化工设计竞赛SITE,DATA醋酸储罐蒸汽云(0001)

发布时间：2021-09-08 00:19:17 浏览数：次

　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: ACETIC ACID, GLACIAL

　CAS Number: 64-19-7

　Molecular Weight: 60.05 g/mol

　ERPG-1: 5 ppm

　ERPG-2: 35 ppm

　ERPG-3: 250 ppm

　IDLH: 50 ppm

　 LEL: 40000 ppm

　UEL: 199000 ppm

　Ambient Boiling Point: 244.2?F

　Vapor Pressure at Ambient Temperature: 0.035 atm

　Ambient Saturation Concentration: 35,423 ppm or 3.54%

　 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 spherical tank

　 Flammable chemical escaping from tank (not burning)

　Tank Diameter: 14.2 meters

　 Tank Volume: 1,499 cubic meters

　Tank contains liquid

　 Internal Temperature: 35?C

　Chemical Mass in Tank: 2.99 tons

　 Tank is 0.17% full

　Circular Opening Diameter: 0.5 inches

　Opening is 10 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: 2.19 pounds/min

　 (averaged over a minute or more)

　 Total Amount Released: 74.7 pounds

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

　The puddle spread to a diameter of 10.4 yards.

　 THREAT ZONE:

　 Model Run: Gaussian

　Red

　 : 17 yards --- (250 ppm = ERPG-3)

　Note: Threat zone was not drawn because effects of near-field patchiness

　 make dispersion predictions less reliable for short distances.

　Orange: 60 yards --- (35 ppm = ERPG-2)

　 Yellow: 165 yards --- (5 ppm = ERPG-1)