“JANUB” COMBINED CYCLE POWER STATION / AZERENERGY
Sector: Energy Industry
Location: Azerbaijan
Rawwatersource:KuraRiver
Capacity: 7608 m3/day Sand tfilter System 6672 m3/day Ultra
filtration System 5664 m3/day 1st Step Reverse Osmosis System
4800 m3/day 2nd Step Reverse Osmosis System 4800 m3/day
Demineralization System
The water treatment system designed and installed for “Janub” Combined Cycle Power Station provides the station with 4800 m3 dematerialized water daily using ultra filtration, 2 step reverse osmosis and demineralization systems.
Raw water is chlorinated for disinfection; coagulation is applied to increase productivity of sand filters and the ultra filtration system. After chemical dosage application raw water is stored and is fed into the 2 mechanical filters with GRP housing using 2 feed pumps with 157m3/h capacity each. Automatic multi layer sand filters made from carbon steel and coated with epoxy, filter 317 m3 each hour which is collected in clean water storage. Water is fed into the ultra filtration system using frequency controlled ultra filtration feed pumps designed in two parallel lines with 3200 m2 membrane surface area each for advanced filtration. Ultra filtration system is designed to realize chemical cleaning automatically and periodically.
Water from ultra filtration treatment is stored in product water tank to feed 2 step reverse osmosis system. Three feed pumps of reverse osmosis system have capacity of 157 m3 each and are working as 2 services, 1 standby combination. After antiscalant dosage to prevent clogging on the membrane surfaces, 1 step reverse osmosis system works at 75% efficiency and product water is stored at intermediate storage tank to feed 2 step reverse osmosis system; reverse osmosis systems are designed in parallel and each has 114 membranes. 1st step reverse osmosis product water is fed to the 2nd step reverse osmosis system after pH adjustment and antiscalant dosing. Efficiency of the 2nd step reverse osmosis system is designed to be 85%. Product water from 2nd reverse osmosis system is treated by a degasifier for pH adjustment and carbon dioxide removal, is stored at product water tank and fed to the demineralization system by 2 service and 1 standby pumps with 100 m3/hour capacity each.
Demineralization system is designed to produce 4800 m3 dematerialized water daily with automatic acid and caustic regeneration units and one standby storage tank. Water from chemical backwash is neutralized with acid and caustic before discharge and is discharged by two 100m3/hour capacity discharge pumps each.
The water treatment system with remote control unit supplies “Janub” Combined Cycle Power Station with dematerialized water with 0.1 micro Siemens conductivity and silica content less than 0.02 ppm.
