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WO2018169496A1 - Panier de support de tamis centrifuge horizontal - Google Patents

Panier de support de tamis centrifuge horizontal Download PDF

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Publication number
WO2018169496A1
WO2018169496A1 PCT/TH2017/000022 TH2017000022W WO2018169496A1 WO 2018169496 A1 WO2018169496 A1 WO 2018169496A1 TH 2017000022 W TH2017000022 W TH 2017000022W WO 2018169496 A1 WO2018169496 A1 WO 2018169496A1
Authority
WO
WIPO (PCT)
Prior art keywords
perforated
basket
circumferential wall
sieve support
perforations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/TH2017/000022
Other languages
English (en)
Inventor
Wayne HIRD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stamex Technology Co Ltd
Original Assignee
Stamex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stamex Technology Co Ltd filed Critical Stamex Technology Co Ltd
Priority to PCT/TH2017/000022 priority Critical patent/WO2018169496A1/fr
Publication of WO2018169496A1 publication Critical patent/WO2018169496A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • B04B7/18—Rotary bowls formed or coated with sieving or filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • B04B7/12—Inserts, e.g. armouring plates
    • B04B7/16—Sieves or filters

Definitions

  • Embodiments of the present invention generally relate to centrifugal basket for horizontal centrifugals or centrifuge machines and in particular relate to a perforated centrifuge sieve support basket and a method of forming the perforated centrifuge sieve support basket including variable sized perforations all around the centrifuge sieve support basket for horizontal centrifugals or centrifuge machines.
  • Centrifugals utilize centrifugal force generated by high-speed rotations, is used to separate one type of material from another type. Centrifugation can be used to recover solids from slurries, to clarify liquids, or to clarify solids for example, solids from liquids.
  • a centrifuge machine utilizes a rapidly rotating cage or basket into which the material to be separated is placed. Centrifuge machines may be either the batch process type or the continuous process type.
  • an inverted conical shaped basket is rapidly rotated so that liquid is forced through a selectively permeable membrane or filter screen mounted internally of the conical basket and the partially dry solids are gradually forced up along the basket and out over the top into a separate container.
  • the filter screens are used to separate solids from liquids and such filter screens are not adequately strong enough to be self-supporting under operating pressure of the centrifugal machine. Therefore, common practice up to this time has been to provide a basket made of heavy and thick metal plate formed in the shape of a conical basket for supporting a filter screen in the interior of the basket.
  • the forming of the baskets from thick and heavy metal plates as heretofore encountered in the art results in an expensive operation.
  • the baskets formed from thick metal plates results into heavy baskets requiring experienced laborers or work force to handle centrifugal machine operations and thus, increasing wastage of man power and funds.
  • centrifuge support baskets which are used heretofore encountered in the art struggling for achieving strength, to avoid mechanical failures and in achieving strength factor, the support baskets become heavier to be handled by a single person. Centrifuge support baskets, which are used heretofore encountered in the art incorporating clogged filter screens within, reduces overall efficiency and throughput of centrifugal machine.
  • It is therefore an object of the invention to provide a light-weight conical shaped centrifuge sieve support basket of increased strength and stiffness with variable sized perforations all around may be used for horizontal centrifugals or centrifuge machines.
  • Another object of the present invention is to provide a centrifuge sieve support basket having increased open area for free flow of filtrate in centrifuge basket resulting in increased efficiency of the centrifugals. This is achieved by fabricating perforations, which are alike quadrilateral shaped perforations, leaving thin continuous webs all around the circumferential wall of the basket.
  • a still another object of the present invention is to provide a centrifuge sieve support basket which is an ideal support for the filter screen along closely spaced lines, thereby leading to relatively longer life of the filter screen, improved cleaning and efficient draining of liquid filtering through the screen to achieve desired separation of liquid and solid.
  • a still further object of the present invention is to provide a centrifuge sieve support basket providing uninterrupted discharge perforations throughout the circumferential wall of the basket to prevent clogging of material filtering out through the basket.
  • Embodiment in accordance with the present invention discloses a perforated centrifuge sieve support basket is provided herein.
