Wet Scrubber

{
  "id": "MLC-T-ENV-030369",
  "term": "Wet Scrubber",
  "field": "Environment",
  "definition": "1. Add-on air pollution control device that utilizes an alkaline scrubbing liquor to collect particulate matter (including nonvaporous metals and condensed organics) and/or to absorb and neutralize acid gases.\n\n2. Add-on air pollution control device that removes pollutants from a gas stream by bringing them into contact with a liquid, typically water.\n\n3. Device that contacts an exhaust gas with a liquid to remove particulate matter and acid gases from the exhaust. Examples are packed-bed wet scrubbers and venturi scrubbers.\n\n4. Any add-on air pollution control device that mixes an aqueous stream or slurry with the exhaust gases from a boiler to control emissions of particulate matter or to absorb and neutralize acid gases, such as hydrogen chloride. A wet scrubber creates an aqueous stream or slurry as a byproduct of the emissions control process.\n\n5. Air pollution control devices used to remove particulates and fumes from air by entraining the pollutants in a water spray.\n\n6. Add-on air pollution control device that utilizes an alkaline scrubbing liquor to collect particulate matter (including non-vaporous metals and condensed organics) and/or to absorb and neutralize acid gases. [40 CFR 62.14490 (CFR 2018)]\n\n7. Add-on air pollution control device that utilizes an aqueous or alkaline scrubbing liquor to collect particulate matter (including non-vaporous metals and condensed organics) and/or to absorb and neutralize acid gases. [40 CFR 62.14840 (CFR 2018)][40 CFR 62.16045 (CFR 2018)]\n\n8. APCD that uses water, which may include caustic additives or other chemicals, as the sorbent. Wet scrubbers may use any of various design mechanisms to increase the contact between exhaust gases and the sorbent.\n\n9. Air pollution control device that removes particulate matter and acid gases from the waste gas stream of stationary sources. The pollutants are removed primarily through the impaction, diffusion, interception and/or absorption of the pollutant onto droplets of liquid. Wet scrubbers include venturi scrubbers, marble bed scrubbers, or impingement scrubbers. For purposes of this subpart, wet scrubbers do not include dynamic wet scrubbers.",
  "references": [
    "40 CFR 60.51c (CFR 2013)",
    "40 CFR 63.9824 (CFR 2013)",
    "40 CFR 63.9942 (CFR 2013)",
    "40 CFR 63.11237 (CFR 2013)",
    "40 CFR 467.02 (CFR 2013)",
    "40 CFR 62.14490 (CFR 2018)",
    "40 CFR 62.16045 (CFR 2018)",
    "40 CFR 63.8665 (CFR 2020)",
    "85 FR 45476; 40 CFR 63.9652 (CFR 2021)"
  ],
  "url": "https://mlchart.com/terminology/environment/wet-scrubber/"
}