CA1039070A - Method and apparatus for inhibiting sedimentation of particulate material in water - Google Patents
Method and apparatus for inhibiting sedimentation of particulate material in waterInfo
- Publication number
- CA1039070A CA1039070A CA248,184A CA248184A CA1039070A CA 1039070 A CA1039070 A CA 1039070A CA 248184 A CA248184 A CA 248184A CA 1039070 A CA1039070 A CA 1039070A
- Authority
- CA
- Canada
- Prior art keywords
- water
- pipe
- pump pipe
- particulate material
- pump
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
- E02B3/023—Removing sediments
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Treatment Of Sludge (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
T I T L E
METHOD AND APPARATUS FOR INHIBITING
SEDIMENTATION OF PARTICULATE MATERIAL
IN WATER
ABSTRACT
A method of an apparatus for inhibiting sedimentation of particulate material in water. Water containing suspended particulate material is pumped upwards from a suction region above the bottom and is transported away laterally by means of the lateral displacement of the upper level of the water. To ad-vantage at least one inlet pipe is connected to the lower portion of an upstanding pump pipe for increasing the range of the apparatus.
METHOD AND APPARATUS FOR INHIBITING
SEDIMENTATION OF PARTICULATE MATERIAL
IN WATER
ABSTRACT
A method of an apparatus for inhibiting sedimentation of particulate material in water. Water containing suspended particulate material is pumped upwards from a suction region above the bottom and is transported away laterally by means of the lateral displacement of the upper level of the water. To ad-vantage at least one inlet pipe is connected to the lower portion of an upstanding pump pipe for increasing the range of the apparatus.
Description
SPECIFICATION
This invention relates to a method of and an apparatus for inhibiting sedimentation in water~ In order to maintain a sufficient water depth it is known to stir up the hottom regularly by means of dredgers. In places subject to heavy sedimentation or silting, the dredging has to be carried out at short intervals. Such conventional dredging involves great costs. In German Patent Specification No. 371,132, it has also been suggested to use the tide for transporting sedimented particles from the bottom to a recep~acle via a pipe. This apparatus would have a very limited capacity, since the effective suction area around the mouth of the pipe is very small and the pumping action due to the range of tide is unsufficient. Further, the dredged material collected in the recepeacle would have to .~ `
~.
' " '' '' ' . ' - ' ~ ' , '. ' " ' , ~ . ' ', ' ` ' `,' ` : ' ' ' . ' ' " " ' " " ', . . "" ' ' ' ~' ,' ' ~
' ," ' ' ' . ', , ' ' ', . . . . . ' ' ' ~ ' ' ~ , '. ' ,: ' ' . ' ' : " ' : , ' ' ' , ' "" ''' ` ,.' '' , .. , .. ,.: ~ , ' .
'" ~. ., ','. ' `": ' ' ~ ' ' . ~ . ' ' , be removed from time to time. ~0390 Summary of the Invention According to one aspect of the invention there is provided a method of inhibiting sedimentation of particulate material in a body of water, in which suction is maintained in a region of substantial transverse extent spaced above the bottom of the body of water, so as to draw water containing suspended particulate material into the suction region without drawing in already sedimentad particles from the bottom, the suction being maintained by conducting the water containing suspended particulate material from the suction region to an upper level, which is below the uppermost water level, through a pump pipe by an air lift pumping effect, the pump pipe having its lower end connected to the suction region and having its upper end located at the upper level and submerged in the body of water, the water at the upper level being subject to lateral displacement whereby the particulate material in the water conducted to the upper level is transported away.
According to another aspect of the invention there is provided apparatus for inhibiting sedimentation of particulate material in a body of water, comprising an air lift pumping effect pump having an upstanding pump pipe extending between an upper waterlevel and a lower water level spaced above the bottom of the body of water, and at least one inlet pipe connected to the lower portion of the pump pipe and extending transversely from the pump pipe to define a suction region of substantial transverse extent at the lower water level, at least one of said inlet pipes having inlet openings spaced along the length thereof.
