CA2262887C - Centrifugal filtration apparatus - Google Patents
Centrifugal filtration apparatus Download PDFInfo
- Publication number
- CA2262887C CA2262887C CA2262887A CA2262887A CA2262887C CA 2262887 C CA2262887 C CA 2262887C CA 2262887 A CA2262887 A CA 2262887A CA 2262887 A CA2262887 A CA 2262887A CA 2262887 C CA2262887 C CA 2262887C
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- CA
- Canada
- Prior art keywords
- barrel
- filtration apparatus
- centrifugal filtration
- filter
- containment chamber
- 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.)
- Expired - Fee Related
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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
- B04B7/02—Casings; Lids
-
- 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
- B01D33/80—Accessories
- B01D33/803—Accessories in which the filtering elements are moved between filtering operations ; Particular measures for removing or replacing the filtering elements; Transport systems for filters
Abstract
A centrifugal filtration apparatus includes a containment chamber having a top closure. A perforated barrel is mounted for high speed rotation within the containment chamber. A filter is mounted to sidewalls within an interior cavity of the barrel. The top closure of the containment chamber can be raised to provide access to the barrel for the purpose of changing the filter.
Description
TITLE OF THE INVENTION:
centrifugal filtration apparatus NAMES) OF INVENTOR(S):
Gerhard Schmidt FIELD OF THE INVENTION
The present invention relates to a centrifugal filtration apparatus BACKGROUND OF THE INVENTION
Published Canadian Patent Application 2,034,918 discloses a centrifugal filtration apparatus. The apparatus has a drum with a plurality of perforations . Removably mounted on the inside of the drum is a filter. In order to effect filtration, the drum is rotated at high speed. A liquid mixture is pumped through spray inlets into the drum. The liquids are forced outwardly by centrifugal force. Light liquids pass through the filter and through the perforations to the exterior of the drum. Heavier liquids and solids are unable to pass through the filter and, therefore, migrate along the filter until they reach an outlet.
The centrifugal filtration apparatus, as described above, will not operate properly if the filter becomes clogged. The light liquids, unable to penetrate the filter will migrate along the filter with the heavier liquids and solids until they reach the outlet. It is, therefore, essential that the filter be frequently inspected and, when required, changed. The changing of the filter on a centrifugal filtration apparatus is currently taking approximately eight hours.
SUMMARY OF THE INVENTION
What is required is an centrifugal filtration apparatus for which the filter may be more rapidly changed.
According to the present invention there is provided a centrifugal filtration apparatus which includes a containment chamber having a top closure. A perforated barrel is mounted for high speed rotation within the containment chamber. The barrel has sidewalls defining an interior cavity. Means are provided for mounting a filter to the sidewalk within the interior cavity of the barrel. Means are provided for accessing the interior cavity of the barrel for the purpose of changing the filter. At least one inlet is provided for passage of liquids into the barrel. A first outlet is provided for passage of liquids that cannot pass through the filter and separated solids from the barrel. A second outlet is provided for passage of liquids that have passed through the perforated barrel from the containment chamber. Means is provided for raising the top closure of the containment chamber, thereby providing access to the barrel for the purpose of changing the filter.
With the centrifugal filtration apparatus, as described above, the top closure of the containment chamber can be raised to provide access to the barrel for the purpose of changing the filter. This dramatically reduces the time necessary to change the filter. A changeover that previously took eight hours is now taking less than one hour.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, access to the filter is further improved when the barrel has a top portion and a bottom portion that are detachably secured together. This enables the barrel to be taken apart to provide access to the filter.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, even more beneficial results may be obtained when the containment chamber has an access door. This enables better access to the barrel for the purpose of detaching the top portion of the barrel from the bottom portion.
centrifugal filtration apparatus NAMES) OF INVENTOR(S):
Gerhard Schmidt FIELD OF THE INVENTION
The present invention relates to a centrifugal filtration apparatus BACKGROUND OF THE INVENTION
Published Canadian Patent Application 2,034,918 discloses a centrifugal filtration apparatus. The apparatus has a drum with a plurality of perforations . Removably mounted on the inside of the drum is a filter. In order to effect filtration, the drum is rotated at high speed. A liquid mixture is pumped through spray inlets into the drum. The liquids are forced outwardly by centrifugal force. Light liquids pass through the filter and through the perforations to the exterior of the drum. Heavier liquids and solids are unable to pass through the filter and, therefore, migrate along the filter until they reach an outlet.
The centrifugal filtration apparatus, as described above, will not operate properly if the filter becomes clogged. The light liquids, unable to penetrate the filter will migrate along the filter with the heavier liquids and solids until they reach the outlet. It is, therefore, essential that the filter be frequently inspected and, when required, changed. The changing of the filter on a centrifugal filtration apparatus is currently taking approximately eight hours.
SUMMARY OF THE INVENTION
What is required is an centrifugal filtration apparatus for which the filter may be more rapidly changed.
