CA1164585A - Floating water-purification apparatus - Google Patents
Floating water-purification apparatusInfo
- Publication number
- CA1164585A CA1164585A CA000383900A CA383900A CA1164585A CA 1164585 A CA1164585 A CA 1164585A CA 000383900 A CA000383900 A CA 000383900A CA 383900 A CA383900 A CA 383900A CA 1164585 A CA1164585 A CA 1164585A
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- CA
- Canada
- Prior art keywords
- water
- air
- frame
- conduit
- valves
- 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
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Classifications
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
ABSTRACT
Apparatus for purifying a body of water is described. Air is drawn in by a water-jet pump and the air rich water is pumped through a conduit, the pump and the conduit lying beneath the surface of the water, as is known.
According to the invention, the conduit is double walled, having an air permeable inner wall and an air impermeable outer wall. Air bubbles tend to collect on the inner wall, which may be formed as a fine-mesh screen, thus increasing the period of residence of the air in the body of water and enhancing the purifying effect. The apparatus is carried on a frame comprising an upper tubular frame and a lower tubular frame interconnected by vertical tubes. The combined frame may be lowered and raised by flooding and venting, respectively, by means of suitable valves. Longitudinal sections of the frame may be partitioned off from each other, thus permitting frame sections to be controlled independently so as to vary the attitude of the frame.
Apparatus for purifying a body of water is described. Air is drawn in by a water-jet pump and the air rich water is pumped through a conduit, the pump and the conduit lying beneath the surface of the water, as is known.
According to the invention, the conduit is double walled, having an air permeable inner wall and an air impermeable outer wall. Air bubbles tend to collect on the inner wall, which may be formed as a fine-mesh screen, thus increasing the period of residence of the air in the body of water and enhancing the purifying effect. The apparatus is carried on a frame comprising an upper tubular frame and a lower tubular frame interconnected by vertical tubes. The combined frame may be lowered and raised by flooding and venting, respectively, by means of suitable valves. Longitudinal sections of the frame may be partitioned off from each other, thus permitting frame sections to be controlled independently so as to vary the attitude of the frame.
Description
~ rj The invention relates to an apparatus for purifying service water, more particularly for regenerating polluted water, with the aid of a water-jct pump which discharges air drawn in with the water, through an air-suction pipe, into a screen-like conduit, both of which runjointly for acertain distance below the surface of the water.
Apparatuses of this kind are used for the biological purification of sewage and for the regeneration of bodies of water which are largely polluted due to lack of oxygen. Apparatus is ]cnown (French Patent 13 77 571) in which the mixture oE water and air produced by a water-jet pump are held, for a period of time, in a mixing pipe, so that the forced passage of the discharge jet in-creases the period of residence of the air bubbles in the water. However, this does not greatly increase the period of residence, and the amount of oxygen in-troduced into the water is therefore inadequate. The reason for this is that a relatively high flow velocity obtains inthe screen~like cover designed as a mixing pipe with a diffuser. The period of residence of sewage and air therein is therefore relatively short.
Thus the disadvantage of the known apparatus for the purification of service water is that the individual air bubbles are usually screened very shor-t-ly after they leave the water-jet, where upon they rise to the surface. Another disadvantage is that in silted waters, the whole appara-tus rests upon the bottom~
so that mud is stirred up by the intakes of the water-jet pump, is drawn in, a~ld thus leads to premature contamination of the line.
The air bubbles rapidly come together and then rise, as large bubbles, along the surface of the air-permeable wall, to the surface of the water. In spite of this, this type of water purification causes less damage to the en-vironment than direct injection of compressed air into polluted bodies of water, since there is no need for compressors and the like equipment along the shore-- 1 - ~ .
~:, line.
It is the purpose of the invention to provide a water-purification apparatus which increases the period of residence of the air-bubbles, is inde-pendent of irregularities along the bottom of the body of water, is at all times located at a definite level below the surface of the water, and is not harmful to the environment.
