CA1087999A - Dust separator apparatus with a noise attenuation device - Google Patents
Dust separator apparatus with a noise attenuation deviceInfo
- Publication number
- CA1087999A CA1087999A CA272,043A CA272043A CA1087999A CA 1087999 A CA1087999 A CA 1087999A CA 272043 A CA272043 A CA 272043A CA 1087999 A CA1087999 A CA 1087999A
- Authority
- CA
- Canada
- Prior art keywords
- dirty gas
- disposed
- row
- spaced
- projections
- 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
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/06—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separating Particles In Gases By Inertia (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A dust separator apparatus having a housing defining a converging dirty gas passage with a dirty gas inlet at one end and a particulate matter outlet at the other end. One wall of the housing is louvred to effect particulate matter separa-tion from a dirty gas stream flowing through the dirty gas pas-sage. A plurality of projections extend into the converging dirty gas passage to create turbulent flow in the dirty gas stream flowing through the converging dirty gas passage and attenuating noise created by the gas stream.
A dust separator apparatus having a housing defining a converging dirty gas passage with a dirty gas inlet at one end and a particulate matter outlet at the other end. One wall of the housing is louvred to effect particulate matter separa-tion from a dirty gas stream flowing through the dirty gas pas-sage. A plurality of projections extend into the converging dirty gas passage to create turbulent flow in the dirty gas stream flowing through the converging dirty gas passage and attenuating noise created by the gas stream.
Description
~ 7~9~
The present invention relates to a dust separator apparatus with a noise attenuation device.
Further, the present invention relates to apparatus for separating particulates from a gas stream having a separated gas outflow control with means for disturbing the flow of in-coming dirty gas so as to attenuate noise created by the gas stream. More particularly, dust separating apparatus of the louvre-type wherein dust is separated from the dirty gas stream th~ough louvres disposed to abruptly change the direction of flow of the dirty gas stream and having means for creating a turbulent flow in the stream of dirty gas upstream of the louvres and attenuating noise created by the gas stream.
Various louvre-type dust separating devices are gen-erally known, and a particular louvre-type dust separator which functions particularly well is disclosed in U.S. Patent 3,155,474, issued on ~ovember 3, 1974 to R.W. Sexton. This separator is comprised of a casing having a dirty gas inlet at one end, a particulate matter outlet at the other end, and converging lou-vred side walls which converge toward each other in a direction from the dirty gas inlet toward the particulate matter outlet.
In addition, the separator has a partition intermediate the louvred side walls to divide the casing into two adjacent con-verging dirty gas stream passages.
While this separator functions particularly well for separating particulate matter from a gas stream, a noise is generated at some gas flow rates by the gas flowing through the louvred side walls. Under some conditions, this noise may be objectionable although it is not harmful.
One application for this louvre-type dust separator is for the air intakes of Diesel motors used in railroad engines. -Typically, railroad engines are rarely turned off even while the railroad engine is inactively sitting in a railroad yard, r ~,~
.
.. . . . .
Y99~ ~
~. .
but the motor throttle is set at an idle position. Under some conditions, a noise is generated by the air passing through the louvred walls of the dust separator which can be heard over the sound of the idling Diesel motor by persons near the railroad engine.
The present invention recognizes the problem of noise generation in louvre-type dust separators and provides a solu- .
tion which is straightforward and economical, requires virtually : : ~
no maintenance and which does not adversely effect the separation .~-efficiency of the dust separatorO ~;~
More particularly, the present invention provides an apparatus for separating particulate matter from a gas stream, comprising: a housing defining at least one converging dirty ~ -gas passageway with a dirty gas inlet at the other end, louvres formed in at least one wall of the housing defining the passage-way; and means for creating turbulence in the dirty gas stream as it flows in the converging dirty gas passageway to attenuate noise generated by the dirty gas stream.
Several advantageous embodiments of the present invention are illustrated in the accompanying drawings, wherein like numerals refer to like parts throughout the several views, and in which:
Figure 1 is a partially broken away isometric view illustrating one embodiment of the present invention installed in an apparatus for separating particulate matter from a gas stream, Figure 2 is a cross-sectional view taken in the direction of arrows 2-2 in Figure 1, Figure 3 is an isometric view of another advantageous embodiment of the present inventlon, Figure 4 is a cross-sectional view taken in the ~1!379~9 direction of arrows ~-4 in Figure 3, Figure 5 is an isometric view of another advantageous : embodiment of the present invention, Figure 6 is a cross-sectional view taken in the direction of arrows 6-6 in Figure 5, Figure 7 is an isometric view of another advan-tageous embodiment of the present inven-tion, :
Figure 8 is an isometric view illustrating another advantageous embodiment of the present invention installed in an apparatus for separating particulate matter from an air stream, ~.
Figure 9 is a cross-sectional view taken in the direction of arrows 9-9 in Figure 8;
Figure 10 is an isometric:.view of another advan- ;
tageous embodiment of the present inven-tion;
Figure 11 is a cross-sectional view taken in the direction of arrows 11-11 in Figure 10, Figure 12 is an isometric view of another advan-tageous embodiment of the present in-vention' Figure 13 is a cross-sectional view taken in the direction of arrows 13 - 13 in Figure 12, Figure 14 is an isometric view of another advan-tageous embodiment of the present invention;
Figure 15 is a cross-sectional view taken in the direction of arrows 15 - 15 in Figure 14, Figure 16 is an isometric view of another advan-tageous embodiment of the present invention, ' , ~ 3,9 Figure 17 is an isometric view of another advanta-yeous embodiment of the present inven-tion, .
