EP3469146A1 - Brush for collecting oil from water using a collection device and a corresponding collection device - Google Patents
Brush for collecting oil from water using a collection device and a corresponding collection deviceInfo
- Publication number
- EP3469146A1 EP3469146A1 EP17809793.7A EP17809793A EP3469146A1 EP 3469146 A1 EP3469146 A1 EP 3469146A1 EP 17809793 A EP17809793 A EP 17809793A EP 3469146 A1 EP3469146 A1 EP 3469146A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brush
- bristle bunches
- fibres
- bristle
- bunches
- 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- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000000835 fiber Substances 0.000 claims abstract description 42
- 238000005452 bending Methods 0.000 claims description 5
- 229920000728 polyester Polymers 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 72
- 238000002788 crimping Methods 0.000 description 4
- -1 for example Substances 0.000 description 4
- 238000007667 floating Methods 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B5/00—Brush bodies; Handles integral with brushware
- A46B5/06—Brush bodies; Handles integral with brushware in the form of tapes, chains, flexible shafts, springs, mats or the like
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B13/00—Brushes with driven brush bodies or carriers
- A46B13/001—Cylindrical or annular brush bodies
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B9/00—Arrangements of the bristles in the brush body
- A46B9/06—Arrangement of mixed bristles or tufts of bristles, e.g. wire, fibre, rubber
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46D—MANUFACTURE OF BRUSHES
- A46D1/00—Bristles; Selection of materials for bristles
- A46D1/02—Bristles details
- A46D1/0253—Bristles having a shape which is not a straight line, e.g. curved, "S", hook, loop
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B15/00—Cleaning or keeping clear the surface of open water; Apparatus therefor
- E02B15/04—Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
- E02B15/10—Devices for removing the material from the surface
- E02B15/104—Conveyors; Paddle wheels; Endless belts
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B2200/00—Brushes characterized by their functions, uses or applications
- A46B2200/40—Other application
- A46B2200/405—Brush used for purposes that are not conventional brushing, e.g. holder or support
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
Definitions
- the invention relates to a brush for collecting oil from water using a collection device, which brush includes
- a body arranged to form a circle and arranged to be supported around the rotation shaft of a collection device, which body includes an outer surface
- bristle bunches of bristles comprising several individual brush fibres attached to the outer surface to collect oil, each of which brush fibre has two ends, i.e. a base end and a free end, which bristle bunches include first bristle bunches and second bristle bunches, of which the second bristle bunches are greater in length between the ends of the brush fibres than the first bristle bunches, which bristle bunches form a continuous brush surface on the brush .
- the invention also related to a corresponding collection device for collecting oil from water in a machine-aided manner.
- FI 125029 B discloses a collection device according to the prior art for collecting oil form the surface of water.
- the collection device includes a rotating brush, which collects oil from the surface of the water into the brush fibres, and a scraper, which collects the oil from the brush fibres into a receptacle. Bristle bunches of even length or different length, which are straight in the direction of the radius of the cross-section of the body of the brush, are used in the brush.
- a drawback of such a collection device is the limited ability of the brush to bind oil to itself, as particularly low-viscosity oils flow more easily back into the water from the surface of the brush fibres before the brush fibres come into contact with the oil-collecting scraper. Thus the collection efficiency of the collection device remains deficient.
- publications WO 2007/071813 Al and EP 0069496 Al which disclose a brush that comprises bristle bunches of two differently sized straight bristles. The differently-sized bristle bunches form recesses in the surface of the brush for removing water. Such brushes are not, however, particularly effective in collecting oil.
- the invention is intended to create a more effective brush than brushes of the prior art for collecting oil from water using a collection device.
- the characteristic features of the present invention are stated in the accompanying Claims 1.
- the invention is also intended to create a more effective collection device than a collection device of the prior art for collecting oil from water in a machine-aided manner.
- the characteristic features of the present invention are stated in the accompanying Claim 16.
- a brush for collecting oil from water using a collection device which brush includes a body arranged to form a circle and arranged to be supported around the rotation shaft of the collection device, which body includes an outer surface.
- the brush includes bristle bunches consisting of several individual brush fibres, attached to the outer surface for collecting oil, each of which brush fibres has two ends, i.e. a base end and a free end.
