CA1080083A - Flow divider - Google Patents
Flow dividerInfo
- Publication number
- CA1080083A CA1080083A CA294,469A CA294469A CA1080083A CA 1080083 A CA1080083 A CA 1080083A CA 294469 A CA294469 A CA 294469A CA 1080083 A CA1080083 A CA 1080083A
- Authority
- CA
- Canada
- Prior art keywords
- tank
- flow divider
- liquid
- discharge passages
- flow
- 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
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- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
FLOW DIVIDER
ABSTRACT OF THE DISCLOSURE
A flow divider of the type here involved consists of a cylin-drical tank having a tangential inlet near the top and d plurality of tangential outlets near the bottom. The tangential inlet produces a swirling or cyclonic action but solid material entrained or sus-pended in the liquid does not remain uniformly distributed in the liquid and thus the several outlets do not contain uniform quantities of solid material. The present disclosure provides an annular inter-nal flange between the inlet and outlet passages which produces turbulence in the liquid adjacent to the wall of the tank which results in uniform solid material concentrations at the several out-
ABSTRACT OF THE DISCLOSURE
A flow divider of the type here involved consists of a cylin-drical tank having a tangential inlet near the top and d plurality of tangential outlets near the bottom. The tangential inlet produces a swirling or cyclonic action but solid material entrained or sus-pended in the liquid does not remain uniformly distributed in the liquid and thus the several outlets do not contain uniform quantities of solid material. The present disclosure provides an annular inter-nal flange between the inlet and outlet passages which produces turbulence in the liquid adjacent to the wall of the tank which results in uniform solid material concentrations at the several out-
Description
~8(~0~3 BACKGROUND OF T~E I~VEMTION
This inven-tion relates to a ~low divider and more particularly to apparatus for receiving liquid having solid material suspended or entrained therein and for discharging the liquid into plural passages for delivery from -the apparatus through a plurality of discharge passages.
An example of the field of use of the presen-t apparatus is in feeding liquid suspensionsor slurries to screening equipmen-t where it is desired to discharge the liquid material a-t several locations along a vibra-ting screen or on more than one screen or both. Con-ventional flow dividers, known in the ar-t as "splitters", comprise circular tanks wherein the liquid or slurry is introduced tangen-tially in the upper portion o~ the tank and undergoes a cyclonic mi~ing as it descends along the circular wall of the tank.
In such splitters the liquid level in the tank is above the tangential inlet passage so that the inlet flow -tends to blend into the body of liquid in the tank in a cyclonic mixing ac-tion. In this type of splitter or flow divider a number of tangential discharge passages are disposed in a common horizontal plane near the bottom of the tank or at least below the tangential inlet passage.
With convential splitters or flow dividers of the foregoing type, even though equal quantities o~ liquid discharge ~rom the several discharge passages, it appears that the first discharge pas-sage encountered by the swirling liquid suspension or slurry receives liquid containing the highest percen-tage of solid material while the last discharge passage in series receives liquid containing the least percentage of solid material.
This may be due -to a cen-trifugal separa-tion action which takes place during the cyclonic swirling of -the material between the inlet passage and the several discharge passages. Wha-tever the reason, in such apparatus I have found tha-t -the first discharge passage contains a greater quantity of solid material with the quan-tity of solid material diminishing progressively to -the last in the series of
This inven-tion relates to a ~low divider and more particularly to apparatus for receiving liquid having solid material suspended or entrained therein and for discharging the liquid into plural passages for delivery from -the apparatus through a plurality of discharge passages.
An example of the field of use of the presen-t apparatus is in feeding liquid suspensionsor slurries to screening equipmen-t where it is desired to discharge the liquid material a-t several locations along a vibra-ting screen or on more than one screen or both. Con-ventional flow dividers, known in the ar-t as "splitters", comprise circular tanks wherein the liquid or slurry is introduced tangen-tially in the upper portion o~ the tank and undergoes a cyclonic mi~ing as it descends along the circular wall of the tank.
In such splitters the liquid level in the tank is above the tangential inlet passage so that the inlet flow -tends to blend into the body of liquid in the tank in a cyclonic mixing ac-tion. In this type of splitter or flow divider a number of tangential discharge passages are disposed in a common horizontal plane near the bottom of the tank or at least below the tangential inlet passage.
With convential splitters or flow dividers of the foregoing type, even though equal quantities o~ liquid discharge ~rom the several discharge passages, it appears that the first discharge pas-sage encountered by the swirling liquid suspension or slurry receives liquid containing the highest percen-tage of solid material while the last discharge passage in series receives liquid containing the least percentage of solid material.
