CA2099022A1 - Apparatus for separating solids and liquids - Google Patents
Apparatus for separating solids and liquidsInfo
- Publication number
- CA2099022A1 CA2099022A1 CA002099022A CA2099022A CA2099022A1 CA 2099022 A1 CA2099022 A1 CA 2099022A1 CA 002099022 A CA002099022 A CA 002099022A CA 2099022 A CA2099022 A CA 2099022A CA 2099022 A1 CA2099022 A1 CA 2099022A1
- Authority
- CA
- Canada
- Prior art keywords
- screen
- auger
- filter
- liquid
- solid material
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/28—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed moving during the filtration
- B01D24/32—Rotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0003—Making of sedimentation devices, structural details thereof, e.g. prefabricated parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0018—Separation of suspended solid particles from liquids by sedimentation provided with a pump mounted in or on a settling tank
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0042—Baffles or guide plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0066—Settling tanks provided with contact surfaces, e.g. baffles, particles with a meandering flow pattern of liquid or solid particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/245—Discharge mechanisms for the sediments
- B01D21/2461—Positive-displacement pumps; Screw feeders; Trough conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4631—Counter-current flushing, e.g. by air
- B01D24/4636—Counter-current flushing, e.g. by air with backwash shoes; with nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
- B01D33/25—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow frames axially mounted on a hollow rotary shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
- B01D33/41—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in series connection
- B01D33/42—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in series connection concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/28—Position of the filtering element
- B01D2201/282—Filtering elements with a horizontal rotation or symmetry axis
Abstract
ABSTRACT OF THE DISCLOSURE
Apparatus for separating liquid and solid material has an auger having an auger screw and a tubular housing extending around the auger screw, the tubular housing having an opening in the top thereof to allow the solid material to be deposited through the opening into the auger screw. A screen extends around the auger and is spaced radially outwardly from the tubular housing to allow a mixture of the solid material and the liquid to be introduced between the tubular housing and the screen, whereby the liquid can flow outwardly through the screen while at least a portion of the solid materialis retained on the inner side of the screen. A motor is provided for rotating the screen about the auger to allow the thus-retained solid material to fall through the opening into the auger for removal by the auger, and a filter extends around the screen for filtering the liquid which drains through the screen, the filter and the screen being co-axially rotatable.
Apparatus for separating liquid and solid material has an auger having an auger screw and a tubular housing extending around the auger screw, the tubular housing having an opening in the top thereof to allow the solid material to be deposited through the opening into the auger screw. A screen extends around the auger and is spaced radially outwardly from the tubular housing to allow a mixture of the solid material and the liquid to be introduced between the tubular housing and the screen, whereby the liquid can flow outwardly through the screen while at least a portion of the solid materialis retained on the inner side of the screen. A motor is provided for rotating the screen about the auger to allow the thus-retained solid material to fall through the opening into the auger for removal by the auger, and a filter extends around the screen for filtering the liquid which drains through the screen, the filter and the screen being co-axially rotatable.
Description
2PllUS
~LE
APPARATUS FOR SEPARATING SOLIDS AND LIQUIDS
S
BACKGROUND OF THE~ INVEN~ON ;
Field of the Invention 10 The present invention relates to apparatus for separating solids and liquids and is useful, for example, but not exclusively, for the treatment of waste water, industrial effluents and rn~xtures of liquid and vegetable matter.
Description of Related Art It is known, in the treatment of sewage, to use a cylindrical screen or basket for separating liquids and solids.
The cylindrical screen is formed by a plurality of co-axial circular bars or rings, 20 which are spaced apart in the axial direction of the screen, and which extendaround, and are spaced radially outwardly from an auger, which is co-axial with the screen.
The auger is arranged with its axis upwardly inclined, and with the cylindrical 25 screen at the lower end of the auger, so that a mixture of the solids and liquids can flow into a lower portion of the interior of the screen through a lowerrnostend of the screen. The liquid can then drain outwardly of the screen, between the bars, while the solid material is retained in the interior of the sc~een. This retained solid material is then deposited into the auger, through an opening in 30 the top of the auger, by means of a rake rotating around the interior of the
~LE
APPARATUS FOR SEPARATING SOLIDS AND LIQUIDS
S
BACKGROUND OF THE~ INVEN~ON ;
Field of the Invention 10 The present invention relates to apparatus for separating solids and liquids and is useful, for example, but not exclusively, for the treatment of waste water, industrial effluents and rn~xtures of liquid and vegetable matter.
Description of Related Art It is known, in the treatment of sewage, to use a cylindrical screen or basket for separating liquids and solids.
The cylindrical screen is formed by a plurality of co-axial circular bars or rings, 20 which are spaced apart in the axial direction of the screen, and which extendaround, and are spaced radially outwardly from an auger, which is co-axial with the screen.
