| Title | Technogenic Precipitation in the Structures of Mutnovsky Geothermal Power Complex (South Kamchatka) |
|---|---|
| Authors | CHERNEV I., OKRUGIN V., OKHAPKIN N., ANDREEVA E., SHADRIN A., YABLOKOVA D |
| Year | 2015 |
| Conference | World Geothermal Congress |
| Keywords | geothermal power plant, Mutnovskoe deposit of hydrotherms, geothermal resorvoir |
| Abstract | Mutnovsky geothermal power complex was created on the basis of Mutnovsky deposit of hydrotherms. The capacity of this biggest in the Russian Federation geothermal power complex of is 62 Mvt. At present the complex consists of two geothermal power stations – Verkhne-Mutnovskaya (12 Mvt) and Mutnovskaya (50 Mvt). Verkhne-Mutnovskaya power station was built as a pilot power object for base service of operation technologies and testing new engineering designs. It was of importance to gain experience of building and operation of complex power plants under harsh climatic and geological conditions of the region having no any infrastructure. The station has three turbogenerators, 4 Mvt each. It was built by a block-module method and launched in 2000. The main module of the complex – Mutnovskaya geothermal station with capacity of 50Mvt – started to generate electricity in 2002. The area of Muntovskoe deposit of hydrotherms is about 80 km2 (according to isotherm 150 С). Geothermal reservoirs of the deposit are of composite shape, they are located at depths from 300 down to 2000 meters from the surface. Temperatures of these geothermal reservoirs vary from 240 up to 300 С. Geothermal heat carrier (steam-water mixture) is carried to the work area of the power complex by wells. Composition of this steam-water mixture varies depending on the structural location of the well. While operating, at metal constructions of different elements of manufacturing equipment there takes place precipitation of various minerals and compounds. The following ones have been identified among them: oxides and hydroxides of Fe, silica, sulphides of Fe, Cu, Zn, Pb, silicates, native silicon. Aggregates of amorphous silica and native silicon are of special attention. They form nanoparticles of ideal spherical shape. Clarification of conditions of technogenic precipitation accumulation is of important practical and theoretical significance. It will enable to make power complex equipment life longer. Knowledge of parameters, by which nanoparticles of amorphous silica and native silicon are formed, is of great importance for perfection of synthesis technologies of composite materials. |