  • the perforated centrifuge sieve support basket comprising a basket base, a basket top and an integral conical shaped perforated circumferential wall.
  • the integral conical shaped perforated circumferential wall is further secured in between basket top and basket base to form a perforated centrifuge sieve support basket.
  • the integral conical shaped perforated circumferential wall is formed by combining and rolling plurality of perforated continuous ribs.
  • the perforated continuous ribs are coupled together in abutting relationship joined with seam to form a perforated circumferential wall.
  • the perforated circumferential wall is further rolled in conical shape with its abutting end edges welded together and joined at another seam to form an integral conical shaped perforated circumferential wall.
  • the perforated continuous ribs are formed by fabricating perforations of desired size and shape on the surface of continuous ribs, using a laser cutting machine or any other type of engraving, perforating, abrasion, carving, drilling or cutting machine.
  • the perforations formed are alike quadrilateral shaped perforations which are rounded at the corners and thus forming uniform shaped perforations such as but not limited to rounded quadrilaterals, rounded rectangle, rounded square, and oval.
  • the integral perforated circumferential wall is disposed at an included angle lies in between 56 degrees and 42 degrees within the basket base and the basket top.
  • Embodiment in accordance with the present invention discloses a method of forming perforated centrifuge sieve support basket is provided herein.
  • the method includes fabricating perforations on the surface of the continuous ribs using a laser cutting machine or any other type of other engraving, perforating, abrasion, carving, drilling or cutting machine to form perforated continuous ribs.
  • the method further includes combining a plurality of perforated continuous ribs which are coupled together in any suitable manner such as but not limited to welding, riveting etc. and in present instance the perforated continuous ribs are welded together, say at one seam forming an interposed side wall at each junction and thus forming a perforated circumferential wall.
  • the method further includes rolling the perforated circumferential wall in conical shape with its abutting edges welded together at other seam fonning another interposed side wall and thus forming an integral conical shaped perforated circumferential wall.
  • the method further includes disposing the integral conical shaped perforated circumferential wall at an included angle from the base of the basket.
  • the method further includes securing top and bottom edges of the integral conical shaped perforated circumferential wall to the basket base and basket top in any suitable manner such as but not limited to welding, riveting etc. and in present instance the integral conical shaped perforated circumferential wall is welded to the basket base and the basket top to form the basket having perforated passages all around its circumferential wall.
  • the fabricating of the perforations on the surface of the continuous rib is performed by a laser cutting machine or any other type of other engraving, perforating, abrasion, carving, drilling or cutting machine to form the perforated continuous rib.
  • the shape of the perforations thereof fabricated on the surface of the continuous rib is alike quadrilateral shaped perforations.
  • the shape of the perforations thereof fabricated on the surface of the continuous rib is rounded quadrilaterals, rounded rectangle, rounded square, and oval.
  • the disposing of integral conical shaped perforated circumferential wall in between basket top and basket base is carried out by inclining the integral conical shaped perforated circumferential wall at an angle preferably lies in between 56 degrees and 42 degrees from the base of the basket.
  • Embodiment in accordance with the present invention discloses a method of cleaning the perforations of the perforated centrifuge sieve support basket is provided herein.
  • the method includes installing a back flush baffle in close proximity of the perforated centrifuge sieve support basket covering full height of the perforated centrifuge sieve support basket and thus covering entire length of filter screen enclosed within the perforated centrifuge sieve support basket.
  • the method further includes collecting filtrate filtered out through the perforated centrifuge sieve support basket.
  • the method further includes generating high turbulence on the surface of the perforated centrifuge sieve support basket to such a degree that liquid ejected with the filtrate re-enters through the perforations to clean the perforated centrifuge sieve support basket.
  • the angular nature and shape of the perforations of the perforated centrifuge sieve support basket facilitates the usage of flushing action generated by the back flush baffle for clearing the perforations of the perforated centrifuge sieve support basket.
