Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1985-03-08
1986-10-07
Wyse, Thomas
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210718, 210747, 210790, 606415, C02F 152
Patent
active
046158081
ABSTRACT:
A method is provided for combining a high pH steam condensate with a flow of a acidic geothermal brine from which the steam is extracted so as to inhibit the formation of suspended particulate matter, such as heavy metal sulfides, calcium carbonate and iron hydroxide, by the chemical reacting of such impurities as hydrogen sulfide and ammonia in the condensate with such impurities as heavy metals, iron and calcium in the brine. The method includes acidifying the steam condensate, preferably by hydrochloric acid, to reduce the pH to between about 7 and about 4.5 and then combining the acidified condensate with the brine. In a silica crystallizer stage in which flashed brine is contacted with a silica seed material to cause silica removal from the brine, the treated condensate is combined with the brine in a low pressure crystallizer upstream of brine clarification and reinjection stages. Part of the treated condensate may be flowed to various pumps in the geothermal brine power production system to purge pump seals and prevent pump scaling and excessive wear.
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Featherstone John L.
Gallup Darrell L.
Hackler Walter A.
Lambert Howard R.
Mono Power Co.
Southern Pacific Land Co.
Union Oil Co. of California
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