According ~o the invention, this purpose is achieved in that the con-duit is of double-wall design and is arranged to slope towards the surface of the water, the inner part of the conduit being permeable to air, whereas the outer part thereof is impermeable to air, and in that the water-jet pump and the double-walled conduit are associated with a support-structure of tubular frames comprising vent-valves and flooding-valves.
l'he air drawn in by the water-jet pump, and divided into very fine air bubbles, is gulded, partly under the air-permeable inner part of the line and partly, after passing through the said inner part consisting, for example~ of a fine-meshed net, under the air-impermeable outer part of the line, to the end thereof, thus ensuring a satisfactory transfer of air to the stabilized part of the conduit. This substantially increases the period of residence.
The support-structure, consisting of tubular frames adapted to be flooded, may be located at a distance below the level of the water such that water supplied to the suction intakes of the water-jet pump does not stir up the mud on the bottom. The movement of water inside the apparatus also has no negative effect upon the apparatus itself, since any sludge deposited upon the bottom of the body of water may be churned up at the outlet from the apparatus, by the flow of water. The advantage of this is that the apparatus may be op-timally located regardless of the configuration of the bottom and of the degree of silting. In addition to this, there is very little harm to the environment ~ ' ~
~ 3 ~)45~.~
since the drive for the water-jet pump may be arranged in the body of water it-self, so that only the supply-cable and the air intake pipe are visible above the level of the water.
For the purpose of increasing the period of residence it is further-more desirable for the inner part of the line to be made of fine-meshed net, or of a plurality of fine-meshed nets, the size of the mesh increasing towards the outer part of the line. The individual nets provide support for each other and make it difficult for the air bubbles to agglomerate. In fact the said bubbles frequently adhere to the webs of the nets for a certain length of time and are thus swept by the water. The required satisfactory transfer of o~ygen is achiev-ed by this intimate and frequent contact.
The predetermined slope of the double-walled pipe may, if necessary, be varied and adapted to the requirements by partitioning the upper and lower tubular frames into a plurality of corresponding sections. Thus any desired slope may be imparted to the apparatus as a whole by flooding or evacuating in-dividual sections, without making any structural changes. This also has the advantage that the whole apparatus may be lowered or raised faster if required.
To this end the individual sections are equipped according to the invention withvent- and flooding valves.
According to one advantageous configuration of the invention, the vent-valves are associated with the upper tubular frame and the flooding valves with the lower. Although this has the slight disadvantage that dirt may enter the structure through the flooding valves, it has the advantage of faster flooding.
In this connection, the deep-down flooding valves may be operated mechanically by linkages from the surface of the water and this keeps down the control costs.As a simple means of keeping the support-structure in equilibrium, it is desirable to equip the upper tubular ~rame, in the vicinity of the water-jet -`` 1 .7 ~ 8 ~
pump, with a series of transverse tubes o a diameter corresponding to that of the tubular frame. The weight acting upon t]is part of the structure is thus equali~ed without any difficulty.
The most favourable possible weight distribution is achieved in the configuration according to the invention in which the compressor, pump and motor constituting the water-jet pump are arranged axially one behind the other. Prom the point of view of flow technique and power consumption, this arrangement has the advan~age that the water drawn in passes to the water-jet compressor with no change in direction.
In order ~o reduce the noise produced by drawing in air, it is pro-posed, according to the invention, to fit a silencer to -the free end of the air-intake pipe. This reduces the noise produced by the apparatus according to the invention to practically nil, since the water-jet pump itself, with its drive, is submerged in the water. Howeve-r, the motor, or even the motor and the pump, may be located above the upper tubular frame, if ~his is regarded as necessary and advantageous from the point of view of maintenance.
The vent- and flooding valves in each section are preferably arranged at the junctions thereof. This makes the valves easily accessible if, according to another configuration of the invention, the upper tubular frame is fitted, in the vicini~y of the said junctions between the sectionsS with brackets for a grating. Since the apparatus for purifying service water is usually located directly below the surface of the water, the gratings are above the water and may therefore easily be reached with dry feet. Since the length and width of the apparatus provide adequate stability~ the brackets may be made to extend, so that they are still above the surface of the water if the apparatus is submerged to a greater depth.
