Dab tsi yog tus qauv ntau ntawm kev tshawb nrhiav roj rau cov hluav taws xob hluav taws xob hluav taws xob?
Qhov ntsuas qhov ntsuas ntawm qhov ntsuas hluav taws xob hluav taws xob hluav taws xob li cas 0-100 feem pua LEL txhais li cas?
"LEL" yog hais txog qhov kev tawg qis qis, uas yog lub ntsiab lus rau cov roj hluav taws xob. Qhov qis tshaj plaws ntawm cov pa roj combustible nyob rau hauv cov huab cua thaum nws ntsib ib tug qhib hluav taws yog hu ua qhov qis tawg txwv - hu ua "LEL". Lus Askiv: Lower
Thaum lub concentration ntawm combustible gas nyob rau hauv cov huab cua mus txog nws qis tawg txwv, peb hu rau qhov tawg txaus ntshai ntawm combustible gas ib puag ncig nyob rau hauv qhov chaw no 100 feem pua, uas yog, 100 feem pua LEL. Yog tias cov roj combustible tsuas yog nce mus txog 10 feem pua ntawm nws qhov kev txwv qis dua, peb hu rau qhov kev puas tsuaj ntawm cov roj combustible nyob rau hauv lub sij hawm no 10 feem pua LEL; Kev saib xyuas cov roj combustible hauv huab cua feem ntau ncaj qha ua rau ib puag ncig txaus ntshai ntawm cov roj combustible. degree, uas yog, qhov feem pua ntawm cov ntsiab lus ntawm cov roj combustible nyob rau hauv cov huab cua thiab nws cov kev txwv qis qis: [% LEL]; Yog li ntawd, qhov kev soj ntsuam zoo li no qee zaum hu ua "explosion detection", thiab cov khoom siv tshuaj xyuas siv kuj hu ua "explosion detection instrument".
Dab tsi yog tus qauv ntau ntawm kev tshawb nrhiav roj rau cov hluav taws xob hluav taws xob hluav taws xob?
Cov cim qhia tshwj xeeb yog raws li hauv qab no:
1. Yog tias koj siv lub ntsuas hluav taws xob tawg, qhov txwv tsis pub tawg yog lub ntsiab lus dav dav rau qhov kev txwv qis qis thiab qhov txwv qhov tawg. Qhov concentration ntawm cov roj combustible nyob rau hauv cov huab cua yuav tsuas yog tawg thaum lub concentration ntawm cov combustible gas nyob nruab nrab ntawm qhov tsawg tawg txwv thiab lub siab tawg txwv. Tsis muaj qhov tawg yuav tshwm sim hauv qab qhov kev txwv qis qis lossis siab tshaj qhov txwv kev tawg. Yog li ntawd, thaum ua tiav kev ntsuas kev tawg, lub tswb nrov ntawm lub tswb hluav taws xob hluav taws xob feem ntau tau teeb tsa qis dua 25 feem pua LEL ntawm qhov txo qis qis.
2. Yog li ntawd, cov roj combustible concentration ntawm cov khoom ntsuas yog tsawg dua los yog sib npaug li 25 feem pua ntawm cov kev txwv qis dua.
(Volume ratio, tib yam hauv qab no). (Ceeb Toom: Nws tuaj yeem nkag siab tias thaum ua qhov kev ntsuas tawg, lub tswb nrov ntawm lub ntsuas hluav taws xob hluav taws xob feem ntau tau teeb tsa qis dua 25 feem pua LEL ntawm qhov kev txwv qis dua.)
3. Yog tias siv lwm txoj kev tshuaj ntsuam xyuas, thaum qhov kev txwv qis ntawm qhov ntsuas roj lossis vapor yog ntau dua lossis sib npaug li 10 feem pua, nws cov concentration yuav tsum tsawg dua 1 feem pua; thaum qhov kev txwv qis qis qis dua 10 feem pua lossis Ntau dua lossis sib npaug li 4 feem pua, qhov concentration yuav tsum tsawg dua 0.5 feem pua; Thaum qhov kev tawg qis qis qis dua 4 feem pua thiab Ntau dua lossis sib npaug li 1 feem pua, qhov concentration ntawm lub tswb hluav taws xob hluav taws xob yuav tsum tsawg dua 0.2 feem pua. Yog tias muaj ob lossis ntau dua cov roj sib xyaw ua ke, ib qho uas muaj qhov qis qis qis qis yuav tsum yeej.
4. Qhov thib ob, yooj yim muab tso rau, cov ntsiab lus qis tshaj plaws ntawm cov roj hluav taws xob uas tuaj yeem ua rau tawg yog hu ua qhov kev tawg qis qis qis qis qis - Qib (LEL).
5.LEL tsis yog ib chav tsev, nws hais txog tus nqi, feem ntau yog hais txog qhov sib piv ntawm cov pa tawg hauv huab cua.
Tus nqi ntawm LEL tsis pom los ntawm qhov ntsuas, nws yog tus nqi sib txawv rau cov roj sib txawv hauv lub teb chaws tus qauv. Cov ntaub ntawv tso tawm ntawm lub ntsuas hluav taws xob hluav taws xob hluav taws xob tsuas yog qhia qhov concentration ntawm cov pa hluav taws xob hauv huab cua rau lub tswb. Feem ntau, cov ntsuas ntsuas ntsuas ntsuas tau cim nrog qhov ntsuas roj dab tsi. Yog tias nws yog ib qho kev ntsuas zoo, nws tsis tuaj yeem qhia tias nws yog hom roj dab tsi.
