GB251052A - Improvements in or relating to an apparatus and process for distillation of solid fuels and other substances - Google Patents

Abstract

251,052. Merz & McLellan, and Weeks, E. G. Feb. 25, 1925. Discharging. - Coke is extracted from a vertical retort by a series of discharge devices which are operated in such a manner that there are produced, within the charge, vertical zones in which periods of quiescence alternate with periods of movement through the retort. As shown, the discharge devices comprise oscillatory pocketted rollers 35 which may be constructed according to Specification 251,051 and which are all operated at the same time or some operated while the others remain stationary. Separate driving gear is provided for each roller 35 and curved partitions 36 are fitted between adjacent rollers. To each roller shaft 10 is secured a toothed wheel 11 on which is fitted a spring strip 33 adapted to reverse the direction of rotation by throwing over a double-arm snap-over pawl 14 ca.rried between a pair of driving arms 12 which are pivoted on the shaft 10 and oscillated by a mechanically, hydraulically, or electrically actuated rod 20. The motion of the rod 20 is communicated to the arms 12 through a clutch device which is automatically disengaged should any jamming of the roller 35 occur and which can be declutched by the hand-lever 28 when it is desired to stop the roller. The lever 28 is pivoted at 29 and secured at 30 to a pin 25 which is normally held, by the adjustable spring 27, in engagement with a notch 24 in a member 23 connecting arms 21, these latter being pivoted at 22 to the main arms 12 and having a second spacing member serving as a pivot for the driving rod 20. When hydraulic driving apparatus is used, the clutch device may be dispensed with, each hydraulic cylinder being so gauged as to exert only sufficient pressure to drive the roller under normal conditions.