Pressure and bottom temperature of the low-pressure drum in a urea plant using carbon dioxide stripping
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In a urea plant using the carbon dioxide stripping method, can the pressure in the low-pressure drum and the temperature at its bottom be correlated with the corresponding saturated steam pressure and temperature?
No match found; the temperature is higher than that in the table
High-pressure steam: 1.7 MPa at 207 degrees; low-pressure steam: 0.6 MPa at 166 degrees
This post was last edited by WJHSWSW on 2015-11-4 at 19:44; under normal conditions, it is about 10°C higher than the corresponding saturated vapor pressure! ! ! ! ! ! ! ! ! It works on the same principle as a kettle used to boil water – the temperature at the bottom of the boiling pot is higher than that at the top. So how is liquid convection generated?
It should be basically the same; the temperature at the bottom of our low-pressure steam drum sometimes falls below the saturation temperature of water vapor at that pressure, and the main reason for this is the effect of liquid addition to the drum.