WO2008065233A1 - Method for manufacturing an absorption device and an absorption device - Google Patents

Method for manufacturing an absorption device and an absorption device Download PDF

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Publication number
WO2008065233A1
WO2008065233A1 PCT/FI2006/050529 FI2006050529W WO2008065233A1 WO 2008065233 A1 WO2008065233 A1 WO 2008065233A1 FI 2006050529 W FI2006050529 W FI 2006050529W WO 2008065233 A1 WO2008065233 A1 WO 2008065233A1
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WO
WIPO (PCT)
Prior art keywords
absorption
support material
support
absorption device
gauze
Prior art date
Application number
PCT/FI2006/050529
Other languages
French (fr)
Inventor
Heikki Rantanen
Heikki Huhtanen
Aarno Heinonen
Original Assignee
Manwell Ky
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 Manwell Ky filed Critical Manwell Ky
Priority to PCT/FI2006/050529 priority Critical patent/WO2008065233A1/en
Priority to EP06820108A priority patent/EP2097587A1/en
Publication of WO2008065233A1 publication Critical patent/WO2008065233A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/681—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water by addition of solid materials for removing an oily layer on water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28023—Fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28028—Particles immobilised within fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3206—Organic carriers, supports or substrates
    • B01J20/3208—Polymeric carriers, supports or substrates
    • B01J20/321—Polymeric carriers, supports or substrates consisting of a polymer obtained by reactions involving only carbon to carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3206—Organic carriers, supports or substrates
    • B01J20/3208—Polymeric carriers, supports or substrates
    • B01J20/3212—Polymeric carriers, supports or substrates consisting of a polymer obtained by reactions otherwise than involving only carbon to carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3214—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the method for obtaining this coating or impregnating
    • B01J20/3223—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the method for obtaining this coating or impregnating by means of an adhesive agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
    • B01J20/3268—Macromolecular compounds
    • B01J20/3272—Polymers obtained by reactions otherwise than involving only carbon to carbon unsaturated bonds

