F - Mech Eng,Light,Heat,Weapons – 26 – B
Patent
F - Mech Eng,Light,Heat,Weapons
26
B
F26B 3/347 (2006.01) F26B 7/00 (2006.01) F26B 11/12 (2006.01)
Patent
CA 2650025
The present invention relates to a method and a device for drying sludge, characterized in that the sludge drying method comprises: a step of pressurizing a sealed chamber (1) to a defined pressure at least by injecting saturated steam and of maintaining this pressure for a defined time; a step of charging the inside of a tank, away from the walls of the chamber (1), with the sludge using charging means, while maintaining the pressure; a step of injecting superheated steam into the sludge (5) via a mixer (3) acting close to the wall of the tank furthest away from the microwave source, comprising injection means (33); a step of heating the core of the sludge (5) by microwave emission in frequencies between 400 and 2450 MHz towards the tank, this step being carried out while mixing the sludge (5); and a step of removing the water collected by condensation from the walls of the chamber and by said water trickling down the walls towards the bottom of the chamber (1) via a valve (6) communicating with the outside.
Le procédé de séchage des boues comporte :une étape de mise en pression à une pression déterminée d'une enceinte (1) étanche au moins par injection de vapeur d'eau saturante; une étape de chargement des boues à l'intérieur d'une cuve (7) éloignée des parois de l'enceinte (1); une étape d'injection de vapeur surchauffée dans la boue (5) par l'intermédiaire d'un mélangeur (3) en action proche de la paroi de la cuve (7) la plus éloignée par rapport à la source des micro-ondes (22) comportant des moyens (33) d'injections; une étape de chauffage au coeur de la boue (5) par émission de micro-ondes (23) en direction de la cuve (7), cette étape étant réalisée en mélangeant la boue (5); une étape d'évacuation des eaux recueillies par condensation et ruissellement sur les parois de l'enceinte vers le fond de l'enceinte (1).
Barbosa Arthur
Bearn Innovation - Dedieu Bernard
Gowling Lafleur Henderson Llp
Sarl Innoparts
LandOfFree
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