【Chemical Process Operation】The normal top pressure rises to 120 kPa when the weather temperature is 20 degrees – how to reduce it?
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This post was last edited by Xiao Gong 1985 on 2016-3-15 09:04. This unit uses a flash-vacuum tower system; even slight increases in weather temperature have a significant impact on the pressure in the vacuum tower. When the temperature is 20 degrees Celsius, this pressure rises to 120 kPa, while the pressure in the vacuum tank is around 25 kPa. After heat exchange with crude oil, the vapor from the vacuum tower is cooled by air cooling. With air cooling turned on fully, the temperature of the vapor after water cooling is around 30 degrees Celsius. Could this be caused by a blockage in the vacuum tower’s cooling system, or is there some other reason?
Check whether the pipe diameter changes too rapidly when going from air cooling to water cooling, and from water cooling to the return tank; if light oil is being processed, rapid diameter changes can easily lead to pressure buildup
Turning the water cooling up to its maximum setting doesn’t have a significant effect – could it be that there is a blockage in the area related to the crude oil heat exchanger?
The transition from air cooling to water cooling involves two expansions – what is the likelihood of blockage?