WO2005054672A1 - Procede et appareil pour le traitement d'une partie d'une eolienne - Google Patents

Procede et appareil pour le traitement d'une partie d'une eolienne Download PDF

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Publication number
WO2005054672A1
WO2005054672A1 PCT/DK2004/000845 DK2004000845W WO2005054672A1 WO 2005054672 A1 WO2005054672 A1 WO 2005054672A1 DK 2004000845 W DK2004000845 W DK 2004000845W WO 2005054672 A1 WO2005054672 A1 WO 2005054672A1
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WO
WIPO (PCT)
Prior art keywords
carbon dioxide
cleaning
application head
cleaning process
wind turbine
Prior art date
Application number
PCT/DK2004/000845
Other languages
English (en)
Inventor
Paul Teichert
Original Assignee
Pp Energy Aps
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 Pp Energy Aps filed Critical Pp Energy Aps
Publication of WO2005054672A1 publication Critical patent/WO2005054672A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/24—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0021—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by liquid gases or supercritical fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/24—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons
    • E04G3/243—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons following the outside contour of a building
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
    • E04G3/30—Mobile scaffolds; Scaffolds with mobile platforms suspended by flexible supporting elements, e.g. cables
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/50—Maintenance or repair
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/50—Maintenance or repair
    • F03D80/55—Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/30—Arrangements for collecting, re-using or eliminating excess spraying material comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the present invention relates to a method and an apparatus for treatment, e.g. cleaning of a part of a wind turbine such as e.g. rotor blade on a wind turbine.
  • the rotor blades of a wind turbine may be so dirty from dust, salt coatings, dead insects, bird droppings and other surface coatings, that the efficiency of a given wind turbine may be reduced by 10 to 15% or even more depending on the relevant wind speed.
  • a special work platform with a through-going slit at the bottom has been fixed to these suspension means so that the rotor blade pointing downwards could be inserted into this slit.
  • the work platform has subsequently been hoisted upwards in a stepwise manner, while the crew has rinsed the surface of the rotor blade manually, e.g. with one person located on each side of the rotor blade.
  • the invention relates to a method for treatment, in particular cleaning, of a surface of a part of a wind turbine such as a rotor blade or a tower whereby - an apparatus and/or a platform is being placed in such a manner that it may be moved in relation to said surface, - a cleaning process is being performed on at least a part of said surface by said apparatus and/or by a person located on said platform,
  • carbon dioxide which is an excellent cleaning solution
  • carbon dioxide has the advantage that it is non-toxic, non- hazardous, non-corrosive and non-flammable.
  • carbon dioxide is also an environmentally friendly substance since it is naturally occurring as a by-product of natural processes and since cleaning with carbon dioxide will not add to global warming.
  • carbon dioxide is cheap and readily available, also caused by the fact that carbon dioxide is available as a by-product of industrial processes.
  • use of carbon dioxide as a cleaning agent does not produce solvent waste and does not require wastewater treatment. It should be mentioned that other cleaning agents may be used in addition to the carbon dioxide according to the invention, and further, extraction of such agents and dissolved dirt like hydrocarbon based grease, insects and water based minerals and salts etc. from the used carbon dioxide is relatively straightforward.
  • said cleaning process may be performed by means of blasting of pellets or the like, e.g. by dry ice blasting, said pellets comprising carbon dioxide (CO 2 ).
  • the cleaning method is environmental-friendly since the dry ice is non-toxic and since no waste material, e.g. dirt-containing water, cleaning solutions, blasting material remains etc. is produced apart from the dislodged dirt.
  • the surface treatment is non-abrasive and gentle to the surface of the rotor blade.
  • the transporting of a considerable amount of water, e.g. to the wind turbine site and to work location, e.g. the work platform, located at the rotor blade is avoided.
  • water tanks etc. are not needed when using this method, and only the comparatively light and compact containers for pressurized carbon dioxide need to be transported to the site of the wind turbine .
  • said cleaning process may comprise the application of carbon dioxide (CO 2 ) in gaseous form.
  • said cleaning process may comprise the application of carbon dioxide (CO 2 ) in liquid form.
  • the carbon dioxide can be supplied at a relatively low temperature, e.g. as liquid carbon dioxide (LCO 2 ), which may be advantageous in view of the necessary equipment, while still providing cleaning effects at a relatively high level.
  • LCO 2 liquid carbon dioxide
  • said cleaning process may comprise the application of carbon dioxide (CO 2 ) in supercritical form, i.e. at a pressure above 73 bars and a temperature above 31°C.
  • CO 2 carbon dioxide
  • carbon dioxide in supercritical form e.g. as SCCO 2
  • SCCO 2 supercritical form
  • an improved solvating power is achieved, e.g. the ability to solvate dirt like hydrocarbon based grease, insects and water based minerals and salts etc. on the surface.
  • said carbon dioxide (CO 2 ) may be delivered from a container, wherein carbon dioxide (CO 2 ) is stored in liquid form.
