Stirred three-stage fractional condensation
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I read in the documentation that a sudden and significant increase in the temperature of the first-stage stripping condenser can cause the pressures in stages two and three to drop or even reach zero, resulting in negative pressure. I don’t quite understand this sentence. Could some expert please explain it? Thanks, bonus points!
This post was last edited by Green Lotus on 2018-6-5 at 11:11. The temperature in Section 1 increased suddenly, likely due to a sudden significant increase in the steam flow at the bottom of the stripping tower, which caused flooding in the tower. This led to an increase in the temperature in Section 1 and in the liquid level; water ended up in the side-line pipelines, and the amount of gas-phase components decreased, thereby affecting Section 2 as well. The three-way pressure drops.
The increase in temperature of the primary condenser leads to a decrease in its water separation capacity; as a result, the water vapor content in the gas exiting this condenser rises. Due to the lower operating temperatures of the secondary and tertiary condensers, a large amount of water vapor precipitates in these condensers. At the same time, a significant amount of ammonia dissolves in the liquid phase within the secondary and tertiary condensers, which reduces the amount of gas present and lowers the pressure.