Process Flowsheet

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Figure 2-7 is an enlargement of the FWKO of Figure 2-1 to show the amount of detail that would be expected on a process flowsheet. A flash calculation is needed to determine the amount of gas and liquid that each separator must handle.

In the example process of Figure 2-1, the treater is not considered a separate stage of separation as it operates very close to the FWKO pressure, which is the last stage. Very little gas will flash between the two vessels. In most instances, this gas will be used for fuel or vented and not

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compressed for sales, although a small compressor could be added to boost this gas to the main compressor suction pressure.

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