CA1060355A - Integral two-stage separator - Google Patents
Integral two-stage separatorInfo
- Publication number
- CA1060355A CA1060355A CA226,631A CA226631A CA1060355A CA 1060355 A CA1060355 A CA 1060355A CA 226631 A CA226631 A CA 226631A CA 1060355 A CA1060355 A CA 1060355A
- Authority
- CA
- Canada
- Prior art keywords
- cylinder
- gas
- open end
- vortex
- cylinders
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
- B04C5/15—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations with swinging flaps or revolving sluices; Sluices; Check-valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/24—Multiple arrangement thereof
- B04C5/26—Multiple arrangement thereof for series flow
Landscapes
- Cyclones (AREA)
Abstract
ABSTRACT
A centrifugal gas cleaner of two stages in which the feedback vortex from an element in the second stage is arranged to augment the vortex carried forward from the first stage, and an intermediate plenum is provided to facilitate this: the cleaner also incorporates automatic means for dis-charging the matter collected.
A centrifugal gas cleaner of two stages in which the feedback vortex from an element in the second stage is arranged to augment the vortex carried forward from the first stage, and an intermediate plenum is provided to facilitate this: the cleaner also incorporates automatic means for dis-charging the matter collected.
Description
1~0355 Background of the Invention This invention relates to the field of separators and particularly to apparatus for removing particulate matter from a gas on which it is born. Centrifugal separators using the cyclone principal for this purposear2known, and it is indeed known to construct two stage separators of this type.
They suffer however from several disadvantages when used to remove ~rom air the dust encountered in the practice of the mechanized rock drilling process, with high limestone content, small mean particles size, and high concentration. Normal clusters of small precisely dimensioned cyclone tubes plug rapidly, while larger gross cyclone tubes do not provide the needed separation efficiency. There is need for a separator which removes gross amounts of dust with high efficiency.
Summary of the Invention The present invention solves the problem by utilizing an improved two sta~e separation process in a single body.
The particle-laden gas is admitted tangentially into the first stage which removes most of the larger particles. The gas then passes to the second stage through a plenum in which the vortex energy of the gas is reinforced by the feedback vortex from a helical element in the second stage. This arrangement maximizes the centrifugal or separation energy obtainable from a given fan or blower horsepower, and is accomplished by angularly positioning the vane optimally, about the axis of the apparatus, with respect to the location of the tangential input. This arrangement has given up to 97% total separation efficiency. It also lends to a very efficient and compact arrangement for automatically discharging the collected particles 1~0355 each time the flow of gas through the apparatus is interrupted, and this arrangement is also a part of the invention.
The invention provides apparatus for removing particulate matter from a gas on which it is borne comprising, in combination: a first cylinder having a vertical axis, a lower end, and a closed upper end; a second, concentric cylinder having a closed upper end and an open end pro-ecting downward partially into the first cylinder; a third, concentric cylinder having a lower end and an open end proiecting upward partially into the open end of the second cylinder; a fourth, concentric cylinder having an 1~ open end pro~ecting downward partially into the open end of said third cylinder and an open end pro~ecting through the top of said second cylinder to comprise the gas outlet for the apparatus; input means for admitting gas bearing particulate matter tangentially into the first cylinder to cause vortical gas movement in the first cylinder; a helical partition extending downwardly in the space between said third and fourth cylinders, the downward direction of the helix being the same as the direction of the vortex in the first cylinder, said helical partition being angularly positioned, about said axis, relative to the location of said longitudinal input, for maximum conservation of vortical momentum of the gas; and means at the lower ends of the first and third cylinders for gravitationally receiving particulate matter centrifugally driven to the inner walls of the cylinders.
~arious advantages, and features of novelty which characteriæe our invention are pointed out with particularity in the claims annexed hereto and forming a part hereof. However, in a better understanding of the invention, its advantages and objects attained by its use, reference should be had to the drawing which forms a further part hereof, and to the accompanying descriptive matter, in which there is illustrated and described a preferred embodiment of the invention.
