Annular fluidized bed separator of particle mixture

Abstract

The invention relates to an annular fluidized bed separator of a particle mixture. The upper end of a center lifting pipe extends into an annular fluidized bed by a certain height, so that the annular fluidized bed is divided into an annular area at the lower part and a cylindrical area at the upper part; an air inlet and a wind distribution plate are respectively arranged at the bottoms of the center lifting pipe and the annular fluidized bed; a feed port is formed in the bottom of the center lifting pipe; a heavy particle outlet is formed in the bottom of an annular area of the annular fluidized bed, and is connected with a heavy particle collecting tank; and an airflow outlet at the top of the annular fluidized bed is connected to a light particle collecting tank by a cyclone separator. The particle mixture is quickly fluidized in the center lifting pipe for primary dispersion, and is ascended along with air currents to enter the annular fluidized bed for secondary dispersion. The annular fluidized bed separator can continuously and quickly perform high-efficiency separation for light and heavy particle mixtures under the condition of normal temperature or high temperature. The annular fluidized bed separator can be coupled with a circulating fluidized bed reactor system, and can continuously and stably operate.

Description

technical field [0001] The invention belongs to the technical field of particle mixture separation, in particular to an annular fluidized bed separator for particle mixture. Background technique [0002] Separation devices for particle mixtures can be divided into mechanical and non-mechanical types. [0003] Mechanical separators, such as vibrating screen machines, etc. The principle of vibrating sieve is to use vibration to provide separation energy, and to separate particles of different particle sizes through the screen. The cost is low and the process is simple, but it cannot separate two kinds of particles with similar particle sizes and different particle densities. In addition, the screening is not sufficient , long-term vibration drying, easy to cause particle breakage. Other types of mechanical separators are mainly based on the particle size and density of the particles, and the particles are separated by centrifugation. Generally speaking, mechanical particle ...

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Problems solved by technology

The separation process still has the problem of low particle separation efficiency. The main reason is that the particle group is not fully dispersed in the classifier, and the collision between particles is relatively severe, thereby reducing the separation effect of the classifier.

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