Method of eliminating fume for regenerated catalyst

Abstract

A method of removing smoke from a regenerative catalyst comprise, a regenerative catalyst is added into a steam stripping machine for regenerative smoke and brought contact with steam stripping medium, smoke there of is removed, after steam stripping, the regenerative catalyst leaves the steam stripping machine. A tray inner member with four or more floors is horizontally in the steam-stripping machine. The regenerative catalyst and the steam stripping medium would change directions of each other when flowing each floor. By the invention, smoke of regenerative catalysts would be reduced, impurities in hydrocarbon product will be lowered down.

Description

technical field [0001] The present invention belongs to the catalytic cracking method of petroleum hydrocarbons in the absence of hydrogen, more specifically, a method for degassing a regenerated catalyst. Background technique [0002] In the conventional catalytic cracking process, the raw oil is atomized with water vapor and sprayed into the riser, where it contacts the high-temperature catalyst (600-700°C) from the regenerator, and then vaporizes and reacts. The residence time of oil and gas in the riser is very short, generally only a few seconds. The reaction product is separated from the entrained catalyst by the cyclone separator and then leaves the reactor to the fractionation tower. The catalyst with coke (called spent catalyst) falls into the stripping section below from the settler. The stripping section is equipped with multi-layer herringbone baffles and superheated steam is introduced at the bottom, and the oil gas adsorbed on the catalyst to be used and the ...

AI Technical Summary

Problems solved by technology

The stripper is a baffle-type stripper, and the gas-solid flow is restricted at the angle between the baffle and the side wall and under the herringbone baffle, which affects the gas-solid contact efficiency.

Images