FR2940987A1 - Solids i.e. sand, trapping device for degritting element to convey e.g. charged water pipe, has opening formed in bottom of trough to permit transported solids to fall and to supply pit on surface with solids for permitting cleaning of pit - Google Patents

Solids i.e. sand, trapping device for degritting element to convey e.g. charged water pipe, has opening formed in bottom of trough to permit transported solids to fall and to supply pit on surface with solids for permitting cleaning of pit Download PDF

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Publication number
FR2940987A1
FR2940987A1 FR0900074A FR0900074A FR2940987A1 FR 2940987 A1 FR2940987 A1 FR 2940987A1 FR 0900074 A FR0900074 A FR 0900074A FR 0900074 A FR0900074 A FR 0900074A FR 2940987 A1 FR2940987 A1 FR 2940987A1
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solids
pit
trough
transported
opening
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FR2940987B1 (en
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Bernard Sikora
Dominique Laplace
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    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/14Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D21/00Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02Settling tanks with single outlets for the separated liquid

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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)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sewage (AREA)

Abstract

The device has an opening (g) formed in bottom of a trough (f) to permit the transported solids i.e. sand (h), to fall and to supply pit having direct access on a surface with the solids, for permitting cleaning of the pit without passing through the opening. The opening is arranged in the trough to trap the haulage, and is closed to insulate the pit of main flow by a trap system (i) to allow cleaning of water by maintaining the normal flow conditions. The opening of the trough is dimensioned according to the flow characteristics and characteristics of the solids and transported products.

Description

-1- Optimisation du fonctionnement et de l'exploitation des ouvrages de dessablement La présente invention est destinée aux ouvrages de dessablement. Elle a pour objet (a) de ne piéger que les granulométries supérieures ou égales aux sables, (b) de rendre plus opérationnels l'isolation et le curage des fosses et (c) de supprimer les phénomènes de revidage survenant sous des régimes d'écoulement élevés. Le dispositif proposé donne à l'objet de l'invention un maximum d'effets utiles qui n'avaient pas été obtenus à ce jour par des dispositifs similaires. The present invention is intended for desalinization works. Its purpose is (a) to trap only the granulometries greater than or equal to the sands, (b) to make the isolation and cleaning of the pits more operational and (c) to suppress the phenomena of re-occurrence occurring under high flow. The proposed device gives the object of the invention a maximum of useful effects that had not been obtained to date by similar devices.

Etat de l'art actuel : Les ouvrages de dessablement classiques sont implantés sur des cours d'eau, des réseaux d'évacuation d'eaux pluviales et/ou d'eaux usées, ainsi que sur des conduites d'eaux plus ou moins chargées. Les chambres et couloirs de dessablement sont dimensionnés sur des principes de décantation, et, de leur fonction première qui est de piéger uniquement des sables, ces ouvrages se transforment en fosses nauséabondes avec un surplus de matières organiques, de graisses et d'objets flottants. Lors de régime de crue, l'augmentation des vitesses provoque la remise en circulation des produits piégés, ce qui contribue à polluer le milieu naturel. Le piège à charriage est dimensionné sur un principe de transport solide. C'est un système sélectif conçu pour que seuls les solides transportés par charriage au fond soient retenus, et qu'ils ne soient pas érodés en cas d'augmentation des vitesses de l'écoulement. La technique du piège à charriage est décrite dans le certificat d'utilité n°2 751 679. Elle repose sur le principe d'une fosse recouverte par deux plaques laissant entre elles une ouverture transversale à l'écoulement permettant aux solides charriés par l'écoulement de tomber dans la fosse. Pour curer la fosse, les plaques sont relevées, grâce à un système mécanique approprié, en pivotant chacune autour d'un axe horizontal situé à leurs extrémités respectivement amont et aval et l'écoulement est ainsi dévié par un by-pass latéral. A l'usage, il s'avère qu'il n'existe pas de dispositif relevage des plaques qui soit simple et fiable et étanche, ce qui a conduit à abandonner le principe. 2940987 -3- Current state of the art: Conventional desalinisation works are located on watercourses, rainwater drainage networks and / or wastewater networks, as well as on more or less loaded water pipes. . The chambers and corridors of desilination are sized on principles of decantation, and their primary function is to trap only sands, these works are transformed into nauseating pits with a surplus of organic matter, grease and floating objects. During a flood regime, the increase in speeds causes the re-circulation of the trapped products, which contributes to polluting the natural environment. The thrust trap is sized on a solid transport principle. It is a selective system designed to ensure that only solids transported by bottom thrust are retained, and that they are not eroded in the event of increased flow velocities. The technique of the thrusting trap is described in the utility certificate No. 2 751 679. It is based on the principle of a pit covered by two plates leaving between them an opening transverse to the flow allowing the solids carried by the flow of falling into the pit. To clean the pit, the plates are raised, thanks to an appropriate mechanical system, each pivoting about a horizontal axis located at their ends respectively upstream and downstream and the flow is thus deflected by a side bypass. In use, it turns out that there is no lifting device plates that is simple and reliable and waterproof, which led to abandon the principle. 2940987 -3-

