Type 62-CC-2S

Liquid-Liquid Coalescer Separators

The Type 62-CC-2S Liquid-Liquid Coalescer Separator employs both coalescer and separator cartridges for effective separation of two immiscible liquids such as water from a hydrocarbon.  Liquid-liquid coalescers have applications in refining, oil & gas, and related industries.

In the liquid-liquid coalescer separator, hydrocarbon liquid (continuous phase) mixed with small amounts of aqueous liquid (discontinuous phase) passes through two types of cartridges for effective liquid separation.  

Applications include separation of:

• Trace amounts of water from gasoline and kerosene
• Caustic from fuels
• Water from oil and naphtha
• Other immiscible liquids with dissimilar densities

The WCTL6--R Series first stage coalescing cartridges coalesce dispersed water droplets until they are large enough for most to settle to the bottom of the vessel by gravity.  Ultra-fine solids are captured in these cartridges and are removed with the cartridge change-outs. The liquid flow moves through each coalescing cartridge from inside to outside, and therefore less surface area is available with which to retain solids.  If heavy particulate loading is expected, a filtration unit such as a Type 61 Liquid Filter should be installed upstream of the liquid liquid Coalescer Separator so as to maintain peak efficiency of the coalescer cartridges and extend the time between cartridge change-outs.

The WCTL6--PC Series second stage separator cartridges separate any remaining water droplets from the continuous phase liquid flow.  The treated cellulose pleated cartridge media is hydrophobic, allowing oil to pass through while repelling water. 

Liquid-Liquid Phase Coalescer and Separator Cartridges:

1^st Stage Coalescer Cartridge, WCTL6--R Series:

• Fiberglass media
• Flow direction is inside to out
• Effluent remnant: 10 ppm
• pH range: 5 – 9

2^nd Stage Separator Cartridge, WCTL6--PC Series:

• Pleated silicone treated cellulose media
• Flow direction is outside to in
• pH range: 5 – 9

How the Liquid-Liquid Coalescer Separator works:  As the liquid emulsion flows through the first stage coalescing cartridge media from inside to outside, dispersed water droplets attach to the media fibers.  As the flow continues, additional water droplets attach to the fibers and merge, or coalesce, with other droplets.  This coalescing process continues until the droplets have grown large enough to release from the media and exit the cartridges into the vessel interior.  With a higher specific gravity, and thus a greater density than the hydrocarbon liquid, most of the water droplets fall to the bottom of the vessel by gravity and are collected in the vessel’s boot, or collection chamber.  Any remaining small droplets that do not have the mass to fall out at this stage are removed by the second stage hydrophobic separator cartridges.

The Liquid-Liquid Coalescer Separator is available in horizontal and vertical configurations.