Thickening apparatus
AssigneeThe Bauer Bros. Co.
InventorMarvin E. Ginaven
Life of this patent
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Abstract
Separating and thickening apparatus, particularly advantageous for use in processing pulp, characterized by an apertured duct preferably of U-shape and rectangular cross-section. The duct is distinguished by closely spaced walls and incorporates removable screen segments which are readily accessible and easily replaced. The apparatus is so contrived to enable a highly efficient, high capacity, dewatering or thickening structure which requires no moving parts.
Claims13
A thickener in a system flowing solids in a slurry form under pressure and in a relatively large volume, said thickener being enclosed to express fluids under conditions of non-exposure to the atmosphere by a housing having lower and upper ends and providing at the lower end an inlet and an outlet and a drain for expressed fluids, a relatively thin slurry being admitted to said housing by way of said inlet and discharging in a thickened form from said outlet, said thickener including a continuous unobstructed duct structure within said housing including vertically oriented up and down duct sections communicating at respective lower ends with said inlet and said outlet and comprising screen walls in relatively closely spaced approximately parallel relation bridged at their lateral extremities by short interconnecting walls to provide for the slurry to move therein in a thin sheet-like flow, said vertical duct sections extending upwardly within the housing toward the upper end thereof and having adjacent of their ends to one end thereof interconnected by an imperforate generally arcuate duct section which provides for a direction reversing continuous slurry flow from one to the other of the vertical sections of said duct, slurry flow through a part of said duct being opposed by gravity forces, and portions of said vertical duct sections being perforate for an expression of fluids into said housing, expressed fluids flowing to said drain and exiting from said housing thereby.
Dewatering and thickening apparatus particularly applicable to a pulp slurry comprising a continuous duct including a plurality of generally vertically oriented sections arranged in adjacent, relatively closely spaced relation, with each of said sections being connected to the adjacent of said sections by an arcuate duct section, said duct sections being unobstructed and forming thereby a smoothly continuing flow path for use in separating the components of a slurry comprised of liquids and solids which is flowed therethrough under pressure, said vertical duct sections embodying wall portions provided by screen structure including means defining apertures which are laterally extended in a sense transverse to flow and arranged thereby to smoothly and quickly separate substantial amounts of liquid from peripheral portions of the slurry flow through the apertures defined thereby.
Dewatering and thickening apparatus particularly applicable to a pulp slurry comprising a duct structure defining a continuing flow path, said duct structure including opposite closely spaced approximately parallel wall portions embodying screen-like wall structure, which portions are bridged at their lateral extremities by short relatively widely spaced wall portions to provide a cross section to said flow path inducing the slurry to move therethrough in a fast moving, thin layered, sheet-like flow, the configuration of said screen-like wall structure being such to induce the rapid exit from said duct structure of substantial amounts of liquid from the peripheral portions of said flow.
Dependencies are inferred from the claim text.