In the accompanying drawings one embodiment of the invention is illustrated by way of example. It should be understood,that this embodi-ment is only illustrative of the invention and that various modifications thereof may be made within the scope of the claims following hereinafter.
In the drawings, Fig. 1 is a fragmentary side view of apparatus for inhibiting sedlmentation in water;
~.
This invention relates to a method of and an apparatus for inhibiting sedimentation in water~ In order to maintain a sufficient water depth it is known to stir up the hottom regularly by means of dredgers. In places subject to heavy sedimentation or silting, the dredging has to be carried out at short intervals. Such conventional dredging involves great costs. In German Patent Specification No. 371,132, it has also been suggested to use the tide for transporting sedimented particles from the bottom to a recep~acle via a pipe. This apparatus would have a very limited capacity, since the effective suction area around the mouth of the pipe is very small and the pumping action due to the range of tide is unsufficient. Further, the dredged material collected in the recepeacle would have to .~ `
~.
' " '' '' ' . ' - ' ~ ' , '. ' " ' , ~ . ' ', ' ` ' `,' ` : ' ' ' . ' ' " " ' " " ', . . "" ' ' ' ~' ,' ' ~
' ," ' ' ' . ', , ' ' ', . . . . . ' ' ' ~ ' ' ~ , '. ' ,: ' ' . ' ' : " ' : , ' ' ' , ' "" ''' ` ,.' '' , .. , .. ,.: ~ , ' .
'" ~. ., ','. ' `": ' ' ~ ' ' . ~ . ' ' , be removed from time to time. ~0390 Summary of the Invention According to one aspect of the invention there is provided a method of inhibiting sedimentation of particulate material in a body of water, in which suction is maintained in a region of substantial transverse extent spaced above the bottom of the body of water, so as to draw water containing suspended particulate material into the suction region without drawing in already sedimentad particles from the bottom, the suction being maintained by conducting the water containing suspended particulate material from the suction region to an upper level, which is below the uppermost water level, through a pump pipe by an air lift pumping effect, the pump pipe having its lower end connected to the suction region and having its upper end located at the upper level and submerged in the body of water, the water at the upper level being subject to lateral displacement whereby the particulate material in the water conducted to the upper level is transported away.
According to another aspect of the invention there is provided apparatus for inhibiting sedimentation of particulate material in a body of water, comprising an air lift pumping effect pump having an upstanding pump pipe extending between an upper waterlevel and a lower water level spaced above the bottom of the body of water, and at least one inlet pipe connected to the lower portion of the pump pipe and extending transversely from the pump pipe to define a suction region of substantial transverse extent at the lower water level, at least one of said inlet pipes having inlet openings spaced along the length thereof.
In the accompanying drawings one embodiment of the invention is illustrated by way of example. It should be understood,that this embodi-ment is only illustrative of the invention and that various modifications thereof may be made within the scope of the claims following hereinafter.
In the drawings, Fig. 1 is a fragmentary side view of apparatus for inhibiting sedlmentation in water;
~.
-2-~
..... . .
., :
. -1039(~70 Fig. 2 is a fragmentary plan view of the apparatus; and Fig. 3 is a fragmentary schematic vertical section through the apparatus.
-2a-:: :
- . ..
.
~J39~1q0 Detailed description of ;llustrated embodiment A number of transversely or radially extending inlet pipes 1 are connected to a pump pipe 3 near it~ (preferably) closed lower end 8. The inlet pip~ increase the range of the S apparatus. In some cases, for instance where the pump pipe is disposed near to a stationary object, such as a pier, only one or a couple of inlet pipes are needed. The pipe system is anchored to the bottom B by means of an anchoring weight 2.
Pressure air i9 supplied to the pump 3 (near its lower end) from a compressor via a hose 4. The compressor may be located arbitrarily above the uppermost water level. An air inlet ring S is mounted around the interior of the pipe 3; it i5 perforated for admitting pressure air into the pipe 3. The ring 5 is connec-ted to the hose 4 via a T-junction, The ring 5 and the hose 4 are preferably made of a plastics material. In order to further increase the range of the apparatus, one or several of the inlet pipes 1 may be branched at their outer ends to branching pipes 6, 7, When pressure air is supplied to the pump pipe 3, there is obtained 8 ~uction force in the inlet pipes 1, since the mixture of water and air in the pipe 3 tends to rise, being less dense than the water in which th~ pipe 3 is submerged below the uppermost water level A. Wate~ mixed with mut particles (silt) is collected into the inlet pipe 1 and pumped through the pump pipe 3 to an upper water level by the air lift pumping effect, The inlet pipes 1 and the branching pipes 6, 7 may be provided with inlet openings mutually spaced therealong so that silt between the outer ends of the pipes 1, 6, 7 and the pump pipe 3 may be collected. For the same purpose, the pump pipe 3 may be provided with inlet openings just above the air inlet ring 5.
The pipe~ 1, 6, 7 are preferably dimen~ioned 80 that the same flow velocity i~ obtained in each part of the system:
_ 3 _ . : . .
~.(139070 the sum of the cross-6ect;0nal areas of the branching pipe~
6 and 7 is substan~ial17 equal to the cross sectional area of the respective inlet pipe 1, the sum of the cross-sectional areas of the pipe 1 is substantially equal to the cross-sectional area of the pump pipe 3, The pipes 1, 3, 6, 7 may be made of any suitable material, but is preferably of a plastics material because of its corrosion resistance.
In order to ensure that the inlet pipes 1, 6, 7 follow the configuration of the bottom, the joint between an inlet pipe 1 and the pump pipe 3 may be pivotable. Because of the depression in the pipe system, the pivotable joint must be non-collapsible. The joint may consist of a short flexible metallic tube between an inlet orifice of the pump pipe 3 and the outlet end of the respective inlet pipe 1 If the inlet pipe 1 itself is flexible enough, it may be connected directly to the inlet orifice The apparatus may be used to advantage in water subject to heavy sedimentation. Such water may be in a river or a channel where the tide causes transportation of silt in the direction of the tidal flow. In such water, conventional dredging has to be carried out regularly, for instance along piers and quay structures. By installing one or more apparatuses as described above, sedimentation is inhibited and dredging is virtually unnecessary, It is to be observed that the apparatus does not work as a conventional dredger since it does not effectively remove already sedimented material, just prevents continued sedimentation. Before înstalling the apparatus, the bottom has to be dredged up to a desired depth in a conventional manner. The `~
apparatus, then, maintain~ the bottom at this desired depth, `~
Instead of using an anchoring weight, the apparatus may be anchored by clamping the pump pipe 3 to a stationary object, such as a pier, The pump pipe 3 preferably extends from the bottom to an upper level between high waeer and low water. In this . . . ~
1~390q~
case the apparatus is not run continually but only after the high water, when the silt is pumped to the upper level;
as the water ebbs, the tidal current transp~rts the silt a~ay.
~: : :: ~ , ;, ::,. : . : , , , i,.: , ::, ,
..... . .
., :
. -1039(~70 Fig. 2 is a fragmentary plan view of the apparatus; and Fig. 3 is a fragmentary schematic vertical section through the apparatus.
-2a-:: :
- . ..
.
~J39~1q0 Detailed description of ;llustrated embodiment A number of transversely or radially extending inlet pipes 1 are connected to a pump pipe 3 near it~ (preferably) closed lower end 8. The inlet pip~ increase the range of the S apparatus. In some cases, for instance where the pump pipe is disposed near to a stationary object, such as a pier, only one or a couple of inlet pipes are needed. The pipe system is anchored to the bottom B by means of an anchoring weight 2.
