The Gold Standard...for Demanding Applications

Using technology pioneered by Verantis, the IWS Ionizing Wet Scrubber has been
at work for over 35 years and can be found in more than 500 installations worldwide.

The Ionizing Wet Scrubber or "IWS™" is a patented Verantis design developed for simultaneous removal of gases and particulate with opacity reduction. The unit combines the particle removal capabilities of an electrostatic precipitator with the effective gas removal of a crossflow scrubber in a compact, modular design. Contaminated gases pass through a horizontal charging section prior to entering a packed section containing Tellerette® Packing.

The particulate is then charged and collected on both the ionizer plates and the packing via common electrostatic principles and "image force" attraction. Gases are also absorbed and neutralized in the packed section. The crossflow configuration allows the use of multiple stages where very high efficiency of submicron particulate is required. The IWS can meet the most stringent MACT requirements for removal of particulate and heavy metals and has been tested to outlet loadings below 0.001 gr/DSCF. The IWS can be easily retrofitted to existing equipment trains to meet new regulatory requirements. Pilot Testing Equipment is also available for new applications.

Verantis Scrubber Technology :

Both the IWS and CeilClean IPS are based on a proven means for the removal of pollutants from industrial process gas streams. The IWS and IPS combine the established principles of electrostatic particle charging, image force attraction, inertial impaction, and gas absorption to collect submicron solid particles, liquid particles and noxious and malodorous gases simultaneously. These systems require minimal energy, and
collection efficiency is high for both submicron and micron size particles.

Features & Benefits:

• Fractional Collector - The IWS system acts as a fractional collector. The percentage of particulate removed varies little with load and particle size distribution over a wide range. As particulate load increases, the percentage
  removed remains nearly constant. The collection efficiency for fine particles
  is nearly as great as for coarse particles.
• Turn Down - Collection efficiency improves with turn down from 100% to 0% load.
  
• Size Range - Factory assembled modules are available in standard capacities from 500 to 50,000 ACFM, and can also be grouped together to clean virtually any gas volume.
  
• Low Energy Consumption - High efficiency ionization combined with high-throughput Tellerette® packing results in lower energy usage with typical pressure drops at 0.5 to 1.5 inches WC per stage.
  
• Horizontal Configuration - Can be configured in multiple stages to
  increase collection efficiencies.
  
• Track Record - At work around the world for over 35 years in
  more than 500 of industry's most demanding applications.
• Proven Performance - performance to less than < 0.001 gr/DSCF and "Zero Opacity"

 

• The IWS Process
• Tellerettes® & Tower Packing
• Image Force Attraction
• Markets & Applications

How IWS Scrubbers Work

Verantis' IWS™ and IPS™ scrubbers use high voltage ionization to electrostatically charge particulate in the gas stream before the particles enter a Tellerette® packed scrubber section where they are removed by attraction of the charged particles to neutral surfaces.

Patented Technology with Tellerettes®

Tellerette® Packing has a unique patented toroidal helix design that makes them dramatically more efficient than conventional packing for mass transfer, heat transfer and particulate collection.


Benefits include:

• Greater gas flow capacity permits use of smaller diameter,
  lower cost columns.
• Existing towers can be retrofitted for higher capacity
  and improved efficiency.
• Lower pressure drop for reduced operating costs.
• Minimal fouling because of high open area.
• Effective impingement of both liquid droplets
  and solid particulate.
• Available in a wide range of materials including
  polypropylene, polyethylene, PVC, PVDF, and Tefzel.

 

Visit Our Tellerette® Page.

Induced Surface Charge

The predominant influence acting within the CeilClean IPS and IWS to collect submicron size particulate is the mechanism of impingement of electrons on particulate "Image Force Attraction."

Image force attraction occurs whenever an electrostatically charged particle comes within the boundary layer (usually within one millimeter) of a neutral surface. As the charged particle comes close to the neutral surface, an electrostatic charge of opposite polarity is induced at the neutral surface.

The force of attraction is similar to that which would exist between a charged particle and an imaginary particle of equal but opposite polarity located at an equal distance behind the surface. It is as though the charged particle was seeing its "mirror image."

Typical Markets & Applications: IWS System and CeilClean IPS.

Metal Refining and Recovery - Metal oxides, metal salts and acid gases

Incineration - Hazardous waste, chemical or pathological heavy metals, HCl, HF

Boiler Exhaust - Ash, metals, HCl, SO2

Semiconductor - NH4Cl fume from cross-ventilation

Diesel Engine Exhaust - Ash, SO2

Fiber-Optic and Specialty Glass Production - HCl, Cl2, SiO2, GeO2

Pulp, Paper, Wood Processing - Ammonium bisulfite fumes, dust, condensable organics

Other processes requiring removal of submicron particulate

Visit Our Markets Page.