CA2150335A1 - Cleaning device for sand, having a distributor for suspended substances - Google Patents
Cleaning device for sand, having a distributor for suspended substancesInfo
- Publication number
- CA2150335A1 CA2150335A1 CA002150335A CA2150335A CA2150335A1 CA 2150335 A1 CA2150335 A1 CA 2150335A1 CA 002150335 A CA002150335 A CA 002150335A CA 2150335 A CA2150335 A CA 2150335A CA 2150335 A1 CA2150335 A1 CA 2150335A1
- Authority
- CA
- Canada
- Prior art keywords
- container
- laminae
- struts
- distributor
- sand
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0018—Separation of suspended solid particles from liquids by sedimentation provided with a pump mounted in or on a settling tank
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0045—Plurality of essentially parallel plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2433—Discharge mechanisms for floating particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2433—Discharge mechanisms for floating particles
- B01D21/2438—Discharge mechanisms for floating particles provided with scrapers on the liquid surface for removing floating particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/245—Discharge mechanisms for the sediments
- B01D21/2461—Positive-displacement pumps; Screw feeders; Trough conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
In a cleaning device for sand, comprising a container which has an inlet for a water/sand suspension and a pure water outlet, as well as laminae arranged in the container, said laminae having wavy convex and concave areas, and a screw conveyor in the bottom of the container, the invention proposes a distributor for suspended substances rising from the container bottom, whereby the distributor has a number of openings for the suspended substances and is situated between the screw conveyor and the laminae.
Description
21~0335 "Cleaning Device for Sand having a Distributor for Suspended Substances"
The invention concerns a cleaning device according to the preamble of claim 1.
A cleaning device of this type is known, for example, from DE
40 27 879 Al.
As a result of increasingly greater contamination of the soil, on the one hand, and increasingly higher demands for cleanliness of processed sands, on the other hand, it is the object of the invention to improve a conventional device of this type so that the efficiency of separation for the sediment is optimized in spite of a good separation efficiency for suspended substances.
This object forming the basis of the invention is solved by the construction of a cleaning device as per the characterizing features of claim 1.
In other words, the invention proposes a distributor which is arranged below the laminae. In this way, suspended substances rising from the bottom of the container, which produce a vertically upward flow, are uniformly distributed over the entire surface below the laminae, on the one hand, and, on the other hand, the distributor represents a flow resistance for these suspended substances, so that the rate of flow is reduced.
Since there is an essentially horizontal flow, directed from inlet to outlet, throughout the cleaning container and since this flow is to be as laminar and smooth as possible, the abatement of the flow which is vertical to this main flow through suspended substances brings about an improved separation efficiency for the sediment.
Advantageously, the size of the openings in the distributor can be adjusted, so that the mode of operation of the distributor can be adapted to the ambient parameters, e.g. to different degrees of contamination or types of contamination of the sand or to various gas bubble sizes, if the suspended substances rise attached to gas bubbles.
A construction of the distributor which is adjustable in said manner can be easily attained by a number of struts which are staggered vis-à-vis one another in several planes and can be set toward one another, so that, on the whole, the spaces between the struts can be of various sizes and accordingly represent different flow resistances for the suspended substances.
To prevent the openings of the distributor from becoming clogged by the sediment over time, the upper sides of the struts can advantageously be in the shape of a cupola or in the shape of a roof, so that the sediment does not accumulate on the curved or diagonal surfaces but, at the latest starting at a specific size, slide along the upper side of the struts and sink to the container bottom.
Further advantageous embodiments of the invention can be found in the subclaims.
An example of an embodiment of the invention shall be 21~033~
described in greater detail below with reference to the drawings, showing ig. 1 a schematic arrangement of a cleaning device according to the invention, ig. 2 a lateral view onto the inlet end of the cleaning device, ig. 3 a front view onto the outlet end of the device of Fig. 1, ig. 4 a top view onto the device according to Fig. 1 and Fig. 5 a section along the line A - A in Fig. 4.
Fig. 1 shows an installation which is used for cleaning sand, e.g. from debris. The sand is first conveyed to a preliminary container 1 and suspended there in water. A stirrer 2 serves to maintain the sand in the suspension and whirl it. The whirling, as well as the discharge of volatile impurities, can be promoted by the introduction of gas, e.g. air, which can be introduced into the water/sand suspension through the base of the preliminary container 1 via schematically shown aeration openings 3.
