Fluidized bed device used for wide screening of particles

Abstract

The invention relates to a fluidized bed device used for wide screening of particles. The fluidized bed device comprises a fluidized bed body and a plurality of wind chambers which are arranged inside the fluidized bed body side by side. The first wind chamber is arranged below a feeding inlet. The fluidization wind speeds of all the wind chambers are gradually decreased with the increase of the distances between the corresponding wind chambers and the feeding inlet. A tail overflowing port is arranged above the last wind chamber. Compared with the prior art, the fluidized bed device can continuously screen a large number of particles, the wind speeds of the different wind chambers are controlled according to the particle size of the particles entering the corresponding wind chambers under the condition that the wind chambers are well determined so that the particle size of the particles overflowing to the next wind chamber can be controlled. According to the specific gravity of the different kinds of particles, the fluidizing speed and the overflow plate height can be adjusted aptly, and thus the different kinds of particles can be screened flexibly.

Description

technical field [0001] The invention relates to a fluidized bed, in particular to a fluidized bed device for particle wide screening. Background technique [0002] The sieving of homogeneous particles with different particle sizes and the sieving of heterogeneous particles have always been the topic of scientific research and exploration. The sieving of heterogeneous particles is relatively easy to separate particles due to differences in their density and other factors. For the sieving of homogeneous particles, there are no good measures that can be used in large-scale applications. The traditional mechanical sieve has a good effect on the screening and separation of coarse and fine particles, but it is not easy to distribute in large quantities and the sieve holes are easily blocked. In recent years, more and more attention has been paid to the use of fluidized bed technology for particle sieving, and the purpose of controlling particle fluidization is achieved by contro...

AI Technical Summary

Problems solved by technology

However, these have not been widely used. Coarse particles cannot be removed from the air chamber in time, and the accumulation of coarse particles on the air distribution plate may easily cause the dead bed phenomenon of the fluidized bed.

Although the speed control is too high, the whole material can be well fluidized, but due to particle entrainment or coercion, fine particles are entrained with coarse particles, making it difficult to separate

Although there are many reports on the Internet about sieving and fluidized bed sieving, there are also many reports in related literature, but there is no reasonable device that can be used for expansion

Explain that fluidized bed screening technology is still a difficult problem

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