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Dürr Megtec wet electrostatic precipitators - RoyOMartin OSB dryer

Wet Electrostatic Precipitator (WESP)

Dürr Megtec wet electrostatic precipitators offer highly efficient control of submicron particulate, heavy metals, acid mists and condensed metal fumes and organics.

Wet ESP Application Areas and Benefits

Our experience includes installations in the wood products and pelletizing industries, regenerative and metallurgical sulfuric acid plants, petroleum refineries, and waste-to-energy applications.

Wet ESPs are a proven polishing filter for reducing sulfuric acid mist, fine particulates, condensed metal fumes and organics, especially where a wet solution is preferred to minimize the capture of condensable particulate.

  • Low operating and maintenance costs
  • Ultra-low particulate emissions (solids, mist and fine particulate)
  • Total system capability for integration with other pollution control devices
Dürr Megtec wet electrostatic precipitator (WESP) – submicron particulate, heavy metals
Dürr Megtec wet electrostatic precipitator (WESP)
Dürr Megtec wet electrostatic precipitator (WESP) – acid mists, fumes, organics

Wet ESP Construction

Materials of Construction
We offer all-steel and all-alloy designs, with materials chosen based on specific applications.

Modular Design
Wet ESP modules are shop-fabricated, allowing for easy transport.

Small Footprint, High Structural Strength
The hexagonal, common-wall tubes provide high structural strength and minimize materials of construction. With a lower overall weight and smaller footprint, our design is more economical to construct and install.

Reliable Rigid Discharge Electrode Design
Our rigid discharge electrode (RDE) design is based on years of research and commercial experience to match the specific application.

Gas Flow Distribution
Perforated plates are used to distribute the flue gas evenly across the collection tubes to maximize performance. We utilize computational fluid dynamics (CFD) and scale modeling to optimize the design and assure uniform flow distribution.

HV Frame
The high-voltage system consists of a rigid frame suspended on insulators. The insulators are located in compartments removed from the flue gas stream, thus avoiding contamination due to wetting and particle deposition.

Low-Maintenance Insulators
High-strength alumina ceramic insulators are mounted in easily accessible compartments. The insulator compartments are designed to keep the insulators warm and dry and away from exposure to the process gas stream and contamination. Typically, insulator compartments are purged with cleaned, dry heated air for this purpose.

Effective Water Usage
The self-forming water film minimizes clean water usage by reducing flushing requirements. Wet ESP effluent can be recirculated to the pre-scrubber or saturation system.

Accurate Voltage and Current Control
Each wet ESP features its own microprocessor-based voltage controller and transformer/rectifier (T/R) set. Complete instrument and diagnostics for voltage and current control is provided.

Wet ESP Pilot Plant
A mobile gas cleaning pilot system is available for on-site performance demonstration and data collection, as is also designed to analyze outlet emissions at various operating conditions. The pilot system includes advanced switch mode power supply (SMPS) technology, variable frequency drive, and fully automated PLC and HMI controls.