The deethanization effect of the deethanizer is poor
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In the light hydrocarbon recovery process, the previous approach was to cool the material in an evaporator before sending it to the deethanizer; however, the process has been modified now such that the material coming out of the evaporator first enters a low-temperature separator, and the liquid phase obtained from this separation is then sent to the deethanizer. The effect is not as good as before; I would appreciate it if fellow sailors could help analyze the reasons. This post was last edited by brainandrain on 2009-4-6 18:22]
Could it be because the feed temperature has dropped? The operating conditions of the deethanizer have changed: the temperature, flow rate, and properties of the material have all changed. The internal components of the tower are not adapted to these new conditions, which results in a reduced efficiency of deethanization.
If ethane comes out of the top of the tower as a volatile component, both the feed condition and the feed volume change, the operating line changes, and the product quality will definitely be affected!
In our process, there is a pneumatic three-way valve at the outlet of the low-temperature separator, which is regulated by the set temperature of the material fed into Column B. The deethanization effect is poor; it is likely due to the low feed temperature, which prevents the light components from being fully removed. It is recommended to try increasing the temperature entering the tower.
It is recommended to have the design institute conduct a simulation calculation; as long as the components are clear, simulation calculations for such simple systems are quite accurate
The feed rate has decreased, and the light components have also reduced. The operating parameters of the tower should be adjusted accordingly.