CA2967535A1 - Anti-extrusion hydrocyclone - Google Patents
Anti-extrusion hydrocyclone Download PDFInfo
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- CA2967535A1 CA2967535A1 CA2967535A CA2967535A CA2967535A1 CA 2967535 A1 CA2967535 A1 CA 2967535A1 CA 2967535 A CA2967535 A CA 2967535A CA 2967535 A CA2967535 A CA 2967535A CA 2967535 A1 CA2967535 A1 CA 2967535A1
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- Prior art keywords
- hydrocyclone
- tubing
- interior cavity
- inlet
- section
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
- B04C5/04—Tangential inlets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
- B04C5/13—Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Cyclones (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Glanulating (AREA)
Abstract
La présente invention concerne un hydrocyclone comprenant : - un corps (10) définissant une cavité intérieure creuse (11), ladite cavité intérieure creuse (11) présentant une portion supérieure de section cylindrique (110) prolongée par une portion inférieure de section tronconique (111), le diamètre de ladite section tronconique (111) diminuant en direction de la partie inférieur dudit corps (10); - une entrée (12) pour un mélange de liquide et de solides débouchant dans ladite portion cylindrique (110); une sortie de sousverse (13), pour l'évacuation desdits solides essentiellement séparés dudit liquide, communiquant avec l'extrémité inférieure de ladite cavité intérieure (11); - une sortie de surverse (15), pour l'évacuation dudit liquide essentiellement séparé desdits solides, communiquant avec l'extrémité supérieure de ladite cavité intérieure (11); dans lequel ladite sortie de sousverse (13) s'étend depuis l'extrémité inférieure de ladite portion inférieure de section tronconique (111) et présente une section tronconique dont le diamètre croît en direction de la partie inférieure dudit hydrocyclone.
Description
ANTI-EXTRUSION HYDROCYCLONE
1. Field of the invention The field of the invention is that of the designing and manufacture of hydrocyclones conventionally used in the effluent treatment sector to separate the liquid phase and the solid phase of a mixture.
1. Field of the invention The field of the invention is that of the designing and manufacture of hydrocyclones conventionally used in the effluent treatment sector to separate the liquid phase and the solid phase of a mixture.
2. Prior art Hydrocyclones are cornmonly used during the treatment of certain effluents in order to carry out a liquid-solid separation.
The present Applicant uses hydrocyclones when implementing for example its water-treatment process commercially distributed under the name Actifloe. These very same hydrocyclones are used in other methods for treating water or industrial effluents.
A water treatment method of the Actifloe type comprises a step of ballasted flocculation during winch the preliminarily coagulated and/or flocculated water is put into contact with ballast such as rnicrosand in order to speedily cause the focs that it contains to settle during a subsequent settling or sedimentation step.
This settling step leads to the production of at least partially treated water and a mixture of settled sludges and ballast.
To maintain the performance levels of such a treatment method, the ballast concentration must be kept essentially constant during the treatment.
To maintain performance levels while restricting ballast consumption and thus reducing operating costs, the ballast is recycled during treatment. To tins end, the mixture of sludges and ballast is conveyed towards a hydrocyclone within winch the solid phase formed by ballast is essentially separated from the liquid phase.
The mixture of liquid, sludges and ballast is introduced under pressure laterally into the body of the hydrocyclone winch has an internai cylindrical-truncated cone shape, the diameter of winch diminishes towards the underflow part of the cyclone. Under the effect of the feed pressure, a vortex is created within the interior cavity. This vortex tends to place the solid phase flat against the peripheral wall of the cavity. The solid phase then flows towards the underflow part of the hydrocyclone while the liquid phase rises towards the overflow outlet of the hydrocyclone.
A mixture of sand and a small quantity of liquid and sludges is extracted in an underflow in order to be at least partly recycled in order to reintroduce ballast in the method. A mixture of liquid, sludges and a small quantity of ballast is extracted in an overflow.
The implementation of such hydrocyclones enables efficient recovery of ballast so that it can be recycled in the method. Their implementation thus helps reduce ballast consumption as well as its inherent costs.
To ensure efficient separation of the liquid phase and solid phase in the mixture of water, sludges and ballast, tins mixture must be introduced into the hydrocyclone under high pressure, generally of the order of two bars. To Mis end, high-powered pumps need to be used. Such pumps are however energy-hungry devices.
Besides, current hydrocyclones are sensitive to fluctuations in the suspended motter (SM) concentration of the water to be treated. However, the SM load of water to be treated varies greatly over a year. During periods in winch the water to be treated has a high SM
concentration, the underflow outlet of tins hydrocyclone can tend to get ponding. The hydrocyclone then has difficulty discharging the mixture of sludges and ballast in the underflow:
tins phenomenon is called "clogging". A part of the sludges and ballast is then discharged in an over-flow with the treated water, inducing losses of ballast and a drop in the quality of the treated water.
The present Applicant uses hydrocyclones when implementing for example its water-treatment process commercially distributed under the name Actifloe. These very same hydrocyclones are used in other methods for treating water or industrial effluents.
A water treatment method of the Actifloe type comprises a step of ballasted flocculation during winch the preliminarily coagulated and/or flocculated water is put into contact with ballast such as rnicrosand in order to speedily cause the focs that it contains to settle during a subsequent settling or sedimentation step.
This settling step leads to the production of at least partially treated water and a mixture of settled sludges and ballast.
To maintain the performance levels of such a treatment method, the ballast concentration must be kept essentially constant during the treatment.
To maintain performance levels while restricting ballast consumption and thus reducing operating costs, the ballast is recycled during treatment. To tins end, the mixture of sludges and ballast is conveyed towards a hydrocyclone within winch the solid phase formed by ballast is essentially separated from the liquid phase.
The mixture of liquid, sludges and ballast is introduced under pressure laterally into the body of the hydrocyclone winch has an internai cylindrical-truncated cone shape, the diameter of winch diminishes towards the underflow part of the cyclone. Under the effect of the feed pressure, a vortex is created within the interior cavity. This vortex tends to place the solid phase flat against the peripheral wall of the cavity. The solid phase then flows towards the underflow part of the hydrocyclone while the liquid phase rises towards the overflow outlet of the hydrocyclone.
A mixture of sand and a small quantity of liquid and sludges is extracted in an underflow in order to be at least partly recycled in order to reintroduce ballast in the method. A mixture of liquid, sludges and a small quantity of ballast is extracted in an overflow.
The implementation of such hydrocyclones enables efficient recovery of ballast so that it can be recycled in the method. Their implementation thus helps reduce ballast consumption as well as its inherent costs.
To ensure efficient separation of the liquid phase and solid phase in the mixture of water, sludges and ballast, tins mixture must be introduced into the hydrocyclone under high pressure, generally of the order of two bars. To Mis end, high-powered pumps need to be used. Such pumps are however energy-hungry devices.
Besides, current hydrocyclones are sensitive to fluctuations in the suspended motter (SM) concentration of the water to be treated. However, the SM load of water to be treated varies greatly over a year. During periods in winch the water to be treated has a high SM
concentration, the underflow outlet of tins hydrocyclone can tend to get ponding. The hydrocyclone then has difficulty discharging the mixture of sludges and ballast in the underflow:
tins phenomenon is called "clogging". A part of the sludges and ballast is then discharged in an over-flow with the treated water, inducing losses of ballast and a drop in the quality of the treated water.
3. Goals of the invention The invention is aimed especially of providing an efficient solution to at least some of these different problems.
In particular, according to at least one embodiment, it is a goal of the invention to provide a hydrocyclone that shows low sensitivity to fluctuations in the SM
concentration of the effluent to be treated.
