Dewatering and compacting equipment with high pressure pumping arrangement
OwnerDennis P. Macraeinventor
Life of this patent
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Abstract
A device for the removal of solids from slurries by continuous compaction in a screen chamber. Pressure of liquid in the chamber causes continuous extrusion of a dewatered solid from an open ended chamber. The walls of the chamber may be constructed from longitudinal wedge bars spaced apart to provide filtering spaces between them. A high pressure pumping arrangement, including a first slurry pump and an auxiliary piston pump, is provided to maintain a high-pressure throughout the chamber to facilitate the continuous extrusion.
Claims11
A dewatering apparatus to dewater a slurry and to continuously produce a liquid product and a substantially solid dewatered product, the apparatus comprising an elongate screen chamber having first and second ends and defined by at least one side wall, the at least one side wall comprising a screen arrangement, slurry inlet means at said first end of the chamber and said second end of the chamber defining an exit means for solid product, and a high pressure pump arrangement adapted to pump slurry to the chamber through the inlet means under high pressure so as to exert pressure directly onto the slurry to achieve the dewatering, wherein the exit means is an opening in the end of the screen chamber and said high pressure pump arrangement being operable for maintaining a continuously sufficient pressure for substantially maintaining the high pressure onto said slurry and said substantially solid dewatered product throughout said chamber and continuously extruding said solid product through the opening.
A method of dewatering a slurry on a continuous basis to produce a solid product and a filtrate comprising the steps of utilizing a pumping arrangement for pumping a slurry under high pressure into an elongate filter chamber having at least one side wall, the filter chamber having an open exit end, causing the dewatering of said slurry by substantially maintaining the high pressure thereon throughout said filter chamber by said pumping arrangement to produce a wad of solid product, causing said solid product to build up in the chamber towards the open exit end and continuously extruding the wad from the open end by means of the high pressure exerted on the slurry within the chamber, by the pumping arrangement.
Dependencies are inferred from the claim text.