Particulate matter bed layer support grid and radial flow reactor

Abstract

The invention relates to the field of petrochemical engineering equipment, and particularly provides a particulate matter bed layer support grid and a radial flow reactor. The particulate matter bed layer support grid is of a double-layer round tubular structure, and comprises a grid tube, a support rod, a distribution tube, and a connecting plate, wherein the grid tube, the support rod and the distribution tube are in radial arrangement; the connecting plate is arranged at the end part; the support rod is positioned between the grid tube and the distribution tube; the grid tube is a round tube formed by a V-shaped screen; the distributive tube is integrally in a round tube shape; the tube surface is of a wave-shaped structure and is provided with through holes. The particulate matter bedlayer support grid has the advantages that the flowing speed distribution of the inlet fluid can be more uniform; the impact of the fluid on the V-shaped screen can be reduced; the service life of theV-shaped screen can be prolonged; high bearing capability and external pressure stability loss resistant capability are realized; the particulate matter bed layer support grid is applicable to equipment for reaction, absorption, drying or purification and the like with high requirements on fluid distribution uniformity, great treatment quantity, great bed layer filling quantity, and strict bed layer pressure drop requirements.

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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