The DUCON® Spray Tower Scrubber is a wet gas-cleaning solution designed for quenching/conditioning and efficient capture of coarse particulates (≥ 9–13 μm). It delivers low specific liquid consumption—typically 0.5–8 L per m³ of cleaned gas—and is effective for removing odors, sulfur dioxide (SO₂), phenol, formaldehyde, and other contaminants.
The scrubber consists of a cylindrical tower equipped with spray nozzles/banks for liquid distribution and duct connections for gas inlet and outlet.
Spray banks: One or more stages mounted in the upper section generate droplets of 0.07–1.0 mm.
Contacting regime: Gas flows counter-current to the liquid at typical tower velocities of ~0.6–1.5 m/s. (Higher velocities increase moisture carry-over and may cause dust deposition in outlet ducts.)
Chemical enhancement: Depending on the pollutant, alkaline/acidic or oxidizing reagents are dosed to boost absorption and reaction kinetics.
Materials of construction: 304/316 stainless steel (SS), PP, HDPE, or FRP are selected per process conditions.
Cylindrical tower shell
Gas inlet and outlet connections
Upper/lower spray banks with nozzles
Recirculation pump and piping
Process instrumentation: pH, ORP, conductivity, level, flow
Control valves and bypass arrangements
Mist eliminator (demister)
MCC and PLC control panel
Contaminated gas enters the tower and rises counter-current to finely atomized liquid from the spray banks.
Pollutants transfer to the liquid via absorption and chemical reaction; coarse particles are captured.
Cleaned gas passes through the mist eliminator and exits the system.
The recirculation loop operates continuously; pH/ORP control maintains reagent dosing and liquid quality.
Counter-current, co-current, or cross-flow arrangements
Single- or multi-stage spray banks
Optional quench (pre-cooling) stage
Power and steam generation, chemicals/petrochemicals, steel production, solid/liquid-fired boilers, waste-to-energy/incineration, gas quenching/conditioning, and odor/VOC control.