The air/water mixture is removed from the preliminary container 1 via an outlet 4 and conveyed to a cleaning device 5 which is constructed according to the invention.
The outlet 4 is connected to the waste water inlet of a container 6 in which laminae 7, disposed vertically and having horizontally extending flow channels, i.e. with horizontally extending convex areas and concave areas, are arranged. The laminae 7 extend over almost the entire distance between the waste water inlet and the pure water outlet, whereby the laminae run in direction of flow of the water.
Dependent on the packing density of the laminae and the rate of flow of the water, the great length of the laminae 7 produces a laminar turbulent-free flow of the water, at the latest in the rear area of the laminae 7, in which suspended substances can rise unimpeded on the one hand and, on the other hand, sediment of low specific weight can also settle without hindrance. Due to the wavy-shaped laminae 7, a multitude of settling surfaces are created on the whole for sinking substances and, in this way, very short settling paths, so that a sinking and settling of even the smallest sediment on the laminae is promoted even when the rate of sedimentation is slow compared to the rate of flow of the water. This sediment can agglomerate with other very small particles on said laminae and then finally sink downward to the bottom of the container.
Rising impurities can be removed in a known manner per se via a scraper 8 which turns about two axes of rotation 9, separate from one another, and has a number of scraping edges 10 to pick up floating impurities.
In a variation of the illustrated embodiment, the laminae 7 can also be made of several lamellar packs arranged behind one another in direction of flow of the water. In this case, the different lamellar packs can have various diagonal laminae or laminae with various convex and concave areas. In this way, the laminae can be optimally adapted to the rate of sedimentation of particles of different grain diameters in the various flow zones of the container 6 and, on the whole, enable maximum separation of sand from the waste water.
5033~
Settling substances accumulate in the area of the container bottom in a conveyor channel 11 which extends over the entire length of the container 6 and in which a screw conveyor 12 is disposed. The screw conveyor 12 serves to convey resultant sediment out of the container 6. Furthermore, it causes a mechanical swirling motion of the sediment. In this way, the sediment is washed by the surrounding water on the one hand and, on the other hand, scoured and rubbed due to the friction between them and the friction with structural parts of the container 6, as a result of which adhering impurities are mechanically removed from the sand grains.
In Fig. 1 as well as in Fig. 2, schematically shown aerating jets 14 can be seen in the deepest area of the conveyor channel 11, through which the air or another suitable gas can be blown into the conveyor channel 11. In this case, the gas can be injected in the form of micro bubbles or coarser bubbles and results in a third form of treatment of the sediment in the container bottom: The gas bubbles pick up the already detached impurities between the sand grains and convey them upward, in between the laminae 7, where these impurities can be removed by the scraper 8.
Advantageously, the aerating jets 14 cna be provided over the entire length of the conveyor channel 11, whereby it can be advantageous to control the aerating jets 14 in groups or individually, in order not to blow upon specific areas of the conveyor channel 12. In this way, especially smooth flow conditions can be created between the laminae where desired.
In a variation of the embodiment shown, the aerating jets can not only blow from below but also, for example, laterally into the conveyor channel 11 or, if there is no conveyor channel ~i~0~35 11, into the corresponding zone of the container bottom.
A distributor 15 is provided between the conveyor channel 11 and laminae 7 for the rising gas bubbles and impurities. On the one hand, the distributor 15 is to ensure that the rising substances are evenly distributed over the cross-section of the container and, on the other hand, to slow down the rate of ascent of these substances in order to thus make flow conditions as smooth as possible between the laminae 7.
The distributor 15 consists of a number of individual struts 16 which are arranged in two planes above one another, whereby each plane is formed by a number of struts 16 arranged at a distance from one another. The struts 16 each have the same distance from one another within the two planes. The two planes are, however, staggered vis-à-vis one another, resulting, on the whole, in S-shaped wound openings for the substances rising in the distributor 15.
Advantageously, the struts 16 of one of the two planes of the distributor 15 can be mounted so as to be vertically adjustable, so that, on the whole, the one plane can be brought closer to the other plane of the distributor 15 or further removed from this other plane. In this way, the free cross-sections of flow between the struts 16 of distributor 15 can be enlarged or reduced in order to influence the flow-braking effect of the distributor 15, e.g. to adapt to the size of the injected air bubbles.
