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Ultrafine particle mixing device

A technology of ultra-fine particles and mixing device, which is applied in the directions of mixer, mixing method, transportation and packaging, etc., can solve the problems of uneven mixing, difficult to mix evenly in a fluidized bed, and difficult to fluidize ultra-fine particles, and achieve good mixing. Effect

Inactive Publication Date: 2014-01-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fluidized bed has unique advantages in the fields of particle mixing and reaction. However, for ultrafine particles with a particle size of less than 100 μm, the adhesion between particles is very strong, and ultrafine particles are usually not easy to fluidize. Difficult to mix evenly, traditional fluidization technology is easy to form channel flow, difficult to achieve stable fluidization, uneven mixing

Method used

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  • Ultrafine particle mixing device

Examples

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Effect test

Embodiment 1

[0016] The mixing device of ultrafine particles of the present invention comprises a hopper 1, a screw feeder 2, a Roots blower 3, an air chamber 4, a circulating fluidized bed 5, a primary cyclone dust collector 6, a standpipe 7, a feeder 8, Secondary cyclone separator 9, bag dust collector 10 and material collector 11; wherein, circulating fluidized bed 5 is composed of low-velocity bed 12, transition section 13, and high-speed bed 14, and a dense-porous plate is arranged at the lower part of low-velocity bed 12 As the air distribution plate 17, the lower part of the air distribution plate 17 is an air chamber 4, the top of the low-speed bed 12 is connected with a transition section 13, the top of the transition section 13 is connected with a high-speed bed 14, and the top of the high-speed bed 14 is connected to the first-stage cyclone. The dust collector 6 is connected, and the bottom of the primary cyclone dust collector 6 is connected to the riser 7, and the bottom of the...

Embodiment 2

[0019] A mixing device for different ultrafine particles, such as attached figure 1 1. As shown in Example 1, a certain amount of auxiliary fluidized particles 16 (such as hollow alumina) with a particle size of 100 μm-100 mm is first added to the low-velocity bed 12 through the auxiliary fluidized particle silo 18 (with a valve on it). Then, manganese dioxide and lithium carbonate, which are materials for preparing lithium manganate with a particle size of less than 100 μm, are transported into the low-speed bed 12 through the screw feeder 2 . At the same time, fluidized nitrogen is supplied to the low-velocity bed 12 at the bottom of the circulating fluidized bed 5, and the manganese dioxide and lithium carbonate entering the circulating fluidized bed 5 are carried out in the low-velocity bed 12 under the action of the auxiliary fluidized particles 16 (hollow alumina). Steady-state fluidization and mixing under gas velocity to achieve primary mixing of manganese dioxide and...

Embodiment 3

[0021] A mixing device for different ultrafine particles, such as attached figure 1 1. As shown in Example 1, a certain amount of auxiliary fluidized particles 16 (such as solid alumina) with a particle size of 100 μm-100 mm is first added to the low-velocity bed 12 through the auxiliary fluidized particle silo 18 (with a valve on it). Keep the static bed height of auxiliary material 500-1000mm. Then, manganese dioxide and lithium carbonate, which are materials for preparing lithium manganate with a particle size of less than 100 μm, are transported into the low-speed bed 12 through the screw feeder 2 . Fluidizing nitrogen gas is supplied to the low velocity bed 12 at the bottom of the circulating fluidized bed 5, and the manganese dioxide and lithium carbonate entering the lower part of the circulating fluidized bed 5 pass through the gaps of the auxiliary fluidized particles 16 (solid alumina). The gas velocity of the fluidized gas is controlled to be greater than the term...

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Abstract

The invention discloses an ultrafine particle mixing device. An ultrafine particle mixing device system comprises a hopper, a spiral feeder, a Roots blower, an air chamber, a circulating fluidized bed, a cyclone dust collector, a vertical pipe, a material returning device, a bag-type dust collector and a material collector, wherein the circulating fluidized bed comprises a low speed bed, a transitional section and a high speed bed; a porous plate is arranged at the upper part of the air chamber as an air distribution plate; and the bag-type dust collector is connected with the cyclone dust collector. Ultrafine particles and auxiliary fluidized particles are available in the low speed bed. The auxiliary fluidized particles are added to the low speed bed through an auxiliary fluidized particle storage bin. The number of the types of the ultrafine particles is not less than two. The particle sizes of the ultrafine particles are less than 100 microns. The Roots blower supplies inert fluidizing gas which does not react with the ultrafine particles. The particle sizes of the auxiliary fluidized particles are more than 100 microns and less than 100 mm. A feeding device is the spiral feeder.

Description

technical field [0001] The invention relates to a mixing device for ultrafine particles, in particular to a mixing device for different types of ultrafine particles. Background technique [0002] Ultrafine particles have large specific surface area, good chemical reactivity and solid-solid surface reaction characteristics, and are widely used as reactants in synthesis reactions. The current process for producing ultrafine particle mixtures generally has low efficiency, low productivity levels, discontinuous production and uneven mixing, so the output and quality of ultrafine particle mixtures are greatly limited. [0003] As a raw material for chemical production, the mixture of ultra-fine particles will lead to a decline in product quality and qualified rate due to uneven mixing during the preparation process. Therefore, looking for a superfine particle mixing device with high mixing uniformity and continuous production can bring huge benefits to production. Fluidized bed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F13/02B01F3/18B01F33/40
Inventor 段钰锋杨春振刘猛
Owner SOUTHEAST UNIV
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