According to the present invention there is provided a centrifugal filtration apparatus which includes a containment chamber having a top closure. A perforated barrel is mounted for high speed rotation within the containment chamber. The barrel has sidewalls defining an interior cavity. Means are provided for mounting a filter to the sidewalk within the interior cavity of the barrel. Means are provided for accessing the interior cavity of the barrel for the purpose of changing the filter. At least one inlet is provided for passage of liquids into the barrel. A first outlet is provided for passage of liquids that cannot pass through the filter and separated solids from the barrel. A second outlet is provided for passage of liquids that have passed through the perforated barrel from the containment chamber. Means is provided for raising the top closure of the containment chamber, thereby providing access to the barrel for the purpose of changing the filter.
With the centrifugal filtration apparatus, as described above, the top closure of the containment chamber can be raised to provide access to the barrel for the purpose of changing the filter. This dramatically reduces the time necessary to change the filter. A changeover that previously took eight hours is now taking less than one hour.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, access to the filter is further improved when the barrel has a top portion and a bottom portion that are detachably secured together. This enables the barrel to be taken apart to provide access to the filter.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, even more beneficial results may be obtained when the containment chamber has an access door. This enables better access to the barrel for the purpose of detaching the top portion of the barrel from the bottom portion.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, even more beneficial results may be obtained when the top portion of the barrel is rotatably mounted to the top closure and the bottom portion is rotatably mounted to a bottom of the containment chamber. A first half of a filter is placed in the top portion. A second half of the filter is placed in the bottom portion. When the top closure is lifted, the top portion of the barrel is raised thereby providing ready access to the filter.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, even a slight weight imbalance can adversely affect the high speed rotation of the barrel. It is, therefore, preferred that the top portion and the bottom portion are substantially symmetrical. It is also preferred that at least one circumferential liquid filled balancing tube is secured around an exterior surface of the barrel.
There are various ways of detachably fastening the top portion and the bottom portion of the barrel. One way is to provide both the top portion and the bottom portion with attachment flanges. These attachment flanges can be secured together with fasteners, such as bolts.
There are various ways of lifting top closure. One way is to provide telescopically extendible actuators, such as hydraulic cylinders.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, even more beneficial results may be obtained when the movement of the actuators is guided by guides that guide the movement of the top closure.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, the surface of the filter must be kept clear of solids build up if it is to function as intended. Even more beneficial results may, therefore, be obtained when scraper blades are disposed within the interior cavity of the barrel.
The scraper blades are spaced closely to the sidewalls of the barrel to prevent solids build up on the surface of the filter.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, filter wear is presently only detectable by analysis of changes in the output streams. Even more beneficial results may, therefore, be obtained when a camera is mounted within the barrel to monitor the condition of the filter.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, in the prior art the liquid mixture was fed into the barrel from above by a gravity feed. This works well for high rpm applications, but is not suited for low rpm applications.
An example of a low rpm application is a liquid mixture with a high solids content. At high rpm the filter cannot withstand a bombardment of solid particles from a liquid mixture with a high solids content. To preserve the filter the rpm must be reduced. However, when the rpm is reduced the gravity feed is no longer effective as a portion of the input will fall by force of gravity directly from the inlet to the outlet without the desired filtration occurring. Even more beneficial results may, therefore, be obtained when a central column is provided within the barrel having at least one inlet. Fluids can then be pumped up the central column through the inlet for low rpm applications. It is preferred that at least one pair of opposed inlets positioned on the central column.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, wherein:
FIGURE 1 is a side elevation view, in section of a centrifugal filtration apparatus constructed in accordance with 5 the teachings of the present invention.
FIGURE 2 is a side elevation view, in section, of a containment chamber of the centrifugal filtration apparatus illustrated in FIGURE 1, with a top closure in a raised position.
FIGURE 3 is a detailed side elevation view, in section, of an actuator and a guide for raising the top closure as illustrated in FIGURE 2.
FIGURE 4 is a detailed top plan view, in section, of containment walls for the centrifugal filtration apparatus illustrated in FIGURE 1.
FIGURE 5 is a side elevation view of containment walls for the centrifugal filtration apparatus illustrated in FIGURE 4.
FIGURE 6 is a side elevation view, in section, of a barrel of the centrifugal filtration apparatus illustrated in FIGURE
1.
FIGURE 7 is a detailed side elevation view, in section, of a liquid balancing tube and attachment flange for the barrel of the centrifugal filtration apparatus illustrated in FIGURE
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, even a slight weight imbalance can adversely affect the high speed rotation of the barrel. It is, therefore, preferred that the top portion and the bottom portion are substantially symmetrical. It is also preferred that at least one circumferential liquid filled balancing tube is secured around an exterior surface of the barrel.
There are various ways of detachably fastening the top portion and the bottom portion of the barrel. One way is to provide both the top portion and the bottom portion with attachment flanges. These attachment flanges can be secured together with fasteners, such as bolts.
