化工设计竞赛SITE,DATA醋酸乙烯储罐蒸汽云(0001)

　SITE DATA:

　Location: DONGYING , SHANDONG, CHINA

　Building Air Exchanges Per Hour: 0.62 (unsheltered single storied)

　Time: July 18, 2019

　1221 hours ST (using computer"s clock)

　 CHEMICAL DATA:

　Chemical Name: VINYL ACETATE

　CAS Number: 108-5-4

　Molecular Weight: 86.09 g/mol

　AEGL-1 (60 min): 6.7 ppm

　 AEGL-2 (60 min): 36 ppm

　 AEGL-3 (60 min): 180 ppm

　LEL: 26000 ppm

　 UEL: 134000 ppm

　Ambient Boiling Point: 162.5?F

　Vapor Pressure at Ambient Temperature: 0.24 atm

　Ambient Saturation Concentration: 235,544 ppm or 23.6%

　 ATMOSPHERIC DATA: (MANUAL INPUT OF DATA)

　 Wind: 2.7 meters/second 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 spherical tank

　 Flammable chemical escaping from tank (not burning)

　Tank Diameter: 18 meters

　 Tank Volume: 3,054 cubic meters

　Tank contains liquid

　 Internal Temperature: 35?C

　Chemical Mass in Tank: 8.52 tons

　 Tank is 0.19% full

　Circular Opening Diameter: 0.5 inches

　Opening is 5.40 inches from tank bottom

　Ground Type: Default soil

　Ground Temperature: equal to ambient

　Max Puddle Diameter: Unknown

　Release Duration: ALOHA limited the duration to 1 hour

　Max Average Sustained Release Rate: 12 pounds/min

　 (averaged over a minute or more)

　 Total Amount Released: 540 pounds

　Note: The chemical escaped as a liquid and formed an evaporating puddle.

　The puddle spread to a diameter of 6.6 yards.