RU2219127C2 - Method for precipitation of silica from hydrothermal heat carrier with simultaneous addition of lime and seawater - Google Patents
Method for precipitation of silica from hydrothermal heat carrier with simultaneous addition of lime and seawater Download PDFInfo
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- RU2219127C2 RU2219127C2 RU2002106156A RU2002106156A RU2219127C2 RU 2219127 C2 RU2219127 C2 RU 2219127C2 RU 2002106156 A RU2002106156 A RU 2002106156A RU 2002106156 A RU2002106156 A RU 2002106156A RU 2219127 C2 RU2219127 C2 RU 2219127C2
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- silica
- solution
- lime
- precipitation
- seawater
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Abstract
FIELD: chemical technology. SUBSTANCE: invention relates to method for precipitation of different forms of silica from hydrothermal separate that can be used under conditions of geoelectric power plants, geoheating and power plants and in hydrothermal layers. This method can be used for treatment a separate at 20-160 C and pH value from 7.0 to 9.6. Method involves preparing solution supersaturated by amorphous silica, ageing and polymerization with addition of coagulating agents and stirring solution for formation of flakes and precipitation of silica, separation of flakes from cleared solution and preparing flake slime. At the stage of silica precipitation seawater is added to solution with lime simultaneously and seawater must contain total concentration of calcium and magnesium cations from 800 to 1200 mg/kg. Seawater consumption depends on lime consumption and required level of residual concentration of silica in solution after treatment and calcium concentration in precipitated material. Addition of seawater allows reducing lime consumption and to diminish alternation of pH index of solution after treatment with lime. Method provides the possibility to carry out stable precipitation of silica in small consumption of lime and consumption below critical that provides reduction of calcium part in precipitated material to value below 1.0 weight %. EFFECT: improved precipitation method. 1 dwg, 5 tbl, 3 ex
Description
Текст описания в факсимильном виде (см. графическую часть) То Description text in facsimile form (see graphic part)
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Application Number | Priority Date | Filing Date | Title |
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RU2002106156A RU2219127C2 (en) | 2002-03-06 | 2002-03-06 | Method for precipitation of silica from hydrothermal heat carrier with simultaneous addition of lime and seawater |
Applications Claiming Priority (1)
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RU2002106156A RU2219127C2 (en) | 2002-03-06 | 2002-03-06 | Method for precipitation of silica from hydrothermal heat carrier with simultaneous addition of lime and seawater |
Publications (2)
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RU2002106156A RU2002106156A (en) | 2003-10-27 |
RU2219127C2 true RU2219127C2 (en) | 2003-12-20 |
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RU2002106156A RU2219127C2 (en) | 2002-03-06 | 2002-03-06 | Method for precipitation of silica from hydrothermal heat carrier with simultaneous addition of lime and seawater |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2537406C1 (en) * | 2013-09-04 | 2015-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Грозненский государственный нефтяной технический университет имени академика М.Д. Миллионщикова" | Method of precipitating silica from thermal waters |
-
2002
- 2002-03-06 RU RU2002106156A patent/RU2219127C2/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
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ROTHBAUM H.P. et.al. Removal of Silica from Geothermal Discharge Waters by Presipitation of Useful Calcium Silicates, PROCEEDINGS. SECOND UNITED NATIONS SYMPOSIUM ON THE DEVELOPMENT AND USE OF GEOTHERMAL RESOURCES. - San Francisco, California, USA, 20-29 May, 1975, p.1417-1425. АЙЛЕР Р. Химия кремнезема. - М.: Мир, 1982, т.1, с.23-26, т.2, 422-430. * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2537406C1 (en) * | 2013-09-04 | 2015-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Грозненский государственный нефтяной технический университет имени академика М.Д. Миллионщикова" | Method of precipitating silica from thermal waters |
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MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20130307 |