUOLIUXIAOLVRUTU2SUOSHI。YOUTU2KEYIKANCHU,TUOLIUXITONGJINGGUOGAIZAOZHIHOU,1#JIZULIANGJITUOLIUTADETUOLIULIANGFENBIEWEI1103.01mg/m3HE287.34 mg/m3,TUOLIUXIAOLVFENBIEWEI78.5%HE20.5%,SO2DETUOCHUGUOCHENGZHUYAOZAIYIJITUOLIUTAZHONGJINXING。2#JIZULIANGJITUOLIUTADETUOLIULIANGFENBIEWEI1261.14mg/m3HE199.4mg/m3,TUOLIUXIAOLVFENBIEWEI85.5%HE13.5%。

图2改造后SO2脱除量及脱硫效率

 

(2)NOx年减排量

YUANYOUTUOXIAOXITONGJINGGUODIDANRANSHAOHOU,TUOXIAOXITONGNOxRUKOUNONGDUCONG300mg/m3JIANXIAODAO100mg/m3。JINGGUOYANQICHAOJINGPAIFANGGAIZAOZHIHOU,JIZUNOxPAIFANGNONGDUXIAOYU50mg/m3,LIANGTAIJIZUMEINIANKEYIJINYIBUJIANSHAONOxPAIFANGLIANG1150t。

(3)烟尘年减排量

DIANCHUCHENQIYUANYOUSHIJICHUCHENXIAOLVWEI99.6%,JINGGUODIANCHUCHENQITIXIAOGAIZAOZHIHOU,YANCHENNONGDUDIYU30mg/m3,GAIGUOLUCHANSHENGDEYANCHENNIANPAIFANGLIANGWEI798t,LIANGTAIJIZUMEINIANKEJIANSHAOYANCHENPAIFANGLIANG2918t。TONGGUOCHAOJINGPAIFANGGAIZAOHOU,JIZUYANCHENPAIFANGNONGDUXIAOYU5mg/m3,LIANGTAIJIZUGUOLUYANCHENNIANPAIFANGLIANGWEI138t,LIANGTAIJIZUMEINIANKEJINYIBUJIANSHAOYANCHENPAIFANGLIANG689t。

(4)污染物年减排量总计

JINGGUOTUOLIU、TUOXIAOJICHUCHENDENGYANQIXIETONGJISHUGAIZAOZHIHOU,TUOLIU、TUOXIAOJICHUCHENXIAOGUOJUNYOUMINGXIANTIGAO。TU3XIANSHILESO2、NOxHEYANCHENDEPAIFANGNONGDUJITUOCHULV。

YANQIJINGHUASHEBEIGAIZAOZHIQIAN,SO2PAIFANGNONGDUWEI195.42mg/m3,JINGGUOGAIZAOZHIHOU,SO2PAIFANGNONGDUDADAO14.33m/m3,TUOLIUXIAOLVCONG95.9%SHANGSHENGDAO99.1%;

SHEBEIGAIZAOZHIQIAN,NOxPAIFANGNONGDUWEI98.22mg/m3,JINGGUOGAIZAOZHIHOU,NOxPAIFANGNONGDUDADAO32.05mg/m3,TUOXIAOXIAOLVDEDAOLEMINGXIANDETIGAO,CONG66.6%SHANGSHENGDAO89.3%;

SHEBEIGAIZAOZHIQIAN,YANCHENPAIFANGNONGDUWEI27.32mg/m3,JINGGUOGAIZAOZHIHOU,YANCHENPAIFANGNONGDUDADAO4.23m/m3,CHUCHENXIAOLVYOUSUOTIGAO。

图3各污染物排放浓度及脱除率

ANZHAONIANLIYONG5 000 hJISUAN,BIAO1JICHULEGEWURANWUDENIANJIANPAILIANG。RUBIAO1SUOSHI,YUANSO2、NOx、YANCHENDEJIANPAILIANGFENBIEWEI107900t/NIAN、4600t/NIAN、2918t/NIAN,JINGGUOYANQIJINGHUASHEBEIXIETONGGAIZAOZHIHOU,SO2、NOx、YANCHENDEJIANPAILIANGYOUFENBIEZENGJIALE3795t/NIAN、1150t/NIAN、689t/NIAN。

