SU710607A1 - Powdered catalyst regenerating device - Google Patents

Description

The invention relates to the regeneration of a powder catalyst and can be used in the oil refining, petrochemical and other industries.

Known regenerator powder catalyst comprising a housing with a gas supply manifold, a cyclone group and fittings for input and output of the catalyst. The housing is divided into sections by vertical diffusers equipped with overflow windows allowing the catalyst in a fluidized state to flow from one section to another 1.

A disadvantage of the known regenerator is the uneven regeneration of the catalyst due to the different residence time of the catalyst particles in the high temperature zone and its deactivation due to the long residence time of a large mass of the catalyst in a fluidized state, which reduces technical and economic indicators.

The purpose of the invention is the intensification of the regeneration process and the improvement of technical and economic indicators.

To achieve this goal, the regenerator is equipped with an additional regeneration chamber, made in the form of a tube of variable cross section, increasing towards the top, and located coaxially with the body in such a way that its upper part is

0 enters the housing and forms an annular space with it. At the same time, a gas supply manifold is installed in the lower part of the pipe, and a fender device at the top.

five

Alternatively, multiple gas supply manifolds can be installed. Pipe height.

The drawing shows schematically the regenerator.

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The regenerator consists of a cylindrical housing 1 having an upper expanded and a lower constricted part. In the upper extended part of the apparatus is located a cyclone group 2 and

5 collector 3 for collecting flue gases, as well as choke 4 for exhausting flue gases.

In the lower part of the housing there is a gas supply manifold 5, fitting 6

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for the removal of the catalyst. The additional chamber 7, mounted coaxially inside the housing 1, has for example three sections 8.9 and 10 of different diameters increasing upwards and gas supply manifolds 11, 12. The upper part of the chamber 7 has a conical shape and is equipped with a fender 13 for changing the direction of flow and introducing the catalyst into the zone of the fluidized bed 14. The lower part of the chamber is connected to the transport line 15.

PereriepaTop works as follows.

A coked catalyst is introduced through transport line 15 into chamber 7. Gas is introduced through the collector 12, through which catalyst is transported and coke burned out.

An additional amount of air is introduced through the collector 11 into the middle part 9 of the chamber 7, which allows increasing the oxygen concentration in the regenerating air and increasing the burning intensity of coke from the catalyst. In chamber 7, about 65% of the coke is burned.

The gas-catalyst stream is withdrawn from the 5th chamber 7 at a speed of about 2-3 m / s. The catalyst enters the fluidized bed zone 14, where the remaining amount of coke is burned from its surface to a residual content of about 0.1% by weight.

The regenerated catalyst is removed from the fluidization zone through nozzle 6. The flue gases enter cyclones 2, where most of the entrained catalyst dust is trapped and is returned to the fluidization zone through the drains.

14, Flue gases through collecting device 3 and fitting 4 are led out of the regenerator.

This regenerator design provides a short residence time of the catalyst in the high temperature zone, which contributes to the intensification of regeneration and reduces the degree of its deactivation, and the small mass of the catalyst, which is simultaneously in the high temperature zone, makes it possible to reduce its consumption.

Claims (2)

1. A powder catalyst regenerator comprising a housing with a gas supply manifold, a cyclone, a group and a catalyst outlet choke, characterized in that, in order to intensify the regeneration process and improve the technical and economic performance, it is equipped with an additional regeneration chamber, which is expanded in the form of a variable cross-section tube that increases up, and located coaxially with the body so that its upper part enters the body and forms with him the annular space when This in the lower part of the pipe is installed gas supply manifold, and in the upper fender device. 2. The regenerator according to claim 1, which is based on the fact that several gas supply manifolds are installed along the height of the pipe. Sources of information taken into account in the examination 1. US patent 3563911, cl. 252-417, 1971.