F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
137/75
F04B 47/00 (2006.01) B65G 53/30 (2006.01)
Patent
CA 1192810
METHOD AND APPARATUS FOR SEQUENCE CONTROL OF VERTICAL MOVEMENT OF SLURRIED PARTICULATES ABSTRACT OF THE DISCLOSURE A method and apparatus for sequence control of vertical movement of slurried particulates from a lower level to the upper levels, more particularly a vertical hoist system for movement of slurry from a subterranean mine area upward through an earthen or cased borehole to a surface station. The vertical pump system includes series-connected pumps having variable speed capability to transport slurry par- ticulate from an underground sump upward to a surface surge tank or other repository. The logic sequence system exer- cises control over valving sequence between the underground pumps and the vertical borehole in order to control slurry surges during start-up, shut-down and emergency dump opera- tions. Thus, the pump input to the vertical conduit utili- zes energy dissipator units as selectively controlled by automated block and by-pass valves to control flow of fluids from the pumps upward through the vertical conduit. Selective control of the dissipator units and valving enable critical start-up, shut-down and the emergency shut-down operations and this is effected by particular sequence control.
419974
Shaw Rick L.
Sweeney William T.
Webb Frederick A.
Conoco Inc.
Ridout & Maybee Llp
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