Fluidized bed capable of organizing ultrafine particles to be mixed in orderly manner

Abstract

The invention discloses a fluidized bed capable of organizing ultrafine particles to be mixed in an orderly manner. The fluidized bed comprises a flow guiding pipe arranged in the middle of an outer cylinder, a grid-type baffle arranged in an annular area located between the flow guiding pipe and the outer cylinder, an air distribution plate arranged under the flow guiding pipe and the grid-type baffle, and a central jet pipe corresponding to the flow guiding pipe and arranged in the middle of the air distribution plate. The fluidized bed disclosed by the invention can organize the ultrafine fluidized bed particles to be mixed in the orderly manner, enhance circulating flow of the particles in the bed, improve gas-solid two-phase contact efficiency, and better improve fluidization of the ultrafine particles; and the fluidized bed has stable operation and is easy to maintain.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment and relates to an ultrafine particle fluidized bed reaction device. Background technique [0002] Ultrafine particles (generally refers to particles with a size less than 10) are widely used in chemical industry, electronics, ceramics, biomedicine and other fields. Due to their high surface viscosity, ultrafine particles often exist in the form of aggregates during synthesis, transportation, and storage. Due to its good gas-solid mixing, high-efficiency heat and mass transfer, and the ability to effectively solve key problems such as the continuous and smooth removal of particles from the reactor, fluidized beds are used more and more in ultrafine particles. Such as coating functional films on the surface of ultrafine particles. However, due to the small particle size of ultrafine particles and the high viscosity between particles, channeling or other poor fluidization conditions ofte...

AI Technical Summary

Problems solved by technology

Although adding auxiliary fluidization measures to the traditional gas-solid fluidized bed can achieve the purpose of improving the fluidization of ultrafine particles to a certain extent, from the perspective of particle mixing, uniform expansion fluidization is not conducive to particle mixing

In addition, in the traditional gas-solid fluidized bed, there are often a series of behaviors such as the formation, rise, growth, merger, and explosion of bubbles, which promote the strong back-mixing of the particles in the bed, which is also not conducive to the mixing of particles.

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