There are various ways of lifting top closure. One way is to provide telescopically extendible actuators, such as hydraulic cylinders.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, even more beneficial results may be obtained when the movement of the actuators is guided by guides that guide the movement of the top closure.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, the surface of the filter must be kept clear of solids build up if it is to function as intended. Even more beneficial results may, therefore, be obtained when scraper blades are disposed within the interior cavity of the barrel.
The scraper blades are spaced closely to the sidewalls of the barrel to prevent solids build up on the surface of the filter.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, filter wear is presently only detectable by analysis of changes in the output streams. Even more beneficial results may, therefore, be obtained when a camera is mounted within the barrel to monitor the condition of the filter.
Although beneficial results may be obtained through the use of the centrifugal filtration apparatus, as described above, in the prior art the liquid mixture was fed into the barrel from above by a gravity feed. This works well for high rpm applications, but is not suited for low rpm applications.
An example of a low rpm application is a liquid mixture with a high solids content. At high rpm the filter cannot withstand a bombardment of solid particles from a liquid mixture with a high solids content. To preserve the filter the rpm must be reduced. However, when the rpm is reduced the gravity feed is no longer effective as a portion of the input will fall by force of gravity directly from the inlet to the outlet without the desired filtration occurring. Even more beneficial results may, therefore, be obtained when a central column is provided within the barrel having at least one inlet. Fluids can then be pumped up the central column through the inlet for low rpm applications. It is preferred that at least one pair of opposed inlets positioned on the central column.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, wherein:
FIGURE 1 is a side elevation view, in section of a centrifugal filtration apparatus constructed in accordance with 5 the teachings of the present invention.
FIGURE 2 is a side elevation view, in section, of a containment chamber of the centrifugal filtration apparatus illustrated in FIGURE 1, with a top closure in a raised position.
FIGURE 3 is a detailed side elevation view, in section, of an actuator and a guide for raising the top closure as illustrated in FIGURE 2.
FIGURE 4 is a detailed top plan view, in section, of containment walls for the centrifugal filtration apparatus illustrated in FIGURE 1.
FIGURE 5 is a side elevation view of containment walls for the centrifugal filtration apparatus illustrated in FIGURE 4.
FIGURE 6 is a side elevation view, in section, of a barrel of the centrifugal filtration apparatus illustrated in FIGURE
1.
FIGURE 7 is a detailed side elevation view, in section, of a liquid balancing tube and attachment flange for the barrel of the centrifugal filtration apparatus illustrated in FIGURE
6.
FIGURE 8 is a detailed side elevation view, in section, of a gravity fed upper fluid inlet.
FIGURE 9 is a side elevation view, in section, of a central column with a pump fed lower fluid inlet.
FIGURE 10 is a top plan view, in section, of the lower fluid inlet in FIGURE 9.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a centrifugal filtration apparatus generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 10.
Referring to FIGURES 1 and 6, centrifugal filtration apparatus 10 includes a containment chamber 12 having a top closure 14, peripheral containment walls 16 and a bottom 18.
A perforated barrel 20 is mounted for high speed rotation within the containment chamber 12. Barrel 20 has sidewalls 22 defining an interior cavity 24. Barrel 20 has a top portion 26 and a bottom portion 28 that are detachably secured together. Top portion 26 of barrel 20 is rotatably mounted to top closure 14 of containment chamber 12 and bottom portion 28 of barrel 20 is rotatably mounted to bottom 18 of containment chamber 12. The top portion 26 and the bottom portion 28 are substantially symmetrical. Referring to FIGURE 7, top portion 26 and bottom portion 28 of barrel 20 both have attachment flanges 30, 32 that are secured together with fasteners 34.
A circumferential liquid filled balancing tube 36 is secured around an exterior surf ace 3 8 of the barrel 2 0 . A barrel shaped filter 40 is provided that has a first half 40a and a second half 40b. Hook Tape fastening strips 42 sold under the Trade Mark VELCRO are glued to sidewalls 22 within interior cavity 24 of both top portion 26 and bottom portion 28 of barrel 20.
