deaerator
Thread Content
In a thermal deaerator, high-temperature steam is used to heat the water inside to a temperature of around 104 degrees, at a pressure of 0.2 bar(g), in order to remove oxygen from the water; therefore, when high-temperature steam is used for heating, the pressure inside must be high. When water absorbs the heat from high-temperature steam, the pressure gradually decreases. So, does this mean that the pressure of 0.2 bar is resulting from the water having completely absorbed the heat from the steam, or is it the pressure generated by the high-temperature steam itself that is 0.2 bar? ? ? Is there any formula for calculation?
The magnitude of the pressure difference, with a constant front pressure, depends on the magnitude of the rear pressure. The deaerator is a slightly pressurized container whose outlet is connected to the atmosphere; however, since the exhaust pipe at the outlet has a significantly reduced diameter compared to the overall size of the container, there is some resistance present! I suggest you take a look at its internal structure; it will help you understand this issue! http://www.hb114.cc/textqi/hybj002/image/20150203/20150203112524_9430.jpg
Looking at the structure inside, in some cases steam is ejected from the bottom up, while in other cases it is ejected from the upper part of the tank; the resulting pressure differences are significant