Distillation column operation
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This post was last edited by lxzzl on 2009-5-27 10:42. During the production process, the pressure difference of the distillation tower remains unchanged, but the tower top pressure and tower still pressure continue to increase. What is the reason for this? How to solve it?
This post was last edited by lxzzl on 2009-5-27 10:42. It may be that the design of the outlet pipelines at the top and bottom of the tower is too small, causing pipe obstruction and the tower pressure cannot be released. It may also be that the back pressure at the outlet of the tower is high and the back path is not smooth, causing the pressure to continue to rise.
This post was last edited by lxzzl on 2009-5-27 10:43. Whether the reboiler is leaking or flooded, first check whether the temperature of the distillation tower has changed, and then determine whether there is pressure in the system.
This post was last edited by lxzzl on 2009-5-27 10:44. It should be liquid, right? Has the liquid phase load been exceeded? Are the operating parameters unstable?
This post was last edited by lxzzl on 2009-5-27 10:44. It may be caused by the gas phase outlet pressure at the top condenser and reflux tank. The pressure at the top and bottom of the tower increases at the same time, but the pressure difference remains unchanged.
This post was last edited by lxzzl at 2009-5-27 10:45. Thank you for your discussion. Is it possible that the components have changed? What is the reason for the increase in high boiling point components?
This post was last edited by lxzzl on 2009-5-27 10:46 It is possible that the steam volume in your tower kettle has increased, the material balance and energy balance in the tower have changed, the steam V has become larger, the heavy components at the top of the tower have increased, and the pressure has increased.
I suggest you check it out as my friend mentioned above.
I have also encountered this situation, but it was a small test in the laboratory. Generally, it is the result of liquid flooding. Lower the heating temperature, and then increase the heating again after the tower comes back down to stabilize it.
According to your statement, the pressure of the entire tower is rising. This may be due to the use of too much steam.； It is also possible that the reflux is added too much, causing the pressure in the tower kettle to rise, thereby driving the pressure and temperature of the entire tower to rise while keeping the pressure difference unchanged or changing very little. ； Another possibility is that there is a problem with the venting regulating valve, resulting in poor pressure relief (our factory has encountered this)
Possible reasons: 1. The outlet pipe diameter area at the top of the tower is not enough. ； 2. The tower top condenser is under pressure