  • Figure 1 illustrates a schematic perspective view of perforated centrifuge sieve support basket for horizontal centrifugals or centrifuge machines showing perforated centrifuge sieve support basket comprising perforations alike quadrilateral shaped perforations all along the circumferential wall of the centrifuge sieve support basket;
  • Figure 1 (a) illustrates a schematic representation of sectional view of perforated circumferential wall of centrifuge sieve support basket showing perforated circumferential wall formation by combining two perforated continuous ribs which are coupled together to form perforated circumferential wall of the centrifuge sieve support basket;
  • Figure 2 illustrates a schematic representation of top sectional view of perforated centrifuge sieve support basket for horizontal centrifugals or centrifuge machines showing perforated centrifuge sieve support basket comprising perforations alike quadrilateral shaped perforations all along the circumferential wall of the centrifuge sieve support basket;
  • Figure 3 illustrates a schematic representation of side elevation view of perforated centrifuge sieve support basket showing oval shaped perforations along the circumferential wall of the perforated centrifuge sieve support basket, and a circumferential wall segment showing oval shaped perforation being exploded and shown in enlarged perspective;
  • Figure 4 illustrates a schematic representation of side elevation view of perforated centrifuge sieve support basket showing rounded quadrilateral perforations along the circumferential wall of the perforated centrifuge sieve support basket and a circumferential wall segment showing rounded quadrilateral perforations being exploded and shown in enlarged perspective;
  • Figure 5 illustrates a schematic representation of
  • Figure 7 illustrates an exemplary flowchart depicting a method of forming a perforated centrifugal sieve basket
  • Figure 8 illustrates an exemplary flowchart depicting a method of cleaning the perforations of the perforated centrifuge sieve support basket.
  • each of the expressions "at least one of A, B and C", “at least one of A, B, or C", “one or more of A, B, and C", “one or more of A, B, or C" and “A, B, and/or C” means A alone, B alone, C alone, A and B together, A and C together, B and C together, or A, B and C together.
  • the term “a” or “an” entity refers to one or more of that entity.
  • the terms “a” (or “an”), “one or more” and “at least one” can be used interchangeably herein. It is also to be noted that the terms “comprising", “including”, and “having” can be used interchangeably.
  • Figure 1 and Figure 2 illustrates a schematic representation of perspective view and top sectional view of the perforated centrifuge sieve support basket 102 comprising perforations 110 alike quadrilateral shaped perforations all along the circumferential wall of the perforated centrifuge sieve support basket 102.
  • a conical shaped perforated centrifuge sieve support basket 102 is described herein.
  • the perforated centrifuge sieve support basket 102 comprising a basket base 104, basket top 106 and an integral conical shaped perforated circumferential wall 118.
  • the integral conical shaped perforated circumferential wall 118 is disposed in between basket base 104 and the basket top 106 at an included angle lies in between 56 degrees and 42 degrees from the basket base of the perforated centrifuge sieve support basket 102.
  • the integral conical shaped perforated circumferential wall 118 is further secured in between the basket base 104 and the basket top 106 of perforated centrifuge sieve support basket 102 to form the perforated centrifuge sieve support basket 102.
  • the integral conical shaped perforated circumferential wall 118 is formed by combining and rolling a plurality of perforated continuous ribs 108.
  • the perforated continuous ribs 108 are formed by fabricating perforations 110 on the surface of the continuous ribs using a laser cutting machine or any other type of engraving, perforating, abrasion, carving, drilling or cutting machine.
  • the continuous ribs on which perforations 110 fabricated thereof are selected from thin metal sheets, plates, panels or alike.
  • the shape of perforations 110 fabricated thereof are alike quadrilateral shaped perforations which are rounded at the corners.
  • the shape of perforations 110 is such as but not limited to rounded quadrilateral, rounded rectangle, rounded square, and oval etc.
  • the perforated centrifuge sieve support basket 102 including perforations 110 are of variable size and uniform shape for providing uninterrupted passages for filtrate, filtering through the filter screen.
  • the width of perforations 110 increases towards the larger diameter of the perforated centrifuge sieve support basket 102.
  • the size and shape of perforations 110 fabricated thereof entirely depends on choice of customers, number and thickness of perforated continuous ribs 108.
  • the perforated continuous ribs 108 are emanated from the basket base of perforated centrifugal sieve support basket 102 at a 45 degrees projected angle to the central axis of the perforated centrifuge sieve support basket 102.
