Device and method for measuring stress of coal particle in concentrated phase gas-solid fluidized bed

Abstract

The invention discloses a device and method for measuring stress of a coal particle in a concentrated phase gas-solid fluidized bed, belonging to the device and the method for measuring the stress of the coal particle. The device comprises a gas-solid fluidized bed, an air distributing chamber, an air flow distribution plate, a flexible rope and a high-precision contact tension device, wherein high-density magnet mineral powder is put in a gas-solid fluidized bed body statically, compressed air is fed into the gas-solid fluidized bed after being uniformly distributed through the air flow distribution plate through the air distribution chamber, after a fluidizing state is stabilized, the coal particle is tightly connected with the flexible rope and irregularly moves in the fluidized bed, stress information is measured by the high-precision contact tension device in real time, a voltage signal is converted into a mechanical signal through a signal converter, and then the mechanics signal is transmitted to a data acquisition and output device and is displaced on a data signal display after being processed by the stress information. The device and method have the advantages of simple structure, convenience in operation, easiness in control, high measurement precision and good reliability, capability of realizing accurate stress measurement of multiple large-size particles in a concentrated gas-liquid multiple-phase flow, and wide application range.

Description

technical field [0001] The invention relates to a force measuring device and method for coal particles, in particular to a force measuring device and method for coal particles in a dense-phase gas-solid fluidized bed. Background technique [0002] my country's coal resources are mainly distributed in arid and water-deficient areas such as Shanxi, Shaanxi, Inner Mongolia, and Xinjiang. It is very difficult to adopt wet coal preparation technology. Therefore, it is imminent to develop and promote high-efficiency dry coal preparation technology. The dense-phase high-density fluidized bed based on gas-solid multiphase flow has the advantages of wide application range, high separation efficiency, and low environmental pollution, and is gradually applied in the field of dry coal preparation. The fluidized bed mainly forms a quasi-dispersed bubbling fluidized bed with uniform and stable density at each point in the bed through sufficient contact and steady-state flow of the gas-sol...

AI Technical Summary

Problems solved by technology

At present, there are few researches on the force measurement of large-sized particles in dense gas-tight multiphase flow, and only a few literatures report methods for estimating the force on particles with the help of external force fields, such as the use of external magnetic or electric fields to Indirect measurement of particle force, etc., but the measurement accuracy and reliability are low

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