Method and system for utilising biomass and block-type...

C - Chemistry – Metallurgy – 02 – F

Patent

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C02F 11/10 (2006.01) C02F 11/12 (2006.01)

Patent

CA 2755375

The invention relates to a method for reclaiming biogenic mass, in particular sludge, wherein the product to be reclaimed is first dried and then thermally decomposed in a pyrolysis reactor for the purpose of creating pyrolysis gas. The method according to the invention is characterized in that the product is thermally dried in at least two drier stages arranged after one another, wherein the waste heat of the drier stage downstream of the product in the transport direction is used as process heat for the respectively upstream drier stages. The invention further relates to a system for reclaiming biogenic mass, in particular sludge.

L'invention concerne un procédé de valorisation d'une masse biogène, en particulier de boues d'épuration, qui consiste à tout d'abord sécher le produit à valoriser et à le décomposer ensuite dans un réacteur de pyrolyse afin de produire un gaz de pyrolyse. Le procédé selon l'invention est caractérisé en ce que le produit est séché thermiquement en au moins deux étapes de séchage successives, la chaleur résiduelle de l'étape de séchage aval dans le sens du transport du produit étant utilisée comme chaleur de traitement pour les étapes de séchage amont correspondantes. L'invention concerne par ailleurs une installation de valorisation d'une masse biogène, en particulier de boues d'épuration.

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