Copper hydroxide sludge filter-pressing pretreatment device

Abstract

The utility model relates to the technical field of pretreatment, in particular to a copper hydroxide mud filter-pressing pretreatment device which comprises an inner cylinder and a middle cylinder, a large-aperture filter hole is formed in the middle upper portion of the side wall of the inner cylinder and located at the position of supernate, and a small-aperture filter hole is formed in the middle of the side wall of the inner cylinder and close to the height of solid-liquid layering. The middle cylinder is inserted into the outer side of the inner cylinder in a sleeving manner, the inner wall of the middle cylinder is in sliding contact with the outer wall of the inner cylinder, all the filter holes are shielded when the middle cylinder moves downwards, and at the moment, a relatively closed space is defined by the middle cylinder and the inner cylinder; at the moment, mixing, pH value adjustment and flocculation precipitation work of the slurry can be completed in the space, the middle cylinder is lifted up after layering is completed, all or part of the filter holes are exposed, supernate can be rapidly discharged, and part of liquid in a solid layer is discharged.

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