Fluid distributor of liquid-solid fluidized bed separating and classifying equipment

Abstract

Fluid distributor of liquid-solid fluidized bed separating and classifying equipment mainly comprises a valve, a main fluid distribution pipe, an annular branch pipe, straight branch pipes, buffer fluid distribution plates, material discharging fluid distribution plates and a lower barrel body. The main fluid distribution pipe is connected with the lower barrel body through the annular branch pipe and a plurality of straight pipes distributed with equal included angles. A plurality of buffer fluid distribution plates with vertical direction distribution holes and a plurality of inverted-tapered material discharging fluid distribution plates are arranged on the horizontal position, higher than the main fluid distribution pipe, in the lower barrel body. A bottom fluid material discharging pipe is located in the center of the lower barrel body, penetrates through all the buffer fluid distribution plates and is wedged with a bottom fluid material discharging valve on the outer side of the bottom of the lower barrel body. The fluid distributor has the advantages of providing even and stable uprising water flow, supporting bed layer weight and discharging bottom flow in a fluidized mode, is simple and compact in structure, good in stability, convenient and quick to operate, capable of greatly improving the evenness and the stability of uprising water flow and the bottom flow output emission capacity of the liquid-solid fluidized bed separating and classifying equipment.

Description

technical field [0001] The invention relates to a fluid distributor for a liquid-solid fluidized bed, in particular to a fluid distributor for liquid-solid fluidized bed sorting and grading equipment suitable for the sorting and grading of 1-0.25mm fine-grained minerals. Background technique [0002] The liquid-solid fluidized bed separator is a kind of enhanced gravity field separation and classification equipment, which can effectively realize the separation and classification of 1-0.25mm fine particle minerals, and has successfully realized industrialization. Its sorting mechanism: under the action of rising water flow, the material forms an interference fluidized bed with a certain density gradient, and separates based on the difference in particle size and density of particle interference settling velocity; low-density or fine-grained particles float up and become floating objects. High-density or coarse-grained particles sink and become sediment. The fluid distributor...

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Problems solved by technology

However, the fluid distributor has the following problems: (1) The water flow intensity of the branch pipes near the water inlet of the main pipe is greater than that of the branch pipes far away from the water inlet of the main pipe. (2) The opening direction of the branch pipe of the fluid distributor is in the horizontal direction, but the sorting process requires a uniform rising water flow, so the water flow ejected from the outlet hole needs a certain amount of time and space to be transformed into At the same time, it is inevitable that part of the fluid will be transformed into a downward flow, which is not conducive to the stability of the upward flow; (3) when the feed enters the liquid-solid fluidized bed column from the upper feed tank, it has a certain initial velocity. Due to inertia, The low-density particles that should float up will settle down for a certain distance, especially the low-density particles with coarser particle size have a longer settling distance. Once these low-density particles settle below the horizontal branch pipe of the fluid distributor, they cannot return to the fluid distribution. instead of re-sorting above the filter, but directly enter the underflow sediment and lose it in the tailings, which affects the separation effect; (4) The high-density particles are collected and discharged through the inverted conical tailings diversion groove, because the tailings diversion groove is located Below the fluid distributor, the incoming water flow has a weak effect on this part of the particles. As the sorting progresses, high-density particles continue to accumulate, and the pressure is tighter and tighter, and the moisture content is getting lower and lower, which may cause blockage of the underflow discharge port. , the underflow cannot be discharged smoothly, affecting the continuous progress of the sorting process

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