Filter 40 mates with hook tape fastener strips 42 to secure filter 40 to barrel. First half 40a is secured to top portion 26 and second half 40b is secured to bottom portion 28. In addition, both first half 40a and second half 40b have a flange 41. Flanges 41 are clamped between attachment flanges 30 and 32 of top portion 26 and bottom portion 28 when barrel 20 is secured together. Referring again to FIGURES 1 and 6, an inlet 44 comprising an inlet chamber 46 and inlet pipe 48 is provided for passage of liquids into barrel 20. A first outlet 50 is provided for passage of heavy liquids and separated solids from barrel 20. A second outlet 52 is provided for passage of light liquids that have passed through perforated barrel 20, from containment chamber 12 into a containment vessel 53. Referring to FIGURES 4 and 5, containment chamber 12 has an access door 68 detachably secured to and matching the cylindrical shape of sidewalls 14, thereby providing access to barrel 20 for the purpose of detaching top portion 26 of barrel 20 from bottom portion 28. Referring to FIGURES 1 through 3, a plurality of telescopically extendible actuators 54 are provided for raising top closure 14 of containment chamber 12, thereby providing access to barrel 20 for the purpose of changing filter 40. A
plurality of guides 56 are provided to guide the movement of top closure 14. Referring again to FIGURES 1 and 6, a plurality of side scraper blades 60 and a plurality of bottom scraper blades 62 are disposed within interior cavity 24 of barrel 20. Side scraper blades 60 and bottom scraper blades 62 are mounted rigidly to a lower shaft assembly 64 by means of a plurality of brackets 66. Side scraper blades 60 are spaced closely to sidewalls 22 of barrel 20. Bottom scraper blades 62 are spaced closely to sloped bottom 29 of barrel 20.
Referring to FIGURE 2, A camera 39 is mounted within barrel 20 to monitor the condition of filter 40. Camera is mounted on a swivel and can remotely controlled to pivot upon the swivel as may be required to permit inspection of different areas of the filter. Referring again to FIGURE 1, the ancillary and support equipment for centrifugal filtration apparatus 10, an hydraulic fluid supply unit 69 and an hydraulic drive 70. An upper shaft assembly 71 and a lower shaft assembly 64 is provided for rotation of barrel 20. A discharge pump 74 is provided for removing accumulated liquids from containment vessel 53. A solids discharge auger 76 is provided for carrying discharged solids and non-filtered liquids. A
supporting structure 78 is provided for mounting and transporting the components that comprise with apparatus 10.
At each location where components of the said assembly are joined together, and at each location at which a component part of said assembly rotates relative to another component part, a connector and seal (not shown) are provided. A set of stairs 80 and a railing 82 are provided to allow an operator to access a control box 84 and a tool box 86 mounted on supporting structure 78. There are two inlets provided into barrel 20, depending upon the nature of the application. For high rpm applications it is preferred that fluids be gravity fed from above into barrel 20. Referring to FIGURE 8, a deflector or spreader 49 is provided to direct fluid entering barrel 20 along a path parallel to filter 40. Once the fluid is moving parallel to filter 40, the fluid is forced against the filter by centrifugal force. For low rpm applications, gravity feeding fluids from above is not workable, as the fluids fall parallel to filter 40, but the centrifugal force is not sufficient to force the fluid against filter 40. The result is that a portion of the fluids fall directly to outlet 50 without engaging filter 40. For low rpm applications an alternative feed mechanism is required. Referring to FIGURE
FIGURE 8 is a detailed side elevation view, in section, of a gravity fed upper fluid inlet.
FIGURE 9 is a side elevation view, in section, of a central column with a pump fed lower fluid inlet.
FIGURE 10 is a top plan view, in section, of the lower fluid inlet in FIGURE 9.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a centrifugal filtration apparatus generally identified by reference numeral 10, will now be described with reference to FIGURES 1 through 10.
Referring to FIGURES 1 and 6, centrifugal filtration apparatus 10 includes a containment chamber 12 having a top closure 14, peripheral containment walls 16 and a bottom 18.
A perforated barrel 20 is mounted for high speed rotation within the containment chamber 12. Barrel 20 has sidewalls 22 defining an interior cavity 24. Barrel 20 has a top portion 26 and a bottom portion 28 that are detachably secured together. Top portion 26 of barrel 20 is rotatably mounted to top closure 14 of containment chamber 12 and bottom portion 28 of barrel 20 is rotatably mounted to bottom 18 of containment chamber 12. The top portion 26 and the bottom portion 28 are substantially symmetrical. Referring to FIGURE 7, top portion 26 and bottom portion 28 of barrel 20 both have attachment flanges 30, 32 that are secured together with fasteners 34.
A circumferential liquid filled balancing tube 36 is secured around an exterior surf ace 3 8 of the barrel 2 0 . A barrel shaped filter 40 is provided that has a first half 40a and a second half 40b. Hook Tape fastening strips 42 sold under the Trade Mark VELCRO are glued to sidewalls 22 within interior cavity 24 of both top portion 26 and bottom portion 28 of barrel 20.
