How do you design a reflux condensor? The reaction inside the reactor is happening under nitrogen blanketing. In what way can you know how much nitrogen and how much of the product will go to the condensor? In a calculation of a reflux condensor I also saw the term "non-condensable." How can you know how much of the off-gas is non-condensable?
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Jim Grant Forum Moderator 114 Posts
Re: Redesigning a reflux condensor19 September 2006 at 1:29pmNitrogen blanketing implies a constant pressure system in which only enough nitrogen is added to maintain the vessel pressure. If the partial pressure of all volatile materials in the reactor sums to less than the control pressure, then the remaining partial pressure is N2. This composition should be used at the entrance to the reflux condenser. All non-condensables will be those vapors/gasses which will not condense at the discharge temperature of the reflux condenser. A flash calculation must be done to determine vapor and liquid phases at the entrance and exit of the unit. For reflux condensors, it is best to utilize a differential flash rather than an integral flash. If possible, simulate the entire reactor utilizing either equilibrium or kinetic reaction constants and henrys law data for nitrogen solubility.