Venturi type multiphase fluid mixer and multiphase fluid mixing method

Abstract

The invention discloses a venturi type multiphase fluid mixer and a material mixing method. The venturi type multiphase fluid mixer comprises a sleeve (1), an upstream reducing pipe (2), a downstream increasing pipe (3), a multiphase fluid mixing cavity (4) and a feeding pipe (5); the gauge pressure at the multiphase fluid mixing cavity (4) is from -0.01 MPa to + 0.01 MPa; the multiphase fluid mixing comprises gas-liquid mixing, gas-liquid-solid mixing, liquid-liquid mixing and liquid-liquid-solid mixing; and the cross sectional area of the multiphase fluid mixing cavity (4) is larger than that of the throat part. The hydrostatic pressure at the multiphase fluid mixing cavity (4) is from micro-negative pressure to micro-positive pressure and is easy to control, so that the pressure at the throat part is not influenced by downstream equipment or pipelines and is stable, the second material is introduced into the multiphase fluid mixing cavity (4) by adopting positive pressure supply equipment, and the positive pressure of the positive pressure supply equipment can be stably controlled, and thus the amount of the second material introduced into the multiphase fluid mixing cavity (4) can be stably controlled.

Description

technical field [0001] The invention belongs to the technical field of gas-liquid mixers, and in particular relates to a Venturi type multiphase fluid mixer capable of stably controlling gas flow and a multiphase fluid mixing method. Background technique [0002] With the rapid development and widespread use of large-scale mechanized coal mining technology, the mining process of coal ore will result in ore refinement and the mixing of more fine-grained clay minerals. Mechanical coal mining equipment cannot effectively distinguish coal seams and gangue layers during operation, resulting in a large amount of fine clay ore particles and fine coal particles in the mined coal. In addition, the coal itself will inevitably contain associated minerals (such as high ridge stone, feldspar, silica, etc.), especially low-quality coal, with higher mineral impurities. The coal-water slurry produced by using the above-mentioned coal pulverization and slurry mixing naturally also contains ...

AI Technical Summary

Problems solved by technology

Although this Venturi mixer has strong pumping capacity and vigorous gas-liquid mixing, it has the following disadvantages: the negative pressure at the throat is greatly affected by the equipment or pipelines downstream of the Venturi tube, so the negative pressure at the throat is unstable , resulting in unstable air intake and large fluctuations in the gas-liquid mixing ratio, which is not conducive to the stable operation of the subsequent foam flotation column

In addition, the existing multiphase flow mixer has poor mixing effect. When it is specifically applied to the mineralization of coal-water slurry, the mineralization effect of coal-water slurry is poor. The coal-water slurry mineralized by the traditional mixer The surface of combustible particles containing carbon-hydrogen can only adhere to larger bubbles, which leads to poor separation effect of subsequent combustible particles containing carbon-hydrogen and mineral particles, and the recovery rate of combustibles after separation is too low

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