Method and apparatus for rapidly stabilizing catalyst activity by heavy fuel oil

Abstract

A method and equipment for rapidly stabilizing catalyst activity using heavy fuel oil, comprising: (1) The catalyst enters the bottom of a dilute-phase combustion tube from a fluidized bed reactor, and the dilute-phase combustion tube is provided with two or more feed ports from bottom to top , spraying oxygen-containing gas and heavy fuel oil in sequence, the catalyst first mixes with oxygen-containing gas and flows upwards, then mixes with heavy fuel oil, and then replenishes oxygen-containing gas; (2) the high-temperature gas and catalyst after combustion reaction The outlet of the dilute phase combustion tube enters the fluidized bed reactor; (3) the high temperature catalyst in the fluidized bed reactor reacts with water vapor to reduce the activity, and the catalyst separated from the top of the catalyst aging device returns to the fluidized bed reactor; (4) the catalyst is aged After completion, shut down and unload the catalyst. and a device for implementing the method. By adopting the aging method and equipment provided by the invention, the activity of the catalyst can be quickly reduced to a stable level, the activity of the aged catalyst is evenly distributed, and the distribution of 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, to a method and equipment for using heavy fuel oil as fuel to rapidly stabilize the activity of catalysts. 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 by the mic...

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.

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