Liquid separating apparatus

• US 4,897,194 A
• Filed: 09/11/1987
• Issued: 01/30/1990
• Est. Priority Date: 09/11/1987
• Status: Expired due to Fees

• Current Assignee: Olson, David A.
• Original Assignee: Olson, David A.
• Inventors: Olson, David A.
• Primary Examiner(s): Alvo, Steve
• Application Number:
  US07/095,162
• Time in Patent Office: 872 Days
• Field of Search: 210/416.1, 210/446, 210/497.01, 210/499, 210/356, 210/359, 100/117, 100/116, 100/129, 100/147, 100/148, 100/191
• US Class Current: 210/359
• CPC Class Codes: B01D 2201/02 Filtering elements having a conical form
• CPC Class Codes: B01D 29/356 open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element
• CPC Class Codes: B01D 29/445 Bar screens
• CPC Class Codes: B01D 29/6476 with a rotary movement with respect to the filtering element
• CPC Class Codes: B01D 29/885 with internal recirculation through the filtering element B01D37/02 takes precedence
• CPC Class Codes: B30B 9/18 with means for adjusting the outlet for the solid

Abstract

A liquid separator to extract liquid, usually water, from a water-solid mixture. The liquid separator has a housing with an inlet and an outlet separated by a liquid extraction chamber. The housing sidewalls defining the extraction chamber are porous, and are preferably comprised as a plurality of spaced apart rails or slats. The spacing between the rails provides a porosity for extraction of water. The rails are movable inwardly and outwardly relative to the housing in order to vary the volume of the extraction chamber. Bias means are provided that normally bias the rails inwardly of the chamber. A water-solids mixture is pumped through the chamber and tends to expand the chamber against the force of the biasing means. The combination of effects upon the subject mixture is to cause water extraction through both the squeezing by the slats and the friction occassioned by the dewatering of the subject mixture.

Claims

1. A liquid separating apparatus for separating an amount of liquid from a subject mixture of discrete solid material entrained with liquid, comprising:

a housing having side wall means defining a longitudinal unobstructed liquid extraction chamber, said housing having an inlet at an upstream longitudinal end of the chamber for connection to a material moving apparatus, and an outlet at a longitudinal downstream end of the chamber;

said housing side wall means having a porosity generated by a plurality of elongate generally longitudinal openings that are open between the chamber and the outside;

portions of the side wall means toward the outlet end of the housing being movable relative to one another inward and outward of the chamber to vary the volume of the chamber;

elastic type bias means holding the side wall means and acting upon the side wall means to bias said movable side wall means portions toward a position inward of the chamber for exertion of a bias force in an inward direction upon outward deflection of the side wall means whereby when subject mixture is moved into the chamber under the influence of the material moving apparatus against the force of the bias means, the subject mixture is squeezed causing entrained liquid to be removed from the subject mixture.

2. The liquid separating apparatus of claim 1 wherein:

said movable side wall means portions are comprised of parallel, spaced apart, longitudinal slats having longitudinal, unobstructed openings between them to generate said porosity.

3. The fluid separating apparatus of claim 2 including:

means pivotally connecting the upstream ends of the slats with respect to the housing for movement of the downstream ends of the slats inwardly and outwardly relative to said chamber.

4. The liquid separating apparatus of claim 1 wherein:

said side wall means is comprised as a plurality of parallel, longitudinal slats that are movable relative to one another spaced apart to form said longitudinally openings unobstructed for substantially the length of the chamber, said slats being arranged in a generally cylindrical orientation forming said chamber.

5. The liquid separating apparatus of claim 4 wherein:

said bias means is comprised as an elastic ring surrounding said slats.

6. The liquid separating apparatus of claim 4 wherein:

said bias means is comprised as a plurality of elastic rings surrounding said slats and being longitudinally movable with respect to said slats in order to vary the force of the biasing means.

7. The liquid separating apparatus of claim 4 wherein:

said slats are pivotally connected at the upstream end near said inlet opening for pivotal movement about an axis perpendicular to the longitudinal axis of the chamber and for movement of the downstream ends inward and outward of said chamber to vary the volume of the chamber.

8. The liquid separating apparatus of claim 7 wherein:

said bias means is comprised as an elastic ring surrounding said slats.

9. The liquid separating apparatus of claim 7 wherein:

said bias means is comprised as a plurality of elastic rings surrounding said slats and being longitudinally movable with respect to said slats in order to vary the force of the biasing means.

10. The liquid separating apparatus of claim 1 wherein:

said movable side wall means portions are comprised of parallel, spaced apart longitudinal slats arranged in coplanar relationship and mounted about pivot means located adjacent said inlet for pivotal movement of the downstream end inward and outward of said chamber.

11. The liquid separating apparatus of claim 10 including:

a fixed side wall portion in opposed relationship to the movable side wall slats and comprised as a second plurality of parallel, coplanar, longitudinal slats spaced apart to form longitudinal openings.

12. The liquid separating apparatus of claim 11 wherein:

said bias means includes a helical spring assembly acting on the movable wall portion.