This may be due -to a cen-trifugal separa-tion action which takes place during the cyclonic swirling of -the material between the inlet passage and the several discharge passages. Wha-tever the reason, in such apparatus I have found tha-t -the first discharge passage contains a greater quantity of solid material with the quan-tity of solid material diminishing progressively to -the last in the series of
-2~
lOl~0~83 discharge passages. This of course results in the solid material being dispensed in unequal quantities from the several , discharge passages.
In the case where the material is being disch,arged to several points on a vibratin~ screen or to several vibrating screens, or both, the solid material to be screened is not uniformly distributed on the screen or scrPens with an obvious inefficiency of operation. Similar objections would arise when the material is being divided up by the flow divider for other purposes.
SU~IMARY OF THE INVENTION ~ ,~
_ __ _____ _ _ __ :
The presen-t invention provides a flow divider for separa-tiny a stream of liquid having particles of solid material entrained or suspended therein into a plurality of streams having substantially uniform concentrations of solid particles ,, therein. The flow divider comprises an upr,ight cylindrical '' tank having an inlet passage for the liquid disposed at an , upper portion of the tank and entering the same tangentially, , ' a plurality of discharge passages at a lower portion o~ the ~ ' 20 tank arranged to leave the tank tangentially in the direction , , of circular flow of the liquid in the tank, and an annular ~' flange extending horizontally about the interior o~ the tank " '' and extending radially inwardly from the wall thereof above and in proximity to the outlet passages to cause the peripheral ' portions of the liquid and solids to flow radially inwardly whereby such portions are carried downwardly into more central portions of the liquid substantially at the level of the dis-charge passages and are admixed therewith in the radially out-ward flow of such more central portions to the discharge passages.
.
~, ' ', .
lOl~0~83 discharge passages. This of course results in the solid material being dispensed in unequal quantities from the several , discharge passages.
In the case where the material is being disch,arged to several points on a vibratin~ screen or to several vibrating screens, or both, the solid material to be screened is not uniformly distributed on the screen or scrPens with an obvious inefficiency of operation. Similar objections would arise when the material is being divided up by the flow divider for other purposes.
SU~IMARY OF THE INVENTION ~ ,~
_ __ _____ _ _ __ :
The presen-t invention provides a flow divider for separa-tiny a stream of liquid having particles of solid material entrained or suspended therein into a plurality of streams having substantially uniform concentrations of solid particles ,, therein. The flow divider comprises an upr,ight cylindrical '' tank having an inlet passage for the liquid disposed at an , upper portion of the tank and entering the same tangentially, , ' a plurality of discharge passages at a lower portion o~ the ~ ' 20 tank arranged to leave the tank tangentially in the direction , , of circular flow of the liquid in the tank, and an annular ~' flange extending horizontally about the interior o~ the tank " '' and extending radially inwardly from the wall thereof above and in proximity to the outlet passages to cause the peripheral ' portions of the liquid and solids to flow radially inwardly whereby such portions are carried downwardly into more central portions of the liquid substantially at the level of the dis-charge passages and are admixed therewith in the radially out-ward flow of such more central portions to the discharge passages.
.
~, ' ', .
3--108~)0~3 BRIEF DESCRIPTION OF THE DRAWINGS
.. ..... _ . _ _ Fig. 1 is a general top plan view of one form of the apparatus of the present invention in which the flow divider is supplying two vibrating screen structures; ;~
Fig. 2 is a side elevational view of the apparatus of Fig. l;
Fig. 3 is a top plan view of the flow divider of Figs. 1 and 2;
Fig. 4 is a side elevational view thereof; and -Fig. 5 is a fragmentary cross-sectional view through the -flow divider of Figs. 3 and 4 taken on a vertical planè.
DESCRIPTION OF THE ILLUSTRATED EMBODIMENT
Referring ~irst to Figs. 1 and 2 the numeral 10 desig-nates generally a flow divider according to the present invention and the , ' ', .
:
...
....
-3a-~80083 . .
numerals 11 and 12 designate generally a pair of vibrating screen devices. A liquid or slurry containing solid ma-terial which is to be screened is in-troduced to the flow div:ider 10 by way of a condui-t 13 and in the present embodiment flow divlder 10 is provided wi-th six discharge condui-ts designated 16 -through 21.
The discharge conduits 16, 17 and 18 lead to screen 11 and discharge, respectively, into distributing boxes 24, 25 and 26. The distribu-ting boxes spread -the ma-terial issuing from the flow divider discharge condui-ts laterally with respec-t to -the screen structures to deposit -the same evenly on -the screen surfaces and also serve -to reduce the veloci-ty of the ma-terial as it is deposited upon -the screen surfaces.