Figure 18 is an isometric view of another advan-tageous embodiment of the present in-vention, Figure 19 is a cross-sectional view taken in the direction of arrows 19-19 in Fig-ure 18, Figure 20 is an isometric view of another advan- `~
tageous embodiment of the present in-vention, Figure 21 is a partially broken away isometric view illustrating another advantageous - embodiment of the present invention installed in an apparatus for separat-ing particulate matter from a gas ~ .
stream, Figure 22 is a cross-sectional view taken in the direction of arrows 22-22 in Figure 21;
Figure 23 is an isometric view of another advanta-geous embodiment of the present inven-tion, Figure 24 is a cross-sectional view taken in the direction of arrows 24-24 in Figure 23, Figure 25 is an isometric view of yet another advantageous embodiment of the present invention;
Figure 26 is a cross-sectional view taken in the direction of arrows 26-26 in Figure 25, and, Figure 27 is an isometric view of the advantageous :
79~9 embodiment of Figures 25 and 26 installed on a wall of an apparatus for separating particulate matter from a gas stream.
Referring to Figures 1 and 2, there is shown appara- ~
tus 10 for separating particulate matter from a gas. Apparatus :.
of this general type are well known in the art and comprise a casing having spaced end walls 14 and spaced converging side -walls 16 and 18 defining a converging dirty air passageway 20.
The upstream edges of the four adjoining walls 14, 16 and 18 define the perimeter of a dirty gas inlet 22 and the downstream edges define the perimeter of a particulate matter outlet 24. . -It is to be noted that the side walls 16 and 18 converge toward each other in the direction of the particulate outlet 24, thus, forming a diminishing flow area for the gases and solids passing therethrough. The side wall 18 further comprises spaced louvres 26 which longitudinally extend transverse to the direction of gas flow from the dirty gas inlet 22. These spaced louvres 26 define a clean gas outlet 28 between each adjacent louvre. As .
can be best seen in Figure 2, each of the louvres is inclined to the plane of the wall 18 in a direction generally counter the :.
flow of incoming dirty gas through the dirty gas inlet 22. This orientation of the louvres 26 produces an abrupt change in the direction of the dirty gas stream flowing in the passageway 20, thus, centrifugalizing the particulate matter from the gas ..
stream.
The wa~1 16 comprises means, generally denoted as the numeral 30, for creating a turbulence in the dirty gas stream.
With continued reference to Figures 1 and 2, the turbulent creating means 30 comprises a plurality of spaced apart projections 32 disposed in a row transverse to the air stream and extending in a row at an obtuse angle into the dirty gas 9~t9 stream from a location proximate the upstream edge of the wall 16.
Another advantageous embo~iment of the turbulent flow creating means 30 is shown in Figures 3 and 4 as comprises a plurality of spaced apart projections 132 disposed in a row transverse to the dirty gas stream and extending at an obtuse angle into the dirty gas stream from a location between the upstream edge and the downstream edge of the wall 16.
Turning to Figures 5 and 6 which show another embodiment of the turbulent flow creating means 30 comprising the row of spaced apart projections 32 and the row of spaced apart projections 132 disposed in spaced parallel relationship.
Figure 7 illustrates the turbulent flow creating means 30 as comprising a plurality of spaced apart projections 232 extending at an obtuse angle into the dirty gas stream from various locations over the entire planar face of the wall 16.
Figures 8 and 9 illustrate the apparatus 10 having turbulent flow creating means 30 comprisiny a plurality of spaced apart projections 332 disposed in a row transverse to the air stream and extending at an acute angle into the dirty gas stream from a location proximate the upstream edge of the wall 16.
Figures 10 and 11 illustrate another advantageous embodiment of the turbulent flow creating means 30 as comprising a plurality of spaced apart projections 432 disposed in a row transverse to the air stream and extending at an acute angle to the dirty gas stream from a location between the upstream edge and the downstream edge of the wall 16.
Figures 12 and 13 illustrate the turbulent flow creating means 30 as comprising the row of spaced apart projec-tions 332 and the row of spaced apart projections 432 disposed in spaced parallel relationship.
Figures 14 and 15 show the turbulent flow creating means 30 as comprising a pIurality of spaced projections 532 ' ' . . ,':-.- . , . . , , . :':' ~ 9 disposed in a row transverse to the dirty gas stream and extend-ing at a right angle to the planar face of the wall 16 into the dirty gas stream from a location proximate the upstream edge of the wall 16.
Figure 16 illustrates the turbulent flow creating means 30 as comprising a plurality of spaced apart projections 632 disp.osed in a row transverse to the dirty gas stream and each extending at a right angle to the planar face of the wall 16 into the dirty gas stream from a location between the upstream and downstream edges of the wall 16.
