Method and equipment for quickly stabilizing activity of catalytic cracking catalyst

Abstract

The invention provides a method and equipment for quickly stabilizing the activity of a catalytic cracking catalyst. The method comprises the following steps that: (1) the catalyst enters the bottom of a dilute phase combustion tube via a fluidized bed reactor, is mixed with an oxygen-containing gas and fuels and then is combusted and flows upward, and the gas and the catalyst enter the fluidized bed reactor via a distributor at the outlet of the dilute phase combustion tube; (2) water vapor is injected into the fluidized bed reactor and is contacted with the high-temperature catalyst to carry out hydrothermal reaction to reduce the activity of the catalyst, the catalyst and the gas are separated at the top of the fluidized bed reactor, the separated gas is exhausted from the device and the separated catalyst returns to the fluidized bed reactor; and (3) operation is stopped and the catalyst is unloaded when the activity of the catalyst is reduced to the appropriate level. The invention also provides a catalyst ager implementing the aging method. By adopting the aging method and equipment provided by the invention, the operating conditions of the combustion reaction and the hydrothermal reaction can be controlled respectively, the activity of the aged catalyst is distributed uniformly and distribution of the products used for catalytic cracking reaction of hydrocarbon oil is obviously improved.

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 technology of oil refining enterprises. The technology converts heavy hydrocarbon oil feedstocks into products such as gasoline, diesel, propylene and liquefied gas. During the operation of the catalytic cracking unit, the activity of the catalyst in the unit needs to be kept at a stable level. If the catalyst activity is too high, the yield of dry gas and coke will be too high, and the product selectivity will be poor; if the catalyst activity is too low, if it is lower than 55, it will cause the conversion rate to decrease and the yield of light oil products to decrease. The activity of the catalyst can be measured b...

AI Technical Summary

Problems solved by technology

Due to the uneven injection of fuel oil, the distribution of catalyst in the regenerator is also uneven, resulting in uneven reduction of catalyst activity. Some catalysts are seriously deactivated in the ultra-high temperature environment where the combustion oil is injected, and some catalysts are still highly active.

Images