Wet Scrubber Limitations

Wet scrubbers clean air by physically trapping PM on wet surfaces and absorbing gasses into the liquid. In some cases, the gasses react with chemicals in the liquid, too. Small liquid droplets are more effective per unit volume of scrubber liquid because they have more surface area than fewer, larger droplets. Very small liquid droplets, however, are difficult to remove from the airstream after they absorb or react with the gasses. PM is collected by physically impacting the PM into droplets or onto wet surfaces. PM is impacted on droplets or wet surfaces in different ways, depending on the scrubber type used.

While wet scrubbers can effectively remove some gasses and PM, their use is limited in some facilities because of their high-pressure drop and relatively high initial and operating costs. Scrubbers also require a system to handle the scrubber liquid effluent. Development of low-cost and high-efficiency wet scrubbers that do not significantly affect axial fan operation needs further study. Some of the challenges are:

  1. Clogging. Wet scrubbers can become clogged with accumulated PM if the air being treated has high PM concentrations. Particulate matter can accumulate in the packing material and restrict or block the airflow. The risk of wet scrubber clogging can be reduced by increasing the liquid flow or using either a cross- or concurrent flow configuration.
  2. Water Use. Wet scrubbers need to have sufficient and economical water supplies. Wet scrubbers can consume substantial quantities of water. The wastewater handling is an important consideration. Even if chemicals are not used, the gasses dissolved in the water make the scrubber liquid effluent unsuitable for discharge to public waters (i.e., streams, lakes, or wetlands). Scrubber effluent can be applied to cropland or added to a manure storage unit or treatment system in compliance with local, state, and federal regulations. Recycling scrubber effluent reduces wastewater generation.scroiler

When a common wet air scrubber often gets clogged, is expensive to use, or simply needs repairs, companies usually come to us. Our Scroiler™ is devoid of much-wet air scrubber’s drawbacks while operating at the same efficiency.

Every wet air scrubber currently installed worldwide can be replaced by a Scroiler™ for more effective air pollution control. Reference list includes more than 100 Scroiler™s installed since 2011 with 3 000 – 200 000 cfm capacity.  Our reference list is available on website: scroiler.com or if you have any questions, please contact us: scr@optromix.com

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