Patent GB-486251-A (GB)
Title: Improvements in and relating to the manufacture of manure from garbage
IPC: C05F9/00
Filed: 1937-04-29
Abstract: 486,251. Making manure from garbage. STREIT, H., BOIX, C., and LASSERRE, M. April 29, 1937, Nos. 12234 and 12235. Convention dates, April 29, 1936 and April 22, 1937. [Class 111] Manure is made from garbage by sterilizing the garbage in a closed space, the necessary handling mechanism being controlled by remote-control devices, the garbage being first passed through a screen which eliminates fine material and forwards the coarse material to an autoclave, after which it is conveyed through a sorting device, a brickmaking press and a drier, to be finally crushed and mixed with the fine material, which has been sterilized by blowing hot air through it. In the form shown in Fig. 1, the garbage is shot through a flap r into a hopper n from which a conveyer b leads it to a shaking screen c. The fine material is taken away by a conveyer v, while the coarse material is elevated by a device g and fed to an autoclave a containing an openwork metal cylinder, which after the material has been sterilized by steam supplied at z, is moved to the position a<3> and the material unloaded on to the conveyer j and elevated by a device k to a hopper d<1> feeding a sorting device l where iron matter may be removed magnetically and hand sorting may be carried out. The residue is converted in a hydraulic press p into briquettes, which are dried in a hot air apparatus s. The briquettes are then crushed and mixed with dried fine material from the screen c. The resulting material is crushed and bagged and constitutes a manure. In the sterilization apparatus shown in Figs. 3 and 5, the garbage is shot from a truck 6 through a trap-door 2 in a closed space 1 into a pit 5 from which it is forced by a piston 7 into a hopper 5a. The piston 7 is operated by a hydraulic cylinder, not shown, which is itself advanced into the pit 5 after each stroke of the piston 7 by a rack-and-pinion mechanism, so that arelatively short cylinder may be employed. The garbage falling from the hopper 5a is urged by a piston 11 up a shoot 9. The piston 11 is provided with a guard plate 33 to prevent garbage from falling behind it. The garbage falls at 12 into a shaking screen 13, from which the fine matter falls on to a screw conveyer 15, while the coarse material passes into a hopper 16 having two shoots 17, 18 which are lowered alternately to fill metal baskets 23, 24 supported by frames 21, 22 in pits 19, 20. In the position shown, the basket 24 is being filled, the lid 39 thereof being held open by a hook 53. When the basket 24 is full, the shoot 18 is raised by cord 35 from winch 37, the basket 23 is brought into its pit 19, and the carriage 55 of hook 53 and the carriage 54 of a similar hook 52 are traversed to the left along a rail 56 by cords 54a, 55a, thus lowering the lid 39 while the hook 52 opens the lid 38 of the basket 23. The shoot 17 is then lowered by cord 34 from winch 36. The frame 22 is then swung about its pivot 43 by a cord 45 from a wind 49 into the horizontal position shown in Fig. 3 for frame 21. The door 28 of the autoclave 26 is then withdrawn by an hydraulic ram 62, and the piston 60 of an hydraulic cylinder 58 pushes the basket 24 into the autoclave, the basket being provided with wheels 40, which run on rails 41. The door 28 is then re-closed. When the material has been sterilized, the door 4 of the autoclave is opened by an hydraulic ram, not shown, and the basket 24 taken out, emptied, and replaced. In the position shown, the basket 23 is about to be returned from a second autoclave, not shown. These autoclaves are thus used alternately. The winches 36, 37, 49 are operated by remotely-controlled electric motors.