Abstract:

In order to obtain the investment and operating cost of fluorine plastic heat exchange system in coalfired power plants,its designs for 300MW and 600MW coalfired units with different arrangements and different flue gas cooling range are made, and the investment of the system are calculated. The effects of coal price, unit utilization hours and flue gas cooling range on the operating cost of fluorine plastic heat exchange system are studied systematically. Achievable goals on coal saving and water saving made by fluorine plastic heat exchange system is set.The optimal arrangement for different coalfired units must be made in accordance with their flue gas cooling ranges.Meanwhile, the conclusion that coal price,unit utilization hours and flue gas cooling range have a great impact on operating cost of fluorine plastic heat exchange system is made. Therefore, these factors should be considered in heat exchange system designing.The optimized flue gas cooling range and arrangement should be selected at the same time.

Key words:

coalfired power plants, fluorine plastic, heat exchange system, heat exchanger, investment, operating cost