| 摘要 |
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 H2S and CO2, as well as small quantities of acid and B(OH)3. The removal of the more troublesome and corrosive agents, H2S and CO2, 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 H2S and CO2 are ionized in solution as acids and acid salts and do not separate out as gases.
|
