Cov hom gases uas cov cuab yeej siv roj feem ntau yuav tsum tau kuaj xyuas feem ntau yog muab faib ua peb pawg: cov roj hluav taws xob hluav taws xob, cov pa phem thiab VOC (volatile organic compounds).
Combustible gas feem ntau ntsib hauv kev siv. Lub tswv yim ntawm cov roj combustible txhais tau hais tias nws tuaj yeem sib xyaw nrog huab cua (lossis oxygen) nyob rau hauv ib qho kev concentration ntau los tsim cov roj premixed. zog gas.
Xws li gases yog ubiquitous nyob rau hauv kev ua hauj lwm ib puag ncig ntawm petrochemical thiab chemical manufacturing industries. Peb cov combustible gases yog hydrogen (H2), methane (CH4), ethane (C2H6), propane (C3H8), butane (C4H10), ethylene (C2H4), propylene (C3H6), butene (C4H8), acetylene (C2H2), propylene (C3H4), butyne (C4H6), thiab lwm yam.
Toxic gas yog ib qho roj uas ua rau tib neeg lub cev muaj kev phom sij thiab tuaj yeem ua rau muaj tshuaj lom. Nws yog feem ntau muab faib ua cov pa roj (xws li cov roj uas ua rau lub qhov muag ua rau lub qhov muag thiab cov pa ua pa) thiab cov pa roj asphyxiating (xa mus rau cov roj uas tuaj yeem ua rau hypoxia hauv lub cev. Cov pa roj carbon dioxide tuaj yeem muab faib ua cov pa roj asphyxiating yooj yim, ntshav. asphyxiating gas thiab cell asphyxiating gas), cov roj no tuaj yeem ua rau tib neeg lub cev raug mob thiab tseem txaus ntshai heev. Cov pa roj carbon monoxide (CO) thiab hydrogen sulfide. (H2S), ammonia (NH3), chlorine (CL2), sulfur dioxide (SO2), nitrogen dioxide (NO2), nitric oxide (NO), carbon dioxide (CO2), thiab lwm yam.
Lub tswv yim ntawm VOC yog cov kua organic los yog cov khoom uas tuaj yeem tsim kho raws li qhov kub thiab txias, feem ntau hu ua cov kuab tshuaj organic. Cov khoom siv dav dav tuaj yeem ntes roj av, diesel, benzene, roj av, xim, thiab lwm yam.
Paub meej tias hom thiab concentration ntau ntawm cov pa yuav tsum tau kuaj:
Cov hom gases ntsib los ntawm txhua qhov chaw tsim khoom sib txawv. Txhua yam tshwm sim yuav tsum tau txiav txim siab thaum xaiv. Piv txwv li, nyob rau hauv lub mining ib puag ncig ntawm thee mines, methane thiab tsawg toxic alkanes yog feem ntau, yog li nws yog undoubtedly tsim nyog xaiv ib tug combustible gas detector. Qhov no tsis yog tsuas yog vim hais tias lub hauv paus ntsiab lus ntawm kev tshawb nrhiav cov roj combustible yog qhov yooj yim thiab siv dav, tab sis nws kuj muaj cov yam ntxwv ntawm kev saib xyuas yooj yim thiab calibration. Yog tias muaj cov pa phem xws li cov pa roj carbon monoxide thiab hydrogen sulfide, nws yog ib qho tsim nyog yuav tsum xaiv lub tshuab hluav taws xob uas tuaj yeem tshawb xyuas cov pa roj carbon monoxide, hydrogen sulfide thiab oxygen tib lub sijhawm kom muaj kev nyab xeeb ntawm cov neeg ua haujlwm.
