EP1134323A2 - Trappe de sable - Google Patents

Trappe de sable Download PDF

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Publication number
EP1134323A2
EP1134323A2 EP01106213A EP01106213A EP1134323A2 EP 1134323 A2 EP1134323 A2 EP 1134323A2 EP 01106213 A EP01106213 A EP 01106213A EP 01106213 A EP01106213 A EP 01106213A EP 1134323 A2 EP1134323 A2 EP 1134323A2
Authority
EP
European Patent Office
Prior art keywords
sand
trap system
sand trap
floating
shield
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.)
Withdrawn
Application number
EP01106213A
Other languages
German (de)
English (en)
Other versions
EP1134323A3 (fr
Inventor
Hans-Hugo Adelhütte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oms Klaranlagen GmbH
Original Assignee
Oms Klaranlagen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oms Klaranlagen GmbH filed Critical Oms Klaranlagen GmbH
Publication of EP1134323A2 publication Critical patent/EP1134323A2/fr
Publication of EP1134323A3 publication Critical patent/EP1134323A3/fr
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates

Definitions

  • the present invention relates to a sand trap for sewage treatment plants. Under a sand trap becomes a structure or a mechanical device for separating and removing sand and similar mineral solids from wastewater understood.
  • the wastewater fed to the sewage treatment plants usually contains mineral as well as organic Fabrics.
  • mineral ingredients are those that flow into the sewage system Sands, but also ash and glass.
  • These inorganic substances can adversely affect operational safety of sewage treatment plants and sludge treatment facilities. For example, occurs increased wear in sludge centrifuges. Pipelines and Sliders block when too much sand has accumulated in the system, causing unwanted Business interruptions are caused.
  • Sand trap systems are therefore usually the actual settling tank upstream of a sewage treatment plant. In the sand trap systems are - under Exploitation of the gravitational pull on the solid particles - generally specifically heavier, mineral components separated from the lighter organic components.
  • the inclined floor surfaces are particularly advantageous for sand traps because the sand traps them Sedimented walls and then the sand or the deposited grains on the inclined wall in Direction of the cone tip. This is essentially achieved by the fact that through a suitable arrangement of the inlet, the water flows over the sloping wall.
  • the Waste water is usually fed tangentially to the basin. After flowing through a circumferential angle the water enters the drain at a temperature of over 180 °.
  • the present invention is therefore based on the object of providing a sand trap system, which, despite its compact design, has the largest possible storage volume, d. H. a large surface with a flat design and the associated long residence times of the mixed water in the sand trap and thus an effective separation of sand and other mineral solids causes, the sand trap should be inexpensive to manufacture.
  • the depth of such a round sand trap can be significantly reduced. Due to the new geometric design, the sand does not collect like conventional ones Circular sand traps in a single, deepest point, but essentially sits in one annular downward tapering gutter (sand collecting space), which is the central one Bulge surrounds.
  • the circular sand trap does not necessarily have to be perfectly circular. Much more it is also possible, for example, to make the round sand trap oval.
  • the circular shape is preferred, however, because the bottom of the channel is then, for example, with a central one Shaft-mounted scraper can be moved to transport sand to a discharge point.
  • the cylinder basin does not necessarily have to be cylindrical.
  • the outer walls can also be slightly inclined.
  • the conical surface of the inner arch advantageously chosen such that they have an angle ( ⁇ ) of between about the horizontal 25 ° and approximately 55 °, preferably between approximately 30 ° and approximately 45 ° and particularly preferably approximately Includes 40 °. This ensures that the deposited sand quickly in the narrow floor area the tapered trough (sand collecting space) can slide off.
  • a particularly preferred embodiment of the sand trap system according to the invention provides that the bottom of the basin is a radially outer, substantially horizontal extending circular ring.
  • the bottom of the basin is a radially outer, substantially horizontal extending circular ring.
  • the conical inner curvature of the bottom does not necessarily have to start directly on the circular ring. It is therefore also possible to provide a hollow cylinder on the inside of the annulus, on which the conical Inner vault connects. As a result, the inner cone is offset slightly upwards, so that the sand collecting space receives an approximately rectangular cross section.
