Coke-burning method for hydrocarbon conversion catalyst regeneration and structure of coke-burning area of regenerator

Abstract

The invention discloses a coke-burning method for hydrocarbon conversion catalyst regeneration and a structure of a coke-burning area of a regenerator. The invention solves the disadvantage of the temperature jump risk in a coke-burning area of a hydrocarbon conversion catalyst in the prior art. The method comprises the following steps: allowing a catalyst to be regenerated to enter a coke-burning area of a radial catalyst moving bed under gravity, allowing the catalyst to contact an oxygen-containing regenerating gas and burning out coke deposits on the catalyst, and allowing the catalyst to enter a chlorine oxidation area, wherein the coke-burning area of the catalyst moving bed comprises an inner screen and an outer screen; the lower diameter is larger than the upper diameter of the outer screen; the upper and the lower parts of the outer screen are connected by a conical structure; the outer screen with different diameters and the inner screen forms, from up to down, an upper quick-burning section, an intermediate transition section, and a lower overheating section of the coke-burning area; and the thickness ratio of the catalyst bed layers of the quick-burning section and the overheating section is 0.25-1, and the height ratio is 1-8.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and relates to a method for regenerating and burning a hydrocarbon conversion catalyst and a new structural form of the burning area of ​​a regenerator. Background technique [0002] Catalytic reforming is an important reforming process in the field of oil refining and petrochemical industry, and it is also one of the important means to upgrade the quality of fuel oil. It converts naphtha into reformed oil rich in aromatics through hydrogen-catalyzed reaction, and produces hydrogen and liquefied petroleum gas as by-products. The catalytic reaction process is accompanied by a carbon deposition reaction, which causes deep dehydrogenation of hydrocarbons to generate olefins, and olefins are cyclized and polymerized to form condensed ring aromatics, which are adsorbed on the surface of the catalyst and finally form carbon deposition, which deactivates the catalyst. The deactivated catalyst need...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the disadvantages of overheating risk in the scorched zone of hydrocarbon conversion catalysts (such as reforming catalysts) in the prior art, and provides a new catalyst regeneration scorched method and the structure of the scorched zone, which can be effectively avoided by using the present invention During the catalyst regeneration process, due to the failure to burn the residual carbon in time, when the oxygen content of the gas in the system suddenly increases, a fly temperature will be generated near the Johnson inner net in the upper part of the bed, resulting in damage to the Johnson net.

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