F - Mech Eng,Light,Heat,Weapons – 26 – B
Patent
F - Mech Eng,Light,Heat,Weapons
26
B
F26B 3/20 (2006.01) F23G 5/04 (2006.01)
Patent
CA 2541149
The invention relates to a method and device for the thermal oxidation of organic sludge produced by polluted-water-treatment plants. The inventive method consists in: stirring an organic sludge having a dryness of between 12 and 18 % with steel balls having a temperature of between 145 ·C and 165 ·C, such as to produce a mixture of dry combustible particles and balls; and subjecting the mixture thus produced to a hot air stream having a temperature of between 350 ·C and 395 ·C, thereby causing the thermal oxidation of the dry particles. The method and device can be used to produce very compact units in order to satisfy sludge disposal requirements. The invention is particularly suitable for the in situ thermal oxidation of organic sludge produced by small and medium treatment plants.
L'invention concerne un procédé et son dispositif pour effectuer l'oxydation thermique des boues organiques produites par les stations d'épuration des eaux polluées. Procédé par lequel on brasse une boue organique dont la siccité est comprise entre 12 et 1.8 %, avec des billes d'acier dont la température est comprise entre 145 ~C et 165 ~C afin d'obtenir un mélange de billes et de particules sèches combustibles, on soumet le mélange obtenu à un flux d'air chaud dont la température est comprise entre 350 ~C et 395 ~C, ce qui provoque l'oxydation thermique des particules sèches. Le procédé et son dispositif permettent la réalisation d'unités très compactes pour résoudre les besoins d'élimination des boues. L'invention est particulièrement destinée à l'oxydation thermique in situ des boues organiques produites par les petites et moyennes stations d'épuration.
Na
Sennesael Etienne
LandOfFree
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