Why is antifreeze water used in temperature and pressure reducers?
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When steam passes through a superheat reducing valve, it is cooled with water at 50 degrees Celsius – why is it necessary to consider anti-freezing measures? Thank you; high marks for the correct answer!
Because when the amount of steam passing through the temperature-reducing regulator is low, there is no need for temperature-reducing water; thus it may not be used in such cases, and anti-freezing considerations must be taken into account.
Isn’t it deoxygenated water that’s used? Steam and deoxygenated water both have insulation, right? As long as they are in use continuously, they shouldn’t freeze. If it is used intermittently, anti-freezing measures will need to be considered in winter
We add insulation, and when it’s not in use in winter, we implement anti-freezing and anti-condensation measures at the ends
Hearing about using 50-degree hot water for temperature reduction for the first time. . Whether it is simply reducing the temperature of the low-pressure steam in the feed steam heater or cooling the medium-pressure and low-pressure steams, we use deoxygenated water at around 105 degrees Celsius. Additionally, in the southern region the lowest temperature is only around -5°C, so it is sufficient to insulate the pipelines from the outside. What the original poster is referring to is mainly preventing the cooling water from freezing when it isn’t in use for an extended period of time.
It is an intermittent operation; anti-freezing measures are needed in winter. Thank you for your comments
I agree with the original poster’s view: the cooling water is deoxygenated water at 105 degrees. When only a small amount of medium-pressure steam passes through, it is not necessary to introduce deoxygenated water. If the temperature is below zero, freezing will occur, so measures must be taken to prevent this, and emergency backup plans should be in place if necessary.