13. The liquid separating apparatus of claim 12 including:

a shroud surrounding the side wall means.

14. A liquid separator apparatus for separating an amount of liquid from a subject mixture of descrete solid material entrained with liquid, comprising:

a housing having a side wall defining a longitudinal unobstructed liquid extraction chamber, said housing having an inlet for inlet of subject mixture at an upstream longitudinal end of the chamber, said inlet adapted for connection to a material moving apparatus, and an outlet at a longitudinal downstream end of the chamber;

said housing side walls formed of a plurality of elongate parallel, spaced apart rails assembled in movable relationship to one another, longitudinally orientated and cylindrically arranged having upstream ends at the chamber inlet and downstream ends at the chamber outlet;

means pivotally connecting the upstream ends of the rails for pivotal movement about axes perpendicular to the longitudinal axis of the chamber permitting pivotal movement of the downstream ends of the rails inward and outward relative to the chamber to vary the volume of the chamber; and

elastic type bias means holding said downstream ends of the rails to bias them toward a position inward of the chamber for exertion of a bias force in an inward direction upon outward deflection of the rails occasioned by movement of subject mixture whereby when subject mixture is moved into the chamber under the influence of the material moving apparatus against the force of the bias means, the subject mixture is squeezed causing entrained liquid to be removed from the subject mixture.

15. The liquid separator apparatus of claim 14 wherein:

said bias means is an elastic ring positioned in surrounding relationship to the rails and longitudinally adjustable in position on said rails.

16. The liquid separator apparatus of claim 14 wherein:

said bias means is comprised of a plurality of elastic rings positioned in surrounding relationship to said rails.

17. The liquid separator apparatus of claim 14 wherein:

said housing has an inlet flange;

a plurality of pivot lugs on said flange facing downstream;

pivot pin means pivotally connecting the upstream ends of each rail to one of the pivot lugs.

18. The liquid separator apparatus of claim 17 wherein:

said rails are comprised as slats that are rectangular in cross-sectional shape.

19. The liquid separator apparatus of claim 18 wherein:

said bias means is comprised as an elastic ring positioned in surrounding relationship to the slats.

20. The liquid separator apparatus of claim 19 wherein:

said elastic ring is longitudinally adjustable in position with respect to said slats.

21. The liquid separator apparatus of claim 19 wherein:

said rails are rectangular slats with a cross-sectional length dimension greater than the cross-sectional width.

22. The liquid separator apparatus of claim 21 wherein:

said slats are orientated with the cross sectional length disposed in a radial direction.

23. The liquid separator apparatus of claim 14 wherein:

said rails are comprised as slats with a rectangular cross-sectional shape, having a cross-sectional length and cross-sectional width smaller than the cross-sectional length.

24. The liquid separator apparatus of claim 23 wherein:

said housing includes an inlet flange providing a mounting lip;

each slat having a notch located proximate the upstream end and inwardly facing, the notch of each flange being in engagement with the lip of the inlet flange and having a dimension to loosely fit on the lip of the inlet flange to permit limited pivotal movement of the downstream end of the slat.

25. The liquid separator apparatus of claim 24 including:

a retaining ring located in surrounding relationship to the slats opposite the notches on the upstream ends.

26. The liquid separator apparatus of claim 25 wherein:

one of said slats is fixed in place, the remaining slats being movable relative to the fixed slat.

27. The liquid separator apparatus of claim 26 including:

drainage openings formed in selected slats.

28. The liquid separator apparatus of claim 26 wherein:

said bias means is comprised of at least one elastic ring positioned in surrounding relationship to said slats.

29. The liquid separator apparatus of claim 28 wherein:

said elastic ring has a plurality of notches, a portion of each slat being accommodated in one of said notches.

30. The liquid separator apparatus of claim 24 wherein:

said liquid extraction chamber is generally horizontally orientated with the inlet generally horizontally spaced from the outlet, and including an anchor slat fixed in position relative to the other slats having an upstream end fixed to the inlet flange mounting ring, and a downstream end parallel to the other slats.

31. The liquid separator apparatus of claim 30 including:

a shroud in covering relationship to at least a portion of the extraction chamber.

32. The liquid separator apparatus of claim 30 including:

upstream stand means fixed to an upstream end of the fixed slat, and downstream foot means connected to a downstream portion of the fixed slat to support the housing.

33. The liquid separator apparatus of claim 32 wherein:

said bias means includes at least one elastic ring.

34. The liquid separator apparatus of claim 32 including:

a rigid retainer ring in surrounding relationship to the slats at the downstream ends opposite the notches.

35. The liquid separator apparatus of claim 34 wherein:

said bias means includes at least one elastic ring positioned in surrounding relationship to said slats.

36. The liquid separator apparatus of claim 35 wherein:

said elastic ring is longitudinally adjustable with respect to the slats.

37. The liquid separator apparatus of claim 36 including:

a shroud positioned in covering relationship to at least a portion of the housing.