  • the projected angle of perforated continuous ribs 108 preferably lies in between 35 degrees to 55 degrees to the central axis of the perforated centrifuge sieve support basket 102.
  • the perforated circumferential wall 116 is formed by combining at least two perforated continuous ribs 108.
  • the perforated continuous ribs 108 are coupled together in any suitable manner such as but not limited to welding, riveting etc. and in present instance, for example, two perforated continuous ribs 108 are welded together, at one seam forming an interposed side wall 112 and thus forming a perforated circumferential wall 116.
  • the number of the perforated continuous ribs 108 entirely depends on included angle of the perforated centrifuge sieve support basket 102, diameter of basket base 104 and spacing between the perforated continuous ribs 108 for forming perforated passages all around the circumferential wall of the perforated centrifuge sieve support basket 102.
  • the number and thickness of the perforated continuous ribs 108 are selected to such a degree that open area for the flow of feed material within the perforated centrifuge sieve support basket 102 accomplished to its maximum capacities to maximize the productivity of the centrifugals.
  • the number and thickness of the perforated continuous ribs 108 are selected in such a way that strength and stiffness of the perforated centrifuge sieve support basket 102 accomplished to its maximum capacities to increase the efficiency of the centrifugals.
  • the width of perforated continuous ribs 108 generally increases towards the larger diameter of the perforated centrifuge sieve support basket 102.
  • the perforated circumferential wall 116 is rolled in conical shape and welded at other seam forming another interposed side wall 114 as shown in Figure 2 and thus forming an integral conical shaped perforated circumferential wall 118.
  • the included angle at which the integral conical shaped perforated circumferential wall 118 is disposed lies in between 56 degrees and 42 degrees of the perforated centrifuge sieve support basket 102. Further, the integral conical shaped perforated circumferential wall 118 is secured in between the basket base 104 and the basket top 106 to form a perforated centrifuge sieve support basket 102.
  • the integral conical shaped perforated circumferential wall 118 may be secured in any suitable manner such as but not limited to welding, riveting etc. and in present instance, the top and bottom edges of integral conical shaped perforated circumferential wall 118 are welded to the basket base 104 and the basket top 106, at each junction for securely holding the integral conical shaped perforated circumferential wall 118 in a rigid structure and thus forming a rigid, light-weight and stronger perforated centrifuge sieve support basket 102 having uninterrupted perforated passages and a space for attaching a filter screen disposed across the inner edges of the perforated centrifuge sieve support basket 102.
  • the included angle is the angle at which the integral conical shaped perforated circumferential wall 118 is disposed to form the perforated centrifuge sieve support basket 102.
  • the integral conical shaped perforated circumferential wall 118 is disposed at an included angle preferably lies in between 56 degrees and 42 degrees from the basket base 104 of the perforated centrifuge sieve support basket 102.
  • the integral conical shaped perforated circumferential wall 118 may also be disposed at any other alternative angle depending on choice of customers, number and thickness of the perforated continuous ribs 108.
  • the strength and diameter of the basket base 104 is increased to the maximum level thus resulting in high efficiency of centrifugals. It is further contemplated that due to increased strength and diameter of the basket base 104 of the perforated centrifuge sieve support basket 102, it is possible to fabricate base grooves 120 on the basket base 104 for holding filter screen in place within the perforated centrifuge sieve support basket 102.
  • the basket top 106 is further integrated with a clamping ring 122 to provide additional support to the perforated centrifuge sieve support basket 102 as shown in Figure 1.
  • the clamping ring 122 is formed depending on the size of the perforated centrifuge sieve support basket 102.
  • the clamping ring 122 is also used for securing the filter screen on the outer surface portion of the perforated centrifuge sieve support basket 102.
  • a further feature of the perforated centrifuge sieve support basket 102 embodying in the present invention is provision of using the clamping ring 122 for securing the filter screen on the outer surface portion of the perforated centrifuge sieve support basket 102, as a screening medium for the filtrate in the centrifugals.
  • the clamping disc is eradicated from the perforated centrifuge sieve support basket 102 as used in conventional centrifuge support baskets heretofore for holding the filter screen within the perforated centrifuge sieve support basket 102.
