Method for improving density of fast bed and reactor

Abstract

The invention provides a method for improving the density of a fast bed and belongs to the technical field of fluidization, petrochemical industry, olefin production and aromatic hydrocarbon production equipment, aiming at solving the problems of an existing fast bed reactor that the catalyst density is low, the catalyst storage amount is low and the airspeed is high. The method comprises entering and exhausting of the fast bed, oil gas and catalysts, and is characterized in that a reverse distribution facility is designed at the lower part of the fast bed to reduce the upward movement speed of the catalysts, and the density of the catalysts of the fast bed is increased by enhancing the slipping of the catalysts. By virtue of the method, the density of the catalysts of the fast bed can be greatly improved, the storage amount of the catalysts is improved, the airspeed of the fast bed reactor is greatly reduced, and the conversion capability of the fast bed reactor is improved; and furthermore, the feeding requirements of a plurality of types of process gas can be met. The invention further provides a reverse distributor for realizing the method and gas feeding distributor equipment. The method is used for catalytic cracking, olefin production and aromatic hydrocarbon production devices and the like.

Description

technical field [0001] The invention belongs to the technical fields of fluidization, petrochemical, olefin production and aromatics production equipment, and in particular relates to a method and a reactor for increasing fast bed density. Background technique [0002] Some catalytic cracking units are equipped with fast bed reactors, including fast bed reactor shells, process medium inlet pipes, outlet pipes and distributors. A number of wear-resistant round holes or short pipes with a diameter of 50-100 mm are arranged on the spherical head-shaped connection distribution plate. During operation, oil, gas and catalyst enter from the inlet pipe of the process medium, flow through the distributor from bottom to top (through its wear-resistant round hole or short pipe) and enter the fast bed, and continue to flow upward to be discharged from the outlet pipe at the upper end. Due to the high flow rate of the gas and catalyst flowing through the wear-resistant round hole or sho...

AI Technical Summary

Problems solved by technology

Due to the high flow rate of gas and catalyst flowing through wear-resistant circular holes or short tubes, and in line with the flow direction of the fast bed, the catalyst passes through the fast bed quickly, resulting in a small catalyst density and a low catalyst storage capacity in the fast bed. Smaller, often cannot meet the requirements of the process for air speed

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