WO2021058634A1 - Methode de recyclage des eaux issues d'un procede de fabrication d'un matelas de fibres minerales - Google Patents
Methode de recyclage des eaux issues d'un procede de fabrication d'un matelas de fibres minerales Download PDFInfo
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- WO2021058634A1 WO2021058634A1 PCT/EP2020/076681 EP2020076681W WO2021058634A1 WO 2021058634 A1 WO2021058634 A1 WO 2021058634A1 EP 2020076681 W EP2020076681 W EP 2020076681W WO 2021058634 A1 WO2021058634 A1 WO 2021058634A1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/321—Starch; Starch derivatives
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/004—Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
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- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/002—Thermal treatment
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
- C03C25/14—Spraying
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
- C03C25/14—Spraying
- C03C25/146—Spraying onto fibres in suspension in a gaseous medium
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
- C03C25/16—Dipping
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/70—Cleaning, e.g. for reuse
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
- D04H1/4218—Glass fibres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
- D04H1/4218—Glass fibres
- D04H1/4226—Glass fibres characterised by the apparatus for manufacturing the glass fleece
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/11—Deposition methods from solutions or suspensions
- C03C2218/111—Deposition methods from solutions or suspensions by dipping, immersion
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/32—After-treatment
Definitions
- the invention relates to the field of materials based on mineral fibers, in particular mineral wool of the glass or rock wool type. More particularly, the present invention relates to a method and to a device for recycling the water recovered in a fiberizing and shaping process, when a particular acid binder, based on monomeric polycarboxylic acid, is used.
- the majority of materials such as insulation panels or rolls on the market today consist of a mineral wool mat or felt comprising mineral fibers, such as glass fibers bound by an organic binder.
- the formation of the mineral fiber mat comprises a fiberizing process by centrifugation, embodiments of which are described in applications EP 0406 107 or EP 0461 995.
- this firing is carried out under conditions making it possible to ensure both the final mechanical strength of the mattress obtained, as well as its flexibility, that is to say its ability to substantially regain its initial shape and thickness, after a step of strong compression in particular necessary for its packaging and its transport.
- the main problem with the use of this type of binders lies in the acidity of the binder solution sprayed on the fibers in the fiberizing chamber.
- a pH of the solution generally less than 4, or even more often less than 3 or even 2.5 is necessary for the final production of a mattress having good properties of use.
- the result is that the water resulting from the process, in particular that recovered at the level of the conveyor belt for the fibers after forming, has a very marked acidity.
- thermoset polyesters obtained by reaction of sugars with polycarboxylic monomeric acids, in particular citric acid, and are described in particular in patent applications WO 2013/014399 and WO 2013/021112.
- the Applicant has in fact observed that the citric acid used as a reagent in the manufacture of these "green” binders tended to decompose in the oven, the temperature of which is generally raised to more than 180 ° C. or even. over 200 ° C.
- the decomposition products formed in particular citraconic acid, itaconic acid, propionic acid, acetic acid and formic acid, then evaporate via the stacks of the oven.
- the fumes from the oven also contain undecomposed citric acid (see PCT / FR2019 / 050879 not yet published at the time of publication. filing of the present application) and are therefore very acidic.
- the mixture of the washing water for the oven fumes and the process can thus reach a pH of 4.
- this washing water should therefore be neutralized at using a large amount of base before it can be recycled to the forming zone, in particular following the teaching of WO 2009/007648.
- part of the recycled water is also directed to the station for preparing the binder solution.
- base affects the hardening of the binder and therefore its ability to bind the mineral fibers together, as well as the mechanical properties of the fiber mat.
- One solution to overcome this problem consists in reacidifying the fraction of the washing water intended for the manufacture of the binder. Another solution proposed in document US Pat. No.
- 7,754,020 consists in separately recycling the washing water from the walls of the forming hood to the binder preparation station, without neutralizing them.
- the sized fibers which adhere to the walls of the hood indeed contain reagents which can advantageously be reused in the manufacture of the binder.
- the Applicant has now developed a method making it possible to reduce the corrosion of equipment in a process for producing a mattress of mineral fibers obtained by using a binder based on polycarboxylic monomeric acid, such as citric acid.
