Direct-current type short contact rotational flow reactor

Abstract

The invention discloses a direct-current type short contact rotational flow reactor, and belongs to contact catalysis reaction equipment when a gas solid phase is in shortage. The direct-current type short contact rotational flow reactor is characterized in that a guiding blade (7) is arranged in a barrel (8), the central position of the guiding blade (7) is provided with a fairing cone (6), and the fairing cone (6) and the barrel (8) are coaxial; the guiding blade (7) and the fairing cone (6) can divide the barrel (8) into an upper mixing region (5) and a lower reaction/separation region (9); the upper end of the mixing region (5) is provided with an inlet cone section (4), multiple catalyst feeding pipes (2) are uniformly arranged on the periphery of the top of the inlet cone section (4), a cone surface of the inlet cone section (4) is provided with multiple fresh raw material introducing devices (3), and an anti-coking steam distributor (14) is arranged below the top of the inlet cone section (4). The direct-current type short contact rotational flow reactor provided by the invention has the advantages that the gas-solid standing time is short, the axial backmixing is little, and a catalyst and a gas product are separated in real time.

Description

technical field [0001] The utility model relates to a direct-flow short-contact cyclone reactor, which belongs to gas-solid phase short-time contact catalytic reaction equipment, and is especially suitable for catalytic cracking technology for heavy and inferior oil processing. Background technique [0002] The general form of the traditional catalytic cracking reactor device: oil and gas react in the riser to form a gas-solid mixture, which is quickly separated by the rapid separation structure at the end of the riser, and then enters the oil and gas collection chamber through the cyclone separator, and then is introduced into the fractionation tower through the oil transfer line . In recent years, in order to adapt to the characteristics of heavy crude oil and residual oil, many oil companies and research institutions have made a series of improvements to the catalytic cracking riser reactor, mainly including: pre-lifting technology in the feed section, heavy oil feed nozz...

AI Technical Summary

Problems solved by technology

However, due to the problems of the riser reactor itself, there are large axial backmixing, uneven gas-solid distribution, rapid decline in catalyst activity and selectivity due to carbon deposition, and serious secondary reactions in the middle and rear of the riser. The yield and selectivity of intermediate products are not high, the content of olefins in gasoline is high, and the coking at the end of the reactor and the subsequent settler, etc.

[0003] As the crude oil becomes heavier and inferior, based on the actual situation of the current catalytic cracking unit, as the core of the catalytic cracking reaction process - the traditional riser reactor, it is difficult to make a breakthrough in the catalytic cracking of residual oil.

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