Pressure air i9 supplied to the pump 3 (near its lower end) from a compressor via a hose 4. The compressor may be located arbitrarily above the uppermost water level. An air inlet ring S is mounted around the interior of the pipe 3; it i5 perforated for admitting pressure air into the pipe 3. The ring 5 is connec-ted to the hose 4 via a T-junction, The ring 5 and the hose 4 are preferably made of a plastics material. In order to further increase the range of the apparatus, one or several of the inlet pipes 1 may be branched at their outer ends to branching pipes 6, 7, When pressure air is supplied to the pump pipe 3, there is obtained 8 ~uction force in the inlet pipes 1, since the mixture of water and air in the pipe 3 tends to rise, being less dense than the water in which th~ pipe 3 is submerged below the uppermost water level A. Wate~ mixed with mut particles (silt) is collected into the inlet pipe 1 and pumped through the pump pipe 3 to an upper water level by the air lift pumping effect, The inlet pipes 1 and the branching pipes 6, 7 may be provided with inlet openings mutually spaced therealong so that silt between the outer ends of the pipes 1, 6, 7 and the pump pipe 3 may be collected. For the same purpose, the pump pipe 3 may be provided with inlet openings just above the air inlet ring 5.
The pipe~ 1, 6, 7 are preferably dimen~ioned 80 that the same flow velocity i~ obtained in each part of the system:
_ 3 _ . : . .
~.(139070 the sum of the cross-6ect;0nal areas of the branching pipe~
6 and 7 is substan~ial17 equal to the cross sectional area of the respective inlet pipe 1, the sum of the cross-sectional areas of the pipe 1 is substantially equal to the cross-sectional area of the pump pipe 3, The pipes 1, 3, 6, 7 may be made of any suitable material, but is preferably of a plastics material because of its corrosion resistance.
In order to ensure that the inlet pipes 1, 6, 7 follow the configuration of the bottom, the joint between an inlet pipe 1 and the pump pipe 3 may be pivotable. Because of the depression in the pipe system, the pivotable joint must be non-collapsible. The joint may consist of a short flexible metallic tube between an inlet orifice of the pump pipe 3 and the outlet end of the respective inlet pipe 1 If the inlet pipe 1 itself is flexible enough, it may be connected directly to the inlet orifice The apparatus may be used to advantage in water subject to heavy sedimentation. Such water may be in a river or a channel where the tide causes transportation of silt in the direction of the tidal flow. In such water, conventional dredging has to be carried out regularly, for instance along piers and quay structures. By installing one or more apparatuses as described above, sedimentation is inhibited and dredging is virtually unnecessary, It is to be observed that the apparatus does not work as a conventional dredger since it does not effectively remove already sedimented material, just prevents continued sedimentation. Before înstalling the apparatus, the bottom has to be dredged up to a desired depth in a conventional manner. The `~
apparatus, then, maintain~ the bottom at this desired depth, `~
Instead of using an anchoring weight, the apparatus may be anchored by clamping the pump pipe 3 to a stationary object, such as a pier, The pump pipe 3 preferably extends from the bottom to an upper level between high waeer and low water. In this . . . ~
1~390q~
case the apparatus is not run continually but only after the high water, when the silt is pumped to the upper level;
as the water ebbs, the tidal current transp~rts the silt a~ay.
~: : :: ~ , ;, ::,. : . : , , , i,.: , ::, ,
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of inhibiting sedimentation of particulate material in a body of water, in which suction is maintained in a region of substantial transverse extent spaced above the bottom of the body of water, so as to draw water containing suspended particulate material into the suction region without drawing in already sedimented particles from the bottom, the suction being maintained by conducting the water containing suspended particulate material from the suction region to an upper level, which is below the upper-most water level, through a pump pipe by an air lift pumping effect, the pump pipe having its lower end connected to the suction region and having its upper end located at the upper level and submerged in the body of water, the water at the upper level being subject to lateral displacement whereby the particulate material in the water conducted to the upper level is transported away.
2. A method according to claim 1, in which at least one branching pipe is connected to the suction region to increase the range thereof.
