Sieve Shaker Helps You Seperate Things

The present invention relates to a sieve shaker

, a basket therefor, screen assemblies therefor and a method for separating material using a sieve shaker of the invention.

Vibratory separators are used in a wide variety of industries to separate materials such as liquids from solids or to grade particles. Typically such separators have a basket mounted in or over a receiving receptacle and vibrating apparatus for vibrating the basket. One or more screens is mounted in the basket. Material to be treated is introduced to the screen(s). Separated material (e.g. liquid and/or smaller solids) flows through the screen(s) into the lower receptacle and separated larger solids (with or without liquid) move down and off the screen(s).

Typically, the screens used with sieve shaker is emplaced in a generally horizontal fashion on a generally horizontal bed or support within a basket in the shaker. The screens themselves may be flat or nearly flat (i.e. substantially two-dimensional); or, due to corrugated, depressed, or raised surfaces, are three-dimensional. The basket in which the screens are mounted may be inclined towards a discharge end of the shake shaker. The sieve shaker imparts a rapidly reciprocating motion to the basket and hence the screens. Material from which particles are to be separated is poured onto a back end of the vibrating screen. The material generally flows toward the discharge end of the basket. Large particles are unable to move through the screen, remain on top of the screen, and move toward the discharge end of the basket where they are collected. The smaller particles and fluid flow through the screen and collect in a bed, receptacle, or pan beneath the screen.

Sieve shaker or screen capacity is typically determined by the position of a fluid-end point. The fluid end-point is the point where the fluid pool stops on the screen surface near the shaker's discharge end. This is particularly noticeable when the basket is inclined to the discharge end. As the fluid-end point moves closer to the discharge end, discharged solids can become too wet, risking whole mud losses over the screen.

by: ericfu

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