| 摘要 |
1,254,501. Evaporators, film type. STAMICARBON N.V. 10 Jan., 1969 [11 Jan., 1968 (2)], No. 1693/69. Heading B1B Liquid is evaporated by feeding it through conduit 1 into chamber 2 the lower portion of which is surrounded by steam jacket 4; the liquid is centrifuged by rotor 3 against the peripheral wall of the chamber and flows down the wall as a thin layer, the vapours evolved from the heated layer rise over baffles 9, 10, 8 to discharge conduit 5, and the unevaporated liquid is discharged through outlet 6. Rotor 3 is provided with radially-disposed blades. Annular baffles 8 and 9 are attached to an inner "skin" 7; and baffle 10 is attached to the shaft of the rotor. Liquid droplets, entrained in the rising vapours are flung against the inner skin 7. Liquid ascending along the inside of the inner skin 7 is collected in gutter 12 and flows down pipes 13. The separated liquid flows to trough 14 and thence through slots 15, 16 to the heated wall of the evaporator. Some of the liquid particles travelling along the upper surface of baffle 8 descend annular gap 17 between inner skin 7 and the peripheral wall of chamber 2 and this liquid flows through demister gauze 21 to the heated wall. Any liquid reaching conduit 5 is retained by dam 20. The evaporation may be carried out in vacuo. |