- This method essentially consists in recycling the water for washing the fumes from the oven in a recycling loop separate from that used for washing other equipment, in particular the forming chamber.
- the subject of the invention is thus a method for reducing the corrosion of equipment in a process for producing a mat of mineral fibers, said process comprising a step of fiberizing and then binding the fibers using an aqueous binder, in a forming zone, a step of crosslinking the binder in an oven, and washing of the equipment of the forming zone by means of washing water continuously recycled in a first recycling loop, said method comprising the adjustment of the pH of the washing water, at a value between 6 and 9, before the washing water is recycled to said forming zone, according to said first recycling loop, the process further comprising the washing of fumes from the oven and recycling of the fume washing water, said method being characterized in that the aqueous binder comprises at least one sugar chosen from hydrogenated sugars, reducing sugars and non-reducing sugars and at least one m acid polycarboxylic onomeric or a salt of such an acid, in that the flue gas washing water is recycled in a second recycling loop, separate from the first, a part of this recycled fum
- the subject of the invention is also an installation for the production of a fiber mat comprising:
- a forming unit comprising means for spraying a solution of a binder on neoformed fibers, supplied by a station for preparing the binder solution, as well as the first means for washing the forming unit,
- the suction and collection means being in fluid communication with a first reservoir connected to base supply means, said first reservoir being in fluid communication with said forming unit washing means to form a first recycling circuit
- the second collecting means comprise a second tank, distinct from the first reservoir, and in fluid communication with the second washing means to form a second recycling circuit, and in that said second reservoir is in fluid communication with the station for preparing the binder solution.
- FIG 1 represents a diagram of an installation used for the implementation of the method according to the invention.
- the invention relates to a method for reducing corrosion of equipment in a process for producing a mineral fiber mat.
- This method conventionally comprises a step of fiberizing and then binding the fibers using an aqueous binder, in a forming zone, followed by a step of crosslinking the binder in an oven fitted with one or more chimneys, the more often two chimneys, through which escape the hot gases from the oven.
- the equipment of the forming zone is washed by means of washing water which is continuously recycled in a first recycling loop.
- the water from the forming process is recovered at least in part at the outlet of the forming zone, in particular at the level of the conveyor belt for the fibers.
- the recovered water is at least partly used for washing at least one of the constituent elements of the device for obtaining the fiber mat, in particular the walls of the forming chamber or hood, the means for conveying the fibers. and / or the suction means used to eliminate the excess binder in the fibrous mat. It is thus possible to recover in particular the reagents used for the formation of the binder and which have not reacted, as well as the unbound mineral fibers.
- a portion of the water recycled in the first loop is advantageously filtered through filters of approximately 50 ⁇ m and used for the dilution of the binder composition immediately before spraying the diluted composition on the mineral fibers, by means of a spray crown. .
- the washing water circulating in this first recycling loop is not used for washing the fumes from the oven.
- the method according to the invention comprises adjusting the pH of the washing water, to a value between 6 and 9, before the washing water is recycled to said forming zone, following said first recycling loop.
- a base can be added to the recycled water by any means and in particular manually, automatically or semi-automatically.
- the base can thus be added automatically in the form of an aqueous solution in the first recycling loop, using a metering pump, as a function of the pH measured by one or more pH probes placed in the first recycling loop.
- the base flow rate can be adjusted directly as a function of the flow rate of acid binder introduced during the forming process, in particular according to a proportionality relationship.
- the pH value is adjusted by means of a base chosen from alkaline bases of the alkali metal or alkaline earth metal hydroxide or carbonate type.
- a relatively weak base such as lime, ammonia or potassium hydroxide can be used to achieve a pH of 6 to 7, while it is preferred to use a stronger base, such as sodium hydroxide, to achieve a pH of 7 to 9.
- the method according to the invention further comprises washing the fumes from the oven and recycling this fume washing water according to a second recycling loop, separate from the first. A portion of this recycled fume washing water is transferred from time to time to a zone for preparing said binder, without adjusting its pH. To compensate for the resulting volume loss of washing solution, a quantity of water equivalent to the quantity of washing water transferred to the preparation zone of said binder is introduced punctually into the flue gas washing water.
