关键词: 汽油加氢装置, 反应器, 泡罩式, 分配器, 气相分配, 不均匀度, 分配器压力降

Abstract:

In this paper, the main characteristics and principles of the bubble-cap distributor which widely used in the second stage gas phase hydrogenation of gasoline are analyzed. At the same time, the single test and combination test of the bubble-cap distributor are carried out respectively. The uneven distribution coefficient and pressure drop are used as performance evaluation indexes to explore its gas phase distribution characteristics. The experimental results show that the distribution performance of bubble-cap distributor is not affected by the air volume. Increasing the air flow rate can not improve the gas phase distribution performance, but increases the flow resistance and the pressure drop. And due to structural reasons, the gas phase after flowing out of the central tube is basically concentrated under the central tube, with a small diffusion range, and the cooperation is not formed. According to the performance and energy saving analysis, the bubble cap structure distributor is not the best structure as a gas phase distributor. Therefore, without affecting the distribution characteristics, the new gas phase distributor should adopt a non-bubble cap structure, thus greatly reducing the gas phase flow resistance. In addition, the distribution performance of the unit and the interaction between the adjacent units should be considered, and the distribution area should be expanded as much as possible. The homogenized combined flow field can improve the safety and stability of the internals during operation.

Key words: gasoline hydrogenation unit, reactor, bubble-cap, distributor, gas phase distribution, unevenness, pressure drop of distributor