大型反应器催化剂床层支撑结构的有限元分析

Finite Element Analysis of Catalyst Bed Support Structure in Large Reactor

随着设备大型化,对反应器内部的支撑结构提出了更高要求。该支撑结构不仅要承担催化剂床层的自重,还要承担催化剂床层产生的压差,导致该结构与设备内壁连接处的应力值较大,很容易造成反应器壳体开裂。因此对支撑结构的形式进行了合理设计,并采用ANSYS软件中APDL语言建立了催化剂床层支撑结构的有限元模型,对该结构在内压与外载荷作用下进行了强度分析,并基于JB4732—1995对其进行了安全评定,提出了满足强度要求的优化结构,为工程上此类结构的设计提供了一定参考依据。

With the development of equipment toward large scale, higher requirements exist for the support structure in reactor.Not only the weight of catalyst bed but also the pressure differential between the layers in bed will be taken by the support, which results in high stress existing at the joint of support and vessel and cracks may be often induced. In this paper, to properly design the support structure, the finite element model was established by using APDL provided in ANSYS, and the strengths of the structure were analyzed under internal and external pressures. The results were assessed according to JB 4732-1995, and then the optimum structure was proposed, which may be referenced in engineering design for similar structures.