Cette installation comprend : 5 Une chambre (a), la représentation de la surface (b), un regard d'accès principal (c), l'arrivée de la canalisation amont (d), le départ de la canalisation (e), la goulotte (f), l'ouverture en fond de goulotte (g), les sables (h), la trappe de fermeture (i), le séparateur (j), les regards destinés au curage (k), les angles coupés (1). This installation comprises: A chamber (a), the representation of the surface (b), a main access point (c), the arrival of the upstream line (d), the departure of the line (e), chute (f), chute opening (g), sands (h), closing hatch (i), separator (j), manholes (k), cut corners ( 1).

10 15 20 25 30 -1- Optimisation du fonctionnement et de l'exploitation des ouvrages de dessablement La présente invention est destinée aux ouvrages de dessablement. Elle a pour objet (a) de ne piéger que les granulométries supérieures ou égales aux sables, (b) de rendre plus opérationnels l'isolation et le curage des fosses et (c) de supprimer les phénomènes de revidage survenant sous des régimes d'écoulement élevés. Le dispositif proposé donne à l'objet de l'invention un maximum d'effets utiles qui n'avaient pas été obtenus à ce jour par des dispositifs similaires. The present invention is intended for desalinization works. Its purpose is (a) to trap only the granulometries greater than or equal to the sands, (b) to make the isolation and cleaning of the pits more operational and (c) to suppress the phenomena of re-occurrence occurring under high flow. The proposed device gives the object of the invention a maximum of useful effects that had not been obtained to date by similar devices.

