Distillation: processes – separatory – Water purification only – Under pressure or vacuum
Patent
1977-11-28
1980-07-08
Bascomb, Jr., Wilbur L.
Distillation: processes, separatory
Water purification only
Under pressure or vacuum
203 47, 203 48, 203 88, 203100, 203DIG1, 203DIG14, 202174, 23298, 159 1G, 165 45, 299 5, C02B 104
Patent
active
042116139
ABSTRACT:
Minerals are recovered from warm geothermal brines by installing a brine eductor device such as a venturi at the end of a thermally insulated drill casing. The geothermal brine is recovered by flowing a warm, low saline carrier solution at high flow rate through the device to pick up a selected flow of brine. On entering the device the geothermal brine is diluted in an amount sufficient to preclude precipitation and scaling as the mixture flows to the surface. The flow velocity is adequate to entrain any non-dissolved solids without settlement. Thermal losses to the surrounding strata are minimized by the thermal insulation surrounding the casing. The mineral values are recovered from the mixture by flashing, evaporation, and filtration. Clarified solution, filter liquor and make-up water as necessary are combined to form the low salinity carrier solution which is heated in heat exchangers before recycling to the eductor device. The heat exchange fluid may be heated by solar concentrators assisted by fossil fuel, geothermal and/or solar buffer stages.
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Bascomb, Jr. Wilbur L.
Jacobs Marvin E.
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