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    • 9. 发明专利
    • Improvements in and relating to drying apparatus, suitable for the drying of tea andother materials
    • GB356385A
    • 1931-09-10
    • GB2148530
    • 1930-07-16
    • MERVYN JOHN BALDWIN
    • F26B17/00
    • 356,385. Rotary drying- apparatus. BALDWIN, M. J., Sangsua Tea Estate, Gatonga, Upper Assam, India. July 16, 1930, No. 21485. [Class 34 (ii).] In apparatus for drying tea &c., of the type wherein a number of rotatable rings are arranged one above the other in a casing 1, the rings carrying trays which are automatically tilted during rotation to spill the material on to the trays below in succession, the drying air is introduced through the top by a pipe 3 extending vertically downwards, a baffle 4 directing the air upwards through the trays. The tea &c. is fed from a hopper 44 to the uppermost ring of trays by a band conveyer 28, an adjustable tapered spreader 47 regulating the depth of the tea across the band.. The trayrings, are rotated by pinions 24 on an external vertical spindle 22 driven from gearing 30, which engage toothed rings 13 on the tray-rings. The tray-rings are formed of inner and outer hoops 11, 10 provided with rollers (not shown) running in circular angle-irons 5, 8. The perforated trays 38 are pivoted on radial rods 40 extending between the hoops 11, 10, and their outer edges rest on the angle-irons 8 in each of which a gap or gaps are made to permit the trays to fall periodically during rotation of the rings. The tea finally falls through an air-lock 49 and is discharged by a conveyer 50. The drying air may be discharged to the atmosphere or led back again to the heating plant. The casing may be built up of sections bolted together, the air-heating plant being adjustable according to the number of sections employed.