Filter 40 mates with hook tape fastener strips 42 to secure filter 40 to barrel. First half 40a is secured to top portion 26 and second half 40b is secured to bottom portion 28. In addition, both first half 40a and second half 40b have a flange 41. Flanges 41 are clamped between attachment flanges 30 and 32 of top portion 26 and bottom portion 28 when barrel 20 is secured together. Referring again to FIGURES 1 and 6, an inlet 44 comprising an inlet chamber 46 and inlet pipe 48 is provided for passage of liquids into barrel 20. A first outlet 50 is provided for passage of heavy liquids and separated solids from barrel 20. A second outlet 52 is provided for passage of light liquids that have passed through perforated barrel 20, from containment chamber 12 into a containment vessel 53. Referring to FIGURES 4 and 5, containment chamber 12 has an access door 68 detachably secured to and matching the cylindrical shape of sidewalls 14, thereby providing access to barrel 20 for the purpose of detaching top portion 26 of barrel 20 from bottom portion 28. Referring to FIGURES 1 through 3, a plurality of telescopically extendible actuators 54 are provided for raising top closure 14 of containment chamber 12, thereby providing access to barrel 20 for the purpose of changing filter 40. A
plurality of guides 56 are provided to guide the movement of top closure 14. Referring again to FIGURES 1 and 6, a plurality of side scraper blades 60 and a plurality of bottom scraper blades 62 are disposed within interior cavity 24 of barrel 20. Side scraper blades 60 and bottom scraper blades 62 are mounted rigidly to a lower shaft assembly 64 by means of a plurality of brackets 66. Side scraper blades 60 are spaced closely to sidewalls 22 of barrel 20. Bottom scraper blades 62 are spaced closely to sloped bottom 29 of barrel 20.
Referring to FIGURE 2, A camera 39 is mounted within barrel 20 to monitor the condition of filter 40. Camera is mounted on a swivel and can remotely controlled to pivot upon the swivel as may be required to permit inspection of different areas of the filter. Referring again to FIGURE 1, the ancillary and support equipment for centrifugal filtration apparatus 10, an hydraulic fluid supply unit 69 and an hydraulic drive 70. An upper shaft assembly 71 and a lower shaft assembly 64 is provided for rotation of barrel 20. A discharge pump 74 is provided for removing accumulated liquids from containment vessel 53. A solids discharge auger 76 is provided for carrying discharged solids and non-filtered liquids. A
supporting structure 78 is provided for mounting and transporting the components that comprise with apparatus 10.
At each location where components of the said assembly are joined together, and at each location at which a component part of said assembly rotates relative to another component part, a connector and seal (not shown) are provided. A set of stairs 80 and a railing 82 are provided to allow an operator to access a control box 84 and a tool box 86 mounted on supporting structure 78. There are two inlets provided into barrel 20, depending upon the nature of the application. For high rpm applications it is preferred that fluids be gravity fed from above into barrel 20. Referring to FIGURE 8, a deflector or spreader 49 is provided to direct fluid entering barrel 20 along a path parallel to filter 40. Once the fluid is moving parallel to filter 40, the fluid is forced against the filter by centrifugal force. For low rpm applications, gravity feeding fluids from above is not workable, as the fluids fall parallel to filter 40, but the centrifugal force is not sufficient to force the fluid against filter 40. The result is that a portion of the fluids fall directly to outlet 50 without engaging filter 40. For low rpm applications an alternative feed mechanism is required. Referring to FIGURE
9, a tubular central support column 90 is provided in barrel 20. Support column 90 provides a flow channel 92 for the flow of fluids pumped from below. Flow channel has at least one pair of opposed outlets 94. Referring to FIGURE 10, outlets 94 are in the form of arms that extend radially outwardly terminating in a plurality of spray jets 96. Spray jets 96 are positioned in close proximity, within approximately 2 1/2 inches, of filter 40. Referring to FIGURE 9, scrapers 98 are mounted to the radial arms that serve as outlets 94, so that spray jets 96 are positioned behind scrapers 98.
The use and operation of apparatus 10 will now be described with reference to FIGURES 1 through 10. Referring to FIGURE l, centrifugal separation is performed by apparatus 10. Mixed liquids pass through inlet pipe 44 into inlet chamber 46. From inlet chamber 46 mixed liquids pass along inlet feed pipe 48 and are gravity fed into barrel 20.
Referring to FIGURE 8, deflector or spreader 49 directs liquids entering barrel 20 along a path parallel to filter 40, these liquids are forced outwardly against filter 40 by the centrifugal force generated by barrel 20 which is rotated at high rpm by hydraulic drive 70. Light liquids pass through filter 40 and the perforations in barrel 20 into containment chamber 12. From containment chamber 12 they drain through second outlet 52 into containment vessel 53. Heavier liquids or solids that will not pass through filter 40 migrate along filter 40 until they reach first outlet 50 leading to discharge auger 76. The effectiveness of the filtration process is dependent upon the condition of filter 40. The condition of filter 40 is, therefore, monitored by camera 39. When filter 40 visually appears to be becoming clogged, water is circulated through inlet 44 into barrel 20 to wash filter 40. After washing, filter 40 is further inspected by camera 39. If filter 40 is in good condition, the process of centrifugal separation is continued. If filter 40 is seen to be showing visual signs of wear, the process of centrifugal separation is discontinued and steps are taken to replace filter 40.
