Optimized operation of the vapor fraction deethanizer
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Dear sea friends. The carbon trim content in the analysis of the non-condensable gases from the overhead of the vapor fraction deethanizer is very high, at 90%. How can this level be reduced? Other than reducing the temperature, do not close the condensate valve
Is it normal for the C3 level at the top of the tower to reach 70%-80%? ? The large amount of C3 circulating in the system indicates that the separation efficiency of the deethanizer is not high
If non-condensable gas is not vented, the water content in propylene will increase; however, if the requirements regarding water content are not strict and the level of C2 in the feedstock is not high, it is not necessary to vent that much gas.
See http://bbs.hcbbs.com/thread-327620-1-1.html
Adjust the operation of the tower to reduce the temperature of the material at the top of the tower after it passes through the heat exchanger; provide more heat source at the bottom of the tower to enhance the separation effect! Non-condensable gases cannot be condensed. If there is excess non-condensable gas, it can be reduced; the opening degree of the non-condensable gas valve should be adjusted according to the temperature at the top of the tower – when the temperature is low, there is more non-condensable gas