Yuav luag tag nrho cov combustible gases tuaj yeem tshawb pom siv cov sensors raws li txoj cai catalytic combustion.
Nyob rau hauv cov chaw uas muaj ntau yam combustible gases, xaiv ib tug combustible gas alarm yuav tsum tau saib xyuas kev nyab xeeb thiab npog qhov nruj tshaj plaws tej yam kev mob. Nws raug nquahu kom ua qhov tseem ceeb tshaj plaws - lub hom phiaj catalytic combustion sensor ceeb toom uas tuaj yeem teb rau ntau cov roj hluav taws xob, siv cov roj nrog qhov qis qis qis qis (LEL) raws li qhov ntsuas ntsuas thiab lub tswb ntsuas qhov ntsuas ntsuas kom paub meej cov lus ceeb toom raws sijhawm rau tag nrho cov roj hluav taws xob hluav taws xob. Ntawm no, qhov kev txwv qis qis yog hais txog LEL concentration sib haum rau qhov qis qis ntawm cov roj ntsuas; Piv txwv li, 5% VOL rau methane sib raug rau 100% LEL, thiab 4% VOL rau hydrogen sib raug rau 100% LEL.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm catalytic combustion sensor: Cov pa roj carbon monoxide nkag mus rau hauv lub sensor thiab nkag mus rau qhov tsis muaj nplaim taws nrog cov pa oxygen hauv huab cua thiab cov catalyst hauv lub sensor. Cov tshuaj tiv thaiv no ua rau muaj cua sov, ua rau qhov kub ntawm qhov ntsuas qhov ntsuas tau nce, yog li cuam tshuam rau cov nqi tiv thaiv ntawm platinum hlau. Qhov kev hloov pauv no yog ncaj qha proportional rau qhov concentration ntawm cov roj combustible. Nyob rau hauv lwm yam lus, no sensor outputs ib tug tsis kam hloov lub teeb liab raws li qhov concentration ntawm cov coj combustible gas, yog li muab ib tug qauv nkhaus.
Dab tsi yog ib co combustible gases?
1. Liquefied Petroleum Gas (LPG): Tau txais los ntawm kev ua cov roj av los yog cov roj thiab cov roj av extraction, nws cov khoom tseem ceeb yog propane, propylene, butane, thiab butene. Gaseous LPG hnyav dua li huab cua, nrog lub ntiajteb txawj nqus 1.5-2 npaug ntawm huab cua.
2. Natural Gas: Cov pa roj carbon monoxide yog cov pa roj carbon monoxide uas tsim los ntawm qhov ntev - lub sij hawm underground deposition ntawm ancient biological seem, undergoing qeeb transformation thiab metamorphic cracking. Nws yog flammable thiab feem ntau pom nyob ib sab ntawm cov roj extraction hauv cov roj teb. Natural gas yog khaws cia rau hauv cov pob zeb ntxeem tau ntawm qhov tob ntawm kwv yees li 3000-4000 meters. Nws cov khoom tseem ceeb yog methane, thiab nws kuj muaj me me ntawm ethane, butane, pentane, carbon dioxide, carbon monoxide, thiab hydrogen sulfide.
3. Methane (Gas): Primarily composed of methane, a flammable gas, colorless and odorless, sparingly soluble in water, less dense than air, and prone to explosion when mixed with oxygen or air at a certain temperature in a confined space.
4. Toluene: Toxicity: Classified as low toxicity. Toluene raug kuaj rau ob qho tib si toxicity thiab flammability (cov hom phiaj tshwj xeeb yuav tsum tau lees paub nrog tus neeg siv khoom).
5. Coal Gas: Feem ntau muaj cov pa roj carbon monoxide, hydrogen, alkanes, alkenes, thiab aromatics. Cov pa roj carbon monoxide yog tshuaj lom vim tias CO thiab aromatics tuaj yeem khi rau hemoglobin hauv cov ntshav, ua rau tsis muaj oxygen, ua rau tsis nco qab lossis tuag taus. Txawm tias muaj tsawg concentration, nws tuaj yeem ua rau kiv taub hau, xeev siab, thiab ntuav.
Nco ntsoov tias qee qhov catalytic combustion sensors tsis tuaj yeem ntes cov pa hluav taws xob xws li diesel thiab acetylene. Cov khoom tseem ceeb ntawm cov roj hluav taws xob yuav tsum tau teev ua ntej yuav khoom.