Component Splitter

Introduction

The component splitter is used to model special separation unit operations where the details of how the split is accomplished are not relevant.

Model

In dynamics mode, either fixed split fractions or TBP cut points need to be provided. The Distop model can not be used in dynamics.

The compositonal split is determined by either specifying the component splits directly:

Or by providing them indirectly via TBP splits:

Given that the flows and pressures are determined by the pressure flow network, and the composition by the splits, the stream temperatures still need to be determined:

Checking Calculate Equal Temperatures will iterative solve for the outlet temperature such that the overall heat balance is closed. Checking Use Stream Flash Specifications will allow temperature or other flash specifications to be set in the products. Exactly which specifications become available are also determined by the presence or absence of a duty stream and whether its heatflow value is specified or not. The component splitter will generally close the heat balance.

Specifications

Similar to a mixer or a tee, it is recommended that the Equalize Stream Pressures option be checked. This will link the pressures of all attachment together. If this is not done, there will be no link between the stream pressures, in which case they likely need to be specified in all the streams. This view also shows the various stream pressures as well whether the pressure of a given steam is set to be a specification or not.

A volume can be provided to model a first order compositional response.

Because of the way it works, the component splitter can not handle reverse flow meaningfully. In the case of some flow rates reversing, the component splitter will try to do the most reasonable thing, and may temporarily stop updating streams.

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