- the recycled fume washing water is filtered before being used for the preparation of the binder.
- the method according to the invention is preferably implemented in the context of a process for producing a mat of mineral fibers using a particular binder.
- the binder used specifically comprises at least one sugar chosen from hydrogenated sugars, reducing sugars and non-reducing sugars and at least one monomeric polycarboxylic acid or a salt of such an acid.
- the polycarboxylic acid used according to the invention is of the monomeric type. In other words, it does not include polymers obtained by polymerizing monomeric carboxylic acids, such as homopolymers or copolymers of acrylic acid or methacrylic acid. It can be a dicarboxylic, tricarboxylic or tetracarboxylic acid.
- Dicarboxylic acids include, for example, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, malic acid, tartaric acid, tartronic acid, aspartic acid, glutamic acid, fumaric acid, itaconic acid, maleic acid, traumatic acid, camphoric acid, phthalic acid and its derivatives, in particular containing at least one boron or chlorine atom, tetrahydrophthalic acid and its derivatives, in particular containing at least one chlorine atom such as chlorendic acid, isophthalic acid , terephthalic acid, mesaconic acid and citraconic acid.
- oxalic acid malonic acid
- succinic acid glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, malic acid, tartaric acid, tartronic acid, as
- Tricarboxylic acids include, for example, citric acid, tricarballylic acid, 1,2,4-butanetricarboxylic acid, aconitic acid, hemimellitic acid, trimellitic acid and trimesic acid.
- tetracarboxylic acid mention may be made of 1,2,3,4-butanetetracarboxylic acid and pyromellitic acid.
- Citric acid is preferably used.
- Polycarboxylic acid can be partially or completely neutralized with a base, for example an amine or ammonia.
- a base for example an amine or ammonia.
- the polycarboxylic acid is used in the acid form, that is to say not neutralized with a base.
- the polycarboxylic acid is reacted with at least one sugar.
- a first type of sugars which can be used according to the invention consists of reducing sugars.
- the reducing sugar can be chosen from: monosaccharides such as glucose, galactose, mannose, fructose and their mixtures, and disaccharides, such as lactose, maltose, isomaltose, cellobiose and their mixtures.
- Glucose or fructose is preferably used, more preferably glucose.
- hydrophilic sugars The hydrogenation products of these carbohydrates in which the aldehyde or ketone group has been reduced to alcohol constitute a second type of sugars which can be used according to the invention, referred to as "hydrogenated sugars".
- These hydrogenation products are also called alditols or sugar alcohols. They can be obtained by catalytic hydrogenation according to known methods, under conditions of high hydrogen pressure and temperature, in the presence of a catalyst chosen from the elements of groups IB, IIB, IVB, VI, VII and VIII of table periodic elements, preferably from the group comprising nickel, platinum, palladium, cobalt, molybdenum and mixtures thereof.
- the preferred catalyst is Raney nickel.
- the hydrogenated sugar is for example chosen from: erythritol, arabitol, xylitol, sorbitol, mannitol, iditol, maltitol, isomaltitol, lactitol, cellobitol, palatinitol, maltotriol, hydrogenation products of starch hydrolysates or lignocellulosic materials, and mixtures thereof.
- Starch hydrolysates are products obtained by enzymatic and / or acid hydrolysis of starch.
- the degree of hydrolysis is generally characterized by the dextrose equivalent (DE), defined by the following relationship:
- Preferred starch hydrolysates have, before the hydrogenation step, a DE of between 5 and 99, and preferably between 10 and 80.
- the hydrogenated sugars can be advantageous in the case where it is desired to obtain a mattress of mineral fibers of light color, which is hardly possible in the case of reducing sugars which tend to be colored under the effect of the Maillard reaction. .
- the Hydrogenated sugars also exhibit higher thermal stability than reducing sugars.
- the invention also relates to binders based on non-reducing sugars, consisting of several carbohydrate units of which the carbons carrying the hemi-acetal hydroxyl are involved in the osidic bonds connecting the units together.
- non-reducing sugars mention may be made of: disaccharides such as trehalose, isotrehaloses, sucrose, isosaccharoses and their mixtures, or triholosides such as melezitose, gentioanose, raffmose, erlose and fumbelliferose or else tetraholosides such as stachyose, or pentaholosides such as verbascose.