  • the width of this circular ring is between 10 and 40%, preferably between 20 and 35%, particularly preferably about 30% of the pelvic radius.
  • the depth of the basin is at least 40%, preferably at least 50% of the Basin diameter. Due to the particularly preferred geometry, the sedimentation rate of mineral ingredients significantly increased.
  • the inlet is preferably arranged such that the water is approximately tangential in the pool to be led. This creates a circular flow in the sand trap, sedimenting it the sand. The sand that gets into the inner area slides on the outer wall or the Cone wall down into the collecting trough. The wastewater cleaned from sand flows after one Flow distance of preferably at least about 360 ° over a threshold or through a dip tube from.
  • the threshold is preferably arranged higher than the inlet.
  • the (discharge) threshold is adjustable in height. This can the fill level in the round sand trap can be varied as required.
  • the threshold is preferably one Baffle in front so that no floating substances get into the drain.
  • the sand trap If the sand trap is used as intended, it settles on the underside of the pool the mineral sand. From time to time, therefore, the cleaning of the sand channel or the deduction of the sand necessary.
  • At least one clearing device is therefore preferably provided, which is located inside the basin is arranged near the bottom and is intended to form the deposited sand Transport sand discharge opening. This can while the sand trap system is working the deposited mineral sand along the circular channel to the sand discharge opening be moved.
  • a pump or a screw conveyor arranged, which discharges the sand from the sand trap.
  • An expedient embodiment of the present invention provides that the clearing device is attached to a substantially centrally located vertical shaft so that it can move the clearing device only has to rotate the shaft about its own axis.
  • the clearing device is designed in such a way that if it is moved in one direction, it transports the deposited sand, and if it is moved in the other direction, whirls up the deposited sand so that it is washed becomes.
  • the space device can e.g. B. designed to one side as a kind of plow or ramp through which the sand is lifted and swirled, while the other side is one vertical plate or other catching device through which the sand essentially only is transported in the longitudinal direction of the channel. This is also possible, for example, through a clearing device in the form of a pointed shoe or a hollow half pyramid.
  • the tip whirls the sand in the water so that it passes through the surrounding water is cleaned. If the shoe is moved in the other direction, it will Sand caught in the shoe and can therefore be reliably transported to the sand discharge opening.
  • the quality of the sand can be significantly increased by the integrated washing device. This is particularly advantageous if the sand is not stored in a landfill should be, but should be further used.
  • the raised or whirled up sand can expediently be used be guided via an aerator unit or a wash water unit.
  • a sand trap system which additionally has a fat trap device is particularly preferred. This makes it possible to remove both sand and fat from the wastewater. When arranging of fat trapping, however, care must be taken that the fat trapping does not adversely affect the sand separation affects.
  • the device for separating floating substances preferably consists of a Float removal shield and a funnel, the inlet of the funnel at the level of the working level of the basin is arranged and the floating space shield can be moved relative to the funnel is.
  • the floating space shield can thus be moved over the surface of the water be that floating substances are "stripped" from the water surface and into the funnel be transported.
  • the funnel exit is usually connected to a pump or conveyor system, which float in appropriate processing plants or at appropriate Deposits transported.
  • the float clearing shield is particularly preferably arranged such that it is essentially one vertically arranged shaft, which preferably runs approximately in the middle of the basin, is rotatably mounted.
  • Part of the float shield should preferably be below and another part above the water level (working height). This ensures that on the one hand the floating substances with the help of the floating space shield effectively be transported on the water surface and secondly that the floating substances do not have the float blade can slide away.
  • the funnel inlet of the device for separating floating substances has a ramp, via which can move the float shield to the funnel.
  • the floating space shield moves in a radial direction around the vertical shaft, so there may be any floating substances effectively move along the water surface.