Etat de l'art actuel : Les ouvrages de dessablement classiques sont implantés sur des cours d'eau, des réseaux d'évacuation d'eaux pluviales et/ou d'eaux usées, ainsi que sur des conduites d'eaux plus ou moins chargées. Les chambres et couloirs de dessablement sont dimensionnés sur des principes de décantation, et, de leur fonction première qui est de piéger uniquement des sables, ces ouvrages se transforment en fosses nauséabondes avec un surplus de matières organiques, de graisses et d'objets flottants. Lors de régime de crue, l'augmentation des vitesses provoque la remise en circulation des produits piégés, ce qui contribue à polluer le milieu naturel. Le piège à charriage est dimensionné sur un principe de transport solide. C'est un système sélectif conçu pour que seuls les solides transportés par charriage au fond soient retenus, et qu'ils ne soient pas érodés en cas d'augmentation des vitesses de l'écoulement. La technique du piège à charriage est décrite dans le certificat d'utilité n°2 751 679. Elle repose sur le principe d'une fosse recouverte par deux plaques laissant entre elles une ouverture transversale à l'écoulement permettant aux solides charriés par l'écoulement de tomber dans la fosse. Pour curer la fosse, les plaques sont relevées, grâce à un système mécanique approprié, en pivotant chacune autour d'un axe horizontal situé à leurs extrémités respectivement amont et aval et l'écoulement est ainsi dévié par un by-pass latéral. A l'usage, il s'avère qu'il n'existe pas de dispositif relevage des plaques qui soit simple et fiable et étanche, ce qui a conduit à abandonner le principe. -2- Innovation proposée : La présente invention vise à remédier aux inconvénients liés aux ouvrages de dessablement. Elle sert à ne piéger que les sables tout en permettant le curage de la fosse par accès latéral et en empêchant l'érosion des solides piégés en cas d'augmentation des débits. Si le curage nécessite d'être réalisé hors d'eau, une simple trappe peut être actionnée pour obturer momentanément l'ouverture en radier sans modifier l'écoulement. L'équipement proposé comporte un ensemble appelé goulotte à ouverture traversant la totalité de la fosse de piégeage. Cette goulotte est reliée à l'entrée et la sortie de l'ouvrage de sorte que les eaux de temps sec puissent totalement y transiter. Elle comporte une ouverture dimensionnée en fonction des caractéristiques de l'écoulement et des solides transportés, pour permettre la chute des solides charriés, pour limiter la sédimentation des matières en suspension ainsi que l'accumulation des graisses, et empêcher l'érosion des solides piégés, même en cas d'augmentation du débit de l'écoulement dans l'ouvrage. Cette configuration permet de libérer de l'espace latéralement de chaque coté du caniveau à ouverture, afin de procéder aux phases de curage de la fosse tout en maintenant l'écoulement. Des regards d'accès peuvent être disposés latéralement au- dessus des zones de piégeage pour faciliter le curage. Un déflecteur peut être placé sur le radier de la fosse pour soutenir la goulotte et favoriser le piégeage sur les cotés de la fosse. La forme du fond peut être adaptée pour que les solides se déposent au droit du ou des accès latéraux. Dans le dispositif proposé, l'ouverture en radier de la goulotte peut être fixe ou déplaçable le long de la goulotte, la portion de goulotte située au droit de l'ouverture, de même que l'ouverture, peuvent posséder une largeur supérieure au reste de la goulotte, et l'ouverture peut intéresser tout ou partie de la goulotte. Les dessins schématiques annexés, sont donnés à titre d'exemple non limitatif de formes de réalisation du dispositif objet de l'invention : La figure 1 représente la chambre en coupe vu face La figure 2 représente la chambre en coupe vue de gauche La figure 3 représente la chambre vu de dessus La figure 4 représente la chambre vue de face avec le plan d'eau 2940987 -3- Current state of the art: Conventional desalinisation works are located on watercourses, rainwater drainage networks and / or wastewater networks, as well as on more or less loaded water pipes. . The chambers and corridors of desilination are sized on principles of decantation, and their primary function is to trap only sands, these works are transformed into nauseating pits with a surplus of organic matter, grease and floating objects. During a flood regime, the increase in speeds causes the re-circulation of the trapped products, which contributes to polluting the natural environment. The thrust trap is sized on a solid transport principle. It is a selective system designed to ensure that only solids transported by bottom thrust are retained, and that they are not eroded in the event of increased flow velocities. The technique of the thrusting trap is described in the utility certificate No. 2 751 679. It is based on the principle of a pit covered by two plates leaving between them an opening transverse to the flow allowing the solids carried by the flow of falling into the pit. To clean the pit, the plates are raised, thanks to an appropriate mechanical system, each pivoting about a horizontal axis located at their ends respectively upstream and downstream and the flow is thus deflected by a side bypass. In use, it turns out that there is no lifting device plates that is simple and reliable and waterproof, which led to abandon the principle. -2- Proposed Innovation: The present invention aims to overcome the disadvantages associated with desilination works. It serves to trap only the sands while allowing the cleaning of the pit by lateral access and preventing the erosion of trapped solids in case of increased flows. If the cleaning requires to be performed out of water, a simple hatch can be actuated to momentarily close the opening in raft without changing the flow. The proposed equipment includes a set called chute opening through the entire trapping pit. This chute is connected to the entrance and the exit of the structure so that the dry weather water can totally pass through it. It has an opening dimensioned according to the characteristics of the flow and the transported solids, to allow the fall of the loaded solids, to limit the sedimentation of the suspended matter as well as the accumulation of the greases, and to prevent the erosion of the trapped solids. , even in case of increase of the flow of the flow in the work. This configuration frees space laterally on each side of the opening channel, to proceed with the cleaning phases of the pit while maintaining the flow. Access eyes can be arranged laterally above the trapping areas to facilitate cleaning. A deflector can be placed on the floor of the pit to support the chute and encourage trapping on the sides of the pit. The shape of the bottom can be adapted so that the solids are deposited at the right side or side access. In the proposed device, the opening in the chute of the chute can be fixed or movable along the chute, the chute portion located at the opening, and the opening, may have a width greater than the rest chute, and the opening may interest all or part of the chute. The accompanying diagrammatic drawings are given by way of non-limiting example of embodiments of the device which is the subject of the invention: FIG. 1 shows the sectional chamber seen in front FIG. 2 represents the sectional chamber seen from the left FIG. represents the chamber seen from above Figure 4 represents the chamber seen from the front with the water body 2940987 -3-

