Inner-component for enhancing air-solid contact of catalytic cracking reaction system

Abstract

An internal member used to enhance the gas-solid contact of the catalytic cracking reaction system, which is composed of a distribution plate located at both ends of the low linear velocity reaction zone and a tube bundle between the distribution plates. The reaction zone is divided into a tube side and a shell side, of which two There are several holes on the first distribution plate, and the tube bundle is composed of straight tubes. The two ends of the straight tubes are respectively connected with the holes on the two distribution plates. The shape and size of the two ends of the straight tubes are exactly the same as the corresponding holes on the two distribution plates. , the height of the internal member is equal to or less than the height of the low linear velocity reaction zone. The inner member increases the resistance of the gas-solid mixture transport at the axial center of the low linear velocity reaction zone, reduces the resistance of the gas-solid mixture transport at the side wall, and makes the gas-solid mixture relatively uniform in the axial and radial directions, increasing the The gas-solid contact efficiency is improved, and the strength of secondary reactions such as catalytic cracking isomerization and hydrogen transfer in the reaction zone is enhanced; and the shell side can be used to adjust the temperature of the reaction zone, which is also conducive to the control of the reaction type, thereby improving the product nature.

Description

technical field [0001] The present invention belongs to the catalytic conversion equipment of petroleum hydrocarbons in the absence of hydrogen, and more particularly, to a gas-solid contact internal for fluidized catalytic conversion. Background technique [0002] Catalytic cracking is one of the main heavy oil lightening processes in oil refining enterprises. Through this process, large molecular heavy petroleum hydrocarbons can be cracked into small molecular high-priced petroleum products on hot catalysts, such as catalytic gasoline. The main steps are as follows: the hydrocarbon feedstock is in contact with the hot regenerated catalyst and undergoes catalytic cracking reaction at 460-560°C; the mixture of reacted oil gas and ungenerated catalyst enters the settler through the riser reactor; in the settler, the oil gas It is separated from the raw catalyst; the oil and gas enter the subsequent fractionation system; the raw catalyst is in countercurrent contact with the s...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the fast bed is always required to maintain a high dense-phase bed material level, which will lead to a corresponding increase in energy consumption and operational difficulty; Will enter the Tubular Cone Reactor, thereby affecting the reaction inside the Tubular Cone Reactor

Images