  • This mechanism prevents the filter screen from buckling or creasing under pressure of the centrifugals and thus increasing the productivity of the centrifugals or centrifuge machines by maximizing the open area within the perforated centrifuge sieve support basket 102.
  • the filter screen is secured using the clamping ring 122, which is a part of the filter screen on the outer surface portion of the perforated centrifuge sieve support basket 102.
  • This clamping ring 122 increases availability of more filter screen space for filtering purposes thus increases the efficiency of centrifugals.
  • Figure 3 illustrates a schematic representation of side elevation view of perforated centrifuge sieve support basket 102 showing oval shaped perforations 110 along the circumferential wall of the perforated centrifuge sieve support basket 102, and a circumferential wall segment showing oval shaped perforation 110 being exploded and shown in enlarged perspective.
  • the perforated circumferential wall 116 having oval shaped perforations 110 is rolled to form an integral conical shaped perforated circumferential wall 118 having oval shaped perforations 110.
  • the perforated continuous ribs 108 having oval shaped (or any shape) perforations 110 are emanated from the basket base at a projected angle lies in between 35 degrees and 55 degrees to the central axis of the perforated centrifuge sieve support basket 102.
  • the perforated circumferential wall 116, as shown in Figure 1 (a) is formed by combining at least two perforated continuous ribs 108.
  • the perforated continuous ribs 108 are coupled together in any suitable manner to form the perforated circumferential wall 116 having oval shaped (or any shape) perforations 110 which is further rolled to form the integral conical shaped perforated circumferential wall 118 having oval shaped (or any shape) perforations 110 .
  • the integral conical shaped perforated circumferential wall 118 having oval shaped (or any shape) perforations 110 is disposed at an included angle in between 56 degrees and 42 degrees from the basket base 104 of the perforated centrifuge sieve support basket 102.
  • oval shaped perforations 110 entirely depends on number and thickness of the perforated continuous ribs 108 which are coupled together to form the perforated circumferential wall 116 of the perforated centrifuge sieve support basket 102.
  • Figure 4 illustrates a schematic representation of side elevation view of the perforated centrifuge sieve support basket 102 showing rounded quadrilateral shaped perforations 110 along the circumferential wall of the perforated centrifuge sieve support basket 102 and a circumferential wall segment showing rounded quadrilateral shaped perforation 110 being exploded and shown in enlarged perspective.
  • the perforated circumferential wall 116 having rounded quadrilateral shaped perforations 110 is rolled to form an integral conical shaped perforated circumferential wall 118.
  • the perforated continuous ribs 108 having rounded quadrilateral shaped (or any shape) perforations 110 are emanated from the basket base at a projected angle lies in between 35 degrees and 55 degrees to the central axis of the perforated centrifuge sieve support basket 102.
  • the perforated circumferential wall 116, as shown in Figure 1 (a) is formed by combining at least two perforated continuous ribs 108.
  • the perforated continuous ribs 108 are coupled together in any suitable manner to form the perforated circumferential wall 116 having rounded quadrilateral shaped (or any shape) perforations 110 which is further rolled to form the integral conical shaped perforated circumferential wall 118 having rounded quadrilateral shaped (or any shape) perforations 110.
  • the integral conical shaped perforated circumferential wall 118 is having rounded quadrilateral shaped (or any shape) perforations 110 is disposed at an included angle in between 56 degrees and 42 degrees from the basket base 104 of the perforated centrifuge sieve support basket 102.
  • rounded quadrilateral shaped perforations 110 entirely depends on the number and thickness of perforated continuous ribs 108 which are coupled together to form perforated circumferential wall 116 of perforated centrifuge sieve support basket 102.
  • FIGS illustrates a schematic representation of back flush system 502 showing a back flush system 502 consists of a back flush baffle 504 installed outside the perforated centrifuge sieve support basket 102 for clearing the perforated passages of the perforated centrifuge sieve support basket 102 as well as cleaning the coagulated filter screens enclosed within the perforated centrifuge sieve support basket 102 of horizontal centrifugals or centrifuge machines.
  • a further feature embodying in the present invention is provision of installing back flush system 502 consisting back flush baffle 504 for clearing the perforations 110 around the circumferential wall of the perforated centrifuge sieve support basket 102.
