A Catalyst Lifting Process

Abstract

The present invention relates to a catalyst lifting process. According to the catalyst lifting process, the catalyst lifting between reactors adopts hydrogen to lift, and the lifting between the last reactor and the regenerator and the catalyst lifting after regeneration through the regenerator adopt nitrogen to lift. The catalyst lifting process is characterized in that the nitrogen for lifting the catalyst is heated, and the heating temperature is preferably 420-510 DEG C. According to the present invention, the nitrogen temperature is increased, such that the catalyst lifting effect is improved, the catalyst cycle rate is stable, the catalyst wear is reduced, the problem of the catalyst breaking is solved, and it is ensured that the device operates for a long term.

Description

technical field [0001] The invention relates to a catalyst lifting process, in particular to the catalyst lifting of a continuous catalytic reforming device in petroleum processing. Background technique [0002] Catalytic reforming is an important process of petroleum secondary processing, and it is a catalytic reaction process aimed at producing high-octane gasoline components and aromatics. Uninterrupted catalyst delivery is the key to the continuous reforming reaction, and the catalyst lifter is the key equipment to ensure the continuous circulation of the catalyst in the reaction-regeneration system. The catalyst enters the reactor sequentially from the upper hopper by its own gravity, the lower hopper to the catalyst lifter, and then lifts to the upper hopper of the next reactor by means of lifting gas, and then lifts to the regenerator after coming out of the reactor. Coking, oxychlorination, roasting, reduction and other processes enter the reactor for catalyst circu...

AI Technical Summary

Problems solved by technology

The nitrogen gas between the regenerator and the reactor is lifted, and the catalyst powder carried in the nitrogen is recovered through the dust collector, and the nitrogen is pressurized by the compressor at room temperature and used to lift the raw / regenerated catalyst. In the prior art, the Sampling of the upgraded catalyst (including unused catalyst and regenerated catalyst), it was found that about 1% to 3% of the upgraded catalyst was fragmented, which increased the loss of the catalyst, blocked the Johnson net in the reforming reactor, and reduced the catalyst and oil gas. contact time, and even cause shutdown in severe cases

After replacing the catalyst and improving the strength of the catalyst, it still has little effect

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