In particular, it is a goal of the invention, according to at least one embodiment, to provide a hydrocyclone of this kind that has low sensitivity to the clogging phenomenon.
It is another goal of the invention, in of least one embodiment, to provide a hydrocyclone of tins kind that induces low energy consumption, at least as compared with the prior-art hydrocyclones.
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In particular, according to at least one embodiment, it is a goal of the invention to provide a hydrocyclone that can work efficiently with a low feed pressure, at least as compared with the prior-art hydrocyclones.
It is another goal of the invention, in at least one embodiment, to provide a hydrocyclone of this kind that is reliable and/or robust and/or simple to design.
In particular, according to at least one embodiment, it is a goal of the invention to provide a hydrocyclone that shows low sensitivity to fluctuations in the SM
concentration of the effluent to be treated.
In particular, it is a goal of the invention, according to at least one embodiment, to provide a hydrocyclone of this kind that has low sensitivity to the clogging phenomenon.
It is another goal of the invention, in of least one embodiment, to provide a hydrocyclone of tins kind that induces low energy consumption, at least as compared with the prior-art hydrocyclones.
=
In particular, according to at least one embodiment, it is a goal of the invention to provide a hydrocyclone that can work efficiently with a low feed pressure, at least as compared with the prior-art hydrocyclones.
It is another goal of the invention, in at least one embodiment, to provide a hydrocyclone of this kind that is reliable and/or robust and/or simple to design.
4. Summary of the invention To tins end, the invention proposes a hydrocyclone comprising:
a body defining a hollow interior cavity, said hollow interior cavity having a upper portion with a cylindrical section extended by a lower portion with a truncated conical section, the diameter of said truncated conical section diminishing towards the lower part of said body;
an inlet for a mixture of liquids and solids leading into said cylindrical portion;
an underflow outlet for the discharge of said solids essentially separated from said liquid, communicating with the lower end of said interior cavity;
an overflow outlet for the discharge of said liquid essentially separated from said solids, conununicating with the upper end of said interior cavity;
wherein said underflow outlet extends from the lower end of said lower portion of truncated conical section and has a truncated conical section, the diameter of which increases towards the lower part of said hydrocyclone.
Thus, according to this aspect of the invention, the implementing of an underflow outlet with a truncated conical section, the diameter of which widens towards the bottom of the hydrocyclone, helps preserve the whirling motion of the fluid.
This helps foster the separation of the liquid and solid phases within the hydrocyclone and limits the phenomenon of congestion of the underflow outlet of the hydrocyclone. A hydrocyclone according to the invention is thus less sensitive to variations in SM concentration of the effluent to be treated.
This also reduces the feed pressure while preserving a high level of separation of the liquid phase and the solid phase in a mixture. Thus, the energy consumption is reduced along with the cost inherent in the implementing of liquid/solid separation by hydrocycloning.
According to one variant, the contour of said underflow outlet comprises at least one helical groove, the winding sense of which is identical to the winding sense (or circulation sense) of the liquid within said interior cavity.
The implementing of such a groove sustains the rotation of the fluid in the lower part of the hydrocyclone. This helps prevent the congestion of the underflow outlet of the hydrocyclone and helps make it less sensitive to variations in SM
concentration of the fluid to be treated.
According to one variant, said at least one groove is extended partly on the contour of said lower portion of said interior cavity.
This also sustains the rotation of the fluid in the lower part of the hydrocyclone and plays a part in preventing the congestion of the underflow outlet of the hydrocyclone and in making it less sensitive to variations in SM concentration of the effluent to be treated.
According to one variant, said helical groove forms a hollow.
This ensures efficient guiding of fluid within the hydrocyclone. In one variant, the groove could also form a protruding feature within the interior cavity.
According to one variant, the length of said underflow outlet is greater than three times the diameter of the junction between the truncated conical lower portion of the interior cavity and the underflow outlet of the hydrocyclone.
The length of said underflow will be preferably smaller than or equal to ten times the diameter of the junction between the truncated conical lower portion of the interior cavity and the underflow of the hydrocyclone.
A shorter length would limit the effect anticipated by the implementing of the truncated conical underflow outlet, namely improving the liquid/solid separation and making the hydrocyclone less sensitive to variations in SM concentration of the effluent to be treated while at the same time reducing the feed pressure. A length that is far too great would nevertheless lead to a major head loss.
According to one variant, the angle a of the truncated conical section of the underflow outlet relative to its axis of revolution ranges from 100 to 25 .
According to one variant said overflow outlet comprises a truncated conical tubing that extends in the prolongation of said cylindrical portion and has a diameter increasing in the direction of the upper part of said hydrocyclone.
This reduces the feed pressure and sustains the rotation of the fluid within the
a body defining a hollow interior cavity, said hollow interior cavity having a upper portion with a cylindrical section extended by a lower portion with a truncated conical section, the diameter of said truncated conical section diminishing towards the lower part of said body;
an inlet for a mixture of liquids and solids leading into said cylindrical portion;
an underflow outlet for the discharge of said solids essentially separated from said liquid, communicating with the lower end of said interior cavity;
an overflow outlet for the discharge of said liquid essentially separated from said solids, conununicating with the upper end of said interior cavity;
wherein said underflow outlet extends from the lower end of said lower portion of truncated conical section and has a truncated conical section, the diameter of which increases towards the lower part of said hydrocyclone.
Thus, according to this aspect of the invention, the implementing of an underflow outlet with a truncated conical section, the diameter of which widens towards the bottom of the hydrocyclone, helps preserve the whirling motion of the fluid.
This helps foster the separation of the liquid and solid phases within the hydrocyclone and limits the phenomenon of congestion of the underflow outlet of the hydrocyclone. A hydrocyclone according to the invention is thus less sensitive to variations in SM concentration of the effluent to be treated.
This also reduces the feed pressure while preserving a high level of separation of the liquid phase and the solid phase in a mixture. Thus, the energy consumption is reduced along with the cost inherent in the implementing of liquid/solid separation by hydrocycloning.
According to one variant, the contour of said underflow outlet comprises at least one helical groove, the winding sense of which is identical to the winding sense (or circulation sense) of the liquid within said interior cavity.
The implementing of such a groove sustains the rotation of the fluid in the lower part of the hydrocyclone. This helps prevent the congestion of the underflow outlet of the hydrocyclone and helps make it less sensitive to variations in SM
concentration of the fluid to be treated.
According to one variant, said at least one groove is extended partly on the contour of said lower portion of said interior cavity.
This also sustains the rotation of the fluid in the lower part of the hydrocyclone and plays a part in preventing the congestion of the underflow outlet of the hydrocyclone and in making it less sensitive to variations in SM concentration of the effluent to be treated.
According to one variant, said helical groove forms a hollow.
This ensures efficient guiding of fluid within the hydrocyclone. In one variant, the groove could also form a protruding feature within the interior cavity.
According to one variant, the length of said underflow outlet is greater than three times the diameter of the junction between the truncated conical lower portion of the interior cavity and the underflow outlet of the hydrocyclone.
The length of said underflow will be preferably smaller than or equal to ten times the diameter of the junction between the truncated conical lower portion of the interior cavity and the underflow of the hydrocyclone.
A shorter length would limit the effect anticipated by the implementing of the truncated conical underflow outlet, namely improving the liquid/solid separation and making the hydrocyclone less sensitive to variations in SM concentration of the effluent to be treated while at the same time reducing the feed pressure. A length that is far too great would nevertheless lead to a major head loss.
According to one variant, the angle a of the truncated conical section of the underflow outlet relative to its axis of revolution ranges from 100 to 25 .