  • the back flush baffle 504 is positioned in close proximity of perforated centrifuge sieve support basket 102covering full height of perforated centrifuge sieve support basket 102 for clearing the perforations 110 around the circumferential wall of the perforated centrifuge sieve support basket 102 as well as cleaning coagulated filter screens enclosed within the perforated centrifuge sieve support basket 102.
  • the back flush baffle 504 may be secured in any suitable manner such as but not limited to welding, riveting, and bolting and in present instance the back flush baffle 502 is secured using bolts.
  • the back flush baffle 504 collects filtrate ejected from the perforated centrifuge sieve support basket 102 filtered through the filter screen and generates high turbulence at the outer surface of the perforated centrifuge sieve support basket 102 to such a degree that some liquid reenters the perforations 110 and filter screen slots, thus cleaning coagulated filter screens enclosed within the perforated centrifuge sieve support basket 102 and also clearing the perforations 110 of the perforated centrifuge sieve support basket 102 for the flow of filtrate, filtering out the filter screen.
  • perforations 110 fabricated thereof on the circumferential wall of the perforated centrifuge sieve support basket 102 such as rounded quadrilateral, rounded rectangle, rounded square, oval, etc facilitates the usage of flushing action generated by the back flush baffle 504 for clearing the perforations 110 of the perforated centrifuge sieve support basket 102 as well as cleaning coagulated filter screens enclosed within the perforated centrifuge sieve support basket 102 of horizontal centrifugals or centrifuge machines.
  • the flushing action generated by the back flush baffle 504 also lubricates the movement of fibrous material through the open area of the perforated centrifuge sieve support basket 102 along the axial length of the perforated centrifuge sieve support basket 102.
  • Figure 6 illustrates a schematic representation of horizontal centrifugal sieving assembly 602 used for separating solids from liquids in horizontal centrifugals.
  • a perforated centrifuge sieve support basket 102 is installed in horizontal centrifugal sieving assembly 602 for separating solids from liquids such as but not limited to tapioca, cassava or potato starch separated from slurry.
  • a horizontal centrifugal sieving assembly 602 comprising a sieve housing 604 for enclosing the perforated centrifuge sieve support basket 102, a feed tube 606 for supplying slurry to the perforated centrifuge sieve support basket 102, a drive shaft 608, a fibrous material collection chamber 610 for collecting waste, a starch collection chamber 612 for collecting filtered starch, a door assembly 614 and a back flush baffle 504.
  • a motor-driven perforated centrifuge sieve support basket 102 is mounted on drive shaft 608 and disposed within the sieve housing 604 of the horizontal centrifugal sieving assembly 602.
  • a filter screen is embedded in the perforated centrifuge sieve support basket 102 for screening the granular material or processed materials through the slurry.
  • the filter screen is a screening medium made of material with specific openings or fine spaces allowing only granular material or in present instance starch material to pass through itself. The thickness of openings depends on filtrate to be processed and in present instance the thickness of specific openings of filter screen is in between 40 ⁇ . to 125 ⁇ .
  • a wash cone is mounted within door assembly 614 of horizontal centrifugal sieving assembly 602 to assist filtering of granular material or processed materials through the slurry.
  • the wash cone has 48 to 72 nozzles for spraying water continuously or intermittently for washing front face of the filter screen enclosed within the perforated centrifuge sieve support basket 102.
  • the wash cone is installed in such a way that it covers entire length of the perforated centrifuge sieve support basket 102 and thus covers entire length of the filter screen placed within the perforated centrifuge sieve support basket 102.
  • the starch slurry for example cassava slurry is delivered to the perforated centrifugal sieve support basket 102 axially via feeding tube 606 to the base of the perforated centrifugal sieve support basket 102.
  • perforated centrifugal sieve support basket 102 is cone shaped and spins on its central axis, the centrifugal force generated in the spinning perforated centrifugal sieve support basket 102 with integrated filter screen forces granular material or cassava starch present in starch slurry to move through the fine spaces in filter screen and gets collected in starch collection chamber 612.