The auger is arranged with its axis upwardly inclined, and with the cylindrical 25 screen at the lower end of the auger, so that a mixture of the solids and liquids can flow into a lower portion of the interior of the screen through a lowerrnostend of the screen. The liquid can then drain outwardly of the screen, between the bars, while the solid material is retained in the interior of the sc~een. This retained solid material is then deposited into the auger, through an opening in 30 the top of the auger, by means of a rake rotating around the interior of the
- 2 -cylindrical screen.
Instead of employing th;s arrangement, it has also been proposed to modi~y the shape of the screen so as to form, at the interior of the screen a plurality of ~ `
5 radially inwardly directed recesses or pockets, and to rotate the screen aboutthe axis of the auger, so as to cause the solid material to fall from these recesses into the auger.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a novel and improved apparatus for separating liquids and solids~ which provides an initial screeninging structure and removal of solids by an auger, followed by subsequent filtration in a compact arrangement.
According to the present invention, there is provided apparatus for separating liquid and solid material, comprising an auger having an auger screw and a tubular structure extending around the auger screw, the tubular structure having an opening in the top thereof to allow the solid material to he 20 deposited through the opening into the auger screw. A screen extends around the auger and is spaced radially outwardly ~rom the tubular structure to allow a mixture of the solid material and the liquid to be introduced between the tubular structure and the screen structure, whereby the liquid can flow outwardly through the screen while at least a portion of the solid material is 25 retained on the inner side of the screen structure. A motor is provided for rotating the screen about the auger to allow the thus-retained solid material tofall through the opening into the auger for removal by the auger, and a filter extends around the screen for filtering the liquid which drains through the screen structure.
With the arrangement according to the present invention, the filter has a diamter substantially greater than that of the screen, thus providing a relatively :~ -' :''
Instead of employing th;s arrangement, it has also been proposed to modi~y the shape of the screen so as to form, at the interior of the screen a plurality of ~ `
5 radially inwardly directed recesses or pockets, and to rotate the screen aboutthe axis of the auger, so as to cause the solid material to fall from these recesses into the auger.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a novel and improved apparatus for separating liquids and solids~ which provides an initial screeninging structure and removal of solids by an auger, followed by subsequent filtration in a compact arrangement.
According to the present invention, there is provided apparatus for separating liquid and solid material, comprising an auger having an auger screw and a tubular structure extending around the auger screw, the tubular structure having an opening in the top thereof to allow the solid material to he 20 deposited through the opening into the auger screw. A screen extends around the auger and is spaced radially outwardly ~rom the tubular structure to allow a mixture of the solid material and the liquid to be introduced between the tubular structure and the screen structure, whereby the liquid can flow outwardly through the screen while at least a portion of the solid material is 25 retained on the inner side of the screen structure. A motor is provided for rotating the screen about the auger to allow the thus-retained solid material tofall through the opening into the auger for removal by the auger, and a filter extends around the screen for filtering the liquid which drains through the screen structure.
With the arrangement according to the present invention, the filter has a diamter substantially greater than that of the screen, thus providing a relatively :~ -' :''
- 3 -large filter area in a relatively compact floor space. l~e radial dimension of the filter may be as large as required, while the screen remains relatively thinand can be readuily backwashed to remove solids form the screen.
5 Sprays may be provided, between the screen and the filter structure, and at the exterior of the filter structure, for cleaning the screen and the filter structure, which in the preferred embodiment of the invention are fixed relative to one another and rotatable about the axis of the auger.
BRIEF OESCRIPl'ION OF THE~ DRAWINGS -Further features, advantages and objects of the present in~7ention will be more readily apparent to those skilled in the art from the following description thereof, when taken in conjunction with the accompanying drawings, in which:-Figure 1 shows a diagrammatic view taken in longitudinal cross section, through parts of a waste water treatment apparatus;
Figure 2 shows a broken-away plan view, taken in section along the line 2 - 2 20 of Figure 1, of part of a sedimentation tank in the apparatus of Figure 1;
Figure 3 shows a view in vertical cross-section through a screen and a filter forming parts of the apparatus of Figure 1;
25 Figure 4 shows a portion of the screen of Figure 3 on a enlarged scale;
Figure S shows a view taken in vertical cross-section along the line 5 - 5 o~
Figure 3;
30 Figure 6 shows a view taken in cross-section along the line 6 - 6 of Figure 3;
Figure 7 shows a view in elevation of the screen, taken in the direction of the : ~ :
5 Sprays may be provided, between the screen and the filter structure, and at the exterior of the filter structure, for cleaning the screen and the filter structure, which in the preferred embodiment of the invention are fixed relative to one another and rotatable about the axis of the auger.
