Liquid/Gas Coalescer

Pall Solutions

A Pall SepraSol™ Liquid/Gas coalescer in the gas feed line will remove virtually all of the entrained liquids in the feed gas. This eliminates the problem of hydrocarbons and amines mixing with the glycol, minimizing any problems with foaming.
Pall disposable filters are recommended on the recirculating glycol stream to remove iron oxide particulates. Since the glycol is a circulating system, the solids concentration will gradually increase unless removed by a filter. The high solids result in equipment fouling and stabilize foaming. The circulating glycol should contain less than 1ppm by weight of suspended solids and should be filtered to an efficiency of 10 µm absolute. This circulating glycol system often requires that coarser filters be installed at first to clean the system of solids which have been accumulating over a period of time. Progressively finer filters are introduced to the system until a filter efficiency of 10 µm absolute is obtained.
 Figure 1. Glycol Dehydration System
Table 1. Filter Recommendations
Filter LocationRecommended Pall AssemblyPurpose
of Filtration		Benefits
of Filtration
1Pall SepraSol Liquid/Gas
Coalescer:
CC3LG7A
CC3LGO2-H13
CS604LGH13		Removes water, hydrocarbon, carried over amines and other liquids and solids from gas feed

  • Reduces foaming problems




  • Increases absorber efficiency




  • Prevents exchanger and reboiler fouling



    • 2Pall Profile® II or
    Ultipleat® High Flow cartridge: 10 µm    		Removes scale, solid particles

  • Reduces foaming problems




  • Reduces glycol losses




  • Increases energy efficiency




  • Increases absorber efficiency




  • Prevents exchanger and reboiler fouling



    • 3Pall SepraSol Liquid/Gas Coalescer:
    CC3LG7A
    CC3LGO2-H13
    CS604LGH13    		Removes water, carried over glycol, and liquid hydrocarbon

  • Protects downstream processes




  • Reduces downstream equipment maintenance costs

























    • If glycol losses are significant due to operating at higher than design capacity, Pall’s SepraSol Liquid/Gas coalescers can be installed downstream of the contactor overheads to recover glycol and protect downstream equipment like compressors, desiccant beds and heat transfer equipment.
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