EP2990355A1 - Dispositif flotteur stable pour réduire l'évaporation dans des lagunes ouvertes - Google Patents

Dispositif flotteur stable pour réduire l'évaporation dans des lagunes ouvertes Download PDF

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Publication number
EP2990355A1
EP2990355A1 EP14787559.5A EP14787559A EP2990355A1 EP 2990355 A1 EP2990355 A1 EP 2990355A1 EP 14787559 A EP14787559 A EP 14787559A EP 2990355 A1 EP2990355 A1 EP 2990355A1
Authority
EP
European Patent Office
Prior art keywords
approximately
cavities
cover
perimetral
cylindrical body
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Withdrawn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
EP14787559.5A
Other languages
German (de)
English (en)
Other versions
EP2990355A4 (fr
Inventor
Francisco CRUZ QUIROGA
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.)
Compagnon Bernabe SA
Original Assignee
Compagnon Bernabe SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=51790952&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2990355(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Compagnon Bernabe SA filed Critical Compagnon Bernabe SA
Publication of EP2990355A1 publication Critical patent/EP2990355A1/fr
Publication of EP2990355A4 publication Critical patent/EP2990355A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/06—Safety devices; Coverings for baths
    • E04H4/08—Coverings consisting of rigid elements, e.g. coverings composed of separate or connected elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B2201/00—Devices, constructional details or methods of hydraulic engineering not otherwise provided for

