By using a power plant's pilot device of lignite flue gas water condensation recovery

the effects of cooling water temperature

cooling water flow rate and flue gas flow rate on the quality of condensation recovery water of condensing heat exchanger were studied. The characteristics of condensate water quality were summarized. On this basis

the technical routes of flue gas condensate reuse desulfurization system and boiler water supply system were put forward

and the experiment of ultrafiltration-reverse osmosis dual membrane process for flue gas condensate was finished. The results show that

with an increase in the temperature and decrease in the cooling water flow rate

the flue gas flow rate increased and the water quality of the lignite flue gas condensate became worse. The condensate water is generally strong acidic

its pH value is 2.63～3.51

the conductivity is 261～1 132 μS/cm

the calcium and magnesium hardness and organic matter concentration are low

but the total iron and ammonia nitrogen content is slightly higher. After the reverse osmosis process was applied to treat the flue gas condensate

the recovery rate of the produced water reached over 85% with conductivity less than 15 μS/cm. The system ran stably. The research results can provide reference for treatment and reuse of the lignite flue gas condensate.