Energy can be recovered from boiler blowdown by using a heat exchanger to preheat boiler make-up water. Any boiler with continuous blowdown exceeding 4 % of the steam rate is a good candidate for the introduction of blowdown waste heat recovery. Larger energy savings occur with high pressure boilers.
Alternatively, flashing the blowdown at medium or low pressure is another way to valorize the energy which is available (see Section 3.2.14).
鍋爐沖放水中的能量可用一套熱交換器回收以預熱鍋爐的補充水。一座每次連續沖放超過4%以上的鍋爐，適合導入沖放水廢熱回收技術，尤其是高壓鍋爐更為有利。
另一技術是將中低壓沖放水閃化也是一種節能方法(如 3.2.14)。