Figure 17 illustrates the turbulent flow creating means 30 as comprising both the row of spaced apart projections 532 and the row of spaced apart projections 632 in spaced paral-lel relationship.
Turning now to Figures 18 and 19, there is shown another advantageous embodiment of the turbulent flow creating means comprising a row of spaced apart projections 732. In this embodiment the planar surface of each projection 732 is trans-versely inclined or tilted relative to the direction of flow of dirty gas as well as projecting longitudinally into the dirty gas stream at a predetermined angle to the planar surface of the wall 16.
Figure 20 illustrates a further advantageous embodi-ment of the turbulent flow creating means 30 which comprises a row of spaced apart projections 832. In this embodiment, each projection 832 is twisted through a predetermined angle about its longitudinal axis as well as projecting into the dirty gas stream at a predetermined angle to the planar surface of the wall 16.
Referring to Figures 21 and 22, there is shown another known form of an apparatus 110 for separating particulate matter from a gas. Again, apparatus of this type are generally known in the art and comprise a casing having spaced end walls 11~, spaced converging side walls 115 and 118 and a partition wall 116 positioned generally centrally between the converging side walls 115, 118 and cooperating therewith to define two juxtaposed con-verging dirty gas passageways 120 and 121. The upstream edges of the four walls 114, 115 and 118, and the upstream edge of the partition wall 116 define the perimeter of the dirty gas inlets 122 and 123 of the passageways 120 and 121, respectively. The downstream edges of the four walls 114, 115 and 118, and the downstream edge of the partition wall 116 define the perimeter of the particulate matter outlet 124 and 125 of the passageways 120 and 121, respectively. The side wall 115 and 118 converge toward each other in.the direction of t~e particulate matter outlets 124 and 125, thus, forming a diminishing flow area for the gases and solids passing through the passageways 120 and 121. The side walls 115 and 118 further comprise spaced louvres 126 which longitudinally extend transverse to the direction of gas flow from the dirty inlets 122, 123. These spaced louvres 126 define clean gas outlets 128 between adjacent louvres. As can be best seen in Figure 22, each of the louvres 126 is in-clined to the plane of its respective wall 115 and 118 in a direction generally counter the flow of incoming dirty gas through the dirty gas inlets. This orientation of the louvres 126 pxoduces an abrupt change in the direction of the dirty gas stream flowing in~the dirty gas passageways 120, 121, thus ; centrifugalizing particulate matter from the gas stream.
The partition wall 116 includes turbulent flow creating means 30 comprising a plurality of spaced apart pro-jections 932 disposed in a row transverse to the air stream.
and extending at an acute angle into the dirty air stream enter-ing each passageway 120 and 121 from a location proximate the .
upstream edge of the partition wall 116. As a manufacturing 37~9 expedient, it will be noted that alternating projections extend -into one passageway and the other projections extend into the other passageway.
Figures 23 and 24 illustrate another advantageous embodiment of the turbulent flow creating means 30 which com-prises the row of spaced apart projections 932 and another row of projections 1032 disposed parallel to the row of projections 932 and transversely to the dirty gas stream and extending at an acute angle into the gas stream from a location between the upstream edge and downstream edge of the partition wall 116.
Again, as a manufacturing expedient alternating projections ex-tend into one passageway and the other projections extend into the other passageway.
It should be clearly understood at this point that any of the embodiments of the turbulent flow creating means :
illustrated in Figures 1 through 7 and 10 through 20 can be used with the apparatus 110 which has two dirty gas passages just as advantageously as with the apparatus 10 which has one dirty gas passageway.
One means for forming the above-discussed projections in the wall 16 and 116 proximate the upstream edge thereof is to cut a plurality of parallel spaced apart slits open at one end to the upstream edge of the wall and extending a predeter-mined length therefrom thereby forming a plurality of tongues between the slits. In the apparatus 10 comprising one dirty gas `
passageway alternating tongues are bent at a desired angle to the wall 16 to project into the dirty gas passageway. In the apparatus 110 comprising two dirty gas passageways, alternating tongues ar~ bent at a predetermined angle to project into one passageway and the other tongues are bent at a predetermined angle to project into the other passageway. The slits can be : conveniently cut into the wall 16 and 116 by any conventional means such as a saw or die.
_ g _ : ~
~, .
: -- : . . - :
.. , ~L0~37999 The above~discussed advantageous embodiments of the turbulent creating means 30 are conveniently formed in the wall 16 and 116 during the manufacture oE an apparatus 10 or 110. However, the previously discussed turbulent flow creating means 30 may not be so conveniently formed in already fabricated apparatus 10 and 110.
Figures 25, 26, and 27 illustrate one advantageous embodiment of the turbulent flow creating means 30 which can be conveniently installed in the apparatus 10 or 110 in the field without having to remove the apparatus from an installation.
The turbulent flow creating means 30 of Figures 25 - 27 is an add-on device and comprises a generally U-shaped mounting body :
34 and a plurality of projections 35 formed in and disposed at a predetermined angle to each leg 36 of-the mounting body 34.
