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關鍵詞:鍋爐;安全閥;故障

安全閥是一種非常重要的保護用閥門,廣泛地用在各種壓力容器和管道系統上,當受壓系統中的壓力超過規定值時,它能自動打開,把過剩的介質排放到大氣中去,以保證壓力容器和管道系統安全運行,防止事故的發生,而當系統內壓力回降到工作壓力或略低于工作壓力時又能自動關閉。安全閥工作的可靠與否直接關系到設備及人身的安全,所以必須給予重視。

一、閥門漏泄

zaishebeizhengchanggongzuoyalixia,fabanyufazuomifengmianchufashengchaoguoyunxuchengdudeshenlou,anquanfadexieloubudanhuiyinqijiezhisunshi。lingwai,jiezhidebuduanxielouhuanhuishiyingdemifengcailiaozaodaopohuai,danshi,changyongdeanquanfademifengmiandoushijinshucailiaoduijinshucailiao,suiranliqiuzuodeguangjiepingzheng,danshiyaozaijiezhidaiyaqingkuangxiazuodaojueduibulouyeshifeichangkunnande。yinci,duiyugongzuojiezhishizhengqideanquanfa,zaiguidingyalizhixia,ruguozaichukouduanrouyankanbujian,yetingbuchuyoulouxie,jiurenweimifengxingnengshihegede。

二、閥體結合面滲漏

zhishangxiafatijianjiehemianchudeshenlouxianxiang,zaochengzhezhonglouxiedezhuyaoyuanyinyouyixiajigefangmian:yishijiehemiandeluoshuanjinlibugouhuojinpian,zaochengjiehemianmifengmianbuhao。ershifatijiehemiandechixingmifengdianbufuhebiaozhun。sanshifatijiehemiandepingmiandutaichahuobeiyingdezazhidianzhuzaochengmifengshixiao。

三、沖量安全閥動作后主安全閥不動作

zhezhongxianxiangtongchangbeichengweizhuanquanfadejudong。zhuanquanfajudongduiyunxingzhongdeguolulaishuoweihaishifeichangdade,shizhongdadeshebeiyinhuan,yanzhongyingxiangshebeideanquanyunxing,yidanyunxingzhongdeyalirongqijiguanluzhongdejiezhiyalichaoguoedingzhishi,zhuanquanfabudongzuo,shishebeichaoyayunxingjiyizaochengshebeisunhuaijizhongdashigu。

四、沖量安全閥回座后主安全閥延遲回座時間過長

fashengzhezhongguzhangdezhuyaoyuanyinyouyixialianggefangmian:

yifangmianshi,zhuanquanfahuosaishidelouqiliangdaxiao,suiranchonglianganquanfahuizuole,dancunzaiguanluzhongyuhuosaishizhongdezhengqideyalirenghengao,tuidonghuosaixiangxiadelirenghenda,suoyizaochengzhuanquanfahuizuochihuan。xiaochuzhezhongguzhangdefangfazhuyaotongguokaidajieliufadekaiduhejiadajieliukongjingjiayijiejue,jieliufadekaidukaidayujieliukongjingdezengjiadoushiliuzaimochongguanneidezhengqixunsupaifangdiao,congerjiangdilehuosaineideyali,shiqizuoyongzaihuosaishangxiangxiayundongdetuilixunsujianxiao,faxinzaijiqilianxiangneizhengqijiezhixiangshangdetuilihezhuanquanfazishendanhuangxiangshangdelalizuoyongxiaxunsuhuizuo。

lingyifangmianyuanyinjiushizhuanquanfadeyundongbujianyugudingbujianzhijiandemocaliguodayehuizaochengzhuanquanfahuizuochihuan,jiejuezhezhongwentidefangfajiushijiangzhuanquanfayundongbujianyugudingbujiandepeihejianxikongzhizaibiaozhunfanweinei。

