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US 2022/0348494 A1Published application
Method for recycling water resulting from a method for producing a mat of mineral fibres
AssigneeSaint-Gobain Isover
InventorsAntoine ROBERT, Leslie GENIEYS
Life of this patent
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Abstract
The invention relates to the field of materials based on mineral fibers, in particular mineral wool such as glass wool or rock wool. More specifically, the present invention relates to a method and a device for recycling the water recovered in a fiberizing and shaping method when using a specific acid binder based on monomeric polycarboxylic acid, or a salt of such an acid.
Claims15
A method for reducing the corrosion of equipment in a method for producing a mineral fiber mat, said production method comprising:
- fiberizing fibers and then bonding them with the aid of an aqueous binder in a forming zone;
- cross-linking the binder in an oven;
- and
- washing the equipment in the forming zone with wash water that is continuously recycled in a first recycling loop, said method comprising adjusting the pH of the wash water to a value between 6 and 9 before the wash water is recycled to said forming zone along said first recycling loop,
- the production method further comprising washing fumes from the oven and recycling the fumes wash water,
- wherein the aqueous binder comprises at least one sugar selected from hydrogenated sugars, reducing sugars, and non-reducing sugars, and at least one monomeric polycarboxylic acid or salt thereof, and
- wherein the fumes wash water is recycled in a second recycling loop, separate from the first, a portion of this recycled fumes wash water being transferred at intervals to a zone for preparing said binder, without adjusting its pH.
4 more elements
A facility for the production of a fiber mat, comprising:
- a forming unit comprising means for spraying a solution of a binder onto neoformed fibers, supplied by a station for preparing the binder solution, and first washing means for washing the forming unit,
- means for receiving and conveying the fibers impregnated with the binder to an oven provided with one or more flues,
- suction means for sucking off the excess binder contained in the fiber mat received on the conveying means, and first collection means for collecting the wash water from the forming unit, the suction and collection means being in fluid communication with a first tank connected to base supply means, said first tank being in fluid communication with said washing means of the forming unit to form a first recycling circuit,
- second washing means for washing the fumes coming from the oven flue(s), and second collection means for collecting the wash water from those fumes,
- wherein the second collection means comprises a second tank, separate from the first tank, and in fluid communication with the second washing means to form a second recycling circuit,
- and in that said second tank is in fluid communication with the binder solution preparation station.
3 more elements
Dependencies are inferred from the claim text.