Since, as far as possible, the water containing the least amount of oxygen is to be gasified or enriched with oxygen7 it is desirable to connect thesuction side of the water-jet pump, through a hose line, to a suction station arranged on the bottom of the body of water. In this way, the suction station always supplies the apparatus with water containing little oxygen, without lower-ing the apparatus as a whole.
With a suction station arranged on the bottom, the intake of sludge and too heavily contaminated water is prevented, according to the invention, by fitting the said station with an upwardly directed inlet funnel arranged in a box-like housing with a vertically arranged coarse screen and a horizontal fine screen behind it. Water fed to the intake funnel is thus largely freed from con-taminants. Special guidance of the water ensures that the water drawn in does not create undue disturbance.
According to the invention, the purifying effect promoted by the supply of oxygen is increased by arranging, in the body of water to be cleaned, a plurality of water-jet pumps and double-walled lines located in tubular-frame support-structures in such a manner that they communicate with each other in drawing in and discharging water and, if necessary, producing and maintaining a water-circulation in the body of water. In stagnant water, this produces faster mixing with gas-enriched water, thus accelerating biological purification.
The period of residence of air bubbles, drawn in by the water-jet pump, within the double-walled pipe may be increased, according to the invention, in that either the front part of the interior of the pipe, serving as a flow duct, is adapted to pivot vertically, or the tip of the exterior of the pipe, serving as a cover, is adapted to pivot vertically. It is also conceivable to combine the two arrangements. This makes it possible to control the direction of the jet of water leaving the apparatus, and thus to adjust it as required.
It is usually desirable to leave the apparatus for some time at a .,.~
i ~
5 ~ 5 specific location in the body of water to be purified. In order to make this possible if the water is flowing at a specific velocity, the upper tubular rame has anchoring eyes at its ends by means of which the apparatus may be secured on land, or to the bottom of the body of water, by means of anchors or weights and suitable cables.
The invention is distinguished, more particularly, by the fact that the period of residence of air bubbles is substantially longer and the transfer of oxygen from the bubbles to the water ~o be purified is considerably improved.
The advantageous method of operation achieved by a water-jet pump associated with a double-walled conduit, even when used in highly contaminated and silted-up bodies of water over long periods of time, is thus assured, and the necessary drive-units and equipment producing noise are arranged and designed in such a manner 2S ~0 avoid harming the environment. The apparatus is furthermore easy to maintain and can be adapted without difficulty to varying requirements.
Th0 invention will now be described in greater detail with reference to the accompanying drawings in which:
Figure 1 is a longitudin~l section of purifying apparatus according to the present invention;
Figure 2 is an enlarged view of a portion of Figure 1 showing the drive-unit;
Figure 3 is a head-on view of the apparatus in the vicinity of the drive-unit;
Figure ~ is a cross-sectional view of the apparatus;
Figure 5 is an enlarged plan view of a detail of ~igure 1;
Figure 6 is an enlarged view of a portion of Figure 1 showing the suction-station;
Figure 7 is a plan view of the suction station of Figure 6.
i :~ 6~585 In Figure 1, the floating water-purification apparatus is referenced 1 in general. It consists of a support-structuer 2 which carries a water--jet pump 3 and double-walled pipe or conduit 4 ancl which is connected to a suction-station 5 resting upon the bottom of the kody of water 6.
Support-structure 2 comprises an upper tubular frame 7 and a lower tubular frame 8, both made of pairs of hollow tubes of the same diameter. The hollow tubes of lower frame 8are parallel and connected togetheT by transverse tubes 9. For the purpose oF forming a continuous air chamber, tubular frames 7, 8 are connected together by vertical tubes lO.
