The Consequence Estimation Studies On The Explosion And Ammonia Leak Of The Ammonia Synthesis Section In The Small And Medium Sized Ammonia Plant

Risk assessment has become a hot study in safety evaluations in recent years, and the consequence analysis is an important part of it. Lots of accidents on the ammonia synthesis plants proved that the security situation of ammonia synthesis plant is serious in our country, so that it's of a great significance on the accident consequence analysis.Based on the study of the consequence estimation methods of the explosion and the toxic gases, the estimation methods on the hazard consequence of the explosion and the ammonia leak from the ammonia synthesis section is obtained as follows: 1. The hazard radius of different levels from explosion can be estimated using the TNT equivalent method and the blast overpressure; 2. The consequence from ammonia leak can be estimated by the Gaussian puff model and probability function.According to the methods above, the consequence estimation on the ammonia synthesis section of a fertilizer plant in Shandong with the production of 150 000 tons annually is completed, and the largest blast damage radius on human body and construction generated from each device and the whole section is obtained. The order of every device in the section is done according to the calculated results. The descending order of the equipment in accordance with the shock wave is the water cooler, the ammonia separator II, the cold exchanger, the heat exchanger, the ammonia separator I, the oil separator, the ammonia converter, the ammonia cooler, the waste heat boiler, the recycling machine. And the order of the devices in the ammonia synthesis section in accordance with the proliferation of toxic ammonia leak is the cold exchanger, the water cooler, the heat exchanger, the ammonia separator II, the ammonia separator I, the ammonia converter, the ammonia cooler, the oil separator, the waste heat boiler, the recycling machine.Meanwhile, the software-based consequence estimation of ammonia synthesis section in the small and medium sized ammonia plant using the computer language of Visual Basic 6.0 is realized.