Description of the Drawing In the drawing Figure 1 is a plan view of apparatus embodying the invention;
Figure 2 is an elevation of the apparatus, parts being broken away .~ ~
1~603S5 for clarity of illustration;
Figure 3 is a section along the lines 3-3 of Figure 2;
-2a-~)60355 Figure 4 is a section along the line 4-4 of Figure 2;
Figures S and 6 are fragmentary views of a portion of the apparatus, partially in section;
Figure 7 is a section on the line 7-7 of Figure 6;
and Figure 8 is a section on the line 8-8 of Figure 2 showing the operation of a portion of the apparatus.
Description of the Preferred Embodiment Turning now to the drawing, the invention is seen to comprise a plurality of coaxial cylinders 10, 11, 12 and 13 of sheet metal. A plenum 14 is arranged to supply gas laden with particulate matter into cylinder 10 along an element 15 of the cylinder. The top of cylinder 10 is closed to comprise a downwardly helical surface 16.
Cylinder 11 has an open end 17 that projects down-wardly into cylinder 10 and is closed at its upper end by a domed cap 20 which projects above top 16 of cylinder 10.
Cylinder 12 has an open upper end 21 which projects upwardly into cylinder 11. The lower end of cylinder 12 is reduced in diameter at 22, and is supported in cylinder 10 by diagonally mounted braces 23.
Cylinder 13 has a first open end 24 which projects downwardly into cylinder 12, and a second open end 25 which projects upwardly through cap 20 of cylinder 11 to comprise the outlet for the apparatus.
A helical vane or partition 26 extends downwardly in the space between cylinders 12 and 13. The downward slope of partition 26 is in the same direction as that of helical surface 16.
Cylinder 10 is surrounded at its base by a cover ~60355 plate 27 and rests, with its axis vertical, on a hopper structure comprising a pair of side walls 30 and 31, front and rear walls 32 and 33, and a mounting angle 34 extending between side walls 30 and 31. A sloping bottom plate 35 completes the hopper, into which particulate matter falling from the cylinder is received, the hopper comprising a central chamber 36 bounded by the reduced extension 12a of cylinder 12, for receiving particles from cylinders 12 and 13 and partition 26, and a separate outer chamber 37 for receiving particles falling from cylinders 10 and 11. A counter-weighted door 40 is provided in bottom plate 35 to permit matter collected in chamber 36 to be discharged, and a second door 60 is provided at the bottom of front wall 32, to permit discharge of matter collected in space 37.
As shown in Figures 2 and 6, door 40 comprises a plate 41 having a pair of ears 42 bored to pass a pin 43 which is pivoted in a tube 44 welded across a leaf 45 of a T-hinge 46: the other leaf 47 is secured bo bottom plate 35 as by bolts 50. A threaded rod 51 is secured to leaf 45 at ~0 an appropriate angle, and carries a counter-weight 52 which ~ay be locked in adjusted position along the rod by a nut 53.
A suitable gasket 54 completes the seal when door 40 is closed.
~he end of leaf 45 projects beyond tube 44 at 55 to limit the pivotal motion of plate 41.
It will be appreciated that when the apparatus is in operation the external atmosphere exerts a force on plate 41 in a direction to maintain the door closed. Counterweight 52 is adjusted to just close the door when no particulate matter is in chamber 36 and the apparatus is not in operation: then if such matter does collect, its mass is opposed by the positive external air pressure as long as the apparatus is in 1~6~355 operation. When air flow out of the apparatus ceases the positive pressure disappears, and the weight of material on plate 41 opens door 40, discharging the collected matter, after which the counterweight again loosely closes the door.
Door 60 is so located that a counterweight arm extend-ing outwardly therefrom would be inconvenient, and an alternative self closing structure is used. As shown in Figures 2 and 7 the lower front edges of sides 30 and 31 are not vertical, but tapQr backward slightly. As shown in Figures 5 and 8, the opening defined by walls 30, 31, 32 and plate 35 is surrounded on three sides by a channel 61 which is connected by a T-pipe 62 with extention 12a. A door panel 63 is made up of an inner layer 64 of soft material, and intermediate layer 65 of stiffer yet still flexible material, and an outer reinforcing layer 66 of material stiff enough to prevent collapse of the materials under pressure differential, the layers being secured together by suitable means such as rivet 67. Layers 64 and 65 project upwardly from the panel and are clamped to front wall 32 by a plate 68 and screws 69, to form a hinge.
