Cov lus nug txog gas detectors
Puas tuaj yeem txhim kho cov khoom siv roj hluav taws xob tuaj yeem txuas rau hauv ob lub xaim hluav taws xob?
Tsis yog, ob lub teeb liab xaim thiab lub zog hluav taws xob sib koom tib lub xaim, muab qhov ua haujlwm siab ntawm 20ma, thaum lub sijhawm ua haujlwm tam sim no ntawm cov roj hluav taws xob hluav taws xob yog 80ma, uas tsis tuaj yeem ua tau raws li nws cov haujlwm ua haujlwm tam sim no.
Yuav ua li cas thiaj li nrhiav tau qhov zoo ntawm qhov ntsuas roj ruaj ruaj?
Raws li "Tsim Specification for Combustible thiab Toxic Gas Detection and Alarm in Petrochemical Enterprises" (SH{{0}}}), "cov kev pab them nqi kab rov tav kab rov tav ntawm 3.0.8 combustible gas detectors yuav tsum yog 7.5m sab hauv tsev thiab 15m sab nraum zoov. Nyob rau hauv thaj chaw muaj txiaj ntsig zoo, tuaj yeem teeb tsa ib lub ntsuas ntsuas, qhov kev ncua deb nruab nrab ntawm lub ntsuas roj toxic thiab qhov tso tawm yuav tsum tsis txhob siab tshaj 2m sab nraum zoov thiab 1m sab hauv tsev.
3. Dab tsi yog cov kev cai rau kev teeb tsa qhov siab ntawm cov khoom siv hluav taws xob ruaj khov kho lub tswb?
Raws li "Special Specification for Combustible and Toxic Gas Detection and Alarm in Petrochemical Enterprises" (SH{{0}}), "6.1.1 Detectors for detect combustible or toxic gases heavy than air should be installed at a qhov siab ntawm 0.3-0.6 meters ntawm pem teb (los yog pem teb).
Lus Cim: Yog tias cov pa roj ntau dua {{0}}.97kg/m3 (nyob rau hauv Standard state), nws raug suav hais tias yog cov huab cua tshwj xeeb; Gas ceev tsawg dua 0.97kg/m3 (nyob rau hauv Standard state) suav hais tias sib zog tshaj huab cua. 6.1.2 Cov cuab yeej kuaj xyuas kom pom cov nplaim hluav taws xob lossis cov pa phem uas sib zog dua huab cua yuav tsum tau teeb tsa ntawm qhov siab ntawm 0.5-2m siab tshaj qhov tso tawm
Dab tsi yog cov qauv roj siv rau calibration ntawm combustible gas detectors?
Raws li cov cai hauv "Combustible Gas Detection Alarm" (JJG693-2004):
"5.1.2.1 Cov ntaub ntawv siv roj yuav tsum zoo ib yam li cov roj sim, thiab cov khoom siv roj Isobutane lossis propane tuaj yeem siv rau General Instrument."
Lub tuam txhab siv Isobutane rau calibration.
5. Lub hauv paus ntsiab lus ntawm kev tshawb nrhiav catalytic combustion yog dab tsi?
Lub hauv paus ntsiab lus ntawm catalytic combustion yog npaj ib tug high-temperature resistant catalyst txheej nyob rau saum npoo ntawm ib tug platinum resistor. Ntawm qhov kub thiab txias, combustible gases catalyze combustion ntawm nws nto, ua rau lub kub ntawm lub platinum resistor nce. Qhov kev hloov pauv hauv qhov tsis kam yog qhov ua haujlwm ntawm qhov concentration ntawm cov pa roj carbon monoxide.
6. FS txhais li cas?
F. S yog lub ntsiab lus rau tag nrho cov nplai. Nws sawv cev qhov loj ntawm qhov ntsuas qhov ntau.
Tam sim no hom zaub cov ntxaij vab tshaus ntawm kev ua lag luam yog dab tsi thiab lawv cov yam ntxwv?
Tam sim no, muaj lub teeb-emitting diodes (LEDs), kua siv lead ua kua (LCDs), thiab organic teeb-emitting zaub (OLEDs) nyob rau hauv lub khw.
Cov pa roj dab tsi tuaj yeem kuaj xyuas cov pa roj raws li PID photoionization nrhiav kom pom txoj cai?
Photoionic gas sensors (PID) yog ib qho yooj yim thiab rhiab nrhiav txoj hauv kev los kuaj xyuas cov organic volatile compounds (VOCs), tshwj xeeb tshaj yog rau cov pa xau nrog cov concentrations tsawg, uas muaj qhov zoo sib xws piv rau lwm hom sensors. Hauv cov ntsiab lus, PID sensors feem ntau yog siv rau kev tshawb nrhiav cov organic volatile compounds (VOCs), suav nrog:
Aromatics: benzene, xylene, naphthalene, thiab lwm yam;
Saturated thiab unsaturated hydrocarbons: octane, ethylene, cyclohexane, thiab lwm yam;
Ketones, aldehydes, ethers: acetone, propanal, propyl methyl ether, thiab lwm yam;
Halogenated hydrocarbons, thiohydrocarbons, cawv, esters, hydrazine, thiab lwm yam.
Tsis tas li ntawd, cov tshuaj uas tsis muaj tshuaj lom muaj xws li arsenic thiab ammonia.
