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US 4,101,174 AGranted
Slurry control system
AssigneeContinental Oil Company
InventorThomas R. Miller
Life of this patent
Estimating the term…
Abstract
A liquid level sensor for determining the fluid level in a container and for controlling a fluid inlet to the container in response to the fluid level therein. The sensor includes a buoyant liquid-filled flexible conduit or liquid-filled hinged pipe member in the container and a pressure transducer responsive to the head pressure of the liquid in the flexible conduit or hinged pipe member.
Claims4
A slurry handling system for removing coal particles from the interior of a coal mine to the surface comprising:
- (a) a slurry hopper located in the interior of a coal mine;
- (b) a conveyor for feeding coal particles to said hopper;
- (c) a controlled liquid inlet for feeding liquid to said hopper;
- (d) a slurry pump connected to said hopper by a slurry outlet for discharging a slurry of said coal particles and said liquid from said hopper to a collecting point where coal particles may be separated from said liquid;
- (e) a compartment in fluid communication with said hopper;
- (f) a liquid-containing conduit having a first free end positioned in said compartment and adapted to float within said compartment at a level dependent on the level of fluid in said compartment;
- and
- (g) a pressure transducer connected to said compartment and responsive to head pressure in said liquid-containing conduit, said pressure transducer being operatively connected to a control valve controlling said controlled liquid inlet to control the amount of said liquid being fed to said hopper in response to the liquid level in said hopper.
5 more elements
Dependencies are inferred from the claim text.