  • the carbon dioxide may be readily delivered from the pressurized container, where preferably the carbon dioxide is in liquid form, e.g. at a pressure of for example 200 bar, and where the carbon dioxide may be supplied directly to nozzles etc. without any further operation, even though it will be understood that the carbon dioxide may be pressurized and/or heated on its way to the surface.
  • At least part of said carbon dioxide (CO 2 ) may be accumulated for further processing, in particular for reuse, after having been utilized in the cleaning process.
  • the carbon dioxide may be processed in order to accumulate the dissolved and /or dislodged dirt etc., and the carbon dioxide may be reused, e.g. after having performed a condensation in order to liquefy the carbon dioxide.
  • heat may be applied when said carbon dioxide (CO 2 ) is applied to said surface.
  • a mechanical cleaning process may be performed before or after carbon dioxide (CO 2 ) is applied to said part of said surface.
  • a visual monitoring and/or inspection may be performed, e.g. using vision equipment.
  • the condition of the surface may be inspected before the treatment takes place, e.g. from ground level, and the result of the cleaning may be monitored.
  • the operation of the cleaning means may be controlled, e.g. the progress of the cleaning may be inspected and if a specific surface part has not been cleaned to a satisfactory degree, the cleaning process may be prolonged at the specific spot. Further, the cleaning process is allowed to move on as soon as a satisfactory level has been achieved, thus improving the efficiency of the cleaning operation and facilitating a fast operation.
  • the invention also relates to an apparatus for treatment, in particular cleaning, of at least part of a surface of a part of a wind turbine such as a rotor blade or a tower, said apparatus comprising
  • an application head designed to be placed on or near said part of a surface during the cleaning process, said application head comprising shielding means,
  • the apparatus When using this apparatus, the need to transport large amounts of water is avoided, and the carbon dioxide can be supplied relatively easily, e.g. from a container containing pressurized carbon dioxide. Further, carbon dioxide has the advantage that it is non-toxic, non-hazardous, non- corrosive and non-flammable. Also, carbon dioxide is an environmentally friendly substance since it is naturally occurring as a by-product of natural processes and since cleaning with carbon dioxide will not add to global warming. Further, carbon dioxide is cheap and readily available, also caused by the fact that carbon dioxide is available as a by-product of industrial processes. Still further, use of carbon dioxide as a cleaning agent does not produce solvent waste and does not require wastewater treatment. Thus, the apparatus according to the invention will provide an environmentally friendly cleaning to be performed at the relatively highly placed surfaces that are concerned when wind turbines have to be cleaned.
  • said apparatus may be designed for being operated by a person located on a platform or in a work cabin that is placed in such a manner that it may be moved in relation to said surface.
  • said apparatus may be designed in such a manner that at least said application head may be moved in relation to said surface in an at least partly automated manner.
  • the apparatus may be used in a manner that allows a lower degree of manual handling and possibly allows the crew to be situated at ground level instead of being placed at e.g. a platform.
  • the apparatus may form part of an apparatus for treating wind turbines as described in WO 03/048569, e.g. a device that may move controlled and/or automatically in order to treat the surface of e.g. a rotor blade.
  • said apparatus may comprise container means designed for storing carbon dioxide (CO 2 ) in liquid form, said container means being located in the vicinity of said application head.
  • CO 2 carbon dioxide
  • the carbon dioxide may be readily delivered from the pressurized container, where preferably the carbon dioxide is in liquid form, e.g. at a pressure of for example 200 bar, and where the carbon dioxide may be supplied directly to the nozzle or nozzles etc. without any further operation, even though it will be understood that the carbon dioxide may be pressurized and/or heated on its way to the surface.
  • said apparatus may comprise container means designed for storing carbon dioxide (CO 2 ) in liquid form, said container means being located at a level below said application head, e.g. at ground or sea level.
  • the part of the apparatus that has to be operated at the high levels may be smaller and/or lighter, which may be advantageous in many situations.
  • said application head may comprise blasting means for blasting of pellets or the like, e.g. dry ice blasting pellets, said pellets comprising carbon dioxide (CO 2 ).
  • blasting means for blasting of pellets or the like e.g. dry ice blasting pellets, said pellets comprising carbon dioxide (CO 2 ).
  • a very efficient cleaning apparatus is provided, e.g. caused by a relatively high cleaning speed and the nature of the dry ice pellets.
  • the cleaning method used by the apparatus is environmental-friendly since the dry ice is non-toxic and since no waste material, e.g. dirt-containing water, cleaning solutions, blasting material remains etc. is produced apart from the dislodged dirt etc.
  • the surface treatment is non-abrasive and gentle to the surface of the rotor blade.
  • the transporting of a considerable amount of water, e.g. to the wind turbine site and to work location, e.g. the work platform, located at the rotor blade, is avoided.
  • water tanks etc. are not needed when using this apparatus, and only the comparatively light and compact containers for pressurized carbon dioxide need to be transported to the site of the wind turbine.
