Shenhai Explosion-Proof
Kev kuaj txheem kuaj cov mob, Tus concentration txwv ntawm uas ib combustible roj los yog vapor sib xyaw nrog ib oxidizing roj ua rau ib tawg yog termed raws li tus tawg txwv. feem ntau, Lub sij hawm 'tawg txwv’ xa mus rau lub concentration txwv ntawm combustible gases los yog vapors nyob rau saum cua. Qhov tsawg tshaj plaws concentration ntawm ib combustible roj uas yuav ua tau ib tawg yog hu ua tus tawg tawg (LEL), thiab lub siab concentration li tus tawg tawg txwv (UEL).
Thaum combustible gases los yog kua vapors yog tsis pub dhau lub tawg txwv thiab encounter ib qhov chaw kub (xws li ib tug nplaim taws los yog siab txias), Nplaim taws ceev ceev kis los ntawm cov roj los yog hmoov av. Qhov tshuaj tiv thaiv no tso ib qhov teeb meem loj ntawm tshav kub kub, generating gases uas nthuav vim tshav kub kub, tsim muaj peevxwm thiab pressures nrog immense destructive tej zaum.
Tawg txwv yog qhov tseem ceeb parameters nyob piav cov hazards ntawm qhov khuv nkev, vapors, thiab combustible plua plav. feem ntau, Tus tawg txwv ntawm flammable gases thiab vapors yog expressed ua ib feem pua ntawm cov roj los yog vapor hauv lub mixture.
piv txwv li, Ntawm 20°C, Cov conversion formula rau lub volumetric feem thiab huab hwm coj concentration ntawm ib flammable roj yog:
Y = (L/100) × (1000M/22.4) × (273/(273+20)) = L × (M/2.4)
Nyob rau hauv cov mis mos no, L yog tus volumetric feem (%), Y yog cov huab hwm coj concentration (g/m³), M yog tus txheeb ze molecular huab hwm coj ntawm cov combustible roj los sis vapor, Thiab 22.4 qhov ntim (txiv kab lus) nyob ntawm 1 mol ntawm tej yam khoom nyob rau hauv lub xeev gaseous nyob rau hauv cov qauv kawm (0°C, 1 noj).
Piv txwv, Yog hais tias cov roj methane concentration nyob rau hauv cov cua yog 10%, nws converts rau:
Y = L × (M/2.4) = 10 × (16/2.4) = 66.67g/m³
Lub tswvyim ntawm tawg txwv rau flammable gases, vapors, Thiab plua plav yuav piav los ntawm qhov kev tshawb xav ntawm lub tawg. Yog hais tias cov concentration ntawm ib flammable roj, vapor, plua plav yog hauv qab no cov LEL, vim cov huab cua tshaj plaws, txias nyhuv ntawm tej huab cua, thiab insufficient concentration ntawm lub combustible, Lawv loses ntau tshaj nws nreg, thiab cov tshuaj tiv thaiv tsis proceeded. mob(nurses), zoo ib yam li, Yog hais tias tus concentration saum lub UEL, Lub tshav kub generated yog tsawg tshaj li tus tshav kub poob lawm, tiv thaiv kom tsis txhob muaj qhov tshuaj tiv thaiv. txuas ntxiv, Excessive combustible roj los yog plua plav tsis zoo xwb hnov mob thiab ua kom muaj cua kub vim tsis muaj pa roj carbon monoxide Tiam sis kuj txias cov mixture, tiv thaiv kom txhob kis tau tus kab mob nplaim taws. ntxiv thiab, tej yam khoom xws li ethylene oxide, nitroglycerin, thiab combustible plua plav xws li gunpowder, UEL yuav ncav cuag 100%. Cov ntaub ntawv no muab lawv cov pa thaum decomposition, tas cov tshuaj tiv thaiv mus ntxiv. Ntau zog siab thiab kub ntxiv facilitate lawv decomposition thiab tawg.