Definition - What does Coalescer mean?

Coalescer is a type of industrial equipment used in the oil and gas industry to perform coalescing. Coalescing is one of the separation technologies performed by Coalescer for liquid-liquid separation and liquid-gas separation from the hydrocarbons. In this technology, the small particles or droplets of hydrocarbons are coalesced into larger ones with the help of baffles or electrical current.

Petropedia explains Coalescer

A Coalescer is widely used in the oil and gas industry. There are two types of Coalescers used in the industry:

  • Mechanical Coalescer – These types of Coalescers are used to remove water or hydrocarbon condensate by using filters or baffles to make small particles into larger ones. These filters or barriers are arranged in series so that small droplets that move from these barriers can be collected when passing from each barrier. Water droplets are intercepted to the barriers whereas the oil gets thinned by the fibers of the baffles passed through them, thereby separating water from oil.

  • Electrostatic Coalescer – Such type of Coalescers make use of weak electric charges to attract water molecules to the surface of the collection tank of the Coalescer. The electrostatic force helps in breaking water oil emulsions and gradually increases the size of water droplet which settles down at the bottom. These type of Coalescers are widely used in offshore production facilities.

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