表1烟气年减排结果

BIAO1YANQINIANJIANPAIJIEGUO

3.2 通过改造解决的设备问题

MOURANMEIJIZUDESHEBEIGAIZAOBUJINSHIWURANWUDADAOLEHUANBAOZHIBIAODEPAIFANGBIAOZHUN,ERQIEHAIJIEJUELESHEBEIZHANGQIYUNXINGCUNZAIDEWENTI,BINGDUIZHENGGEXITONGJINXINGLEWANSHANHEYOUHUA,BAOZHENGLEGELEIJINGHUASHEBEINENGGOUZHANGQIWENDINGANQUANDEYUNXING。

(1)脱硫系统

YOUYUYANQIRUKOUCHUYUYANQIHEJIANGYEGANSHIJIAOJIEMIANSHANG,RONGYIFASHENGRUKOUYANDAODAQIAODUSAI,ZAOCHENGTUOLIUTARUKOUYANQIYALIZENGDAHETUOLIUTANEIBUYANQILIUCHANGFENBUBUJUNYUN,SHENZHIYINQICHUWUQIDUSAI,GAIZAOQIANTUOLIUTARUKOUYANDAODUSAIFAZHANRUTU4SUOSHI。GAIZAOHOUANZHUANGYOUDANGSHUIBAN,KEYIYOUXIAODIFANGZHIJIANGYEJINRUYANDAO。TUOLIUTAYUNXINGSHI,SHANGFANGDANGSHUIBANXINGCHENGDESHUILIANKEYIYOUXIAODIXISHOUSO2BINGQIEYOULIYUQILIUJUNYUNFENBU,LIANGCEDANGSHUIBANKEFANGZHITANEIKONGQIXUANLIUJIANGJIANGYEDAIRUYANDAO。TONGGUODUITUOLIUTARUKOUDEGAIZAO,JIBAOZHENGLERUKOUYANDAODEQIANGDU,YOUDADAOLEFANGZHIYANDAODAQIANGDUSAI,TONGSHISHANGBUDANGSHUIBANXINGCHENGDESHUILIANHAINENGGOUQIDAOXISHOUSO2HEJUNYUNFENBUYANQIDEMUDE。

图4改造前脱硫塔烟道堵塞发展
图4改造前脱硫塔烟道堵塞发展

(2)脱硝系统

YOUYUYUANXITONGSHEJIQUEXIAN,TUOXIAOFANYINGQIYANDAORUKOUDEPAIHUIGUANSHOUKONGJIANXIANZHI,PODUJIAOHUANWUFAZHENGCHANGPAIHUI,ZHANGQIYUNXINGRONGYIZAOCHENGJIHUIDUSAI。ZAIYUANJIHUIBUWEIFUJINJIERUCHUIHUIYASUOKONGQI,YASUOKONGQIQUZIYUGONGYONGYASUOKONGQIXITONG,YUNXINGZHONGDINGQIDUIGAIBUWEIJINXINGCHUISAO,JIANGYANDAODIBUDEJIHUICHUIRUTUOXIAOFANYINGRUKOU,SUIYANQIJINRUDIANCHUCHENPAICHU。

GAIZAOWANCHENGHOU,JIHUIXIANXIANGMINGXIANXIAOCHU,JIAOZHIYUGAIZAOQIANCUIHUAJICENGYACHAZENGJIABUMINGXIAN,DADAOLEYUQIMUDE。

3.3 经济性分析

YANQIZONGHEJINGHUASHEBEIGAIZAOCHENGBENZHUYAOBAOKUOBIANDONGCHENGBEN、GUDINGCHENGBEN、CAIWUFEIYONGDENG,QIZHONGBIANDONGCHENGBENBAOKUONIAOSU、SHUIDIAN、SHIHUISHI、SHIGAO、NIANJUNZHESUANGENGHUANCUIHUAJIDENG;GUDINGCHENGBENBAOKUOZICHANZHEJIU、YUNXINGGUANLIRENYUANGONGZI、SHEBEIJIANXIUFEIDENG。ZAIGANSHIYANCONGFANGANZHONG,GEYANQIJINGHUAXITONGDEYUNXINGFEIYONGRUBIAO2SUOSHI。GANYANCONGFANGANSHIDANGBUJIAZHUANGSHIFATUOLIUZHUANGZHISHI,YANQICHUKOUWENDUZAI120℃ZUOYOU,YANQIZHONGSHUIZHENGQIHANLIANGJIAODI,YANQIDUIYANCONGDEFUSHIBUYANZHONG;SHIYANCONGFANGANSHIDANGJIAZHUANGSHIFATUOLIUZHUANGZHI,JINGGUOSHIFATUOLIUJIYANQISHENGWENZHIHOU,YANQIZHONGSHUIZHENGQIHANLIANGYAOGAO,YANQIZHONGSHENGCHENGDEH2SO3HEH2SO4HUIJIAZHONGDUIYANCONGDEFUSHI。

