Environmental

Scrubbers

A.H. Lundberg Systems provides a diverse range of gas scrubbing technologies to effectively, dependably and economically address air pollution issues.

Venturi Scrubbers

Each A.H. Lundberg Systems venture scrubber is individually designed to efficiently collect fine particulate and aerosols from industrial process waste gas streams.

The scrubber design incorporates a downflow venturi with a fixed or variable throat, a wet-bottom elbow, and an upflow entrainment separator. The collection principle of the scrubber uses the differential velocity between the waste gas and injected water (or other scrubbing liquid) to create droplets which entrap particulate mater in suspension. Upstream injection of the scrubbing liquid may also serve to quench hot vapours, if required. The particulate may then be extracted as a slurry for recovery or disposal.

Optimal design will require knowledge of the desired collection efficiency, gas and particle densities, particle size distribution, allowable pressure drop, and space restrictions.

Packed Tower Scrubbers

A.H. Lundberg Systems packed bed scrubbers are designed to absorb odours, VOCs, hydrocarbons, acid mists, and various organic and/or inorganic contaminants from a process gas stream.

Pollutant laden gas enters the tower near the bottom and flows upward through a bed of mass transfer media. Absorption liquid (liquor), selected as appropriate to the process, is distributed evenly on top of the packed bed by a spray header arrangement. The intimate contact between the liquor and the gas flow results in absorption of the pollutants into the liquor as the gas flows upward through the media bed. The media is selected to provide optimum wetted surface area in contact with the gas flow and may be of ceramic, metal, or plastic.

Spray Tower Scrubbers

The A.H. Lundberg Systems spray tower scrubber is used for gas flows requiring both particulate removal and gas absorption, where particulates may be formed, or where the re-circulated scrubbing liquid is an emulsion containing suspended solids. Hot gas quenching and vapour condensing may also be included in the system, if necessary.

Gas flows upward through multiple spray zones of scrubbing liquid (liquor), to give intimate contact between the liquor and the gas flow, ensuring absorption of the pollutants into the liquor.