Breakthrough Technology Replaces Conventional Scrubbers and Wet ESPs

The VenturiPak scrubber is a result of re-examining and optimizing the venturi concept to achieve high collection efficiency at modest energy consumption (i.e. low to medium pressure drop).
The fine particulate fraction in furnace stack off-gases is comprised of fine solid particles (< 1 micron), and condensed solid and liquid aerosols resulting from the cooling and sub-cooling in the scrubber. These fine particles are problematic in that:

• They are the most optically active, so that even in low concentration, they affect stack opacity.
• They may contain significant concentrations of heavy metals.
• They are most difficult to capture, requiring very high energy for conventional venturi scrubber systems or the addition of a Wet Electrostatic Precipitator (WESP).

The EnviroCare VenturiPak places the scrubber components in proper sequence rather than the traditional practice of placing a high energy venturi directly following the quench section. The VenturiPak scrubber incorporates the latest technological advances in wet scrubbing and atomization technologies. Features of the system include:

• A quench section with an effective spray system and a low energy (2-5" ∆p) venturi to capture over 90% of the particulate.
• Sub cooling following the quench converts any condensables into particulate and "grows" the heavy metal particulate, both usually sub micron, for subsequent capture in the venturi stage.
• Water atomization with a MicroMist(TM) nozzle at the entrance of each venturi.
• Water controller to compensate for variations in gas flow volume.
• Utilization of multiple "near true" venturi tubes to maximize energy recovery.

Each component is designed for durability and is integrated into a state-of-the-art air pollution control system.
The VenturiPak scrubber performance has been verified through test results on small (±1000 ACFM), medium (±10,000 ACFM) and large (65,000 ACFM) installations. The system, with a local controller, is designed to provide high removal efficiencies over a wide range of gas volumes. It is also designed to remove pollutants not included in the 503 regulations, such as condensables, acid gases, soot, and hydrocarbons.