Vibratory air dense medium fluidized bed sorting machine

Abstract

The invention provides a vibratory air dense medium fluidized bed sorting machine. According to the vibratory air dense medium fluidized bed sorting machine, an exhaust gas recovery system is adopted, high-heat exhaust gas exhausted by the vibratory air dense medium fluidized bed sorting machine is recycled, through switching of a two-position four-way valve, the exhaust gas recovery system has multiple modes of dedusting and heat preservation, and dedusting and heating, so that the quality of airflow returning to the sorting machine is guaranteed, and heat is recycled to the maximum extent; two heating devices are adopted, namely the first heating device and the second heating device which are used for heating supplied air, the facility requirement for the first heating device with large power is reduced, flexibility, high efficiency and low maintenance cost are achieved by the adoption of the second heating device, and no matter when the second heating device is arranged in a small heat-retaining circulation or in a main line of the exhaust gas recovery system, the second heating device can play a role in flexibility and high efficiency.

Description

technical field [0001] The application relates to a coal preparation equipment, in particular to a vibrating air dense medium fluidized bed separator with a waste gas recovery structure. Background technique [0002] The characteristic of the traditional air dense medium fluidized bed separator is that the air acts on the heavy medium at a certain flow rate through the air distribution structure to form a fluidized state, and its properties are similar to fluids. By adjusting the composition and particle size of the heavy medium, the fluidized bed can reach a certain density: the selected materials with different densities will stratify among themselves, the materials with lower density will float up, and the materials with higher density will sink, and the materials will be sorted by scraping The discharge mode of the slab conveyor circulating in the machine, the upper layer discharges coal, and the lower layer discharges gangue. In actual production, due to measures such ...

AI Technical Summary

Problems solved by technology

[0004] One is that its energy consumption is serious. The original air-dense medium fluidized bed is a low-energy dry coal preparation method, but after the hot air fluidized bed is introduced, heating consumes a large amount of electric energy or coal. The treatment and recovery of exhaust gas has not been studied in depth, so a large amount of heat is lost with the exhaust gas;

[0005] The second is that it is impossible to respond quickly to the humidity change of the selected coal. The air-dense medium fluidized bed has a huge capacity to process raw coal every day, and the moisture content of different batches of raw coal sometimes varies greatly. Or the response speed of cooling is not fast enough, so it often happens that the raw coal that is easy to muddy blocks the air distributor. The reason is that there is no rapid heating of hot air, and the coal drying capacity is insufficient

Moreover, excessive temperature control of the heating device will damage its inherent life, and the high-power heating equipment is expensive. Therefore, the maintenance cost of the existing sorting machine remains high.

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