【行業新聞】垃圾焚燒發電廠煙氣凈化工藝探討

     

?文章導讀

選擇SNCR(選擇性非催化還原法):旋轉噴霧脫酸塔:半干法(Ca(0H))+干法(8aHC03)+活性碳噴射+高效袋式除塵器+SCR(選擇性催化還原法)相結合的煙氣凈化工藝,對垃圾焚燒煙氣中污染物質的去除有很好的效果,在生產運行中能實現穩定的達標排放,設備運行穩定。

?來源:《資源節約與環保》??作者:張力

CONGLAJIFENSHAOYANQIZHONGDEZHUYAOWURANWUCHUFA,YICHENGDOUSHIMOULAJIFENSHAOFADIANCHANGGONGCHENGWEILI,TANTAOMUQIANZHULIULAJIFENSHAOFADIANCHANGYANQICHULIDEGONGYILUXIAN、GONGYIFANGFAYIJISHEJIYAODIAN,BINGTICHULESHEJISILU,BINGDUIYANQITUOSUANGONGYIZUOLEFENXI。

1、引言

SUIZHUWOGUOCHENGSHIHUAJINCHENGDEJIAKUAI,RENMINSHENGHUOSHUIPINGBUDUANTIGAO,LAJICHANSHENGLIANGYEZHUNIANDIZENG。WEIBIMIANHUANJINGWURAN,DUILAJIJINXINGZONGHEZHILI,HELILIYONG,YISHIKEBURONGHUANDEZHONGYAOKETI。LAJIFENSHAOSHIMUQIANFADAGUOJIAPUBIANTUIXINGDEYIZHONGLAJICHULIFANGSHI,KEYIYOUXIAOFENJIELAJIZHONGDEYOUDUYOUHAIWUZHI,SHAMIEGEZHONGBINGYUANTI,FENSHAOHOUXINGCHENGDEGUTICANZHAJIANLIANGKEDA80%YISHANG,ZHANDISHAO,FANGBIANTIANMAI,HUANNENGCHANSHENGDIANNENGJINXINGZAILIYONG,KEYISHUOLAJIFENSHAOZHENZHENGSHIXIANLELAJICHULIDEJIANLIANGHUA、ZIYUANHUA、WUHAIHUA。

LAJIFENSHAOYANQIZHONGDEWURANWUKEFENWEIKELIWU(FENCHEN)、SUANXINGQITI(SOx、NOx、HCl、HFDENG)、ZHONGJINSHU(Hg、Pb、Cr、Cu、Ni、Zn、Mn、Sb、Cd、SeDENG)HEYOUJIJUDUWURANWU(ERWUYING、FUNANDENG)SIDALEI。WEIFANGZHILAJIFENSHAOCHULIGUOCHENGZHONGDUIHUANJINGCHANSHENGDEERCIWURAN,BIXUCAIQUYANGECUOSHI,LIYONGYANQIJINGHUAXITONGDUIFENSHAOCHANSHENGDEYANQIJINXINGCHULI,DADAODABIAOPAIFANGDEMUDE。

BENWENYIGANGJIANCHENGTOUCHANDECHENGDOUSHIMOULAJIFENSHAOFADIANCHANGWEILI,DUILAJIFENSHAOYANQICHULIGONGYIJINXINGFENXIHETANTAO。

2、垃圾焚燒發電廠概況

GAIXIANGMULAJICHULIGUIMOWEI2400t/d,FENSHAOLUCHULINENGLIWEI4x600t/d,XUANZE4MPa,400oCZHONGWENZHONGYAZHENGQICANSHUDEYUREGUOLU。MEITAIFENSHAOLUPEIZHIYITAOYANQICHULIXITONG。

3、煙氣凈化處理工藝

3.1 工藝流程

XUANZESNCR(XUANZEXINGFEICUIHUAHUANYUANFA)+XUANZHUANPENWUTUOSUANTA+BANGANFA(Ca(OH)2)+GANFA(NaHCO3)+HUOXINGTANPENSHE+GAOXIAODAISHICHUCHENQI+SCR(XUANZEXINGCUIHUAHUANYUANFA)XIANGJIEHEDEYANQIJINGHUAGONGYI。ZHIXING《OUMENGWURANWUPAIFANGBIAOZHUN》2000/EC/76。

3.2 SNCR系統

SNCRXITONGSHIBAANSHUIRONGYEPENSHEDAOFENSHAOLUNEI,CHUQUFENSHAOLUNEIDEDANYANGHUAWUDESHEBEI,HUAXUEFANYINGFANGCHENGSHIRUXIA:

