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Fluidized bed and process for covering flaky material in vapor phase method

A technology of sheet material and coating material, applied in the field of fluidized bed, can solve the problems of difficult ultra-fine sheet material, material sticking to the pipe wall, and poor coating quality, so as to improve coating efficiency and maintain pressure. drop, the effect of uniform gas distribution

Active Publication Date: 2018-04-24
浙江瑞成新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fluidized bed reactor tends to cause the material to stick to the tube wall under high flux, resulting in uneven fluidization, and the coating quality is not high during the coating process of the sheet material
[0006] At present, there are relatively few fluidization technologies that can better realize the fluidization of ultra-fine flake materials with a fluidized bed, because ultra-fine flake materials are difficult to fluidize, and this type of material has strong adhesion. , it is easy to generate electrostatic adsorption in the bed, stick to the tube wall or adsorb into agglomerates or form a fluidized dead zone, making it difficult to achieve stable fluidization

Method used

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  • Fluidized bed and process for covering flaky material in vapor phase method
  • Fluidized bed and process for covering flaky material in vapor phase method
  • Fluidized bed and process for covering flaky material in vapor phase method

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Experimental program
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Effect test

Embodiment 1

[0055] Embodiment 1 A kind of U-type fluidized bed that is used for gas-phase method coating sheet material

[0056] A fluidized bed, the overall fluidized bed is U-shaped, which can be a pair of U-shaped or a combination of multiple pairs of U-shaped, and the cross-section of the U-shaped fluidized bed is circular, square, triangular, oval, One of the regular polygons; one upper port of the U-shaped fluidized bed is closed, and the other upper port is a switchable opening used as the feeding port 9; the two outer surfaces of the U-shaped fluidized bed are symmetrical A coating material inlet 5 is provided, and the coating material inlet 5 is 0.2 to 0.3 times the cross section of the U-shaped fluidized bed reaction chamber 3; the lower end of the U-shaped fluidized bed is provided with a fluidized gas inlet port 1;

[0057] The vertical reaction chamber 3 on both sides of the U-shaped fluidized bed is fixed with a gas distributor 4 whose maximum cross-sectional area is equal ...

Embodiment 2

[0060] Embodiment 2 utilizes the technique of the fluidized bed coating flake mica of embodiment 1

[0061] a. Take by weighing 450g average particle diameter of 30 μ m, diameter-thickness ratio is 31 flake mica (shape is conical or cylindrical), put the fluidized bed reactor through the detachable feeding port 9 at the upper end of the fluidized bed reactor In cavity 3;

[0062] b. Inject fluidizing gas nitrogen from fluidizing gas inlet 1, determine the flow rate through the pressure gauge, and adjust the fluidizing gas flow to 4.0m 3 / h, so that the flake mica is in suspension;

[0063] c. Adjust the temperature of the heating furnace body to 550°C, so that the reactor cavity 3 is at a stable temperature;

[0064] d. Liquid orthosilicate is sucked into the liquid vaporizer from the liquid storage tank through the liquid sampling pump, and after being vaporized at 170°C, it is passed into the fluidized bed reactor from the coating raw material inlet 5 at a speed of 1.0g / mi...

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Abstract

The invention relates to a U-shaped fluidized bed, in particular to a surface-covered flaky material using chemical vapor phase deposition method in a fluidized bed, which relates to the technical field of surface modification of materials. The fluidized bed is in a U shape, one end of a U-shaped pipe is closed, and one end is opened; the wall of a U-shaped reaction cavity (3) is provided with a micro fan blade (2) capable of exchanging gas with the reaction cavity (3), a spherical gas distributor (4) is arranged in the reaction cavity (3), a perforation rate of an upper part of the reaction cavity is kept at 80 percent or more, and the gas distributor (4) is connected with the micro fan (2) in a buckling manner by virtue of a fixed plate (8). The fluidized bed can solve the problems for simultaneously vulcanizing and covering the materials in different particle sizes and improving the covering efficiency, can also solve the problem of the adsorption clustering of the flaky material, and can improve the dispersity of the flaky material, so that the vulcanization quality of the flaky material can be improved, and the chemical vapor covered material is more homogenous and compacter.

Description

technical field [0001] The invention relates to the technical field of fluidized beds, in particular to a U-shaped fluidized bed and a process for coating sheet-shaped materials by a gas-phase method. Background technique [0002] A fluidized bed suspends a large number of solid particles in a moving fluid, so that the particles have some apparent characteristics of the fluid. This fluid-solid contact state is called solid fluidization, that is, a fluidized bed. In the fluidization process, due to the high surface area to volume ratio of fine particles, the fluidized bed has high heat transfer and high mass transfer coefficients. Fluidized beds are widely used in various types of industrial processes, such as reaction, drying, mixing, granulation, and cooling. [0003] Coated sheet material is a nano-scale ordered assembly structure formed by one micro-nano material covering another nano-material through chemical bonds or other forces. This coated sheet material belongs to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24B01J8/38B01J8/18C23C16/442
CPCB01J8/1818B01J8/24B01J8/38C23C16/442
Inventor 袁占辉张其兴宋剑斌张明昕
Owner 浙江瑞成新材料股份有限公司