Therefore, when this embodiment is installed in an apparatus 10 or 110, the projections will extend at a predetermined angle into the dirty gas passageways. As can best be seen in Figure 27, this embodiment is installed on the upstream edge of the wall 16 or 116 of the apparatus 10 or 110, respectively. To install this embodiment, the channel 38 defined between the legs 36 is placed in registration with the upstream edge of the wall 16, 116 and then displaced so that the upstream edge is received therein. Any convention means can be used to secure this em-bodiment to the wall 16, 116. For example, it can be screwed, riveted or welded in place. One convenient means which has been found is to stake the U-shaped mounting body 34 to the wall 16. This involves using a sharp tool to cut small tabs 40 in the legs 36 and displacing the tabs 40 inwardly of the wall so that the tabs 40 cut into the wall 16 and thereby tight-ly grip it.
~ oise is generated in the dust separation apparatusat various volume rate oE gas flow therethrough. This noise may .. .. . . .. . .. . . .. ..
7~9~
be caused by the louvres vibrating, it may be caused by vibrations created in the air stream itself, or the noise may be caused by a combination o~ louvre vibration and air stream vibration. What-ever the cause of the noise, it has been found in practice that the present invention eliminates the noise generation or greatly reduces the sound pressure levels.
It is theori~ed that the present invention functions as a gas stream spoiler by creating a turbulent gas stream ~low thereby inhibiting the gas stream columns, formed in the gas 10~ stream as it passes through the gas outlets formed between ad-jacent louvres, from vibrating.
The ~oregoing detailed description is given prim-arily for clarity of understanding and no unnecessary limitations should be understood therefrom for modifications will become obvious to those skilled in the art upon reading this disclosure and may be made without departing ~rom the spirit o~ the inven- .
tion or the scope of the appended claims.
..
.
The present invention relates to a dust separator apparatus with a noise attenuation device.
Further, the present invention relates to apparatus for separating particulates from a gas stream having a separated gas outflow control with means for disturbing the flow of in-coming dirty gas so as to attenuate noise created by the gas stream. More particularly, dust separating apparatus of the louvre-type wherein dust is separated from the dirty gas stream th~ough louvres disposed to abruptly change the direction of flow of the dirty gas stream and having means for creating a turbulent flow in the stream of dirty gas upstream of the louvres and attenuating noise created by the gas stream.
Various louvre-type dust separating devices are gen-erally known, and a particular louvre-type dust separator which functions particularly well is disclosed in U.S. Patent 3,155,474, issued on ~ovember 3, 1974 to R.W. Sexton. This separator is comprised of a casing having a dirty gas inlet at one end, a particulate matter outlet at the other end, and converging lou-vred side walls which converge toward each other in a direction from the dirty gas inlet toward the particulate matter outlet.
In addition, the separator has a partition intermediate the louvred side walls to divide the casing into two adjacent con-verging dirty gas stream passages.
While this separator functions particularly well for separating particulate matter from a gas stream, a noise is generated at some gas flow rates by the gas flowing through the louvred side walls. Under some conditions, this noise may be objectionable although it is not harmful.
One application for this louvre-type dust separator is for the air intakes of Diesel motors used in railroad engines. -Typically, railroad engines are rarely turned off even while the railroad engine is inactively sitting in a railroad yard, r ~,~
.
.. . . . .
Y99~ ~
~. .
but the motor throttle is set at an idle position. Under some conditions, a noise is generated by the air passing through the louvred walls of the dust separator which can be heard over the sound of the idling Diesel motor by persons near the railroad engine.
The present invention recognizes the problem of noise generation in louvre-type dust separators and provides a solu- .
tion which is straightforward and economical, requires virtually : : ~
no maintenance and which does not adversely effect the separation .~-efficiency of the dust separatorO ~;~
More particularly, the present invention provides an apparatus for separating particulate matter from a gas stream, comprising: a housing defining at least one converging dirty ~ -gas passageway with a dirty gas inlet at the other end, louvres formed in at least one wall of the housing defining the passage-way; and means for creating turbulence in the dirty gas stream as it flows in the converging dirty gas passageway to attenuate noise generated by the dirty gas stream.
Several advantageous embodiments of the present invention are illustrated in the accompanying drawings, wherein like numerals refer to like parts throughout the several views, and in which:
Figure 1 is a partially broken away isometric view illustrating one embodiment of the present invention installed in an apparatus for separating particulate matter from a gas stream, Figure 2 is a cross-sectional view taken in the direction of arrows 2-2 in Figure 1, Figure 3 is an isometric view of another advantageous embodiment of the present inventlon, Figure 4 is a cross-sectional view taken in the ~1!379~9 direction of arrows ~-4 in Figure 3, Figure 5 is an isometric view of another advantageous : embodiment of the present invention, Figure 6 is a cross-sectional view taken in the direction of arrows 6-6 in Figure 5, Figure 7 is an isometric view of another advan-tageous embodiment of the present inven-tion, :
Figure 8 is an isometric view illustrating another advantageous embodiment of the present invention installed in an apparatus for separating particulate matter from an air stream, ~.
