Particle Bed Support Structure and Axial Radial Reactor

Abstract

The invention discloses a particle bed layer support structure and an axial-radial reactor. The support structure comprises a support grating (1) and a pressing grating (2), the support grating (1) and pressing grating (2) are arranged in the vertical direction at intervals; the support grating is arranged under the pressing grating; a particle bed layer (3) is arranged between the support grating and the pressing grating; the support grating and the pressing grating are coaxially arranged and are in two conical shapes whose size decreases in the upward direction. The axial-radial reactor has the particle bed layer support structure. Through the abovementioned scheme, the flow area of the inlet of the particle bed layer is enlarged, the air flow rate is reduced, the flushing on the particles in the inlet is reduced, the pulverization of particles becomes difficult; after the air flow rate in the inlet of the bed layer is reduced, particles with a lower strength and smaller size can be adopted, thus the utilization rate of particles is improved, at the same time, the pressure drop of the bed layer is reduced, and the energy is saved.

Description

technical field [0001] The invention relates to the field of petroleum and chemical equipment, in particular to a particle bed support structure and an axial radial reactor with the support structure. Background technique [0002] For the catalyst bed support structure of the reactor, it is generally divided into two types, namely, a planar support grid and a cylindrical support grid. These two support structures correspond to axial fixed bed reactors and radial reactors, respectively. Planar grilles and cylindrical grilles have their own scope of application, and each has its own advantages and disadvantages. [0003] 1) The planar grid support structure of the catalyst bed, such as figure 1 As shown, it is generally used in axial fixed bed reactors. The catalyst bed of this type of reactor is arranged in a horizontal cake shape, the fluid flows through the bed from top to bottom along the axial direction, and the bed has no heat exchange with the outside world. The str...

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Problems solved by technology

But this kind of reactor also has some disadvantages: the bed of the catalyst bed is generally thicker, and the resistance of the reactants to flow through the bed is large. In order to reduce the resistance, a large particle catalyst must be used; because of its large pressure drop, it has a certain impact on the strength of the catalyst. Higher requirements, preventing catalyst particles from being pulverized by the impact of high-speed airflow

In this way, the convex surface of the inner cylinder and the fan-shaped cylinder will bear the pressure from the catalyst, that is, the external pressure. Under the action of the external pressure, the stability and rigidity of the inner cylinder and the fan-shaped cylinder are required to be higher, which is likely to cause instability.

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