Process columns for petroleum refining, chemical separation and gas purification: distillation, absorption, desorption and extraction towers — including deethanizers, depropanizers and crude oil stabilizers supplied to CNOOC offshore projects.

Working Principle

Efficient mass and heat transfer between gas–liquid or liquid–liquid phases across trays and packing delivers the separation duty at the heart of every refinery and gas plant.

1. Feed enters the column at the design tray; vapour and liquid flow counter-currently.
2. Trays or structured packing multiply the phase-contact area.
3. Products draw off at defined purities: overhead, side-cuts and bottoms.

Application Scenarios

• Petrochemical: atmospheric/vacuum crude distillation, FCC fractionation, ethylene-plant demethanizer/deethanizer service.
• Fine chemicals: solvent recovery, intermediate purification, neutralisation.
• Environmental: flue-gas absorption towers, wastewater ammonia stripping.
• New energy: battery-electrolyte solvent refining, polysilicon tail-gas recovery.

Product Advantages

Product Range

Deethanizer / depropanizer columnsCrude oil stabilizer columnsAbsorption / stripping towersProduced-water stripping towers (CCUS service)

Frequently Asked Questions

Have CGOT columns been used offshore?

Yes — deethanizer, depropanizer and crude-oil stabilizer columns were supplied for the CNOOC Wushi 17-2/23-5 offshore oilfield joint development project.