Figure 9 is a cross-sectional view taken in the direction of arrows 9-9 in Figure 8;
Figure 10 is an isometric:.view of another advan- ;
tageous embodiment of the present inven-tion;
Figure 11 is a cross-sectional view taken in the direction of arrows 11-11 in Figure 10, Figure 12 is an isometric view of another advan-tageous embodiment of the present in-vention' Figure 13 is a cross-sectional view taken in the direction of arrows 13 - 13 in Figure 12, Figure 14 is an isometric view of another advan-tageous embodiment of the present invention;
Figure 15 is a cross-sectional view taken in the direction of arrows 15 - 15 in Figure 14, Figure 16 is an isometric view of another advan-tageous embodiment of the present invention, ' , ~ 3,9 Figure 17 is an isometric view of another advanta-yeous embodiment of the present inven-tion, .
Figure 18 is an isometric view of another advan-tageous embodiment of the present in-vention, Figure 19 is a cross-sectional view taken in the direction of arrows 19-19 in Fig-ure 18, Figure 20 is an isometric view of another advan- `~
tageous embodiment of the present in-vention, Figure 21 is a partially broken away isometric view illustrating another advantageous - embodiment of the present invention installed in an apparatus for separat-ing particulate matter from a gas ~ .
stream, Figure 22 is a cross-sectional view taken in the direction of arrows 22-22 in Figure 21;
Figure 23 is an isometric view of another advanta-geous embodiment of the present inven-tion, Figure 24 is a cross-sectional view taken in the direction of arrows 24-24 in Figure 23, Figure 25 is an isometric view of yet another advantageous embodiment of the present invention;
Figure 26 is a cross-sectional view taken in the direction of arrows 26-26 in Figure 25, and, Figure 27 is an isometric view of the advantageous :
79~9 embodiment of Figures 25 and 26 installed on a wall of an apparatus for separating particulate matter from a gas stream.
Referring to Figures 1 and 2, there is shown appara- ~
tus 10 for separating particulate matter from a gas. Apparatus :.
of this general type are well known in the art and comprise a casing having spaced end walls 14 and spaced converging side -walls 16 and 18 defining a converging dirty air passageway 20.
The upstream edges of the four adjoining walls 14, 16 and 18 define the perimeter of a dirty gas inlet 22 and the downstream edges define the perimeter of a particulate matter outlet 24. . -It is to be noted that the side walls 16 and 18 converge toward each other in the direction of the particulate outlet 24, thus, forming a diminishing flow area for the gases and solids passing therethrough. The side wall 18 further comprises spaced louvres 26 which longitudinally extend transverse to the direction of gas flow from the dirty gas inlet 22. These spaced louvres 26 define a clean gas outlet 28 between each adjacent louvre. As .
can be best seen in Figure 2, each of the louvres is inclined to the plane of the wall 18 in a direction generally counter the :.
flow of incoming dirty gas through the dirty gas inlet 22. This orientation of the louvres 26 produces an abrupt change in the direction of the dirty gas stream flowing in the passageway 20, thus, centrifugalizing the particulate matter from the gas ..
stream.
The wa~1 16 comprises means, generally denoted as the numeral 30, for creating a turbulence in the dirty gas stream.
With continued reference to Figures 1 and 2, the turbulent creating means 30 comprises a plurality of spaced apart projections 32 disposed in a row transverse to the air stream and extending in a row at an obtuse angle into the dirty gas 9~t9 stream from a location proximate the upstream edge of the wall 16.
Another advantageous embo~iment of the turbulent flow creating means 30 is shown in Figures 3 and 4 as comprises a plurality of spaced apart projections 132 disposed in a row transverse to the dirty gas stream and extending at an obtuse angle into the dirty gas stream from a location between the upstream edge and the downstream edge of the wall 16.
Turning to Figures 5 and 6 which show another embodiment of the turbulent flow creating means 30 comprising the row of spaced apart projections 32 and the row of spaced apart projections 132 disposed in spaced parallel relationship.
Figure 7 illustrates the turbulent flow creating means 30 as comprising a plurality of spaced apart projections 232 extending at an obtuse angle into the dirty gas stream from various locations over the entire planar face of the wall 16.
Figures 8 and 9 illustrate the apparatus 10 having turbulent flow creating means 30 comprisiny a plurality of spaced apart projections 332 disposed in a row transverse to the air stream and extending at an acute angle into the dirty gas stream from a location proximate the upstream edge of the wall 16.
Figures 10 and 11 illustrate another advantageous embodiment of the turbulent flow creating means 30 as comprising a plurality of spaced apart projections 432 disposed in a row transverse to the air stream and extending at an acute angle to the dirty gas stream from a location between the upstream edge and the downstream edge of the wall 16.
Figures 12 and 13 illustrate the turbulent flow creating means 30 as comprising the row of spaced apart projec-tions 332 and the row of spaced apart projections 432 disposed in spaced parallel relationship.
Figures 14 and 15 show the turbulent flow creating means 30 as comprising a pIurality of spaced projections 532 ' ' . . ,':-.- . , . . , , . :':' ~ 9 disposed in a row transverse to the dirty gas stream and extend-ing at a right angle to the planar face of the wall 16 into the dirty gas stream from a location proximate the upstream edge of the wall 16.
Figure 16 illustrates the turbulent flow creating means 30 as comprising a plurality of spaced apart projections 632 disp.osed in a row transverse to the dirty gas stream and each extending at a right angle to the planar face of the wall 16 into the dirty gas stream from a location between the upstream and downstream edges of the wall 16.
Figure 17 illustrates the turbulent flow creating means 30 as comprising both the row of spaced apart projections 532 and the row of spaced apart projections 632 in spaced paral-lel relationship.
Turning now to Figures 18 and 19, there is shown another advantageous embodiment of the turbulent flow creating means comprising a row of spaced apart projections 732. In this embodiment the planar surface of each projection 732 is trans-versely inclined or tilted relative to the direction of flow of dirty gas as well as projecting longitudinally into the dirty gas stream at a predetermined angle to the planar surface of the wall 16.
Figure 20 illustrates a further advantageous embodi-ment of the turbulent flow creating means 30 which comprises a row of spaced apart projections 832. In this embodiment, each projection 832 is twisted through a predetermined angle about its longitudinal axis as well as projecting into the dirty gas stream at a predetermined angle to the planar surface of the wall 16.
Referring to Figures 21 and 22, there is shown another known form of an apparatus 110 for separating particulate matter from a gas. Again, apparatus of this type are generally known in the art and comprise a casing having spaced end walls 11~, spaced converging side walls 115 and 118 and a partition wall 116 positioned generally centrally between the converging side walls 115, 118 and cooperating therewith to define two juxtaposed con-verging dirty gas passageways 120 and 121. The upstream edges of the four walls 114, 115 and 118, and the upstream edge of the partition wall 116 define the perimeter of the dirty gas inlets 122 and 123 of the passageways 120 and 121, respectively. The downstream edges of the four walls 114, 115 and 118, and the downstream edge of the partition wall 116 define the perimeter of the particulate matter outlet 124 and 125 of the passageways 120 and 121, respectively. The side wall 115 and 118 converge toward each other in.the direction of t~e particulate matter outlets 124 and 125, thus, forming a diminishing flow area for the gases and solids passing through the passageways 120 and 121. The side walls 115 and 118 further comprise spaced louvres 126 which longitudinally extend transverse to the direction of gas flow from the dirty inlets 122, 123. These spaced louvres 126 define clean gas outlets 128 between adjacent louvres. As can be best seen in Figure 22, each of the louvres 126 is in-clined to the plane of its respective wall 115 and 118 in a direction generally counter the flow of incoming dirty gas through the dirty gas inlets. This orientation of the louvres 126 pxoduces an abrupt change in the direction of the dirty gas stream flowing in~the dirty gas passageways 120, 121, thus ; centrifugalizing particulate matter from the gas stream.
The partition wall 116 includes turbulent flow creating means 30 comprising a plurality of spaced apart pro-jections 932 disposed in a row transverse to the air stream.
and extending at an acute angle into the dirty air stream enter-ing each passageway 120 and 121 from a location proximate the .
upstream edge of the partition wall 116. As a manufacturing 37~9 expedient, it will be noted that alternating projections extend -into one passageway and the other projections extend into the other passageway.
Figures 23 and 24 illustrate another advantageous embodiment of the turbulent flow creating means 30 which com-prises the row of spaced apart projections 932 and another row of projections 1032 disposed parallel to the row of projections 932 and transversely to the dirty gas stream and extending at an acute angle into the gas stream from a location between the upstream edge and downstream edge of the partition wall 116.
Again, as a manufacturing expedient alternating projections ex-tend into one passageway and the other projections extend into the other passageway.
It should be clearly understood at this point that any of the embodiments of the turbulent flow creating means :
illustrated in Figures 1 through 7 and 10 through 20 can be used with the apparatus 110 which has two dirty gas passages just as advantageously as with the apparatus 10 which has one dirty gas passageway.
One means for forming the above-discussed projections in the wall 16 and 116 proximate the upstream edge thereof is to cut a plurality of parallel spaced apart slits open at one end to the upstream edge of the wall and extending a predeter-mined length therefrom thereby forming a plurality of tongues between the slits. In the apparatus 10 comprising one dirty gas `
passageway alternating tongues are bent at a desired angle to the wall 16 to project into the dirty gas passageway. In the apparatus 110 comprising two dirty gas passageways, alternating tongues ar~ bent at a predetermined angle to project into one passageway and the other tongues are bent at a predetermined angle to project into the other passageway. The slits can be : conveniently cut into the wall 16 and 116 by any conventional means such as a saw or die.
_ g _ : ~
~, .
: -- : . . - :
.. , ~L0~37999 The above~discussed advantageous embodiments of the turbulent creating means 30 are conveniently formed in the wall 16 and 116 during the manufacture oE an apparatus 10 or 110. However, the previously discussed turbulent flow creating means 30 may not be so conveniently formed in already fabricated apparatus 10 and 110.
Figures 25, 26, and 27 illustrate one advantageous embodiment of the turbulent flow creating means 30 which can be conveniently installed in the apparatus 10 or 110 in the field without having to remove the apparatus from an installation.
The turbulent flow creating means 30 of Figures 25 - 27 is an add-on device and comprises a generally U-shaped mounting body :
34 and a plurality of projections 35 formed in and disposed at a predetermined angle to each leg 36 of-the mounting body 34.
Therefore, when this embodiment is installed in an apparatus 10 or 110, the projections will extend at a predetermined angle into the dirty gas passageways. As can best be seen in Figure 27, this embodiment is installed on the upstream edge of the wall 16 or 116 of the apparatus 10 or 110, respectively. To install this embodiment, the channel 38 defined between the legs 36 is placed in registration with the upstream edge of the wall 16, 116 and then displaced so that the upstream edge is received therein. Any convention means can be used to secure this em-bodiment to the wall 16, 116. For example, it can be screwed, riveted or welded in place. One convenient means which has been found is to stake the U-shaped mounting body 34 to the wall 16. This involves using a sharp tool to cut small tabs 40 in the legs 36 and displacing the tabs 40 inwardly of the wall so that the tabs 40 cut into the wall 16 and thereby tight-ly grip it.
~ oise is generated in the dust separation apparatusat various volume rate oE gas flow therethrough. This noise may .. .. . . .. . .. . . .. ..
7~9~
be caused by the louvres vibrating, it may be caused by vibrations created in the air stream itself, or the noise may be caused by a combination o~ louvre vibration and air stream vibration. What-ever the cause of the noise, it has been found in practice that the present invention eliminates the noise generation or greatly reduces the sound pressure levels.
It is theori~ed that the present invention functions as a gas stream spoiler by creating a turbulent gas stream ~low thereby inhibiting the gas stream columns, formed in the gas 10~ stream as it passes through the gas outlets formed between ad-jacent louvres, from vibrating.
The ~oregoing detailed description is given prim-arily for clarity of understanding and no unnecessary limitations should be understood therefrom for modifications will become obvious to those skilled in the art upon reading this disclosure and may be made without departing ~rom the spirit o~ the inven- .
tion or the scope of the appended claims.
..
.
Claims (27)
1. An apparatus for separating dust particles from a gas stream comprising:
a housing defining at least one converging dirty air passageway with a dirty gas inlet at one end and a particulate matter outlet at the opposite end;
louvres formed in at least one wall of the housing defining the passageway; and means for creating turbulence in the dirty gas stream as it flows in the converging dirty gas passageway including a plurality of projections extending into the passageway.
a housing defining at least one converging dirty air passageway with a dirty gas inlet at one end and a particulate matter outlet at the opposite end;
louvres formed in at least one wall of the housing defining the passageway; and means for creating turbulence in the dirty gas stream as it flows in the converging dirty gas passageway including a plurality of projections extending into the passageway.
2. The apparatus of claim 1, wherein said means for creating turbulence in the gas stream comprises:
a generally U-shaped mounting body adapted to receive the upstream edge of one wall of the housing in the channel defined between the legs of the U-shape;
the plurality of projections extending from one leg of the U-shaped body to project at a predetermined angle into the dirty gas inlet of the housing and means for attaching the U-shaped body to the housing wall.
a generally U-shaped mounting body adapted to receive the upstream edge of one wall of the housing in the channel defined between the legs of the U-shape;
the plurality of projections extending from one leg of the U-shaped body to project at a predetermined angle into the dirty gas inlet of the housing and means for attaching the U-shaped body to the housing wall.
3. The apparatus defined in claim 1, wherein the pro-jections extend into the converging air passage from the wall of the housing oppositely disposed to the louvred wall.
4. The apparatus defined in claim 1, wherein the louvred wall is disposed at an angle to the direction of the incoming dirty gas stream.
5. The apparatus defined in claim 3, wherein the pro-jections are disposed in a spaced array over the face of the wall opposite the louvred wall between the dirty gas inlet and particulate matter outlet.
6. The apparatus defined in claim 3, wherein the pro-jections are spaced apart in a row and the row is disposed transverse to the flow of dirty gas.
7. The apparatus defined in claim 6, wherein the row of spaced-apart projections is disposed proximate the dirty gas inlet.
8. The apparatus defined in claim 6, wherein the row of spaced-apart projections is disposed between the dirty gas inlet and particulate matter outlet.
9. The apparatus defined in claim 3, wherein the pro-jections are spaced apart from each other in two spaced-apart parallel rows, each row of spaced-apart projections is disposed transverse to the flow of dirty gas and one row of spaced-apart projections is disposed proximate the dirty gas inlet and the other row is disposed between the dirty gas inlet and particulate matter outlet.
10. The apparatus defined in claim 3, wherein the pro-jections are spaced apart from each other in a plurality of spaced-apart parallel rows each row of spaced-apart projec-tions is disposed transverse to the flow of dirty gas; and the parallel spaced-apart rows of spaced-apart projections are disposed between the dirty gas inlet and particulate matter outlet.
11. The apparatus defined in claim 1, wherein said pro-jections are disposed at an acute angle into the flow of the dirty gas stream.
12. The apparatus defined in claim 1, wherein said projections are disposed at an obtuse angle into the flow of the dirty gas stream.
13. An apparatus for separating dust particles from a gas stream comprising:
a housing comprising a generally centrally disposed partition thereby defining two juxtaposed converging dirty air passages, each passage having a dirty gas inlet at one end and a particulate matter outlet at the opposite end, louvres formed in the wall of each of the dirty gas passages opposite to the partition, and means for creating turbulence in the dirty gas stream flowing in each of the converging dirty gas passages including a plurality of finger-like projections extending into the gas passage.
a housing comprising a generally centrally disposed partition thereby defining two juxtaposed converging dirty air passages, each passage having a dirty gas inlet at one end and a particulate matter outlet at the opposite end, louvres formed in the wall of each of the dirty gas passages opposite to the partition, and means for creating turbulence in the dirty gas stream flowing in each of the converging dirty gas passages including a plurality of finger-like projections extending into the gas passage.
14. The apparatus defined in claim 13, wherein each louvred wall is inclined to the dirty gas stream.
15. The apparatus defined in claim 13, wherein the plurality of projections extending from each side of the partition are spaced apart in a row, and the row is disposed transverse to the flow of dirty gas.
16. The apparatus defined in claim 13, wherein the plurality of projections extending from each side of the partition are disposed in a spaced array over the face of the partition between the dirty gas inlet and particulate matter outlet.
17. The apparatus defined in claim 15, wherein said row of projections is disposed proximate the dirty gas inlet.
18. The apparatus defined in claim 17, wherein each row of projections is disposed between the dirty gas inlet and the particulate matter outlet.
19. The apparatus of claim 14, wherein the plurality of projections extending from each side of the partition form two parallel spaced-apart rows, each row is comprised of a plurality of spaced-apart projections, and each row is dsi-posed transversely to the flow of dirty gas.
20. The apparatus of claim 19, wherein one row of pro-jections extending from each side of the partition is dis-posed proximate the dirty gas inlet, and the other row of projections extending from each side of the partition is disposed between the dirty gas inlet and particulate matter outlet.
21. The apparatus of claim 19, wherein the plurality of projections extending from each side of the partition form a plurality of parallel spaced-apart rows, each row is com-prised of a plurality of spaced-apart projections, and each row is disposed transversely to the flow of dirty gas.
22. The apparatus of claim 13, wherein the projections are disposed at an arcuate angle into the dirty gas flow.
23. The apparatus of claim 13, wherein the projections are oriented at an obtuse angle into the dirty gas flow.
24. The apparatus of claim 13, wherein the projections are cut out of the partition.
25. The apparatus of claim 13, wherein each projection has a substantially flat surface, the flat surface is trans-versely inclined.
26. The apparatus of claim 13, wherein each projection is twisted about its longitudinal axis.
27. The apparatus of claim 13, wherein said means for creating turbulence in the gas stream comprises:
a generally U-shaped mounting body adapted to receive the upstream edge of the centrally disposed partition in the channel defined between the legs of the U-shape;
a plurality of projections extending from each leg of the U-shaped body to project into both dirty gas inlets of spaced-apart projections, and each row is disposed trans-versely to the flow of dirty gas.
a generally U-shaped mounting body adapted to receive the upstream edge of the centrally disposed partition in the channel defined between the legs of the U-shape;
a plurality of projections extending from each leg of the U-shaped body to project into both dirty gas inlets of spaced-apart projections, and each row is disposed trans-versely to the flow of dirty gas.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69673976A | 1976-06-16 | 1976-06-16 | |
| US696,739 | 1976-06-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1087999A true CA1087999A (en) | 1980-10-21 |
Family
ID=24798335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA272,043A Expired CA1087999A (en) | 1976-06-16 | 1977-02-15 | Dust separator apparatus with a noise attenuation device |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS52154186A (en) |
| CA (1) | CA1087999A (en) |
| DD (1) | DD130206A5 (en) |
| DE (1) | DE2720810A1 (en) |
| FR (1) | FR2354803A1 (en) |
| GB (1) | GB1574245A (en) |
| IT (1) | IT1077278B (en) |
| NL (1) | NL7703183A (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2182862A (en) * | 1934-04-10 | 1939-12-12 | Thomas B Allardice | Separating method and apparatus |
| FR1131792A (en) * | 1955-10-03 | 1957-02-27 | Linderoths Patenter Ab | Dust separator |
| US3155474A (en) * | 1959-11-16 | 1964-11-03 | American Air Filter Co | Dust separator |
-
1977
- 1977-02-15 CA CA272,043A patent/CA1087999A/en not_active Expired
- 1977-02-28 IT IT2075577A patent/IT1077278B/en active
- 1977-03-24 NL NL7703183A patent/NL7703183A/en not_active Application Discontinuation
- 1977-03-25 GB GB1270477A patent/GB1574245A/en not_active Expired
- 1977-04-15 FR FR7711448A patent/FR2354803A1/en not_active Withdrawn
- 1977-04-15 DD DD19842877A patent/DD130206A5/en unknown
- 1977-05-09 DE DE19772720810 patent/DE2720810A1/en not_active Withdrawn
- 1977-05-17 JP JP5698277A patent/JPS52154186A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2720810A1 (en) | 1977-12-29 |
| FR2354803A1 (en) | 1978-01-13 |
| JPS52154186A (en) | 1977-12-21 |
| GB1574245A (en) | 1980-09-03 |
| IT1077278B (en) | 1985-05-04 |
| NL7703183A (en) | 1977-12-20 |
| DD130206A5 (en) | 1978-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |