WATER TREATMENT PLANT OF COMBINED HEAT AND POWER PLANT Russian patent published in 2015 - IPC C02F9/04 C02F1/42 C02F1/44 C02F1/52 B01D61/00 

FIELD: heating.

SUBSTANCE: water treatment plant of a combined heat and power plant includes water pre-cleaning unit I, reverse osmosis unit II, ion exchange unit III for deep water demineralisation and a unit for obtaining chemically treated make-up water IV for a heat network. The first deaerator 8 is connected to high-pressure steam boiler 9. Water pre-cleaning unit I includes in-series connected clarifier 2, coagulated water tank 3, mechanical filter 4, as well as washing solution tank 20. Reverse osmosis unit II includes reverse osmosis plant 5. Ion exchange unit III for deep water demineralisation includes in-series connected filter 6 for H-ionisation and filter 7 for OH-ionisation, as well as neutralising tank 17. Unit IV for obtaining chemically treated make-up water for the heat network includes in-series connected tank 18 for chemically cleaned water and the second deaerator 25. Clarifier 2 is connected to FeCl₃ solution tank 27 and to NaOH solution tank 28.

EFFECT: invention allows reducing consumption of reagents and salt content of chemically treated water, as well as simplifying a process flow diagram.

1 dwg, 1 tbl