| 摘要 |
PCT No. PCT/SE91/00774 Sec. 371 Date Nov. 20, 1990 Sec. 102(e) Date Nov. 20, 1990 PCT Filed Nov. 14, 1991 PCT Pub. No. WO92/08938 PCT Pub. Date May 29, 1992.In a method for drying a particulate material, the material is supplied into a first drying conduit where it is dried and transported to a first cyclone by means of drying air. The material is separated from the drying air in the first cyclone. The separated material is supplied into a second drying conduit where it is dried and transported to a second cyclone by means of drying air. The material is separated from the drying air in the second cyclone. The drying air is discharged from the respective cyclone. The major part of the drying air discharged from the first cyclone is conveyed to a condenser so as to be subsequently supplied into a first drying conduit, while the remainder thereof is discharged. An amount of the drying air discharged from the second cyclone, which corresponds to this remainder, is conveyed to the condenser to be supplied into the first drying conduit. The remainder of the drying air discharged from the second cyclone is supplied into the second drying conduit. An amount of fresh air, which corresponds to the remainder of the drying air discharged from the first cyclone, is supplied into the second drying conduit. |
