| 摘要 |
The invention relates to a proccess for combusting sulphite liquor, containing magnesium or ammonium and sulphite in some form, in a boiler of the two-chamber type (1, 3). The process is characterized in that the combustion in the first chamber (1) takes place with an understoichiometric quantity of oxygen so that a reducing environment arises, without the addition of reducing substances, in the flue gases, and in that oxygen is then added to the flue gases in the second chamber (3) at a time of 1-2 seconds after the combustion in the first chamber (1) and at a temperature of at most 1,250 DEG C in the flue gases, so that further organic material is combusted without any appreciable formation of NOx and So3. The invention also includes a boiler for implementing the process, which boiler, in contrast to conventional MgO boilers, is provided with supply openings (10) at one or more levels (11, 12) in the second chamber (3) in the bipartite boiler. |
