The Work Process And Imitating Analysis Of Coke Drum

China's petrochemical industry is an important economic pillar of sustained and steady development based industries. China's petrochemical industry accounts for 20% of total industrial economy."15" period and the next 10 years, China's petrochemical industry will be rapid development of the refining capacity will double. At the same time, with the rapid development of the industry, the petrochemical industry equipment operating conditions toward the high temperature and pressure in the direction. Petrochemical equipment, such as coke drum, hydrogenation reactor, Catalytic reactor, hydrogen compressor, a long-term corrosion at high temperature and pressure or the working environment, in operation because of pressure fluctuations, temperature changes, frequent intermittent operation and open lay-off, etc. will cause fatigue failure of equipment, such equipment in case of damage, not only caused huge economic losses, often with disastrous consequences.Coke drum is one of the important equipment of the oil refinery delayed coking units,coke drum is widely used in various petrochemical companies, bearing the residue of the processing tasks. In recent years, Coke National In-service operation has been found in the body such as the Tower Drum convex deformation and skirt weld, weld rings and tower block valve to take over parts of the crack coke and other issues, in particular skirt weld cracking phenomenon is particularly severe, cyclical expansion and contraction to crack, crack crack and therefore the drum tower section is convex deformation of the main forms of damage Coke. Coke is directly related to the safety of the normal operation of the device and safety.In order to accurately analyze the operation of coke drum, this drum on the practical operation of coke all cases the numerical simulation. According to the finite element method, ANSYS analysis software with the preheating coke drum, filling tar, steam cooling, water cooling analysis of the four conditions. Of the coke drum wall and tower, media tower heat exchange between the transient simulation. According to the calculated tower wall and tower, the temperature field of medium temperature and stress field calculation of the coupling analysis. Tata coke wall stress obtained results.At present, the domestic coke drum temperature field and stress field analysis of two-dimensional on the main stay. This innovative on coke drum temperature field and stress field in three-dimensional analysis. In the temperature field and stress field analysis on a transient numerical simulation, transient simulation process shows that the time on the wall and tower Coke Drum medium temperature changes and the stress field change. Accurately reflect the coke drum each time the actual loading situation. The analysis results show that:coke tower in the warm, into the oil, steam cooling, water-cooled four phases, the water cooling tower wall phase will produce the maximum stress, and in the tower section of the middle of the bottom of the tube produces permanent plastic deformation (convex drum), Weld Weld particular skirt high stress concentration exists, which is the main reason for weld cracking.