Dry separation device and method of ultrasonic vibration microbubble fluidized bed

Abstract

The invention discloses a dry separation device and method of an ultrasonic vibration microbubble fluidized bed. The dry separation device comprises an air supply system and a fluidized bed body, wherein air enters an air chamber below an air distribution plate through the air supply system; the air passes through the air distribution plate and forms a stable upflow in the fluidized bed body. A material forms a fluidized bed layer under the joint action of the upflow and a vertical component force from an ultrasonic vibration force field, and is separated and layered according to density in a fluidizing process; the layered materials enter a light product collection port and a heavy product collection port respectively under the dividing effect of a discharge baffle at the tail end of the bed layer so as to obtain a light product and a heavy product. According to the invention, the fine-particle pulverized coal of -0.5mm is directly separated without dense medium, and the harmful minerals such as pyrite in coal are removed; compared with existing device, the fluidizing environment is better, the phenomena such as 'agglomeration', 'short circuit' and 'backmixing' adverse to density separation in the bed layer are eliminated, and the density separation of the fine-particle pulverized coal is promoted.

Description

technical field [0001] The invention relates to the technical field of fluidized bed separation, in particular to an ultrasonic vibration microbubble fluidized bed dry separation device and method. Background technique [0002] For -0.5mm pulverized coal, coal and minerals are fully dissociated, which creates favorable conditions for desulfurization and ash reduction of coal before combustion. At present, the separation of pulverized coal of this size is mainly carried out by flotation. Although the efficiency of the separation process is high, the flotation process is complicated and requires a large amount of water and flotation chemicals. Therefore, the dry separation It is proposed that this situation will be effectively improved, especially in arid and water-scarce areas where there is broad space for development. The current dry separation technologies mainly include heavy medium gas-solid fluidized bed separation, frictional electrostatic separation, etc. Among them,...

AI Technical Summary

Problems solved by technology

For this particle size material, due to the small particle size and poor fluidization characteristics, the current fluidized bed is difficult to sort

Images