In the embodiment shown, the struts 16 are illustrated with a round cross-section. A curved or roof-shaped or diagonal upper side of the struts 16 is advantageous, so that sediment which sinks from the laminae 7 to the bottom of the container 21~33~
-is deposited to a minimal degree on the struts 16. Due to the described construction of the upper side of the struts 16, the structurally provided effect of the distributor 15 is maintained at an optimum without being affected by deposits.
Partially cleaned water can be removed through a return pipe 17 at the end of the container 6 and be conveyed with aid of a pump 18, via a standpipe 19, into a feed pipe 20.
Connections 21 are provided both in the standpipe 19 and in the feed pipe 20, whereby gases and/or chemicals, e.g.
flocculants, can be introduced into the water through connections 21. The water thus treated is then returned to container 6 from feed pipe 20; due to the fact that a portion of the water quantity can be circulated and treated again, the cleaning effect of the entire installation and, in particular, cleaning device S can be increased.
The invention concerns a cleaning device according to the preamble of claim 1.
A cleaning device of this type is known, for example, from DE
40 27 879 Al.
As a result of increasingly greater contamination of the soil, on the one hand, and increasingly higher demands for cleanliness of processed sands, on the other hand, it is the object of the invention to improve a conventional device of this type so that the efficiency of separation for the sediment is optimized in spite of a good separation efficiency for suspended substances.
This object forming the basis of the invention is solved by the construction of a cleaning device as per the characterizing features of claim 1.
In other words, the invention proposes a distributor which is arranged below the laminae. In this way, suspended substances rising from the bottom of the container, which produce a vertically upward flow, are uniformly distributed over the entire surface below the laminae, on the one hand, and, on the other hand, the distributor represents a flow resistance for these suspended substances, so that the rate of flow is reduced.
Since there is an essentially horizontal flow, directed from inlet to outlet, throughout the cleaning container and since this flow is to be as laminar and smooth as possible, the abatement of the flow which is vertical to this main flow through suspended substances brings about an improved separation efficiency for the sediment.
Advantageously, the size of the openings in the distributor can be adjusted, so that the mode of operation of the distributor can be adapted to the ambient parameters, e.g. to different degrees of contamination or types of contamination of the sand or to various gas bubble sizes, if the suspended substances rise attached to gas bubbles.
A construction of the distributor which is adjustable in said manner can be easily attained by a number of struts which are staggered vis-à-vis one another in several planes and can be set toward one another, so that, on the whole, the spaces between the struts can be of various sizes and accordingly represent different flow resistances for the suspended substances.
To prevent the openings of the distributor from becoming clogged by the sediment over time, the upper sides of the struts can advantageously be in the shape of a cupola or in the shape of a roof, so that the sediment does not accumulate on the curved or diagonal surfaces but, at the latest starting at a specific size, slide along the upper side of the struts and sink to the container bottom.
Further advantageous embodiments of the invention can be found in the subclaims.
An example of an embodiment of the invention shall be 21~033~
described in greater detail below with reference to the drawings, showing ig. 1 a schematic arrangement of a cleaning device according to the invention, ig. 2 a lateral view onto the inlet end of the cleaning device, ig. 3 a front view onto the outlet end of the device of Fig. 1, ig. 4 a top view onto the device according to Fig. 1 and Fig. 5 a section along the line A - A in Fig. 4.
Fig. 1 shows an installation which is used for cleaning sand, e.g. from debris. The sand is first conveyed to a preliminary container 1 and suspended there in water. A stirrer 2 serves to maintain the sand in the suspension and whirl it. The whirling, as well as the discharge of volatile impurities, can be promoted by the introduction of gas, e.g. air, which can be introduced into the water/sand suspension through the base of the preliminary container 1 via schematically shown aeration openings 3.
The air/water mixture is removed from the preliminary container 1 via an outlet 4 and conveyed to a cleaning device 5 which is constructed according to the invention.
The outlet 4 is connected to the waste water inlet of a container 6 in which laminae 7, disposed vertically and having horizontally extending flow channels, i.e. with horizontally extending convex areas and concave areas, are arranged. The laminae 7 extend over almost the entire distance between the waste water inlet and the pure water outlet, whereby the laminae run in direction of flow of the water.
Dependent on the packing density of the laminae and the rate of flow of the water, the great length of the laminae 7 produces a laminar turbulent-free flow of the water, at the latest in the rear area of the laminae 7, in which suspended substances can rise unimpeded on the one hand and, on the other hand, sediment of low specific weight can also settle without hindrance. Due to the wavy-shaped laminae 7, a multitude of settling surfaces are created on the whole for sinking substances and, in this way, very short settling paths, so that a sinking and settling of even the smallest sediment on the laminae is promoted even when the rate of sedimentation is slow compared to the rate of flow of the water. This sediment can agglomerate with other very small particles on said laminae and then finally sink downward to the bottom of the container.
Rising impurities can be removed in a known manner per se via a scraper 8 which turns about two axes of rotation 9, separate from one another, and has a number of scraping edges 10 to pick up floating impurities.
In a variation of the illustrated embodiment, the laminae 7 can also be made of several lamellar packs arranged behind one another in direction of flow of the water. In this case, the different lamellar packs can have various diagonal laminae or laminae with various convex and concave areas. In this way, the laminae can be optimally adapted to the rate of sedimentation of particles of different grain diameters in the various flow zones of the container 6 and, on the whole, enable maximum separation of sand from the waste water.
5033~
Settling substances accumulate in the area of the container bottom in a conveyor channel 11 which extends over the entire length of the container 6 and in which a screw conveyor 12 is disposed. The screw conveyor 12 serves to convey resultant sediment out of the container 6. Furthermore, it causes a mechanical swirling motion of the sediment. In this way, the sediment is washed by the surrounding water on the one hand and, on the other hand, scoured and rubbed due to the friction between them and the friction with structural parts of the container 6, as a result of which adhering impurities are mechanically removed from the sand grains.
In Fig. 1 as well as in Fig. 2, schematically shown aerating jets 14 can be seen in the deepest area of the conveyor channel 11, through which the air or another suitable gas can be blown into the conveyor channel 11. In this case, the gas can be injected in the form of micro bubbles or coarser bubbles and results in a third form of treatment of the sediment in the container bottom: The gas bubbles pick up the already detached impurities between the sand grains and convey them upward, in between the laminae 7, where these impurities can be removed by the scraper 8.
Advantageously, the aerating jets 14 cna be provided over the entire length of the conveyor channel 11, whereby it can be advantageous to control the aerating jets 14 in groups or individually, in order not to blow upon specific areas of the conveyor channel 12. In this way, especially smooth flow conditions can be created between the laminae where desired.
In a variation of the embodiment shown, the aerating jets can not only blow from below but also, for example, laterally into the conveyor channel 11 or, if there is no conveyor channel ~i~0~35 11, into the corresponding zone of the container bottom.
A distributor 15 is provided between the conveyor channel 11 and laminae 7 for the rising gas bubbles and impurities. On the one hand, the distributor 15 is to ensure that the rising substances are evenly distributed over the cross-section of the container and, on the other hand, to slow down the rate of ascent of these substances in order to thus make flow conditions as smooth as possible between the laminae 7.
The distributor 15 consists of a number of individual struts 16 which are arranged in two planes above one another, whereby each plane is formed by a number of struts 16 arranged at a distance from one another. The struts 16 each have the same distance from one another within the two planes. The two planes are, however, staggered vis-à-vis one another, resulting, on the whole, in S-shaped wound openings for the substances rising in the distributor 15.
Advantageously, the struts 16 of one of the two planes of the distributor 15 can be mounted so as to be vertically adjustable, so that, on the whole, the one plane can be brought closer to the other plane of the distributor 15 or further removed from this other plane. In this way, the free cross-sections of flow between the struts 16 of distributor 15 can be enlarged or reduced in order to influence the flow-braking effect of the distributor 15, e.g. to adapt to the size of the injected air bubbles.
In the embodiment shown, the struts 16 are illustrated with a round cross-section. A curved or roof-shaped or diagonal upper side of the struts 16 is advantageous, so that sediment which sinks from the laminae 7 to the bottom of the container 21~33~
-is deposited to a minimal degree on the struts 16. Due to the described construction of the upper side of the struts 16, the structurally provided effect of the distributor 15 is maintained at an optimum without being affected by deposits.
Partially cleaned water can be removed through a return pipe 17 at the end of the container 6 and be conveyed with aid of a pump 18, via a standpipe 19, into a feed pipe 20.
