A spiral ascending flow type liquid-solid fluidized bed separation equipment and method

Abstract

Disclosed is spiral up-flow type liquid-solid fluidized bed separation equipment and method. The equipment is mainly composed of a separation chamber, a power portion and a transmission device. A cylinder made of organic glass is arranged outside the separation chamber, and a rotatable helical blade is mounted inside the separation chamber. The power portion is composed of a variable-frequency speed-governing three phase asynchronous motor and a variable-frequency speed governor. The transmission device is composed of a transmission shaft, a coupler, a bearing and a packing seal device. During separation, water flow is fed in from a water ingoing pipe, the motor drives the helix blade on the transmission shaft through the coupler to rotate together, the water flow is driven to flow upwards inside the cylinder along the helix, ore pulp is fed in from a feeding pipe, a fluidized bed is formed under the action of helical upward flow, cleaned coal is discharged from an overflow weir, tailings are discharged from an underflow pipe, and the equipment is simple in structure, convenient to operate, free of chemical agent consumption, high in separation accuracy and particularly applicable to separation of coarse slime with the diameter of 2-0.3mm.

Description

technical field [0001] The invention relates to a liquid-solid fluidized bed sorting device and method, in particular to a spiral ascending flow type liquid-solid fluidized bed sorting device and method suitable for sorting coarse coal slime with a particle diameter of 2-0.3 mm. Background technique [0002] With the improvement of coal mining mechanization, the content of fine particles in raw coal continues to increase, which brings difficulties to the slime water treatment system. At present, most of the dense medium coal preparation processes in our country adopt non-grading and non-deliming selection, and the equipment tends to be large-scale. Although this approach simplifies the process, it is not conducive to improving the separation efficiency of full-size coal, and the separation accuracy of existing equipment cannot meet the process requirements. The sorting particle size range of the dense medium cyclone is 50-0.15mm, but the production practice shows that when ...

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Problems solved by technology

The disadvantage is that the separation effect is easily affected by factors such as the particle size of the slime weight and the separation density control; the disturbance bed separator has a large processing capacity, and as far as its separation principle is concerned, the rising water flow rate is the one that affects the quality of its clean coal. The control of the bottom flow directly affects the flow rate of the rising water. The control of the bottom flow of the disturbed bed separator is automatically adjusted by the measurement of the flow rate, but the current automatic detection and control system does not Perfect, the control of the underflow cannot be completely tracked in real time, which will lead to the instability of the whole sorting process and affect the quality and yield of clean coal

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