Mercury Removal Unit

Mercury (Hg) exists naturally in oil and gas reservoirs and in gas streams in element or as compound form. The presence of mercury may not be tolerated in certain types of process equipment. Mercury causes severe hazardous corrosion (liquid-metal embrittlement) of aluminum heat exchangers in cryogenic plants, pipes, fittings, and control valves containing non-ferrous metals by amalgam formation. Also, mercury is toxic can easily dissolve in aqueous streams or produced water streams and poison catalysts at the downstream equipment.

Process Description

Mercury removal is a three-stage process. The first stage comprises of natural gas flowing into the inlet gas coalescer for bulk removal of liquid followed by fine removal of liquid in the coalescing section. Liquid droplets of sizes more than 0.3µm are removed to ensure dry gas flows into the mercury removal bed. This is vital for the long life of the bed media.

In the second stage, this liquid-free gas flows into the mercury removal unit, where the elemental mercury is absorbed by proprietary media absorbent (mixed metal sulfides). In the third stage the mercury-free gas is taken to an After Filter to remove any solid dust carried over from the mercury removal bed unit.

CECO Peerless Offer:

• Absolute Separator with High Performance Internals for 99.99% removal of liquid droplets of sizes > 0.3 µm
• Mercury Removal unit
• Post-Bed Dust Filters with long design life and efficiency to remove 100% of particles up to 3 micron
• Optional offer for complete package including Piping, E&I and Structural skid