The tower support of the air separation unit is mainly used to support the tower body in the cold box, and the common tower form is mainly composed of ring plate, rib plate, riser and connecting straight pipe.
Through the finite element analysis of the traditional solid model, and through the correct loading and boundary conditions, considering the low height of the tower support, and without considering the impact of wind load, seismic load, ice and snow load, the load mainly includes the dead weight of the support and the weight of the tower and its accessories. Therefore, only symmetric constraints are added to the symmetric plane to constrain its displacement degrees of freedom along the normal direction of the symmetric plane, and full constraints are added to the bottom to constrain the degrees of freedom in three directions. The specific optimization scheme is as follows: considering that the rib plate hardly plays a supporting role, the rib plates between the two annular plates are all canceled; Cancel one straight pipe connecting the risers and replace it with two inclined pipes. Support the annular plate diagonally to reduce the included angle between it and the two risers. Through strength check, the bearing capacity of the optimized structure is 3 times higher than that of the original, and the structure is simpler, the processing is more convenient, and the production cost is reduced.
Through the use of finite element analysis software, DEAR Air Separation Plant carries out model analysis and optimization for the commonly used empirical tower of air separation equipment, so as to improve the bearing capacity of the support, reduce the processing difficulty and save the material cost.
