A flow-guiding support grid for reactor catalyst bed and fluidized bed reactor

Abstract

The invention relates to the field of petrochemical equipment, and provides a flow-guiding support grid used for a catalyst bed of a reactor and a fluidized bed reactor. The flow-guiding support grid is a double-layer cylindrical structure, including distribution cylinders arranged radially, support bars, contact cylinders, and connecting ring plates at the ends. The distribution cylinders are arranged in parallel with the contact cylinders. The support bar is located between the distribution cylinder and the contact cylinder, the contact cylinder is adjacent to the catalyst bed, the contact cylinder is provided with evenly distributed multi-circle channel holes, and on its side adjacent to the catalyst bed, A deflector is arranged above each ring of channel holes, and the deflector is an arc-shaped cover structure, its convex surface directly contacts the catalyst bed, and its concave surface faces the contact cylinder. The flow-guiding support grid of the present invention can effectively prevent catalyst particles from blocking the mesh gaps or fluid passages of the support grid by arranging deflector plates, and can guide the flow of the catalyst to reduce flow resistance.

Description

Technical field[0001]The present invention relates to the field of petrochemical equipment, and more particularly to a flow-flow support grid for reactor catalyst beds, and a flow bed reactor using the guiding flow support grid.Background technique[0002]The catalyst bed support structure of the reactor is generally divided into two, ie, a planar support grid and a cylindrical support grid. These two support structures correspond to an axial flow reactor and a radial flow reactor. The radial flow reactor can also be distinguished into a fixed bed diaphragm and a flow bed reactor in accordance with the flow of the catalyst bed. The flow bed reactor is generally a radial flow reactor.[0003]Catalyst Bed, a catalyst bed of a flow bed diameter reactor (hereinafter referred to as the flow bed reactor),,, such asfigure 1 Indicated. The gas flow direction of the reactor is perpendicular to the axial direction of the device, and the cylindrical grid is arranged vertically, including inner tub...

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Problems solved by technology

[0004] However, there is a prominent problem in the cylindrical support grid in the prior art. When the reactor is working, the catalyst particles are in contact with the inner cylinder grid. Because the gap between the V-shaped wire mesh of the inner cylinder grid is small, the catalyst often will block the gap

Especially in high temperature occasions, the catalyst itself is easy to coke, has poor fluidity, and is more likely to adhere to the surface of the support grid, causing agglomeration

If the coking is serious, the temperature of the corresponding part on the inner cylinder will rise, and under the extrusion of the catalyst, the V-shaped wire mesh of the inner cylinder is likely to be deformed or even broken, causing the catalyst to leak out and affecting the normal operation of the reactor.

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