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Pollution Prevention and Control Technologies for Plating Operations


Section 3 - Chemical Recovery

3.8 MESHPAD MIST ELIMINATORS

3.8.3 Applications and Restrictions

Unlike scrubbers, which are typically installed to serve multiple tanks or processes, meshpad mist eliminators are usually dedicated to individual tanks. Exhibit 3-66 (27 kb) shows a plan view of a hard chrome line where meshpad units are incorporated into the exhaust systems for plating and stripping.

Meshpad mist eliminators can be installed during new plating line installation or as a retrofit to an existing line. With retrofit installations, it is best to include new exhaust fans and ductwork along with the mist eliminators. This ensures proper air pressures and velocities, and allows the ventilation system to be "tuned" for maximum removal efficiency (ref. ChromeTech file).

Some existing shops may have space limitations that preclude the installation of meshpad mist eliminators or cause installation costs to be exorbitant. This is particularly a problem where the existing ductwork is crowded together or obstructed. Also, it is preferable to locate the mist eliminator at an elevation that is higher than the exhaust hood with the air flow in the horizontal direction.


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