A power plant boiler air heater drain waste heat recovery system

Abstract

The utility model relates to a kind of power plant boiler air heater drain waste heat recovery system, it is related to waste heat recovery technical field, technical scheme is: including air heater, condenser and first heat exchanger, the first outlet of air heater is connected at the first inlet of first heat exchanger, the first outlet of first heat exchanger is connected on the inlet of condenser.The beneficial effects of the technical scheme are: the high-temperature drain of boiler air heater is carried out secondary heat exchange with the low-temperature return water of heat network circulating water, the heat of boiler air heater high-temperature drain is fully absorbed, drain temperature is reduced, then recycled to condenser in turn, effectively utilize the waste heat of boiler air heater drain, reduce heat source loss, while also improve the return water temperature of heat network, achieve the purpose of waste heat recovery and utilization.Secondly, the reduction of air heater drain temperature is also conducive to the improvement of condenser vacuum, improve the economy of unit.

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