As may be gathered from Figures 2 and 3, among others, whereas the two parallel tubes of frame 8are connected together by transverse tubes 9, the two parallel tubes of upper tubular frame 7 are connected together by transverse braces 11, so that the entire apparatus 1 is in equilibrium. Frames 7, 8 are partitioned~ approximately centrally, by joints 14, thus producing sections 15, 16 ~Figure 5). Each section is fit~ed wi~h vent-valves 12, 12' and flooding valves 13, 13' (Figure 1) and each sec~ion of the combined frame 7, 8 may there-fore be flooded or evacuated simultaneously or at different ti~es.
Secured to upper tubular frame 7, by welding for example, are brackets for the support of a grating 1~ ~Figure 4). As shown in Figures 1 and 5, valves 12, 12', 13, 13' are easily accessible through the grating in the vicinity of junction 14~ if the valves need to be operated, or for maintenance purposes.
As shown in Figure 2, water-je~ pump 3 consists of a pump 20, prefer-ably an electrically driven motor 21, and a compressor 22. Air-suction pipe 23 enters between the said compressor and pump, through which the required oxygen or air is drawn in~o the jet of water. Fitted to free end 25 of air-suction pipe 23 is a silencer 24, the purpose of which is to reduce the a~.ount of noise made by air being drawn in. Pump 20, motor 21 and compressor 22 are arranged one ~ 7 -behind the other, thus producing a satisfactory weight distri~ution. Arranged in the vicinity of water-jet pump 3 and intercomlecting tubes 7 is a series oE
transverse tubes 9', 9" and 9"' for the purpose of distributing and equalizing the weight.
Floating water-purification apparatus 1 may easily be anchored in a predetermined position by securing to anchoring eyes 27, shown in Figure 3, cables secured to the shore or to weights.
Double-walled pipe or conduit 4 consists of an air permeable inner part 28 and an air impermeable outer part 32 as shown in Figures 3 and 4.
Inner part 28 is formed as a mesh with aplastic lining 30, so that air bubbles expelled by compressor 22 take some time to pass through the inner part and to collect upon corrugated outer part 32. This cor~lgation impedes the formation of large air bubbles rising quickly to surface 34 of the water. A comparison of Figures 3 and 4 shows that the cross-section formed by outer part 32 of the conduit increases towards the mouth 33 thereof, i.e. outer part 32 of the line slopes towards surface 34 of the water. Mouth 33 of outer part 32 of the line is pivotable, so that air bubbles arriving here may again be held up and be forced into the water.
The front portion of inner part 28 of the line is also pivotable in order to impart a specific direction to the flow of water. As may ~e gathered from Figure 1~ the front portion is directed towards the bottom of the body of water~ so that the oxygen-enriched flow of water is forced to flow along the bottom, ~hus displacing, or mixing with, the strata of water not yet enriched with oxygen. This optimizes the biological purifying effect.
Intake end 36 is connected by means of a hose line 35 to a suction station 5. It consists of a box-like housing 40 in which the inlet funnel con-nected to hose line 35 is arranged in such a manner that the opening thereof is ,.
5 ~ 5 directed towards surface 34 of the water. Housing 40, seated upon a platform 39 resting upon the bottom, encloses inlet funnel 38, so that the water is forced to enter the housing through platform 39, through a co~rse screen 41 and then through a fine screen 42, the coarse screen being spaced from housing 40 by sup-ports 43. It may be gathered from Figures 6 and 7 that suction station 5 pro-vides a relatively uniform flow of water, so that few contaminants reach the area between the two screens.
Apparatuses of this kind are used for the biological purification of sewage and for the regeneration of bodies of water which are largely polluted due to lack of oxygen. Apparatus is ]cnown (French Patent 13 77 571) in which the mixture oE water and air produced by a water-jet pump are held, for a period of time, in a mixing pipe, so that the forced passage of the discharge jet in-creases the period of residence of the air bubbles in the water. However, this does not greatly increase the period of residence, and the amount of oxygen in-troduced into the water is therefore inadequate. The reason for this is that a relatively high flow velocity obtains inthe screen~like cover designed as a mixing pipe with a diffuser. The period of residence of sewage and air therein is therefore relatively short.