- Sucrose is preferred for use in the present invention.
- binder composition designates here aqueous solutions more or less concentrated in solids, which are sufficiently fluid to be able to be pumped, and which have a suitable viscosity to allow their spraying by means of nozzles on newly formed fibers, optionally after dilution in water.
- the binder composition generally contains 30 to 70% by weight, preferably 40 to 60% by weight, of polycarboxylic acid, based on the amount of solids in the binder composition.
- the respective proportions of sugar and polycarboxylic acid are chosen so as to result in binders which, in the crosslinked state, give the final mineral wool product the best mechanical properties, especially after accelerated aging under humid conditions. They thus generally correspond to a sugar / polycarboxylic acid weight ratio of between 25/75 and 75/25, preferably between 40/60 and 60/40.
- the binder composition may further comprise a catalyst which may be chosen from bases and Lewis acids, such as clays, colloidal or non-colloidal silica, organic amines, quaternary ammoniums, metal oxides, metal sulphates, metal chlorides, urea sulphates, urea chlorides and silicate catalysts.
- a catalyst which may be chosen from bases and Lewis acids, such as clays, colloidal or non-colloidal silica, organic amines, quaternary ammoniums, metal oxides, metal sulphates, metal chlorides, urea sulphates, urea chlorides and silicate catalysts.
- the catalyst can also be a phosphorus-containing compound, for example an alkali metal hypophosphite, an alkali metal phosphite, a alkali metal polyphosphate, alkali metal hydrogenphosphate, phosphoric acid or alkylphosphonic acid.
- the alkali metal is sodium or potassium.
- the catalyst can also be a compound containing fluorine and boron, for example tetrafluoroboric acid or a salt of this acid, in particular an alkali metal tetrafluoroborate such as sodium or potassium, an alkaline earth metal tetrafluoroborate such as calcium or magnesium, zinc tetrafluoroborate and ammonium tetrafluoroborate.
- tetrafluoroboric acid or a salt of this acid in particular an alkali metal tetrafluoroborate such as sodium or potassium, an alkaline earth metal tetrafluoroborate such as calcium or magnesium, zinc tetrafluoroborate and ammonium tetrafluoroborate.
- the catalyst is sodium hypophosphite, sodium phosphite or a mixture of these compounds.
- the amount of catalyst introduced into the binder composition generally represents at most 20% by weight, advantageously from 1 to 10% by weight, relative to the total weight of the sugar (s) and polycarboxylic acid (s).
- the binder composition used according to the invention can also comprise conventional additives, such as urea, a reactive silicone and / or fillers.
- pH is generally between 2.0 and 9.0, preferably between 2.2 and 7.0 and in particular between 2.5 and 5.0.
- the mineral fibers to which the binder composition is applied may consist in particular of glass or rock fibers, preferably glass fibers. These fibers are formed by extrusion by centrifugation and then the binder composition is sprayed onto them. The sized fibers are then collected in the form of a web of fibers which is partially dehydrated during its transport to an oven where the fibers coated with binder are heated to at least 140 ° C, generally at least 200 ° C, by example between 250 and 280 ° C, in order to crosslink the binder.
- the invention further relates to an installation for implementing the method described above.
- the diagram of the attached figure is a schematic view of an installation according to the invention, comprising two separate recycling circuits.
- this installation comprises a forming unit 1 which comprises a fiber drawing chamber (not shown) conventionally used for fiberizing glass wool, for example, in which the fiber drawing process can be implemented by internal centrifugation developed by the Applicant, embodiments of which are described in applications EP 0 406 107 or EP 0 461 995.
- the fiber drawing chamber itself is perfectly known and generally comprises a hood surmounted by one or more centrifuges, each of which comprises a basket for reception. molten glass and a plate-shaped piece whose peripheral wall is provided with a large number of orifices.
- the molten glass brought in a stream from a melting furnace and first recovered in the basket of the centrifuge, escapes through the holes in the plate in the form of a multitude of filaments driven in rotation.