According to one variant said overflow outlet comprises a truncated conical tubing that extends in the prolongation of said cylindrical portion and has a diameter increasing in the direction of the upper part of said hydrocyclone.
This reduces the feed pressure and sustains the rotation of the fluid within the
5 hydrocyclone.
According to one variant, said truncated conical tubing comprises an inlet that communicates with said interior cavity and an outlet that leads into a peripheral housing made in said body, said overflow outlet furthermore compiising a discharge tubing that extends laterally to said body, said discharge tubing comprising an inlet that communicates with said peripheral housing and an outlet that leads outside said body.
According to this variant, the overflow outlet of the hydrocyclone is of the spill-over type. Indeed, the liquid phase coming from the interior cavity spills over into the peripheral housing constituting a collecting box or case and flows from this box through the lateral discharge tubing. This preserves the anisotropy and hence the rotation of the spill-over at the overflow. The sludges have an anisotropic flow, i.e. this flow is different (in sense and speed) according to the location of the hydrocyclone where this flow is measured. This results especially from the rotational motion of the sludges inside the hydrocyclone and the nature of the sludges (layers that are flot perfectly homogeneous). If the discharge unit were to be different from a spill-over (for example a conduit) then the flow would be forced and would apply heavy stress to the vortex which it is sought to maintain. The spill-over box (collecting box of spill-over) typetherefore makes it possible not to apply stress to the flow.
According to one variant, the angle p of the truncated conical tubing of the overflow outlet relative to its axis of revolution ranges from 100 to 30 .
This makes it possible to obtain a low head loss for the overflow while maintaining the rotational motion.
According to one variant, said inlet comprises an inlet tubing that extends along a spiral about the longitudinal axis of said body.
This increases the speed of entry of the mixture into the interior cavity and increases the centrifugal effect. Conversely, for an equivalent level of centrifugal effect, the flow rate and the feed pressure can be reduced.
According to one variant, said truncated conical tubing comprises an inlet that communicates with said interior cavity and an outlet that leads into a peripheral housing made in said body, said overflow outlet furthermore compiising a discharge tubing that extends laterally to said body, said discharge tubing comprising an inlet that communicates with said peripheral housing and an outlet that leads outside said body.
According to this variant, the overflow outlet of the hydrocyclone is of the spill-over type. Indeed, the liquid phase coming from the interior cavity spills over into the peripheral housing constituting a collecting box or case and flows from this box through the lateral discharge tubing. This preserves the anisotropy and hence the rotation of the spill-over at the overflow. The sludges have an anisotropic flow, i.e. this flow is different (in sense and speed) according to the location of the hydrocyclone where this flow is measured. This results especially from the rotational motion of the sludges inside the hydrocyclone and the nature of the sludges (layers that are flot perfectly homogeneous). If the discharge unit were to be different from a spill-over (for example a conduit) then the flow would be forced and would apply heavy stress to the vortex which it is sought to maintain. The spill-over box (collecting box of spill-over) typetherefore makes it possible not to apply stress to the flow.
According to one variant, the angle p of the truncated conical tubing of the overflow outlet relative to its axis of revolution ranges from 100 to 30 .
This makes it possible to obtain a low head loss for the overflow while maintaining the rotational motion.
According to one variant, said inlet comprises an inlet tubing that extends along a spiral about the longitudinal axis of said body.
This increases the speed of entry of the mixture into the interior cavity and increases the centrifugal effect. Conversely, for an equivalent level of centrifugal effect, the flow rate and the feed pressure can be reduced.
6 According to one variant, said inlet tubing extends along said spiral on a length of 1/4 to 1/4 of one turn around said body.
This gives a high level of acceleration to the speed of the liquid/solid mixture and increases the centrifugal effect inside the hydrocyclone According to one variant, said inlet tubing extends inclinedly towards the bottom of said body.
This orients the mixture towards the underflow as soon as it enters the hydrocyclone.
Thus, the circulation of solids towards the lower part of the hydrocyclone is favored, and this reduces the feed pressure without harming the process of liquid/liquid separation.
According to one variant, the angle of tilt of said inlet tubing relative to a transversal axis of said body is smaller than or equal to 30 .
According to one variant, the connection of said inlet tubing to said cylindrical portion of said interior cavity is made tangentially.
This enables the mixture to be placed against the peripheral wall of the interior cavity as soon as it enters the hydrocyclone, improves the liquid/solid separation and reduces the feed pressure.
According to one variant, the section of said inlet tubing diminishes gradually towards said cylindrical portion.
This accelerates the flow of the mixture and plays a role in placing the mixture against the peripheral wall of the interior cavity as soon as it enters the hydrocyclone, improving the liquid/solid separation and reducing the feed pressure.
According to one variant, the greatest section of said inlet tubing ranges from 30% to 50% of the section of said cylindrical portion and the smallest section of said inlet tubing ranges from 20% to 30% of the section of said cylindrical portion.
According to one variant, said inlet tubing has a circular section, the connection of said inlet tubing to said cylindrical portion of said interior cavity being made elliptically.
This also plays a role in placing the mixture against the peripheral wall of the interior cavity as soon as it enters the hydrocyclone, improving the liquid/solid separation and reducing the feed pressure.
This gives a high level of acceleration to the speed of the liquid/solid mixture and increases the centrifugal effect inside the hydrocyclone According to one variant, said inlet tubing extends inclinedly towards the bottom of said body.
This orients the mixture towards the underflow as soon as it enters the hydrocyclone.
Thus, the circulation of solids towards the lower part of the hydrocyclone is favored, and this reduces the feed pressure without harming the process of liquid/liquid separation.
According to one variant, the angle of tilt of said inlet tubing relative to a transversal axis of said body is smaller than or equal to 30 .
According to one variant, the connection of said inlet tubing to said cylindrical portion of said interior cavity is made tangentially.
This enables the mixture to be placed against the peripheral wall of the interior cavity as soon as it enters the hydrocyclone, improves the liquid/solid separation and reduces the feed pressure.
According to one variant, the section of said inlet tubing diminishes gradually towards said cylindrical portion.
This accelerates the flow of the mixture and plays a role in placing the mixture against the peripheral wall of the interior cavity as soon as it enters the hydrocyclone, improving the liquid/solid separation and reducing the feed pressure.
According to one variant, the greatest section of said inlet tubing ranges from 30% to 50% of the section of said cylindrical portion and the smallest section of said inlet tubing ranges from 20% to 30% of the section of said cylindrical portion.
According to one variant, said inlet tubing has a circular section, the connection of said inlet tubing to said cylindrical portion of said interior cavity being made elliptically.
This also plays a role in placing the mixture against the peripheral wall of the interior cavity as soon as it enters the hydrocyclone, improving the liquid/solid separation and reducing the feed pressure.
7 According to one variant, the ratio between the small radius and the big radius of said elliptically shaped connection ranges from 1 to 2.
According to one variant, the passage from the circular section of said inlet tubing to the elliptical shape of the connection of this tubing with said cylindrical portion of the interior cavity is done gradually.
This reduces the feed pressure of the hydrocyclone.
According to one variant, the upper contour of said cylindrical portion of said interior cavity extends helically with a winding sense identical to the sense of circulation of liquid within said interior cavity.
This sustains the rotation of the fluid as soon as it enters the hydrocyclone, orients the flow towards the underflow outlet and eliminates the dead volume at the top of the cylindrical portion, and thus favors the separation of the liquid and solid phases inside the hydrocyclone and limits the phenomenon of congestion of the underflow outlet of the hydrocyclone. The hydrocyclone is thus less sensitive to the variations in SM concentration of the effluent to be treated. This also makes it possible to reduce the feed pressure of the hydrocyclone.