Definitions

  • the invention is intended to reduce the evaporation in open lagoons.
  • This invention relates to a device useful in reducing evaporation in open lagoons.
  • This invention comprises a floating device that meets the restrictions required by large-scale mining such that it diminishes evaporation in open lagoons and withstands climatic and atmospheric conditions in the large-scale mining zone.
  • Evaporation in this type of body of water is controlled, for example, by chemical canopies consisting of dumping a chemical into the stored water so that the chemical forms a liquid film above the water; floating covers made of floating synthetic film that cover the entire area of exposed water; superposed covers consisting of floating synthetic covers that are held up by structures; or floating objects consisting of multiple individual objects that are placed on the exposed area of the water and float beside each other.
  • Document US2008000903 describes a modular floating cover for a water storage consisting of a plurality of modules in which each module includes a chamber defined by an upper surface and a lower surface, there being openings in the upper surface to allow ingress of water into the chamber and openings in the upper surface to allow air to flow into and out of the chamber depending on the water level within that chamber so that each module floats independently.
  • the size of the module is selected to ensure that the module is stable in high wind conditions and that stacks of modules are not formed.
  • the modules may be hexagonal or octagonal.
  • Document WO2011035362 describes a module forming part of a floating modular cover, including an upper shell, a lower shell, a chamber defined by the upper and lower shells, a water ingress opening in the lower cover to allow ingress of water to the chamber for ballast and an opening in the upper shell to allow air to flow into and out of the chamber and a plurality of discrete flotation cells for ensuring flotation of the module, wherein the upper shell and lower shell, when the module is in an assembled state, act to house each flotation cell in a predetermined position within the chamber.
  • Document WO2010083560 describes a module forming part of a floating cover for water, including an upper shell, a lower shell and a chamber defined by the upper and lower shells; one or more water ingress openings in the lower shell to allow ingress of water into the chamber; one or more air openings in the upper shell to allow air to flow into and out of the chamber depending on the water level within the chamber; one or more first securing openings in the lower shell; one or more second securing openings in the upper shell; and a plurality of flotation cells for ensuring flotation of the module.
  • Each flotation cell is insertable through a pair of first and second securing openings and cooperating with the first shell wall portions surrounding each pair of first and second securing openings to retain the module in an assembled state.
  • Document US2007275616 describes a floating water surface cover module comprising a rim and a shallow dome-shaped cover extending from the top of the rim and formed with a vent, the rim and cover being formed with shaped air-filled cavities spaced around the rim to provide buoyancy, the rim and shallow cover being configured so that one module is nested within another to form a stable stack.
  • This invention consists of a floating device that is stable, low cost, dissuasive to migratory birds, made of resistant material, easily transportable, installable and removable (for example, to perform maintenance), and allows small boats to navigate freely on the surface of the lagoon.
  • One objective sought by implementing the device in this invention is for a set of devices in this invention to be capable of forming a physical barrier covering the surface of the lagoon in order to reduce evaporation.
  • the objective is to cover less than 100% of the lagoon surface but more than 90% of the lagoon surface.
  • Another objective of this invention is for each device to float at the same predetermined level so that each device remains stable under adverse weather conditions, for example wind pressure, and does not sink by the effect of adjacent devices.
  • Another objective of this invention is also for the device to adapt to the change in surface because of waves, keeping the waves from passing over the device or bursting over the device, thus diminishing evaporation.
  • each device to have a suction effect so as to create a resistance to any wind that attempts to lift it off the surface of the lagoon, for example by lifting it and blowing it far from the surface of the lagoon.
  • the suction effect keeps the device from turning over. If one of its edges leaves the water, the device is re-stabilized immediately by the suction effect.
  • This invention corresponds to a floating device, including a cylindrical body having perimetral flotation cavities; and a predetermined quantity of air deposited and enclosed in each of such cavities; and covers to cover such cavities.
  • This invention corresponds to a floating device formed by a cylindrical body (6) having at least eight perimetral cavities (7); at least 8 covers (8) to cover those cavities; and a predetermined quantity of air deposited and enclosed in each of such cavities in the cylindrical body.
  • the cylindrical body (6) is formed by a pyramidal cover (1) that has a rounded outside edge; at least eight perimetral cavities (7) that surround the entire rounded edge of the pyramidal cover (1), wherein the cavities are open toward the top of the cylindrical body and have a closed, flat bottom (2); a perpendicular sidewall (3) along the entire perimeter of the cylindrical body (6); a central opening (4); and at least six radial structural ribs, preferably at least eight radial structural ribs (5) located in the bottom of the pyramidal cover (1).
  • the pyramidal shape of the cover (1) allows that cover to be higher in the center.
  • Each of the eight structural ribs starts from the rim of the central opening and extends radially until butting up against the interior rim of the perimetral cavities.
  • Those structural ribs have a depth or height of approximately 3 cms and a length that ranges from approximately 39 cm to approximately 63 cm, the preferred value being approximately 49 cm. They are also located at the bottom of the pyramidal cover, are made of a solid material, preferably polyethylene.
  • the sidewall (PL) also has a height that ranges from approximately 10 cm to approximately 20 cm.
  • perimetral cavities there are at least 8 perimetral cavities, more preferably 16, and each has a depth or height that ranges from approximately 3 cm to approximately 5 cm, where the preferred value is approximately 4 cm; and a width radial to the cylindrical body that ranges from approximately 6 cm to approximately 12 cm, the preferred value being approximately 7 cm or even more preferably approximately 9 cm.
  • the volume of air within all the perimetral cavities ranges from approximately 10,500 cm 3 to approximately 13,500 cm 3 and preferably totals approximately 11,500 cm 3 , even more preferably approximately 12,000 cm 3 .
  • the covers over the cavities are flat and are welded to such perimetral cavities so that the air is trapped inside the cavities and there are no leaks, each cover preferably covering at least 2 perimetral cavities.
