Gravity settling

Patent · Tue Jul 22 00:00:00 EDT 1980

OSTI ID:5039095

Davis, H; Long, R; Simone, A

A gravity settler for effecting solid-liquid separation, comprising: a vessel, at least two vertically spaced essentially planar inverted v-shaped plates within the vessel, each of said inverted v-shaped plates being comprised of first and second downwardly oppositely inclined essentially planar sections which extend from the apex of the inverted v-shaped plate within the vessel to the lower portion thereof, adjacent the vessel wall, said at least two vertically spaced inverted v-shaped plates defining an enclosed liquid-solid separating chamber therebetween; inlet means for introducing liquid-solid feed into said chamber; first and second underflow outlet means positioned above and adjacent to the lower portions of said first and second sections of the lower of the at least two inverted v-shaped plates; and overflow outlet means below and adjacent to the apex of the higher of the at least two inverted v-shaped plates for withdrawing clarified liquid from said chamber. A process for separating solids from a coal liquefaction product by gravity settling, comprising: introducing a coal liquefaction product containing dispersed solids into a gravity settler at multiple locations; intercepting the settling path of the solids below each of the feed locations by bringing the solids into contact with essentially planar inclined intercepting surfaces which divide the gravity settler into separate separation zones within the settler to the lower portion thereof, thereby coalesce the solids and increase the solids settling rate, said inclined, intersecting surfaces being at least two vertically spaced, inverted v-shaped plates each being comprised of first and second downwardly oppositely inclined essentially planar sections which extend from the apex of the inverted v-shaped plate to adjacent the settler wall, said at least two vertically spaced inverted v-shaped plates defining a substantially enclosed separation zone.

• Assignee: Lummus Co The
• Patent Number(s): US 4213862
• OSTI ID: 5039095
• Resource Relation: Patent File Date: Filed date 1 May 1978
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL LIQUIDS
PURIFICATION
COAL LIQUEFACTION
COALESCENCE
GRAVITATION
PLATES
PRECIPITATION
SEDIMENTATION
FLUIDS
LIQUEFACTION
LIQUIDS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
010500 - Coal
Lignite
& Peat- Products & By-Products