In the absence of positive external pressure, door panel 63 hangs vertically, as shown in ~igure 7, and indeed may be pushed outward to allow material in chamber 37 to be dis-charged. When air flow through the apparatus resumes, a negative pressure quickly appears in chambers 36 and 37, and chamber 36 acts through T-pipe 62 and channel 61 to create a flow of air past door panel 63 which swings the do~r shut: it is held there against the weight of gathering of particulate matter until the air flow through the apparatus is discontinued, when discharge of the material again takes place. The venting of channel 61 through T-pipe 62 into chamber 36 of high negative pressure insures high p~èssure differential across door panel 63 at the outer edges to hold the door closed against the large amount 1~60355 o~-con~ami~ah~iico}~ected in Ghambe~37O ~ Figure 7 shows the apparatus with both doors in the discharge positions. In practice it is found that not enough material gathers in chamber 36 during normal use spans of the apparatus to cover the inlet to T-pipe ~2, and in any event the chamber 37 is also at a negative pressure, if perhaps not so great a one as chamber 36.
In one embodiment of the invention the gas to be cleaned was supplied to input plenum 14 through a flanged vertical riser 70 connected to the lower corner of the plenum as seen in Figures 1 and 2.
Operation In use our apparatus is mounted as described, riser 70 is connected to a source of gas bearing particulate matter to be removed, and outlet 25 is connected to a pump or blower which draws gas out of the apparatus. The flow of gas through the apparatus is as shown by the arrows in Figures 2 and 4; a counter clockwise vortical flow occurs inside cylinder 10 which urges the particles toward the wall of the cylinder, down which they drop to chamber 37. In the upper part of cylinder 10 the helical surface redirects the flow of gas in this portion of the cylinder downwardly. The cleaner gas near the axis of the cylinder passes up through the space batween cylinders 11 and 12 into the plenum 72 defined by cap 20. The gas next passes between cylinders 12 and 13, following the helical path defined by partition 26. The area of the channel is less here, so the gas volocity is greater, and partition 26 adds a further vortical component to that already p~ssessed by the gas, so that remaining particles, mostly of smaller mass, are again urged to the wall of the cylinder, this time of cylinder 12, and drop 1~;03SS
therefrom into chamber 36. The cleaned gas passes through opening 24 and out at tube 13, it still may have considerable vortical energy but this is without significance.
The inner walls of cylinders 10 and 12 are two of the principal areas for collecting particulate matter, but some does come to the inner wall of cylinder 11. ~hen this occurs, and as it develops sufficient mass in the contaminant swirl, it will drop from the open end 17, and be carried vortically to cylinder 10 .
A feature of the invention which is of considerable importance relates to the known fact that when a stream of gas approaches a structure such as partition 26, there is produced not only a vortex down stream from the partition, but a "fore"
or "feedback" vortex upstream of the partition. The angular relation, about the axis of the cylinder, between the leading edge 73 of partition 26 and the point of tangency 74 of plenum 14 is carefully chosen so that the "feedback" vortex does not oppose or enturbulate the input vortex, but rather augments it.
In one form of the invent~on it was found that the former ~0 should be advanced by 360 from the latter, but it will be understood that different dimensions of the cylinders, or a different flow rate through the apparatus, may dictate some other angular relation.
It should also be pointed out that the presence of plenum 72 is important to optimum operation of the apparatus:
the plenum must be at least sufficiently large to prevent significant turbulance from interfering with the air flow from cylinder 10 to partition 26.
From the foregoing it will be evident that the inventive contribution disclosed here is an improved two stage centrifugal apparatus for separating gas and particulate matter, the improvement residing in part in the provision of a plenum between the stages, in part in position-ing a vortex enhancing element in the second stage in a proper angular relationship, about the axis of the apparatus, relative to the vortex inducing portion of the first stage, and in part in providing means minimizing the maintainance of the apparatus by automatically discharging particulate matter gathered during each operation of the apparatus.