BRIEF OESCRIPl'ION OF THE~ DRAWINGS -Further features, advantages and objects of the present in~7ention will be more readily apparent to those skilled in the art from the following description thereof, when taken in conjunction with the accompanying drawings, in which:-Figure 1 shows a diagrammatic view taken in longitudinal cross section, through parts of a waste water treatment apparatus;
Figure 2 shows a broken-away plan view, taken in section along the line 2 - 2 20 of Figure 1, of part of a sedimentation tank in the apparatus of Figure 1;
Figure 3 shows a view in vertical cross-section through a screen and a filter forming parts of the apparatus of Figure 1;
25 Figure 4 shows a portion of the screen of Figure 3 on a enlarged scale;
Figure S shows a view taken in vertical cross-section along the line 5 - 5 o~
Figure 3;
30 Figure 6 shows a view taken in cross-section along the line 6 - 6 of Figure 3;
Figure 7 shows a view in elevation of the screen, taken in the direction of the : ~ :
- 4 -arrow A of Figure 3;
Figure 8 shows a view in side elevation of a part of one the pockets of a screen forming part of the of Figure 3;
S ::
Figure 9 shows a view in the axial direction of the screen, of the pocket part shown in Figure 8;
Figure 10 shows a view in a radially inwardly direction of the pocket part of Figure 8; -:
Figure 11 shows a view on an enlarged scale of part of Figure 9; and Figure 12 shows a broken-away view taken in section along the line 12 - 12 of 15 Figure 9.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In Figure 1 of ~he accompanying drawings, reference numeral 10 indicates 20 generally an apparatus for separating liquids and solids, which includes a settlement tank indicated generally by reference numeral 12. The settlement tank 12 is provided with vertical baffles 14, which extend transversely OI the settlement tank 12 and which are staggered from one another in both the vertical and the horizontal directions so as to provide a vertically and 25 horizontally serpentine path of flow through the settlement tank, as indicated by arrows in Figures 1 and 2.
An inlet pipe 16 provicled with a valve 18 supplies a mixture of liquids and solids into the interior of the settlement tank 12 at one end of the settlement ::
30 tank 12, and this mixture then flows along the above-described serpentine path to the opposite end of the settlement tank 12.
9 ~ ~ 2 ~
The baffles 14 are provided, along the bottom edges thereof, with pipes 18 having horizontally directed outlet openings for discharging air into the mixture ~ -for aerating and agitating the mixture. The pipes 18 are provided with a ~ ;
supply of compressed air by a compressor 20, which is driven by an electric S motor 22 and provided with a compressed air tank 24, which is connected to the pipes 18 through pipes 25. The compressed air tank 24 may be replaced by a ventilator blower.
The air flows into the compressor 20 through a first, lower air inlet duct 26, lû having a first air inlet end 28 in the settlement tank 12 above the level of the mixture of solids and liquids of the settlement tank 12, and through a second, upper air inlet end 30, which is open to the atmosphere.
The apparatus 10 includes, at the right-hand end of the settlement tank, as 15 viewed in Figure 1, a rotatable screen and filter structure indicated generally by reference numeral 32, which has a horizontal axis of rotation extending in the longitudinal direction of the settlement tank 12 and comprises an inner rotor indicated generally by reference numeral 33, and an outer ro~or indicated generally by reference numeral 34, which is co-axial with the inner rotor 33.
The inner rotor 33 extends around and is coaxial with an auger screw 38, which has a shaft 40 and a tube 42 extending around the auger screw 38 and forming a tubular housing for the auger screw 38.
The inner rotor 33 is supported on the auger tube 42 by means of bearings 44 (Figure 3), which allow the inner rotor 33 to rotate about the auger tube 42.
An internally-toothed ring gear 46 secured to one side o~ the inner rotor 33 meshes with a pinion 48 on the output shaft of a reduction gearing 49 driven by an electric motor 50, so that upon energization of the motor 50 the ring gear 46 is driven by the pinion 48 to cause the rotation of the inner rotor 33 about the auger tube 42.
The outer rotor 34 is supported at its right-hand side, as viewed in Figure 1, by means of a bearing 52 on the auger tube 42 and, at its opposite side, on a pair of support rollers 54 (Figure 5) in rolling engagement with the inner periphery of an annular end wall 56. l`he support rollers 54 are rotatably mounted on a S triangular support 55, which is mounted on a pedestal block 56 at one end of the auger tube 42. The pedestal block 56 is in turn supported in a horizontal I-beam 58 (Figure 1) extending across the width of the settlement tank 12.
An electric motor 60 ~Figure 3), through a reduction gearing 62, drives a pinion 64 meshing with a ring gear 66. The ring gear 66 is mounted on a circular side wall 68 at the right-hand side of the outer rotor 34, the bearing 52 being attached to the side wall 68. By energization of the electric mo~or 6û, the outer rotor 34 is rotated about the auger tube 42.