- the centrifuge is also surrounded by an annular burner which creates at the periphery of the wall of the centrifuge a gas stream at high speed and at a temperature high enough to stretch the glass filaments into fibers.
- the forming unit also comprises a forming hood in which a binder composition is sprayed onto the fibers subjected to a current of hot air by means of a spraying device 2 supplied by the binder preparation station 3.
- the bottom of the forming hood comprises means 6 for collecting the washing water from the hood, as well as a device for receiving the fibers comprising a conveyor 4 comprising an endless belt permeable to fluids, under which are arranged boxes d. suction 5 of the fluids contained in the neoformed mattress, resulting from the forming process described above.
- the suction boxes are for example connected to a fan (not shown) making it possible to keep them in depression.
- Fluids are gases such as air and fumes as well as an excess aqueous phase containing excess binder as well as fines and fibers.
- a mat of glass wool fibers mixed intimately with the binder is formed on the conveyor belt.
- the mattress is led by the conveyor to an oven 7 which is usually constituted by a closed chamber comprising a series of boxes or compartments supplied by hot air burners circulated by fans.
- the oven 7 is for example crossed by two complementary transport and calibration conveyors.
- the conveyors compress the mattress to give it the desired thickness.
- this is typically between 10 and 150 mm, the density of the glass wool layer being for example between 10 and 100 kg / m 3 .
- the cooking in the oven induces the evaporation of the residual water in the form of fumes which are recovered and treated at the outlet of the oven 7, as well as the crosslinking of the binder between the fibers of the mattress.
- the fiber mat can then be subjected to other well known operations such as edge cutting, longitudinal and / or transverse cutting, surfacing etc., within various devices of known technology.
- the installation according to the invention is characterized by the presence of two distinct recycling circuits, which will now be described.
- the fluids (including water and excess binder reagents) and fines coming from the forming chamber and present in particular on the conveyor 4 are typically extracted by means of the collection means 6 and the boxes of suction 5 described above, before being sent to a well 8 from which they are pumped before being stored in a first tank 10, after passing through a filtration system 9 provided with filters of about 500 ⁇ m in order to eliminate fibers.
- This first tank is equipped with a pH probe 11 which is connected to a processor (not shown) which analyzes the pH value recorded and controls a neutralization system consisting of a pump 12 allowing the introduction of a solution of neutralization stored in a tank 13.
- the neutralization solution consists for example of an aqueous solution of sodium hydroxide or ammonia at 30% which feeds the tank 10 as soon as the pH value drops below 7.5 ⁇ 0 , 3.
- the processor stops the pump 12.
- the washing water stored in the first tank 10 is transferred to the forming unit 1, thus forming a first recycling circuit 100.
- the quantity of washing water in the first recycling circuit 100 can be about 100 m 3 .
- the fumes from the oven 7 are washed, at the level of the chimneys of the oven, using an aqueous solution stored in a second tank 14 and sprayed into the chimneys by means of venturis (not shown ).
- the flue gas washing water is collected at the base of a vortex (not shown) and returned to the same tank 14, thus forming a second recycling circuit 200, the total volume of which may be around 5 m 3 .
- part of the washing water for the fumes from the oven is taken from the second tank 14 and transferred, by means of the pump 15 and after passing through a filtration system 16, equipped with filters of approximately 50 ⁇ m, to the station for preparing the binder solution 3 which supplies the spraying means 2 within the forming unit 1.
- the second tank 14 is then supplied with city water via the pipe 17 in order to compensate for the resulting volume loss .