According to one variant, said upper contour of said cylindrical portion of said interior cavity extends helically from the top to the bottom of the elliptically shaped connection.
This maximizes the effects of the use of the upper contour of the helix-shaped of the interior cavity.
According to one variant, said hydrocyclone comprises means for injecting service water into said interior cavity at the junction between said lower portion with truncated conical section and said underflow outlet.
Such injection means can act as a fuse if, in an extreme case, the hydrocyclone were to be blocked.
5. List of figures Other features and advantages of the invention shah l appear from the following description, given by way of a simple illustratory and non-exhaustive example and from the appended drawings, of which:
Figure 1 illustrates a front view of a hydrocyclone according to the invention;
According to one variant, the passage from the circular section of said inlet tubing to the elliptical shape of the connection of this tubing with said cylindrical portion of the interior cavity is done gradually.
This reduces the feed pressure of the hydrocyclone.
According to one variant, the upper contour of said cylindrical portion of said interior cavity extends helically with a winding sense identical to the sense of circulation of liquid within said interior cavity.
This sustains the rotation of the fluid as soon as it enters the hydrocyclone, orients the flow towards the underflow outlet and eliminates the dead volume at the top of the cylindrical portion, and thus favors the separation of the liquid and solid phases inside the hydrocyclone and limits the phenomenon of congestion of the underflow outlet of the hydrocyclone. The hydrocyclone is thus less sensitive to the variations in SM concentration of the effluent to be treated. This also makes it possible to reduce the feed pressure of the hydrocyclone.
According to one variant, said upper contour of said cylindrical portion of said interior cavity extends helically from the top to the bottom of the elliptically shaped connection.
This maximizes the effects of the use of the upper contour of the helix-shaped of the interior cavity.
According to one variant, said hydrocyclone comprises means for injecting service water into said interior cavity at the junction between said lower portion with truncated conical section and said underflow outlet.
Such injection means can act as a fuse if, in an extreme case, the hydrocyclone were to be blocked.
5. List of figures Other features and advantages of the invention shah l appear from the following description, given by way of a simple illustratory and non-exhaustive example and from the appended drawings, of which:
Figure 1 illustrates a front view of a hydrocyclone according to the invention;
8 Figure 2 illustrates a view in section along a plane passing through the longitudinal axis of the hydrocyclone and the axis of the discharge tubing of a hydrocyclone according to the invention;
Figure 3 illustrates a partial schematic view of the inner contour of the inlet tubing and of the upper portion with cylindrical section according to the invention;
Figure 4 illustrates a schematic top view of the inlet tubing and of the upper portion with cylindrical section of a hydrocyclone according to the invention;
Figure 5 illustrates a top view of a hydrocyclone according to the invention, the upper part of which has been removed;
Figure 6 illustrates a transparence side view of the underflow outlet of a hydrocyclone according to the invention;
Figure 7 illustrates a front view of a variant of a hydrocyclone according to the invention, the inlet tube system of which is tilted.
6. Description of a particular embodiment 6.1. Architecture Referring to figures 1 to 7, we present an example of a hydrocyclone according to the invention.
Thus, as represented in these figures, such a hydrocyclone comprises a body 10 extending along a longitudinal axis. This body 10 comprises a hollow interior cavity 11.
This hollow interior cavity 11 comprises:
an upper portion 110 with a cylindrical section, and a lower portion 11 with a truncated cortical section, this portion with a truncated conical section being made in the extension of the cylindrical section towards the hottom of the hydrocyclone.
The truncated cortical section herein is the truncated portion of a cone of revolution. Its diameter tends to diminish towards the bottom of the hydrocyclone.
This hydrocyclone comprises an inlet 12 for a mixture of liquid and solid, for example a mixture of water, settled sludges and ballast.
This inlet 12 has an inlet tubing 120. This inlet tuning 120 has a circular section. The axis of tins inlet tubing 120 is tilted downwards relative to a transversal axis of the body of the
Figure 3 illustrates a partial schematic view of the inner contour of the inlet tubing and of the upper portion with cylindrical section according to the invention;
Figure 4 illustrates a schematic top view of the inlet tubing and of the upper portion with cylindrical section of a hydrocyclone according to the invention;
Figure 5 illustrates a top view of a hydrocyclone according to the invention, the upper part of which has been removed;
Figure 6 illustrates a transparence side view of the underflow outlet of a hydrocyclone according to the invention;
Figure 7 illustrates a front view of a variant of a hydrocyclone according to the invention, the inlet tube system of which is tilted.
6. Description of a particular embodiment 6.1. Architecture Referring to figures 1 to 7, we present an example of a hydrocyclone according to the invention.
Thus, as represented in these figures, such a hydrocyclone comprises a body 10 extending along a longitudinal axis. This body 10 comprises a hollow interior cavity 11.
This hollow interior cavity 11 comprises:
an upper portion 110 with a cylindrical section, and a lower portion 11 with a truncated cortical section, this portion with a truncated conical section being made in the extension of the cylindrical section towards the hottom of the hydrocyclone.
The truncated cortical section herein is the truncated portion of a cone of revolution. Its diameter tends to diminish towards the bottom of the hydrocyclone.
This hydrocyclone comprises an inlet 12 for a mixture of liquid and solid, for example a mixture of water, settled sludges and ballast.
This inlet 12 has an inlet tubing 120. This inlet tuning 120 has a circular section. The axis of tins inlet tubing 120 is tilted downwards relative to a transversal axis of the body of the
9 hydrocyclone, i.e. relative to an axis orthogonal to the longitudinal axis of the body 10, by an angle 13 smaller than or equal to 30 (cf. figure 7). The inlet of this inlet tubing 120 is thus higher than its outlet. In one variant, it can be that this inlet tubing is flot tilted (cf. figures 1 and 2). In this case, it will extend along an axis orthogonal to the longitudinal axis of the body 10.
The inlet tubing 120 forms a spiral about the longitudinal axis of the body
The inlet tubing 120 forms a spiral about the longitudinal axis of the body
10. This spiral extends over 'h to 3/4 of the periphery of the body 10.
The connection 17 of the inlet tubing 120 with the cylindrical portion 110 of the interior cavity 10 is donc tangentially.
The section of the inlet tubing 120 diminishes gradually towards the cylindrical portion 110.
The greatest section of the inlet tubing, i.e. the section of its inlet, ranges from 30% to 50% of the section of the cylindrical portion 110 and the smallest section of the inlet tubing 120 ranges from 20% to 30% of the section of the cylindrical portion 110.
The inlet tubing 120 has a circular section. Its connection to the cylindrical portion 110 of the interior cavity 10 is preferably donc elliptically. In other words, the connection 17 has the shape of an ellipse.
The ratio between the small radius and the large radius of the elliptically shaped connection 17 between the inlet tubing 120 and the cylindrical portion 110 ranges from 1 to 2.
The passage from the circular section of the inlet tubing 120 to the elliptical shape of the connection of this inlet tubing to the cylindrical portion 110 of the interior cavity 11 is donc gradually.
The upper contour 112 of the cylindrical portion 110 of the interior cavity 11 extends helically with a winding sense identical to the sense of circulation of the liquid inside the interior cavity 11, and does so preferably from the top 171 to the bottom 172 of the elliptical shaped connection 17 between the inlet tubing 120 and the cylindrical portion 110.
