Patent GB-102284-A (GB)
Title: Improvements in and relating to Centrifugal Separators.
Inventor: BROWN THOMAS ELLIS
IPC: B04B3/02
Filed: 1916-01-26
Abstract: 102,284. Brown, T. E. Jan. 26, 1916. Strainer separators; baskets or drums; driving; charging and feeding; discharging.-The separator drum is provided with a movable top and a reciprocating piston for the ejection of deposits without stopping the machine, and the valves controlling the feed of the material to be treated, and the movement of the deposit-discharging devices, may be automatically operated. The invention is illustrated in two forms in Figs. 1 and 2. In that shown in Fig. 1, the drum 14 is carried by a frame 13 on a hollow shaft 9 and has an axially movable top 20 connected to a piston-like bottom plate 17 by webs 19. The filtering-material 21 is positioned transversely in the top 20 between perforated plates, the outlets for the liquid being pipes 23. Material to be treated is fed in by the pipe 29, and when sufficient deposit has accumulated in the drum, the parts 17, 20 are raised, and the part 17 forces the deposit out into the trough 42. The parts 17, 20 are raised and lowered by a piston 15 working in a cylinder 10. This cylinder 10 connects the part 9 of the main shaft with the part 8, with which it rotates, and is supplied on the upper side of the piston 15 with fluid led in through the hollow piston-rod 16, and on the underside, with fluid led in by the central pipe 18. All these parts rotate, and the pressure on the niston is due to the centrifugal force in the fluid. Spill-holes 45 and a leakage hole 50 are provided in the cylinder. While separation is proceeding, the top 20 is held tightly against a leakage-preventing ring 24, and the plate 17 is packed at the periphery by a fluidpressed ring 27. The trough 42 for the solids is preferably mounted to rotate, so that the solids may be removed from it by a scraper 51. The separated liquid is caught in a trough 41, from which it is led by a pipe 46 to a trough 43, and thence out of the machine. Bearings 3, 4, 5 are provided for the shaft. The liquid for actuating the piston 15 is supplied by pipes 31, 32 connected as shown, and having regulating-valves 33, 34. The machine may be made automatic in operation by opening and closing the pipes 29, 31, 32 automatically at suitable times. This may be effected by valves 38, 39, 40 controlled electrically. The switch 61 has strips 66, 67, 68 wired to the valve solenoids as shown, and a contact-arm 65 carried by a shaft 60 rotated at constant speed by clock-work or other means. In the modification shown in Fig. 2, the top 98 and bottom 96 of the centrifugal drum are moved by a piston 95 in a cylinder 91, which is supplied with fluid under pressure from a pipe 73 by connexions 84, 74. The cylinder 91 also acts as,belt pulley for the main drive. The pipes 73, 74 and the feed-pipe 75 have regulating-valves 78, 79, 81, and the machine may be made automatic by providing valves 82, 83 controlled electrically by a switch 114, the arm 118 of which is rotated at constant speed by a motor 117 through gearing 116, 115. The filtering-medium, in this modification, comprises a coarse screen 103, a fine screen 105, and intermediate granular filtering- material 104, such as sand. One or both screens 103. 105 may be omitted if the granular filter will stay in place. The material 104 may be supplied and packed by centrifugal force while the machine is running, by closing the valve 81 and opening the valve 80 in the sand and water pipe. The outer layer of the filter may be charcoal For removing the filter 104, the plate 109 on the drum is detachable. The trough 110 for the discharged solids rotates, a fixed scraper 111 being provided.