Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1988-02-29
1989-10-17
Hruskoci, Peter
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
606415, 210734, 210747, 2101953, 210208, C02F 156
Patent
active
048745294
ABSTRACT:
A process and apparatus is provided for reducing the concentration of fine, residual solids still remaining suspended in clarified geothermal brine overflow from a primary brine clarification stage in which hot, flashed, silica-rich geothermal brine, containing suspended siliceous material, is gravity separated, comprises flowing the brine overflow from the primary clarification stage into a closed secondary clarifier vessel having an internal reaction well. Capacity of the secondary clarifier vessel provides a brine residence time in the vessel of between about 45 and about 150 minutes, the brine residence time in the reaction well being between about 10 and about 20 minutes. Brine in the vessel is blanketed with steam flashed from the brine to exclude air from the vessel. In the reaction well, the brine is contacted with a flocculating agent, such as a cationic, anionic, or non-ionic polyacrylamide having a molecular weight of at least about 1 million, in an amount of between about 0.25 and about 2 parts per million. An underflow slurry of flocculated siliceous solids and brine is discharged from the bottom of the vessel. An amount of such underflow slurry is recirculated back into the reaction well to cause the solids concentration in the well to be between about 0.5 and about 3 weight percent. A secondarily clarified brine overflow from the secondary clarifier vessel has a concentration of fine, siliceous material remaining suspended therein that is substantially reduced over the concentration of such material suspended in the brine overflow from the primary clarification stage.
REFERENCES:
patent: 2668144 (1954-02-01), Joos
patent: 3479282 (1969-11-01), Chamot et al.
patent: 3520802 (1970-07-01), Pavia
patent: 3523889 (1970-08-01), Eis
patent: 3680698 (1972-09-01), Liu et al.
patent: 3728253 (1973-04-01), Kaufman
patent: 4055494 (1977-10-01), Emmett, Jr.
patent: 4302328 (1981-11-01), van Note
patent: 4304666 (1981-12-01), van Note
patent: 4309291 (1982-01-01), Probstein et al.
patent: 4370858 (1983-02-01), Awerbuch et al.
patent: 4428200 (1984-01-01), McCabe et al.
patent: 4429535 (1984-02-01), Featherstone et al.
patent: 4536294 (1985-08-01), Guillet et al.
patent: 4588508 (1986-05-01), Allenson et al.
patent: 4728438 (1988-03-01), Featherstone et al.
patent: 4763479 (1988-08-01), Hoyer et al.
patent: 4765912 (1988-08-01), Totten
Seesee et al., "Process Design of Niland Geothermal Energy Program", presented at the 1985 International Symposium on Geothermal Energy, Aug. 1985, Hawaii, pp. 183-187.
"A Cost-Effective Treatment System for the Stabilization of Spent Geothermal Brines", Featherstone et al. (publication date unknown).
"Stabilization of Highly Saline Geothermal Brines", Featherstone et al., SPE Report No. 8269 (undated).
Featherstone John L.
Gallup Darrell L.
Newell David G.
Spang S. Timothy
Hackler Walter A.
Hruskoci Peter
Union Oil Company of California
LandOfFree
Process and apparatus for reducing the concentration of suspende does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and apparatus for reducing the concentration of suspende, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for reducing the concentration of suspende will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1742094