The hydrocyclone comprises an underflow outlet 13 for the discharge of solids essentially separated from the liquid of the mixture introduced into the hydrocyclone via the inlet tubing 120. This underflow 13 communicates with the lower end of the interior cavity 11, more specifically with the lower end of the truncated conical portion 111.
The underflow outlet 13 extends from the lower end of the lower truncated conical section portion 111. It has a truncated conical section 130, the diameter of which increases towards the lower part of the hydrocyclone. This truncated conical portion is in this embodiment a truncated cone of revolution. It opens into the exterior of the body 10.
The length L of the underflow 13 is greater than three times the diameter of the junction between the lower truncated conical portion of the interior cavity of the underflow outlet of the hydrocyclone. The angle a of the truncated conical portion 130 of the underflow outlet 13 relative to its longitudinal axis or axis of revolution ranges froml 0 to 25 .
The underflow outlet 13 comprises at least one helical groove 14, the winding sense of which is identical to the sense of circulation of the liquid inside the interior cavity 11, i.e.
of the mixture of liquid composed of solids and liquid that are introduced inside of the hydrocyclone. The number of grooves would preferably be an even number. This number could for example be equal to two or to four. The grooves will be distributed uniformly on the periphery of the truncated conical section 130 of the underflow outlet 13.
The groove or grooves will preferably be hollowed features made on the surface of the truncated conical section 30 of the underflow outlet 13. As an alternative, these features could be ridges on a surface of the truncated conical section of the underflow outlet, i.e. they could form an extra thickness inside the underflow outlet 13.
The groove or grooves 14 extend partly on the contour of the lower portion of the interior cavity.
The hydrocyclone comprises an overflow outlet 15 for the discharge of liquid essentially separated from the solids of the mixture introduced into the hydrocyclone via the inlet tubing. This overflow outlet communicates with the upper end of the interior cavity 11, more specifically with the upper end of the cylindrical upper portion 110.
The overflow outlet 15 comprises a truncated conical tubing 151 which extends in the prolongation of the cylindrical portion 110. Its diameter increases towards the upper portion of the hydrocyclone. In this embodiment, it constitutes a truncated cone of revolution.
The truncated conical tubing 151 of the overflow outlet 15 comprises an inlet which communicates with the interior cavity 11, in this case with its upper cylindrical
The connection 17 of the inlet tubing 120 with the cylindrical portion 110 of the interior cavity 10 is donc tangentially.
The section of the inlet tubing 120 diminishes gradually towards the cylindrical portion 110.
The greatest section of the inlet tubing, i.e. the section of its inlet, ranges from 30% to 50% of the section of the cylindrical portion 110 and the smallest section of the inlet tubing 120 ranges from 20% to 30% of the section of the cylindrical portion 110.
The inlet tubing 120 has a circular section. Its connection to the cylindrical portion 110 of the interior cavity 10 is preferably donc elliptically. In other words, the connection 17 has the shape of an ellipse.
The ratio between the small radius and the large radius of the elliptically shaped connection 17 between the inlet tubing 120 and the cylindrical portion 110 ranges from 1 to 2.
The passage from the circular section of the inlet tubing 120 to the elliptical shape of the connection of this inlet tubing to the cylindrical portion 110 of the interior cavity 11 is donc gradually.
The upper contour 112 of the cylindrical portion 110 of the interior cavity 11 extends helically with a winding sense identical to the sense of circulation of the liquid inside the interior cavity 11, and does so preferably from the top 171 to the bottom 172 of the elliptical shaped connection 17 between the inlet tubing 120 and the cylindrical portion 110.
The hydrocyclone comprises an underflow outlet 13 for the discharge of solids essentially separated from the liquid of the mixture introduced into the hydrocyclone via the inlet tubing 120. This underflow 13 communicates with the lower end of the interior cavity 11, more specifically with the lower end of the truncated conical portion 111.
The underflow outlet 13 extends from the lower end of the lower truncated conical section portion 111. It has a truncated conical section 130, the diameter of which increases towards the lower part of the hydrocyclone. This truncated conical portion is in this embodiment a truncated cone of revolution. It opens into the exterior of the body 10.
The length L of the underflow 13 is greater than three times the diameter of the junction between the lower truncated conical portion of the interior cavity of the underflow outlet of the hydrocyclone. The angle a of the truncated conical portion 130 of the underflow outlet 13 relative to its longitudinal axis or axis of revolution ranges froml 0 to 25 .
The underflow outlet 13 comprises at least one helical groove 14, the winding sense of which is identical to the sense of circulation of the liquid inside the interior cavity 11, i.e.
of the mixture of liquid composed of solids and liquid that are introduced inside of the hydrocyclone. The number of grooves would preferably be an even number. This number could for example be equal to two or to four. The grooves will be distributed uniformly on the periphery of the truncated conical section 130 of the underflow outlet 13.
The groove or grooves will preferably be hollowed features made on the surface of the truncated conical section 30 of the underflow outlet 13. As an alternative, these features could be ridges on a surface of the truncated conical section of the underflow outlet, i.e. they could form an extra thickness inside the underflow outlet 13.
The groove or grooves 14 extend partly on the contour of the lower portion of the interior cavity.
The hydrocyclone comprises an overflow outlet 15 for the discharge of liquid essentially separated from the solids of the mixture introduced into the hydrocyclone via the inlet tubing. This overflow outlet communicates with the upper end of the interior cavity 11, more specifically with the upper end of the cylindrical upper portion 110.
The overflow outlet 15 comprises a truncated conical tubing 151 which extends in the prolongation of the cylindrical portion 110. Its diameter increases towards the upper portion of the hydrocyclone. In this embodiment, it constitutes a truncated cone of revolution.
The truncated conical tubing 151 of the overflow outlet 15 comprises an inlet which communicates with the interior cavity 11, in this case with its upper cylindrical
11 portion 110 and an outlet 1511 which leads into a peripheral housing 16 made in the body 11. This peripheral housing is a collecting box. The overflow outlet 15 furthermore comprises a discharge tubing 152 which extends laterally to the body along an axis essentially orthogonal to the longitudinal axis of the body 10. This lateral discharge tubing 152 comprises an inlet 1521 which communicates with the peripheral housing 16 and an outlet 1522 which leads out of the body 10. The overflow outlet 15 is a spill-over outlet inasmuch as the liquid coming from the truncated conical tubing 151 spills over or runs off into the peripheral housing 16 and gets shed into the discharge tubing system 152.
The angle of the truncated conical tubing 151 of the overflow outlet relative to its longitudinal axis or axis of revolution ranges from 10'to30 .
In one variant, the hydrocyclone comprises means for injecting service water into the interior cavity, at the junction between the lower truncated conical portion and the underflow outlet. These injection means can for example include a service water injection pipe 60.
The fact of injecting service water at the junction between the truncated conical lower portion and the underflow outlet can act as a fuse if, in an extreme case, the hydrocyclone were to get clogged, and can thus enable it to be unclogged.
6.2. Operation A hydrocyclone according to the invention can conventionally be implemented to carry out the separation of a liquid phase and a solid phase of a mixture such as for example a mixture of water and settled or sedimentation sludges containing ballast.
To this end, such a mixture is introduced inside the hydrocyclone via the inlet tubing 120 under low pressure, preferably ranging from 0.3 to 1.5 bars.
Owing to the spiral shape of this inlet tubing, the fluid accelerates inside the inlet tubing and the centrifugai effect increases. On the contrary, for a same centrifugai effect, the feed flow rate and the head loss can be lower. It is thus possible to reduce the feed pressure.
Since the section of the inlet tubing diminishes, the fluid accelerates, thus producing the same effect as the one mentioned in the above paragraph. The centrifugai effect tends to place the solids flat against the external wall.
