I have a question about heat exchangers for everyone
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For the crude oil stabilization project, there are three feed heat exchangers for the stabilization towers (BFS1200-2.5-400-6/25-2I), connected in series. After operation begins, gas is intermittently released from the middle heat exchanger (let’s call it Heat Exchanger B); what is released is likely light components, not air. Please help diagnose what the problem is.
Improper operation of the stabilizer tower leads to flooding of the tower, or it may be due to issues with the equipment itself.
It has been two weeks since operation started, and it has remained in this state; the tower shouldn’t get flooded all the time, right?
{:3_54:} Your preheater is too efficient; reduce the heat input from the second heat source accordingly
{:3_58:} I just realized that you use a base liquid to preheat the material. Increase the amount of base liquid on your right side as appropriate. If it’s not necessary, connect the level control interlock with the one on the right side; try to keep the flow rate on the left side stable. What is the purpose of the bypass between the feed and discharge ports on your left side? How can two kinds of materials be mixed together? . .
High temperature, or low pressure at the pump outlet
The bypass is an accident bypass system equipped with a shut-off valve; in case of an emergency, it can be opened immediately, allowing the material to flow back directly.
Is the temperature of the heat exchanger too high, causing the light components to vaporize?
It seems that this heat exchanger, which is designed for primary preheating, has too much design margin, resulting in excellent preheating performance. If the process cannot be adjusted, then the tubes of the heat exchanger should be blocked to reduce its heat exchange area!
You can tell by checking the outlet temperature of the heat exchanger; there are cases where the feed is preheated to its bubble point. The key is to see if there is any impact on the product, and whether there are phenomena such as liquid slugging in the equipment.