Pulse type lift pipe regenerator

Abstract

The invention provides a pulse-type lift pipe regenerator which belongs to an improvement on a fluidized bed regenerator structure. The pulse-type lift pipe regenerator mainly comprises a regenerating lift pipe, a big pipe, a small pipe, a regenerating agent inlet, a lift pipe inlet, a lift pipe outlet, and the like. The invention is mainly characterized in that the pipe diameter of the lift pipe regenerator reduces and expands alternately to form the pulse-type lift pipe combining the big pipe and the small pipe.

Description

1. Technical field [0001] The pulse type riser regenerator provided by the invention belongs to the structural improvement of the fluidized bed regenerator. 2. Background technology [0002] The regeneration of catalytic cracking catalyst is of great significance to the catalytic cracking process. The regenerator is one of the core equipment of the petroleum catalytic cracking unit and also the key equipment of other circulating fluidized bed reaction units. Existing regenerators mainly include bubbling bed, turbulent bed, fast bed and riser regenerator. The bubbling bed coke regeneration process and equipment are simple, but the catalyst reserves are large, the coke strength is low (60-180Kg / t.h) and the regeneration effect is poor; the catalyst regeneration process of the turbulent bed regenerator is more complicated, and the catalyst reserves are large. However, the charring intensity is high (180-300Kg / t.h) and the regeneration effect is good; the rapid bed regeneration...

AI Technical Summary

Problems solved by technology

The bubbling bed coke regeneration process and equipment are simple, but the catalyst reserves are large, the coke strength is low (60-180Kg / t.h) and the regeneration effect is poor; the catalyst regeneration process of the turbulent bed regenerator is more complicated, and the catalyst reserves are large. However, the charring intensity is high (180-300Kg / t.h) and the regeneration effect is good; the rapid bed regeneration process is complicated, but the catalyst storage is small, the charring intensity is high (400-700Kg / t.h) and the regeneration effect is good; The structure of the tube regenerator is simple, with the purpose of increasing the regeneration speed of the catalyst, so that the catalyst and air flow similar to plug flow, so as to enhance mass transfer, increase the coking strength (greater than 1000Kg / t.h), promote catalyst regeneration, and reduce the size of the regenerator , small amount of catalyst storage, and low carbon content of the regenerated catalyst, but due to the high flow rate of the catalyst, in order to ensure the regeneration effect, the height of the riser regenerator is high and the light-off temperature is limited, so the riser regeneration is completely adopted difficult to achieve industrialization

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