  • said apparatus may comprise pumping means for increasing the pressure of the carbon dioxide (CO 2 ) supplied to the at least one nozzle.
  • said apparatus may comprise heating means for increasing the temperature of the carbon dioxide (CO ) supplied to the at least one nozzle.
  • the efficiency of the apparatus may be enhanced and that the apparatus may apply the carbon dioxide in the form of e.g. gaseous, supercritical (SCCO 2 ) and/or near-supercritical form.
  • SCCO 2 supercritical
  • said apparatus may comprise heating means located in or on said application head for maintaining or increasing the temperature inside the application head.
  • the temperature of the carbon dioxide may be controlled to attain and/or remain above a desired value in order to achieve a satisfactory efficiency at the location where the carbon dioxide is applied to the surface, i.e. inside the application head.
  • said apparatus may comprise suction means for removing at least part of the applied carbon dioxide (CO 2 ) from the interior of the application head.
  • CO 2 applied carbon dioxide
  • the carbon dioxide may be accumulated for further processing.
  • said apparatus may comprise recirculation means for reusing at least part of the carbon dioxide (CO 2 ) that is being removed from the interior of the application head by said suction means.
  • CO 2 carbon dioxide
  • said apparatus may comprise filtering and/or separating means for separating particles, residues etc. from the carbon dioxide (CO 2 ) that is being removed from the interior of the application head by said suction means.
  • the dissolved and/or dislodged dirt etc. may be accumulated and taken care of in e.g. a prescribed manner, for example in consideration of environmental requirements.
  • said apparatus may comprise mechanical cleaning means located in or on said application head.
  • said mechanical cleaning means may comprise brushes, e.g. rotating brushes.
  • the mechanical cleaning may be performed efficiently when using for example rotating brushes of the same type as those often used in car wash systems.
  • such brushes may be positioned in such a manner that the brushes are applied to a surface before the carbon dioxide, or vice versa.
  • one single rotating brush with a length corresponding to the width of the application head may be provided, or a plurality of brushes may be applied.
  • said shielding means of said application head may comprise sealing means for sealing against said surface.
  • an enhanced efficiency of the apparatus may be achieved, since the temperature and/or the pressure inside the application head may be controlled efficiently and it will be possible to achieve a relatively high temperature and/or pressure inside the application head.
  • a desired cleaning setting e.g. using carbon dioxide in liquid (LCO 2 ), supercritical (SCCO 2 ) and/or near-supercritical form.
  • said apparatus may comprise equipment for performing a visual monitoring and/or inspection of said surface before, during and/or after the treatment.
  • the condition of the surface may be inspected before the treatment takes place, e.g. from ground level, and the result of the cleaning performed by the apparatus may be monitored.
  • the operation of the apparatus may be controlled, e.g. the progress of the cleaning may be inspected and if a specific surface part has not been cleaned to a satisfactory degree, the cleaning process may be prolonged at the specific spot.
  • the apparatus is allowed to move on as soon as a satisfactory level has been achieved, thus improving the efficiency of the cleaning operation and facilitating a fast operation when using the apparatus .
  • the invention offers the possibility of a high degree of automation of such treatment processes, just as the treatments may be carried out quicker and more efficiently.
  • dry ice blasting is used for cleaning the surface of e.g. a rotor blade or a tower of a wind turbine.
  • the cleaning is very effective, e.g. caused by the high cleaning speed and the nature of the dry ice pellets.
  • the cleaning method is environmental- friendly since the dry ice is non-toxic (CO 2 is a natural part of the atmosphere) and since no waste material, e.g. water, cleaning solutions, blasting material remains etc. is produced apart from the dislodged dirt.
  • the surface treatment is non-abrasive and gentle to the surface of the rotor blade. Further, the transporting of substantial considerable of water, e.g.
  • fig. 1 illustrates a prior art cleaning system in connection with a land-based wind mill
  • fig. 2 illustrates a first embodiment of the invention
  • fig. 3 is a sectional and schematic view of an application head for an apparatus according to a first embodiment of the invention
  • fig. 4 is a schematic overview of an apparatus according to further embodiments of the invention
  • fig. 5 show in a general view a further embodiment of an apparatus according to the invention during treatment of a rotor blade
  • fig. 6 is a view in a larger scale corresponding to that of fig. 5
  • fig. 7 shows a modified embodiment of the apparatus shown in fig. 6, and
  • fig. 8 shows a phase diagram for carbon dioxide.
  • Figure 1 illustrates a commonly known land-based wind turbine 1 seen from a position directly in front of the rotor blades.
  • a commonly known wind turbine 1 comprises a wind turbine tower 2 positioned on a foundation on the ground 3.
  • a nacelle 4 has been positioned at the top of the wind turbine tower 2, and comprises a generator, gear mechanisms, control equipment, bearings etc., which may be turned depending on the direction of the wind as already known.
  • the nacelle 4 also carries the rotor hub 7, upon which a number, in this case three - which is most often the case -rotor blades 5, have been placed.
