Study Of The Stress State Of The Overall A Multilayered Hydrogenation Reactor

Hydrogenation reactor is a core equipment in petrochemical industry. At present, there are mainly two types of hydrogenation reactor structures in the country, such as integrated forging and welding type and single plate rolling type. All of this two types of structures made by anti-hydrogen steel has a expensive cost, the problem of their crack expansibility occurs incidentally. Therefore it's quite important to enhance the improvement of hydrogenation reactor structures. Since the application of integrated multilayer wrapping high-pressure vessel to hydrogenation reactor could not only make their cost greatly reduced, but also inhibit the crack growth, maybe there is leakage but no blast in this type of hydrogenation. This type of hydrogenation reactor has been applied successfully abroad. However, the related researches in the domestic are so slowly, that we still need to do a lot of research works. Hydrogenation reactor is working under the condition such as high temperature and high pressure, therefore, it is necessary to investigate the temperature and stress distributions in the integrated multilayer wrapping hydrogenation reactor under the steady state conditions so as to provide a theoretical basis for the design and manufacture of this type of hydrogenation reactor.Based on the literatures and the code of GB150-1998, the structural parameters and the operation situations on the upper area of the integrated multilayer wrapping hydrogenation reactor were obtained. The mechanical stresses, the temperature field, the thermal stresses and the coupling stresses of this type of multilayer wrapping hydrogenation reactor were theoretically obtained, and the temperature calculation formulae and the thermal stress calculation formulae with a certain gap were derived. By using the finite element analysis software ANSYS 11.0 the mechanical stresses, the temperature field, the thermal stresses and the coupling stresses were numerically simulated accordingly. The results of the numerical simulation were good coincident with the corresponding theoretical solutions. It was shown that the analysis of interlayer contact model was reasonable, the formulas of temperature and thermal stresses were basically correct.Buy using the finite element analysis software ANSYS 11.0 on the inside and outside walls of the geometrical discontinuities region in the integrated multilayer wrapping hydrogenation reactor, then the mechanical stresses, temperature field, the thermal stresses and the coupling stress were numerically simulated accordingly. Compared with the simulated results of relevant region in a single-layer hydrogenation reactor which had the same dimension, they had a consentaneous trend as a whole. Compared with the mechanical stresses, the thermal stresses is smaller. The stress concentration in the geometrical discontinuitious region was obvious. Finally, the stress intensity of the dangerous areas in the integrated multilayer wrapping hydrogenation reactor was assessed,and the strength meeted the design requirements.