Catalytic cracking reactor

Abstract

The invention discloses a catalytic cracking reactor, and belongs to the field of petrochemical engineering industry. The catalytic cracking reactor comprises an internal pipe, and an external pipe used for sleeving the internal pipe; the top end and the bottom end of the external pipe are provided with openings; the side wall of the external pipe is relatively provided with a plurality of circulation ports. The catalytic cracking reactor is capable of shortening reaction time, increasing oil agent contact efficiency, inhibiting backmixing, reducing equipment dead angle, reducing coking amount as far as possible, shortening standing time of oil gas in bed layer space, and reducing intermediate product overcracking in transition process from a fluidized bed reactor to a riser reactor and a down-flow reactor.

Description

technical field [0001] The invention relates to a reactor, in particular to a catalytic cracking reactor. Background technique [0002] Since the 1950s, the catalytic cracking process in the petrochemical industry has made great progress, and this process plays a pivotal role in the refining process. At present, in the field of petrochemical industry, the traditional catalytic cracking reactor adopts the form of riser reaction. The riser reaction method has the problem that the atomized raw material cannot be fully mixed with the high-temperature catalyst in the reactor for contact reaction. In the riser reactor, the linear velocity of the oil and gas is higher than that of the catalyst, resulting in carbonization of the catalyst. Back-mixing is formed due to slippage; and the reaction time of the riser reactor is long, generally around 4s. Too long reaction time has a great influence on product distribution and product properties. For this reason, in the 1990s, a gas-soli...

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However, there is a problem that the reactor equipment i

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