  • rotor blades may have wing tips 6 as illustrated depending on their type and brand.
  • rotor blades without such special wing tips are also known.
  • FIG. 1 An example of a prior art apparatus for treatment, e.g. washing and sealing of the rotor blades 6, is shown in fig. 1 in a stylistic manner and is generally designated 10.
  • the apparatus 10 may be able to move in various ways in relation to the rotor blade 6 and it will also be possible to place it or guide it up to and along the rotor blade 6 in various ways, for example using wires (not shown) anchored at the top of the tower or on the rotor hub.
  • a vehicle 8 e.g. a truck, mobile crane or the like, with a mounted crane 9 or a similar hoist or lift arrangement as shown in the figure, is designed to lift the apparatus 10 up towards a rotor blade 6 to be cleaned.
  • this equipment may be designed to move the apparatus up and down along the rotor blade, which, although, will require a crane 9 that will be able to reach to a very considerable height.
  • the apparatus e.g. a washing robot
  • the apparatus may be guided to the tip of the rotor blade 5, which is placed in a position pointing vertically downwards.
  • the washing robot 10 may then move on its own in an automated manner in relation to the rotor blade, as explained in WO 03/048569.
  • the apparatus may as mentioned be guided up and/or pulled up by means of lines, wires or the like.
  • the washing robot or apparatus 10 is connected to wires and/or hoses 11, which lead down to a unit generally marked 12 via the hoist arrangement 9, and which may e.g. comprise a water tank, tank(s) with cleaning agents, surface treatment means, sealing agents etc., an air compressor etc. as explained in WO 03/048569.
  • FIG. 2 illustrates a work platform 20 that is suspended by means of lines, wires etc. 21 alongside a rotor blade 5 of a wind turbine.
  • the wires 21 may extend down to ground level, or they may reach down only to the platform 20, depending on the type of hoisting arrangement.
  • This embodiment of the cleaning apparatus is illustrated for manual operation as indicated by the worker 24 situated on the platform 20, but as it will be explained later, the invention may also be utilized in a more or less automated manner.
  • the apparatus comprises an application head 30 that comprises handling means 31, e.g. a handle, by means of which the worker can move the application head along the surface of the rotor blade 5 while the cleaning is performed.
  • handling means 31 e.g. a handle
  • a carbon dioxide (CO 2 ) container 36 is connected by means of tubes 38 either directly to the application head 30, for example through the bottom 22 of the platform 20, or indirectly to the application head 30 via auxiliary equipment 40.
  • the auxiliary equipment 40 may comprise such means as a pressure regulator, heating equipment, possible pumping means, electric equipment, control equipment etc., which will explained in further detail later on.
  • the auxiliary equipment 40 is connected to the application head by means of supply lines 42 and further supply lines 44, e.g. comprising electric power cables, to ground level may be provided.
  • carbon dioxide can be applied to the surface of the rotor blade as a cleaning agent in different manners in dependence on the design of the apparatus, e.g. as a gas spray, a liquid spray, as a carbon dioxide snow spray, as a carbon dioxide pellet spray, e.g. similar to a bead blasting cleaning operation, in which case a supply of compressed air may be preferable as well, and/or as a supply of carbon dioxide in supercritical form (SCCO ) or near super critical form.
  • SCCO supercritical form
  • the cleaning is performed using e.g. the solvating power of the carbon dioxide in various forms.
  • an application head 30 is shown in a sectional view and in a larger scale than in fig. 2.
  • the application head comprises an encapsulation or shielding means 46, e.g. a box-shaped construction, that is open towards the surface to be cleaned, whereby a cleaning or reaction chamber 48 is produced.
  • the application head 30 may comprise special sealing means 47 in order to create a cleaning chamber that is insensitive not only to wind and temperature, but that also allows the cleaning chamber to have a pressure above the surrounding pressure, thus allowing the carbon dioxide to be applied to the surface with a desired predetermined pressure.
  • sealing means 47 may for example be rubber sealings, brush sealing etc., which will be obvious to the skilled person.
  • the application head may be provided with heating means 58 located on the application head, e.g. inside the cleaning chamber 48 as illustrated in order to provide an advantageous temperature in the cleaning chamber in order to provide a desired cleaning condition, e.g. in order to allow the carbon dioxide to be applied to the surface with a specific temperature.
  • heating means 58 located on the application head, e.g. inside the cleaning chamber 48 as illustrated in order to provide an advantageous temperature in the cleaning chamber in order to provide a desired cleaning condition, e.g. in order to allow the carbon dioxide to be applied to the surface with a specific temperature.
  • Such heating means 58 may for example be electric heating means that is supplied with electric power via supply lines that are generally designated 42 and may also comprise tubing for providing carbon dioxide to the nozzles 50. It should be mentioned that although two such nozzles 50 are shown in fig. 3, only one may be provided in the application head 30, or more than two may be provided, depending on the size, the application and the design in general of the application head 30 and the complete apparatus.
  • mechanical cleaning means in the form of a rotating brush or brushes 56 are also provided for supplementing the cleaning effect of the carbon dioxide.
  • the mechanical cleaning means may be designed in order to treat the surface before it is treated with carbon dioxide or after it is treated with carbon dioxide.
  • Other configurations are also possible, e.g.. carbon dioxide nozzles placed on both sides of the mechanical cleaning means or vice versa.
  • means for removing the applied carbon dioxide, the dissolved and dislodged dirt, etc. is provided in the form of a suction tube 54.
  • This tube 54 may lead to means for reusing the carbon dioxide, or the carbon dioxide may be allowed to escape into free air.
  • FIG. 4 A schematic overview of an apparatus according to further embodiments of the invention is shown in fig. 4.
  • the application head 30 is shown schematically with the cleaning chamber 48, which is provided with cleaning or solvating carbon dioxide in e.g. pressurized and liquefied form from a container 36, which may be a gas bottle, a container, or a battery of such bottles or containers.
  • the carbon dioxide may be supplied directly to the cleaning chamber, where as explained above the temperature may be controlled by heating means 58 and the pressure is maintained at a certain level caused by the sealing effect of the shielding means 46 and the sealing means 47 that provide efficient sealing to the surface of e.g. a rotor blade.
  • the apparatus may be provided with pumping means 64 in order to increase the pressure with which the carbon dioxide is provided, and further, heating means 66 may be provided for increasing the temperature of the liquefied carbon dioxide before it reaches the application head 30.
  • heating means 66 may be provided for increasing the temperature of the liquefied carbon dioxide before it reaches the application head 30.
  • the carbon dioxide may be allowed to escape into free air after use, but the carbon dioxide may be led to separator 68, where the dissolved or dislodged dirt etc. may be separated and accumulated 69 for disposal, waste treatment etc.
  • a filter 60 e.g., an activated carbon filter, may also be provided to further purify the carbon dioxide, and the carbon dioxide may be led to a condenser 62, where the carbon dioxide may be returned to liquid state, e.g. by cooling, in order to be reused in the circuit as indicated.
  • the apparatus has been described in connection with manual handling, but obviously, the apparatus may be employed in a more or less automated manner, e.g. controlled by a person situated at ground level. This may be put into practice in numerous manners, which will be obvious to a skilled person. In the following, some of these will be illustrated.
  • Fig. 5 shows a wind turbine corresponding to the wind turbine shown in fig. 1.
  • a vehicle 8 is parked at the root of the tower 2, and anchoring means shown in schematic form and generally designated 72 have been provided at the top of the wind turbine. From here, wires 21 are led down to the vehicle 8, which wires serve to guide and/or transport a carrier arrangement 70 up and down.
  • This carrier arrangement serves to carry at least one application head constructed in general corresponding to the application head described above and the necessary equipment, e.g. containers for carbon dioxide etc., even though it will be understood that some of this equipment may be located at ground level.
  • This system may be controlled from ground level, and means for, e.g. monitoring and inspecting the progress of the cleaning operation is provided in the form of a vision system, e.g. one or more video cameras (not shown) mounted on the carrier arrangement 70 and connected to display means in or at the vehicle 8. Further, such vision systems may be arranged to perform an automatic control of the operation of the apparatus.
  • Fig. 6 shows a similar carrier arrangement 70 as shown in fig. 5, suspended from anchoring means via wires 21. This carrier arrangement 70 is designed to climb up and down the wires 21, and as described above it may carry one or more application heads for performing a cleaning operation using carbon dioxide.
  • the carrier arrangement 70 may be designed as a part that provides sealing to the rotor blade 5 and thus provides a cleaning chamber that may be shaped as a ring or that may comprise an elongated chamber on each side of the rotor blade, whereby essentially the complete width of the rotor blade may be cleaned while the carrier arrangement travels up or down the rotor blade.
  • vision equipment will preferably be provided at the carrier arrangement 70.
  • Fig. 7 illustrates schematically an example of such an arrangement.
  • the carrier arrangement 70 is shown featuring several treatment zones, e.g. the illustrated zones 81, 82 and 83.
  • the zones 81 and 83 have been designed as areas with a number of nozzles or the like, which may spray carbon dioxide in any form, e.g. as dry ice pellets, in gaseous, liquid, supercritical or near- supercritical form, onto the surface of the rotor blade 5, and the zone 82 has been designed as a zone for mechanical cleaning, e.g. using rotating brushes.
  • Such a brushing zone may comprise a rotating brush positioned on each side of the rotor blade.
  • Such a rotating brush may be designed with a longitudinally extending middle part, upon which a number of long bristles may be located extending radial outwards.
  • the brush may be positioned with its longitudinal axis across the carrier 70 so that the bristles will brush the surface of the rotor blade, once the brush is rotated.
  • the carrier 70 comprises actuators, for instance electric motors, for driving the brushes, and potentially means for adjusting the distance to the rotor blade, if necessary. Sealing means will be positioned at the ends of the carrier arrangement 70.