五、安全閥的回座壓力低

anquanfahuizuoyalididuiguoludejingjiyunxingyouhendaweihai,huizuoyaliguodijiangzaochengdaliangdejiezhichaoshipaifang,zaochengbubiyaodenengliangsunshi。zhezhongguzhangduofashengzai 200mw jizusuoshiyongde a49h xingdanhuangmochonganquanfashang,fenxiqiyuanyinzhuyaoshiyouyixiajigeyinsuzaochengde:

yishidanhuangmochonganquanfashangzhengqidepaixieliangda,zhezhongxingshidechonglianganquanfazaikaiqihou,jiezhibuduanpaichu,tuidongzhuanquanfadongzuo。

zaochenghuizuoyalididedieryinsushi:faxinyudaoxiangtaodepeihejianxibushidang,peihejianxipianxiao,zaichonglianganquanfaqizuohou,zaicibuweishunjianjieliuxingchengjiaogaodedongnengyaliqu,jiangfaxintaigao,yanchihuizuoshijian,dangrongqineijiangdaojiaodishi,dongnengyaliqudeyalijianxiao,chongliangfahuizuo。

xiaochuzhezhongguzhangdefangfashirenzhenjianchafaxinjidaoxiangtaogebufenchicun,peihejianxiguoxiaoshi,jianxiaofabanmifengmianzhiwangshifabanzuqimaozhijinghuozengjiafabanyudaoxiangtaozhijianjingxiangjianxi,laizengjiagaibuweidetongliumianji,shizhengqiliujingshibuzhiyuguofenjieliu,ershijubuyalishenggaoxingchenghengaodedongnengyaliqu。

zaochenghuizuoyalididelingyigeyuanyinjiushigeyundonglingjianmocalida,youxiebuweiyoukase,jiejuefangfajiushirenzhenjianchageyundongbujian,yangeanjianxiubiaozhunduigebujianjinxingjianxiu,jianggebujiandepeihejianxidiaozhengzhibiaozhunfanweinei,xiaochukasedekenengxing。

六、安全閥的頻跳

pintiaozhideshianquanfahuizuohou,daiyalishaoyishenggao,anquanfayoujiangkaiqi,fanfujicichuxian,zhezhongxianxiangchengweianquanfade“pintiao”。anquanfajixietexingyaoqiuanquanfazaizhengdongzuoguochengzhongdadaoguidingdekaiqigaodushi,buyunxuchuxiankazu、zhenzhanhepintiaoxianxiang。fashengpintiaoxianxiangduianquanfademifengjiweibuli,jiyizaochengmifengmiandexielou。fenxiyuanyinzhuyaoyuanquanfahuizuoyalitaigaoyouguan,huizuoyalijiaogaoshi,rongqineiguoshengdejiezhipaifangliangjiaoshao,anquanfayijinghuizuole,dangyunxingrenyuandiaozhengbudang,rongqineiyaliyouhuihenkuaishengqilai,suoyiyouzaochenganquanfadongzuo,xiangzhezhongqingkuangketongguokaidajieliufadekaidudefangfayuyixiaochu。jieliufakaidahou,tongwangzhuanquanfahuosaishineideqiyuanjianshao,tuidonghuosaixiangxiayundongdelijiaoxiao,zhuanquanfadongzuodejilvjiaoxiao,congerbimianlezhuanquanfalianxuqidong。

七、安全閥的顫振

anquanfazaipaifangguochengzhongchuxiandedoudongxianxiang,chengqiweianquanfadezhanzhen,zhanzhenxianxiangdefashengjiyizaochengjinshudepilao,shianquanfadejixiexingnengxiajiang,zaochengyanzhongdeshebeiyinhuan,fashengpozhendeyuanyinzhuyaoyouyixiajigefangmian:

yifangmianshifamendeshiyongbudang,xuanyongfamendepaifangnenglitaida(xiangduiyubixupaifangliangeryan),xiaochudefangfashiyingdangshixuanyongfamendeedingpailiangjinkenengjiejinshebeidebixupaifangliang。

lingyifangmianshiyouyujinkouguandaodekoujingtaixiao,xiaoyufamendejinkoutongjing,huojinkouguanzulitaida,xiaochudefangfashizaifamenanzhuangshi,shijinkouguanneijingbuxiaoganfamenjinkoutongjinghuozhejianshaojinkouguandaodezuli。paifangguandaozuliguoda,zaochengpaifangshiguodadebeiyayeshizaochengfamenzhanzhendeyigeyinsu,keyitongguojiangdipaifangguandaodezulijiayijiejue。

muqiandianzhanguoluanquanfadoushiyouzhu、fufapeitaozucheng,bingcaiyongjixieheregongkongzhishuangzhongbaohu,youxieguzhangbuyifasheng,danchongfenzhangwoanquanfachangjianguzhangyuanyinhexiaochufangfa,guzhangfashengshichuliqilaicainengdexinyingshou,duibaozhengshebeianquanyunxingyouzhuzhongyaoyiyi。


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下一篇:安全閥的故障消除、維護和檢查
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