It’s difficult to control the temperature at the top of the stabilizer – is reflux not effective?
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Under normal conditions, in a stabilizer tower, the pressure at the top of the tower should increase while the temperature there should decrease. The temperature at the top can also be controlled by adjusting the reflux rate. Currently, however, as more reflux is used in this stabilizer tower, the temperature rises to 62°C; the pressure at the top of the tower is around 1 MPa, and the temperature continues to climb. The temperature on the 35th level of the tower is also increasing continuously. How can this be adjusted?
Reduce the bottom temperature when the gasoline vapor pressure is within spec.
This post was last edited by Green Lotus on 2018-11-26 at 16:12. Why isn’t it allowed to be reduced? The heat source for the entire tower comes from the bottom of the tower, and this effect is most noticeable there.
That’s because the non-condensable gas is causing problems; you need to lower the pressure at the top of the tower slightly in order to release that gas! Oh, the pressure of the dry gas outlet device also needs to be reduced a bit at the same time!
The manager doesn’t allow it; the temperature of the reboiler at the bottom automatically becomes 169
The temperature at the bottom of the reactor is also around 120°C. What you’re referring to as a reduction in the pressure at the top of the reactor is achieved through the thermal bypass system; is it that which reduces the pressure? Should I open the valve from the stabilizer top reflux tank to the fuel gas main? Thank you\ud83d\ude1c
As the pressure in the tower increases, in order to maintain the original separation efficiency, the temperature at the top of the tower rises. You can check the temperature after cooling; if it is within normal ranges, it is recommended to open the valve connecting the stabilizer’s top reflux tank to the fuel gas main line in order to reduce the pressure at the top of the tower. To do this, the hot bypass valve should be closed, allowing more gas to condense
If we don’t open the valve that connects the stabilizer tower top reflux tank to the fuel gas network, and instead only close the hot bypass to reduce pressure, would that work as well? By reducing the pressure, the temperature should drop as well. Once the temperature reaches around 58°C, which is the normal level, can we then resume normal reflux operations to control the temperature at the stabilizer tower top? Thank you
It’s not the case that the greater the backflow, the lower the temperature; when the gas-liquid ratio exceeds a certain value, tower flooding occurs! I already answered your question earlier: there is an excessive amount of non-condensable gas in this system (the C1/C2 components). Under these conditions, it cannot be recovered and will accumulate within the system; therefore, it is necessary to reduce the pressure of the dry gas leaving the plant in order to release some of it. ), disrupting your normal operation. Additionally, I suggest that you thoroughly study some basic theoretical concepts; it will be very helpful for you to understand such operations!