  • the cleaning may be performed by means of dry ice blasting, i.e. a blasting method using small, compact dry ice pellets as a blasting material.
  • These pellets or ice crystals are made by letting pressurized carbon dioxide (CO 2 ), e.g. liquefied CO 2 escape through a nozzle whereby the liquid CO 2 is transformed to small pellets or crystals.
  • CO 2 pressurized carbon dioxide
  • These pellets may be accelerated in a jet of compressed air, e.g. similar to ordinary blasting methods, towards the surface, whereby a cleaning of the surface is performed.
  • the speed of the pellets may be adjusted and controlled by means of the compressed air, e.g. by adjusting the pressure, by controlling the throttling of the compressed air etc.
  • the source of the CO 2 may be pressure containers that may be supported by the apparatus located on the rotor blade (or the tower) or that may be located on the vehicle or on the vessel.
  • the source of compressed air or the like may preferably be an air compressor situated on the vehicle or on the vessel.
  • the nozzles for blasting the dry ice pellets and preferably the container for carbon dioxide need to be located at the apparatus placed above ground level at the part of the wind turbine, e.g. the rotor blade, that is to be treated, e.g. cleaned.
  • the compressor for supplying the compressed air can be located at the ground, on the vehicle or on the vessel (in case of sea-based wind turbines), and one or more tubes can be connected to the nozzles.
  • the source of carbon dioxide e.g. containers for liquefied carbon dioxide, can be placed at the ground, on the vehicle or on the vessel and connected to the nozzles by means of tubes etc.
  • the necessary control equipment may also be located here. Such an arrangement will be able to provide effective cleaning of wind turbine parts, e.g. rotor blades, even at a considerable height, e.g. 100 meter above ground level and above, which has been confirmed by extensive testing.
  • the nozzles for blasting of the ice pellets e.g. the dry ice pellets may preferably be configured for being arranged controllably in relation to the surface, e.g. for being movably in the horizontal and/or the vertical direction in order to cover all parts of the surface.
  • a number of advantages are achieved when this method is used for cleaning the surface of a rotor blade.
  • the cleaning is very effective, e.g. caused by the high cleaning speed and the nature of the dry ice pellets.
  • the cleaning method is environmental-friendly since the dry ice is non-toxic (CO 2 is a natural part of the atmosphere) and since no waste material, e.g. water, cleaning solutions, blasting material remains etc. is produced apart from the dislodged dirt.
  • the surface treatment is non-abrasive and gentle to the surface of the rotor blade. Further, the transporting of a substantial amount of water and/or other cleaning agents, e.g. to the wind turbine site and to the apparatus located above ground level, e.g. on the rotor blade, is avoided.
  • the apparatus according to the invention need not be designed for carrying such heavy loads. Also, it is noted that with this method it is possible to adjust the treatment, e.g. the cleaning procedure to the surface in question by regulating the blasting pressure, e.g. the compressed air by means of which the dry ice pellets are blasted towards the surface.
  • the treatment e.g. the cleaning procedure to the surface in question by regulating the blasting pressure, e.g. the compressed air by means of which the dry ice pellets are blasted towards the surface.
  • Cleaning with dry ice pellets may be used independently or may be combined with other cleaning methods.
  • an apparatus according to the invention may be provided with other equipment, for instance equipment for control and/or inspection of the rotor blade, to determine the condition of the fibre glass surface etc.
  • equipment for instance equipment for control and/or inspection of the rotor blade, to determine the condition of the fibre glass surface etc.
  • Such equipment may as explained above comprise vision equipment which may also serve for guiding for the apparatus, for detecting the degree of surface soil etc.
  • the apparatus may be provided with lighting equipment so that utilization of the apparatus according to the invention at all times of day and around the year is made easier.
  • a phase diagram for carbon dioxide is illustrated in fig. 8. Here, the different phases of carbon dioxide are shown, and the critical point for transition to the supercritical state is indicated, i.e. at a temperature of app. 31°C and a pressure of app. 73 bars.
  • Apparatus for treatment for instance washing of rotor blade; washing robot

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning In General (AREA)

Abstract

L'invention concerne un procédé et un appareil pour le traitement, notamment le nettoyage, d'une surface d'une partie d'une éolienne, telle qu'une pale rotor ou une tour. Un appareil et/ou une plate-forme est/sont placées, de sorte qu'il/elle puisse se déplacer par rapport à la surface, et un processus de nettoyage est mis en oeuvre sur au moins une partie de ladite surface par l'appareil et/ou une personne se trouvant sur ladite plate-forme, alors que l'appareil et/ou la plate-forme est/sont déplacé(e)s en plusieurs fois et/ou en continu. Ce nettoyage s'effectue au moyen de dioxyde de carbone (CO2), par exemple par l'envoi d'un flux de dioxyde de carbone (CO2) à au moins une buse se trouvant dans une tête d'application. Le procédé de l'invention permet un nettoyage efficace et sans danger pour l'environnement.
PCT/DK2004/000845 2003-12-04 2004-12-06 Procede et appareil pour le traitement d'une partie d'une eolienne WO2005054672A1 (fr)

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DKPA200301791 2003-12-04
DKPA200301791 2003-12-04

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008009352A1 (fr) * 2006-07-20 2008-01-24 Repower Systems Ag Arrangement d'un dispositif de levage sur une pale de rotor d'une installation d'énergie éolienne et procédé correspondant
WO2008090246A1 (fr) * 2007-01-26 2008-07-31 Marco Antonio Rio Orta Plate-forme semi-automatique de peinture de tours d'éoliennes
WO2009146753A1 (fr) * 2008-06-06 2009-12-10 Herbert Schneeweis Équipement de nettoyage
WO2010112032A1 (fr) * 2009-04-02 2010-10-07 Lm Glasfiber A/S Plateforme de travail
CN101920252A (zh) * 2009-06-16 2010-12-22 通用电气公司 用于对风力涡轮机转子叶片进行清洁和除冰的方法和装置
ES2362526A1 (es) * 2009-03-10 2011-07-07 Jose Antonio Ávila Espigares Torre andamio, reparadora - limpiadora para aerogeneradores eólicos.
US8057605B2 (en) * 2008-07-23 2011-11-15 Gallegos Frank J Wind turbine tower washing apparatus and method
CN102553844A (zh) * 2010-12-22 2012-07-11 上海艾郎风电科技发展有限公司 用于风力发电叶片的收胶装置
WO2012140278A1 (fr) * 2011-04-14 2012-10-18 Mantenimientos Eléctricos Campo De Aviación, S.L. Tour échafaudage réparatrice-nettoyeuse pour éoliennes
US8641374B2 (en) 2010-06-30 2014-02-04 Vestas Wind Systems A/S Cleaning and inspecting apparatus for wind turbine and related methods
EP2730344A1 (fr) * 2012-11-08 2014-05-14 Linde Aktiengesellschaft Procédé et dispositif destinés à supprimer une impureté d'une surface
CN101619707B (zh) * 2008-07-03 2014-05-14 通用电气公司 用于风力涡轮叶片的擦拭器
CN104819108A (zh) * 2015-05-15 2015-08-05 湖南大学 一种风力发电机塔筒外壁维护施工装置
CN106014881A (zh) * 2016-07-06 2016-10-12 国电联合动力技术有限公司 一种风力发电机叶片清洁装置及其使用方法
DK201570881A1 (da) * 2015-05-26 2017-01-30 Blade Repair Solutions Ivs Fremgangsmåde til etablering af erosionsbestandig overfladedel på en vindmøllevinge, fremgangsmåde til dannelse af en erosionsbestandig belægning, vindmøllevinge med eftermonteret belægning i og omkring områder hvor vingen er særligt udsat for erosionsskader, belægning til montering på en vindmøllevinges forkant.
CN109899250A (zh) * 2019-03-04 2019-06-18 徐春 一种风力发电机
US10718317B2 (en) 2015-10-09 2020-07-21 Vestas Wind Systems A/S Wind turbine blade surface treatment apparatus
US11020772B2 (en) 2019-02-05 2021-06-01 William F. Crunk System and method for cleaning wind turbine blades and solar panels

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WO2000070140A1 (fr) * 1999-05-12 2000-11-23 Linde Gas Ag Dispositif de nettoyage et procede de nettoyage avec des gaz liquefies ou surcritiques
DE19938478A1 (de) * 1999-08-13 2001-03-08 Schwemle Gmbh Vorrichtung zum Bearbeiten einer beliebigen Fläche

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Publication number Priority date Publication date Assignee Title
US3195166A (en) * 1963-07-24 1965-07-20 John A Wisner Wall washing apparatus
US4286417A (en) * 1979-08-08 1981-09-01 Robert T. Nelson Blasting machine with position sensing and adjustment
US5415584A (en) * 1993-09-21 1995-05-16 Tomco2 Equipment Company Particle blast cleaning apparatus
DE19726408C1 (de) * 1997-06-21 1999-03-18 Gerhard Reineke Schlosserei Un Arbeitsbühne
DE19909698A1 (de) * 1998-09-22 2000-04-13 Siebert Antonius J Vorrichtung zur Durchführung von Reparatur- und Serviceleistungen insbesondere an Rotorblättern von Windkraftanlagen
WO2000070140A1 (fr) * 1999-05-12 2000-11-23 Linde Gas Ag Dispositif de nettoyage et procede de nettoyage avec des gaz liquefies ou surcritiques
DE19938478A1 (de) * 1999-08-13 2001-03-08 Schwemle Gmbh Vorrichtung zum Bearbeiten einer beliebigen Fläche

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008009352A1 (fr) * 2006-07-20 2008-01-24 Repower Systems Ag Arrangement d'un dispositif de levage sur une pale de rotor d'une installation d'énergie éolienne et procédé correspondant
WO2008090246A1 (fr) * 2007-01-26 2008-07-31 Marco Antonio Rio Orta Plate-forme semi-automatique de peinture de tours d'éoliennes
WO2009146753A1 (fr) * 2008-06-06 2009-12-10 Herbert Schneeweis Équipement de nettoyage
CN101619707B (zh) * 2008-07-03 2014-05-14 通用电气公司 用于风力涡轮叶片的擦拭器
US8057605B2 (en) * 2008-07-23 2011-11-15 Gallegos Frank J Wind turbine tower washing apparatus and method
ES2362526A1 (es) * 2009-03-10 2011-07-07 Jose Antonio Ávila Espigares Torre andamio, reparadora - limpiadora para aerogeneradores eólicos.
