A particle bed support grid and radial flow reactor

Abstract

The invention relates to the field of petrochemical equipment, and specifically provides a particle bed support grid and a radial flow reactor. The granular matter bed support grid of the present invention is a double-layer cylindrical structure, which includes a grid cylinder arranged radially, a support rod, a distribution cylinder, and a connecting plate at the end, and the support rod is located between the grid cylinder and the grid cylinder. Between the distribution cylinders, the grid cylinder is a circular cylinder made of V-shaped wire mesh. The distribution cylinder is in the shape of a cylinder as a whole, and the surface of the cylinder has a wave-shaped structure and is provided with through holes. The particle bed support grid can make the flow velocity distribution of the inlet fluid more uniform; it can reduce the impact of the fluid on the V-shaped screen and prolong the service life of the V-shaped screen; it also has a high bearing capacity and resistance to external pressure instability. It is suitable for reaction, adsorption, drying or purification equipment that requires high fluid distribution uniformity, large processing capacity, large bed filling capacity, and strict bed pressure drop.

Description

technical field [0001] The invention relates to the field of petrochemical equipment, in particular to a particle bed support grid and a radial flow reactor using the particle bed support grid. Background technique [0002] The catalyst bed support structure of the reactor is generally divided into two types, namely, a planar support grid and a cylindrical support grid. These two support structures correspond to axial flow reactors and radial flow reactors, respectively. [0003] Cylindrical grid support structures such as figure 1 As shown, it is generally used in radial flow reactors with fluidized bed or fixed bed. The gas flow direction of this type of reactor is perpendicular to the axial direction of the equipment, and the cylindrical grid is arranged vertically, including the inner cylinder grid and the outer cylinder grid (or fan-shaped cylinder), and the catalyst bed is located between the inner cylinder and the outer cylinder. The vertical annular space is mostl...

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Problems solved by technology

[0004] However, there are three outstanding problems in the inner cylinder grid in the prior art. 1) Due to the limitation of the minimum opening distance, the opening ratio (the ratio of the opening flow area to the total cross-sectional area) on the distribution plate is low, and the medium flow rate is relatively low. Larger pressure drop across distribution plate

2) The flow velocity at the outlet of the opening of the distribution plate is fast, and the scouring effect on the V-shaped screen is obvious, resulting in erosion and corrosion of the screen, which is easy to break after long-term use

3) During the operation of the reactor, the convex surface of the grid of the inner 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 are required to be high, which may easily cause the inner cylinder to become unstable.

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