Raws li lub zog huv thiab muaj txiaj ntsig zoo, roj roj (feem ntau yog cov pa roj carbon monoxide) tau siv dav hauv cov haujlwm xws li kev ua neej nyob, kev tsim khoom, kev tsim hluav taws xob, thiab kev thauj mus los. Nws cov khoom tseem ceeb, methane (CH₄), yog nplaim taws thiab tawg; concentrations ntawm 5% thiab 15% hauv huab cua tuaj yeem ua rau tawg thaum sib cuag nrog cov nplaim taws qhib.EX Gas Detectoryog yuav tsum. Nrog rau kev nthuav dav txuas ntxiv ntawm cov kav dej hauv nroog hauv nroog thiab qhov teeb meem loj zuj zus ntawm cov txheej txheem kev laus, kev nyab xeeb roj tau dhau los ua kev txhawj xeeb loj rau pej xeem.
1.Key daim ntawv thov scenarios nyob rau hauv lub combustible gas kev lag luam muaj xws li:
Cov kav dej hauv nroog hauv nroog: Kev sib kis thiab kev sib faib khoom siv npog thaj chaw nyob thiab kev lag luam
Lub nroog rooj vag chaw nres tsheb thiab chaw nres tsheb / chaw faib khoom: Chaw txais roj thiab chaw cia khoom
Cov neeg siv khoom lag luam: loj- cov neeg siv khoom loj xws li cov chaw tsim khoom thiab cov chaw tsim hluav taws xob
LNG / LPG cov chaw: Chaw cia khoom thiab cov khoom siv roj rau Liquefied Natural Gas (LNG) thiab Liquefied Petroleum Gas (LPG)
2. Cov ntsiab lus txaus ntshai rau cov pa xau rau hauv qhov chaw
(1). Flange kev sib txuas: Aging gaskets, xoob bolts; cov dej me me yog qhov nyuaj rau kev txheeb xyuas
Valve seals: Ntim hnav, valve qia corrosion; Cov dej xau tuaj yeem tshwm sim nyob rau hauv ob qho tib si atmospheric thiab pressurized.
(2). Chaw nres tsheb cov chaw: Cov chaw xws li LNG gasification chaw nres tsheb thiab lub nroog rooj vag chaw nres tsheb muaj ntau cov kav dej, li qub, thiab cov cuab yeej siv, uas ua rau muaj qhov ntom ntom ntawm cov ntsiab lus xau. LNG/CNG siab tswj chaw nres tsheb, tshwj xeeb tshaj yog, muaj kev pheej hmoo siab dua ntawm kev xau vim kev teeb tsa sab nraum zoov thiab ntev - lub sijhawm ua haujlwm tsis muaj neeg saib xyuas.
3. Direct detection technologies
(1). Catalytic combustion sensor; muaj peev xwm ntes tau 0-100% LEL (Lower Explosive Limit).
(2). Laser methane detection (TDLAS): Siv cov methane nqus cov yam ntxwv ntawm cov laser wavelengths.
(3). Optical Gas Imaging (OGI): Siv cov thev naus laus zis thev naus laus zis thev naus laus zis kom pom cov pa roj.
4. Cov kev daws teeb meem hauv online gas leak xyuas:
Tsau lpg gas detectors ua ke nrog cov tswj vaj huam sib luag, kev koom ua ke nrog huab platforms, PLCs, lossis BMS (Lub Tsev Tswj Xyuas Lub Tsev) kom muaj kev sib txuas lus wireless, nrhiav qhov chaw, thiab kev sib txuas ua haujlwm.
5. Daim ntawv thov rau lpg roj ntes tau ruaj khov.
Tsau roj ntes yog cov khoom tseem ceeb ntawm kev saib xyuas online hauv kev lag luam roj. Ua haujlwm tsis tu ncua nyob ib ncig ntawm lub moos, lawv saib xyuas ambient combustible gas concentrations (feem ntau methane) hauv lub sijhawm. Thaum cov kev xav tau nce mus txog qhov pib lub tswb, lawv ua rau lub suab nrov thiab pom lub tswb thiab qhib cov cuab yeej kev nyab xeeb xws li lub tshuab ua pa thiab kaw - tawm li qub.
Tsis zoo li cov cuab yeej ntes tau los yog lub tsheb kuaj xyuas, cov cuab yeej ruaj khov tau teeb tsa rau ntawm qhov tshwj xeeb siab - qhov chaw muaj kev pheej hmoo, ua raws li "cov tub ceev xwm ruaj" nyob rau hauv lub network saib xyuas kom muaj kev soj ntsuam tas li ntawm thaj chaw tseem ceeb.
Tsau lpg gas detector tso zis teeb liab (piv txwv li, 4-20mA / RS485) → Xa mus rau lub tswb ntsuas hluav taws xob → Local audible/visual alarm triggered at alarm setpoint → PLC/DCS system → Interlocking with shut-off valves and fans → Monitoring platform (SCADA / Cloud neeg ua hauj lwm platform)