Acidifiction of steam condensate for incompatibility control dur

Details Acidifiction of steam condensate for incompatibility control dur Acidifiction of steam condensate for incompatibility control dur

1983-12-30

1985-06-11

Wyse, Thomas

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210718, 210747, 210790, 606415, C02F 152

Patent

active

045227284

ABSTRACT:
A method is provided for combining a high pH steam condensate with a flow of an acidic geothermal brine from which the steam is extracted so as to inhibit the formation of suspended particulate matter by the chemical combining of impurities in the condensate and brine. The method includes acidifying the steam condensate, preferably by hydrochloric acid, to reduce the pH to between about 7 and about 5.5 and then permitting the acidified condensate to outgas such volatiles as hydrogen sulfide and carbon dioxide before combining the condensate with the brine, formation of such insolubles as heavy metal sulfides and calcium carbonate being thereby inhibited. 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 is 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 et al., "Stabilization of Highly Saline Geothermal Brines", Soc. of Pet. Eng. AIME, No. SPE8269(1979).
Tardiff, "Using Salton Sea Geothermal Brines for Electrical Power", Lawrence Livermore Lab., Preprint No. UCRL-79468, 5/1977.
Kestin, "Sourcebook on the Production of Electricity from Geothermal Energy", Brown Univ., Publication No. DOE/RA/4051-1, 3/1980, Chap. 4, p. 536.

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