A multi-impeller mixed flow field slurry preconditioner driven by slurry pipeline pressure

Abstract

The invention relates to the field of coal slurry pretreatment, in particular to a multi-impeller mixed flow field slurry preprocessor driven by the pressure of a slurry pipeline. The equipment includes a mixing box, a main shaft and a driven shaft; the driving gear is coaxially arranged on the main shaft, and the driven gear is arranged on the driven shaft to form a meshing relationship; the driving turbine is coaxially arranged on the main shaft; A group of stirring impellers, the driven rotating shafts are coaxial and fixed with a set of stirring wheels at the same height as each other; in the vertical direction, the projections of the stirring impellers and the stirring wheels intersect; a guide sleeve is set directly below the driving turbine; Guide vanes are arranged in a vortex shape inside the sleeve, and the rotation direction of the mixed liquid guided by the guide vanes is the same as the rotation direction of the stirring impeller directly below. This equipment can play a very good conditioning effect on the floating coal slime, especially suitable for the slurry modification and upgrading of difficult-to-float fine-grained coal. It has high working efficiency and the pretreatment process is fast and convenient.

Description

technical field [0001] The invention relates to the field of coal slurry pretreatment, in particular to a multi-impeller mixed flow field slurry preprocessor driven by slurry pipeline pressure for high-ash refractory fine-grained coal slurry adjustment and upgrading. Background technique [0002] Because the buoyancy of coal slime in our country is generally poor, coal slurry pretreatment is an indispensable link in the flotation coal preparation process, and it is a prerequisite for the flotation machine to obtain good technical and economic indicators. The necessity of coal slurry pretreatment mainly includes the following four points: 1) Fully disperse the flotation agent (non-polar oil collector and foaming agent), the flotation agent of coal slime is insoluble or slightly soluble in water, Only by fully dispersing it into a large number of tiny droplets can it be uniformly mixed into the coal slurry; 2) Mix the dispersed flotation agent well into the floating coal slurr...

AI Technical Summary

Problems solved by technology

As a relatively advanced coal slurry pretreatment device in the field, the flotation agent droplets are an order of magnitude smaller than the emulsified and dispersed droplets, and the dispersion effect is better; The dispersing effect of the medicine is achieved by the rotation of the fogging disc, which often requires a closed box to form a closed space to avoid the meaningless drift of the mist medicine, but the formation of the closed environment often causes problems such as fogging The working environment of the disc is poor, so it is easy to send product failures, it is impossible to realize the intuitive observation of the slurry mixing process, and it is difficult to find out the faults in time, which brings troubles to the on-site operation and maintenance work; in addition, the high-speed rotating fogging disc, The requirements for the speed of the drive motor are too high, that is, a secondary motor with a speed of up to 3000 rpm must be used to ensure its working performance, which poses severe challenges to the actual assembly, purchase and maintenance costs.

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