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US 4,396,401 AGranted
Poking system for gasifiers
AssigneeWellman Mechanical Engineering Limited
InventorRoderick M. Davis
Life of this patent
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AssigneeWellman Mechanical Engineering Limited
InventorRoderick M. Davis
Estimating the term…
A poking system for use in checking the condition of and agitating the contents of a coal gasifier utilizes a carriage (22) for transporting a poker (50) around the gasifier from one poke hole (12) to another. The carriage (22) mounts a poker assembly (24) comprising a tiltable arm (30) controlled by hydraulic ram (36) and the poker is incrementally inserted into and with withdrawn from each pokehole (12) by means of a reciprocable slide (38) provide with poker engaging clamps (60) which are operated during the advance or return stroke of the slide (38) depending on whether the poker is to be inserted or withdrawn. A pyrometer (72) is provided on the arm (30) for detecting, during withdrawal, the location of that portion of the poker (50) which has been resident within the oxidation zone of the gasifier.
Apparatus for sensing temperature within the interior of a gasifier, said apparatus comprising a rod, means for advancing and retracting the rod into and out of the gasifier, means for sensing the position of the rod with respect to a datum position at least during withdrawal of the rod and a temperature sensor disposed externally of the interior of the gasifier adjacent the path of travel of the rod for sensing the temperature of the rod along its length as the rod is withdrawn from the gasifier whereby the positions and temperatures sensed by said position-sensing means and said temperature sensor respectively can be combined to provide an indirect indication of the location of one or more temperature-transition zones within that region of the gasifier from which the rod is withdrawn.
Dependencies are inferred from the claim text.