- the bristle bunches include first bristle bunches and second bristle bunches, of which the second bristle bunches are longer over the distance between the brush fibres free ends and the outer surface of the body than the first bristle bunches.
- the bristle bunches form a continuous brush surface on the brush.
- the brush fibres are bent over a selected length in a selected direction, which direction differs from the direction of the brush fibres over the rest of the length of the bristle bunch and which selected length is greater than the length of the first bristle bunches from the outer surface of the body.
- the greater oil-collection efficiency of the brush according to the invention compared to brushes of the prior art is based on the fact that, when the brush rotates, to the direction of the trough-like structure formed by the bent brush fibres of the second bristle bunches, the through-like structure collects oily water into itself.
- the second bristle bunches increase the total surface area of the brush's brush fibres and in turn the surface area to which oil can adhere by capillary action with the aid of adhesion between the brush fibres. If the brush is rotated in the opposite direction, then the increase in total surface area caused by the second bristle bunches leads to an increase in the oil-collection efficiency.
- reference to the length of the second bristle bunches in a direction at right-angles to the brush surface means that the brush fibres of the second bristle bunches extend farther from the brush body that the brush fibres of the first bristle bunches forming the brush surface, even though the brush fibres of the second bristle bunches can be at an angle deviating from at a right angle relative to the body.
- the brush fibres in the second bristle bunches are bent in the selected direction of the brush at a point in the brush fibres that is farther from the body than the brush surface.
- the bent brush fibres of the second bristle bunches lift oil from the surface of the water into the trough-like structure parallel to the shaft of the brush, formed between them and the continuous brush surface.
- the oil is lifted efficiently from the water, as the continuous brush surface formed by the first bristle bunches fills rapidly with oil and limits the oil-collection capacity. This also prevents low-viscosity oils from escaping quickly between the brush fibres, as the bent brush fibres of the second bristle bunches collect oil in the trough parallel to the brush shaft, formed in the bend in the brush fibres.
- the selected direction is preferably the direction of rotation. The ability of the trough-like structure of the second bristle bunches to collect effectively oily water can then be exploited.
- the second bristle bunches can be 1.5 - 3 times, preferably 2.0 - 2.5 times the length of the first bristle bunches.
- the second bristle bunches will then be sufficiently long for the bend formed in them to lie outside the continuous brush surface, but on the other hand sufficiently short so that the second bristle bunches do not overlap each other on the circle formed by the brush body.
- the second bristle bunches can be bent at an angle of 40 - 90° relative to the longitudinal direction of the other bristle bunches, in order to form the trough-like structure for collecting oil against the brush surface.
- a trough-like structure is then formed outside the continuous brush surface and the bent parts of the brush fibres of the second bristle bunches are at such an angle that they also prevent oil from flowing out of the trough-like structure immediately the oil is lifted from the level of the water surface.
- the point of bending of the brush fibres of the second bristle bunches can be at a distance from the base end of the brush fibres which corresponds to 20 - 80 % of the length of the brush fibres between the base end and free end of the brush fibres of the bristle bunch .
- the individual brush fibres in the second bristle bunches are preferably of polyester. Polyester retains its shape, to which it has been formed in the manufacturing stage, which is especially important in the bent second bristle bunches, so that the trough-like structure will remain, despite the stress of the scraper.
- the brush fibres should be sufficiently stiff to be able to be able to resist the mass of the oil adhering to the trough-like structures formed by the second bristle bunches when the trough-like structure lifts oil from the surface of the water.
- the body is preferably one of the following: a brush drum, a brush belt, or a chain consisting of body elements.
- the body formed as a brush drum is symmetrical it is easy to manufacture and can have an inflexible structure.
- the number of bristle bunches can be greater that in a brush drum, permitting a greater amount of oil to bind at a time to the brush.
- a brush belt also permits the scraper to be placed higher above the surface of the water. The body elements are easily replaced and the whole brush need not be rejected if some of the bristle bunches have become unusable.
- the ratio of the second bristle bunches to the first bristle bunches is arranged to be such that, in the direction of rotation of the brush, a gap remains between the consecutive second bristle bunches, to lead oil to the trough-like structure.
- the length of the portion of the brush fibres of the second bristle bunches bent in the direction of the circumference of the brush is also arranged to be such that a gap is formed.