4NH3+4NO+O2——4N2+6H2O

TONGGUOZAIGUOLUDIYIYANDAOPENRUWUZHUANGANSHUIRONGYE,YANQIZHONGDEDANYANGHUAWUNONGDUCONGGUOLURUKOUSHEJIZHI300mg/Nm3BEIFENJIEDAOSHENGMEIQICHUKOU200mg/Nm3ZHIXIA。SUOXUANSHUITONGGUOYASUOKONGQIHESHUANGLIUTIPENZUIBEIPENJINLUNEI,GENJUSHENGMEIQICHUKOUNOgNONGDU,DCSXITONGZIDONGJINXINGYANSUANYIKONGZHIANSHUIRONGYEGONGYINGBENGDESHUCHU。ANSHUIRONGYEGONGYINGBENGSONGLAIDEANSHUIRONGYEYUXISHISHUIHUIHE,ZAIYOUANSHUIRONGYEGUANXIANJIAOBANQIJINXINGCHONGFENHUNHE,SONGDAOPENZUIPENSHE。

GAIGONGCHENGZAIGUOLUDIYIYANDAOFENDUOCENGGONGSHEZHI6GENPENWUPENZUI。ANSHUIRONGYECHUGUANYIZUO,GONGSNCRHESCRXITONGGONGTONGSHIYONG,CUNCHU20%ANSHUIRONGYE7TIANYONGLIANG。ANSHUIRONGYEGONGYINGBENGSHE5TAIDINGLIANGBENG,4YONG1BEI。XISHISHUIGONGYINGBENGCAIYONGWOLIUBENG,SHE2TAI,1YONG1BEI。

3.3 脫酸反應系統

TUOSUANFANYINGXITONGBAOKUOJIXIEXUANZHUANPENWUTUOSUANTAHEXIAOSHIHUIPENSHEZHUANGZHI。MEITIAOFENSHAOXIANSHEYIZUOPENWUTUOSUANTA。TUOSUANTAWEIYUANTONGXING,DIBUWEIZHUIXING,ZHUITISHANGSHEZHIDIANBANREXITONGYIFANGZHIHUIZHAJIELU,BINGJINXINGBAOWEN,DIBUYOUPOSUIJIHEXIELIAOFA,YIBAOZHENGFANYINGWUNENGSHUNLIPAICHU。TUOSUANTASHANGFANG,SHIDAIDAOLIUBANDEGUAKEXINGRUKOUTONGDAO,NENGSHIJINRUYANQICHANSHENGLIANGHAODEWOLIUHEJUNYUNFENPEI。TUOSUANTASHANGFANGBUZHIYOUSHIHUIJIANGGAOWEIYECAO,YIBAOZHENGGONGJIANGYALIHENGDING。GENJUYANCONGCHUHCl、SO2、HFDENONGDU,DCSJISUANCHUSUOXUDEXIAOSHIHUIJIANGLIULIANG,JINERTONGGUOXIAOSHIHUILIULIANGFAMENKONGZHIXIAOSHIHUILIULIANG。

GONGYISHUIYONGZUOYANQILENGQUESHUI。WEIWEICHIBANGANSHITUOSUANTACHUKOUWENDUYIDING,LENGQUESHUILIULIANGTONGGUOLENGQUESHUILIULIANGFAZIDONGKONGZHI。LENGQUESHUILIULIANGFAYOUSHEZHIZAIDCSNEIDEBANGANSHITUOSUANTACHUKOUWENDUDIAOJIEQIDIAOJIE。3.4SHIHUIJIANGZHIBEIXITONG

SHIHUIJIANGZHIBEIXITONGWEIGONGYONGXITONG,4TIAOYANQIJINGHUAXIANGONGYONGYITAOZHIJIANGXITONG,BAOKUO1GEXIAOSHIHUICHUCANG、2GEZHIBEIGUAN、1GEJIANGYEGONGYINGZHUANGZHI。XIAOSHIHUICHUCANGZONGRONGJI350m3,ZHUCUNTIANSHU7TIAN。MEIGEZHIBEIGUANJUNSHEJIAOBANZHUANGZHIJIYEWEIZHISHI,ZHUYAOGONGNENGSHIWEITUOSUANTALIANXUTIGONGSUOXULIULIANGDENONGDUDAYUE10-17%DESHIHUIJIANG。SHEZHIYITAIDAIJIAOBANQIDEXIAOSHIHUIGONGYINGGUAN,RONGLIANGWEI4TIAOXIAN8XIAOSHIXIAOHAOLIANG,GONGYINGGUANYEWEIJINXINGCELIANG,YOUDCSJINXINGJIANSHI。SHEZHI2TAIXIAOSHIHUIJIANGGONGYINGBENG,1YONG1BEI,ZHUANGYOUBEIGONGYINGGUANYEWEIXIANZHIDELIANSUOHUILU。

