Free Water Knockout (FWKO) Vessels are horizontal or vertical vessels designed to separate liquids of different densities (typically oil and water). They can only be used on streams where the fluids exits separately and not as emulsion. FWKO vessels are used in conjunction with other equipment in order to achieve desired results. The degree of separation achieved depends on

Retention time

Density differential of fluid

Temperature of flowing fluids

Knockout drums are provided in situations where liquid separation is likely in the waste stream. The knockout drum will collect any liquids that are present in the waste stream prior to entering the flare system. A knockout drum is especially important if substantial cooling of heavy liquids is expected. If the liquid is corrosive, MRW uses non-corrosive materials of construction. A level gauge and drain connections are built into the knockout drum.