Debutanizing column sensitivity plate temperature
Thread Content
Regarding the reason for the low temperature of the sensitive plate in the butane removal tower, which of the following options is incorrect? A: Low tower pressure B: Low pressure of the heating steam C: Too low temperature of the heating steam D: Low liquid level in the tower bottom. The answer is A. Could experts explain why this is the case?
The factor that affects the temperature of the sensitive plate is BCD. A low tower pressure is related to the operation conditions of the sensitive plate, but it does not affect its temperature; rather, the level of tower pressure is related to the light components!
I have a question: with all other conditions remaining unchanged, if the tower pressure decreases, shouldn’t the temperature of the sensitive plate also decrease?
This is not a direct influencing factor; a low tower pressure does not necessarily mean that the temperature of the sensitive plate is low – it could be due to a high refrigerant load on the top condenser or to a composition of the feed that is too rich. The BCD option represents the direct cause of the low temperature of the sensitive plate!
Well, please forgive me for not asking clearly – it makes sense that when the tower is lowered, the temperature of the sensor board also decreases. However, a low liquid level in the tower bottom results in a low temperature of the sensitive plate. What is the principle behind this? ?
The liquid level in the bottom of the tower affects the heat exchange area of the heat exchanger, which in turn has a direct impact on the heating efficiency of the reboiler in the tower. Therefore, either too high or too low a liquid level in the tower leads to poor heat exchange, resulting in a lower temperature of the sensitive plate; heat exchange takes place based on the principle of thermosiphon action!