The angle of the truncated conical tubing 151 of the overflow outlet relative to its longitudinal axis or axis of revolution ranges from 10'to30 .
In one variant, the hydrocyclone comprises means for injecting service water into the interior cavity, at the junction between the lower truncated conical portion and the underflow outlet. These injection means can for example include a service water injection pipe 60.
The fact of injecting service water at the junction between the truncated conical lower portion and the underflow outlet can act as a fuse if, in an extreme case, the hydrocyclone were to get clogged, and can thus enable it to be unclogged.
6.2. Operation A hydrocyclone according to the invention can conventionally be implemented to carry out the separation of a liquid phase and a solid phase of a mixture such as for example a mixture of water and settled or sedimentation sludges containing ballast.
To this end, such a mixture is introduced inside the hydrocyclone via the inlet tubing 120 under low pressure, preferably ranging from 0.3 to 1.5 bars.
Owing to the spiral shape of this inlet tubing, the fluid accelerates inside the inlet tubing and the centrifugai effect increases. On the contrary, for a same centrifugai effect, the feed flow rate and the head loss can be lower. It is thus possible to reduce the feed pressure.
Since the section of the inlet tubing diminishes, the fluid accelerates, thus producing the same effect as the one mentioned in the above paragraph. The centrifugai effect tends to place the solids flat against the external wall.
12 The inlet tubing is tilted towards the underflow outlet of the hydrocyclone.
The fluid is thus oriented as soon as it enters the hydrocyclone in the sense of its flow inside the interior cavity 11 of the hydrocyclone. This also diminishes the feed pressure by avoiding the "dead volume" at the top of the interior cavity that would trap solid matter and harm the quality of the separation.
The fluid penetrates the cylindrical upper portion 110 by passing through the elliptically shaped connection between the inlet tubing 120 and the cylindrical upper section.
In addition, this connection is made tangentially to the inner peripheral contour of the cylindrical upper portion 110. Owing to the geometrical characteristics of this connection, the solids as well as the liquid remain placed flat near the inner wall of the lower cavity 11 as soon as they enter this cavity.
The fluid flows along the upper contour 112 of the cylindrical portion 110 of the interior cavity 11 which extends helically with a winding sense identical to the sense of circulation of the liquid inside the interior cavity 11, from the top to the bottom of the elliptically shaped connection between the inlet tubing 120 and the cylindrical portion 110.
This makes it possible to avoid the dead zones in the upper region of the cylindrical upper portion 110, convey the fluid that has to circulate towards the underflow outlet of the hydrocyclone and reduce the feed pressure.
The fluid continues to flow inside the interior cavity 11 in passing into the truncated conical lower portion 111. The solid phase then flows towards the underflow outlet 13 of the hydrocyclone while the liquid phase rises up to the overflow outlet 15 of the hydrocyclone.
The solid phase flows from the truncated conical lower section 111 towards the underflow 13. It flows along grooves 14 which extend on the peripheral contour of the lower region of the truncated conical section 111. The use of grooves 14 in this zone sustains the rotation of the fluid and reduces the sensitivity of the hydrocyclone to the SM load of the mixture introduced into it.
The solid part of the fluid flows inside the truncated conical section 130 of the underflow outlet 13. The use of an underflow with truncated conical section, the diameter of which widens towards the bottom, makes it possible to prevent induced flows, thus
The fluid is thus oriented as soon as it enters the hydrocyclone in the sense of its flow inside the interior cavity 11 of the hydrocyclone. This also diminishes the feed pressure by avoiding the "dead volume" at the top of the interior cavity that would trap solid matter and harm the quality of the separation.
The fluid penetrates the cylindrical upper portion 110 by passing through the elliptically shaped connection between the inlet tubing 120 and the cylindrical upper section.
In addition, this connection is made tangentially to the inner peripheral contour of the cylindrical upper portion 110. Owing to the geometrical characteristics of this connection, the solids as well as the liquid remain placed flat near the inner wall of the lower cavity 11 as soon as they enter this cavity.
The fluid flows along the upper contour 112 of the cylindrical portion 110 of the interior cavity 11 which extends helically with a winding sense identical to the sense of circulation of the liquid inside the interior cavity 11, from the top to the bottom of the elliptically shaped connection between the inlet tubing 120 and the cylindrical portion 110.
This makes it possible to avoid the dead zones in the upper region of the cylindrical upper portion 110, convey the fluid that has to circulate towards the underflow outlet of the hydrocyclone and reduce the feed pressure.
The fluid continues to flow inside the interior cavity 11 in passing into the truncated conical lower portion 111. The solid phase then flows towards the underflow outlet 13 of the hydrocyclone while the liquid phase rises up to the overflow outlet 15 of the hydrocyclone.
The solid phase flows from the truncated conical lower section 111 towards the underflow 13. It flows along grooves 14 which extend on the peripheral contour of the lower region of the truncated conical section 111. The use of grooves 14 in this zone sustains the rotation of the fluid and reduces the sensitivity of the hydrocyclone to the SM load of the mixture introduced into it.
The solid part of the fluid flows inside the truncated conical section 130 of the underflow outlet 13. The use of an underflow with truncated conical section, the diameter of which widens towards the bottom, makes it possible to prevent induced flows, thus
13 maintaining the rotation of the fluid inside the hydrocyclone. This diminishes the feed pressure.
The grooving 14 inside the truncated conical section 130 sustains the rotation of the fluid and consequently makes the hydrocyclone less sensitive to the variation of the SM load of the mixture introduced into it.
The liquid phase lises to the interior of the interior cavity 11 in passing from the truncated conical lower portion 111 to the cylindrical upper portion 110 then to the truncated conical tubing 151 of the overflow outlet 15.
The use of the truncated conical tubing 151, the diameter of which widens towards the top, preserves the anisotropy of the overflow. This maintains the rotation of the fluid. It also diminishes the feed pressure.
The liquid then runs off from the upper part of the truncated conical tubing 151 into the interior of the peripheral housing 16. It then flows from the peripheral housing 16 to the interior of the discharge tubing 152.
Since the liquid phase spills over from the truncated conical tubing 151 into the interior of the peripheral housing 16, it maintains a low and constant height of water in the overflow outlet, and thus does flot constrain the underflow.
6.3. Advantages The technique according to the invention facilitates the rotation of the fluid inside die hydrocyclone and preserves tins rotation by the implementation, independently or in combination, of:
- die inclined inlet tubing;
- the helica1 shape of the upper surface of the cylindrical upper portion;
the truncated section of the underflow;
of the truncated tubing of the overflow;
the discharge of the liquid phase by spill-over;
of the grooving inside the truncated conical section of the underflow;
- the grooving in the lower zone of the truncated conical lower portion of the interior cavity.
The grooving 14 inside the truncated conical section 130 sustains the rotation of the fluid and consequently makes the hydrocyclone less sensitive to the variation of the SM load of the mixture introduced into it.
The liquid phase lises to the interior of the interior cavity 11 in passing from the truncated conical lower portion 111 to the cylindrical upper portion 110 then to the truncated conical tubing 151 of the overflow outlet 15.
The use of the truncated conical tubing 151, the diameter of which widens towards the top, preserves the anisotropy of the overflow. This maintains the rotation of the fluid. It also diminishes the feed pressure.
The liquid then runs off from the upper part of the truncated conical tubing 151 into the interior of the peripheral housing 16. It then flows from the peripheral housing 16 to the interior of the discharge tubing 152.
Since the liquid phase spills over from the truncated conical tubing 151 into the interior of the peripheral housing 16, it maintains a low and constant height of water in the overflow outlet, and thus does flot constrain the underflow.