  • the cassava starch is filtered through the filter screen, and the residue stayed on the surface of the perforated centrifugal sieve support basket 102 is thrown away.
  • the front face of the perforated centrifugal sieve support basket 102 has certain pressure flushing water sprayed through the wash cone to make cassava residue roll continuously to extract starch out of cassava residue thoroughly.
  • centrifugal forces on fibrous materials or cassava residue present in starch slurry cause them to move along the slope of the perforated centrifugal sieve support basket 102 and ultimately fibrous materials flung out to an open end of the perforated centrifuge sieve support basket 102 and collected in fibrous material collection chamber 610.
  • the perforated centrifuge sieve support basket 102 is perforated enough to provide uninterrupted passage for granular materials or cassava starch to pass through and collected in starch collection chamber 610 of the horizontal centrifugal sieving assembly 602.
  • the back flush baffle 504 is installed in starch collection chamber 612 in close proximity of the perforated centrifuge sieve support basket 102 covering full height of the perforated centrifuge sieve support basket 102 for clearing the perforations 110 around circumferential wall of the perforated centrifuge sieve support basket 102.
  • the back flush baffle 504 is also cleaning coagulated filter screens enclosed within the perforated centrifuge sieve support basket 102.
  • the back flush baffle 504 is installed in the starch collection chamber 612 of the horizontal centrifugal sieving assembly 602.
  • the back flush baffle 504 is secured in any suitable manner such as but not limited to welding, riveting, and bolting and in present instance the back flush baffle 502 is secured using bolts in the starch collection chamber 612.
  • the back flush baffle 504 is positioned in such a way that the angular nature and shape of perforations 110 fabricated thereof on the circumferential wall of the perforated centrifuge sieve support basket 102 facilitates the flushing action generated by the back flush baffle 504.
  • the back flush baffle 504 collects filtrate ejected from perforated centrifuge sieve support basket 102, filtered through filter screen and generates high turbulence at the outside surface of the perforated centrifugal sieve support basket 102 so that some liquid re-enters the filter screen slots, thus cleaning the coagulated filter screens enclosed within the perforated centrifuge sieve support basket 102 and also clearing the perforations 110 of the perforated centrifuge sieve support basket 102 for the flow of cassava starch filtering out the filter screen.
  • FIG. 7 illustrates an exemplary flowchart depicting a method of forming a perforated centrifugal sieve basket, in accordance with the present invention.
  • the perforations 110 are fabricated on the surface of continuous ribs using a laser cutting machine or any other type of other engraving, perforating, abrasion, carving, drilling or cutting machine to form perforated continuous ribs 108;
  • the two perforated continuous ribs 108 are combined together by welding at one seam forming an interposed side wall 112 at each junction and thus forming a perforated circumferential wall 116;
  • the perforated circumferential wall 116 is rolled in to conical shape with its abutting edges welded together at other seam forming another interposed side wall 114 and an integral conical shaped perforated circumferential wall 118 is formed thereby;
  • the integral conical shaped perforated circumferential wall 118 is disposed at an included angle from the base of the basket.
  • the integral conical shaped perforated circumferential wall 118 is secured in between basket base 104 and basket top 106 and by welding top and bottom edges of the integral conical shaped perforated circumferential wall 118 to the respective ends to form perforated centrifugal sieve support basket 102.
  • improved baskets are especially advantageous for use in high speed centrifuging processes such as but limited to for starch extraction and screening, tapioca, cassava processing.
  • the improved baskets can be used in any industry and any place requiring particle separation.
  • Figure 8 illustrates an exemplary flowchart depicting a method of cleaning the perforations 110 of the sieve support basket 102.
  • a back flush baffle 504 is installed in close proximity of the perforated centrifugal sieve basket 102;
  • the back flush baffle collects filtrate filtered out through the perforated centrifugal sieve basket 102;
  • high turbulence is generated on surface of the perforated centrifugal sieve basket 102 to such a degree that liquid ejected with the filtrate and re-enters through the perforations 110 to clean the sieve basket 102.

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  • Centrifugal Separators (AREA)

Abstract

La présente invention concerne un panier de support de tamis centrifuge perforé de forme conique léger présentant une résistance accrue et une rigidité accrue pour des centrifugeuses ou machines centrifuges horizontales. Le panier de support de tamis centrifuge perforé comprend une base de panier, une partie supérieure de panier et une paroi circonférentielle perforée de forme conique intégrée qui est disposée selon un angle inclus compris entre 56 degrés et 42 degrés par rapport à la base de panier. La paroi circonférentielle perforée de forme conique intégrée est en outre fixée entre la partie supérieure de panier et la base de panier pour former un panier de support de tamis centrifuge perforé. La paroi circonférentielle perforée de forme conique intégrée est formée par la combinaison et le laminage d'une pluralité de nervures continues perforées. Les nervures continues perforées sont accouplées entre elles selon une relation de butée jointe à une couture pour former une paroi circonférentielle perforée. Les nervures continues perforées émanent de la base de panier selon un angle projeté compris entre 35 degrés et 55 degrés par rapport à l'axe central du panier de support de tamis centrifuge perforé. La paroi circonférentielle perforée est en outre laminée en forme conique avec ses bords d'extrémité en butée soudés ensemble au niveau d'une autre couture pour former une paroi circonférentielle perforée de forme conique intégrée. Les nervures continues perforées sont formées par la fabrication de perforations de taille et de forme souhaitées sur la surface de nervures continues à l'aide d'une machine de découpe au laser ou de tout autre type d'autres machines de gravure, de perforation, d'abrasion, de sculpture, de perçage ou de découpe. Les perforations formées sont des perforations en forme de quadrilatère semblables qui sont arrondies au niveau des coins et forment ainsi des perforations de forme uniforme telles que, mais sans s'y limiter, des quadrilatères arrondis, un rectangle arrondi, un carré arrondi et un ovale, laissant des bandes continues minces tout autour de la paroi circonférentielle du panier.
PCT/TH2017/000022 2017-03-16 2017-03-16 Panier de support de tamis centrifuge horizontal Ceased WO2018169496A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/TH2017/000022 WO2018169496A1 (fr) 2017-03-16 2017-03-16 Panier de support de tamis centrifuge horizontal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/TH2017/000022 WO2018169496A1 (fr) 2017-03-16 2017-03-16 Panier de support de tamis centrifuge horizontal

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WO2018169496A1 true WO2018169496A1 (fr) 2018-09-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110986493A (zh) * 2019-11-06 2020-04-10 郭志寿 一种卧式振动离心脱水机筛篮

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020148763A1 (en) * 2001-04-16 2002-10-17 Lutz Mark S. Screen cylinder and method
GB2456377A (en) * 2008-12-23 2009-07-15 Broadbent & Sons Ltd Thomas A screen bowl decanting centrifuge
EP2907579A1 (fr) * 2014-02-17 2015-08-19 Siebtechnik GmbH Panier pour essoreuse à panier-tamis
WO2015123735A1 (fr) * 2014-02-24 2015-08-27 Weir Minerals Australia Ltd Ensemble tamis centrifuge
WO2016053690A1 (fr) * 2014-10-02 2016-04-07 Baker Hughes Incorporated Procédé de fabrication d'ensemble crible souterrain

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020148763A1 (en) * 2001-04-16 2002-10-17 Lutz Mark S. Screen cylinder and method
GB2456377A (en) * 2008-12-23 2009-07-15 Broadbent & Sons Ltd Thomas A screen bowl decanting centrifuge
EP2907579A1 (fr) * 2014-02-17 2015-08-19 Siebtechnik GmbH Panier pour essoreuse à panier-tamis
WO2015123735A1 (fr) * 2014-02-24 2015-08-27 Weir Minerals Australia Ltd Ensemble tamis centrifuge
WO2016053690A1 (fr) * 2014-10-02 2016-04-07 Baker Hughes Incorporated Procédé de fabrication d'ensemble crible souterrain

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110986493A (zh) * 2019-11-06 2020-04-10 郭志寿 一种卧式振动离心脱水机筛篮
CN110986493B (zh) * 2019-11-06 2021-10-26 内蒙古西蒙悦达能源有限公司 一种卧式振动离心脱水机筛篮

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