Hom thiab Cov Cai Ua Haujlwm ntawm Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob
Thaum ntsib cov pa phem, peb tuaj yeem faib lawv ua ob pawg raws li lawv cov kev phom sij: cov pa roj carbon monoxide thiab cov pa phem. Vim lawv cov khoom sib txawv thiab kev phom sij, lawv txoj kev tshawb nrhiav kuj sib txawv. Toxic Gas Detector yog cov cuab yeej tshawb nrhiav kev tshaj lij. Combustible gases yog cov pa phem uas feem ntau ntsib nyob rau hauv kev lag luam chaw xws li petrochemicals, feem ntau muaj cov organic gases xws li alkanes thiab tej yam inorganic gases xws li carbon monoxide. Kev tawg ntawm combustible gases yuav tsum tau tej yam kev mob, thiab combustible gases yog cov pa phem feem ntau ntsib nyob rau hauv industrial chaw xws li petrochemicals. Qhov ntawd yog qee qhov concentration ntawm cov pa roj combustible, ib qho nyiaj ntawm cov pa oxygen, thiab cov cua sov txaus rau ignite nws qhov hluav taws kub. Cov no yog peb lub ntsiab lus tseem ceeb ntawm kev tawg, thiab tsis muaj ib qho tseem ceeb. Hauv lwm lo lus, qhov tsis muaj ib qho ntawm cov xwm txheej no yuav tsis ua rau hluav taws kub lossis tawg. Thaum cov pa combustible vapor, plua plav, thiab oxygen sib xyaw thiab ncav cuag ib qho concentration, lawv yuav tawg thaum raug hluav taws kub nrog qee qhov kub. Qhov concentration ntawm cov pa roj combustible tuaj yeem tawg thaum raug hluav taws kub yog hu ua explosive concentration limit, abbreviated as the explosive limit, thiab feem ntau qhia hauv%. Qhov tseeb, qhov sib tov no tsis tawg ntawm ib qho kev sib xyaw ua ke thiab yuav tsum muaj qhov sib txawv. Thaum lub concentration ntawm cov roj combustible yog qis dua LEL yam tsawg kawg nkaus txwv txwv, tsis muaj cov roj combustible concentration, thiab thaum nws concentration siab tshaj UEL qhov siab tshaj plaws tawg txwv, tsis muaj oxygen yuav tsis ua rau tawg. Lub LEL thiab UEL ntawm cov roj hluav taws xob sib txawv sib txawv. Thov xa mus rau qhov kev taw qhia nyob rau hauv yim qhov teeb meem rau lub ntsiab lus no, uas yuav tsum tau coj mus rau hauv tus account thaum calibrating instruments. Rau cov laj thawj kev nyab xeeb, feem ntau kuv yuav tsum tau tshaj tawm lub tswb thaum lub siab ntawm cov roj hluav taws xob nyob ntawm LEL 10% thiab 20%, ntawm no hu ua 10% LEL. Ua kev ceeb toom ceeb toom, thaum 20% LEL hu ua kev ceeb toom txaus ntshai. Qhov no yog vim li cas lub combustible gas detector kuj hu ua LEL detector. Kev faib tawm thiab kev ua haujlwm ntawm cov pa roj carbon monoxide detectors: A) Gas sensors uas siv lub cev thiab tshuaj lom neeg, xws li hom semiconductor (surface control type, volume control type, deg potential type), catalytic combustion type, solid thermal conductivity type, etc. B) Gas sensors siv lub cev xws li thermal conductivity, optical interference, infrared absorpil, etc. Raws li qhov muaj peev xwm electrolysis, galvanic cell, diaphragm ion electrode, tsau electrolyte, thiab lwm yam.