Thus the disadvantage of the known apparatus for the purification of service water is that the individual air bubbles are usually screened very shor-t-ly after they leave the water-jet, where upon they rise to the surface. Another disadvantage is that in silted waters, the whole appara-tus rests upon the bottom~
so that mud is stirred up by the intakes of the water-jet pump, is drawn in, a~ld thus leads to premature contamination of the line.
The air bubbles rapidly come together and then rise, as large bubbles, along the surface of the air-permeable wall, to the surface of the water. In spite of this, this type of water purification causes less damage to the en-vironment than direct injection of compressed air into polluted bodies of water, since there is no need for compressors and the like equipment along the shore-- 1 - ~ .
~:, line.
It is the purpose of the invention to provide a water-purification apparatus which increases the period of residence of the air-bubbles, is inde-pendent of irregularities along the bottom of the body of water, is at all times located at a definite level below the surface of the water, and is not harmful to the environment.
According ~o the invention, this purpose is achieved in that the con-duit is of double-wall design and is arranged to slope towards the surface of the water, the inner part of the conduit being permeable to air, whereas the outer part thereof is impermeable to air, and in that the water-jet pump and the double-walled conduit are associated with a support-structure of tubular frames comprising vent-valves and flooding-valves.
l'he air drawn in by the water-jet pump, and divided into very fine air bubbles, is gulded, partly under the air-permeable inner part of the line and partly, after passing through the said inner part consisting, for example~ of a fine-meshed net, under the air-impermeable outer part of the line, to the end thereof, thus ensuring a satisfactory transfer of air to the stabilized part of the conduit. This substantially increases the period of residence.
The support-structure, consisting of tubular frames adapted to be flooded, may be located at a distance below the level of the water such that water supplied to the suction intakes of the water-jet pump does not stir up the mud on the bottom. The movement of water inside the apparatus also has no negative effect upon the apparatus itself, since any sludge deposited upon the bottom of the body of water may be churned up at the outlet from the apparatus, by the flow of water. The advantage of this is that the apparatus may be op-timally located regardless of the configuration of the bottom and of the degree of silting. In addition to this, there is very little harm to the environment ~ ' ~
~ 3 ~)45~.~
since the drive for the water-jet pump may be arranged in the body of water it-self, so that only the supply-cable and the air intake pipe are visible above the level of the water.
For the purpose of increasing the period of residence it is further-more desirable for the inner part of the line to be made of fine-meshed net, or of a plurality of fine-meshed nets, the size of the mesh increasing towards the outer part of the line. The individual nets provide support for each other and make it difficult for the air bubbles to agglomerate. In fact the said bubbles frequently adhere to the webs of the nets for a certain length of time and are thus swept by the water. The required satisfactory transfer of o~ygen is achiev-ed by this intimate and frequent contact.
The predetermined slope of the double-walled pipe may, if necessary, be varied and adapted to the requirements by partitioning the upper and lower tubular frames into a plurality of corresponding sections. Thus any desired slope may be imparted to the apparatus as a whole by flooding or evacuating in-dividual sections, without making any structural changes. This also has the advantage that the whole apparatus may be lowered or raised faster if required.
To this end the individual sections are equipped according to the invention withvent- and flooding valves.
According to one advantageous configuration of the invention, the vent-valves are associated with the upper tubular frame and the flooding valves with the lower. Although this has the slight disadvantage that dirt may enter the structure through the flooding valves, it has the advantage of faster flooding.
In this connection, the deep-down flooding valves may be operated mechanically by linkages from the surface of the water and this keeps down the control costs.As a simple means of keeping the support-structure in equilibrium, it is desirable to equip the upper tubular ~rame, in the vicinity of the water-jet -`` 1 .7 ~ 8 ~
pump, with a series of transverse tubes o a diameter corresponding to that of the tubular frame. The weight acting upon t]is part of the structure is thus equali~ed without any difficulty.