3.5 碳酸氫鈉及消石灰噴霧系統

DANGJIXIEXUANZHUANPENWUQIJINXINGWEIXIUHUOGENGHUANSHI,JIANGQIYONGGAIXITONG,KEYISHIHCl、SOxJIANSHAODAOPAIFANGZHIBIAOFANWEINEI。GAIZHUANGZHISHEZHIZAIBUDAICHUCHENQIRUKOUYANDAOCHU。LINGWAI,ZAIBUDAICHUCHENQILVDAIBIAOMIANYUTUSHI,YEYAOYUNXINGBENSHEBEI。

SHEYIZUOTANSUANQINGNALIAOCANG,RONGLIANGWEI1TAIJIXIEXUANZHUANPENWUQITINGZHIGONGZUOSHI,MANZUYANQIJINGHUAXUYAO3TIANDELIANG。LIAOCANGNEISHELIAOWEIKAIGUAN、KONGQILIUHUAZHUANGZHIJIZHENDONGSHIJIAQIAOPOJIEZHUANGZHI。

ZAILIAOCANGDIBUSHE4GEPAIFANGKOU,MEIGEPAIFANGKOUSHEZHIDINGLIANGGEILIAODECHULIAOZHUANGZHI。TONGGUOJIANGYANQIZHONG'(1、0,DESHEDINGZHIYUSHIJIZHIJINXINGBIJIAODEDAOPIDKONGZHIZHIJINERTONGGUOBIANPINQILAIKONGZHIFENTILIULIANG。

TONGYANG,SHEXIAOSHIHUILIAOCANG1ZUO,SHEJISILULEISIYUTANSUANQINGNALIAOCANG。

TANSUANQINGNAHUOXIAOSHIHUIYOUGUFENGJISHUSONGZHIPENSHEQIPENRENBUDAICHUCHENQIRENKOUYANDAONEI。RUGUOGONGYINGGUANXIANFASHENGDUSAIDENGQINGKUANG,GUANXIANNEIDEYALIKAIGUANHUIJIANCECHULAI。

3.6 活性炭儲存和輸送系統

HUOXINGTANCONGTUOSUANTAHOU、BUDAICHUCHENQIQIANDEYANDAOHUNHEQIZHONGPENREN,ZHUYAOZUOYONGSHIKONGZHIERWUYINGJIZHONGJINSHUDEPAIFANGLIANG,SHIQIDADAOPAIFANGYAOQIU。WEILESHIHUOXINGTANFENMOHEYANQICHONGFENHUNHE,ZENGJIAHUOXINGTANHEYANQIDEJIECHUSHIJIAN,BENXITONGSHEZHILETESHUDEYANQIGUANDAOHUNHEQI。WEIBAOZHENGXITONGYUNXINGDEWENDINGXING,CHULESHEZHILUOCIGUFENGJISHUSONGWULIAOWAI,HUANLINGJIELEYITAOYASUOKONGQIGUANLUZUOWEIPANGLU,YIBAOZHENGXITONGDELIANXUYUNXING。HUOXINGTANDEYONGLIANGGENJUFENSHAOXIANYANQILIANGJINXINGKONGZHI。

3.7 布袋除塵器

SHEZAIXIANMOCHONGQINGSAOHELIXIANMOCHONGQINGSAOLIANGZHONGFANGSHI。ZHENGCHANGYUNXINGSHI,CAIYONGZAIXIANMOCHONGQINGSAO,LIYONGYACHAKONGZHIZIDONGYUNXING。DINGQIQINGHUIFANGSHIWEIDANGXITONGDADAOSHEDINGDEDINGQIQINGHUISHIJIAN,MOCHONGYASUOKONGQICONGBUDAIDEQINGJIECEPENRENBUDAI,CHUILUOFUZHUDELVDAISHANGDEHUICHEN。

BENXITONGGONGQIYOUDULIZHUQIGUANGONGGEI,CHUCHENXIAOLV>99.84,ZULIXIAOYUDENGYU1500Pa。

3.8 煙氣再加熱系統及SCR系統

YANQIZAIJIAREXITONGSHIBACONGBUDAICHUCHENQICHULAIDEYANQIJIAREDAOSHIHESCRXITONGTUOXIAOFANYINGWENDUDEJIAREZHUANGZHI。BUDAICHUCHENQICHUKOUYANQIWENDUYUEWEI145oC,GAIWENDUBUSHIHECUIHUAJIHUOXINGHUAWENDU,XUYAOSHENGWENZHIYISHANG。LIYONGGAOYAZHENGQIZUOWEIREYUANJINXINGREJIAOHUAN。_ueditor_page_break_tag_

