I have a very simple question regarding atmospheric and vacuum distillation
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I would appreciate it if experts could explain: the changes in the pressure at the top of the initial distillation tower caused by the high water content in the crude oil after desalination, as well as their impact on the amount of distillate at the tower top and the dry point of the product, are of a different nature from normal variations in tower top pressure, and the resulting effects are also entirely opposite. First, is this sentence correct? Second, what is the reason?
Yes. The reason for the change in top pressure caused by water in crude oil is the increase in water vapor partial pressure; the general change in top pressure, on the other hand, is due to changes in the partial pressure of oil and gas.
Yes, as the temperature and enthalpy of water vapor increase, the dry point of the product rises as well. It is mainly due to the increase in the partial pressure of water vapor.
I’m not involved in atmospheric and vacuum distillation, but the composition of the feed to a distillation column can affect the operating pressure and temperature of the column, as the total pressure is determined by the various components present.
What was said on floors 2.3 is correct; a high moisture content leads to an increase in the pressure at the top of the tower, and this works differently from normal pressure fluctuations.
The changes in the top pressure of the initial distillation column caused by the high water content in the crude oil after desalination are primarily due to the vapor pressure of water. As a result, the quality of the material coming out of the column top is often not satisfactory, representing ineffective components within the product; the amount of product distilled is also greatly affected. In contrast, changes in the top pressure only lead to variations in the effective components of the product, so the consequences are completely different
The pressure fluctuations caused by high water content in crude oil inevitably lead to an increase in the dry point of the product at the top of the tower. This is a natural consequence of a decrease in the vapor pressure of hydrocarbons and a sudden rise in the heavier components; this phenomenon is referred to as \"tower flooding\" in operational terms, and it represents an abnormal condition. An increase in the normal tower top pressure is due to an increase in the vapor pressure of oil and gas; as a result, the dry point of the product at the tower top tends to decrease, and the amount of distillate produced decreases. This is a normal method for adjusting product quality.
Thank you, I understand. On the surface, the pressure has increased, but in reality the air pressure for oil and gas has decreased!
I’ve learned a lot from all of you. I haven’t been working in the chemical industry for long, so I’ll come and learn more in the future*