Application of reagent-free methods to eliminate the causes of salt deposition in thermal systems on geothermal sources

Abstract

The article deals with the problems associated with the formation of scale on equipment and communications in greenhouse complexes with geothermal heat sources. To prevent scale on the equipment and communications in greenhouse complexes, double-circuit geothermal heat supply systems with intermediate heat exchangers are used, in which fresh softened water is heated with geothermal heat, which is then supplied to consumer needs. In the existing system, the heat exchanger and primary circuit communications in contact with the geothermal coolant are subjected to scale formation. Currently, physical, chemical, biological and combined methods of descaling are used. The article presents the results of the research work on the use of reagent-free methods of treatment of geothermal waters at the enterprise CJSC "Raduga". As a result of the conducted research work, it was decided to install an acoustic-magnetic apparatus. A significant reduction in salt deposition was achieved by acoustic-magnetic treatment of geothermal water using an acoustic-magnetic apparatus. The greatest efficiency of water treatment is achieved by combining ultrasound with a magnetic rotating field. Studies have shown that the acoustic-magnetic treatment of water allows one not only to protect effectively the metal from corrosion, but also to remove salt deposits and corrosion products in a heat supply system. Patents of the Russian Federation were obtained for the method of water treatment presented in the article.