  • the clearing device and the floating clearing shield driven by the same vertically arranged shaft, which also the clearing device for Drives floating materials. This makes it possible to use both the device with the same drive to remove floating materials as well as the clearing devices.
  • the floating material separator is advantageously arranged essentially in the center of the round sand trap. He is preferably from a calming cylinder or a baffle, which or which is slotted in the lower part or equipped with slats. This creates in Center of round sand fishing a calm area. In this can be the fats and others Floating substances reach the surface more easily.
  • the wastewater is used outdoors of the pelvis fed substantially tangentially, d. H. but that also the floating substances first swirled with the wastewater to be fed outdoors.
  • the sand trap is created in combination with the circular flow, which Due to the arrangement of the inlet and outlet, a cylindrical flow is created. The floating substances are gripped by this current and carried away.
  • a further preferred embodiment provides a stripping device for stripping the inside inclined pool wall in front. This can be done for example by the arm, which the Connects the clearing device or the dozer blade to the central shaft. For example led directly along the pool floor, so with actuation of the clearing device at the same time cleaned the inner wall of the pool.
  • this stripping device but also be constructed completely independently of the clearing device.
  • a special embodiment provides that a ventilation device in the sand trap system is provided.
  • This ventilation device can be used in the circular sand trap essential cylindrical flow are generated, which separates mineral and organic matter. This flow also prevents the deposition of rotten substances in the sand. When dosing the air to be introduced, however, care must be taken care must be taken that the sand retention in the sand trap system is not impaired too much.
  • the ventilation device is preferably arranged such that it in is able to supply air substantially in the vicinity of the cylindrical outer wall.
  • an annular ventilation device is provided which is capable of air feed several, offset in the circumferential direction.
  • the ventilation device does not necessarily have to be operated with (compressed) air. Much more it is also possible with a suitable arrangement of nozzles, preferably water instead of air Industrial water, e.g. B. purified wastewater to be introduced into the basin through the aeration device.
  • the task of the ventilation device is therefore primarily less in the ventilation of the Sewage, but rather in the production of a cylindrical flow.
  • FIG. 1 and 3 is a sectional drawing and a plan view of a first embodiment shown the sand trap system according to the invention. It can be clearly seen that the pelvis 1 is essentially cylindrical.
  • the floor 2 consists of a horizontal Annular ring 4 and a substantially conically curved section 3 a vertically extending rotatable shaft 8, a floating space shield 6 is arranged, the forms a float cleaner together with the funnel 7.
  • the float blade 6 is rotatably supported about the horizontal axis 9 and biased such that it has no effects external forces is perpendicular to the water surface.
  • the opening of the funnel 7 is located at the working height A of the sand trap. The working height is determined by the height of the spout 18 determined.
  • the filled water is made up of organic and mineral components as well as floating substances together. If the shaft 8 is rotated, the floating space shield will graze 6 over the water surface and transports the floating materials in the direction of the funnel 7. A ramp is attached to the funnel inlet. Comes the float shield 6 with the Ramp in contact, the buoyancy shield 6 tilts due to the through the ramp force applied to the float shield around the axis 9. Possibly existing Floating substances are conveyed through the floating substance clearing plate over the ramp of the funnel up to Funnel opening transported so that the floating materials are transported into the funnel 7 and can be discharged via a transport pump 13. The float scraper shield grazes along the funnel ramp.
  • the flotation lamellae are arranged parallel to one another and extend axially Direction down into the pool.
  • the slats form one Lamellar ring with a radius between approximately between 40 and 75% of the pelvic radius.
  • the slats are preferably, as can be seen in Figure 1, surrounded by a partition 19, which is in the axial Dip into the direction of the pool.
  • the partition 19 does not reach the floor; the partition 19 therefore has approximately the shape of a hollow cylinder and extends in the axial direction in a length of about 40 to 80% of the working height.
