Device for drying water-based suspensions of nanostructured boehmite

摘要

Apparatus for drying a water-containing boehmite slurry is as follows: by line (1) boehmite slurry from the reactor enters the drying unit (2) heated to a temperature of 320 ° C where the pressure of 10-15 MPa is created and maintained at a temperature 300-330 ° C. In the range from 0 to 12 minutes produced several short discharges of water vapor through the valve 1 and the nozzle (6) after which the pressure is reduced to 5 MPa and the temperature is lowered to 250 ° C. With these parameters, it becomes possible sufficiently intense flow of superheated steam. After 12 minutes produced a sharp depressurization via valve 2 (8). Further drying unit heating elements are switched off. After cooling the dry powder of boehmite blown dry nitrogen pressurization apparatus 3 through the valve (9).