Chemical scrubbers

Compact, with uncompromising performance

Power station technology for industrial applications

The chemical flue gas scrubbers from Steuler Equipment Engineering represent what is probably the most industry-proven method of removing a diverse array of harmful compounds from exhaust streams and flue gases.

Steuler Equipment Engineering offers a variety of different processes and scrubber designs for the wet chemical removal of a diverse array of harmful compounds, so they can be selected and, if applicable, combined to perfectly meet the project and customer requirements. Wherever possible, wastewater-free processes with reusable end products are preferred.

Wet flue gas desulfurization plants (Wet FGDs)

In situations where chemical wet scrubbers reach their performance limits due to the size of the plant, the so-called limestone-gypsum process is recommended for desulfurizing flue gases. In contrast to traditional chemical scrubbers, the harmful gases are converted into insoluble, filterable calcium sulfate or gypsum. Because of its high purity and quality (euro gypsum), the properties of FGD gypsum are superior to those of natural gypsum and it can generally be sold as a valuable raw material for use in the building materials industry.

Thanks to its industry-leading technical expertise in the field of industrial corrosion protection and the construction of pickling and etching plants, Steuler Equipment Engineering relies on corrosion-free thermoplastics when constructing scrubbers for handling highly aggressive media. Transportable exhaust gas scrubbers with a tower diameter of up to 4 or 5 meters can be prefabricated by Steuler and delivered ready to install.

Larger diameter scrubbers that are too big to transport are generally constructed on site using our innovative, in-house developed reinforced concrete construction method that uses our mechanically anchored Steuler BEKAPLAST lining system on the inside.

Wet chemical scrubbers

Steuler offers highly efficient wet chemical flue gas scrubbing technology for:

  • Production plants in a variety of industrial sectors
  • Small to medium-sized incineration plants (e.g. hazardous waste incinerators)
  • Thermal recycling plants for precious metals, non-ferrous metals, batteries
  • Waste to energy

In addition to various different special designs, we also supply the tried-and-tested standard scrubber designs:

  • Packless scrubbers without packed bed or packing material
  • Packed bed scrubbers with packed bed or packing material from well-known manufacturers
  • Aerosol precipitators
  • Single-stage scrubbers
  • Multi-stage scrubbers with separation system for separating different scrubbing liquids

Depending on pollutant composition and process requirement, the scrubbers are designed to operate using alkaline or acidic scrubbing liquids (chemisorption) or just using water (physisorption).  The scrubbers are designed as single or multi-stage units depending on the required separation rates or local conditions. Through clever process selection and combination, reusable end products are generated wherever possible.

Due to their high performance and the particular way they work, flue gas scrubbers (often combined to make multi-stage scrubbing systems) are especially well suited to treating critical, highly contaminated exhaust streams from hazardous waste incineration plants and thermal processing and recycling plants, such as those used for treating residues containing precious metals, dross incineration plants, calcining plants and hot air roasters. In the hazardous waste incineration sector in particular, the use of acid and alkaline scrubbers with upstream hot gas quenchers has proven to be a more effective alternative to the waste-product-intensive dry systems.

If wastewater accumulation is unavoidable, Steuler can, if desired, design efficient industrial wastewater treatment concepts without giving rise to additional interfacing issues.