As shown in Figure 6, the inner rotor 32 comprises a screen 70, which in the present embodiment of the invention is made of metal mesh but which may alternatively be made of cotton, polyvinylchloride or another material. The screen 70 is shaped to form radially outwardly extending, radially inwardly open filter chambers or ~pockets~ 72, which are equiangularly spaced around 20 the auger tube 42 and which are spaced from one another by radially outwardly open spaces 74. In the present embodiment, eight of the pockets 72 ;~
are provided, but it is alternatively possible to employ a greater number of pockets. The screen 70 is supported on rods 76, opposite ends of which are secured to a first circular side wall 78 carrying the ring gear 46 at one side of `
25 the inner rotor 32, and to a second circular side wall 80 at the opposite side of the inner rotor 32. The side wall 78 closes off the spaces 74 between the pockets 72 from the tank 12 and is formed with eight openings 79 (Figure 5) ;through which the liquid and solids in the tank 12 can flow into the screen pockets 72 of the inner rotor 33, as described in greater detail below.
F`igure 6 also shows four spray pipes 84 located between the inner and outer rotors 32 and 33 and provided with spray nozzles 86, which are directed so as to spray radially inwardly onto the mesh 70 and into the radially outwardly ;;
open spaces 74.
Between the spray pipes 84 and the outer auger 33 there is provided a S cylindrically arch-shaped baffle or cover 83 which extends over the top of theinner rotor 32 and which is provided, at opposite sides of the cover 82, with inclined gutters 85.
A weir structure 86 (Figure 3) in the settlement tank 12 has, at a semi- :
10 circularly curved upper edge 85 of the weir structure 86, a semi-circular seal 87, which is in. sliding, sealing contact with a side face of the ring gear 46 around the lowermost half of the ring gear 46. The weir 86 and the seal 87 ensure that the mixture of solids and liquids flowing through the settlement ~;
tank 12, in the direction of the arrows of Figure 1, flows firstly through the openings 79 in the side wall 78 and into the pockets 72 of the inner rotor 32 and then passes through the screen 70 before passing radially outwardly through the outer rotor, as described below.
~.-Solid material which is retained within the pockets 72 of the inner rotor 32 at ~ i 20 the lower half of the inner rotor 32 is carried upwardly on the screen 70, as theinner rotor is rotated by the electric motor 50, until it is dislodged by water directed radially inwardly from the spray nozzles 86. The rotation of the upper rotor 33 and the spraying from the spray nozzles 86 are effected intermittently, : -at time inten7als which are selected in accordance with the rate of deposition ~ ~ :
25 of the solid material on the screen mesh 70 in the pockets 72.
Within the filter 32, the auger tube 42 has an upwardly directed opening 44, through which the solid material which is dislodged by the sprays from the spray nozzles 86 ancl by gravity ~rom the pockets 72 is deposited into the auger30 38.
The shaft 40 of the auger 38 is rotated by an electric motor 90 through a ~ ~ it~
reduction gearing 92. The rotation of the auger screw shaft 40 causes the solid material deposited into the auger 38 to be fed along the auger tube 42 for discharge through an outlet pipe 94 into a container ~not shown) or the like.
Figure 8 shows a view in side elevation of a part of one the pockets of a screen forming part of the of Figure 3;
S ::
Figure 9 shows a view in the axial direction of the screen, of the pocket part shown in Figure 8;
Figure 10 shows a view in a radially inwardly direction of the pocket part of Figure 8; -:
Figure 11 shows a view on an enlarged scale of part of Figure 9; and Figure 12 shows a broken-away view taken in section along the line 12 - 12 of 15 Figure 9.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
In Figure 1 of ~he accompanying drawings, reference numeral 10 indicates 20 generally an apparatus for separating liquids and solids, which includes a settlement tank indicated generally by reference numeral 12. The settlement tank 12 is provided with vertical baffles 14, which extend transversely OI the settlement tank 12 and which are staggered from one another in both the vertical and the horizontal directions so as to provide a vertically and 25 horizontally serpentine path of flow through the settlement tank, as indicated by arrows in Figures 1 and 2.
An inlet pipe 16 provicled with a valve 18 supplies a mixture of liquids and solids into the interior of the settlement tank 12 at one end of the settlement ::
30 tank 12, and this mixture then flows along the above-described serpentine path to the opposite end of the settlement tank 12.
9 ~ ~ 2 ~
The baffles 14 are provided, along the bottom edges thereof, with pipes 18 having horizontally directed outlet openings for discharging air into the mixture ~ -for aerating and agitating the mixture. The pipes 18 are provided with a ~ ;
supply of compressed air by a compressor 20, which is driven by an electric S motor 22 and provided with a compressed air tank 24, which is connected to the pipes 18 through pipes 25. The compressed air tank 24 may be replaced by a ventilator blower.
The air flows into the compressor 20 through a first, lower air inlet duct 26, lû having a first air inlet end 28 in the settlement tank 12 above the level of the mixture of solids and liquids of the settlement tank 12, and through a second, upper air inlet end 30, which is open to the atmosphere.
The apparatus 10 includes, at the right-hand end of the settlement tank, as 15 viewed in Figure 1, a rotatable screen and filter structure indicated generally by reference numeral 32, which has a horizontal axis of rotation extending in the longitudinal direction of the settlement tank 12 and comprises an inner rotor indicated generally by reference numeral 33, and an outer ro~or indicated generally by reference numeral 34, which is co-axial with the inner rotor 33.
The inner rotor 33 extends around and is coaxial with an auger screw 38, which has a shaft 40 and a tube 42 extending around the auger screw 38 and forming a tubular housing for the auger screw 38.
The inner rotor 33 is supported on the auger tube 42 by means of bearings 44 (Figure 3), which allow the inner rotor 33 to rotate about the auger tube 42.
An internally-toothed ring gear 46 secured to one side o~ the inner rotor 33 meshes with a pinion 48 on the output shaft of a reduction gearing 49 driven by an electric motor 50, so that upon energization of the motor 50 the ring gear 46 is driven by the pinion 48 to cause the rotation of the inner rotor 33 about the auger tube 42.
The outer rotor 34 is supported at its right-hand side, as viewed in Figure 1, by means of a bearing 52 on the auger tube 42 and, at its opposite side, on a pair of support rollers 54 (Figure 5) in rolling engagement with the inner periphery of an annular end wall 56. l`he support rollers 54 are rotatably mounted on a S triangular support 55, which is mounted on a pedestal block 56 at one end of the auger tube 42. The pedestal block 56 is in turn supported in a horizontal I-beam 58 (Figure 1) extending across the width of the settlement tank 12.
An electric motor 60 ~Figure 3), through a reduction gearing 62, drives a pinion 64 meshing with a ring gear 66. The ring gear 66 is mounted on a circular side wall 68 at the right-hand side of the outer rotor 34, the bearing 52 being attached to the side wall 68. By energization of the electric mo~or 6û, the outer rotor 34 is rotated about the auger tube 42.
As shown in Figure 6, the inner rotor 32 comprises a screen 70, which in the present embodiment of the invention is made of metal mesh but which may alternatively be made of cotton, polyvinylchloride or another material. The screen 70 is shaped to form radially outwardly extending, radially inwardly open filter chambers or ~pockets~ 72, which are equiangularly spaced around 20 the auger tube 42 and which are spaced from one another by radially outwardly open spaces 74. In the present embodiment, eight of the pockets 72 ;~
are provided, but it is alternatively possible to employ a greater number of pockets. The screen 70 is supported on rods 76, opposite ends of which are secured to a first circular side wall 78 carrying the ring gear 46 at one side of `
25 the inner rotor 32, and to a second circular side wall 80 at the opposite side of the inner rotor 32. The side wall 78 closes off the spaces 74 between the pockets 72 from the tank 12 and is formed with eight openings 79 (Figure 5) ;through which the liquid and solids in the tank 12 can flow into the screen pockets 72 of the inner rotor 33, as described in greater detail below.
F`igure 6 also shows four spray pipes 84 located between the inner and outer rotors 32 and 33 and provided with spray nozzles 86, which are directed so as to spray radially inwardly onto the mesh 70 and into the radially outwardly ;;
open spaces 74.
Between the spray pipes 84 and the outer auger 33 there is provided a S cylindrically arch-shaped baffle or cover 83 which extends over the top of theinner rotor 32 and which is provided, at opposite sides of the cover 82, with inclined gutters 85.
A weir structure 86 (Figure 3) in the settlement tank 12 has, at a semi- :
10 circularly curved upper edge 85 of the weir structure 86, a semi-circular seal 87, which is in. sliding, sealing contact with a side face of the ring gear 46 around the lowermost half of the ring gear 46. The weir 86 and the seal 87 ensure that the mixture of solids and liquids flowing through the settlement ~;
tank 12, in the direction of the arrows of Figure 1, flows firstly through the openings 79 in the side wall 78 and into the pockets 72 of the inner rotor 32 and then passes through the screen 70 before passing radially outwardly through the outer rotor, as described below.
~.-Solid material which is retained within the pockets 72 of the inner rotor 32 at ~ i 20 the lower half of the inner rotor 32 is carried upwardly on the screen 70, as theinner rotor is rotated by the electric motor 50, until it is dislodged by water directed radially inwardly from the spray nozzles 86. The rotation of the upper rotor 33 and the spraying from the spray nozzles 86 are effected intermittently, : -at time inten7als which are selected in accordance with the rate of deposition ~ ~ :
25 of the solid material on the screen mesh 70 in the pockets 72.
Within the filter 32, the auger tube 42 has an upwardly directed opening 44, through which the solid material which is dislodged by the sprays from the spray nozzles 86 ancl by gravity ~rom the pockets 72 is deposited into the auger30 38.
The shaft 40 of the auger 38 is rotated by an electric motor 90 through a ~ ~ it~
reduction gearing 92. The rotation of the auger screw shaft 40 causes the solid material deposited into the auger 38 to be fed along the auger tube 42 for discharge through an outlet pipe 94 into a container ~not shown) or the like.
5 The construction of the pockets 72 of the inner rotor 32 is illustrated in greater detail in Figs. 8 through 12.
Each of the pockets is formed by a pair of generally L-shaped mesh structures, one of which is indicated generally by reference numeral 120, and is formed of metal mesh material 122, the edges of which are held in a frame 124. The mesh material læ is supported, between opposite sides of the frame 124, by support wires 126, the ends of which are secured in the frame 124. At each of the pockets 72, the outer edges of the mesh structures 120 are connected together by connectors 128, and opposite sides of the frames 124 are slid into engagement with slots in connector strips 130. The inner ends of the frames are slid into contact with channel-shaped spacers 132, which are mounted on rods 134 extending between the opposite wall 78 and 80 of the inner rotor 33.
The outer rotor 34 forms a filter structure and has three annular walls 140 extending transversely of the axis of rotation of the outer rotor 34. The wall 140 are secured to one another and to the opposite side walls 56 and 68 of the outer rotor 34 by means of rods 141 (Figure 5). The outer rotor is packed with sand 146, which serves as a filter medium. Other filter media, e.g. ceramic filter material or activated charcoal or a combination of different filter media, may be substituted for the sand 146. Inner and outer heavy wire meshes 142a, sandwiched with fine sand retention meshes 142b and inner micromeshes 142c, serve to retain the sand radially. To prevent the sand from being displaced around the outer rotor 34 as the latter rotates, radially extending bulkheads 145 (Figure 6) are equiangularly spaced around the outer rotor 34.
3û
The liquid which passes radially outwardly through the screen 70 of the inner rotor 33 then passes through the sand 146 of the outer rotor 34 and is retained ~ ~,3 ~
in an end portion 148 of the tank 12, which is provided with an overflow pipe 150, through which the filtered liquid can flow -from the tarlk end portion 148.
The weir structure 86 is provided with a semi-circular seal 152, in sliding, sealing contact with the side wall 56 of the outer rotor 34. The seal 152 ensures that the liquid which has passed through the screen 70 of the inner rotor is retained in the outer rotor 34 until it flows through the sand 146.
A water pipe 153 with spray nozzles 155 is provided above the outer rotor 34 for back-washing the sand 146.
The compressor 20, the motor 22 and teh tank 24, the inner and outer rotors 33 and 34, the auger 38, and the end portion 148 of the tank 12 are all accommodated within an air-tight enclosure, indicated generally by reference numeral 160, which includes an end wall 162 and a roof 164.
The settlement tank 12 is provided with a flexible cover 166, which can close off the top of the settlement tank 10 from the atmosphere.
20 Consequently, noxious fumes from the liquid and solids being processed can beretained within the interior of the settlement tank 10 and the enclosure 111, soas to avoid pollution of the surrounding atmosphere.
As will be apparent to those skilled in the art, various modifications may be 25 made to the above-described apparatus within the scope of the invention as defined by the appended claims.
Each of the pockets is formed by a pair of generally L-shaped mesh structures, one of which is indicated generally by reference numeral 120, and is formed of metal mesh material 122, the edges of which are held in a frame 124. The mesh material læ is supported, between opposite sides of the frame 124, by support wires 126, the ends of which are secured in the frame 124. At each of the pockets 72, the outer edges of the mesh structures 120 are connected together by connectors 128, and opposite sides of the frames 124 are slid into engagement with slots in connector strips 130. The inner ends of the frames are slid into contact with channel-shaped spacers 132, which are mounted on rods 134 extending between the opposite wall 78 and 80 of the inner rotor 33.
The outer rotor 34 forms a filter structure and has three annular walls 140 extending transversely of the axis of rotation of the outer rotor 34. The wall 140 are secured to one another and to the opposite side walls 56 and 68 of the outer rotor 34 by means of rods 141 (Figure 5). The outer rotor is packed with sand 146, which serves as a filter medium. Other filter media, e.g. ceramic filter material or activated charcoal or a combination of different filter media, may be substituted for the sand 146. Inner and outer heavy wire meshes 142a, sandwiched with fine sand retention meshes 142b and inner micromeshes 142c, serve to retain the sand radially. To prevent the sand from being displaced around the outer rotor 34 as the latter rotates, radially extending bulkheads 145 (Figure 6) are equiangularly spaced around the outer rotor 34.
3û
The liquid which passes radially outwardly through the screen 70 of the inner rotor 33 then passes through the sand 146 of the outer rotor 34 and is retained ~ ~,3 ~
in an end portion 148 of the tank 12, which is provided with an overflow pipe 150, through which the filtered liquid can flow -from the tarlk end portion 148.
The weir structure 86 is provided with a semi-circular seal 152, in sliding, sealing contact with the side wall 56 of the outer rotor 34. The seal 152 ensures that the liquid which has passed through the screen 70 of the inner rotor is retained in the outer rotor 34 until it flows through the sand 146.
A water pipe 153 with spray nozzles 155 is provided above the outer rotor 34 for back-washing the sand 146.
The compressor 20, the motor 22 and teh tank 24, the inner and outer rotors 33 and 34, the auger 38, and the end portion 148 of the tank 12 are all accommodated within an air-tight enclosure, indicated generally by reference numeral 160, which includes an end wall 162 and a roof 164.
The settlement tank 12 is provided with a flexible cover 166, which can close off the top of the settlement tank 10 from the atmosphere.
20 Consequently, noxious fumes from the liquid and solids being processed can beretained within the interior of the settlement tank 10 and the enclosure 111, soas to avoid pollution of the surrounding atmosphere.
As will be apparent to those skilled in the art, various modifications may be 25 made to the above-described apparatus within the scope of the invention as defined by the appended claims.
Claims (8)
1. Apparatus for separating liquid and solid material, comprising:
an auger;
said auger comprising an auger screw and a tubular housing extending around said auger screw;
said tubular housing having an opening in the top thereof to allow the solid material to be deposited through the opening into said auger screw;
a screen extending around said auger and spaced radially outwardly from said tubular housing to allow a mixture of the solid material and the liquid to be introduced between said tubular housing and said screen, whereby the liquid can flow outwardly through said screen while at least a portion of said solid material is retained on the inner side of said screen;
means supporting said screen for rotation about said auger;
means for rotating said screen about said auger to allow the thus-retained solid material to be deposited through said opening into said auger for removal by said auger screw;
a filter extending around said screen for filtering the liquid which drains through said screen;
means for supporting said filter for rotation about said screen; and means for rotating said filter around said screen.
an auger;
said auger comprising an auger screw and a tubular housing extending around said auger screw;
said tubular housing having an opening in the top thereof to allow the solid material to be deposited through the opening into said auger screw;
a screen extending around said auger and spaced radially outwardly from said tubular housing to allow a mixture of the solid material and the liquid to be introduced between said tubular housing and said screen, whereby the liquid can flow outwardly through said screen while at least a portion of said solid material is retained on the inner side of said screen;
means supporting said screen for rotation about said auger;
means for rotating said screen about said auger to allow the thus-retained solid material to be deposited through said opening into said auger for removal by said auger screw;
a filter extending around said screen for filtering the liquid which drains through said screen;
means for supporting said filter for rotation about said screen; and means for rotating said filter around said screen.
2. Apparatus as claimed in claim 1, further comprising spray nozzles between said screen and said filter and directed towards the outer surface of said screen, around an upper portion of said screen, for clearing said screen.
3. Apparatus as claimed in claim 1, further comprising spray nozzles directed towards the outer surface of said filter, around an upper portion of said filter, for cleaning said filter.
4. Apparatus as claimed in claim 3, further comprising a cylindrically curved baffle between said screen and an upper portion of said filter for deflecting away from said screen liquid from said screen liquid from said spray nozzles which seeps radially inwardly through said filter.
5. Apparatus as claimed in claim 1, wherein said screen comprises a screen shaped to form a plurality of radially outwardly extending screen recesses which are spaced around said auger, said screen recesses being open radially inwardly towards said auger, said recesses also being open at one side of said screen for receiving an inflow of liquid and solids into said recesses.
6. Apparatus as claimed in claim 1, further comprising a tank for receiving a mixture of solids and liquid, said tank having an arrangement of vertical baffles for deflecting the flow of said mixture along said tank and air outlets for aerating the mixture in said tank, and an outlet for the flow of the mixtureinto said screen.
7. Apparatus as claimed in claim 6, wherein said outlet is formed by a vertically circularly curved weir extending across said tank and a seal between said weir and one side of said screen.
8. Apparatus as claimed in claim 1, wherein said filter comprises an annular filter formed of particulate material for filtering the liquid from saidscreen and inner and outer mesh structures for retaining said particulate material.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002099022A CA2099022A1 (en) | 1993-06-23 | 1993-06-23 | Apparatus for separating solids and liquids |
| EP94918707A EP0705133A1 (en) | 1993-06-23 | 1994-06-22 | Apparatus for separating solids and liquids |
| AU69925/94A AU6992594A (en) | 1993-06-23 | 1994-06-22 | Apparatus for separating solids and liquids |
| PCT/CA1994/000327 WO1995001216A1 (en) | 1993-06-23 | 1994-06-22 | Apparatus for separating solids and liquids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002099022A CA2099022A1 (en) | 1993-06-23 | 1993-06-23 | Apparatus for separating solids and liquids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2099022A1 true CA2099022A1 (en) | 1994-12-24 |
Family
ID=4151827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002099022A Abandoned CA2099022A1 (en) | 1993-06-23 | 1993-06-23 | Apparatus for separating solids and liquids |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0705133A1 (en) |
| AU (1) | AU6992594A (en) |
| CA (1) | CA2099022A1 (en) |
| WO (1) | WO1995001216A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE504046C2 (en) * | 1995-03-27 | 1996-10-28 | Roto Sieve Ab | dewatering |
| CN111729354B (en) * | 2020-05-30 | 2021-11-23 | 乐清市荣禹污水处理有限公司 | Sedimentation tank |
| CN111790203B (en) * | 2020-07-22 | 2021-10-15 | 李振涛 | Based on carousel filter for sewage treatment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1630274A (en) * | 1923-04-20 | 1927-05-31 | Ray A North | Water filter |
| US2748951A (en) * | 1951-05-04 | 1956-06-05 | Dubach Max | Device for separating solid particles from liquids |
| BE516072A (en) * | 1952-04-08 | |||
| FR1116888A (en) * | 1954-12-15 | 1956-05-14 | Chabal & Cie C | Filtering station with variable flow, in control from the downstream side, with device for damping variations in flow |
| US5110461A (en) * | 1990-09-05 | 1992-05-05 | Abel Guenther | Apparatus for separating liquids and solids |
| US5133860A (en) * | 1991-12-31 | 1992-07-28 | Tai Liang C | Solid and liquid separator with a liquid filter |
-
1993
- 1993-06-23 CA CA002099022A patent/CA2099022A1/en not_active Abandoned
-
1994
- 1994-06-22 AU AU69925/94A patent/AU6992594A/en not_active Abandoned
- 1994-06-22 WO PCT/CA1994/000327 patent/WO1995001216A1/en not_active Application Discontinuation
- 1994-06-22 EP EP94918707A patent/EP0705133A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| AU6992594A (en) | 1995-01-24 |
| WO1995001216A1 (en) | 1995-01-12 |
| EP0705133A1 (en) | 1996-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5788848A (en) | Apparatus and methods for separating solids from flowing liquids or gases | |
| CA1083974A (en) | Microscreen drum | |
| US20060021921A1 (en) | Apparatus for removing fine material from a liquid | |
| EA008724B1 (en) | Drum filter assembly | |
| IL265691A (en) | Frame-type disc filter with bypass water control for preventing bypass water from being used in backwashing | |
| SI9300268A (en) | Lamellar apparatus and method for clarifying water | |
| EP0111509A1 (en) | Apparatus for universal water treatment | |
| KR101867483B1 (en) | Rainwater purify apparatus using rotating type trommel | |
| CA2099022A1 (en) | Apparatus for separating solids and liquids | |
| AU7808194A (en) | System and method of processing mixture of solids and liquids | |
| KR102644074B1 (en) | Drum screen device for submerged membrane separation system equipped with a conical mesh for easy sludge discharge | |
| SE433073B (en) | DEVICE FOR CLEANING OF LIQUID MEDIA, LIKE THE WASTE WATER | |
| SU1567117A3 (en) | Thickner | |
| CA2460409C (en) | Filtering apparatus | |
| KR200317510Y1 (en) | Sludge separating and removing apparatus | |
| WO2011148029A1 (en) | Unit for the advanced pretreatment of wastewater | |
| US20240009599A1 (en) | Concentric Dual Drum Screen | |
| JP2005254109A (en) | Filtering apparatus for waste water | |
| US3669269A (en) | Industrial plant for recovering solids from liquids | |
| CN216073428U (en) | Multistage waste water filter | |
| US3837148A (en) | Apparatus for filtering flue gas | |
| CN114100247B (en) | Waste emulsion treatment device | |
| CN214061875U (en) | Sewer pipe with cleaning device | |
| RU2062633C1 (en) | Horizontal drum filter for cleaning gas (liquid) | |
| JP2004314014A (en) | Dust collecting apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |