Chaunskaya Thermal power station is another large consumer of freshwater besides local population in Pevek.
“Iron bodies” are not less fastidious to the freshwater quality than the others, that’s why approach of selecting the right technology and equipment for freshwater production from sea water of Chaunskaya Bay in the East Siberian Sea was very thorough.
The task was complicated as with difficult climate conditions (absolute minimum air temperature is - 50°С, absolute minimum water temperature is -1,9°С), as well as with transportation issues of the required equipment and machinery to the site.
First attempts to partially resolve the issue of freshwater supplying to Chaunskaya Power thermal station were taken right after storage dam depressurization but equipment and machinery of foreign companies couldn’t fix the problem completely; operation of boiler equipment with water treated that way was creating risks of corrosive damage and shutting-down of the only source of heat and energy in town.
In the middle of 2015 “RM Nanotech” reverse osmosis membrane elements were selected for post treatment of pre-desalinated water after the first stage of sea water desalination to the level of the requirements applicable to steam boilers of Chaunskaya Thermal power station.
Reverse osmosis technologies which are the basis of “RM Nanotech” membrane elements operation have better characteristics of water treatment compare to the other traditional technologies. The main reason is the pore size of the selective layer which referring to the reverse osmosis is equal 0.1-10 nanometers. Another important point is less cost of operation. In particular, reverse osmosis systems used during sea water desalination consume twice less power compare to multi stages systems of boiling-up and steam condensation.
Reverse osmosis unit “ATC-40-48” supplied by “AquaTechService” and equipped with “RM Nanotech” membrane elements nanoRO K 8040-C series was successfully built up and put into operation the fourth quarter of 2015. Domestic membranes will produce more than 1000 m3/day of demineralized water for the needs of Chaunskaya Thermal power station which means that the town will be provided with heat and electricity during the coldest season of the year.