  • the covers are in the shape of a section of the perimetral rim of the cylindrical body where the width radial to the cylindrical body is from approximately 6 cm to approximately 12 cm, the preferred value being approximately 7 cm or even more preferably approximately 9 cm.
  • Each cover has a surface thickness of approximately 2 mm and has two lower ribs, one located along the width of each of the ends of the cover so that the thickness of the cover at the ends can be increased to approximately 2.5 mm.
  • the air in each of the cavities allows the device to stay afloat. It is important that the quantity of air in each of the cavities be the same so that the device remains stable on the lagoon surface.
  • Air volume cm 3 device weight kg * 3 , 000 cm 3 / kg where the weight of the device is approximately from 3.5 to 4.5 kilograms.
  • the pyramidal cover is defined by least 8 triangular sections that rise in the form of a pyramid from the interior rim of the perimetral cavities at an elevation of approximately 7 degrees from an imaginary horizontal plane as far as the rim of the central opening, each of said triangular sections having equal sides and each side having a length that varies from approximately 39 cm to approximately 63 cm, the preferable value being 53 cm, even more preferably approximately 49 cm.
  • the floating device must have an appropriate suction force for such device to remain afloat and in position wherefore the device suction force depends on the total diameter of the device (D) ( figure 4 ), on the height of the device sidewall (PL), on the diameter of the device central opening (d) and on the height of the device flotation level, defined as height F in figure 4 , which corresponds to the section that is not below water, meaning the section of the device that is floating. It has therefore been established that such variables must meet the following ratio for the device to have an appropriate suction force. ( D / 2 ⁇ 2 * ⁇ * PL - F ⁇ 120.000 * d where the units of measure of each of the variables are expressed in centimeters.
  • the diameter (D) of the floating device has a value that ranges from approximately 90 cm to approximately 150 cms, preferably approximately 130 cm and more preferably approximately 116 cm; and the height of the sidewall of the floating device (PL) varies from approximately 10 cm to approximately 20 cm, its preferred measurement being approximately 10 cm to 16 cm, even more preferably approximately 14 cm.
  • the diameter of the central opening of the floating device (d) also varies from approximately 0.47 cm to approximately 2.30 cm, most preferably from approximately 0.8 cm to 1.5 cm, and the diameter is preferably approximately 1 cm; while the height of the flotation level (F) of the floating device measures from approximately 1 cm to approximately 4 cm, the preferred value being approximately 3 cm, even more preferably approximately 2.6 cm.
  • the device is manufactured by plastic injection into a chemically inert material such as, for example, high-density polyethylene (HDPE).
  • a chemically inert material such as, for example, high-density polyethylene (HDPE).
  • HDPE high-density polyethylene
  • the lower edge of the sidewall of the device must be blunt (9) so that the device will pose no risk of cutting the different types of membranes covering the walls and the bottom of lagoons, such as the geotextile layer that protects the sidewalls and the bottom of lagoons. This is also so that there is less of an undermining effect against walls that are not lined with membranes.
  • Figure 1 shows a perspective view of the bottom of the floating device in which the bottom of the pyramidal cover (1), the structural ribs (5) that give the floating device firmness, the central opening (4), the smooth bottom of the perimetral cavities (2) and the sidewall (3) of the device can be seen.
  • Figure 2 shows a perspective view of the top of the floating device in which the top of the pyramidal cover (1), the central opening (4), the sidewall (3) of the device, the perimetral cavities (7) and the covers (8) of such cavities can be seen.
  • Figure 3 shows the plan view of the floating device in which the perimetral cavities (7) can be seen.
  • Figure 5 shows a cross-section of two stacked floating devices in this invention in which it can be seen that one device is supported on another when the bottom of the perimetral cavities of a device butt up against the top of the covers of the perimetral cavities of the other device.
  • Figure 6 shows a close-up of figure 5 in which the bluntness (9) of the lower edge of the sidewall can be seen, which keeps membranes, i.e., geotextiles, from being cut.
  • the floating devices are also designed to facilitate stacking one on top of the other when they are not being used.
  • the devices can also be used in acid ponds since the preferred material for their manufacture is high-density polyethylene.
  • the floating devices in this invention When they are in use, the floating devices in this invention will form a physical barrier covering the surface of the lagoon, which will reduce evaporation. If the floating devices are installed on the entire surface of the lagoon, the physical barrier is estimated to cover approximately 90% of the lagoon surface. Please note that it is not convenient for 100% of the lagoon surface to be covered in order to keep the liquid from stagnating and to keep microorganisms from proliferating.
  • the physical barrier must also allow small boats to circulate on the surface of the lagoon and for an easy removal of the devices to allow lagoon maintenance.
  • the floating devices in this invention have the advantage of being stable since the perimetral cavities in the devices contain a predetermined quantity of trapped, enclosed air, said air being completely enclosed since the perimetral cavities have welded covers to keep air from escaping.
  • the structural technical features of this device allow the device to return to its initial position and maintain its flotation level in the face of abrupt movements. Since it has several cavities, the air is distributed uniformly throughout the perimetral rim, keeping the air trapped and enclosed in the device from escaping if there is a potential structural failure in one of the cavities.
  • a flotation device made of high-density polyethylene for use in open lagoons, having a total diameter of 116 cm; 16 cavities; 8 structural ribs; a central opening 1 cm in diameter; a sidewall height of 14 cm; and a flotation height of 2.65 cm.
  • the flotation device weighs 4 kilograms, so the total volume to be put inside all the cavities is 12,000 cm 3 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Electrostatic Separation (AREA)
EP14787559.5A 2013-04-23 2014-04-22 Dispositif flotteur stable pour réduire l'évaporation dans des lagunes ouvertes Withdrawn EP2990355A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CL2013001112A CL2013001112A1 (es) 2013-04-23 2013-04-23 Dispositivo flotador para lagunas abiertas que comprende un cuerpo cilindrico que posee al menos ocho cavidades perimetrales, al menos ocho tapas para tapar dichas cavidades y una cantidad de aire predeterminada depositada y encerrada en cada una de las cavidades del cuerpo cilindrico.
PCT/CL2014/000019 WO2014172801A1 (fr) 2013-04-23 2014-04-22 Dispositif flotteur stable pour réduire l'évaporation dans des lagunes ouvertes

Publications (2)

Publication Number Publication Date
EP2990355A1 true EP2990355A1 (fr) 2016-03-02
EP2990355A4 EP2990355A4 (fr) 2016-12-07

Family

ID=51790952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14787559.5A Withdrawn EP2990355A4 (fr) 2013-04-23 2014-04-22 Dispositif flotteur stable pour réduire l'évaporation dans des lagunes ouvertes

Country Status (8)

Country Link
US (1) US20160200504A1 (fr)
EP (1) EP2990355A4 (fr)
AU (1) AU2014256813A1 (fr)
CA (1) CA2910326A1 (fr)
CL (1) CL2013001112A1 (fr)
PE (1) PE20151991A1 (fr)
WO (1) WO2014172801A1 (fr)
ZA (1) ZA201507634B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6352168B2 (ja) * 2014-12-08 2018-07-04 三菱重工機械システム株式会社 ガスホルダ及びガスホルダの改修方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4366806A (en) * 1980-08-18 1983-01-04 Engineering & Research Assocs., Inc. Solar pool heater
US4875466A (en) * 1987-09-16 1989-10-24 Stephen Slonneger Solar heating disc
NO963888L (no) * 1996-09-17 1998-03-18 Rothor As Innretning for å begrense fordamping av vann
US7534154B2 (en) 2004-03-18 2009-05-19 Technological Resources Pty. Limited Water evaporation minimization
WO2006010204A1 (fr) 2004-07-28 2006-02-02 Water Innovations Pty Ltd Contrôle de l'évaporation dans un stockage des eaux
US7491265B1 (en) * 2005-06-17 2009-02-17 Johnson Dennis J Cover for animal waste collection area
AU2008255171A1 (en) * 2007-12-10 2009-06-25 David William Wright Evaporation Reduction Module
US8029208B1 (en) * 2008-08-11 2011-10-04 Freeport-Mcmoran Copper & Gold Inc. Apparatus and method for covering a surface of a body of water to inhibit evaporation
WO2010083560A1 (fr) 2009-01-21 2010-07-29 Aqua Guardian Group Ltd Régulation de l'évaporation d'une réserve d'eau
US8683620B1 (en) * 2009-04-29 2014-04-01 John F. Krumme Pool covers
WO2011035362A1 (fr) 2009-06-23 2011-03-31 Aqua Guardian Group Ltd Module flottant pour commande de l'évaporation dans un stockage d'eau
DE102010006592A1 (de) * 2010-02-02 2011-08-04 Weener Plastik AG, 26826 Schwimmfähiger technischer Hohlkörper und Verfahren zu dessen Herstellung
USD733322S1 (en) * 2014-04-15 2015-06-30 Robert Walczak Hexagonally-shaped solar heating swimming pool cover

Also Published As

Publication number Publication date
WO2014172801A1 (fr) 2014-10-30
EP2990355A4 (fr) 2016-12-07
ZA201507634B (en) 2017-01-25
CA2910326A1 (fr) 2014-10-30
AU2014256813A1 (en) 2015-11-19
CL2013001112A1 (es) 2013-10-11
PE20151991A1 (es) 2016-01-31
US20160200504A1 (en) 2016-07-14

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