Method for dewatering water-containing combustible solid

C - Chemistry – Metallurgy – 02 – F

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C02F 11/18 (2006.01) C02F 11/12 (2006.01) C10L 5/40 (2006.01)

Patent

CA 2580806

A method for dewatering a water-containing combustible solid excluding coal, comprising heating, in a sealed vessel, the water-containing combustible solid at a temperature of 100°C to 300°C under a pressure not less than a saturated steam pressure at said heating temperature, while applying a shearing force of 0.01 MPa to 20 MPa to said water-containing combustible solid. The method allows the production of a slurry in water which contains the water separated from the water-containing combustible solid and a combustible solid from which the water is removed, has a suitable viscosity and water content, and can be subjected to spray combustion, at low costs.

L'invention concerne un procédé servant à séparer l'eau d'un solide combustible contenant de l'eau, lequel comprend de chauffer dans une cuve hermétiquement fermée un solide combustible contenant de l'eau (à l'exception du charbon) à une température de 100 à 300°C sous une pression supérieure ou égale à la pression de vapeur d'eau saturante à la température de chauffage et d'appliquer simultanément un force de cisaillement de 0,01 à 20 MPa au solide combustible contenant de l'eau. Le procédé ci-dessus permet la production à faible coût d'un mélange (suspension épaisse dans de l'eau) qui contient l'eau séparée du solide combustible contenant de l'eau et un solide combustible dont on a enlevé l'eau, qui a une viscosité et une teneur en eau appropriées et qui peut être soumis à une combustion par pulvérisation.

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