Similarly~ discharge conduits L9, 20 and 21 discharge respec-tively into distributing boxes 28, 29 and 30 of the screening de-vices 12. As appears from Fig. 2, the screen structures in the present instance each contain three screen surfaces which in -the case of screen 12 are designated 32, 33 and 34. Of course -the flow dividing means of the presen-t invention may be employed with e~ual efficacy in the case of a single continuous screen surface.
In Fig. 2 the numeral 35 designates -the means for vibrating the screen fram~. I-t is to be understood that the screen structures are known in this art and are shown and described here merely in general terms and to assist in any understanding of the functioning of the flow divider which forms the subject of the inven-tion.
Fig. 3 is a detailed top plan view of -the flow divider 10 show-; ing -the entry duct L3 and -the series of discharge passages 16 through 21. In the form shown herein by way of example the flow divider 10 consists of an upper hollow cylindrical member 40 having top and bottom marginal 1anges 41 and 42 and a lower hollow cylindrical mem-ber 44 having top and bottom marginal flanges 45 ancl 46. As shown in Fig. 5 an annular pla-te 50 is disposed between the flcmges 42 and 45 of cylindrical sections 40 and 44 and its inner margina:L portion projects into the cylindrical interior of -the flow alivider.
~L08V~83 Speaking in general -terms, with flow divider drums of from 18 -to 24 inches inside diameters, when annular plate 50 projects into -the interior of the drum chamber a dis-tance of about one inch excel-len-t results are attained wi-th average liquid mix-tures and under normal conditions.
In Figs. 4 and 5 -the numeral 52 desiqnates a discoidal bo-ttom pla-te which is a-ttached -to flange 46 of cylindrical member 44 and -the numeral 53 designates a removable top cover member. The la-t~ter is preferably of acrylic resin or other -transparent material so that the action wi-thin the flow divider may readily be observed.
It is essential to proper operation of -the present flow divider -that the -tank be filled with liquid during flow dividing opera-tion and to this end a vent nipple 56 is disposed centra:Lly of the top plate 53 of the tank to permit egress of air from the tank and thus lnsure that the tank is filled with liquid. As indicated in Figs.
3 and 4 the nipple 56 may be provided with a hose 57 which may dis-charge into one of -the feed boxes 24 through 30 to recover liquid which may incidentally discharge from the nipple 56 or such dis-charge may be dealt with in any other convenient or desired manner.
As indicated earlier herein, -the use of -the flow divider of the present invention is no-t limited to screening opera-tions but may be employed wherever or whenever equal division of a ~low of liquid is required.
A preferred embodimen-t of the present invention has been des-cribed herein and shown in -the accompanying drawings to illustrate the underlying principles of -the invention but it is to be under-stood that numerous modifications may be made withou-t depar-ting from -the broad spirit and scope of -the invention.
~ . ... .. ., . ,: . ... . . ... . . . . . . . .
.. ..... _ . _ _ Fig. 1 is a general top plan view of one form of the apparatus of the present invention in which the flow divider is supplying two vibrating screen structures; ;~
Fig. 2 is a side elevational view of the apparatus of Fig. l;
Fig. 3 is a top plan view of the flow divider of Figs. 1 and 2;
Fig. 4 is a side elevational view thereof; and -Fig. 5 is a fragmentary cross-sectional view through the -flow divider of Figs. 3 and 4 taken on a vertical planè.
DESCRIPTION OF THE ILLUSTRATED EMBODIMENT
Referring ~irst to Figs. 1 and 2 the numeral 10 desig-nates generally a flow divider according to the present invention and the , ' ', .
:
...
....
-3a-~80083 . .
numerals 11 and 12 designate generally a pair of vibrating screen devices. A liquid or slurry containing solid ma-terial which is to be screened is in-troduced to the flow div:ider 10 by way of a condui-t 13 and in the present embodiment flow divlder 10 is provided wi-th six discharge condui-ts designated 16 -through 21.
The discharge conduits 16, 17 and 18 lead to screen 11 and discharge, respectively, into distributing boxes 24, 25 and 26. The distribu-ting boxes spread -the ma-terial issuing from the flow divider discharge condui-ts laterally with respec-t to -the screen structures to deposit -the same evenly on -the screen surfaces and also serve -to reduce the veloci-ty of the ma-terial as it is deposited upon -the screen surfaces.
Similarly~ discharge conduits L9, 20 and 21 discharge respec-tively into distributing boxes 28, 29 and 30 of the screening de-vices 12. As appears from Fig. 2, the screen structures in the present instance each contain three screen surfaces which in -the case of screen 12 are designated 32, 33 and 34. Of course -the flow dividing means of the presen-t invention may be employed with e~ual efficacy in the case of a single continuous screen surface.
