| 摘要 |
1. A fluidized-bed firing system with generation of steam for the combustion of solid fuels and for generating steam, comprising a heat-exchange chamber (1) in which there are disposed heat-exchange elements (24) through which flows a cooling fluid, the heat-exchange chamber having four vertical outer walls (1a, 1b, 1c, 1d) which enclose a space approximately rectangular in horizontal cross-section, comprising a first fluidized-bed combustion chamber (2) which is disposed before a first outer wall (1a) of the heat-exchange chamber, and comprising a second fluidized-bed combustion chamber (3) which is disposed before a second outer wall (1c) of the heat-exchange chamber opposite the first outer wall, each fluidized-bed combustion chamber having lines for supplying fuel and combustion air, and comprising at least one separator (5, 6, 7, 8) for separating solids (2) from a gas stream, which separator is connected with the upper portion of each fluidized-bed combustion chamber, the separator having a gas-carrying discharge line (9) which is connected with the upper portion of the heat-exchange chamber, characterized in that to each fluidized-bed combustion chamber at least one fluidized-bed cooler (12, 12a) is associated, which is disposed below a separator and is connected therewith by a solids-carrying line, each fluidized-bed cooler being connected with the associated fluidized-bed combustion chamber by at least one line (16, 17) carrying solids and/or gas, and that the inner height of the heat-exchange chamber (1) is at least 10 m and the inner height of the fluidized-bed combustion chambers (2, 3) is 10 to 60 m. 2. The fluidized-bed firing system as claimed in claim 1, characterized in that the distance between the first fluidized-bed combustion chamber (2) and the first outer wall (1a) as well as the distance between the second fluidized-bed combustion chamber (3) and the second outer wall (1c) of the heat-exchange chamber is 0 to 2 m. 3. The fluidized-bed firing system as claimed in claim 1, characterized in that the cross-sectional area of each of the two fluidized-bed combustion chambers (2, 3), measured horizontally and at half height of the interior of the chamber, is 50 to 300 m<2>. 4. The fluidized-bed firing system as claimed in claim 1, characterized in that the interior of the first and second fluidized-bed combustion chamber (2, 3) is approximately rectangular in horizontal cross-section. 5. The fluidized-bed firing system as claimed in claim 1, characterized in that the heat-exchange chamber (1) and the fluidized-bed combustion chambers (2, 3) have a width of 10 to 40 m. 6. The fluidized-bad firing system as claimed in claim 1, characterized in that to at least two heat-exchange chambers (1) at least three fluidized-bed combustion chambers (2, 3, 4) are associated. |
