Patent GB-191317887-A (GB)
Title: Improvements in or relating to Vertical Coking Retorts.
Inventor: LUETZ JOHANN
IPC: C10B1/04
Filed: 1913-08-05
Granted: 1914-08-07
Abstract: 17,887. L³tz, J. Aug. 5, 1912, [Convention date]. Charging and discharging. - To effect the continuous working of vertical annular coking- retorts with periodic removal of the coke, the whole charge is allowed to sink continuously, apart from the stoppage necessary for the removal of the lower part of the charge. The charge is supported by a rotatable platform mounted on hydraulic plungers and contained within a casing having a coke-discharge outlet. Water is allowed to escape continuously from the plunger cylinders through a small opening, which is in communication with a pipe connecting all the cylinders, in consequence of which the charge sinks slowly at first and then, owing to the discharge valve from the cylinders being opened, is allowed to sink quickly until it is brought to rest. The charge remaining in the retort is then supported by grate bars inserted by hydraulic pistons, and the platform is rotated and the charge removed by a stripper which lies normally in a recess in the casing. The platform is afterwards raised and the grate bars supporting the charge are withdrawn, after which the platform sinks slowly again and the operation is repeated. Rotation of the supporting-platform g, Fig. 1<a>, through one revolution causes the stop 1, Fig. 4, to turn the two-armed lever 2 through 45 degrees. A second rotation of the platform causes the lever 2 to rotate through a further angle of 45 degrees and the valves 3, 4, 5, 6, Fig. 5, are changed over. The valve 3 is thus opened and pressure water is admitted to one side of the piston of the control device q, while the valve 4 is opened to discharge water from the other side. The inlet valve 6 which admits water under pressure to the opposite side is closed and the discharge valve 5 for this side of the piston is opened. The piston moves to the left and places the stripper l into its normal position. At the same time, the stop 7 on the piston-rod strikes the levers 8, 9 and throws the gear for driving the platform g and the discharge scraper n out of operation. The stop 7 also, by means of its hinged portion 10, Fig. 4, strikes the levers 11, 13 and operates the outlet valve 12 and inlet valve 14 respectively for the cylinders of the plungers f which, in rising, raise the platform g nearly to the bars i for supporting the charge remaining in the retort. The bar 23 is held in its raised position by the quadrant and pawl 22. Towards the end of the upward stroke, the stops 15, 18, Fig. 4, attached to the plunger f, raise the levers 16, 19 respectively and operate the three-way valves 17, 20 controlling admission of water to the pistons for operating the grate bars which are then withdrawn. Also the lever 21 raises the pawl 22 and the rod 23 is released, and the valve 14 is closed. The plungers now begin to sink slowly owing to the escape of water from the aperture 24. When the plungers have sunk to a given extent, the pivoted stop 25 strikes the lever 26 and the valve 17 is operated to admit water to the pistons for inserting the grate bars. The valve 20 is also turned so as to allow for the discharge of water and the lever 21 strikes the stop 29 and opens the outlet valve 12 from the cylinders of the plungers f. Shortly before the end of the stroke, the lever 27 depresses the lever 28 and the valves 3, 4, 5, and 6 are changed over, so that the piston of the control device q moves to the right and throws the driving-gear for the platform g and the scraper n into operation and also moves the stripper l into its discharging position. The coke is discharged from the outlet k in the casing e, and falls into a trough m, Fig. 3, filled with water from which it is carried by the travelling scraper over the grate o to a conveyer. Fine particles of coke fall into the chamber p from which they are removed from time to time. The coke may be partly quenched by injecting water through nozzles (not shown) in the walls of the casing e. Coal is fed to the retort from a hopper b, Fig. 1, by means of drums c and shoots d, which are surrounded by passages d' for the escape of gas.