Numerous objects and advantages of our invention have been set forth in the foregoing description, together with details of the structure and function o the invention, and the novel features thereof are pointed out in the appended claims. The disclosure, however, is illustrative only, and changes may be made in detail especially in matters of shape, size, and arrangement of parts,within the principle of the invention, to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
~0
They suffer however from several disadvantages when used to remove ~rom air the dust encountered in the practice of the mechanized rock drilling process, with high limestone content, small mean particles size, and high concentration. Normal clusters of small precisely dimensioned cyclone tubes plug rapidly, while larger gross cyclone tubes do not provide the needed separation efficiency. There is need for a separator which removes gross amounts of dust with high efficiency.
Summary of the Invention The present invention solves the problem by utilizing an improved two sta~e separation process in a single body.
The particle-laden gas is admitted tangentially into the first stage which removes most of the larger particles. The gas then passes to the second stage through a plenum in which the vortex energy of the gas is reinforced by the feedback vortex from a helical element in the second stage. This arrangement maximizes the centrifugal or separation energy obtainable from a given fan or blower horsepower, and is accomplished by angularly positioning the vane optimally, about the axis of the apparatus, with respect to the location of the tangential input. This arrangement has given up to 97% total separation efficiency. It also lends to a very efficient and compact arrangement for automatically discharging the collected particles 1~0355 each time the flow of gas through the apparatus is interrupted, and this arrangement is also a part of the invention.
The invention provides apparatus for removing particulate matter from a gas on which it is borne comprising, in combination: a first cylinder having a vertical axis, a lower end, and a closed upper end; a second, concentric cylinder having a closed upper end and an open end pro-ecting downward partially into the first cylinder; a third, concentric cylinder having a lower end and an open end proiecting upward partially into the open end of the second cylinder; a fourth, concentric cylinder having an 1~ open end pro~ecting downward partially into the open end of said third cylinder and an open end pro~ecting through the top of said second cylinder to comprise the gas outlet for the apparatus; input means for admitting gas bearing particulate matter tangentially into the first cylinder to cause vortical gas movement in the first cylinder; a helical partition extending downwardly in the space between said third and fourth cylinders, the downward direction of the helix being the same as the direction of the vortex in the first cylinder, said helical partition being angularly positioned, about said axis, relative to the location of said longitudinal input, for maximum conservation of vortical momentum of the gas; and means at the lower ends of the first and third cylinders for gravitationally receiving particulate matter centrifugally driven to the inner walls of the cylinders.
~arious advantages, and features of novelty which characteriæe our invention are pointed out with particularity in the claims annexed hereto and forming a part hereof. However, in a better understanding of the invention, its advantages and objects attained by its use, reference should be had to the drawing which forms a further part hereof, and to the accompanying descriptive matter, in which there is illustrated and described a preferred embodiment of the invention.
Description of the Drawing In the drawing Figure 1 is a plan view of apparatus embodying the invention;
Figure 2 is an elevation of the apparatus, parts being broken away .~ ~
1~603S5 for clarity of illustration;
Figure 3 is a section along the lines 3-3 of Figure 2;
-2a-~)60355 Figure 4 is a section along the line 4-4 of Figure 2;
Figures S and 6 are fragmentary views of a portion of the apparatus, partially in section;
Figure 7 is a section on the line 7-7 of Figure 6;
and Figure 8 is a section on the line 8-8 of Figure 2 showing the operation of a portion of the apparatus.
Description of the Preferred Embodiment Turning now to the drawing, the invention is seen to comprise a plurality of coaxial cylinders 10, 11, 12 and 13 of sheet metal. A plenum 14 is arranged to supply gas laden with particulate matter into cylinder 10 along an element 15 of the cylinder. The top of cylinder 10 is closed to comprise a downwardly helical surface 16.
Cylinder 11 has an open end 17 that projects down-wardly into cylinder 10 and is closed at its upper end by a domed cap 20 which projects above top 16 of cylinder 10.
Cylinder 12 has an open upper end 21 which projects upwardly into cylinder 11. The lower end of cylinder 12 is reduced in diameter at 22, and is supported in cylinder 10 by diagonally mounted braces 23.
Cylinder 13 has a first open end 24 which projects downwardly into cylinder 12, and a second open end 25 which projects upwardly through cap 20 of cylinder 11 to comprise the outlet for the apparatus.
