Lift pipe reactor pre-lifting device and process flow thereof

Abstract

The invention relates to a lift pipe reactor pre-lifting device and a process flow thereof. The lift pie reactor pre-lifting device comprises a fluidized vapor ring, a pre-lifting vapor nozzle, a pre-lifting vapor pipe, an expansion section, a single-action slide valve and a regeneration inclined pipe. An inner conveyor pipe is arranged in the expansion section, the lower part of the inner conveyor pipe is connected with the upper part of the pre-lifting vapor pipe, and the inner diameter of the pre-lifting device is twice as large as the inner diameter of the upper part of a lift pipe reactor. By adopting the method in which the inner conveyor pipe is increased, the inner diameter of the pre-lifting device is increased and therefore the structure of the expansion section is changed, the catalyst entering the expansion section has a sufficient buffering space, so that the blanking pressure fluctuation of the regeneration inclined pipe is reduced, the bias current generated by an S-shaped movement orbit can be eliminated, the pre-lifting vapor pipe can avoid the regeneration inclined pipe, the direct impact of the pre-lifting vapor on a blanking port of the regeneration inclined pipe can be avoided, the circulating capacity of the catalyst of a settlement regenerator can be increased, the catalyst in the lift pipe can be uniformly distributed, and the yield of a target product can be improved.

Description

technical field [0001] The invention relates to a riser reactor, in particular to a riser reactor pre-lifter and its technical process. Background technique [0002] Catalytic cracking technology is commonly used in the petrochemical refining industry. A large amount of heavy residue (accounting for more than 60% of raw oil) produced in the process of petroleum refining and processing can be converted into gasoline, diesel and LPG. [0003] The riser reactor is the core equipment of the catalytic cracking unit. The equipment is a vertically installed tubular reactor with a length of about 40 meters and a diameter of about 0.5 meters to 1.0 meters. During the production process, the heavy raw material—residual oil is continuously fed into the tubular reactor for cracking reaction under the conditions of high temperature of 500°C and catalyst, and the reaction products are gasoline, diesel oil and petroleum gas, etc. According to its internal functions, the catalytic cracki...

AI Technical Summary

Problems solved by technology

That is to say, in the central area, due to the small ratio of agent to oil, the heat provided is insufficient, and the raw material oil cannot be fully cracked

However, in the side wall area of ​​the riser, excessive heat is provided due to the high ratio of agent to oil, so that the raw material oil is over-cracked, thereby reducing the yield of the target product

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