化工设计竞赛SITE,DATA乙醛储罐蒸汽云(0001)

　SITE DATA:

　Location: DONGYING , SHANDONG, CHINA

　Building Air Exchanges Per Hour: 0.45 (unsheltered single storied)

　Time: July 18, 2019

　1337 hours ST (using computer"s clock)

　 CHEMICAL DATA:

　Chemical Name: ACETALDEHYDE

　CAS Number: 75-7-0

　 Molecular Weight: 44.05 g/mol

　AEGL-1 (60 min): 45 ppm

　 AEGL-2 (60 min): 270 ppm

　 AEGL-3 (60 min): 840 ppm

　IDLH: 2000 ppm

　 LEL: 40000 ppm

　UEL: 300000 ppm

　Carcinogenic risk - see CAMEO Chemicals

　Ambient Boiling Point: 69.8?F

　Vapor Pressure at Ambient Temperature: greater than 1 atm

　Ambient Saturation Concentration: 1,000,000 ppm or 100.0%

　 ATMOSPHERIC DATA: (MANUAL INPUT OF DATA)

　 Wind: 2.7 miles/hour from NW at 10 meters

　Ground Roughness: open country

　 Cloud Cover: 7 tenths

　Air Temperature: 35?C

　 Stability Class: B

　No Inversion Height

　Relative Humidity: 75%

　 SOURCE STRENGTH:

　Leak from hole in horizontal cylindrical tank

　 Flammable chemical escaping from tank (not burning)

　Tank Diameter: 1.400 meters

　Tank Length: 2.800 meters

　Tank Volume: 4.31 cubic meters

　Tank contains liquid

　 Internal Temperature: 35?C

　Chemical Mass in Tank: 3.42 tons

　 Tank is 94% full

　Circular Opening Diameter: 0.5 inches

　Opening is 10 inches from tank bottom

　Release Duration: ALOHA limited the duration to 1 hour

　Max Average Sustained Release Rate: 108 pounds/min

　 (averaged over a minute or more)

　 Total Amount Released: 6,049 pounds

　Note: The chemical escaped as a mixture of gas and aerosol (two phase flow).

　 THREAT ZONE:

　 Model Run: Heavy Gas

　 Red

　 : 188 yards --- (840 ppm = AEGL-3 [60 min])

　Orange: 353 yards --- (270 ppm = AEGL-2 [60 min])

　Yellow: 1029 yards --- (45 ppm = AEGL-1 [60 min])