Additive to be sprayed into the combustion chambers of...

C - Chemistry – Metallurgy – 10 – L

Patent

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C10L 10/04 (2006.01) B01D 53/64 (2006.01) B01D 53/70 (2006.01) C10L 10/02 (2006.01)

Patent

CA 2261037

An additive is sprayed into the combustion chambers of heating and waste incineration plants to prevent high temperature corrosion and to reduce the fly ash proportion in the exhaust gas. Also disclosed is a process for preventing high temperature corrosion and for reducing the fly ash proportion in the exhaust gas from heating and waste incineration plants. The disclosed additive consists of acid activated bentonite and/or oxide melts, in particular glass powder or glass dust with a melting point below 1000 ~C, and is sprayed into the gas chamber in areas in which the gas temperature exceeds 700 ~C.

L'invention concerne un additif destiné à être injecté dans des chambres de combustion d'installations de chauffe et d'incinération de déchets pour empêcher la corrosion à haute température et réduire la proportion de cendres volantes dans les gaz de combustion. L'invention concerne également un procédé pour empêcher la corrosion à haute température et réduire la proportion de cendres volantes dans les gaz de combustion produits dans des chambres de combustion d'installations de chauffe et d'incinération de déchets. L'additif est constitué de bentonite activée par voie acide et/ou de matières fondues d'oxydes, notamment de verre pulvérisé ou de poussière de verre présentant un point de fusion inférieur à 1000 ·C. Ledit additif est injecté dans la chambre des gaz, dans des zones où la température des gaz est supérieure à 700 ·C.

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