Waste heat boiler evaporation volume and make-up water volume
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For a 10 tons per hour waste heat boiler, what should be the water supply volume, in other words, what should be the appropriate boiler capacity? What is the evaporation rate, how much water needs to be added, and how much wastewater is generated?
1 For the steam-water balance in boilers, the water inflow volume = steam output volume + continuous blowdown volume + periodic blowdown volume. 2 The amounts of continuous blowdown and periodic blowdown depend on the quality of the water supplied
The boiler feed water volume equals the evaporation volume plus the blowdown volume; the blowdown volume varies depending on the water quality, generally ranging from 2% to 5% of the evaporation volume. That is, it is a waste heat boiler with an evaporation capacity of 10 t/h; the water supply rate is approximately 10.2–10.5 t/h, while the sludge discharge rate is about 0.2–0.5 t/h.
I’d like to ask gently: why is the water flow rate in our company’s economizer 1.1 times the evaporation rate? Thank you to the expert for the guidance, Ac