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Composite inner component for gas-solid fluidized bed

A technology of internal components and fluidized bed, applied in chemical instruments and methods, chemical/physical process, chemical/physical/physical-chemical process, etc., can solve the problems of grid layer cannot be installed, inconvenient installation, etc., to achieve the best use effect , convenient installation, flexible layout effect

Active Publication Date: 2010-12-15
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, due to heat exchange, particle capture and other reasons, there are many auxiliary parts such as heat exchange tubes, diplegs and gas pipelines in many industrial fluidized bed devices. The installation of the internal components of the grid causes a lot of inconvenience
For example, due to the presence of these accessories, the grille layer is often not installed in the most ideal axial position

Method used

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  • Composite inner component for gas-solid fluidized bed
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  • Composite inner component for gas-solid fluidized bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Seefigure 1 As shown, the specific structure of the fluidized bed composite internal member of the present embodiment is shown, and the internal member is composed of a plurality of vertically parallel arranged component group units 1 (please refer to figure 2 As shown), each component group unit 1 is composed of a vertical support plate 10 and a plurality of guide vanes 11, 12, 13..., and the plurality of guide vanes are connected with the support through appropriate connection methods, such as welding, etc. The plates are connected together and distributed on both sides of the guide vanes, and are arranged at an oblique angle to the height direction of the vertical support plate. Such as figure 2 As shown, the guide vanes 11 and 13 are two guide vanes adjacent to each other up and down on the same side. The guide vanes on the same side of the plate form a "zigzag" flow to improve the gas-solid contact efficiency.

[0038] In the internal member of this embodiment,...

Embodiment 2

[0045] This embodiment provides another form of component group unit, its structure please refer to Figure 6A shown, with figure 1 The component group unit of the illustrated embodiment is different. The component group unit of this embodiment is directly processed from a steel plate, so that the problem of guide vanes falling off during operation due to welding defects can be eliminated. When processing this form of component group unit of the present embodiment, it is necessary to punch or cut a piece such as Figure 6B As shown in the steel plate, components such as support rods, guide vanes, and connecting ribs connecting the support rods and guide vanes have been preliminarily formed on the steel plate. clear as Figure 6A The component group unit shown.

Embodiment 3

[0047] This embodiment provides another form of component group unit, its structure please refer to Figure 7 As shown, the overall structure of the component group unit is basically the same as that of the first and second embodiments, but the support structure is a tubular support rod, and the guide vanes are directly welded on the support rod. The composite internal member composed of multiple component group units in this embodiment is especially suitable for some fluidized beds that need to be provided with heat exchange tubes, and the heat exchange tubes are used as the support rods of the internal components of the present invention, so that it does not affect the fluidized bed. The heat exchange can achieve the purpose of improving the gas-solid phase mass transfer effect and suppressing the gas-solid phase back mixing.

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Abstract

The invention provides a composite inner component for a gas-solid fluidized bed, which comprises a plurality of component group units which are vertically arranged in parallel, wherein each component group unit comprises a vertical component, both sides of each vertical component are respectively provided with a plurality of inclined guide vanes, and the inclination directions of the upper and lower adjacent guide vanes on the same side are opposite, so that gas-phase and solid-phase media flow in a zigzag mode when passing through the vertical components; and both sides of the vertical components on the same height are provided with two guide vanes which are basically symmetric, and the inclination directions of the two guide vanes are opposite, so that the gas-phase and solid-phase media flow in a crossed mode when passing through the two vanes. The inner component can effectively enhance the contact effect of gas and solid in the fluidized bed and inhibit the back mixing of gas phase and solid phase. The inner component is applicable to wider operation range, and is more flexible to arrange and convenient to install, overhaul and reform in the practical industrial fluidized bed. The invention also provides a gas-solid fluidized bed provided with the inner component.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a gas-solid fluidized bed composite internal component and a gas-solid fluidized bed provided with the internal component. Background technique [0002] Gas-solid fluidized bed has been widely used in industry because of its good heat transfer, mass transfer performance and good particle transport ability similar to fluid. However, due to the existence of air bubbles in the fluidized bed, it is easy to cause gas short circuit, and the contact efficiency between gas and solid is thus reduced. At the same time, the existence of air bubbles also causes serious back-mixing of solid particles, which in turn causes secondary back-mixing of gas, resulting in very uneven residence time distribution of the gas-solid two-phase in the fluidized bed, seriously deviating from plug flow. For a continuously operating chemical reactor, these will significantly reduce the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/34B01J19/32
Inventor 张永民卢春喜
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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