Referring to FIGURES 4 and 5, maintenance personnel gain access to containment chamber 12 through access door 68. Referring to FIGURE 7, once within containment chamber 12 maintenance personnel remove fasteners 34 that extend through attachment flanges 30 and 32 to secure top portion 26 and bottom portion 28 of barrel 20 together. Referring to FIGURE 2, once fasteners 34 are removed hydraulic fluid can be provided to telescopically extend actuators 54 by hydraulic fluid supply unit 69, thereby raising top closure 14 off of containment chamber 12. The movement of top closure 14 is guided and made more stable by guides 56. This provides ready access to change filter 40. Filter 40 comes into two halves with first half 40a secured to top portion 26 and second half 40b secured to bottom portion 28. The means of securement is with tape fastener strips 42, from which filter 40 can be readily detached. Once filter 40 has been replaced, top closure 14 is lowered back onto containment chamber 12. Maintenance personnel then secure top portion 26 and bottom portion 28 of barrel 20 together by inserting fasteners 34 through flanges 30 and 32, respectively.
Access door 68 is then locked into position in preparation for the resumption of centrifugal filtration.
In low rpm applications, a gravity fed entry of liquids through inlet 44 will not work properly. A portion of the liquids fall parallel to filter 40, as the centrifugal force generated by the rotation of barrel 20 is not sufficient to force the liquids against filter 40. In order to avoid a portion of the fluids falling directly to outlet 50 without engaging filter 40, for low rpm applications the alternative feed mechanism illustrated in FIGURES 9 and 10 is used.
Referring to FIGURE 9, liquids are pumped from below up flow channel 92 of central support column 90. The liquids are then 5 sprayed under pressure through the spray jets 96 on the radially extending arms that serve as outlets 94.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without 10 departing from the spirit and scope of the invention as hereinafter defined in the Claims.
The use and operation of apparatus 10 will now be described with reference to FIGURES 1 through 10. Referring to FIGURE l, centrifugal separation is performed by apparatus 10. Mixed liquids pass through inlet pipe 44 into inlet chamber 46. From inlet chamber 46 mixed liquids pass along inlet feed pipe 48 and are gravity fed into barrel 20.
Referring to FIGURE 8, deflector or spreader 49 directs liquids entering barrel 20 along a path parallel to filter 40, these liquids are forced outwardly against filter 40 by the centrifugal force generated by barrel 20 which is rotated at high rpm by hydraulic drive 70. Light liquids pass through filter 40 and the perforations in barrel 20 into containment chamber 12. From containment chamber 12 they drain through second outlet 52 into containment vessel 53. Heavier liquids or solids that will not pass through filter 40 migrate along filter 40 until they reach first outlet 50 leading to discharge auger 76. The effectiveness of the filtration process is dependent upon the condition of filter 40. The condition of filter 40 is, therefore, monitored by camera 39. When filter 40 visually appears to be becoming clogged, water is circulated through inlet 44 into barrel 20 to wash filter 40. After washing, filter 40 is further inspected by camera 39. If filter 40 is in good condition, the process of centrifugal separation is continued. If filter 40 is seen to be showing visual signs of wear, the process of centrifugal separation is discontinued and steps are taken to replace filter 40.
Referring to FIGURES 4 and 5, maintenance personnel gain access to containment chamber 12 through access door 68. Referring to FIGURE 7, once within containment chamber 12 maintenance personnel remove fasteners 34 that extend through attachment flanges 30 and 32 to secure top portion 26 and bottom portion 28 of barrel 20 together. Referring to FIGURE 2, once fasteners 34 are removed hydraulic fluid can be provided to telescopically extend actuators 54 by hydraulic fluid supply unit 69, thereby raising top closure 14 off of containment chamber 12. The movement of top closure 14 is guided and made more stable by guides 56. This provides ready access to change filter 40. Filter 40 comes into two halves with first half 40a secured to top portion 26 and second half 40b secured to bottom portion 28. The means of securement is with tape fastener strips 42, from which filter 40 can be readily detached. Once filter 40 has been replaced, top closure 14 is lowered back onto containment chamber 12. Maintenance personnel then secure top portion 26 and bottom portion 28 of barrel 20 together by inserting fasteners 34 through flanges 30 and 32, respectively.
Access door 68 is then locked into position in preparation for the resumption of centrifugal filtration.
In low rpm applications, a gravity fed entry of liquids through inlet 44 will not work properly. A portion of the liquids fall parallel to filter 40, as the centrifugal force generated by the rotation of barrel 20 is not sufficient to force the liquids against filter 40. In order to avoid a portion of the fluids falling directly to outlet 50 without engaging filter 40, for low rpm applications the alternative feed mechanism illustrated in FIGURES 9 and 10 is used.