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Textile Engineering (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Thermal Sciences (AREA)
- Nonwoven Fabrics (AREA)
- Paper (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2020356324A AU2020356324A1 (en) | 2019-09-26 | 2020-09-24 | Method for recycling water resulting from a method for producing a mat of mineral fibres |
US17/763,809 US20220348494A1 (en) | 2019-09-26 | 2020-09-24 | Method for recycling water resulting from a method for producing a mat of mineral fibres |
KR1020227009666A KR20220070446A (ko) | 2019-09-26 | 2020-09-24 | 미네랄 섬유들의 매트의 생성 방법에 기인한 물의 재순환 방법 |
BR112022004543A BR112022004543A2 (pt) | 2019-09-26 | 2020-09-24 | Método de reciclagem das águas provenientes de um processo de fabricação de uma esteira de fibras minerais |
CA3151245A CA3151245A1 (fr) | 2019-09-26 | 2020-09-24 | Methode de recyclage des eaux issues d'un procede de fabrication d'un matelas de fibres minerales |
MX2022003692A MX2022003692A (es) | 2019-09-26 | 2020-09-24 | Metodo para reciclar agua resultante de un metodo para producir una estera de fibras minerales. |
EP20775011.8A EP4034511A1 (fr) | 2019-09-26 | 2020-09-24 | Méthode de recyclage des eaux issues d'un procédé de fabrication d'un matelas de fibres minérales |
JP2022519408A JP2022550533A (ja) | 2019-09-26 | 2020-09-24 | ミネラル繊維のマットを製造するプロセスから生じる水を再循環する方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FRFR1910642 | 2019-09-26 | ||
FR1910642A FR3101343B1 (fr) | 2019-09-26 | 2019-09-26 | Methode de recyclage des eaux issues d’un procede de fabrication d’un matelas de fibres minerales |
Publications (1)
Publication Number | Publication Date |
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WO2021058634A1 true WO2021058634A1 (fr) | 2021-04-01 |
Family
ID=69024391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2020/076681 WO2021058634A1 (fr) | 2019-09-26 | 2020-09-24 | Methode de recyclage des eaux issues d'un procede de fabrication d'un matelas de fibres minerales |
Country Status (10)
Country | Link |
---|---|
US (1) | US20220348494A1 (fr) |
EP (1) | EP4034511A1 (fr) |
JP (1) | JP2022550533A (fr) |
KR (1) | KR20220070446A (fr) |
AU (1) | AU2020356324A1 (fr) |
BR (1) | BR112022004543A2 (fr) |
CA (1) | CA3151245A1 (fr) |
FR (1) | FR3101343B1 (fr) |
MX (1) | MX2022003692A (fr) |
WO (1) | WO2021058634A1 (fr) |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3356565A (en) * | 1964-08-13 | 1967-12-05 | Owens Corning Fiberglass Corp | Waste wash water and waste binder reuse system and apparatus for mineral fiber forming process |
EP0406107A1 (fr) | 1989-06-29 | 1991-01-02 | Isover Saint-Gobain | Procédé et dispositif de réception de fibres minérales |
EP0461995A1 (fr) | 1990-06-12 | 1991-12-18 | Isover Saint-Gobain | Recyclage de produits fibreux dans une ligne de production de matelas à partir de fibres |
US20030221457A1 (en) * | 2002-05-31 | 2003-12-04 | Cline Harry B. | Washwater neutralization system for glass forming line |
EP1509638A1 (fr) * | 2002-05-31 | 2005-03-02 | Owens Corning | Systeme de neutralisation de l'eau de lavage d'une chaine de production de verre |
US7153437B2 (en) | 2004-06-25 | 2006-12-26 | Johns Manville | Controlling corrosion in process water systems |
WO2007014236A2 (fr) | 2005-07-26 | 2007-02-01 | Knauf Insulation Gmbh | Liants et substances conçues au moyen de ceux-ci |
WO2008127936A2 (fr) | 2007-04-13 | 2008-10-23 | Knauf Insulation Gmbh | Liants de maillard-résole composites |
WO2009007648A2 (fr) | 2007-07-04 | 2009-01-15 | Saint-Gobain Isover | Procede de recyclage des eaux issues d'un procede de fabrication d'un matelas isolant de fibres minerales |
WO2009019232A1 (fr) | 2007-08-03 | 2009-02-12 | Knauf Insulation Limited | Isolation a base de laine minerale |
