FR3085345A1 - Device for collecting floating algae before stranding on the coast - Google Patents

Device for collecting floating algae before stranding on the coast Download PDF

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Publication number
FR3085345A1
FR3085345A1 FR1903966A FR1903966A FR3085345A1 FR 3085345 A1 FR3085345 A1 FR 3085345A1 FR 1903966 A FR1903966 A FR 1903966A FR 1903966 A FR1903966 A FR 1903966A FR 3085345 A1 FR3085345 A1 FR 3085345A1
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Prior art keywords
coast
bag
algae
collecting floating
floating algae
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Pending
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FR1903966A
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French (fr)
Inventor
Jérôme FILLEAU
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Filleau Jerome
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Filleau Jerome
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Priority to FR1903966A priority Critical patent/FR3085345A1/en
Publication of FR3085345A1 publication Critical patent/FR3085345A1/en
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Classifications

    • 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
    • B63B35/32—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for for collecting pollution from open water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • B63B1/121—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly comprising two hulls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/165—Use of propulsion power plant or units on vessels the vessels being motor-driven by hydraulic fluid motor, i.e. wherein a liquid under pressure is utilised to rotate the propelling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/02—Arrangements on vessels of propulsion elements directly acting on water of paddle wheels, e.g. of stern wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • B63H2021/171—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor making use of photovoltaic energy conversion, e.g. using solar panels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
    • Y02T70/5218—Less carbon-intensive fuels, e.g. natural gas, biofuels
    • Y02T70/5236—Renewable or hybrid-electric solutions

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Public Health (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Catching Or Destruction (AREA)

Abstract

Dispositif pour ramasser les algues flottantes type sargasses ou équivalent avant leur échouage sur le littoral. Il est constitué d’un sac en filet tracté entre les deux coques d’un catamaran mu par des roues à aubes.Device for collecting floating sargassum-like algae or equivalent before being stranded on the coast. It consists of a mesh bag towed between the two hulls of a catamaran driven by paddle wheels.

Description

DescriptionDescription

Titre de l'invention : Dispositif de ramassage des algues flottantes avant leur échouage sur le littoral.Title of the invention: Device for collecting floating algae before stranding on the coast.

[0001] Depuis 2011, les échouages massifs d’algues sargasses sur les côtes des îles de la Caraïbe se sont succédés avec une ampleur et une durée toujours croissantes, entraînant une catastrophe économique, écologique et humaine.Since 2011, massive strandings of Sargassum algae on the coasts of the Caribbean islands have succeeded each other with ever increasing magnitude and duration, causing economic, ecological and human catastrophe.

[0002] Le ramassage des sargasses échouées sur les plages qui se pratique actuellement ne constitue pas la meilleure réponse. Ce ramassage ne pouvant se faire efficacement à la main, il nécessite le recours à des engins de chantier qui ramassent également du sable, détruisant ainsi tous les écosystèmes de ces plages. De plus, s’il n’est pas réalisé en moins de 48 heures, les sargasses ont commencé leur décomposition avec production de gaz toxiques H2S et NH3.The collection of sargassum stranded on the beaches that is currently practiced is not the best answer. This collection can not be done effectively by hand, it requires the use of construction equipment which also collect sand, destroying all the ecosystems of these beaches. In addition, if it is not carried out in less than 48 hours, the sargasses have started their decomposition with the production of toxic gases H 2 S and NH 3 .

[0003] Par ailleurs, ce ramassage ne se fait que sur une très faible part du littoral. Les côtes de ces îles sont constituées de 25% de plages dont certaines sont inaccessibles aux engins. Les autres côtes sont rocheuses. C’est donc au moins 80 % du littoral qui n’est jamais débarrassé de ses algues ce qui entraîne une catastrophe écologique non encore mesurée.Furthermore, this pickup is done only on a very small part of the coast. The coasts of these islands are made up of 25% of beaches, some of which are inaccessible to gear. The other coasts are rocky. It is therefore at least 80% of the coastline which is never rid of its algae which leads to an ecological disaster not yet measured.

[0004] Le mal doit être combattu en amont par un ramassage avant échouage ou avant envahissement des plages, ports, baies et mangroves.Evil must be combated upstream by picking up before stranding or before invasion of beaches, ports, bays and mangroves.

[0005] Il existe actuellement quelques procédés de ramassage avant échouage avec notamment des tapis roulants mais ils se heurtent au problème de l’évacuation des algues car le navire de ramassage se trouve rapidement encombré et le transbordement de ces algues sur une barge de servitude immobilise le navire de ramassage. Ensuite, lorsque la barge est revenue à quai, une nouvelle manutention est nécessaire pour la vider.There are currently some methods of picking up before beaching, in particular with conveyor belts, but they run up against the problem of evacuating algae because the collecting vessel is quickly congested and the transhipment of these algae onto a service barge immobilizes the pickup ship. Then, when the barge has returned to the quay, further handling is necessary to empty it.

[0006] Nous proposons de ramasser les sargasses dans des sacs en filet tractés entre les deux coques d’un catamaran. Lorsque le sac est plein, on le ferme, et on en met tout de suite un autre en place pour reprendre le ramassage.We suggest collecting the sargassum in mesh bags towed between the two hulls of a catamaran. When the bag is full, we close it, and immediately put another in place to resume pickup.

[0007] Le sac abandonné flotte. Il est pris en remorque par un petit navire de servitude qui peut en tracter plusieurs simultanément, et les ramener au bord (quai, plage, rampe etc.). Ces sacs sont ensuite très faciles à charger sur une remorque adaptée [0008] Ou bien vidés directement en quelques secondes dans un camion benne qui emportera les algues à leur destination finale. Une fois vidé, le sac est réintroduit dans le circuit.The abandoned bag floats. It is taken in tow by a small service vessel which can tow several simultaneously, and bring them back to the edge (quay, beach, ramp etc.). These bags are then very easy to load on a suitable trailer. Or else emptied directly in a few seconds into a dump truck which will take the algae to their final destination. Once emptied, the bag is reintroduced into the circuit.

[0009] Le navire de ramassage travaille ainsi quasiment, voire totalement, en continu. Son rendement est donc optimisé. De plus, la manutention des algues conditionnées en sacs est largement facilitée.The pickup vessel works almost, if not completely, continuously. Its performance is therefore optimized. In addition, handling of algae packed in bags is greatly facilitated.

[0010] Le remorquage immédiat du sac plein d’algues n’est pas obligatoire : ces deux opérations peuvent être dissociées. Il suffit, avant largage du sac, de l’équiper d’une petite ancre et d’un flotteur muni d’un drapeau. Le sac est ainsi immobilisé, facilement repérable et peut faire l’objet d’un remorquage ou d’un ramassage différé.The immediate towing of the bag full of algae is not compulsory: these two operations can be separated. Before dropping the bag, it is enough to equip it with a small anchor and a float fitted with a flag. The bag is thus immobilized, easily located and can be towed or delayed.

[0011] Ces sacs peuvent être également vidés dans un navire de plus grande capacité qui conduira les algues au dessus de fonds de plusieurs centaines de mètres où elles pourront être coulées. Cela peut notamment se faire par écrasement des aérocytes qui leur permettent de flotter ou par pompage à plus de 50 mètres, profondeur à partir de laquelle l’écrasement des aérocytes par la pression est suffisant pour que les algues ne remontent pas.These bags can also be emptied into a larger capacity vessel which will carry the algae above the bottom of several hundred meters where they can be poured. This can be done in particular by crushing the aerocytes which allow them to float or by pumping over 50 meters, depth from which the crushing of the aerocytes by pressure is sufficient for the algae not to rise.

[0012] Les dessins annexés illustrent l’invention :The accompanying drawings illustrate the invention:

[0013] [fig.l] représente le navire vu du dessus et en coupe verticale AA.[Fig.l] shows the ship seen from above and in vertical section AA.

[0014] [fig-2] représente le cadre mobile : en position changement de sac et en position collecte des sargasses.[Fig-2] shows the movable frame: in bag change position and sargassum collection position.

[0015] DESCRIPTION DU SAC EN FILET : Un prototype a été testé. Il était constitué d’un filet à mailles nouées de 25 mm réalisé avec un fil de 2 mm. Le filet de départ mesure 5 m x 5 m. Il est refermé sur deux bords opposés et cousu pour former un cylindre de 5 m de long et 1,59 m de diamètre. Pour le ramassage, une des extrémités du cylindre est fermée par un cordage passant dans les mailles comme un chalut de pêche. L’autre extrémité est tendue sur un cadre métallique dont le développé est égal à 5 m. Ce cadre est installé entre les deux coques d’un navire catamaran et tracté dans une nappe de sargasses. Lorsque le sac est plein, on le ferme et on le remplace par un sac vide.DESCRIPTION OF THE NET BAG: A prototype has been tested. It consisted of a 25 mm knotted mesh net made with a 2 mm wire. The starting net measures 5 m x 5 m. It is closed on two opposite edges and sewn to form a cylinder 5 m long and 1.59 m in diameter. For collection, one end of the cylinder is closed by a rope passing through the mesh like a fishing trawl. The other end is stretched over a metal frame whose span is equal to 5 m. This frame is installed between the two hulls of a catamaran ship and towed in a layer of sargassum. When the bag is full, close it and replace it with an empty bag.

[0016] DESCRIPTION DU NAVIRE : Le navire de ramassage [fig.l] est un catamaran qui traîne, entre ses deux coques, le sac en filet ouvert, fixé sur le cadre susmentionné. Sa taille est fonction de la taille du sac. Pour le prototype de sac testé, le navire mesure 3 mètres de large et 5 mètres de long. Il est équipé d’un toit couvert de 15 m2 de capteurs solaires photo voltaïques, de batteries pour stocker l’énergie électrique ainsi récupérée et de moteurs électriques actionnant deux roues à aubes situées à l’arrière des coques. Le choix des roues à aubes comme mode de propulsion est dicté par le fait que les algues rendent les hélices inopérantes.DESCRIPTION OF THE VESSEL: The pickup vessel [fig.l] is a catamaran which tows, between its two hulls, the open mesh bag, fixed to the above-mentioned frame. Its size depends on the size of the bag. For the prototype bag tested, the ship is 3 meters wide and 5 meters long. It is equipped with a covered roof of 15 m 2 of photovoltaic solar collectors, batteries to store the electric energy thus recovered and electric motors operating two paddle wheels located at the rear of the hulls. The choice of impellers as the propulsion mode is dictated by the fact that the algae render the propellers inoperative.