6.3. Advantages The technique according to the invention facilitates the rotation of the fluid inside die hydrocyclone and preserves tins rotation by the implementation, independently or in combination, of:
- die inclined inlet tubing;
- the helica1 shape of the upper surface of the cylindrical upper portion;
the truncated section of the underflow;
of the truncated tubing of the overflow;
the discharge of the liquid phase by spill-over;
of the grooving inside the truncated conical section of the underflow;
- the grooving in the lower zone of the truncated conical lower portion of the interior cavity.
14 Ail this takes part in favoring the separation of the liquid and solid phases inside the hydrocyclone and limits the phenomenon of congestion of the underflow of the hydrocyclone.
The technique according to the invention reduces the feed pressure of the hydrocyclone by the implementation of the following independently or in combination of:
the spiral-shaped inlet tubing;
the elliptically shaped and tangential connection between the inlet tubing and the cylindrical upper portion;
the reduction of the section of the inlet tubing towards the interior cavity;
the graduai change of shape from circular to elliptical between the inlet tubing and its connection to the interior cavity;
the tilt of the inlet tubing;
the helical shape of the upper surface of the cylindrical upper portion;
the truncated conical section of the underflow outlet;
the truncated conical tubing of the overflow outlet;
the discharge of the liquid phase by spill-over;
The technique according to the invention reduces the sensitivity of the hydrocyclone to changes in SM load of the mixture introduced inside it and thus limits the phenomenon of congestion of the underflow by the implementation, independently or in combination, of:
the grooving inside the truncated conical section of the underflow outlet;
the grooving in the lower zone of the truncated conical lower portion of the interior cavity;
the discharge of the liquid phase by spill-over.
The technique according to the invention reduces the feed pressure of the hydrocyclone by the implementation of the following independently or in combination of:
the spiral-shaped inlet tubing;
the elliptically shaped and tangential connection between the inlet tubing and the cylindrical upper portion;
the reduction of the section of the inlet tubing towards the interior cavity;
the graduai change of shape from circular to elliptical between the inlet tubing and its connection to the interior cavity;
the tilt of the inlet tubing;
the helical shape of the upper surface of the cylindrical upper portion;
the truncated conical section of the underflow outlet;
the truncated conical tubing of the overflow outlet;
the discharge of the liquid phase by spill-over;
The technique according to the invention reduces the sensitivity of the hydrocyclone to changes in SM load of the mixture introduced inside it and thus limits the phenomenon of congestion of the underflow by the implementation, independently or in combination, of:
the grooving inside the truncated conical section of the underflow outlet;
the grooving in the lower zone of the truncated conical lower portion of the interior cavity;
the discharge of the liquid phase by spill-over.
Claims (21)
1. Hydrocyclone comprising:
- a body (10) defining a hollow interior cavity (11), said hollow interior cavity (11) having an upper portion with a cylindrical section (110) extended by a lower portion with a truncated conical section (111), the diameter of said truncated conical section (111) diminishing towards the lower part of said body (10);
- an inlet (12) for a mixture of liquids and solids leading into said cylindrical portion (110);
- an underflow outlet (13) for the discharge of said solids essentially separated from said liquid, communicating with the lower end of said interior cavity (11);
- an overflow outlet (15) for the discharge of said liquid essentially separated from said solids, communicating with the upper end of said interior cavity (11);
wherein said underflow outlet (13) extends from the lower end of said lower portion of truncated conical section (111) and has a truncated conical section, the diameter of which increases towards the lower part of said hydrocyclone, characterized in that the contour of said underflow outlet (13) comprises at least one helical groove (14), of which the winding sense is identical to the winding sense of the liquid within said interior cavity (11).
- a body (10) defining a hollow interior cavity (11), said hollow interior cavity (11) having an upper portion with a cylindrical section (110) extended by a lower portion with a truncated conical section (111), the diameter of said truncated conical section (111) diminishing towards the lower part of said body (10);
- an inlet (12) for a mixture of liquids and solids leading into said cylindrical portion (110);
- an underflow outlet (13) for the discharge of said solids essentially separated from said liquid, communicating with the lower end of said interior cavity (11);
- an overflow outlet (15) for the discharge of said liquid essentially separated from said solids, communicating with the upper end of said interior cavity (11);
wherein said underflow outlet (13) extends from the lower end of said lower portion of truncated conical section (111) and has a truncated conical section, the diameter of which increases towards the lower part of said hydrocyclone, characterized in that the contour of said underflow outlet (13) comprises at least one helical groove (14), of which the winding sense is identical to the winding sense of the liquid within said interior cavity (11).
2. Hydrocyclone according to claim 1, wherein said at least one groove (14) is extended partly on the contour of said lower portion (111) of said interior cavity (11).
3. Hydrocyclone according to claim 1 or 2, wherein said helical groove (14) forms a hollow.
4. Hydrocyclone according to any one of the claims 1 to 3, wherein the length of said underflow outlet (13) is greater than three times the diameter of the junction between the truncated conical lower portion (111) of the interior cavity (11) and the underflow outlet (13) of the hydrocyclone.
5. Hydrocyclone according to any one of the claims 1 to 4, wherein the angle a of the truncated conical section (130) of the underflow outlet (13) relative to its axis of revolution ranges from 10° to 25°.
6. Hydrocyclone according to any one of the claims 1 to 5, wherein said overflow outlet (15) comprises a truncated conical tubing (151) that extends in the prolongation of said cylindrical portion (110) and that has a diameter increasing in the direction of the upper part of said hydrocyclone.
7. Hydrocyclone according to claim 6, wherein said truncated conical tubing (151) comprises an inlet (1511) that communicates with said interior cavity (11) and an outlet (1512) that leads into a peripheral housing (16) made in said body (10), said overflow outlet (15) furthermore comprising a discharge tubing (152) that extends laterally fo said body (10), said discharge tubing (152) comprising an inlet (1521) that communicates with said peripheral housing (16) and an outlet (1522) that leads outside said body (10).
8. Hydrocyclone according to claims 6 or 7, wherein the angle of the truncated conical tubing (151) of the overflow outlet (15) relative to its axis of revolution ranges from 10° to 30°.
9. Hydrocyclone according to any one of the claims 1 to 4, wherein said inlet (12) comprises an inlet tubing (120) that extends in a spiral about the longitudinal axis of said body (10).
10. Hydrocyclone according to claim 9, wherein said inlet tubing (120) extends along said spiral on a length of 1/4 to 3/4 of one turn around said body.
11. Hydrocyclone according to claim 9 or 10, wherein said inlet tubing (120) extends inclinedly towards the bottom of said body (10).
12. Hydrocyclone according to claim 11, wherein the angle of tilt p of said inlet tubing (120) relative to a transversal axis of said body (10) is smaller than or equal to 30°.
13. Hydrocyclone according to any one of the claims 9 to 12, wherein the connection of said inlet tubing (120) to said cylindrical portion (110) of said interior cavity (11) is made tangentially.
14. Hydrocyclone according to any one of the claims 9 to 13, wherein the section of said inlet tubing (120) diminishes gradually towards said cylindrical portion (11).
15. Hydrocyclone according to claim 14, wherein the greatest section of said inlet tubing (120) ranges from 30% to 50% of the section of said cylindrical portion (110) and the smallest section of said inlet tubing (120) ranges from 20% to 30% of the section of said cylindrical portion (110).
16. Hydrocyclone according to any one of the claims 9 to 15 wherein said inlet tubing (120) has a circular section, the connection (17) of said inlet tubing (120) to said cylindrical portion (110) of said interior cavity (11) being made elliptically.