  • the floating space shield 6 extends in this embodiment also not to the edge of the pool, but only to the edge of the partition.
  • a clearing device 10 which is preferably the floating clearing shield 6 diametrically opposite.
  • the clearing device 10 runs on the bottom of the Basin essentially in the circular horizontal section of the bottom.
  • Figure 3 is the special shape of the clearing device can be seen particularly well. It essentially has that Shape of a hollow half-cone or a half-funnel or a hollow half-pyramid.
  • the clearing device in Figure 3 If the clearing device in Figure 3 is moved counterclockwise, it may be on the Sand deposited on the bottom was taken up through the funnel opening and along the bottom of the pool transported until the sand discharge opening is reached in the vicinity of the sand feed pump 14. The sand collected in the funnel then falls into the sand discharge opening and can be used with suitable ones Discharge devices are withdrawn from the basin.
  • the tapering one acts (Half) funnel or cone shape as a plow or ramp and the sand is through the cone surfaces the clearing device whirled up so that it is washed or of any adhering organic Ingredients are exempted.
  • the dozer blade has one Aerator unit 20, which can add air to the raised sand, so that the cleaning of the sand is done even more thoroughly.
  • the sand is heavily contaminated with organic ingredients, it can Sand is first washed by moving the clearing device clockwise. To the washing process, the direction of rotation of the clearing device can be changed so that now the washed sand is transported to the sand discharge opening or the sand feed pump 14 and is withdrawn from the pool.
  • the hopper 7 has ramps on both sides, so that Float in both directions of rotation of the shaft 8 is transported via the ramps into the hopper 7 become.
  • a ventilation device on the inside of the outer wall of the cylindrical basin 11 provided.
  • This has a plurality of openings 12 in the circumferential direction. If necessary, it is possible to introduce 12 air into the basin through the ventilation openings, so that due to the Ascending air creates a substantially cylindrical flow within the basin. This flow additionally prevents digestible ingredients from accumulating on the pool walls or deposit in the sand collecting room.
  • the flow conditions in the sand trap are marked by arrows.
  • the waste water is through the line 17 introduced into the basin.
  • the line 17 is arranged such that the inflowing Water in the sand trap causes a counter-clockwise radial flow.
  • the wastewater in the basin passes through a circumferential angle of at least almost 360 °.
  • the waste water goes through a full revolution in the pool has, at least some of the water can exit the basin via the overflow 18.
  • the Flow speed of the water in the sand trap system must not be too high, so that in the the mineral ingredients on the inwardly curved conical bottom wall can settle and transported along the inclined surface to the outer gutter become.
  • Figures 2 and 4 show a second embodiment of the present invention. It makes a difference differs from the first embodiment only in that instead of the sand feed pump a sand classifier 16 is provided.
  • the sand classifier at least partially finds one Separation of the mineral and organic components of those separated in the sand trap Solids and a drainage of the sand trap instead.
  • the sand classifier separates the solids in two different partitions, which are mainly characterized by particle size and particle density differentiate. One part has a higher proportion of organic components. This part of solids is returned to the clarification process.
  • a sand classifier the quality of the sand is significantly improved, the desanding performance of the However, sand trap is reduced. It must therefore be decided individually depending on the area of application whether a sand classifier is beneficial or not.
  • the sand trap system according to the invention has a relatively large surface area with a low overall height on. It is therefore advantageous to use a device for the separation of floating matter, which is due to the large surface area can realize a large floating material separation area.
  • a device for the separation of floating matter which is due to the large surface area can realize a large floating material separation area.
  • the pool is preferably made of stainless steel, but it can also be made of other materials, such as B. made of reinforced concrete.
  • the pool is either placed on the floor or built into a pit.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP01106213A 2000-03-14 2001-03-14 Trappe de sable Withdrawn EP1134323A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2000112379 DE10012379A1 (de) 2000-03-14 2000-03-14 Sandfanganlage
DE10012379 2000-03-14