Definitions

  • the invention relates to a method for manufacturing an absorption device including support material and absorption material and an absorption device to be implemented by the method.
  • the absorption device according to the invention is especially suitable for absorbing oil and other oil-like chemicals.
  • Oil spill prevention ways are generally known in which absorption material is spread on surfaces fouled by oil. After absorption has taken place, the absorption material and oil absorbed in it are removed by suitable devices for further treatment. One has tried to facilitate the spreading and removing of absorption material by sealing the absorption material to bags or boxes of different shapes.
  • the object of the invention is to introduce a method for manufacturing an absorption device and an absorption device, by means of which it is possible to eliminate flaws and disadvantages related to known absorption devices.
  • an absorption device including support material and absorption material is manufactured.
  • the main role of the support material is to function as a cohesive material for the absorption device and the role of the absorption material is to absorb in itself liquid material, such as oil.
  • the basic idea of the invention is that a three-dimensional support material net maintaining the cohesion of the absorption material is formed of the support material by means of the heat treatment of the support material.
  • support material and absorption material are mixed in a specified ratio into a mixture of substantially uniform quality.
  • a blanket is formed on a base which blanket is heated to a temperature in which the support material softens and partially melts adhering to the absorption material.
  • the support material cools down, it hardens and forms a support material net maintaining the cohesion of the mixture.
  • it is possible to add in connection with mixing adhesive by means of which the cohesion of the absorption device is further improved.
  • a net-like gauze is first formed of the support material on which a layer of absorption material is proportioned. After this, the gauze is folded to a layer-like structure and heated to a temperature in which the support material softens and partially melts adhering to the absorption material. When the support material cools down, it hardens forming a support material net maintaining the cohesion of the layer-like structure.
  • said gauze is formed of support material in fibrous form by a carding technique. Successive gauzes can further be bound together by adhesive to be mixed to the absorption material and/or by needling. On the outer surface of the absorption device, it is possible to fasten a support gauze, if desired, which further improves the cohesion of the absorption device.
  • the support material includes natural fibre material, textile fibres, polyester and/or polypropylene.
  • the absorption material is advantageously fibrous or fine-grained natural material, such as peat or cellulose fibre.
  • the absorption material and/or the support material are biodegradable materials.
  • An advantage of the absorption device according to the invention is that it is reliable in operation, because the breaking of a point of the surface layer will not affect the operation of the other part of the absorption device nor lead to the breaking of the whole absorption device. Furthermore, an advantage of the absorption device according to the invention is that it is an absorption device maintaining its cohesion and shape well, which facilitates the handling, transport and storing of the absorption device and separating oil from the absorption device.
  • a further advantage of the absorption device according to the invention is that it has a uniform absorbing capacity.
  • Fig. 1 shows by way of an example the steps of a method according to the invention as a diagram.
  • Fig. 1 shows a simple diagram of the different steps of a method according to the invention.
  • a thin net-like gauze 10 is first manufactured of support material 8 in fibrous form by means of a carding technique.
  • Carding means here a treatment method of fibrous material known as such in which the material is brought to a gauze-like form.
  • the support material such as different natural fibres, polyester, polypropylene or their mixtures.
  • a thin layer of absorption material 12 in loose form is proportioned.
  • the absorption material is peat, refined recycled pulp or some other fine-grained material similar to the above. Also a mixture of several materials can be used as the absorption material.
  • the absorption material fills the holes of the net-like gauze and forms a thin layer on the gauze.
  • the absorption material it is possible, if desired, to add also adhesive which binds the absorption material particles to the gauze.
  • the adhesive, the absorption material and the support material are biodegradable materials.
  • the gauze-like support material and the absorption material are formed a thicker structure by folding, whereby individual gauze parts are set on top of each other in layers.
  • a layer-like structure 13 in which there are on top of the other several support material gauzes and between them absorption material layers.
  • a mat-like absorption device 14 is formed by binding the gauzes on top of each other and the absorption material layers between them together.
  • the support gauze is of textile fibre, such as natural fibre, polyester, polypropylene or a mixture of the above.
  • the binding of gauzes on top of each other is done by means of heat treatment.
  • the temperature of the layer-like structure is increased such that the gauze-like support material softens and partially melts.
  • the temperature of the layer-like structure can be increased to a desired level e.g. by hot air blowers.
  • Melted support material gauzes on top of each other are fastened to each other and form a three- dimensional net-like structure inside the absorption device which structure adheres to the surrounding absorption material.
  • a suitable temperature for the heat treatment is 150-170 0 C.
  • the absorption device After the heat treatment, the absorption device is let to cool back to the normal temperature.
  • the support material cools down, it hardens forming a three- dimensional support material net maintaining the cohesion of the absorption device, because of which the absorption device maintains its shape.
  • the absorption device 14 including support material and absorption material is manufactured by a so-called formatting method in which the fibrous support material 8 and the fine-grained absorption material 12 are mixed to each other in a suitable ratio, whereby a substantially homogeneous mixture of support material and absorption material is obtained. It is also possible to add adhesive to the mixture, if required.
  • a blanket is shaped on a suitable base for which the above-described heat treatment is performed. In the heat treatment, the temperature of the blanket is increased so high that the support material fibres soften and partially melt. After the support material has cooled down, a support material net maintaining the cohesion of the mixture is produced to the blanket, whereby the blanket becomes the absorption device 14 as described above.
  • the absorption device is used in the following way: An absorption mat is spread on a surface fouled by oil, whereby the fibres of the support structure of the absorption device bind oil between them. The oil is further absorbed effectively to the absorption material fibres, because the fibres are evenly distributed in the absorption device. Thus, oil is absorbed to each absorption material fibre to the amount the fibre in question can bind i.e. a maximum amount of oil can be absorbed in relation to the volume of the absorption device. The absorption material will not deliver the material having been absorbed back so the absorption device can be left in place or intermediately stored for later removal and disposal.
  • Oil between the fibres can also be removed from the absorption device e.g. by conveying the absorption device between press rolls. After oil removal, it can be immediately retuned back to absorption duties.
  • the absorption device according to the invention is thus especially well-suited to be utilised on oil-combatting vessels, when oil is collected from the surface of water to the vessel by means of absorption devices.
  • the absorption device according to the invention can be used e.g. as a type of a belt conveyor for transferring oil from water to the vessel. It is obvious that only a part of the oil in the absorption device can be removed by pressing it, because in the absorption material a part of the oil is chemically bound inside the absorption material and a part adhered on the surfaces of the particles of the absorption material.
  • Absorption devices manufactured by the method can be used also in filtering so-called grey waste waters.
  • the absorption device is then formed of a support structure manufactured of an advantageously biodegradable fibre in which absorption material is bound by suitable adhesives.
  • the binding adhesives are most suitably biodegradable.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

