A method and system for weakening bubbles in a gas-solid separation fluidized bed

Abstract

The invention relates to a method and system for weakening bubbles in a gas-solid separation fluidized bed, which belongs to the technical field of gas-solid separation fluidized bed coal preparation, and solves the problem of the bed space density of the gas-solid separation fluidized bed in the prior art problem of volatility. The inventive method includes: collecting the pressure signal in the bed of the fluidized bed online, matching the characteristic behavior information of the air bubbles in the bed in the intelligent database according to the pressure signal; adjusting different areas of the air distribution plate of the fluidized bed according to the characteristic behavior information of the air bubble movement Superficial gas velocity and air bubble weakening adjustment for adjusting the negative pressure of the negative pressure column of the fluidized bed; real-time monitoring of the pressure change signal in the bed after the air bubble weakening adjustment in the bed, and calculating the bed density fluctuation standard according to the pressure change signal Difference; according to the density fluctuation standard deviation value, the bubble weakening adjustment is performed again to ensure that the density fluctuation in the fluidized bed is maintained within the preset density fluctuation standard deviation range. The stability of the required bed density is realized, and the accuracy of coal sorting is improved.

Description

technical field [0001] The invention relates to the technical field of gas-solid separation fluidized bed coal preparation, in particular to a method and system for weakening bubbles in a gas-solid separation fluidized bed. Background technique [0002] As an efficient coal dry separation technology, gas-solid fluidization separation plays a very significant role in the protection of water resources and the reduction of environmental pollution, especially for coal preparation operations in the arid / alpine regions of Northwest China. Technical advantages. As it plays an increasingly important role in the field of coal preparation, the complexity and variability of the internal space environment of the gas-solid fluidized separation system has gradually attracted widespread attention. [0003] In the actual separation process, the migration of air bubbles in the bed is a key factor that directly affects the stability of the bed density, while the bed space density of the trad...

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Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a method and system for weakening bubbles in a gas-solid separation fluidized bed to solve the problem of large fluctuations in the bed space density of the existing gas-solid separation fluidized bed. The problem of low sorting efficiency

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