Aging method and equipment of catalytic cracking catalyst

Abstract

The invention provides an aging method and equipment of a catalytic cracking catalyst. The method comprises the following steps that: (1) in a catalyst aging vessel, vapor is in contact with a high-temperature catalyst to reduce the catalyst activity, gas in the catalyst aging vessel and the catalyst carried by the gas are separated at the top of the catalyst aging vessel, the gas enters a post-processing system, and the catalyst returns to the bottom of the aging vessel; (2) fuel is introduced into a dilute phase burner, the catalyst at the bottom of the aging vessel enters the dilute phase burner to be mixed with oxygen-containing gas and the fuel to carry out burning reaction, and the gas and catalyst after complete burning reaction enter the middle part of the aging vessel; and (3) after the catalyst activity is reduced to the target activity, the device stops working, and the catalyst is discharged. By adopting the catalyst aging method provided by the invention, the hydrothermal reaction of the catalyst reduces the catalyst activity, the catalyst is separated by heating, the operating conditions and reaction speed of the catalyst can be conveniently controlled respectively, the aged catalyst has even activity distribution, and the product distribution is obviously improved after the aged catalyst is used for a catalytic cracking unit.

Description

technical field [0001] The invention relates to a method and equipment for stabilizing the activity of catalytic cracking catalysts, more specifically, a method and equipment for rapidly reducing the activity of catalytic cracking catalysts to a certain stable level. Background technique [0002] Catalytic cracking technology is the main secondary processing method in oil refineries. The technology converts heavy hydrocarbon oil feedstocks into products such as gasoline, diesel, propylene and liquefied gas. [0003] During the operation of the catalytic cracking unit, since the average particle size of the catalyst particles is 40-80 μm, during the operation of the unit, the microspherical catalyst is continuously lost from the unit, and fresh catalyst needs to be replenished in time. In addition, some catalytic cracking heavy raw materials have high metal content. When processing these heavy raw materials, metals such as iron, nickel, vanadium, and calcium in the raw mater...

AI Technical Summary

Problems solved by technology

Due to uneven injection of combustion oil and uneven distribution of catalysts, the catalyst activity is not uniformly reduced. Some catalysts are seriously deactivated in the ultra-high temperature environment where the combustion oil is injected, and some catalysts are still very active.

At present, there is no measure and operation for aging before the fresh agent is added

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