A helical vane or partition 26 extends downwardly in the space between cylinders 12 and 13. The downward slope of partition 26 is in the same direction as that of helical surface 16.
Cylinder 10 is surrounded at its base by a cover ~60355 plate 27 and rests, with its axis vertical, on a hopper structure comprising a pair of side walls 30 and 31, front and rear walls 32 and 33, and a mounting angle 34 extending between side walls 30 and 31. A sloping bottom plate 35 completes the hopper, into which particulate matter falling from the cylinder is received, the hopper comprising a central chamber 36 bounded by the reduced extension 12a of cylinder 12, for receiving particles from cylinders 12 and 13 and partition 26, and a separate outer chamber 37 for receiving particles falling from cylinders 10 and 11. A counter-weighted door 40 is provided in bottom plate 35 to permit matter collected in chamber 36 to be discharged, and a second door 60 is provided at the bottom of front wall 32, to permit discharge of matter collected in space 37.
As shown in Figures 2 and 6, door 40 comprises a plate 41 having a pair of ears 42 bored to pass a pin 43 which is pivoted in a tube 44 welded across a leaf 45 of a T-hinge 46: the other leaf 47 is secured bo bottom plate 35 as by bolts 50. A threaded rod 51 is secured to leaf 45 at ~0 an appropriate angle, and carries a counter-weight 52 which ~ay be locked in adjusted position along the rod by a nut 53.
A suitable gasket 54 completes the seal when door 40 is closed.
~he end of leaf 45 projects beyond tube 44 at 55 to limit the pivotal motion of plate 41.
It will be appreciated that when the apparatus is in operation the external atmosphere exerts a force on plate 41 in a direction to maintain the door closed. Counterweight 52 is adjusted to just close the door when no particulate matter is in chamber 36 and the apparatus is not in operation: then if such matter does collect, its mass is opposed by the positive external air pressure as long as the apparatus is in 1~6~355 operation. When air flow out of the apparatus ceases the positive pressure disappears, and the weight of material on plate 41 opens door 40, discharging the collected matter, after which the counterweight again loosely closes the door.
Door 60 is so located that a counterweight arm extend-ing outwardly therefrom would be inconvenient, and an alternative self closing structure is used. As shown in Figures 2 and 7 the lower front edges of sides 30 and 31 are not vertical, but tapQr backward slightly. As shown in Figures 5 and 8, the opening defined by walls 30, 31, 32 and plate 35 is surrounded on three sides by a channel 61 which is connected by a T-pipe 62 with extention 12a. A door panel 63 is made up of an inner layer 64 of soft material, and intermediate layer 65 of stiffer yet still flexible material, and an outer reinforcing layer 66 of material stiff enough to prevent collapse of the materials under pressure differential, the layers being secured together by suitable means such as rivet 67. Layers 64 and 65 project upwardly from the panel and are clamped to front wall 32 by a plate 68 and screws 69, to form a hinge.
In the absence of positive external pressure, door panel 63 hangs vertically, as shown in ~igure 7, and indeed may be pushed outward to allow material in chamber 37 to be dis-charged. When air flow through the apparatus resumes, a negative pressure quickly appears in chambers 36 and 37, and chamber 36 acts through T-pipe 62 and channel 61 to create a flow of air past door panel 63 which swings the do~r shut: it is held there against the weight of gathering of particulate matter until the air flow through the apparatus is discontinued, when discharge of the material again takes place. The venting of channel 61 through T-pipe 62 into chamber 36 of high negative pressure insures high p~èssure differential across door panel 63 at the outer edges to hold the door closed against the large amount 1~60355 o~-con~ami~ah~iico}~ected in Ghambe~37O ~ Figure 7 shows the apparatus with both doors in the discharge positions. In practice it is found that not enough material gathers in chamber 36 during normal use spans of the apparatus to cover the inlet to T-pipe ~2, and in any event the chamber 37 is also at a negative pressure, if perhaps not so great a one as chamber 36.
In one embodiment of the invention the gas to be cleaned was supplied to input plenum 14 through a flanged vertical riser 70 connected to the lower corner of the plenum as seen in Figures 1 and 2.
Operation In use our apparatus is mounted as described, riser 70 is connected to a source of gas bearing particulate matter to be removed, and outlet 25 is connected to a pump or blower which draws gas out of the apparatus. The flow of gas through the apparatus is as shown by the arrows in Figures 2 and 4; a counter clockwise vortical flow occurs inside cylinder 10 which urges the particles toward the wall of the cylinder, down which they drop to chamber 37. In the upper part of cylinder 10 the helical surface redirects the flow of gas in this portion of the cylinder downwardly. The cleaner gas near the axis of the cylinder passes up through the space batween cylinders 11 and 12 into the plenum 72 defined by cap 20. The gas next passes between cylinders 12 and 13, following the helical path defined by partition 26. The area of the channel is less here, so the gas volocity is greater, and partition 26 adds a further vortical component to that already p~ssessed by the gas, so that remaining particles, mostly of smaller mass, are again urged to the wall of the cylinder, this time of cylinder 12, and drop 1~;03SS
therefrom into chamber 36. The cleaned gas passes through opening 24 and out at tube 13, it still may have considerable vortical energy but this is without significance.
The inner walls of cylinders 10 and 12 are two of the principal areas for collecting particulate matter, but some does come to the inner wall of cylinder 11. ~hen this occurs, and as it develops sufficient mass in the contaminant swirl, it will drop from the open end 17, and be carried vortically to cylinder 10 .
A feature of the invention which is of considerable importance relates to the known fact that when a stream of gas approaches a structure such as partition 26, there is produced not only a vortex down stream from the partition, but a "fore"
or "feedback" vortex upstream of the partition. The angular relation, about the axis of the cylinder, between the leading edge 73 of partition 26 and the point of tangency 74 of plenum 14 is carefully chosen so that the "feedback" vortex does not oppose or enturbulate the input vortex, but rather augments it.
In one form of the invent~on it was found that the former ~0 should be advanced by 360 from the latter, but it will be understood that different dimensions of the cylinders, or a different flow rate through the apparatus, may dictate some other angular relation.
It should also be pointed out that the presence of plenum 72 is important to optimum operation of the apparatus:
the plenum must be at least sufficiently large to prevent significant turbulance from interfering with the air flow from cylinder 10 to partition 26.
From the foregoing it will be evident that the inventive contribution disclosed here is an improved two stage centrifugal apparatus for separating gas and particulate matter, the improvement residing in part in the provision of a plenum between the stages, in part in position-ing a vortex enhancing element in the second stage in a proper angular relationship, about the axis of the apparatus, relative to the vortex inducing portion of the first stage, and in part in providing means minimizing the maintainance of the apparatus by automatically discharging particulate matter gathered during each operation of the apparatus.
Numerous objects and advantages of our invention have been set forth in the foregoing description, together with details of the structure and function o the invention, and the novel features thereof are pointed out in the appended claims. The disclosure, however, is illustrative only, and changes may be made in detail especially in matters of shape, size, and arrangement of parts,within the principle of the invention, to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
~0
Claims (2)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Apparatus for removing particulate matter from a gas on which it is borne comprising, in combination:
a first cylinder having a vertical axis, a lower end, and a closed upper end;
a second, concentric cylinder having a closed upper end and an open end projecting downward partially into the first cylinder;
a third, concentric cylinder having a lower end and an open end projecting upward partially into the open end of the second cylinder;
a fourth, concentric cylinder having an open end projecting downward partially into the open end of said third cylinder and an open end projecting through the top of said second cylinder to comprise the gas outlet for the apparatus;
input means for admitting gas bearing particulate matter tangentially into the first cylinder to cause vortical gas movement in the first cylinder;
a helical partition extending downwardly in the space between said third and fourth cylinders, the down-ward direction of the helix being the same as the direction of the vortex in the first cylinder, said helical partition being angularly positioned, about said axis, relative to the location of said longitudinal input, for maximum conservation of vortical momentum of the gas;
and means at the lower ends of the first and third cylinders for gravitationally receiving particulate matter centrifugally driven to the inner walls of the cylinders.
a first cylinder having a vertical axis, a lower end, and a closed upper end;
a second, concentric cylinder having a closed upper end and an open end projecting downward partially into the first cylinder;
a third, concentric cylinder having a lower end and an open end projecting upward partially into the open end of the second cylinder;
a fourth, concentric cylinder having an open end projecting downward partially into the open end of said third cylinder and an open end projecting through the top of said second cylinder to comprise the gas outlet for the apparatus;
input means for admitting gas bearing particulate matter tangentially into the first cylinder to cause vortical gas movement in the first cylinder;
a helical partition extending downwardly in the space between said third and fourth cylinders, the down-ward direction of the helix being the same as the direction of the vortex in the first cylinder, said helical partition being angularly positioned, about said axis, relative to the location of said longitudinal input, for maximum conservation of vortical momentum of the gas;
and means at the lower ends of the first and third cylinders for gravitationally receiving particulate matter centrifugally driven to the inner walls of the cylinders.
2. Apparatus according to claim 1 in which the helical partition is angularly positioned so that the feedback vortex therefrom reinforces the vortex emerging from the first cylinder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47122374A | 1974-05-20 | 1974-05-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1060355A true CA1060355A (en) | 1979-08-14 |
Family
ID=23870760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA226,631A Expired CA1060355A (en) | 1974-05-20 | 1975-05-09 | Integral two-stage separator |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5537301B2 (en) |
| BR (1) | BR7503028A (en) |
| CA (1) | CA1060355A (en) |
| DE (1) | DE2521801C2 (en) |
| FR (1) | FR2271875B1 (en) |
| GB (1) | GB1505166A (en) |
| ZA (1) | ZA753237B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7291190B2 (en) | 2002-02-16 | 2007-11-06 | Dyson Technology Limited | Cyclonic separating apparatus |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3638327C1 (en) * | 1986-11-10 | 1987-10-01 | Fooke Gmbh | Device for sucking out and separating dust or the like from fluids |
| DE4240048C2 (en) * | 1992-11-28 | 2002-11-07 | Mahle Filtersysteme Gmbh | Dust discharge valve |
| US5435442A (en) * | 1993-02-05 | 1995-07-25 | Carl A. Dengel | Dry fluid substance loading device |
| GB2404888B8 (en) * | 2000-07-06 | 2005-07-11 | John Herbert North | Improved air/particle separator |
| EP1299023B1 (en) | 2000-07-06 | 2004-11-10 | John Herbert North | Improved dust/particle collecting arrangement for cyclone separators |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2569710A (en) * | 1948-05-29 | 1951-10-02 | Stephen L Fitzpatrick | Fly ash precipitator |
| US2565596A (en) * | 1949-12-20 | 1951-08-28 | Kirk & Blum Mfg Company | Air cleaner |
| US3150943A (en) * | 1960-10-27 | 1964-09-29 | Gen Electric | Cyclone-type dust collector |
| FR1295617A (en) * | 1961-05-09 | 1962-06-08 | Improvements to devices for purifying fluids loaded with solid particles |
-
1975
- 1975-05-09 CA CA226,631A patent/CA1060355A/en not_active Expired
- 1975-05-16 BR BR3860/75A patent/BR7503028A/en unknown
- 1975-05-16 DE DE2521801A patent/DE2521801C2/en not_active Expired
- 1975-05-16 FR FR7515392A patent/FR2271875B1/fr not_active Expired
- 1975-05-20 JP JP5936475A patent/JPS5537301B2/ja not_active Expired
- 1975-05-20 GB GB21638/75A patent/GB1505166A/en not_active Expired
- 1975-05-20 ZA ZA00753237A patent/ZA753237B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7291190B2 (en) | 2002-02-16 | 2007-11-06 | Dyson Technology Limited | Cyclonic separating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2521801C2 (en) | 1983-12-01 |
| JPS50160876A (en) | 1975-12-26 |
| AU8132475A (en) | 1976-11-25 |
| ZA753237B (en) | 1976-04-28 |
| DE2521801A1 (en) | 1975-12-04 |
| FR2271875A1 (en) | 1975-12-19 |
| GB1505166A (en) | 1978-03-30 |
| FR2271875B1 (en) | 1979-01-19 |
| BR7503028A (en) | 1976-04-20 |
| JPS5537301B2 (en) | 1980-09-26 |
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