有毒有害气体检测安全技术

1 %VOLLFL%VOLLEL%LFL%LEL%LFL / LELLFL / LELUFL%UFL%UFL / UEL?2 132?%137172.410.422.831182.814.432.5811947544.15520211.651625211.344612.574.522211.57312.5231.98.58314241.69.3916.7252.29.5103.132262.410.3113.815.42713.514.512422281.37.11310.717.4295.314143100304.920.7152.121.5313.42716614324.345LELUEL210%VOL20%VOL?3 ? 1%LEL%VOLLELLEL1001LEL = 100%LEL100%LEL = 5.3%VOL10%LEL = 0.53%VOL0.53%2%VOLppmppb1ppm = 1000ppb =1/1000000VOL10-6100%VOL = 106ppm = 109ppb10%LEL = 0.53%VOL = 53000ppm10%LEL = 0.13%VOL = 13000ppmIDHL500ppm3ppmmg/m3Vppm= Wmg/m324.46 / MVppmWmg/m3M4VnLELnUELnLEL = 100 /V1/LEL1 + V2/LEL2 + +Vn/LELn%VOLUEL = 100 /V1/UEL1 + V2/UEL2 + +Vn/UELn%VOL80%VOLLEL=5.315%VOLLEL=3.04%VOLLEL=2.21%VOLLEL=1.9LEL= 100 /805.3 + 15/3.0 + 4/2.2 + 1/1.9= 4.46%VOL?4 IECGB3836.14-2000140? 1? 2? 012NEC120?IEC 01NEC 1IEC 2NEC 2?IECNECCLASS 0Div. 112Div. 2CLASS/10Div. 12Div. 2IECZoneNECDivision?4 123iaibiaia100mAibib150mAia01ib1 5 ?1dGB3836.2Zone1Zone22eGB3836.3Zone1Zone23iaGB3836.4Zone02ibGB3836.44pGB3836.5Zone1Zone25oGB3836.6Zone1Zone26qGB3836.7Zone1Zone27nGB3836.8Zone28mGB3836.9Zone1Zone29hGB3836.10Zone1Zone2?6 ?mJ0.280A0.180B0.060C0.019? ?7 1ExiaCT6? Exiaia0CCT685? ?ExiaC? Exiaia0CC2ExdExibExiaExdibExdiaExeExeib? NIOSH?m%m%1.520.54.06.52.020.05.04.03.014.0?12.23m35%234?LEL33121?ppmppm050011500010015000200.11500250110000501200010011000100.130VOC050000.1-VOCLEL100%LEL?1234LEL1.3%LEL2.8LEL30%LEL10%LEL=10%1.3%2.8=36400ppmIDHL500pmm70LEL10l%LEL?17.5m15m2m1m15m2m5mlm15m7.5m1ma b 0.3-0.6m0.97kg/m30.97kg/m30.5-2m2