300MW机组烟气湿法脱硫系统设备常见问题原因分析及防范措施优化

29120103QINGHAIELECTRICPOWERVol29No1Mar,2010:(1976-),,,,:2009-09-04300MW,(,750001)::,,:;;;:X701.3:B:1006-8198(2010)01-0041-07EquipmentCommonProblemAnalysisandPreventiveMeasuresOptimizationof300MWUnitsWetFlueGasDesulfurizationSystemMAYongxing,CAOJunAbstract:Thepapermakesanalysisandprobeoncommonfaultproblemofdesulfurizationsystemduringdailyoperationandmaintenancecourse(includingsedimentandjam,corrosiveandabrasion,descendingofdesulfurization,inferiorqualityofbyproductgypsum,systemwaterbalancebreak),aswellasputsforwardsomemeasuresandpreventivemethodscombiningwithpracticaloperatingexperience,inordertofavorablyadvancethestableandeconomicaloperationofdesulfurizationsystem.Keywords:wetfluegasdesulfurizationsystem;equipmentcommonproblem;processprinciple;analysis,,111,,,,300MWGGH111GGHGGH,,SO3,(GGH,);GGH;GGH;,GGH,;GGH;29,GGH,GGH,,,GGH,,图1堵灰的换热元件图2冲洗过的换热元件1GGH,800~900Pa2(P10MPa):1),(200mg/Nm3);2)GGH,;GGH,112,,300MW(04~06MPa)34图3除雾器堵塞情况图4冲洗后还有结垢的除雾器:,SO2,pH,,,:1),,,,,;2),,;,,,,,421:300MW113,,,,,,,,:,,12;,114,,:pH;13;,5:1),;2)pHpH;3),13;4),图5浆液循环泵喷嘴堵塞情况12,SO2SO3NOXHCLHF,H2OO2,,,SO2SO3NOXHCLHF,,,,:!1∀,,,,,,,:(:GGH)(:GGH)(:)(:GGH),6图6石灰石-石膏湿法脱硫常见腐蚀所占比例300MW,121,4329,300MW,,(),,,,:1),;2),,,,,,,,(,01~02mm)2h,(15~20mm),80#2h,,122,,,,,!1∀,789(),图7搅拌器桨叶磨损腐蚀图8循环泵叶轮磨损腐蚀图9循环泵泵壳磨损腐蚀,,,Cl-,()441:300MW,,:,pH,Cl-,20w%t,2~3m/s13,,,,,:pH(54~58);();Cl-:;(L/G)131pHpH,,CaCO3,pH,,1011pH,10,pH5695%,11,pH5695%,pH56∃02,图10脱硫效率与pH值的关系曲线132()图11石灰石利用率与pH值的关系曲线SO2,Ca2+,(CaCO3)90%,,,pH,pH56∃02,,%&,%&F-AlFx,AlFx,%&,%&()PSD,,PSD,,pH,(:),,SO2,,CaCO3,(Mg2+AlFxCl-)!2∀,4529()CaCO3133(L/G)Cl-,,-(GGH),,-,(L/G),,,,,,,;,,,,Cl-SO2H2SO3H2SO4HCl,,SO42-,,,,Cl-,SO42-,Cl-,Cl-,Cl-20000ppm,Cl-60000ppm,Cl-,pH,SO42-;,,,Cl-,10%Cl-,Cl-,!2∀14:;;;;;;pH!2∀141CaSO3∋1/2H2O04%,,,CaCO3,131,pHCaCO3,pHCaCO3,;CaCO3,,,142,,,CaSO3∋1/2H2OCaCO3,CaCO3,,,,SO2,,,,,,,,,,,,143461:300MW,40w%t~60w%t,,(,,)CaCO3,CaCO3,,,144pH,,,,,;,(),,CaCO3,,,CaCO3,%&,3,SO2,pHCl-133,pH50,pH151,,,,1,,,(),(),,:1),,;2),;3),,,1-/m3∋h-1/m3∋h-1-604503292014748()7275275230%BMCR~100%BMCR,,,,,,,,,,,,!3∀(64)4729D:\oracle,,D:\oracle\ora90\network\ADMIN\tnsnamesoraMIS,HOST=10252,52*SERVICE_NAME=inter;:SQL2005SQL2005,(,OLEDBProviderforOracle,%TEST&Oracle,%MIS&,%sa&,Oracle;:,USE!hdserver∀GOCREATESYNONYM!dbo∀mis_vendorFOR!TEST∀!MIS∀MIS_VENDORGOMIS(),MIS_VENDOR,2;:,select*frommis_vendor4SQLServer,Oracle,:!1∀邓君数字档案馆共享功能框架设计!J∀档案学通讯,2008!2∀黄静涛,徐亮,杜琳琳二维条码技术在文件和档案管理中的应用!J∀,中国档案,2006(2)!3∀SQLServer联机丛书!M∀微软联机丛书!4∀!5∀(47)1),,,,;2),,,,,2;3),,,;4),,;,2,,,,,,:!1∀山东电力设计院,姜雨泽湿法烟气脱硫装置腐蚀防护技术!Z∀华电集团脱硫交流培训资料,2007!2∀周至祥,段建中,薛建明火电厂湿法烟气脱硫技术手册!M∀北京:中国电力出版社,2006!3∀王少辉石灰石/石膏湿法烟气脱硫的水平衡问题探讨!J∀环境污染与防治,2008(8):82-83转89!4∀蒋文举,赵君科,尹华强,汤争光,等烟气脱硫脱硝技术手册!M∀化学工业出版社,200764