TONGGUODUIBIFENXIKANCHU,GANYANCONGFANGANHESHIYANCONGFANGANZHONG,SHEBEIGAIZAOHOUZHENGTIXITONGDANWEICHENGBENZENGJIAZHIFENBIEWEI10.23YUAN/(MW·h)HE9.79YUAN/(MW·h),SHIYANCONGFANGANDECHENGBENZENGJIAZHILVEXIAOYUGANYANCONGFANGAN。YINCI,ZAIMANZUWOGUODAQIHUANJINGWURANWUPAIFANGBIAOZHUNDEQIANTIXIA,TUIJIANXUANYONGSHIYANCONGFANGANZUOWEIYANQIJINGHUASHEBEIGAIZAODESHOUXUANFANGAN。

表2干湿烟囱方案的经济性分析   元/(MW·h)

BIAO2GANSHIYANCONGFANGANDEJINGJIXINGFENXI   YUAN/(MW·h)

4 结论

(1)GENJUMOU600 MWRANMEIDIANCHANGYANQIJINGHUADESHEJIFANGSHIHESHIJIYUNXINGQINGKUANG,DUIGAIRANMEIDIANCHANGJINXINGFANGANSHEJIYUJINGJIXINGFENXI,ZUIZHONGHUODEYOUHUAFANGAN。TONGGUODUIYANQICHAOJINGPAIFANGSHEBEIDEGAIZAOJIXIANCHANGSHICE,GEWURANWUPAIWUJUNDADAOGUOJIAHUANBAOBIAOZHUN,SHUOMINGGAIZAOFANGANSHIGAOXIAOKEXINGDE;

(2)CAIYONGCHENGSHUDESHIHUISHIYISHIGAOSHIFATUOLIUJISHU,XINJIANYIJITUOLIUTA,YUYUANTUOLIUTAZUCHENGCHUANLIANSHUANGTAXUNHUANFANGSHI。CAIYONGGAOXIAODESCRTUOXIAOZHUANGZHI,JINLIANGJIANGDIYANCONGCHUKOUNOxPAIFANGNONGDU。TONGGUOZHONGXINJINXINGLIUCHANGMONI、YOUHUADIAOZHENG,JIAZHUANGBEIYONGCENGCUIHUAJI,TONGGUOHELIFENPEIGEXIANGGUANSHEBEIDECHUCHENXIAOLVHEYANCHENKONGZHI,JIEHEGAIRANMEIDIANCHANGSHIJIYUNXINGQINGKUANG,TUIJIANCAIYONGZAISHIFATUOLIUHOUZENGJIASHISHIDIANCHUCHENQIDEGAIZAOFANGAN;

(3)YANQICHAOJINGPAIFANGSHEBEIGAIZAOZHIHOU,YANQITUOLIUXIAOLVCONG95.9%TIGAODAO99.1%,TUOXIAOXIAOLVCONG66.7%SHANGSHENGDAO89.3%,CHUCHENXIAOLVDADAO99.9%,YANQIGELEIWURANWUDENIANJIANPAILIANGJUNYOUMINGXIANDETIGAO;

(4)CONGYANQICHAOJINGPAIFANGSHEBEIGAIZAOCHENGBENDEFENXIKANCHU,GANYANCONGFANGANHESHIYANCONGFANGANZHONGSHEBEIGAIZAOHOUZHENGTIXITONGDANWEICHENGBENZENGJIAZHIFENBIEWEI10.23YUAN/(MW·h)HE9.79YUAN/(MW·h),SHIYANCONGFANGANDECHENGBENZENGJIAZHIXIAOYUGANYANCONGFANGAN。YINCI,TUIJIANXUANYONGSHIYANCONGFANGANZUOWEIYANQIJINGHUASHEBEIGAIZAODESHOUXUANFANGAN。

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