In Fig. 2 the numeral 35 designates -the means for vibrating the screen fram~. I-t is to be understood that the screen structures are known in this art and are shown and described here merely in general terms and to assist in any understanding of the functioning of the flow divider which forms the subject of the inven-tion.
Fig. 3 is a detailed top plan view of -the flow divider 10 show-; ing -the entry duct L3 and -the series of discharge passages 16 through 21. In the form shown herein by way of example the flow divider 10 consists of an upper hollow cylindrical member 40 having top and bottom marginal 1anges 41 and 42 and a lower hollow cylindrical mem-ber 44 having top and bottom marginal flanges 45 ancl 46. As shown in Fig. 5 an annular pla-te 50 is disposed between the flcmges 42 and 45 of cylindrical sections 40 and 44 and its inner margina:L portion projects into the cylindrical interior of -the flow alivider.
~L08V~83 Speaking in general -terms, with flow divider drums of from 18 -to 24 inches inside diameters, when annular plate 50 projects into -the interior of the drum chamber a dis-tance of about one inch excel-len-t results are attained wi-th average liquid mix-tures and under normal conditions.
In Figs. 4 and 5 -the numeral 52 desiqnates a discoidal bo-ttom pla-te which is a-ttached -to flange 46 of cylindrical member 44 and -the numeral 53 designates a removable top cover member. The la-t~ter is preferably of acrylic resin or other -transparent material so that the action wi-thin the flow divider may readily be observed.
It is essential to proper operation of -the present flow divider -that the -tank be filled with liquid during flow dividing opera-tion and to this end a vent nipple 56 is disposed centra:Lly of the top plate 53 of the tank to permit egress of air from the tank and thus lnsure that the tank is filled with liquid. As indicated in Figs.
3 and 4 the nipple 56 may be provided with a hose 57 which may dis-charge into one of -the feed boxes 24 through 30 to recover liquid which may incidentally discharge from the nipple 56 or such dis-charge may be dealt with in any other convenient or desired manner.
As indicated earlier herein, -the use of -the flow divider of the present invention is no-t limited to screening opera-tions but may be employed wherever or whenever equal division of a ~low of liquid is required.
A preferred embodimen-t of the present invention has been des-cribed herein and shown in -the accompanying drawings to illustrate the underlying principles of -the invention but it is to be under-stood that numerous modifications may be made withou-t depar-ting from -the broad spirit and scope of -the invention.
~ . ... .. ., . ,: . ... . . ... . . . . . . . .
Claims (7)
The embodiments of the invention in which an exclusive prop-erty or privilege is claimed are defined as follows:
1. A flow divider for separating a stream of liquid having particles of solid material entrained or suspended therein into a plurality of streams having substantially uniform concentrations of solid particles therein, said flow divider comprising a cylindrical tank having an inlet passage for said liquid disposed at an upper portion of said tank and entering the same tangentially, a plurality of discharge passages at a lower portion of said tank and arranged to leave the tank tangentially in the direction of circular flow of said liquid in said tank, and an annular flange extending horizon-tally about the interior of the tank and extending radially inwardly from the wall thereof above and in proximity to said outlet passages to cause the peripheral portions of the liquid and solids to flow radially inwardly whereby such portions are carried downwardly into more central portions of the liquid substantially at the level of the discharge passages and are admixed therewith in the radially outward flow of such more central portions to the discharge passages.
2. A flow divider according to claim 1 wherein the several discharge passages are spaced substantially uniformly about said tank.
3. A flow divider according to claim 1 wherein the several discharge passages are disposed substantially in a common horizontal plane.
4. A flow divider according to claim 1 wherein the several discharge passages are of uniform cross-sectional area.
5. A flow divider according to claim 2 wherein the several discharge passages are disposed substantially in a common horizontal plane.
6. A flow divider according to claim 1 wherein said tank com-prises a closed chamber having a central vent passage in the upper end thereof.
7. A flow divider according to claim 1 having a top wall having a central vent passage extending upwardly therethrough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA294,469A CA1080083A (en) | 1978-01-06 | 1978-01-06 | Flow divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA294,469A CA1080083A (en) | 1978-01-06 | 1978-01-06 | Flow divider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1080083A true CA1080083A (en) | 1980-06-24 |
Family
ID=4110468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA294,469A Expired CA1080083A (en) | 1978-01-06 | 1978-01-06 | Flow divider |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1080083A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5435493A (en) * | 1994-04-21 | 1995-07-25 | J. Houle Et Fils Inc. | Manure distributor with atop discharge pipes and manure spreader incorporating the same |
-
1978
- 1978-01-06 CA CA294,469A patent/CA1080083A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5435493A (en) * | 1994-04-21 | 1995-07-25 | J. Houle Et Fils Inc. | Manure distributor with atop discharge pipes and manure spreader incorporating the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |