How should the pressure of the boiler continuous blowdown expansion tank be calculated in practice?
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I would like to ask everyone: a boiler’s drain line is essentially a flash tank. What determines the steam pressure after flashing? Is it determined by the liquid level? The continuous steam is connected to the deaerator, whose operating pressure is 0.02 MPa; I selected the continuous steam system based on an operating pressure of 0.15 MPa. May I ask, what is the steam pressure during normal operation – 0.15, or slightly higher than the 0.02 pressure in the deaerator?
The continuous blowdown expansion vessel of the boiler is connected to the deaerator; for a deaerator operating at a constant pressure, the operating pressure of the continuous blowdown expansion vessel is determined by the pressure of the deaerator.
Thank you. If the deaerator is not used and a ejector is connected to the steam outlet, can the actual operating pressure of the exhaust stream be increased to 0.15?
Hello, if I want to control the pressure inside a series of expansion vessels, what are the common methods used for that?
This post was last edited by Watt Energy Saving on 2018-1-18 at 15:44. The pressure of the waste vaporization tank is determined not by the pressure of your boiler nor by the design pressure of the tank; it is generally determined by the pressure of the equipment that uses steam. Because you are connected directly to the deaerator, if the piping for the flash steam is properly selected and the transmission distance is short, the pressure in the flash tank will be slightly higher than that in the deaerator. However, if the steam supply pressure to the deaerator is unstable or its operation is not stable, an overflow valve that leads to direct drainage is usually installed at the connection to the flash tank to prevent overpressure in it. The safety valve of the flash tank generally serves only to protect the flash tank itself. A check valve also needs to be installed between the flash tank and the deaerator to prevent issues that may arise from asynchronous operation.