3. Apparatus for inhibiting sedimentation of particulate material in a body of water, comprising an air lift pumping effect pump having an upstand-ing pump pipe extending between an upper waterlevel and a lower water level spaced above the bottom of the body of water, and at least one inlet pipe connected to the lower portion of the pump pipe and extending transversely from the pump pipe to define a suction region of substantial transverse extent at the lower water level, at least one of said inlet pipes having inlet open-ings spaced along the length thereof.
4. Apparatus as claimed in claim 3, in which at least a portion of said at least one inlet pipe is flexible so as to permit upward bending of said at least one inlet pipe relative to the pump pipe.
5. Apparatus as claimed in claim 3, in which each inlet pipe is flexibly connected to the lower portion of the pump pipe so as to permit upward bending of said each inlet pipe relative to the pump pipe.
6. Apparatus as claimed in claim 3, in which the lower end of the pump pipe is closed.
7. Apparatus as claimed in claim 3 or 4, including anchoring means for fixing the pump pipe relative to the bottom of the body of water.
8. Apparatus as claimed in claim 3 or 4, in which each inlet pipe is connected to branching pipes at its outer end.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB11486/75A GB1492624A (en) | 1975-03-19 | 1975-03-19 | Inhibiting sedimentation in water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1039070A true CA1039070A (en) | 1978-09-26 |
Family
ID=9987150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA248,184A Expired CA1039070A (en) | 1975-03-19 | 1976-03-18 | Method and apparatus for inhibiting sedimentation of particulate material in water |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE830560A (en) |
| CA (1) | CA1039070A (en) |
| FR (1) | FR2304391A1 (en) |
| GB (1) | GB1492624A (en) |
| NL (1) | NL179494C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8203502L (en) * | 1982-06-07 | 1983-12-08 | Atlas Copco Ab | PROCEDURE AND DEVICE FOR TRANSFER OF SEDIMENT |
| BE893794A (en) * | 1982-07-08 | 1983-01-10 | Ondermemingen Sbbm De | METHOD AND APPARATUS FOR Sludge removal |
| GB9119008D0 (en) * | 1991-09-05 | 1991-10-23 | Packham Christopher | Dredging apparatus |
| DE4240257A1 (en) * | 1992-12-01 | 1994-06-09 | Klein Schanzlin & Becker Ag | Process for reducing sedimentation in port or sewer systems |
| US9157204B2 (en) | 2009-10-09 | 2015-10-13 | Webster Pierce, Jr. | Wave suppressor and sediment collection system |
| US8226325B1 (en) * | 2009-10-09 | 2012-07-24 | Pierce Jr Webster | Wave suppressor and sediment collection system |
| US8985896B2 (en) | 2009-10-09 | 2015-03-24 | Webster Pierce, Jr. | Water suppressor and sediment collection system for use in shallow and deeper water environments |
| CN102912761B (en) * | 2012-11-06 | 2015-03-18 | 陈伟 | Wind force dredging method for river |
| CN108483621B (en) * | 2018-04-17 | 2020-04-21 | 西安建筑科技大学 | Optimal region for determining multi-stage water inlet process of sewage treatment and adjusting method |
-
1975
- 1975-03-19 GB GB11486/75A patent/GB1492624A/en not_active Expired
- 1975-05-21 FR FR7515777A patent/FR2304391A1/en active Granted
- 1975-06-02 NL NLAANVRAGE7506515,A patent/NL179494C/en not_active IP Right Cessation
- 1975-06-24 BE BE157609A patent/BE830560A/en not_active IP Right Cessation
-
1976
- 1976-03-18 CA CA248,184A patent/CA1039070A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1492624A (en) | 1977-11-23 |
| FR2304391A1 (en) | 1976-10-15 |
| NL7506515A (en) | 1976-09-21 |
| DE2522868A1 (en) | 1976-09-23 |
| BE830560A (en) | 1975-10-16 |
| NL179494B (en) | 1986-04-16 |
| DE2522868B2 (en) | 1977-06-23 |
| NL179494C (en) | 1986-09-16 |
| FR2304391B1 (en) | 1982-01-29 |
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