Referring to FIGURE 9, liquids are pumped from below up flow channel 92 of central support column 90. The liquids are then 5 sprayed under pressure through the spray jets 96 on the radially extending arms that serve as outlets 94.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without 10 departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (28)
1. A centrifugal filtration apparatus, comprising:
a containment chamber having a top closure;
a perforated barrel mounted for high speed rotation within the containment chamber, the barrel having sidewalls defining an interior cavity;
means for mounting a filter to the sidewalls within the interior cavity of the barrel;
means for accessing the interior cavity of the barrel for the purpose of changing the filter;
at least one inlet for passage of liquids into the barrel;
a first outlet for passage of liquids that cannot pass through the filter and separated solids from the barrel;
a second outlet for passage of liquids that have passed through the perforated barrel from the containment chamber;
means for raising the top closure of the containment chamber, thereby providing access to the barrel for the purpose of changing the filter.
a containment chamber having a top closure;
a perforated barrel mounted for high speed rotation within the containment chamber, the barrel having sidewalls defining an interior cavity;
means for mounting a filter to the sidewalls within the interior cavity of the barrel;
means for accessing the interior cavity of the barrel for the purpose of changing the filter;
at least one inlet for passage of liquids into the barrel;
a first outlet for passage of liquids that cannot pass through the filter and separated solids from the barrel;
a second outlet for passage of liquids that have passed through the perforated barrel from the containment chamber;
means for raising the top closure of the containment chamber, thereby providing access to the barrel for the purpose of changing the filter.
2. The centrifugal filtration apparatus as defined in Claim 1, wherein the barrel has a top portion and a bottom portion that are detachably secured together.
3. The centrifugal filtration apparatus as defined in Claim 2, wherein the containment chamber has an access door, thereby providing access to the barrel for the purpose of detaching the top portion of the barrel from the bottom portion.
4. The centrifugal filtration apparatus as defined in Claim 2, wherein the top portion and the bottom portion are substantially symmetrical.
5. The centrifugal filtration apparatus as defined in Claim 2, wherein the top portion of the barrel is rotatably mounted to the top closure and the bottom portion is rotatably mounted to a bottom of the containment chamber.
6. The centrifugal filtration apparatus as defined in Claim 2, wherein the top portion and the bottom portion both have attachment flanges that are secured together with fasteners.
7. The centrifugal filtration apparatus as defined in Claim 1, wherein at least one circumferential liquid filled balancing tube is secured around an exterior surface of the barrel.
8. The centrifugal filtration apparatus as defined in Claim 1, wherein telescopically extendible actuators are the means for raising the top closure of the containment chamber.
9. The centrifugal filtration apparatus as defined in Claim 1, wherein guides are provided to guide the movement of the top closure.
10. The centrifugal filtration apparatus as defined in Claim 1, wherein scraper blades are disposed within the interior cavity of the barrel, the scraper blades being spaced closely to the sidewalls of the barrel.
11. The centrifugal filtration apparatus as defined in Claim 1, wherein a camera is mounted within the barrel to monitor the condition of the filter.
12. The centrifugal filtration apparatus as defined in Claim 2, wherein a filter is provided that has a first half mounted within the top portion of the barrel and a second half mounted within the bottom portion of the barrel.
13. The centrifugal filtration apparatus as defined in Claim 1, wherein the at least one inlet is positioned at the top of the barrel.
14. The centrifugal filtration apparatus as defined in Claim 1, wherein an central column is provided within the barrel and the at least one inlet is positioned on the central column.
15. The centrifugal filtration apparatus as defined in Claim 13, wherein fluids are fed by force of gravity from above through at least one pair of opposed inlets positioned in the top of the barrel.
16. The centrifugal filtration apparatus as defined in Claim 14, wherein fluids are pumped up the central column through at least one pair of opposed inlets positioned on the central column.
17. A centrifugal filtration apparatus, comprising:
a containment chamber having a top closure, peripheral containment walls and a bottom;
a perforated barrel mounted for high speed rotation within the containment chamber, the barrel having sidewalls defining an interior cavity, the barrel having a top portion and a bottom portion that are detachably secured together, the top portion of the barrel being rotatably mounted to the top closure and the bottom portion is rotatably mounted to the bottom of the containment chamber;
means for mounting a top half of a filter to the sidewalk within the interior cavity of the top portion of the barrel;
means for mounting a bottom half of a filter to the sidewalls within the interior cavity of the bottom portion of the barrel;
at least one inlet for passage of liquids into the barrel;
a first outlet for passage of heavy liquids and separated solids from the barrel;
a second outlet for passage of light liquids that have passed through the perforated barrel from the containment chamber;
the containment chamber having an access door, thereby providing access to the barrel for the purpose of detaching the top portion of the barrel from the bottom portion;
telescopically extendible actuators for raising the top closure of the containment chamber, thereby providing access to the barrel for the purpose of changing the filter.
a containment chamber having a top closure, peripheral containment walls and a bottom;
a perforated barrel mounted for high speed rotation within the containment chamber, the barrel having sidewalls defining an interior cavity, the barrel having a top portion and a bottom portion that are detachably secured together, the top portion of the barrel being rotatably mounted to the top closure and the bottom portion is rotatably mounted to the bottom of the containment chamber;
means for mounting a top half of a filter to the sidewalk within the interior cavity of the top portion of the barrel;
means for mounting a bottom half of a filter to the sidewalls within the interior cavity of the bottom portion of the barrel;
at least one inlet for passage of liquids into the barrel;
a first outlet for passage of heavy liquids and separated solids from the barrel;
a second outlet for passage of light liquids that have passed through the perforated barrel from the containment chamber;
the containment chamber having an access door, thereby providing access to the barrel for the purpose of detaching the top portion of the barrel from the bottom portion;
telescopically extendible actuators for raising the top closure of the containment chamber, thereby providing access to the barrel for the purpose of changing the filter.
18. The centrifugal filtration apparatus as defined in Claim 17, wherein the top portion and the bottom portion are substantially symmetrical.
19. The centrifugal filtration apparatus as defined in Claim 17, wherein the top portion and the bottom portion both have attachment flanges that are secured together with fasteners.
15~
15~
20. The centrifugal filtration apparatus as defined in Claim 17, wherein at least one circumferential liquid filled balancing tube is secured around an exterior surface of the barrel.
21. The centrifugal filtration apparatus as defined in Claim 17, wherein guides are provided to guide the movement of the top closure.
22. The centrifugal filtration apparatus as defined in Claim 17, wherein scraper blades are disposed within the interior cavity of the barrel, the scraper blades being spaced closely to the sidewalls of the barrel.
23. The centrifugal filtration apparatus as defined in Claim 17, wherein a camera is mounted within the barrel to monitor the condition of the filter.
24. The centrifugal filtration apparatus as defined in Claim 17, wherein a filter is provided that has a first half mounted within the top portion of the barrel and a second half mounted within the bottom portion of the barrel, the first half of the filter and the second half of the filter both having flanges that are clamped between the attachment flanges of the top portion and the bottom portion of the barrel.
25. The centrifugal filtration apparatus as defined in Claim 17, wherein the at least one inlet is positioned at the top of the barrel.
26. The centrifugal filtration apparatus as defined in Claim 17 wherein a central column is provided within the barrel and the at least one inlet is positioned on the central column.
27. The centrifugal filtration apparatus as defined in Claim 25, wherein fluids are fed by force of gravity from above through at least one pair of opposed inlets positioned in the top of the barrel.
28. The centrifugal filtration apparatus as defined in Claim 26, wherein fluids are pumped up the central column through at least one pair of opposed inlets positioned on the central column.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2262887A CA2262887C (en) | 1999-02-24 | 1999-02-24 | Centrifugal filtration apparatus |
| PCT/CA2000/000176 WO2000050150A1 (en) | 1999-02-24 | 2000-02-24 | Centrifugal filtration apparatus |
| AU27879/00A AU2787900A (en) | 1999-02-24 | 2000-02-24 | Centrifugal filtration apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2262887A CA2262887C (en) | 1999-02-24 | 1999-02-24 | Centrifugal filtration apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2262887A1 CA2262887A1 (en) | 2000-08-24 |
| CA2262887C true CA2262887C (en) | 2012-07-17 |
Family
ID=4163327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2262887A Expired - Fee Related CA2262887C (en) | 1999-02-24 | 1999-02-24 | Centrifugal filtration apparatus |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2787900A (en) |
| CA (1) | CA2262887C (en) |
| WO (1) | WO2000050150A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112169419A (en) * | 2020-09-28 | 2021-01-05 | 廖琼红 | Device for filtering rapeseed oil impurities by using centrifugal force to trigger piezoelectric effect |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1091043B (en) * | 1958-07-03 | 1960-10-13 | Karl Marx Stadt Maschf | Lid locking device for centrifuges or ae. Machines with a hydraulically or pneumatically controlled pressure cylinder |
| US3669879A (en) * | 1969-12-15 | 1972-06-13 | Dresser Ind | Fluid separation apparatus and method |
| US3937397A (en) * | 1974-08-28 | 1976-02-10 | The De Laval Separator Company | Basket centrifuge |
| US5004453A (en) * | 1988-07-29 | 1991-04-02 | Hitachi Koko Company, Limited | Centrifuge |
| CA2034918A1 (en) * | 1991-01-25 | 1992-07-26 | Axbridge Holdings Ltd. | Rotational member of a centrifuge |
-
1999
- 1999-02-24 CA CA2262887A patent/CA2262887C/en not_active Expired - Fee Related
-
2000
- 2000-02-24 AU AU27879/00A patent/AU2787900A/en not_active Abandoned
- 2000-02-24 WO PCT/CA2000/000176 patent/WO2000050150A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CA2262887A1 (en) | 2000-08-24 |
| WO2000050150A1 (en) | 2000-08-31 |
| AU2787900A (en) | 2000-09-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDC | Correction of dead application (reinstatement) | ||
| MKLA | Lapsed |
Effective date: 20180226 |