I’d like to learn about the purification at the top of a fractionation tower*; are there any experts who can explain it? From the isobutane removal tower: the pressure is 0.59 kilograms; the maximum reflux temperature is 123°C. Over a period of four days, the purity of isobutane at the tower top was 66%, while that of n-butane was around 28%. The feed rate was 122
Thread Content
I’d like to learn about the purification at the top of a fractionation tower*; are there any experts who can explain it? From the isobutane removal tower: the pressure is 0.59 kilograms; the maximum reflux temperature is 123°C. Over a period of four days, the purity of isobutane at the tower top was 66%, while that of n-butane was around 28%. The feed rate was 122, which corresponds to the full scale value. Please provide a solution
I’m not in this field, but the underlying principle is the same. At the initial stage of putting a production system into operation and establishing operating conditions, this is done gradually: one fluid involved in distillation is used as a reference, while another fluid is used for adjustment; first the resistance is adjusted, and then the purity is adjusted. In the case of these two fluids, the one that rises is gas, while the one that flows downward is liquid. If temperature is used as a reference, then a fluid that can influence this temperature regulation must be chosen as the regulating substance. If loss of control occurs during adjustment, it is necessary to check whether the readings on the instruments match the actual opening degree of the valves, and whether there is a risk of material in the tower blocking it. (For reference)
Too little information is provided. At the beginning of distillation startup, full reflux is required for an extended period until the product meets the specifications; thereafter, the feed and output are gradually increased