Under normal conditions, no oil output suddenly occurs when reducing to the second stage
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Under normal conditions, oil flow stops suddenly at reduction level 2; the amount of oil at reduction level 3 increases, while there is no change in oil flow at reduction level 1. The reason for this cannot be determined; I would appreciate everyone’s advice!
This issue is quite strange. 1 If the vacuum level drops, changes of minus one, minus two, and minus three should all cause fluctuations. 2 If the flow rate at minus two is high, fluctuations should also occur. 3 Has there been a change in the composition of the crude oil? 4 Has the pump run out of vacuum before recovering again? 5 Could it be that the valve at minus two has failed and caused all the oil to be drawn away? 6 If the flow rate on line minus three increases, does that mean the reflux at minus three has become stronger? 7 Has there been a fluctuation in the temperature of the vacuum furnace? This post was last edited by daiyujin1962 on 2009-2-13 at 13:04
If everything was normal before, then it’s likely that some abnormal situation has occurred – such as damage to the packing in the second pressure reduction line, which has caused blockage at the outlet of that line or at the meter, etc. We have encountered situations where the packing caused blockages in the meters.
It is estimated that a sudden increase in the flow of backflow from line 3 (cold backflow) pushed the oil into line 3. . . Please check this route’s automatic control system, or see if the process bypass was intentionally activated?... Additionally, other factors related to tower operation need to be ruled out, such as whether the temperature of the furnace remains constant. Is the vacuum level always constant? Wait. . . :lol
If adjustment also does not work, it can be determined that there is a leak in the oil collection tank or a blockage at the distillation outlet.
I will not repeat any of the answers mentioned above. One thing to note is that when you find that the outlet pressure of the pump is very high, while the pressures shown on the pressure gauges before and after the flow meter in that section are low, resulting in a pressure difference of several kilograms at the pump’s outlet, then the temperature gradient in the heat exchange process of your installation has been disrupted. This will not only prevent oil from being produced by that line but also cause the installation to operate in a passive mode for an extended period of time
Is the level at minus the second line normal? If there is no liquid level but the indication is correct, then it is possible that the oil collection tank is leaking.