Method for burning evaporated waste liquor

Details Method for burning evaporated waste liquor Method for burning evaporated waste liquor

D - Textiles, Paper

21

C

9/36.4

D21C 11/12 (2006.01) F23G 5/32 (2006.01) F23G 7/04 (2006.01)

Patent

CA 1271304

Abstract In a method for burning evaporated waste liquor obtained at pulp production in accordance with cooking processes on sodium basis for recovering sodium carbonate and sulphide, the liquor is injected towards the inlet end side of a cylinder-shaped reaction chamber with mainly tangential gas supply. In this cyclone the liquor is dried and pyrolysed by hot fumes recirculated from the outlet portion and obtained through the ejector action of the liquor injection. After ignition of the pyrolysis gas and rests of the liquor the formed smelt is discharged after sulphuration from the outlet portion of the cyclone. The fumes of the cyclone are oxidized in a separate furnace after the cyclone. A stable and, from a process technical point of view, suitable combustion without support firing with any other fuel can be maintained with liquor including 25-40 % of water.

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