4.9. Flare knock-out drums
Flare knock-out (KO) drums are one type of gas–liquid separators that are used specifically for separation of liquids carried with gas streams flowing to the flares in OGP plants.
The main difference between flare KO drums and other conventional gas/liquid separators lies in the size of the droplets to be separated; i.e. separation of 300, 600 μm droplets fulfills the requirements of flare gas disengagement. Therefore usage of mist eliminating device is not usually necessary in flare KO drums, except for cases where the results of calculations lead to an abnormally large drum size. In such cases, application of vane-type or multicyclone separators may help avoid employing an extremely large drum.
Table 4.4
Values of C
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