US9624901B2 (en) 2009-04-02 2017-04-18 Lm Glasfiber A/S Work platform
CN102388218A (zh) * 2009-04-02 2012-03-21 艾尔姆玻璃纤维制品有限公司 作业平台
WO2010112032A1 (fr) * 2009-04-02 2010-10-07 Lm Glasfiber A/S Plateforme de travail
CN101920252A (zh) * 2009-06-16 2010-12-22 通用电气公司 用于对风力涡轮机转子叶片进行清洁和除冰的方法和装置
EP2278158A3 (fr) * 2009-06-16 2015-08-19 General Electric Company Procédé et appareil pour nettoyer et dégivrer des pales de rotor d'éolienne
US8062431B2 (en) * 2009-06-16 2011-11-22 General Electric Company Method and apparatus for cleaning and de-icing wind turbine rotor blades
US8641374B2 (en) 2010-06-30 2014-02-04 Vestas Wind Systems A/S Cleaning and inspecting apparatus for wind turbine and related methods
CN102553844A (zh) * 2010-12-22 2012-07-11 上海艾郎风电科技发展有限公司 用于风力发电叶片的收胶装置
WO2012140278A1 (fr) * 2011-04-14 2012-10-18 Mantenimientos Eléctricos Campo De Aviación, S.L. Tour échafaudage réparatrice-nettoyeuse pour éoliennes
EP2730344A1 (fr) * 2012-11-08 2014-05-14 Linde Aktiengesellschaft Procédé et dispositif destinés à supprimer une impureté d'une surface
CN104819108A (zh) * 2015-05-15 2015-08-05 湖南大学 一种风力发电机塔筒外壁维护施工装置
DK201570881A1 (da) * 2015-05-26 2017-01-30 Blade Repair Solutions Ivs Fremgangsmåde til etablering af erosionsbestandig overfladedel på en vindmøllevinge, fremgangsmåde til dannelse af en erosionsbestandig belægning, vindmøllevinge med eftermonteret belægning i og omkring områder hvor vingen er særligt udsat for erosionsskader, belægning til montering på en vindmøllevinges forkant.
WO2017114528A1 (fr) * 2015-05-26 2017-07-06 Blade Repair Solutions Ivs Procédé d'établissement d'une partie de surface résistante à l'érosion sur une pale d'éolienne, procédé de création d'un revêtement résistant à l'érosion, pale d'éolienne avec revêtement modifié dans et autour de zones où la pale est particulièrement exposée aux dommages dus à l'érosion, revêtement pour montage sur un bord avant de pale d'éolienne
US20190001534A1 (en) * 2015-05-26 2019-01-03 Blade Repair Solutions Ivs Method For Establishing Of Erosion Resistant Surface Part On A Wind Turbine Blade, Method For Creation Of An Erosion Resistant Coating, Wind Turbine Blade With Retrofitted Coating In And Around Areas Where The Blade Is Especially Exposed To Erosion Damages, Coating For Mounting On A Wind Turbine Blade's Front Edge
JP2019504964A (ja) * 2015-05-26 2019-02-21 ブレイド リペア ソリューションズ アイヴィエス 風力タービンブレード上に耐浸食性表面部を形成する方法、耐浸食性コーティングを形成する方法、ブレードが浸食損傷に特に暴露される領域内およびその周りに改装コーティングを施した風力タービンブレード、風力タービンブレード前縁に取り付けるためのコーティング
US11065789B2 (en) 2015-05-26 2021-07-20 Blade Repair Solutions Ivs Method for establishing of erosion resistant surface part on a wind turbine blade, method for creation of an erosion resistant coating, wind turbine blade with retrofitted coating in and around areas where the blade is especially exposed to erosion damages, coating for mounting on a wind turbine blade's front edge
US10718317B2 (en) 2015-10-09 2020-07-21 Vestas Wind Systems A/S Wind turbine blade surface treatment apparatus
CN106014881A (zh) * 2016-07-06 2016-10-12 国电联合动力技术有限公司 一种风力发电机叶片清洁装置及其使用方法
US11020772B2 (en) 2019-02-05 2021-06-01 William F. Crunk System and method for cleaning wind turbine blades and solar panels
CN109899250A (zh) * 2019-03-04 2019-06-18 徐春 一种风力发电机

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