Internal reflux splitter

These different types of internal reflux splitters have to be chosen depending on the specific retrofit case, based on their features listed in Table 9.1. 

Figure 9.7 Various internal reflux splitters (a) moving-bucket type, (b) manual type and (c) in-the-column type.

One important device in a DWC is an internal reflux splitter to manipulate the split of the liquid coming from the coluum overhead into the dividing wall section. A moving-bucket-type splitter was designed and fabricated to provide a precise split adjustment. Because of the potential risks from restless movement of its mechanical parts, it was replaced with a manual-type reflux splitter in the next turnaround period. 

A reflux splitter can be installed with an external gravity-reflux system (Fig. 19.56), an internal condenser system (Fig. 19.5c), and a pumped reflux system (Fig. 19.5ci). Venting near the top of the reflux splitter is important if vacuum creation is undesirable (130) or when noncondensables may be present. Figure 19.5a shows a vented reflux splitter construction (130). 

---