DEVICE FOR REGENERATION SURFACES OF REGENERATION BOILER

The present invention relates to an arrangement in a recovery boiler having a furnace for combusting waste liquor and a flue gas duct comprising vertical flue gas channels (22)， at least some of which are provided with heat recovery units for recovering heat from flue gases. The first flue gas channel (22) downstream of the furnace is provided with a reheater (21) and one of the following heat recovery units: an economizer (25) or a boiler bank (40). The reheater (21) and the second heat recovery unit (25， 40) are located one after the other in the horizontal incoming direction of the flue gas， so that in a flue gas channel the flue gas flows in a vertical direction from above downwards and heats the reheater and the second heat recovery unit simultaneously. According to another arrangement， heat recovery elements of the reheater (50， 60) and the second heat recovery unit (52， 62) are positioned side by side in a direction that is crosswise with respect to the horizontal incoming direction of the flue gas. The present invention relates to an arrangement in a recovery boiler having a furnace for combusting waste liquor and a flue gas duct comprising vertical flue gas channels (22)， at least some of which are provided with heat recovery units for recovering heat from flue gases. The first flue gas channel (22) downstream of the furnace is provided with a reheater (21) and one of the following heat recovery units: an economizer (25) or a boiler bank (40). The reheater (21) and the second heat recovery unit (25， 40) are located one after the other in the horizontal incoming direction of the flue gas， so that in a flue gas channel the flue gas flows in a vertical direction from above downwards and heats the reheater and the second heat recovery unit simultaneously. According to another arrangement， heat recovery elements of the reheater (50， 60) and the second heat recovery unit (52， 62) are positioned side by side in a direction that is crosswise with respect to the horizontal incoming direction of the flue gas.