The purpose of these systems is to reduce oil carryover in compressed gases to any specified level down to
1 PPBW.

PROCESS DESCRIPTION

Oil is present in the compressed gases downstream of oil-flooded screw or lubricated reciprocating compressors. To remove this oil and reduce the contents to finite levels is possible only by the use of successive stages of coalescing oil separators followed by charcoal adsorber. Typically for 10ppbw or less oil carry-over limit, three stages of coalescing, followed by a charcoal adsorber is required. Coalescing separators remove the oil droplets; whereas the charcoal adsorbers remove the vapor phase oil. 2 Micron Filters are employed downstream of adsorbers to catch particulates from the charcoal.

Benefits

• Oil-free compressed gas is available from versatile oil-flooded screw compressors or longer life lubricated recip. Compressors when an “ORS: is employed downstream of the compressors.
• An ORS will permit the use of higher compression ratios per stage of compression when an oil-flooded or lubricated compressor is used instead of a dry or an oil-free compressor.

Applications (partial list)

• PSA Feed Gas Compressors of oil-flooded screw or lubricated Recip. type
• PSA Product Gas Compressors of oil-flooded screw or lubricated Recip. type
• H2, N2, Nat. Gas, CO2 Compressors of oil-flooded screw or lubricated Recip. Type
• CO2 Liquefaction Plants
• Oil-Flooded Helium Compressors upstream of cold-boxes

Options

• Single particulate filter with a by-pass or duplex particulate filters.
• Double block and bleed isolation valves or single isolation and spectacle blinds
• Choice of Carbon Steel or Stainless Steel material of constructions
• Any design pressures (150, 300, 600, 900, 1500 or higher)