The current API 581 risk assessment model can calculate the failure possibility and consequences of pressure vessels and pressure pipelines,and can determine high-risk equipment,but can not predict high-risk position of equipment.Therefore,Aspen process simulation,thermodynamic calculation,fluid calculation and API 581 risk assessment model were combined to carry out corrosion calculation and risk assessment for the overhead condensing system equipment of atmospheric tower in a petrochemical plant.The results show that:The dew point temperature of the atmospheric tower overhead system under typical working conditions is 86 ℃,the crystallization temperature of NH4Cl is 117 ℃,and the deliquation temperature of NH4Cl is 97 ℃.The first and second elbow of the atmospheric tower top outlet pipeline P-21701 and the second elbow of the E-101A～D outlet pipeline P-21908/P-21910/P-21912/P-21914 and the second elbow of the E-101A～D tube bundle are high-risk positions.The results of corrosion calculation and risk assessment can provide reference for corrosion protection and risk management of atmospheric and vacuum equipment.
关键词
常减压装置/常压塔/腐蚀计算/风险评估
Key words
atmospheric and vacuum device/atmospheric tower/corrosion calculation/risk assessment
维普
万方数据