Foster Wheeler Energia Oy

Arto Jantti

Olli E Arpalahti

Ossi Ikonen

The invention relates to a method and apparatus for cooling the exhaust gases of a molten stage furnace. The method relates to furnace structures in which the shaft (3) is vertical and the exhaust gases are passed through an outlet in the furnace roof to the cooling equipment without recovering heat from the exhaust gases through the wall portions above the furnace. The exhaust gases are cooled in two stages first indirectly by a circulating mass cooler (1) and then further in a waste heat recovery boiler. In the apparatus according to the invention, the vertical shaft section above the furnace is connected to a circulating mass cooler which is connected to a waste heat recovery boiler arranged, e.g., next to the furnace and/or the shaft.

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Joroinen, Finland

Arto Jantti