The most favourable possible weight distribution is achieved in the configuration according to the invention in which the compressor, pump and motor constituting the water-jet pump are arranged axially one behind the other. Prom the point of view of flow technique and power consumption, this arrangement has the advan~age that the water drawn in passes to the water-jet compressor with no change in direction.
In order ~o reduce the noise produced by drawing in air, it is pro-posed, according to the invention, to fit a silencer to -the free end of the air-intake pipe. This reduces the noise produced by the apparatus according to the invention to practically nil, since the water-jet pump itself, with its drive, is submerged in the water. Howeve-r, the motor, or even the motor and the pump, may be located above the upper tubular frame, if ~his is regarded as necessary and advantageous from the point of view of maintenance.
The vent- and flooding valves in each section are preferably arranged at the junctions thereof. This makes the valves easily accessible if, according to another configuration of the invention, the upper tubular frame is fitted, in the vicini~y of the said junctions between the sectionsS with brackets for a grating. Since the apparatus for purifying service water is usually located directly below the surface of the water, the gratings are above the water and may therefore easily be reached with dry feet. Since the length and width of the apparatus provide adequate stability~ the brackets may be made to extend, so that they are still above the surface of the water if the apparatus is submerged to a greater depth.
Since, as far as possible, the water containing the least amount of oxygen is to be gasified or enriched with oxygen7 it is desirable to connect thesuction side of the water-jet pump, through a hose line, to a suction station arranged on the bottom of the body of water. In this way, the suction station always supplies the apparatus with water containing little oxygen, without lower-ing the apparatus as a whole.
With a suction station arranged on the bottom, the intake of sludge and too heavily contaminated water is prevented, according to the invention, by fitting the said station with an upwardly directed inlet funnel arranged in a box-like housing with a vertically arranged coarse screen and a horizontal fine screen behind it. Water fed to the intake funnel is thus largely freed from con-taminants. Special guidance of the water ensures that the water drawn in does not create undue disturbance.
According to the invention, the purifying effect promoted by the supply of oxygen is increased by arranging, in the body of water to be cleaned, a plurality of water-jet pumps and double-walled lines located in tubular-frame support-structures in such a manner that they communicate with each other in drawing in and discharging water and, if necessary, producing and maintaining a water-circulation in the body of water. In stagnant water, this produces faster mixing with gas-enriched water, thus accelerating biological purification.
The period of residence of air bubbles, drawn in by the water-jet pump, within the double-walled pipe may be increased, according to the invention, in that either the front part of the interior of the pipe, serving as a flow duct, is adapted to pivot vertically, or the tip of the exterior of the pipe, serving as a cover, is adapted to pivot vertically. It is also conceivable to combine the two arrangements. This makes it possible to control the direction of the jet of water leaving the apparatus, and thus to adjust it as required.
It is usually desirable to leave the apparatus for some time at a .,.~
i ~
5 ~ 5 specific location in the body of water to be purified. In order to make this possible if the water is flowing at a specific velocity, the upper tubular rame has anchoring eyes at its ends by means of which the apparatus may be secured on land, or to the bottom of the body of water, by means of anchors or weights and suitable cables.
The invention is distinguished, more particularly, by the fact that the period of residence of air bubbles is substantially longer and the transfer of oxygen from the bubbles to the water ~o be purified is considerably improved.
The advantageous method of operation achieved by a water-jet pump associated with a double-walled conduit, even when used in highly contaminated and silted-up bodies of water over long periods of time, is thus assured, and the necessary drive-units and equipment producing noise are arranged and designed in such a manner 2S ~0 avoid harming the environment. The apparatus is furthermore easy to maintain and can be adapted without difficulty to varying requirements.
