Deaerator height
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The water in the tank is at 90 degrees Celsius. The outlet of the tank is 4.5 meters higher than the pump, the pump has a head of 30 meters, and the water is sent to a deaerator at a height of 15 meters with a pressure of 0.15 MpaA. Is this pressure sufficient? How is the inlet pressure calculated? Thank you, thank you
If you are interested in this, it is recommended to get a copy of \"Principles of Chemical Engineering\" to read. This book is a reference book. For reference.
At 90°C, the saturated vapor pressure reaches 70 kPa; it’s no longer a question of whether the pump has sufficient pressure, but rather whether the pump will suffer from cavitation
This post was last edited by lupg on 2022-2-25 at 20:46. Due to the lack of data such as pipe diameter and flow rate, an approximate estimate of 5 m/s is used for reference: 1. If it is a tank under atmospheric pressure, the pressure at the liquid surface of the tank is 0.1 MPaA； Ignoring pipe resistance, the liquid column pressure at the pump inlet is 0.045 MPa ； Then the pressure at the pump inlet flange is 0.145 MPaA. 2. The surface pressure at the deaerator level is 0.15 MPaA ； Ignoring pipe resistance, the liquid column pressure at the pump outlet is 0.15 MPa ； Then the pressure at the pump outlet flange is 0.3 MPa. 3. The required head is: 0.3 – 0.145 = 0.155 MPa (~15 m); therefore, a head of 30 m selected is feasible. 4. An effective net positive suction head of around 5 meters or more is sufficient; ordinary centrifugal pumps can meet this requirement. 5. Even taking pipeline resistance into account, the configuration chosen by the original poster is not overly demanding.