Solid-liquid separation device and solid-liquid separation method

Abstract

Provided are a solid-liquid separator and a solid liquid separation method. The solid-liquid separator can increase adhesion of a particle solid and separate a particle solid from a nonwoven fabric efficiently at the time of washing. The solid-liquid separator comprises a storage tank for storing a treatment liquid; a separation part which is provided with a separation vessel in which the treatment liquid is supplied from the storage tank, making the particle solid adhere by immersing a nonwoven fabric unit which is made plate-like on both sides of the resin net with the nonwoven fabric in thetreatment liquid in the separation vessel, and moving the nonwoven fabric in the direction of a rear surface, after making the treatment liquid in which a particle solid is reduced overflow, making the air bubbles and the pre-liquid generated in the separation vessel to collide with the nonwoven fabric and dispersing the separated particle solid in the treatment liquid to form a concentration slurry; a slurry storage tank for storing the concentration slurry discharged from the separation vessel; and a filter separator for discharging the filtered water passing through a filter of a sheet shape to the outside of the tank to obtain a dewatering cake.

Description

technical field [0001] The invention relates to a solid-liquid separation device and a solid-liquid separation method. Background technique [0002] A chemical conversion treatment (zinc phosphate treatment) for forming a zinc phosphate coating on the metal surface is performed as a pre-painting treatment for automobile bodies and the like (for example, refer to Patent Document 1). Zinc phosphate treatment is effective not only on zinc-based plated materials and aluminum alloy materials, but also on steel materials, and is suitable as a base treatment for various coatings, especially cationic electrodeposition coatings. In the zinc phosphate treatment, a large amount of chemically formed sludge mainly composed of zinc phosphate compounds is deposited on the bottom of the chemical conversion treatment tank. Since the zinc phosphate compound contains phosphorus, which is an eutrophic element, as a component, the use of the zinc phosphate compound is being avoided from the vie...

AI Technical Summary

Problems solved by technology

In this state, when turning to the dehydration process by pressurized air, the amount of filtration decreases, so it takes a very long time to process the liquid in the filter chamber

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