- the ratio of the second bristle bunches to the first bristle bunches and the length of the portion of the second bristle bunches bent in the direction of the circumference of the brush are arranged to be such that the second bristle bunches do not overlap each other.
- the ratio of the second bristle bunches to the first bristle bunches can be 1:4 - 1:8. If, on the other hand, the length of the bent portion of the second bristle bunch is 20 % of the length of a brush fibre of the second bristle bunch, the ratio of the second bristle bunches to the first bristle bunches can be 1:2 - 1:4.
- the bristle bunches are preferably attached perpendicularly to the body of the brush.
- the bent second bristle bunches will then form trough-like structures with a greater volume for collecting oil.
- the diameter of the brush fibre can be, in the case of the first bristle bunches, 0.3 mm - 8.00 mm, preferably 0.5 - 1.5 mm and, in the case of the second bristle bunches, 0.7 mm - 10.00 mm, preferably 1.0 - 2.0 mm, with the diameter of the brush fibre increasing in step with the viscosity of the oil being collected. A sufficiently large surface area will then be obtained for low-viscosity fluid oils, so that the oil adheres effectively between the brush fibres by adhesion.
- the brush fibres of the second bristle bunches will achieve a sufficient stiffness not to bend due to the forces created by the oil being lifted, in the opposite direction to the direction of travel of the brush when lifting oil .
- the length of the bristle bunch can be 30 mm - 500 mm, preferably 50 - 200 mm.
- the term length refers to the distance between the base end and the free end of the brush fibre.
- the number of free ends of the brush fibres of a bristle bunch can be 20 - 200, preferably 38 - 60 items. This number is preferably reached by bending 10 - 30 fibres in two and attaching them at the bend to the body of the brush by punching, according to the prior art.
- the number of brush fibres is also affected by the size of the bristle hole and the thickness of the brush fibre, which are selected according to the desired result.
- the length, in the direction of the tangent of the brush, of the trough-like structure formed by the second bristle bunches can be 15 - 45 mm.
- the diameter of the brush can be preferably 0.2 - 2.5 m.
- the choice of diameter of the brush is affected by the available collection device and its construction.
- 35 - 65 % of the surface area of the brush body is preferably free in order to remove water, the rest of the surface area being covered by brush fibres. Sufficient space will then remain in the gap of the brush fibres for the water to escape between the brush fibres .
- the second bristle bunches are preferably bent at a distance from the base end of each brush fibre, which distance is 5 - 20-mm greater than the distance of the free ends of the first bristle bunches from the outer surface of the body.
- the brush fibres are preferably punched in bristle bunches into the body, when the perforation made in the body for the bristle bunches can be patterned to create addition effectiveness.
- a continuous brush surface means a brush surface, in which there are no areas that are completely empty of bristles, though the brush itself can be assembled from separate consecutive parts and have a helically arranged structure .
- At least some of the brush fibres are preferably crimped to increase the collection capacity.
- the bottoms of the crimping forms cups, to which the oil can adhere .
- the bristle bunches are preferably attached to the body at such a distance from each other that the bristle bunches touch each other in the brush surface.
- the brush surface is made to be continuous .
- the brush fibres in the second bristle bunches can be bent into a curve of the radius of a circle, in such a way that the direction of the base end of the brush fibre is at 40 - 90° relative to the direction of the free end of the brush fibre.
- the term bending means that the brush fibres may have been either physically bent from straight brush fibres into bent brush fibres, or alternatively the brush fibres may have been formed already in the same shape that would have been achieved through bending.
- the structure according to the invention can be scaled from small brushes with a diameter of ten centimetres up to brushes with a diameter of two metres.
- the dimensioning of the brushes is then naturally also scaled correspondingly in the case of the brush fibres' length, thickness, and number, whereas, for example, the depth of the trough-like structure and the length of the parts of the bent brush fibres of the second bristle bunches remain essentially the same.
- the dimensions of the brush also change according to the viscosity of the oil being collected, heavier oil fractions requiring greater fibre thicknesses to achieve sufficient stiffness.
- the intention of the collection device according to the invention can be achieved by means of a collection device for collecting oil from water mechanically, which collection device includes a frame for suspending the collection device from a base, at least one brush for collecting oil from water suspended with the aid of its rotation shaft from the said frame, operating devices for rotating the said brush in the frame, a receptacle for holding the collected oil, and a scraper arranged in connection with the brush for scraping the oil from the brush into the receptacle.
- the brush includes a body arranged to form a rotation for attaching the body around the rotation shaft of the brush device and bristle bunches consisting of the several individual brush fibres attached to the outer surface belonging to the body for collecting oil, each of which brush fibre has two ends, i.e.
- the bristle bunches include first bristle bunches and second bristle bunches, of which the second bristle bunches are longer in length between their ends than the first bristle bunches, which bristle bunches form a brush with a continuous unified brush surface.
- the brush fibres are bent over a selected length in a selected direction, which direction differs from the direction of the brush fibre over the length of the rest of the brush fibre.
- the selected direction, in which the second bristle bunches are bent, is preferably the direction of rotation of the brush.
- the bent brush fibres of the second bristle bunches then form a trough-like structure, in which oil travels effectively to the scraper .
- the angle of the scraper relative to the radial direction of the brush can be 20 - 45°, preferably in such a way that the point of the scraper points in the direction of the tangent of the brush.
- the oil that has collected on top of the scraper will then flow by gravity from the scraper into the receptacle.
- the point of the scraper preferably travels close to the brush body, at a distance of about 10 - 20 mm from the body, and the base of the spikes belonging to the scraper is at a distance from the body of about 40 - 60 % of the length of the first bristle bunches .
- the brush can be arranged to be rotated at a circumferential velocity of 20 - 200 mm/s, preferably 50 - 100 mm/s in the case of heavy oils. If the diameter of the body of the brush is about 500 mm, the rotational speed will then be 0.5 - 4 rpm. Heavy oil flows slowly from between the brush fibres of the second bristle bunches, so that the rotational speed can be quite low, thus assisting the cleaning of the brush fibres of the second bristle bunches by the scraper.
- the brush according to the invention can be arranged to be rotated at a rotational speed of as much as 10 - 20 rpm. With light oils, the rotational speed should be greater, so that the oil has not time to flow off the trough-like structure formed by the second bristle bunches.
- the operating devices are preferably arranged to rotate the brush at a circumferential velocity of 60 - 110 cm/s, to transfer the oil to the scraper.
- the circumferential velocity is of great importance, as at too great a circumferential velocity oil is splashed around the brush and, on the other hand, at too low a circumferential velocity it flows through the brush.
- the scraper is preferably a comb-like element arranged to push between the brush fibres as the brush rotates against the scraper.
- the scraper is then easy to implement and does not damage the brush fibres unlike, for example, pressing between rollers.
- the base is preferably a water-traffic vessel or a skimmer. These are highly suitable as bases for the collection device according to the invention.
- the operating devices for rotating the brush can be any of the following: an internal-combustion engine, an electric motor, a hydraulic motor, or a pneumatic motor.
- the length of the first and second bristle bunches and the brush fibres refers to their length between the outer surface of the body and the free end of the brush fibre, though the brush fibre itself could be attached bent in two to the body of the brush.
- Figure 1 shows a cross-section of a first embodiment of the brush according to the invention
- Figure 2 shows a cross-section of a second embodiment of the brush according to the invention
- Figure 3 shows a cross-section of a third embodiment of the brush according to the invention
- Figure 4 shows an axonometric view of a floating base, on which the collection device according to the invention is suspended,
- Figure 5 shows a cross-section of a first embodiment of the brush according to the invention, when oil is collected using the brush
- Figure 6 shows the brush of the first embodiment according to
- Figure 7 shows the brush of the first embodiment according to
- Figure 8 shows an axonometric view of the brush embodiment according to Figure 1 fitted to a roller
- FIG. 9 shows one variation of the brush embodiment of Figure
- Figure 10 shows a variation of the brush embodiment according to Figure 8.
- Figure 11 shows an axonometric view of a fourth variation of the embodiment of the brush according to the invention, fitted to a roller,
- Figure 12 shows an axonometric view of a variation of the embodiment of the brush according to the invention, fitted to a roller.
- Figure 1 shows a first embodiment of the brush according to the invention, in which a brush drum forms the body 12 of the brush 10.
- the brush 10 includes a body 12 forming an outline with a circular cross-section or circulated around two rollers, from which the brush 10 is supported around the rotation shaft 104 of the brush device, and several individual brush fibres 20 forming bristle bunches 22 attached to the outer surface 24 belonging to the body 12.
