Process and installation for the continuous drying of moist bulk materials, in particular moist coal

• Main Authors: HENRICH,GUENTER,DR, KLEFISCH,RICHARD, HOFFMANN,HARALD,DR
• Format: Patent
• Language: English; German
• Published: 03.12.1987
• Edition: 4
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS,e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USERAPPLICATIONS; DRYING; DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MECHANICAL ENGINEERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

For the energy-saving drying of moist bulk materials, such as for example crude lignite, of high initial moisture to low residual moisture with minimal pollution, according to the invention a drying process is proposed in which the moist material is initially separated into fine material and coarse material and the fine material is dried in an entrained-bed dryer and the coarse material is dried in a fluidised-bed dryer, a particular feature of the invention providing that the vapours produced during the drying are compressed, circulated and the vapour condensation heat of the vapour-containing exhaust-gas flows is introduced into the fluidised bed of the fluidised-bed dryer.