17. Hydrocyclone according to claim 16, wherein the ratio between the small radius and the big radius of said elliptically shaped connection (17) ranges from 1 to 2.
18. Hydrocyclone according to any one of the claims 14 to 17, wherein the passage from the circular section of said inlet tubing (120) to the elliptical shape of the connection (17) of this tubing with said cylindrical portion (110) of the interior cavity (11) is done gradually.
19. Hydrocyclone according to any one of the claims 9 to 18 wherein the upper contour (112) of said cylindrical portion (110) of said interior cavity (11) extends helically with a winding sense identical to the sense of circulation of the liquid within said interior cavity (11).
20. Hydrocyclone according to claim 19, wherein said upper contour (112) of said cylindrical portion (110) of said interior cavity (11) extends helically from the top (171) to the bottom (172) of the elliptically shaped connection (17).
21. Hydrocyclone according to any one of the claims 1 to 20, comprising means (60) for injecting service water into said interior cavity (11), at the junction between said lower portion with truncated conical section (111) and said underflow outlet (13).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1461630 | 2014-11-28 | ||
| FR1461630A FR3029192A1 (fr) | 2014-11-28 | 2014-11-28 | Hydrocyclone anti-boudinage. |
| PCT/EP2015/077967 WO2016083603A1 (fr) | 2014-11-28 | 2015-11-27 | Hydrocyclone anti-boudinage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2967535A1 true CA2967535A1 (fr) | 2016-06-02 |
Family
ID=52450425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2967535A Abandoned CA2967535A1 (fr) | 2014-11-28 | 2015-11-27 | Anti-extrusion hydrocyclone |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US20170312764A1 (fr) |
| EP (1) | EP3223957A1 (fr) |
| JP (1) | JP2017535419A (fr) |
| KR (1) | KR20170087894A (fr) |
| CN (1) | CN107107077A (fr) |
| AU (1) | AU2015352424A1 (fr) |
| BR (1) | BR112017010986A2 (fr) |
| CA (1) | CA2967535A1 (fr) |
| FR (1) | FR3029192A1 (fr) |
| MA (1) | MA41015A (fr) |
| MX (1) | MX2017006680A (fr) |
| RU (1) | RU2017122415A (fr) |
| SG (1) | SG11201704223YA (fr) |
| TN (1) | TN2017000189A1 (fr) |
| UA (1) | UA117073C2 (fr) |
| WO (1) | WO2016083603A1 (fr) |
| ZA (1) | ZA201703235B (fr) |
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| CN115569415A (zh) * | 2022-09-29 | 2023-01-06 | 汕头市潮阳区广业练江生态环境有限公司 | 一种闭式压力旋流沉砂器 |
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| USD857071S1 (en) * | 2017-01-24 | 2019-08-20 | Superior Industries, Inc. | Hydrocyclone inlet head |
| USD828422S1 (en) * | 2017-01-24 | 2018-09-11 | Superior Industries, Inc. | Hydrocyclone inlet head |
| BE1024631B9 (nl) * | 2016-10-11 | 2019-05-13 | Atlas Copco Airpower Nv | Vloeistofafscheider |
| CN106621468A (zh) * | 2017-02-20 | 2017-05-10 | 福建龙净环保股份有限公司 | 一种漩涡式灰水浓淡分离装置 |
| JP2018176309A (ja) * | 2017-04-05 | 2018-11-15 | ブラザー工業株式会社 | 工具洗浄装置 |
| EP3666640A1 (fr) * | 2018-12-14 | 2020-06-17 | ABB Schweiz AG | Dispositif de traitement de l'eau |
| CN112984635A (zh) * | 2019-12-13 | 2021-06-18 | 广东美的制冷设备有限公司 | 空气净化模块及空调室内机 |
| CN115867703A (zh) * | 2020-07-03 | 2023-03-28 | 维美德技术有限公司 | 具有改进的流体注入构件的水力旋流器 |
| CN114433371B (zh) * | 2020-11-05 | 2024-03-22 | 广东美的白色家电技术创新中心有限公司 | 一种旋流分离器 |
| CN115608527A (zh) * | 2022-08-06 | 2023-01-17 | 江苏大学流体机械温岭研究院 | 一种带有螺旋沟槽减阻结构的固液旋流分离器 |
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| CN102389864A (zh) * | 2011-09-19 | 2012-03-28 | 黄山 | 新型底流水流可调旋流器 |
| CN103639076A (zh) * | 2013-12-04 | 2014-03-19 | 烟台宜陶矿业有限公司 | 一种旋转器沉沙口自动疏通装置 |
| CN104014413B (zh) * | 2014-05-07 | 2016-04-06 | 江苏大学 | 一种封闭式的粉碎物料收集装置及收集方法 |
-
2014
- 2014-11-28 FR FR1461630A patent/FR3029192A1/fr active Pending
-
2015
- 2015-11-26 MA MA041015A patent/MA41015A/fr unknown
- 2015-11-27 KR KR1020177014427A patent/KR20170087894A/ko unknown
- 2015-11-27 US US15/531,023 patent/US20170312764A1/en not_active Abandoned
- 2015-11-27 WO PCT/EP2015/077967 patent/WO2016083603A1/fr active Application Filing
- 2015-11-27 UA UAA201705165A patent/UA117073C2/uk unknown
- 2015-11-27 CN CN201580071247.5A patent/CN107107077A/zh active Pending
- 2015-11-27 SG SG11201704223YA patent/SG11201704223YA/en unknown
- 2015-11-27 JP JP2017528194A patent/JP2017535419A/ja active Pending
- 2015-11-27 RU RU2017122415A patent/RU2017122415A/ru unknown
- 2015-11-27 AU AU2015352424A patent/AU2015352424A1/en not_active Abandoned
- 2015-11-27 EP EP15805419.7A patent/EP3223957A1/fr not_active Withdrawn
- 2015-11-27 BR BR112017010986A patent/BR112017010986A2/pt not_active Application Discontinuation
- 2015-11-27 MX MX2017006680A patent/MX2017006680A/es unknown
- 2015-11-27 CA CA2967535A patent/CA2967535A1/fr not_active Abandoned
- 2015-11-27 TN TN2017000189A patent/TN2017000189A1/fr unknown
-
2017
- 2017-05-10 ZA ZA2017/03235A patent/ZA201703235B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115569415A (zh) * | 2022-09-29 | 2023-01-06 | 汕头市潮阳区广业练江生态环境有限公司 | 一种闭式压力旋流沉砂器 |
Also Published As
| Publication number | Publication date |
|---|---|
| MA41015A (fr) | 2017-10-03 |
| ZA201703235B (en) | 2018-05-30 |
| SG11201704223YA (en) | 2017-06-29 |
| FR3029192A1 (fr) | 2016-06-03 |
| UA117073C2 (uk) | 2018-06-11 |
| RU2017122415A (ru) | 2018-12-29 |
| BR112017010986A2 (pt) | 2018-02-14 |
| AU2015352424A1 (en) | 2017-06-08 |
| TN2017000189A1 (fr) | 2018-10-19 |
| WO2016083603A1 (fr) | 2016-06-02 |
| MX2017006680A (es) | 2017-10-04 |
| US20170312764A1 (en) | 2017-11-02 |
| JP2017535419A (ja) | 2017-11-30 |
| CN107107077A (zh) | 2017-08-29 |
| EP3223957A1 (fr) | 2017-10-04 |
| KR20170087894A (ko) | 2017-07-31 |
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| Date | Code | Title | Description |
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| FZDE | Discontinued |
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