USING RECYCLED WASTE WATER TO MAKE NONWOVEN FIBROUS MATERIALS SUITABLE FOR USE IN A POLLUTION CONTROL DEVICE OR IN A FIRESTOP

• Main Authors: MERRY, RICHARD P, HOWORTH, GARY F, HARDING, IAN R. I
• Format: Patent
• Language: English; Polish
• Published: 28.02.2019
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; IMPREGNATING OR COATING OF PAPER; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PIPES; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; STEAM ENGINES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; TEXTILES; THERMAL INSULATION IN GENERAL; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; WEAPONS

A nonwoven fibrous material suitable for use in a pollution control device or as a firestop and made according to a method comprising: providing a first slurry comprising water, first inorganic fibers, a first organic binder, and a first neutral pH flocculent; removing first waste water from the first slurry; optionally forming a first nonwoven fibrous material from the first slurry; providing a second slurry comprising a quantity of the first waste water, an optional quantity of relatively clean water, second inorganic fibers, a second organic binder, and a second flocculent that is the same and/or a different flocculent than that used in the first slurry; and forming a second nonwoven fibrous material from the second slurry, wherein the second nonwoven fibrous material is suitable for use in a pollution control device or as a firestop. The addition of the first waste water in the second slurry does not adversely affect the flocculation of the second organic binder in the second slurry.