Gas-solid fluidized bed sorting machine based on pulse airflow

Abstract

The invention discloses a gas-solid fluidized bed sorting machine based on pulse airflow. The gas-solid fluidized bed sorting machine mainly comprises a sorting groove, an air distributing plate, a dedusting cover and a support, wherein the tail end of the sorting groove is provided with a light product material discharge wheel; the tail end of a rear air distributing chamber is provided with a rear heavy product material discharge wheel; the tail end of a front air distributing chamber is provided with a front heavy product material discharge wheel; the bottom parts of the rear air distributing chamber and the front air distributing chamber are respectively provided with a rear air tube and a front air tube; the rear air tube and the front air tube are connected with an air inlet tube through a three-way connector; and the air inlet tube is provided with a pulse airflow generator and an airflow quantity regulating valve in sequence. According to the invention, the pulse airflow is introduced into a gas-liquid fluidized bed, materials are conveyed forward relying on the oblique angle of the sorting groove and the effect of the pulse airflow; floating materials and sediment materials are respectively discharged through the light product material discharge wheel and the heavy product material discharge wheels, and the medium circulating quantity is reduced effectively; and the height of a front support leg can be adjusted, the front support leg can be used for regulating the oblique angle of the sorting groove, the regulation of coal conveying speed and sorting time can be realized.

Description

technical field [0001] The invention relates to a gas-solid fluidized bed separator, which belongs to the field of mineral processing engineering and is especially suitable for dry physical separation of coal. Background technique [0002] At present, the equipment used for coal dry separation includes air heavy medium fluidized bed separator and compound dry separation machine. Among them, the air heavy medium fluidized bed separator is equipped with a moving scraper conveyor to realize the transportation and discharge of floating and sunken objects. The movement of the scraper will affect the stability of fluidization, resulting in the return of stratified materials. Mixing will reduce the sorting efficiency. At the same time, when the scraper moves close to the air distribution plate, it will grind the material between the air distribution plate and the scraper, which increases the wear of the air distribution plate and the scraper, causing the air distribution plate hol...

AI Technical Summary

Problems solved by technology

Among them, the air heavy medium fluidized bed separator is equipped with a moving scraper conveyor to realize the transportation and discharge of floating and sunken objects. The movement of the scraper will affect the stability of fluidization, resulting in the return of stratified materials. Mixing will reduce the sorting efficiency. At the same time, when the scraper moves close to the air distribution plate, it will grind the material between the air distribution plate and the scraper, which increases the wear of the air distribution plate and the scraper, causing the air distribution plate plugging phenomenon

The effective separation particle size of the air-dense medium fluidized bed separator is 50-6mm, and the separation effect on fine-grained coal of -6mm is poor, and it cannot meet the separation requirements of fine-grained coal with increasing output

The compound dry sorting machine has low sorting efficiency, poor precision and narrow application range

The vibrating fluidized bed can improve the fluidization state and realize the separation of fine coal, but the vibrating fluidized bed has a large vibration mass, short equipment life and poor stability, which is not conducive to the large-scale development of equipment

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