Cette installation comprend : 5 Une chambre (a), la représentation de la surface (b), un regard d'accès principal (c), l'arrivée de la canalisation amont (d), le départ de la canalisation (e), la goulotte (f), l'ouverture en fond de goulotte (g), les sables (h), la trappe de fermeture (i), le séparateur (j), les regards destinés au curage (k), les angles coupés (1). This installation comprises: A chamber (a), the representation of the surface (b), a main access point (c), the arrival of the upstream line (d), the departure of the line (e), chute (f), chute opening (g), sands (h), closing hatch (i), separator (j), manholes (k), cut corners ( 1).

10 15 20 25 30 10 15 20 25 30

FR0900074A 2009-01-09 2009-01-09 OPTIMIZATION OF THE OPERATION AND OPERATION OF DESANDING WORKS Expired - Fee Related FR2940987B1 (en)

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FR0900074A FR2940987B1 (en) 2009-01-09 2009-01-09 OPTIMIZATION OF THE OPERATION AND OPERATION OF DESANDING WORKS

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2532276C1 (en) * 2013-07-09 2014-11-10 Михаил Иванович Голубенко Sand and grit catcher
CN114197409A (en) * 2022-01-08 2022-03-18 杜明正 Water conservancy hydropower station water retaining dam with silt separation function
FR3119850A1 (en) 2021-02-14 2022-08-19 Biesse Philippe Compact bedload trap.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760409A1 (en) * 1995-09-04 1997-03-05 Baramy Engineering Pty Ltd. Filtering apparatus
DE19635176A1 (en) * 1995-10-19 1997-04-24 Nill Werner Device for continuously removing sand
WO1999054564A1 (en) * 1998-04-20 1999-10-28 Ecosol Pty. Ltd. Rapid storm water filtration
WO2002004754A1 (en) * 2000-07-10 2002-01-17 Central Moreton Industries Pty Ltd A filter assembly
US20050167344A1 (en) * 2000-05-12 2005-08-04 Joseph Rodriguez Solids/liquids separator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0760409A1 (en) * 1995-09-04 1997-03-05 Baramy Engineering Pty Ltd. Filtering apparatus
DE19635176A1 (en) * 1995-10-19 1997-04-24 Nill Werner Device for continuously removing sand
WO1999054564A1 (en) * 1998-04-20 1999-10-28 Ecosol Pty. Ltd. Rapid storm water filtration
US20050167344A1 (en) * 2000-05-12 2005-08-04 Joseph Rodriguez Solids/liquids separator
WO2002004754A1 (en) * 2000-07-10 2002-01-17 Central Moreton Industries Pty Ltd A filter assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2532276C1 (en) * 2013-07-09 2014-11-10 Михаил Иванович Голубенко Sand and grit catcher
FR3119850A1 (en) 2021-02-14 2022-08-19 Biesse Philippe Compact bedload trap.
CN114197409A (en) * 2022-01-08 2022-03-18 杜明正 Water conservancy hydropower station water retaining dam with silt separation function
CN114197409B (en) * 2022-01-08 2023-08-08 江西七叶花装备智能科技股份有限公司 Water conservancy hydropower station water blocking dam with sediment separation function

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