WO2013014399A1 (fr) | 2011-07-27 | 2013-01-31 | Saint-Gobain Isover | Composition d'encollage pour laine minerale a base de maltitol et produits isolants obtenus |
WO2013021112A1 (fr) | 2011-08-05 | 2013-02-14 | Saint-Gobain Isover | Composition d'encollage pour laine minerale a base de saccharide reducteur et de saccharide hydrogene, et produits isolants obtenus. |
EP3127956A1 (fr) * | 2014-03-31 | 2017-02-08 | Kcc Corporation | Composition aqueuse de liant et procédé pour lier de la matière fibreuse l'utilisant |
-
2019
- 2019-09-26 FR FR1910642A patent/FR3101343B1/fr active Active
-
2020
- 2020-09-24 JP JP2022519408A patent/JP2022550533A/ja active Pending
- 2020-09-24 WO PCT/EP2020/076681 patent/WO2021058634A1/fr unknown
- 2020-09-24 MX MX2022003692A patent/MX2022003692A/es unknown
- 2020-09-24 US US17/763,809 patent/US20220348494A1/en active Pending
- 2020-09-24 EP EP20775011.8A patent/EP4034511A1/fr active Pending
- 2020-09-24 AU AU2020356324A patent/AU2020356324A1/en active Pending
- 2020-09-24 BR BR112022004543A patent/BR112022004543A2/pt unknown
- 2020-09-24 CA CA3151245A patent/CA3151245A1/fr active Pending
- 2020-09-24 KR KR1020227009666A patent/KR20220070446A/ko unknown
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3356565A (en) * | 1964-08-13 | 1967-12-05 | Owens Corning Fiberglass Corp | Waste wash water and waste binder reuse system and apparatus for mineral fiber forming process |
EP0406107A1 (fr) | 1989-06-29 | 1991-01-02 | Isover Saint-Gobain | Procédé et dispositif de réception de fibres minérales |
EP0461995A1 (fr) | 1990-06-12 | 1991-12-18 | Isover Saint-Gobain | Recyclage de produits fibreux dans une ligne de production de matelas à partir de fibres |
US7754020B2 (en) | 2002-05-31 | 2010-07-13 | Owens Corning Intellectual Capital, Llc. | Process water reuse system for low pH binders |
US20030221457A1 (en) * | 2002-05-31 | 2003-12-04 | Cline Harry B. | Washwater neutralization system for glass forming line |
EP1509638A1 (fr) * | 2002-05-31 | 2005-03-02 | Owens Corning | Systeme de neutralisation de l'eau de lavage d'une chaine de production de verre |
US7153437B2 (en) | 2004-06-25 | 2006-12-26 | Johns Manville | Controlling corrosion in process water systems |
WO2007014236A2 (fr) | 2005-07-26 | 2007-02-01 | Knauf Insulation Gmbh | Liants et substances conçues au moyen de ceux-ci |
WO2008127936A2 (fr) | 2007-04-13 | 2008-10-23 | Knauf Insulation Gmbh | Liants de maillard-résole composites |
WO2009007648A2 (fr) | 2007-07-04 | 2009-01-15 | Saint-Gobain Isover | Procede de recyclage des eaux issues d'un procede de fabrication d'un matelas isolant de fibres minerales |
WO2009019232A1 (fr) | 2007-08-03 | 2009-02-12 | Knauf Insulation Limited | Isolation a base de laine minerale |
WO2013014399A1 (fr) | 2011-07-27 | 2013-01-31 | Saint-Gobain Isover | Composition d'encollage pour laine minerale a base de maltitol et produits isolants obtenus |
WO2013021112A1 (fr) | 2011-08-05 | 2013-02-14 | Saint-Gobain Isover | Composition d'encollage pour laine minerale a base de saccharide reducteur et de saccharide hydrogene, et produits isolants obtenus. |
EP3127956A1 (fr) * | 2014-03-31 | 2017-02-08 | Kcc Corporation | Composition aqueuse de liant et procédé pour lier de la matière fibreuse l'utilisant |
Also Published As
Publication number | Publication date |
---|---|
AU2020356324A1 (en) | 2022-03-24 |
FR3101343A1 (fr) | 2021-04-02 |
CA3151245A1 (fr) | 2021-04-01 |
FR3101343B1 (fr) | 2021-10-22 |
KR20220070446A (ko) | 2022-05-31 |
US20220348494A1 (en) | 2022-11-03 |
JP2022550533A (ja) | 2022-12-02 |
BR112022004543A2 (pt) | 2022-05-31 |
EP4034511A1 (fr) | 2022-08-03 |
MX2022003692A (es) | 2022-04-26 |
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