- Each brush fibre has a base end 44 attached to the outer surface 24 of the body 12 and a free end 48.
- the bristle bunches 22 form the brush surface 26 for the brush 10, which is continuous over the entire outer circumference of the brush 10.
- the brush fibres of the adjacent bristle bunches in the brush surface support each other in the direction of the tangent of the brush.
- the bristle bunches 22 include first bristle bunches 25 and second bristle bunches 28.
- the brush fibres 20 are longer than the brush fibres of the first bristle bunches 25 and the brush fibres 20 of the second bristle 28 are bent in the direction of rotation of the brush 10, thus forming a trough-like structure 30 against the brush surface 26.
- the trough-like structure 30 can have two open ends 21, which can be seen, for example in Figure 12.
- open end refers to the fact that at this point there are no brush fibres of a second bristle bunch to form an obstacle to the flow of water in the axial direction of the brush.
- the brush fibres 20 of the second bristle bunches 28 are bent at an angle of slightly less than 90° relative to the direction of the radius of the rotation shaft.
- a clearly trough-shaped structure 30, which is sufficiently deep to also retain oils with a high viscosity in the brush 10, is then formed between the bent brush fibres 20 of the second bristle bunches 28 and the brush surface 26.
- the term depth of the trough-like structure 30 refers to the distance of the end of the brush fibres 20 of the second bristle bunches 28 and the bends 34 from each other.
- the trough-like structure 30 preferably narrows towards the bend, so that the trough-like structure 30 has its "mouth open” when it meets the surface of the water, so that the oil collects on the inner surface of the trough-like structure.
- the oil cannot escape from the inner surface from the trough-like structure, when the second bristle bunches rises from the water.
- the brush has preferably been submerged in the water at least to the extent that each brush fibre remains under the surface of the water at some stage in its rotation. On the other hand, the brush is preferably submerged in the water at most up to its rotation shaft, so that the water has time to leave before the scraper.
- the brush fibres are bent in two in the holes in the brush body and attached using a metal staple.
- the positioning and frequency of the holes are affected by the dimensioning of the scraper and the viscosity of the oil to be collected.
- the brush fibres can also be permanently attached to the body as part of moulding, i.e. the brush fibres are attached to the body already when moulding it.
- rows of the brush fibres can be formed in cassettes, which are fed into corresponding counter-holes in the brush body.
- the bristle bunches are preferably fitted to the brush in essentially longitudinal rows, in each of which rows there are bristle bunches of a specific length.
- the rows can be set partly helically in the body, so that the bristle bunches meet the scraper at different times, which prevents vibrations from arising.
- the consecutive bristles are preferably slightly overlapping, to increase the brush's efficiency.
- Figure 2 shows a second embodiment of the brush according to the invention, in which the brush's 10 body is a brush belt.
- the body 12 forms an elongated circle 14, a kind of oval, at the ends of which are rotation shafts 104.
- the second bristle bunches 28 can be exactly the same as in the first embodiment of Figure 1.
- the brush according to the second embodiment the advantage is gained over the brush of the first embodiment that with it oil can be lifted farther from the water surface without increasing the size of the diameter of the rotation shaft.
- the brush can be placed vertically, so that one rotation shaft is below and the other above it, so that the scraper belonging to the collection device can be placed close to the upper rotation shaft.
- the brush fibres can be attached to the body correspondingly as in the embodiment of Figure 1, but, unlike the first embodiment, the body should be flexible, so that it will withstand the change in shape from curved to straight over the journey between the curve of the rotation shaft.
- the brush is also elongated, but the body 12 is formed of body elements 32 placed in a chain. At least one row of bristle bunches, or preferably two rows of bristle bunches 22 according to Figure 3 can be attached to each body element.
- the body elements 32 can, in turn, be attached, for example, to a belt, which is rotated around the rotation shafts 104.
- the individual brush fibres used in the brush can be of various fibrous materials such as, for example, polypropylene, polyester, or polyamide.
- the brush fibres of the second bristle bunches are, for their part, preferably of polyester, which retains its shape, which is important in connection with the bent brush fibres of the second bristle bunch.
- the bend made in the brush fibres of the second bristle bunches is preferably formed by heat treatment after inserting the bristles.
- the cross-section of an individual brush fibre can be round, oval, star-shaped, or some other shape suitable for the purpose, which increases the specific surface area of the brush fibre.
- the choice is affected, as is the choice of the brush fibre's diameter, by the viscosity of the oil to be collected.
- the fibre In the bristle bunch, the fibre can be straight or crimped, and in the second bristle bunch straight and bent or straight and crimped.
- the thinnest oil to be collected i.e. diesel
- the thinnest possible fibres are preferably used, preferably nylon fibres, which are crimped or have an oval-shaped or star-shaped cross-section. With the aid of crimping the brush fibres, the efficiency of the brush can be increased considerably, as the crimping forms pockets between the fibres, in which the collected oil remains .
- the material used in the body of the brush can be, for example, plastic, metal or a composite, depending on the embodiment and its requirements.
- the density of placing of the brush fibres of the bristle bunches of the brush must not be too great, to allow water to leave the brush before the scraper.
- the placing density of the brush fibres can be 0.5 - 2.5 mm, i.e. each brush fibre is at a distance of 0.5 - 2.5 mm from the adjacent brush fibre.
- the inner surface of the body includes attachment elements for locking the body around the rotation shaft, even though these are not shown in the figures.
- the attachment elements can be according to the prior art.
- FIG. 4 shows one embodiment of the collection device 100 according to the invention attached to a base.
- the collection device according to the invention is preferably attached to the side or in front of a floating vessel or skimmer acting as the base, when the flow of water caused by the floating vessel does not move the oily water out of the way of the collection device.
- the collection device includes a frame 102 arranged to be suspended from the vessel 200, at least one brush 10 for collecting oil from the water 300 and suspended from the frame 102 with the aid of a rotation shaft 104, operating devices for rotating the brush 10, a receptacle 108 for holding the collected oil, and a scraper 106 fitted in connection with the brush 10 for scraping oil from the brush 10 into the receptacle 108.
- the brush used in the collection device 100 is a brush according to the invention.
- the brush 10 is a brush 10 according to the second embodiment shown in Figure 2.
- the area for collection is preferably delimited using the guides 114 shown in the figure, so that the oily water is guided to the collection device.
- the scraper 106 is shown in greater detail in Figure 5, which also shows the oil 400 to be collected in the trough-like structures 30.
- the scraper 106 preferably includes a blade part 110, which lies nearly against the body 12 of the brush 10.
- the blade part 110 of the scraper 106 can be a comb-like element, through which the brush fibres 20 of the bristle bunches 22 travel as the oil detaches from the surfaces of the brush fibres to the blade part 110.
- the oil collected from the scraper 106 can flow into a receptacle 108.
- Figure 5 shows the preferred direction of rotation of the brush 10.
- FIG. 6 shows a brush 10 corresponding to the embodiment of the brush according to Figure 1, in which the second bristle bunches 28 are set more densely than in the brush 10 shown in Figure 1.
- the ratio of the number of second bristle bunches to that of the first bristle bunches can vary according to the length of the bent part of the second bristle bunches.
- the bristle bunches 22 between the second bristle bunches 28 can lengthen or shorten, in the direction of rotation, in the gap between two second bristle bunches 28.
- the lengthening can, according to Figures 7 and 9 be linear, or, according to Figure 10, stepped in the case of the adjacent first bristle bunches.
- the first bristle bunches can then include bristle bunches of several different lengths. The capacity of the trough-like structure formed by the second bristle bunches with the aid of the first bristle bunches of different lengths ban be increased, thus increasing the efficiency of the brush .
- the bristle bunches form bristle discs 40 and 42 transversely in the brush, of which some are traditional intermediate discs 40 equipped with bristle bunches of even length and some are bristle discs 42 containing second bristle bunches according to the invention.
- Such a more enclosed trough-like structure is particularly well suited to collecting oils with a specific viscosity. Recesses, which effectively collect oil, are formed in the trough-like structure.
- Figure 12 shows a roller-like brush 10, in which the consecutive second bristle bunches 28 in the longitudinal direction of the brush form rows 46, which are preferably at a slant relative to the longitudinal direction of the brush.
- the slant is preferably arranged in such a way that the slant is symmetrical relative to the centre point of the brush, so that V-shaped rows of second bristle bunches are formed in the brush, which collect oil in the centre of the brush or, alternatively, at the ends of the brush, depending on the direction of rotation of the brush.
- the term trough-like refers to the shape of a cylinder split in the direction of the axis of rotation, in which both ends are open to allow water to escape.
- the diameter of the brush's body is 800 mm (the body without brush strips and at the level of the brush surface has a diameter of 910 mm) .
- the material used in the brush fibres of the first bristle bunches of the brush can be polypropylene, the diameter of a brush fibre 0.4 mm and its length 40 mm.
- the material used in the longer brush fibres of the second bristle bunches can be polyethylene, when the diameter of a brush fibre is 0.5 mm and its length 80 mm.
- the second bristle bunches are preferably bent at a distance of 50 mm from the base end of each brush fibre.
- the brush can then be used for the collection of heavy oils.
- the brush is completely covered with bristles and the bristle bunches can be over a width of 480 mm on a body of 550 mm, so that measured at the brush surface the brush's diameter is 910 mm.
- the straight brush fibres can be crimped, but the crimping is very little relative to the fibre's thickness.
- the brush's surface area can be about 1.3 - 1.5 m .
- a rotating speed of 1 rpm was used, when the circumferential velocity was 48 mm/s, and using a brush with the aforementioned dimensioning an oil-collection capacity of 468 kg/h was achieved, which in terms of a square metre is 342 kg/m 2 /h of heavy fuel oil (POR 180, at a temperature of 20°C) .
- the comb-like scraper used is preferably set at an angle relative to the brush fibres striking it.
- the scraper there are as many gaps as there are bristle-bunch rows in the brush, i.e. in this case 32. In the scraper there are then 31 "comb" spikes, the width of the spikes being 80 mm.
- the use of the brush according to the invention achieves an oil-collection capacity of as much as 30 % more.
- the brush and collection device according to the invention can be used for collecting oils and oil-like chemicals from water in both fresh and sea-waters.
- the brush and collection device according to the invention can also be adapted for use in collecting other liquid impurities from water besides oil, as the operating principle of the second bristle bunches is also suitable for collecting other liquid impurities.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Brushes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20165474 | 2016-06-08 | ||
PCT/FI2017/050423 WO2017212117A1 (en) | 2016-06-08 | 2017-06-07 | Brush for collecting oil from water using a collection device and a corresponding collection device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3469146A1 true EP3469146A1 (en) | 2019-04-17 |
EP3469146A4 EP3469146A4 (en) | 2020-01-15 |
Family
ID=60578256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17809793.7A Withdrawn EP3469146A4 (en) | 2016-06-08 | 2017-06-07 | Brush for collecting oil from water using a collection device and a corresponding collection device |
Country Status (2)
Country | Link |
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EP (1) | EP3469146A4 (en) |
WO (1) | WO2017212117A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108082405A (en) * | 2018-01-22 | 2018-05-29 | 南通理工学院 | A kind of anti-pollution vessel |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110074733A (en) * | 2019-05-31 | 2019-08-02 | 苏州艾士德机械有限公司 | A kind of modular high-altitude cleaning machine people's brush device |
CN111573778A (en) * | 2020-04-29 | 2020-08-25 | 南京大学 | Electromagnetic heating drum-type recovery device for high-viscosity floating oil on water surface |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4112382C2 (en) * | 1991-04-16 | 2003-05-28 | Heinz Fritze | sweeper |
FI960779A (en) * | 1996-02-21 | 1997-10-18 | Mirja Tuulikki Maekinen | Oil spill response unit |
FI107280B (en) * | 1999-03-19 | 2001-06-29 | Jj Tekniikka Oy | Brush cleaning apparatus and scraping member |
FI125052B (en) * | 2005-12-21 | 2015-05-15 | Lamor Corp Ab | Brush Construction |
-
2017
- 2017-06-07 WO PCT/FI2017/050423 patent/WO2017212117A1/en unknown
- 2017-06-07 EP EP17809793.7A patent/EP3469146A4/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108082405A (en) * | 2018-01-22 | 2018-05-29 | 南通理工学院 | A kind of anti-pollution vessel |
Also Published As
Publication number | Publication date |
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WO2017212117A1 (en) | 2017-12-14 |
EP3469146A4 (en) | 2020-01-15 |
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