[0017] La vitesse et le sens de rotation de ces roues à aubes peuvent être modulés indépendamment l’une de l’autre ce qui permet de diriger le navire sans avoir besoin d’un gouvernail lequel serait très peu efficace voire inopérant à faible vitesse d’autant plus qu’il serait encombré par les algues.The speed and the direction of rotation of these impellers can be modulated independently of each other which allows to steer the ship without the need for a rudder which would be very ineffective or even inoperative at low speed especially since it would be crowded with algae.

[0018] CADRE PORTE FILET : Le cadre sur lequel est fixé le sac en filet peut être basculé avec des leviers afin de pouvoir le relever pour fermer le sac plein et le remplacer par un sac vide [fig.2].FRAME NET HOLDER: The frame on which is fixed the mesh bag can be tilted with levers in order to be able to raise it to close the full bag and replace it with an empty bag [fig.2].

[0019] VARIANTES PROPULSION : En dehors des moteurs électriques, une variante pour la propulsion est proposée. Elle est constituée d’un moteur principal entraînant une pompe hydraulique laquelle alimente deux moteurs hydrauliques à la place des deux moteurs électriques. Ce moteur principal peut être soit électrique, alimenté par les batteries solaires, soit thermique (diesel). Cette dernière solution est moins chère mais moins «écologique».PROPULSION VARIANTS: Apart from electric motors, a variant for propulsion is proposed. It consists of a main motor driving a hydraulic pump which supplies two hydraulic motors instead of the two electric motors. This main engine can be either electric, powered by solar batteries, or thermal (diesel). The latter solution is cheaper but less "ecological".

Claims (1)

Revendications Claims [Revendication 1] [Claim 1] Dispositif pour ramasser les algues flottantes type sargasses ou équivalent avant leur échouage sur le littoral grâce à des sacs en filet. Device to collect floating sargassum-type algae or equivalent before being stranded on the coast using mesh bags. [Revendication 2] [Claim 2] Navire type catamaran comportant un dispositif selon revendication 1 à savoir un sac en filet tracté entre ses coques. Catamaran type ship comprising a device according to claim 1, namely a mesh bag towed between its hulls. [Revendication 3] [Revendication 4] [Claim 3] [Claim 4] Navire selon revendication 2, mu par des roues à aubes. Navire selon revendication 3 caractérisé en ce que les roues à aubes sont actionnées par des moteurs électriques ou hydrauliques. Ship according to claim 2, driven by impellers. Ship according to claim 3 characterized in that the impellers are actuated by electric or hydraulic motors.
1/11/1
FR1903966A 2019-04-12 2019-04-12 Device for collecting floating algae before stranding on the coast Pending FR3085345A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1903966A FR3085345A1 (en) 2019-04-12 2019-04-12 Device for collecting floating algae before stranding on the coast

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FR1903966 2019-04-12
FR1903966A FR3085345A1 (en) 2019-04-12 2019-04-12 Device for collecting floating algae before stranding on the coast

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041025A1 (en) * 1996-04-30 1997-11-06 Enrique Garriga Cusell Boat for cleaning aquatic surfaces
FR2791947A3 (en) * 1999-04-12 2000-10-13 Damien Servant Multi-function float has photovoltaic module drive by which float is automatically and randomly moved over water surface to clear it of debris
US20050020156A1 (en) * 2001-12-14 2005-01-27 Price Randy R Autonomous bird predation reduction device
US20060102532A1 (en) * 2004-11-16 2006-05-18 Cadotte Roland Jr Water surface cleaning machine
FR2881100A1 (en) * 2005-01-25 2006-07-28 Droff Yves Le Floating waste, e.g. hydrocarbon, collecting device for e.g. boat, has flexible reservoir mechanically connected to floating rigid structure and comprising rigid inlet with floater that maintains inlet above water

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997041025A1 (en) * 1996-04-30 1997-11-06 Enrique Garriga Cusell Boat for cleaning aquatic surfaces
FR2791947A3 (en) * 1999-04-12 2000-10-13 Damien Servant Multi-function float has photovoltaic module drive by which float is automatically and randomly moved over water surface to clear it of debris
US20050020156A1 (en) * 2001-12-14 2005-01-27 Price Randy R Autonomous bird predation reduction device
US20060102532A1 (en) * 2004-11-16 2006-05-18 Cadotte Roland Jr Water surface cleaning machine
FR2881100A1 (en) * 2005-01-25 2006-07-28 Droff Yves Le Floating waste, e.g. hydrocarbon, collecting device for e.g. boat, has flexible reservoir mechanically connected to floating rigid structure and comprising rigid inlet with floater that maintains inlet above water

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