With the method according to the invention, an absorption device (14) including support material (8) and absorption material (12) is manufactured especially for preventing oil damages. In the invention, a support material net maintaining the cohesion of the absorption material is formed of the support material by means of heat treatment. The support material and the absorption material are mixed together in a specified ratio for a substantially homogeneous mixture. Of this mixture, a blanket is formed on a base which blanket is heated to a temperature in which the support material softens and adheres to the absorption material. When the support material cools down, it hardens and forms a support material net maintaining the cohesion of the mixture. Alternatively, the absorption device can be manufactured by first forming a net-like gauze (10) of the support material on which a layer of absorption material is proportioned. After this, the gauze is folded to a layer-like structure (13) and heated to a temperature in which the support material softens and adheres to the absorption material. When the support material cools down, it hardens forming a support material net. On the outer surface of the absorption device, it is possible to fasten a support gauze, if desired, which further improves the cohesion of the absorption device. The support material can include natural fibre material, textile fibres, polyester and/or polypropylene. The absorption material is advantageously fibrous or fine-grained natural material, such as peat or cellulose fibre.

Description

Method for manufacturing an absorption device and an absorption device
The invention relates to a method for manufacturing an absorption device including support material and absorption material and an absorption device to be implemented by the method. The absorption device according to the invention is especially suitable for absorbing oil and other oil-like chemicals.
Oil spill prevention ways are generally known in which absorption material is spread on surfaces fouled by oil. After absorption has taken place, the absorption material and oil absorbed in it are removed by suitable devices for further treatment. One has tried to facilitate the spreading and removing of absorption material by sealing the absorption material to bags or boxes of different shapes.
Documents FI752374, DE3305223, DE1815592, DE1815592 and GB1251380 presented absorption mats and booms used in preventing oil damages utilising peat as the absorption material. In these solutions, peat is placed in loose form to a bag manufactured of oil-permeating cloth or dense net. Finnish utility model application U920309 describes a cushion-like dryer which includes a bag-like outer layer manufactured of porous paper and an inner part of paper fibre.
A weakness of these solutions is that, when the bag is broken, the absorption material is able to break up from the bag, whereby the whole absorption device becomes unusable. The loose absorption material is also able to move inside the bag, because of which the absorption device has no regular, permanent external appearance. This impedes the transport and storing of the absorption device and complicates the removal of oil from the used absorption device. Because of the uneven distribution of the absorption material included by the bag, the absorbing capacity of the absorption device varies in different parts of the absorption device.
The object of the invention is to introduce a method for manufacturing an absorption device and an absorption device, by means of which it is possible to eliminate flaws and disadvantages related to known absorption devices.
The objects according to the invention will be achieved by a method and an absorption device which are characterised by what is presented in the independent claims. Some advantageous embodiments of the invention are described in the dependent claims.
With the method according to the invention, an absorption device including support material and absorption material is manufactured. The main role of the support material is to function as a cohesive material for the absorption device and the role of the absorption material is to absorb in itself liquid material, such as oil. The basic idea of the invention is that a three-dimensional support material net maintaining the cohesion of the absorption material is formed of the support material by means of the heat treatment of the support material.
In an advantageous embodiment of the method according to the invention, support material and absorption material are mixed in a specified ratio into a mixture of substantially uniform quality. Of this mixture, a blanket is formed on a base which blanket is heated to a temperature in which the support material softens and partially melts adhering to the absorption material. When the support material cools down, it hardens and forms a support material net maintaining the cohesion of the mixture. To the mixture of the support material and the absorption material, it is possible to add in connection with mixing adhesive by means of which the cohesion of the absorption device is further improved.
In a second advantageous embodiment of the method according to the invention, a net-like gauze is first formed of the support material on which a layer of absorption material is proportioned. After this, the gauze is folded to a layer-like structure and heated to a temperature in which the support material softens and partially melts adhering to the absorption material. When the support material cools down, it hardens forming a support material net maintaining the cohesion of the layer-like structure. Advantageously, said gauze is formed of support material in fibrous form by a carding technique. Successive gauzes can further be bound together by adhesive to be mixed to the absorption material and/or by needling. On the outer surface of the absorption device, it is possible to fasten a support gauze, if desired, which further improves the cohesion of the absorption device.
In an advantageous embodiment of the invention, the support material includes natural fibre material, textile fibres, polyester and/or polypropylene. The absorption material is advantageously fibrous or fine-grained natural material, such as peat or cellulose fibre. Advantageously, the absorption material and/or the support material are biodegradable materials.
An advantage of the absorption device according to the invention is that it is reliable in operation, because the breaking of a point of the surface layer will not affect the operation of the other part of the absorption device nor lead to the breaking of the whole absorption device. Furthermore, an advantage of the absorption device according to the invention is that it is an absorption device maintaining its cohesion and shape well, which facilitates the handling, transport and storing of the absorption device and separating oil from the absorption device.
A further advantage of the absorption device according to the invention is that it has a uniform absorbing capacity.
The invention will now be described in detail. The description refers to the accompanying drawings in which
Fig. 1 shows by way of an example the steps of a method according to the invention as a diagram.
Fig. 1 shows a simple diagram of the different steps of a method according to the invention. In the method according to the invention, a thin net-like gauze 10 is first manufactured of support material 8 in fibrous form by means of a carding technique. Carding means here a treatment method of fibrous material known as such in which the material is brought to a gauze-like form. Several different textile fibres suitable for the purpose can be utilised as the support material, such as different natural fibres, polyester, polypropylene or their mixtures. On the gauze, a thin layer of absorption material 12 in loose form is proportioned. Advantageously, the absorption material is peat, refined recycled pulp or some other fine-grained material similar to the above. Also a mixture of several materials can be used as the absorption material. The absorption material fills the holes of the net-like gauze and forms a thin layer on the gauze. Among the absorption material, it is possible, if desired, to add also adhesive which binds the absorption material particles to the gauze. Advantageously, the adhesive, the absorption material and the support material are biodegradable materials.
Of the gauze-like support material and the absorption material is formed a thicker structure by folding, whereby individual gauze parts are set on top of each other in layers. Thus is created a layer-like structure 13 in which there are on top of the other several support material gauzes and between them absorption material layers. Of the layer-like material is formed a mat-like absorption device 14 by binding the gauzes on top of each other and the absorption material layers between them together. On the outer surfaces of the layer-like structure, it is possible to arrange a support gauze, if required (not shown in the figure). Advantageously, the support gauze is of textile fibre, such as natural fibre, polyester, polypropylene or a mixture of the above. In the method according to the invention, the binding of gauzes on top of each other is done by means of heat treatment. In the heat treatment, the temperature of the layer-like structure is increased such that the gauze-like support material softens and partially melts. The temperature of the layer-like structure can be increased to a desired level e.g. by hot air blowers. Melted support material gauzes on top of each other are fastened to each other and form a three- dimensional net-like structure inside the absorption device which structure adheres to the surrounding absorption material. When e.g. polyester is used as the support material, a suitable temperature for the heat treatment is 150-1700C. In addition to heat treatment, it is possible to use adhesive binding and/or needling, in which gauzes on top of each other are needled to each other, as a complementary binding method.
After the heat treatment, the absorption device is let to cool back to the normal temperature. When the support material cools down, it hardens forming a three- dimensional support material net maintaining the cohesion of the absorption device, because of which the absorption device maintains its shape.
In an advantageous embodiment of the method according to the invention, the absorption device 14 including support material and absorption material is manufactured by a so-called formatting method in which the fibrous support material 8 and the fine-grained absorption material 12 are mixed to each other in a suitable ratio, whereby a substantially homogeneous mixture of support material and absorption material is obtained. It is also possible to add adhesive to the mixture, if required. Of this mixture, a blanket is shaped on a suitable base for which the above-described heat treatment is performed. In the heat treatment, the temperature of the blanket is increased so high that the support material fibres soften and partially melt. After the support material has cooled down, a support material net maintaining the cohesion of the mixture is produced to the blanket, whereby the blanket becomes the absorption device 14 as described above.
The absorption device according to the above-described method is used in the following way: An absorption mat is spread on a surface fouled by oil, whereby the fibres of the support structure of the absorption device bind oil between them. The oil is further absorbed effectively to the absorption material fibres, because the fibres are evenly distributed in the absorption device. Thus, oil is absorbed to each absorption material fibre to the amount the fibre in question can bind i.e. a maximum amount of oil can be absorbed in relation to the volume of the absorption device. The absorption material will not deliver the material having been absorbed back so the absorption device can be left in place or intermediately stored for later removal and disposal.
Oil between the fibres can also be removed from the absorption device e.g. by conveying the absorption device between press rolls. After oil removal, it can be immediately retuned back to absorption duties. The absorption device according to the invention is thus especially well-suited to be utilised on oil-combatting vessels, when oil is collected from the surface of water to the vessel by means of absorption devices. The absorption device according to the invention can be used e.g. as a type of a belt conveyor for transferring oil from water to the vessel. It is obvious that only a part of the oil in the absorption device can be removed by pressing it, because in the absorption material a part of the oil is chemically bound inside the absorption material and a part adhered on the surfaces of the particles of the absorption material.
Absorption devices manufactured by the method can be used also in filtering so- called grey waste waters. The absorption device is then formed of a support structure manufactured of an advantageously biodegradable fibre in which absorption material is bound by suitable adhesives. The binding adhesives are most suitably biodegradable.
Above were described advantageous embodiments of a method according to the invention. The invention is not limited to the above-described solutions, but it is possible to apply the inventive idea with several ways within the limitations set by the claims.

Claims

Claims
1. A method for manufacturing an absorption device (16) including support material (8) and absorption material (12), characterised in that a cohesive structure is formed of the support material (8) and the absorption material (12) by a support material net obtained by the heat treatment of the support material.
2. A method according to claim 1 , characterised in that
- support material (8) and absorption material (12)are mixed together in a specified ratio for a substantially homogeneous mixture,
- a blanket is shaped of said mixture on a base, - said blanket is heated to a temperature in which the support material softens, partially melts and adheres to the absorption material, and
- the mixture is cooled down, whereby the support material hardens forming a support material net maintaining the cohesion of the mixture.
3. A method according to claim 2, characterised in that to the mixture of support material (8) and absorption material (12) adhesive is added in connection with mixing.
4. A method according to claim 1 , characterised in that
- a net-like gauze (10) of the support material (8) is formed,
- a layer of the absorption material (12) is proportioned on the gauze (10), - the gauze (10) is folded to a layer-like structure (13),
- said layer-like structure (13) is heated to a temperature in which the support material (8) softens, partially melts and adheres to the absorption material, and
- the structure is cooled down, whereby the support material hardens forming a support material net maintaining the cohesion of the layer-like structure.
5. A method according to claim 4, characterised in that the gauze is formed of support material (8) in fibrous form by a carding technique.
6. A method according to claim 4 or 5, characterised in that successive gauzes (10) are bound together by adhesive to be mixed to the absorption material (12) and/or by needling.
7. A method according to any one of claims 1-6, characterised in that as the support material (8) natural fibre material, textile fibres, polyester and/or polypropylene is used.
8. A method according to any one of claims 1-7, characterised in that as the absorption material (12) fibrous or fine-grained natural material is used.
9. A method according to claim 8, characterised in that as the absorption material (12) peat or cellulose fibre is used.
10. A method according to any one of claims 1-9, characterised in that as the absorption material and/or support material biodegradable material is used.
11. An absorption device (14) including support material (8) and absorption material (12), characterised in that the support material (8) and the absorption material (12) are bound together to a cohesive structure by means of a support material net formed by heat treatment.
12. An absorption device (14) according to claim 11 , characterised in that the absorption material (12) includes peat and/or cellulose fibre.
13. An absorption device (14) according to claim 11 or 12, characterised in that the support material (8) includes natural fibre material, textile fibres, polyester and/or polypropylene.
14. An absorption device (14) according to any one of claims 11-13, characterised in that the support material (8) and/or the absorption material (12) are biodegradable materials.
15. An absorption device according to any one of claims 11-14, characterised in that on its outer surface there is a support gauze.
16. An absorption device according to any one of claims 11-15, characterised in that it is an oil absorption device.
PCT/FI2006/050529 2006-11-29 2006-11-29 Method for manufacturing an absorption device and an absorption device WO2008065233A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/FI2006/050529 WO2008065233A1 (en) 2006-11-29 2006-11-29 Method for manufacturing an absorption device and an absorption device
EP06820108A EP2097587A1 (en) 2006-11-29 2006-11-29 Method for manufacturing an absorption device and an absorption device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2006/050529 WO2008065233A1 (en) 2006-11-29 2006-11-29 Method for manufacturing an absorption device and an absorption device

Publications (1)

Publication Number Publication Date
WO2008065233A1 true WO2008065233A1 (en) 2008-06-05

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WO (1) WO2008065233A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018037165A1 (en) * 2016-08-26 2018-03-01 Vapo Oy Composite structure and a method for producing the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117890A2 (en) * 1983-01-29 1984-09-12 Johannes Heyen Device for removing in particular oil pollution from water surfaces
US5156743A (en) * 1991-03-21 1992-10-20 Muncrief Paul M Oil absorbent layered fabric sheet
JPH04371833A (en) * 1991-06-21 1992-12-24 Dainippon Printing Co Ltd Oil-absorbable sheet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117890A2 (en) * 1983-01-29 1984-09-12 Johannes Heyen Device for removing in particular oil pollution from water surfaces
US5156743A (en) * 1991-03-21 1992-10-20 Muncrief Paul M Oil absorbent layered fabric sheet
JPH04371833A (en) * 1991-06-21 1992-12-24 Dainippon Printing Co Ltd Oil-absorbable sheet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018037165A1 (en) * 2016-08-26 2018-03-01 Vapo Oy Composite structure and a method for producing the same

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Publication number Publication date
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