| 摘要 |
The present invention refers to a process for drying solid organic substances in aqueous phase that comprises the steps of:
- feeding a continuous flow of such organic substances having a water content ‰¥ 50% by weight into a turbodrier (A) comprising a cylindrical tubular body (1) with horizontal axis, equipped with inlet and outlet openings (5,6), a heating jacket (4) to bring the inner wall of the tubular body (1) to a predetermined temperature, a bladed rotor (7), extending inside the cylindrical tubular body (1) where it is made to rotate at peripheral speeds between 15 and 40 m/s, so as to disperse the continuous flow of organic substances into a flow of particles of organic substances;
- centrifuging the particles of organic substances against the inner wall of the turbodrier (A) heated to a temperature above 130°C, with formation of a thin, dynamic, highly turbulent tubular fluid layer, which advances substantially in contact with the inner wall of the turbodrier (A) towards the outlet opening (6);
- continuously discharging, from the turbodrier (A), a flow of organic substances in disgregated wet solid form having a water content ‰¤ 45% by weight, preferably between 20 and 40% by weight;
- continuously feeding the flow of disgregated wet solid into a drier (B) operating at a temperature lower than or equal to 160°C;
- continuously discharging a flow of dry product having a water content ‰¤ 20% by weight from the drier (B). |
