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Vertical sieve plate used for fluidized bed

A vertical sieve plate, fluidized bed technology, applied in the field of internal components, to achieve the effect of large processing capacity, small fluctuation of bed pressure drop, and many contact opportunities

Inactive Publication Date: 2011-10-26
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It effectively improves the mass transfer efficiency between the bubble phase and the emulsified phase in the bed, and can also greatly reduce the axial back-mixing of the gas phase and the particle phase in the bed, but its operating line speed is lower than that of the fast bed and pneumatic conveying bed. Operate only in bubbling and turbulent fluidization regions

Method used

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  • Vertical sieve plate used for fluidized bed
  • Vertical sieve plate used for fluidized bed
  • Vertical sieve plate used for fluidized bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Vertical sieve plate component with one cap:

[0016] The vertical screen member 19 is the core component of the fluidized bed. When the size of the fluidized bed is small, its structure is determined by figure 1 Combine figure 2 and image 3 As shown, it includes a circular support plate 1, a cap 2 and an overflow pipe 3. The diameter of the support plate 1 is larger than the inner diameter of the fluidized bed; there are two symmetrical overflow pipe holes 1 in the radial direction of the support plate 1. 1. The center distance between the two overflow pipe holes is 0.52-0.86 of the inner diameter of the fluidized bed; the support plate 1 is provided with a circular plate hole 1-2 concentric with it, and the circular plate hole 1-2 is connected to the support plate 1. The diameter ratio is 0.19-0.28, the best value is 0.25; four solid fluidization holes 1-3 are evenly distributed on the support plate 1, and the diameter ratio of the solid fluidization holes 1-3 to the c...

Embodiment 2

[0023] Vertical sieve components with multiple caps:

[0024] When the size of the fluidized bed is large, the number of caps 2 and plate holes 1-2 on the support plate 1 can be one or more, and the specific number n is determined by the cross-sectional area of ​​the support plate A and cap 2 in the fluidized bed. Diameter, initial fluidization velocity u mf And the air velocity u of the circular plate hole 1-2 i Determine, meet the formula u mf A=nu i A i , Where A i Is the area of ​​each circular plate hole 1-2. The circular plate holes 1-2 and the cap 2 are evenly distributed on the support plate 1, and the distance between the centers of two adjacent circular plate holes 1-2 should meet the following conditions: The gas-solid separation holes on the adjacent cap 2 2-3 The ejection curve of the ejected solid particles just meet or tangent at the midpoint of the distance. The principle of the arrangement of the plate holes 1-2 and the cap 2 on the support plate is to ensure tha...

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Abstract

The invention discloses a vertical sieve plate used for a fluidized bed. The vertical sieve plate comprises a circular support plate, a cover hood and an overflow pipe, wherein an overflow pipe hole, a solid vulcanization hole and a circular plate hole are formed on the circular support plate; a solid-gas separating hole is formed on the cover hood; a clearance is reserved between the cover hood and the circular support plate; an overflow weir is formed after the overflow pipe is fixed in the overflow pipe hole; and positioning parameters for all parts are provided. The problem that a traditional fluidized bed is low in vulcanization quality is solved. The vertical sieve plate for the fluidized bed provided by the invention has the advantages that the vertical sieve plate is free from airbubbles, gas has many opportunities to contact with solid materials in the fluidized bed, the utilization rate of space in the fluidized bed is obviously increased, the fluidizing state is excellent, the fluctuation in laminated pressure drop is small, the operation is stable and the processing capacity is large.

Description

Technical field [0001] The invention relates to an internal component used in a fluidized bed. Background technique [0002] The fluidized bed has been widely used in industry due to its good heat and mass transfer performance and a fluid-like particle transportation method. Gas-solid fluidized bed is the most widely used fluidized bed, but due to the existence of bubbles, it is easy to cause gas short circuit, which makes the gas flow seriously deviate from the plug flow, and has a significant impact on the reaction. At the same time, the solid particles in the gas-solid fluidized bed are seriously backmixed. When the solid particles need to be removed continuously, the residence time of the particles in the reactor will be unevenly distributed, and the average conversion rate at the outlet of the solid particles will decrease. [0003] In order to break the bubbles, inhibit the aggregation of bubbles and particle agglomeration, and improve the quality of fluidization; reduce the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24B01J8/34
Inventor 董群张健伟祝宝东
Owner NORTHEAST GASOLINEEUM UNIV
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