System for producing energy at a pulp mill

F - Mech Eng,Light,Heat,Weapons – 22 – B

Patent

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Details

F22B 31/04 (2006.01) D21C 11/12 (2006.01) F22B 37/14 (2006.01) F23G 5/46 (2006.01) F23G 7/04 (2006.01) F23M 5/08 (2006.01)

Patent

CA 2488062

The present invention relates to a spent liquor recovery boiler system comprising a boiler having a water/steam circulation system having superheaters and a furnace for recovering energy and chemicals from spent liquor combusted therein, the walls of the boiler being formed of a plurality of water-cooled tubes connected to the water/steam circulation system. The system is provided with at least one cavity having walls formed of water- cooled tubes connected to the water/steam circulation system, means for combusting a fuel and at least one outlet for discharging combustion gases to the boiler, the interior of the at least one cavity being provided with heat exchanger means for final superheating of the steam generated in the boiler, said heat exchanger means being connected to the superheaters of the boiler.

La présente invention concerne un système de chaudière à récupération de liqueur résiduaire qui comprend une chaudière pourvue d'un système de circulation d'eau/vapeur comportant des surchauffeurs et un fourneau pour la récupération d'énergie et de produits chimiques provenant de la liqueur résiduaire brûlée dans celui-ci, les parois de la chaudière étant formées d'une pluralité de tubes refroidis par eau reliés au système de circulation eau/vapeur. Le système est pourvu d'au moins une cavité dont les parois sont formées de tubes refroidis par eau reliés au système de circulation eau/vapeur, des moyens servant à brûler un combustible et au moins un orifice de sortie permettant la décharge des gaz de combustion dans la chaudière, l'intérieur de la cavité ou des cavités étant pourvu de moyens d'échange de chaleur pour la surchauffe finale de la vapeur générée dans la chaudière et lesdits moyens d'échange de chaleur étant reliés aux surchauffeurs de la chaudière.

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