Slurry conveying system

Patent · Tue Oct 13 04:00:00 EDT 1987

OSTI ID:5867474

Bergstrom, D A

This patent describes an apparatus for creating and conveying a slurry of particulate material comprised of a mixture of lumps and fines in which the lumps may have a diameter of approximately three inches. It consists of: (a) a closed holding tank having a top, bottom and a truncated cone shaped sidewall; (b) a vertical discharge conduit connected to the bottom of the tank in fluid communication with the interior thereof and having a diameter exceeding the diameter of the lumps in the particulate material to be conveyed by at least twenty five percent; (c) the conduit having a discharge opening adjacent the bottom of the tank and spaced from the tank sidewall and having a vertical longitudinal axis extending centrally through the discharge opening; (d) inlet means connected to the tank for introducing such particulate material into the interior thereof; (e) fluidization means connected to the discharge conduit and constructed and arranged to introduce pressurized water thereinto below its the discharge opening and to force and direct the water in a confined reverse flow primarily along the the axis of the conduit. (f) compressed air injection means connected to the upper portions of the tank; (g) valve means within the discharge conduit for controlling the outward flow of slurry and for closing off the same while the fluidization means is forcing water in a reversed flow through the discharge conduit and its the discharge opening.

• Assignee: Howden Environmental Systems, Inc., Minneapolis, MN
• Patent Number(s): US 4699548
• OSTI ID: 5867474
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
AIR
COAL FINES
COMPRESSED AIR
COMPRESSED GASES
COMPRESSIBLE FLOW
CONTAINERS
CONTROL EQUIPMENT
DESIGN
DISPERSIONS
DUCTS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUIDS
FUEL SLURRIES
FUELS
GASES
HYDRAULIC TRANSPORT
LIQUID FLOW
MATERIALS HANDLING
MATERIALS HANDLING EQUIPMENT
MIXTURES
SLURRIES
SOLIDS FLOW
SUSPENSIONS
SYNTHESIS
TANKS
TRANSPORT
VALVES