SCRXITONGSHIBAANQIPENRENCUIHUAJIFANYINGTANEI,QUCHUDANYANGHUAWUDESHEBEI。CUIHUAFANYINGTASHEZHIZAIYANQIZAIJIAREQIDEXIAYOU,ZAICUIHUAFANYINGTAZHONGDETUOXIAOFANYINGYUSNCRXITONGXIANGTONG:

4NH3+4NO+O2——4N2+6H2O

CUIHUAJICAIZHIWEITiLING2-WLING3-V205XILIE,FENGWOZHUANGJIEGOU。CUIHUAJIYOU2CENG:1CENGBEIYONGGOUCHENG。ANSHUIRONGYEGONGYINGLISHIYONGMOSHILI,SHE5TAI,4YONGYIBEI。WEIKONGZHIYANCONGCHUKOUDE80xNONGDU,ANSHUIRONGYELIULIANGYOUDCSYANSUANCHULI,ZIDONGKONGZHIZAIZUIHESHIDELIULIANG。

3.9 飛灰輸送系統

BAOKUO:LUOXUANSHUSONGJI、GUABANSHUSONGJI、DOUSHITISHENGJI、FEIHUICHUCANG。TUOSUANTAJIBUDAICHUCHENQIHUIDOUZHONGDEHUIJINGLUOXUANSHUSONGJISONGZHIGUABANSHUSONGJI,ZAIYOUGUABANSHUSONGJIJIANGFEIHUISONGZHIDOUSHITISHENGJIZHONG,FEIHUIJINGTISHENGHOULUORENFEIHUICHUCANGZHONG。CHUCANGZHONGDEHUIFENLIANGLUJINXINGCHULI,YILUTONGGUOGANHUISANZHUANGJIPAICHU,LINGWAIYILUYOUSHUSONGJISONGZHIFEIHUIGUHUAXITONG。

3.10 煙氣凈化系統運行效果

BENTAOJINGHUAGONGYIZAILAJIFENSHAOFADIANCHANGTOURENYUNXINGYINIANDUOYILAI,YUNXINGWENDING,DADAO《OUMENGWURANWUPAIFANGBIAOZHUN》2000/EC/76。

4、煙氣凈化系統設計思路

4.1 YANQIJINGHUAXITONGBUYINGXIANGFENSHAOLUDEWENDINGYUNXING。TUOSUANFANYINGXITONGJUYOUDONGTAISHIYINGNENGLI,BAOZHENGZHUANGZHIGAOXIAOWENDINGYUNXING。

4.2 DUISUANXINGQITI、YANCHEN、ERWUYINGDENGWURANWUJINXINGYOUXIAOTUOCHU,QUEBAOYANQIDABIAOPAIFANG。

4.3 JISHUZHUANGBEISHUIPINGXIANJIN、SHIYONG、KEKAO、JINGJI。

4.4 SHEBEIBUZHIJINCOUHELI,ZHANDISHAO,ZUIDAXIANDUJIANGDITOUZI。

4.5 CAIYONGJISUANJIKONGZHIXITONG,TIGAOZIDONGHUASHENGCHANSHUIPING,JIBENSHIXIANZHONGKONGSHIJIZHONGKONGZHI,WEIJIANGDIGONGRENLAODONGQIANGDU,TIGAOSHENGCHANXIAOLV,CHUANGZAOLIANGHAOTIAOJIAN。

4.6 CHUYUJINGJIXINGKAOLV,JINGHUAXITONGSHIYONGJIAGEBIANYI、YIYUCAIGOU、BIANYUYUNSHUDEYAOJI。

結語

XUANZESNCR(XUANZEXINGFEICUIHUAHUANYUANFA):XUANZHUANPENWUTUOSUANTA:BANGANFA(Ca(0H))+GANFA(8aHC03)+HUOXINGTANPENSHE+GAOXIAODAISHICHUCHENQI+SCR(XUANZEXINGCUIHUAHUANYUANFA)XIANGJIEHEDEYANQIJINGHUAGONGYI,DUILAJIFENSHAOYANQIZHONGWURANWUZHIDEQUCHUYOUHENHAODEXIAOGUO,ZAISHENGCHANYUNXINGZHONGNENGSHIXIANWENDINGDEDABIAOPAIFANG,SHEBEIYUNXINGWENDING。GAIGONGYIDEXUANZEYIJIDUISHEJIYAODIANDEFENXI,KEWEIXIANGGUANGONGCHENGJIANSHETIGONGCANKAOHEJIEJIAN,YOUTUIGUANGSHIYONGDEJIAZHI。