Fine-grain material centrifugal filtering and dewatering device

Abstract

A fine-grain material centrifugal filtering and dewatering device comprises a frame, a housing, a motor, a drum and a speed regulator. A spindle of the motor penetrates the bottom of the housing to be connected with the drum, the spindle penetrates the housing to be provided with a sealing component, the upper portion of the housing is provided with an upper housing cover, the lower portion of the housing is provided with a liquid discharge outlet, the side wall of the drum is provided with a plurality of filtrate holes, and filter medium is attached to the inner wall of the drum. The upper portion of the drum is provided with an upper drum cover, the housing is provided with a feed pipe penetrating the upper housing cover and the upper drum cover to enter the drum, a mechanical sealing component is arranged at an inlet of the upper drum cover, the feed pipe is respectively provided with a suspension liquid feed system and an air feed system through pipelines, and the pipelines are provided with flow control valves. By coordinating pressurized filtering and centrifugal filtering, filtering speed can be accelerated by centrifugal force, dewatering speed is accelerated by compressed air, therefore dewatering process of a centrifugal filter is enhanced, solid-liquid separation efficiency is improved, residual water in centrifugal filter cakes is reduced and centrifugal dewatering effect of fine-grain materials is improved.

Description

technical field [0001] The invention relates to the technical field of solid-liquid separation, in particular to a centrifugal filter dehydration device for fine-grained materials. Background technique [0002] Centrifugal filters are widely used in food, medicine, chemical industry, petroleum, metallurgy, coal and other industries. In the field of processing coal, metallic minerals and non-metallic minerals, solid-solid separation methods, such as screening, magnetic separation, electric separation, air heavy medium separation, etc., can be used to separate useful minerals from other minerals. However, mineral sorting and processing are usually carried out in aqueous media. The washing process inevitably increases the moisture content of the product, and the moisture content of the product has many adverse effects on its transportation, processing, and utilization. From the point of view, dehydration of products after selection is an essential link in the process of minera...

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Problems solved by technology

[0012] In the deliquoring stage of centrifugal filtration, under the condition that there is no positive pressure difference on both sides of the filter cake, the centrifuge can obtain a strong centrifugal force through high-speed rotation. When the centrifugal force is greater than the combined force of capillary resistance, negative pressure resistance and flow drag, the filter cake It can still remove water, but it needs to consume a lot of electricity and high maintenance costs to obtain lower filter cake moisture. This dehydration method will cause high energy consumption and high maintenance costs.

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