The shape of the bottom of this tower is so strange
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This post was last edited by 一一123 on 2017-2-23 15:16 As shown in the picture, the bottom of the tower looks like an oil-water separation bag, but it doesn’t look like it at a closer look, because the thin one only has one outlet, and the return flow comes in from that one. Have you ever seen such a tower? What is its role? This is a PS that appears in petrochemical projects: Many people have suggested that this can reduce the residence time. How to reduce it? Secondly, the temperature of the vacuum tower kettle should be lower than that of normal pressure. Why is this method not used for normal pressure?
With this design of the decompression tower, the oil at the bottom of the tower is heavier, which reduces the residence time and prevents coking.
For the first time, I know why the pressure reduction tower is designed like this.
Is there a reboiler used at the bottom of the vacuum tower? No need to strip steam?
A design of the pressure reduction tower to prevent heavy oil from coking.
I know that the vacuum tower for crude oil distillation does not use a reboiler, but uses a heating furnace for heating.； Some stripping steam is used (wet type) and some are not used (dry type). Not using it is good for the vacuum degree.
Is there anything strange about it? Asphalt decompression towers are not all thin at the top and thick in the middle!
Prevent evaporation to dryness and always fill the liquid phase!
There is nothing strange about this. Special equipment is common in the chemical industry. It is mainly a special setting optimized based on the control of physical properties, discharge amount, reflux part, discharge temperature, etc. The main thing is that you have to understand what the process is, what is the purpose, and what is the purpose of this design. Please forgive me if I am wrong about my own understanding.
Why can this reduce the stay time? ? The pipe diameter becomes smaller and the flow rate becomes lumpy?