Publications (2)

Publication Number Publication Date
EP1134323A2 true EP1134323A2 (fr) 2001-09-19
EP1134323A3 EP1134323A3 (fr) 2003-01-29

Family

ID=7634672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01106213A Withdrawn EP1134323A3 (fr) 2000-03-14 2001-03-14 Trappe de sable

Country Status (2)

Country Link
EP (1) EP1134323A3 (fr)
DE (2) DE10012379A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10151498A1 (de) * 2001-10-18 2003-04-30 Werkstoff & Funktion Grimmel W Sandfang
US7438808B2 (en) 2001-10-18 2008-10-21 Werkstoff & Funktion Grimmel Wassertechnik Gmbh Sand catcher
WO2020077131A1 (fr) * 2018-10-10 2020-04-16 3D Renewables, LLC Systèmes et procédés automatisés de traitement zéro déchet
CN114632354A (zh) * 2022-03-22 2022-06-17 西南石油大学 一种模块化可调式泵站泵吸流道沉沙装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2027902T3 (pl) 2007-08-22 2014-08-29 Swantje Mignon Schlederer Zbiornik sedymentacyjny dla oczyszczalni ścieków

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE510060C (de) * 1930-10-15 Kurt Stock Dipl Ing Klaerbehaelter mit Schlammrinnen
US3919090A (en) * 1974-09-11 1975-11-11 Ecodyne Corp Surface skimming system
EP0363049A1 (fr) * 1988-10-07 1990-04-11 Hydro International Limited Séparateur
FR2693922A1 (fr) * 1992-07-23 1994-01-28 Tarting Philippe Flottateur cylindrique de séparation des matières en suspension contenues dans un liquide.
US5340469A (en) * 1990-07-26 1994-08-23 Unitog Rental Services, Inc. Apparatus for removal of fat, oil and grease from laundry wash water
US5534163A (en) * 1995-06-23 1996-07-09 Westvaco Corporation Center column extension for a clarifier
EP0804955A1 (fr) * 1996-04-30 1997-11-05 OMS KLÄRANLAGEN GmbH Bassin de décantation

Family Cites Families (10)

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DE546334C (de) * 1927-06-22 1932-03-11 Franz Leiner Dr Ing Klaeranlage zur biologischen Reinigung von Abwasser
AT211237B (de) * 1959-05-30 1960-09-26 Purator Klaeranlagen Grosshand Klärgerinne für Absetzanlagen
DE1484831C3 (de) * 1964-04-30 1975-11-20 Maschinenfabrik Hellmut Geiger, 7500 Karlsruhe Rundsandfang
DE7021679U (de) * 1970-06-10 1975-09-11 Neumann Hans Guenter Dipl-Chem Absetztrichter zur verbesserung der schwerkraftabscheidung bei der trennung fest-fluessiger phasengemische.
DE2028441A1 (de) * 1970-06-10 1973-03-01 Hans Guenter Dipl Chem Neumann Absetzen von festen stoffen aus einem aus festen und fluessigen stoffen bestehenden gemisch mittels schwerkraft
DE8020329U1 (de) * 1980-07-29 1982-07-08 Buckau-Walther AG, 4048 Grevenbroich Vorrichtung zum waschen von schuettgut
NZ197894A (en) * 1980-08-11 1985-07-12 Hydro Int Ltd Vortex separator for sewage treatment;conical flow modifier in solids outlet
GB2158741B (en) * 1984-05-14 1988-08-17 Hydro Int Ltd Separation of components of a fluid mixture
GB2223957B (en) * 1988-10-07 1992-08-12 Hydro Int Ltd Separator
DE3837789A1 (de) * 1988-11-08 1990-05-10 Theodor Dr Ing Merkle Kreisfoermiger sandfang fuer kleinere und mittlere wasserkraftanlagen mit tangentialem zulauf und zentripetalem abzug des reinwassers (zyklon-sandfang)

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE510060C (de) * 1930-10-15 Kurt Stock Dipl Ing Klaerbehaelter mit Schlammrinnen
US3919090A (en) * 1974-09-11 1975-11-11 Ecodyne Corp Surface skimming system
EP0363049A1 (fr) * 1988-10-07 1990-04-11 Hydro International Limited Séparateur
US5340469A (en) * 1990-07-26 1994-08-23 Unitog Rental Services, Inc. Apparatus for removal of fat, oil and grease from laundry wash water
FR2693922A1 (fr) * 1992-07-23 1994-01-28 Tarting Philippe Flottateur cylindrique de séparation des matières en suspension contenues dans un liquide.
US5534163A (en) * 1995-06-23 1996-07-09 Westvaco Corporation Center column extension for a clarifier
EP0804955A1 (fr) * 1996-04-30 1997-11-05 OMS KLÄRANLAGEN GmbH Bassin de décantation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10151498A1 (de) * 2001-10-18 2003-04-30 Werkstoff & Funktion Grimmel W Sandfang
US7438808B2 (en) 2001-10-18 2008-10-21 Werkstoff & Funktion Grimmel Wassertechnik Gmbh Sand catcher
WO2020077131A1 (fr) * 2018-10-10 2020-04-16 3D Renewables, LLC Systèmes et procédés automatisés de traitement zéro déchet
US11739016B2 (en) 2018-10-10 2023-08-29 3D Renewables, LLC Automated zero waste systems and methods
CN114632354A (zh) * 2022-03-22 2022-06-17 西南石油大学 一种模块化可调式泵站泵吸流道沉沙装置
CN114632354B (zh) * 2022-03-22 2023-05-26 西南石油大学 一种模块化可调式泵站泵吸流道沉沙装置

Also Published As

Publication number Publication date
DE10012379A1 (de) 2001-09-20
DE20018715U1 (de) 2001-01-25
EP1134323A3 (fr) 2003-01-29

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