Why does the pressure of the debenzene tower increase after the crude benzene regenerator is refueled?
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After the regenerator is refueled, the pressure at the bottom of the benzene removal tower increases, while the pressure at the top and middle of the tower is normal.； The pressure at the bottom of the tower is normal after stopping refueling. Could you tell me the reason?
This post was last edited by me Niu on 2009-10-21 09:23 Generally, the amount of superheated steam entering the benzene removal tower is unstable, causing the pressure at the bottom of the benzene removal tower to rise. The water in the system causes the pressure at the bottom of the benzene removal tower to rise. I haven’t heard of the reason you mentioned.
After refueling the regenerator, did you also increase the superheated steam?
I don’t know if when you say refueling the regenerator, you mean adding washing oil. When adding washing oil here, the pressure of the regenerator will rise, causing the regenerator safety valve to open! Later, it was found that the washing oil contained water. When a large amount of washing oil was added, the water suddenly evaporated, causing the regenerator pressure to increase to the point where the safety valve was opened! After that, when we add the washing oil, we will slow down the adding speed, reduce the amount of superheated steam, and drain the washing oil more!
Basically agree, control the amount of steam.
Is it lean oil regeneration or oil rich regeneration? It's possible that the heat exchanger is leaking.
I agree with the observation on the fourth floor that the washing oil contains water, and the amount added at one time should not be too large.
It may be that the high temperature control of the regenerator causes the heavy components in the wash oil to be evaporated and increase the amount of oil and gas, thereby increasing the pressure at the bottom of the tower. Do an analysis of the wash oil quality and compare the regeneration effect. If there is water in the oil wash, it is easy to find, such as vibration in the oil wash pipe.
After the regenerator is refueled, the pressure at the bottom of the benzene removal tower increases, while the pressure at the top and middle of the tower is normal.； After stopping the refueling, the pressure at the bottom of the tower is normal. Whether it is the regenerator or the benzene removal tower, both are distilled. You can start from the three major balances of distillation: 1. Gas-liquid balance 2. Heat balance 3. Material balance. As for the specific reasons, the poster can be more specific. For example, after the tower pressure increases, how does your crude benzene output change, how does the quality change, and the amount of lean oil, how is the distillation range of lean oil compared with before, etc. Specific analysis
Control the regenerator liquid level, the amount and temperature of superheated steam after exiting the tube furnace
It should be that the new oil added contains water. After adding the oil, you can control the temperature at the bottom of the debenzene tower to be higher and open it for dispersion and dehydration. The debenzene removal can be completed in one hour.