Connections 21 are provided both in the standpipe 19 and in the feed pipe 20, whereby gases and/or chemicals, e.g.
flocculants, can be introduced into the water through connections 21. The water thus treated is then returned to container 6 from feed pipe 20; due to the fact that a portion of the water quantity can be circulated and treated again, the cleaning effect of the entire installation and, in particular, cleaning device S can be increased.
Claims (9)
1. Cleaning device for sand, comprising a container which has an inlet for a water/sand suspension and a pure water outlet, as well as laminae having wavy convex and concave areas arranged in the container and a screw conveyor in the bottom of the container, characterized by a distributor (15) for suspended substances rising from the bottom of the container, whereby the distributor (15) has a number of openings for the suspended substances and is situated between the screw conveyor (12) and the laminae (7).
2. Device according to claim 1, characterized therein that the size of the openings can be adjusted.
3. Device according to claim 2, characterized by rows of struts (16) arranged above one another in two or more planes, whereby the struts (16) of each plane are disposed at a distance from one another and whereby the struts (16) of adjacent planes are staggered vis-à-vis one another and whereby the struts (16) of at least one row are fixed so as to be vertically adjustable.
4. Device according to one of the claims 1 to 3, characterized therein that the upper side of the struts (16) is made in the shape of a cupola or in the shape of a roof.
5. Cleaning device according to one of the preceding claims, characterized therein that aerating jets (14) are disposed in the area of the screw conveyor (12) for introducing gas into the sediment.
6. Device according to claim 5, characterized therein that the aerating jets (14) open into a conveyor channel (11) in which the screw conveyor (12) is situated.
7. Device according to one of the preceding claims, characterized therein that the laminae (7) extend from the inlet to the outlet in direction of the flow of water and essentially extend over the entire distance in the container (6) between inlet and outlet.
8. Device according to claim 7, characterized therein that the laminae (7) are arranged essentially vertically, whereby the convex and/or concave areas are horizontal.
9. Device according to claim 7, characterized therein that several lamellar packs with different inclinations or various convex and concave areas are disposed behind one another over the length of the container.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4418759A DE4418759A1 (en) | 1994-05-28 | 1994-05-28 | Cleaning device for sand, with a distributor for suspended matter |
| DEP4418759.9 | 1994-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2150335A1 true CA2150335A1 (en) | 1995-11-29 |
Family
ID=6519271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002150335A Abandoned CA2150335A1 (en) | 1994-05-28 | 1995-05-26 | Cleaning device for sand, having a distributor for suspended substances |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0684078A1 (en) |
| JP (1) | JPH0838928A (en) |
| CA (1) | CA2150335A1 (en) |
| DE (1) | DE4418759A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070075024A1 (en) * | 2005-10-04 | 2007-04-05 | Campbell Brian W | Advanced gravity sedimentation system and method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2551623A1 (en) * | 1975-11-18 | 1977-06-02 | Wilms Gmbh | Oblique clarifier for solid matter in fluids - esp. for sewage, separating flow into two streams |
| DE3336980A1 (en) * | 1983-10-11 | 1985-04-18 | Sloman Neptun Schiffahrts AG, 2800 Bremen | Process and apparatus for cleaning solid particles contaminated by hydrocarbons and, in particular, oil or derivatives thereof |
| IT1187616B (en) * | 1985-12-19 | 1987-12-23 | Daneco Danieli Ecologia Spa | INERT SEPARATOR AND INERT SEPARATION SYSTEM ADOPTING THIS DEVICE |
| DE3824295A1 (en) * | 1988-07-18 | 1990-01-25 | Preussag Ag Bauwesen | CLARIFYING DEVICE |
| DE4027879A1 (en) * | 1990-09-03 | 1992-03-12 | Pack Systems Internatioal K | Impurity sepn. device for contaminated water - comprises 2nd set of upper inclined collecting plates in flocculation and sedimentation tank for smooth sediment removal, for high density |
-
1994
- 1994-05-28 DE DE4418759A patent/DE4418759A1/en not_active Withdrawn
-
1995
- 1995-04-28 EP EP95106405A patent/EP0684078A1/en not_active Withdrawn
- 1995-05-09 JP JP7110731A patent/JPH0838928A/en active Pending
- 1995-05-26 CA CA002150335A patent/CA2150335A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0838928A (en) | 1996-02-13 |
| DE4418759A1 (en) | 1995-11-30 |
| EP0684078A1 (en) | 1995-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |