Optimizing the quality of steam from geothermal fluids

Details Optimizing the quality of steam from geothermal fluids Optimizing the quality of steam from geothermal fluids

1980-05-19

1982-03-16

Spear, Jr., Frank A.

Gas separation

Means within gas stream for conducting concentrate to collector

606415, B01D 1400

Patent

active

043198953

ABSTRACT:
This invention relates to a method of optimizing the usable content of geothermal fluids to make use of steam in the largely aqueous and heated fluid. These fluids contain non-condensable gases, such as H.sub.2 S and CO.sub.2, as well as small quantities of acid and B(OH).sub.3. The removal of the more troublesome and corrosive agents, H.sub.2 S and CO.sub.2, is expressed here by utilization of pH control in an evaporator or series of evaporators. At an acid or low pH (3 to 5) in the input side of an evaporator, the non-condensable gases are non-ionized and exert partial gas pressures, and in the input chamber they may be removed or separated from the condensable gases. In the condensate side of the evaporator where the pH is maintained in the alkaline range and preferably about 11, the H.sub.2 S and CO.sub.2 are ionized in solution as acids and acid salts and do not separate out as gases.

REFERENCES:
patent: 3420775 (1969-01-01), Cadwalloder
patent: 3501384 (1970-03-01), Stermer
patent: 3782468 (1974-01-01), Kuwada
patent: 4062764 (1977-12-01), White et al.
patent: 4123506 (1978-10-01), Spevack
patent: 4247371 (1981-01-01), Roller
Hydrogen Sulfide Abatement at Geothermal Wells, Harry Gastrantas et al., presented at Geothermal Env. Seminar, Lake County, Calif. Pollution Control Board, Oct. 28, 1976, pp. 1, 8, 9.
How Steam is Produced and Handled at the Geysers, Robert Snyder, World Oil, Jun. 1975, pp. 43-48.

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