Thaum muaj xwm ceev shut-off valve, tseem hu ua kev nyab xeeb kaw-off valve, yuav kaw sai lossis qhib thaum muaj xwm txheej ceev kom tsis txhob muaj xwm txheej. Kev kaw thaum muaj xwm txheej ceev yuav tsum tau muab tso rau ntawm cov chaw ntim tshuaj lom neeg, cov khoom siv khaws cia thiab kev thauj mus los, thiab cov kav dej thauj mus los. Thaum muaj xwm txheej ceev, cov li qub no yuav kaw ntawm lawv tus kheej yam tsis tas yuav tsum tau ua haujlwm los yog tswj hluav taws xob.
Thaum muaj xwm ceev kaw lub valve: Tshwj xeeb tsim los rau kev teeb tsa ntawm qhov nkag thiab qhov hluav taws xob cov kav dej ntawm cov kua dej hydrocarbon kheej kheej, nws tuaj yeem ceev thiab nruj kaw (TSO) thiab cais cov khoom siv hluav taws xob thiab tshuaj lom thaum muaj hluav taws xob, xau thiab lwm yam xwm txheej hauv lub tank. .
Thaum cov kua theem ntawm lub tank kheej kheej nce mus txog lossis siab tshaj qhov siab ntawm cov kua qib siab, lub valve kaw thaum muaj xwm ceev tuaj yeem siv los tiv thaiv cov khoom dhau ntawm lub tank.
Lub kaw lus kaw thaum muaj xwm txheej ceev yuav tsum muaj cov haujlwm tsis siv neeg thiab phau ntawv kaw, thiab phau ntawv kaw yuav tsum suav nrog cov chaw taws teeb tswj phau ntawv kaw hauv chav tswj thiab ntawm qhov chaw phau ntawv kaw.
(2) Tsis tas li ntawd, tseem muaj cov ntsiab lus hauv qab no hauv lwm cov ntaub ntawv thiab cov ntaub ntawv:
ESDV thaum muaj xwm ceev shutdown valve
EIV - Emergency Isolation Shutdown Valve
EBV - Emergency Block Valve
Txawm hais tias nws lub npe hu li cas, nws txoj haujlwm tsis muaj dab tsi luv ntawm ib qho. Los ntawm kev txiav tawm lossis cais tawm, nws tuaj yeem txo qhov cuam tshuam ntawm hluav taws kub ntawm cov cuab yeej tsim khoom thiab tiv thaiv kev nthuav dav ntxiv ntawm kev puas tsuaj thaum muaj hluav taws kub.
Lwm qhov yuav tsum tau ua rau lub qhov rooj kaw thaum muaj xwm txheej ceev, xws li cov kav dej, cov kev cai TSO, thiab kev tuav tswj / tsis siv neeg kaw, txhua tus ua haujlwm ua haujlwm rau qhov kev nyab xeeb ntawm hluav taws.
Hauv kev ua haujlwm niaj hnub, ntau tus neeg tsis meej pem lub qhov rooj kaw thaum muaj xwm txheej ceev uas siv rau kev sib cais hluav taws nrog lub kaw-off valve siv rau kev nyab xeeb interlocking SIS.
Qhov tseeb, lub kaw lus kaw thaum muaj xwm txheej ceev EBV yog qhov sib txawv ntawm lub kaw-off valve siv rau kev sib cuam tshuam hauv SIS.
Cov li qub hauv SIS yog tsim los txo cov kev pheej hmoo thiab ua haujlwm ua ntej muaj kev phom sij. Lawv muaj kev nyab xeeb thiab kev nyab xeeb uas yuav tsum tau ua (ntau yam hauv SRS), tab sis tsis muaj kev tiv thaiv hluav taws hauv kev tsim qauv; Lub valve kaw thaum muaj xwm txheej ceev ntawm no muaj cov qauv kev tiv thaiv hluav taws uas tsim los ntawm API, uas yog kev ua haujlwm uas tuaj yeem ua tiav qhov kev puas tsuaj thaum muaj hluav taws kub. Raws li seb puas yuav siv BPCS lossis SIS cuam tshuam, nws yuav tsum tau txiav txim siab raws li kev txheeb xyuas cov txiaj ntsig ntawm HAZOP thiab LOPA nrog lossis tsis muaj SIF.
Q1: Puas yog lub kaw lus kaw thaum muaj xwm txheej ceev yog phau ntawv qhia lossis lub valve tsis siv neeg?
A: Raws li T/CCSAS023-2022 "Specification for the Setting and Use of Emergency Shutoff Valves in Hazardous Chemical Enterprises", cov txheej txheem kaw thaum muaj xwm ceev tau muab faib ua phau ntawv ntawm qhov chaw ua haujlwm li qub (Class I), lub hwj chim rau -site ua haujlwm li qub (Class II), thiab lub zog ntawm qhov chaw thiab chaw taws teeb tswj li qub (Class III). Thaum tsis muaj qhov yuav tsum tau ua nyob deb ntawm kev teeb tsa, lub kaw lus kaw thaum muaj xwm txheej ceev feem ntau yog Class III li qub.
Q2: Dab tsi yog daim ntawv ntawm kev kaw thaum muaj xwm txheej ceev?
A: Raws li T/CCSAS023-2022 6.2.1, lub rooj vag li qub, pob li qub, thiab npauj npaim li qub tuaj yeem raug xaiv rau lub qhov rooj kaw thaum muaj xwm txheej ceev, thiab lub ntiaj teb li qub yuav tsum tsis txhob siv.
Q3: Puas tuaj yeem kaw qhov xwm txheej ceev li qub?
A: Raws li kev tsim khoom ib txwm muaj, lub valve kaw thaum muaj xwm txheej ceev yuav tsum nyob rau hauv ib txwm qhib lub xeev. Cov lag luam uas siv cov khoom kaw thaum muaj xwm txheej ceev yuav tsum tsis txhob siv lawv ua cov haujlwm ua haujlwm txhua hnub.
Q4: Kev teeb tsa yuav tsum muaj rau kev kaw thaum muaj xwm txheej ceev hauv thaj chaw tank?
A: Lub valve kaw thaum muaj xwm ceev nyob rau hauv lub tank cheeb tsam yuav tsum nyob ze ntawm lub hauv paus ntawm lub tank cia, thiab thaum muaj ib tug saj zawg zog kev twb kev txuas, nws yuav tsum tau teem rau nruab nrab ntawm lub tank thiab hloov tau yooj yim kev twb kev txuas.
