1. Lub hauv paus ntsiab lus ntawm kev tiv thaiv tawg
○ 1 Kev tawg yog thaum muaj teeb meem hloov pauv ntawm ib lub xeev, dhau ntawm lub cev lossis tshuaj hloov pauv, mus rau lwm lub xeev tam sim ntawd, thiab tso tawm lub zog loj. Lub zog tso tawm ntawm qhov nrawm nrawm yuav ua rau cov khoom nyob ib puag ncig cuam tshuam thiab rhuav tshem.
Lub tswvyim ntawm kev tawg:
○ 21) Cov khoom tawg: cov khoom uas tuaj yeem hnov mob nrog oxygen (cua), nrog rau cov pa roj, kua thiab cov khoom khib nyiab. (Gas: hydrogen, acetylene, methane, thiab lwm yam.; kua: cawv, roj av; khoom: plua plav, fiber ntau plua plav, thiab lwm yam) Peb yuav tsum tau ua kom tiav rau qhov tawg:
2) Oxygen: Cua.
3) Ignition qhov chaw: suav nrog qhib nplaim taws, hluav taws xob spark, mechanical spark, electrostatic spark, kub, tshuaj tiv thaiv, lub teeb lub zog, thiab lwm yam.
2. Vim li cas tawg-pov thawj: Cov khoom tawg: Ntau qhov chaw tsim khoom yuav tsim qee yam khoom siv hluav taws xob. Kwv yees li ob feem peb ntawm cov mines underground coal mines muaj cov khoom tawg; Hauv kev lag luam tshuaj, ntau tshaj 80 feem pua ntawm cov chaw ua haujlwm tsim khoom muaj cov khoom tawg.
Oxygen: Cov pa oxygen hauv huab cua yog ubiquitous.
Ignite qhov chaw:
Hauv cov txheej txheem tsim khoom, ntau cov cuab yeej hluav taws xob tau siv, thiab ntau yam kev sib txhuam ntawm cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, hluav taws xob hluav taws xob, thiab qhov kub thiab txias yog qhov tseem ceeb, tshwj xeeb tshaj yog thaum cov twj paj nruag thiab hluav taws xob tsis ua haujlwm. Objectively, ntau qhov chaw ua haujlwm tau ntsib cov xwm txheej tawg. Thaum qhov sib xyaw ua ke ntawm cov khoom tawg thiab cov pa oxygen nyob rau hauv qhov kev txwv tawg, qhov tawg yuav tshwm sim yog tias muaj qhov tawg. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau ua pov thawj tawg.
Dab tsi yog qhov txawv ntawm ExdⅡB T4 thiab ExdⅡC T4 nyob rau hauv cov ntaub ntawv pov thawj tawg
Qhov txawv ntawm Ex(ia)ⅡC T4 thiab ExdⅡB T4 Qhov no yog ib txwm muaj qib siab ntawm IIC.
Ex-----Cov ntawv sau ua lus Askiv tawg,
Cov ntaub ntawv pov thawj tawg d------ daim ntawv pov thawj tawg, "d" yog hais txog hom tawg-pov thawj, uas tuaj yeem ntsia tau rau hauv cheeb tsam 1-2, ia-theem intrinsically muaj kev nyab xeeb tawg-pov thawj txoj kev, tuaj yeem ntsia tau nyob rau hauv cheeb tsam 0-2 IIC---- tawg-pov thawj qib faib, feem ntau muab faib rau hauv Chav Kawm I (tsuas yog mining) thiab Class II (lub Hoobkas). Chav II ntxiv rau: IIA, IIB, IIC
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