| 摘要 |
<p>A recovery boiler is provided that may be made larger than conventional soda recovery boilers which burn black liquor to produce energy and to recover chemicals for the kraft pulping process, by providing a particular substantially rectangular configuration of the furnace of the boiler. The ratio of the depth (defined by the side walls) and the width (defined by the front or rear wall) of the furnace is at least 1.15 to 1 (e.g. between about 1.25-1.5 to 1), and a header is provided that is substantially parallel to the side walls of the furnace and which feeds the water tubes at the bottom of the furnace. A steam drum, which is part of the water/steam circulation and which feeds the header using a plurality of downtake pipes, is preferably positioned so that the dimension of elongation of the steam drum is substantially parallel to the front wall of the furnace, and so that the steam drum is behind the rear wall. Recovery boilers may be constructed that effectively burn more than 4,000 (preferably about 5,000) tons of dry matter per day.</p> |