Th0 invention will now be described in greater detail with reference to the accompanying drawings in which:
Figure 1 is a longitudin~l section of purifying apparatus according to the present invention;
Figure 2 is an enlarged view of a portion of Figure 1 showing the drive-unit;
Figure 3 is a head-on view of the apparatus in the vicinity of the drive-unit;
Figure ~ is a cross-sectional view of the apparatus;
Figure 5 is an enlarged plan view of a detail of ~igure 1;
Figure 6 is an enlarged view of a portion of Figure 1 showing the suction-station;
Figure 7 is a plan view of the suction station of Figure 6.
i :~ 6~585 In Figure 1, the floating water-purification apparatus is referenced 1 in general. It consists of a support-structuer 2 which carries a water--jet pump 3 and double-walled pipe or conduit 4 ancl which is connected to a suction-station 5 resting upon the bottom of the kody of water 6.
Support-structure 2 comprises an upper tubular frame 7 and a lower tubular frame 8, both made of pairs of hollow tubes of the same diameter. The hollow tubes of lower frame 8are parallel and connected togetheT by transverse tubes 9. For the purpose oF forming a continuous air chamber, tubular frames 7, 8 are connected together by vertical tubes lO.
As may be gathered from Figures 2 and 3, among others, whereas the two parallel tubes of frame 8are connected together by transverse tubes 9, the two parallel tubes of upper tubular frame 7 are connected together by transverse braces 11, so that the entire apparatus 1 is in equilibrium. Frames 7, 8 are partitioned~ approximately centrally, by joints 14, thus producing sections 15, 16 ~Figure 5). Each section is fit~ed wi~h vent-valves 12, 12' and flooding valves 13, 13' (Figure 1) and each sec~ion of the combined frame 7, 8 may there-fore be flooded or evacuated simultaneously or at different ti~es.
Secured to upper tubular frame 7, by welding for example, are brackets for the support of a grating 1~ ~Figure 4). As shown in Figures 1 and 5, valves 12, 12', 13, 13' are easily accessible through the grating in the vicinity of junction 14~ if the valves need to be operated, or for maintenance purposes.
As shown in Figure 2, water-je~ pump 3 consists of a pump 20, prefer-ably an electrically driven motor 21, and a compressor 22. Air-suction pipe 23 enters between the said compressor and pump, through which the required oxygen or air is drawn in~o the jet of water. Fitted to free end 25 of air-suction pipe 23 is a silencer 24, the purpose of which is to reduce the a~.ount of noise made by air being drawn in. Pump 20, motor 21 and compressor 22 are arranged one ~ 7 -behind the other, thus producing a satisfactory weight distri~ution. Arranged in the vicinity of water-jet pump 3 and intercomlecting tubes 7 is a series oE
transverse tubes 9', 9" and 9"' for the purpose of distributing and equalizing the weight.
Floating water-purification apparatus 1 may easily be anchored in a predetermined position by securing to anchoring eyes 27, shown in Figure 3, cables secured to the shore or to weights.
Double-walled pipe or conduit 4 consists of an air permeable inner part 28 and an air impermeable outer part 32 as shown in Figures 3 and 4.
Inner part 28 is formed as a mesh with aplastic lining 30, so that air bubbles expelled by compressor 22 take some time to pass through the inner part and to collect upon corrugated outer part 32. This cor~lgation impedes the formation of large air bubbles rising quickly to surface 34 of the water. A comparison of Figures 3 and 4 shows that the cross-section formed by outer part 32 of the conduit increases towards the mouth 33 thereof, i.e. outer part 32 of the line slopes towards surface 34 of the water. Mouth 33 of outer part 32 of the line is pivotable, so that air bubbles arriving here may again be held up and be forced into the water.
The front portion of inner part 28 of the line is also pivotable in order to impart a specific direction to the flow of water. As may ~e gathered from Figure 1~ the front portion is directed towards the bottom of the body of water~ so that the oxygen-enriched flow of water is forced to flow along the bottom, ~hus displacing, or mixing with, the strata of water not yet enriched with oxygen. This optimizes the biological purifying effect.
Intake end 36 is connected by means of a hose line 35 to a suction station 5. It consists of a box-like housing 40 in which the inlet funnel con-nected to hose line 35 is arranged in such a manner that the opening thereof is ,.
