Yuav ua li cas siv tshuaj lom thiab teeb meem roj ntes hauv kev lag luam?
Nyob rau hauv qhov tseeb, ntau gases ntsib nyob rau hauv kev nyab xeeb thiab noj qab haus huv yog sib tov ntawm organic thiab inorganic gases. Vim muaj ntau yam laj thawj, peb txoj kev nkag siab tam sim no ntawm cov pa phem thiab cov pa phem tseem tsom mus rau cov pa roj carbon monoxide, cov pa roj uas tuaj yeem ua rau muaj kev phom sij txaus ntshai (xws li hydrogen sulfide thiab hydrogen cyanide), nrog rau qee yam tshuaj lom neeg kuaj pom (xws li carbon monoxide. ) thiab oxygen. Yog li, tsab xov xwm no yuav ua ntej tsom mus rau kev qhia txog cov cuab yeej no thiab muab cov lus qhia rau kev siv ntau yam tshuaj lom thiab teeb meem (inorganic / organic) gas detectors raws li qhov xwm txheej tam sim no.
Kev faib tawm ntawm cov tshuaj lom thiab teeb meem roj ntes thiab cov khoom tseem ceeb ntawm lub tshuab ntes yog cov roj sensors.
Gas sensors tuaj yeem muab faib ua peb pawg hauv txoj cai:
A) Gas sensors siv lub cev thiab tshuaj lom neeg, xws li hom semiconductor (sov tswj, ntim tswj, hom muaj peev xwm nto), hom catalytic combustion, khoom thermal conductivity hom, thiab lwm yam.
B) Gas sensors uas siv lub cev muaj zog, xws li thermal conductivity, optical cuam tshuam, infrared absorption, thiab lwm yam.
C) Gas sensors siv cov khoom siv hluav taws xob, xws li lub peev xwm electrolysis, Gavanni roj teeb, membrane ion electrode, tsau electrolyte, thiab lwm yam.
Raws li cov kev phom sij, peb faib cov pa phem thiab cov pa phem rau hauv ob pawg: cov pa hluav taws xob thiab cov pa phem.
Vim lawv cov khoom sib txawv thiab kev phom sij, lawv txoj kev tshawb nrhiav kuj sib txawv.
Combustible gases yog cov pa phem tshaj plaws uas tau ntsib nyob rau hauv kev lag luam chaw xws li petrochemicals, feem ntau organic gases xws li alkanes thiab tej yam inorganic gases xws li carbon monoxide. Kev tawg ntawm combustible gases yuav tsum tau raws li tej yam kev mob, xws li: ib tug tej yam concentration ntawm combustible gases, ib tug npaum li cas ntawm cov pa oxygen, thiab txaus tshav kub rau ignite lawv ignition qhov chaw. Cov no yog peb lub ntsiab ntawm kev tawg (raws li qhia hauv daim duab peb sab tawg nyob rau sab laug daim duab saum toj no), tag nrho cov no yog qhov tseem ceeb. Hauv lwm lo lus, qhov tsis muaj ib qho ntawm cov xwm txheej no yuav tsis ua rau hluav taws kub thiab tawg. Thaum cov roj hluav taws xob (steam, plua plav) thiab cov pa oxygen sib xyaw thiab ncav cuag ib qho concentration, qhov tawg yuav tshwm sim thaum ntsib qhov hluav taws kub nrog qee qhov kub. Peb xa mus rau qhov concentration ntawm combustible gases uas tuaj yeem tawg thaum lawv los rau hauv kev sib cuag nrog qhov hluav taws kub raws li qhov tawg concentration txwv, abbreviated li qhov tawg txwv, uas yog feem ntau qhia nyob rau hauv%. Qhov tseeb, qhov sib xyaw no tsis tas yuav tawg hauv qhov sib xyaw ua ke thiab yuav tsum muaj qhov sib txawv.
