Geothermal power plant scale separation method and apparatus

Details Geothermal power plant scale separation method and apparatus Geothermal power plant scale separation method and apparatus

1992-09-16

1994-04-26

Look, Edward K.

Power plants

Utilizing natural heat

Geothermal

60646, 60657, 210747, 210170, F01K 2700, F03G 700

Patent

active

053056078

ABSTRACT:
In a geothermal electrical power generating plant of the type employing one or more flash crystallizers and one or more reactor clarifiers for processing a large quantity of particulate silica that precipitates out of the hot geothermal brine as thermal energy is extracted during power production, method and apparatus for continuously separating toxic particulate scale out of the nontoxic particulate silica. A portion of the clarifier sludge underflow is treated to cause vertical separation of the scale particles from the silica particles by means of a continuous vertical countercurrent decantation process in which a liquid slurry of the silica and scale particles is flowed upwardly at a velocity greater than the terminal settling velocity of the silica and less than the terminal settling velocity of the scale. Such separation minimizes toxic waste disposal problems, and enables the large amount of particulate silica waste to be disposed of as ordinary landfill, or as an ingredient of concrete or for other purposes.

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patent: 4304666 (1981-12-01), Van Note
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patent: 4849101 (1989-07-01), Desjardins
patent: 5116516 (1992-05-01), Smisson
patent: 5147535 (1992-09-01), Bernhardt

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