5 ~ 5 directed towards surface 34 of the water. Housing 40, seated upon a platform 39 resting upon the bottom, encloses inlet funnel 38, so that the water is forced to enter the housing through platform 39, through a co~rse screen 41 and then through a fine screen 42, the coarse screen being spaced from housing 40 by sup-ports 43. It may be gathered from Figures 6 and 7 that suction station 5 pro-vides a relatively uniform flow of water, so that few contaminants reach the area between the two screens.
Claims (15)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Apparatus for purifying industrial service water, more particularly for regenerating polluted bodies of water, with the aid of a water-jet pump which discharges air, drawn in with the water through an air-suction pipe, into a screen-like conduit, both of which run jointly, for a certain distance below the surface of the water, characterized in that the conduit is of double-wall design and is arranged to slope towards the surface of the water, the inner part of the conduit being permeable to air, whereas the outer part thereof is impermeable to air; and in that the water-jet pump and the double-wall conduit are associated with a support-structure consisting of tubular frames having vent-valves and flooding valves.
2. Apparatus according to claim 1, characterized in that the inner part of the line is made of a fine-meshed net, or of a series of fine-meshed nets, the mesh of which increases towards the air impermeable outer part of the line.
3. Apparatus according to claim 1, characterized in that the tubular frames are partitioned into a plurality of corresponding sections.
4. Apparatus according to claim 3; characterized in that the sections each have vent-valves and flooding valves.
5. Apparatus according to any one of claims 1 to 3, characterized in that the tubular frames comprise an upper frame and a lower frame having bores inter-connected by vertical tubes, and in that the vent-valves are fitted to an upper tubular frame and the flooding valves to a lower tubular frame.
6. Apparatus according to claim 1 or 2, characterized in that the tubular frames comprise an upper frame and a lower frame having bores interconnected by vertical tubes, and in that the upper tubular frame comprises, in the vicinity of the water-jet pump, a plurality of transverse tubes of the same diameter as the tubes tubular frame.
7. Apparatus according to claim l, characterized in that the compressor, the pump and the motor, constituting the water-jet pump, are arranged axially one behind the other.
8. Apparatus according to claim l, characterized in that a silencer is fitted to the free end of the air-intake pipe.
9. Apparatus according to claims l and 3, characterized in that the tubular frames comprise an upper frame and a lower frame having bores intercon-nected by vertical tubes and in that the upper tubular frame has, in the vicinity of the joints between the sections, brackets carrying a grating.
10. Apparatus according to claim 1, characterized in that the suction end of the water-jet pump is connected, through a hose line, to a suction station located on the bottom of the body of water.
11. Apparatus according to claim l, characterized in that the suction sta-tion comprises an inlet funnel directed towards the surface of the water, the suction station being arranged in a box-like housing equipped with a vertically arranged coarse filter in front of a horizontally arranged fine screen.
12. Apparatus according to claim 1, characterized in that arranged in the body of water to be purified are several water-jet pumps and double-wall conduits in the support-structures of tubular frames, in such a manner that, in drawing-in and discharging the water, they communicate with each other, a water circula-tion being thus produced and maintained, if necessary, in the body of water.
13. Apparatus according to claim 1, characterized in that the front portion of the inner part of the line, serving as a flow duct, is arranged to pivot ver-tically.
14. Apparatus according to claim 1, characterized in that anchoring eyes arc fitted to the ends of the upper tubular frame.
15. Apparatus according to claim 1, characterized in that the mouth of the outer part of the line, serving as a cover, is adapted to pivot vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000383900A CA1164585A (en) | 1981-08-14 | 1981-08-14 | Floating water-purification apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000383900A CA1164585A (en) | 1981-08-14 | 1981-08-14 | Floating water-purification apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1164585A true CA1164585A (en) | 1984-03-27 |
Family
ID=4120699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000383900A Expired CA1164585A (en) | 1981-08-14 | 1981-08-14 | Floating water-purification apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1164585A (en) |
-
1981
- 1981-08-14 CA CA000383900A patent/CA1164585A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |