I need help with a few questions regarding pre-hydrogenation!
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1. Pre-hydrogenation involves converting organic chlorines into inorganic chlorines, which are then removed in a high-temperature dechlorination tank. That seems correct, right? May I ask what those inorganic chlorines are? 2. The components of the overhead oil tower should be predominantly C5; apart from C5, what other components are there? 3. The role of the adders for feedback and extraction! It’s best to give an example! Thank you all!
Try to answer; discussions are welcome. 1. Inocyclic chlorine in pre-hydrogenation probably refers to HCl； 2. The components of degreasing oil are mostly C5; of course, there are also some C2, C3, C4, and C6 components ； 3. I’m not quite sure about this adder. Literally speaking, it seems to be used to keep the sum of the reflux volume and the output volume relatively stable, thereby ensuring stability in the liquid level of the reflux tank and preventing large fluctuations. I’m not sure if that’s correct.
2nd floor is correct； The third question regarding the adder is related to situations where the reflux ratio is significantly high. In such cases, using reflux control to adjust the liquid level in the reflux tank can affect the effectiveness of control; moreover, when there are large changes in the cooling load at the top of the tower (such as during heavy rain), it is more appropriate to use reflux to adjust the liquid level.
I asked around today, and **the basics are as follows: 1. Inorganic chlorine refers to all chlorides, which certainly includes HCl. 2. The components of the degassing tower are basically the same as those mentioned on the second floor; they mainly consist of C5, compounds with lower molecular weights than C5, and a small amount of C6 as well!** The most important thing is that there is still a lot of hydrogen sulfide in this degumming tower! The function of the degassing tower is to remove hydrogen sulfide! 3 adders; what was said on the 2nd floor is mostly correct – it’s just the addition of the feedback and the newly generated values! When the sum is constant, the tower remains stable. For example, if the temperature of the sensitive plate at the top of the tower is high, the extraction rate decreases. Since the sum remains fixed, the reflux rate increases accordingly, which in turn lowers the temperature at the top of the tower! At low temperatures, everything is the opposite! When the liquid level drops, the reflux decreases; as the top temperature of the tower rises, the yield decreases, and thus the liquid level in the reflux tank increases! I think that’s more or less what it means! Everyone is welcome to discuss and offer corrections! ! !