Mechanical filter-based pollution control system to remediate cooking emissions

A mechanical filter-based air pollution control system for removing particle and gas phase pollutants in a waste airstream exhausted from commercial cooking operations, comprising:

• a housing having an inlet and an outlet,
• an exhaust fan attached to the outlet for drawing the waste airstream into the inlet and through the housing to the outlet and discharging to the outside atmosphere,
• a disposable, synthetic first stage filter with an efficiency rating of MERV 6-10 for filtering particles in the waste airstream,
• a second stage filter arranged within the housing and downstream of the first stage filter, the second stage filter including a wool layer attached to a MERV 15 synthetic media therein for removing particle and gas phase pollutants remaining in the waste airstream after passing through the first stage filter,
• a third stage filter arranged within the housing and downstream of the second stage filter, the third stage filter including an oil-mist media therein for removing sub-micron particle pollutants remaining in the waste airstream after passing through the second stage filter,
• a fourth stage filter arranged within the housing and downstream of the third stage filter for removing, by adsorption, sub-micron particle and gas phase pollutants remaining in the waste airstream after passing through the third stage filter, and
• injection means to inject activated ozone, which comprises ozone with a surplus of hydroxyl radicals, within the housing to initiate advanced oxidation processes (AOPs) upon contact of the activated ozone with the waste airstream so as to decompose particle and gas phase pollutants within the waste airstream and retained in the first through fourth stage filters,
• wherein the fourth stage filter quenches any fugitive or unused ozone remaining in the system.

A mechanical filter-based air pollution control system for removing particle and gas phase pollutants in a waste airstream exhausted from commercial cooking operations, comprising:

• a housing having an inlet and an outlet,
• an exhaust fan attached to the outlet for drawing the waste airstream into the inlet and through the housing to the outlet and discharging to the outside atmosphere,
• a fogger assembly arranged within the housing at the inlet and connected to a cold water source for spraying fog droplets to mix with the incoming waste airstream so as to condense gas phase pollutants in the airstream to condensed particles,
• a first stage metal filter arranged within the housing and downstream of the fogger assembly for filtering particle pollutants, and solubilizing and removing by drainage polar particle and gas phase pollutants in the waste airstream,
• a wash mechanism arranged in the housing in facing relation to a front of the first stage filter, the wash mechanism including a manifold supporting a plurality of spray nozzles thereon, the manifold supplying a mix of heated water from a hot water source and detergent to the nozzles for periodically washing surfaces of the first stage filter to remove grease therefrom,
• a second stage filter arranged within the housing and downstream of the first stage filter for removing particle and gas phase pollutants remaining in the waste airstream after passing through the first stage filter,
• a third stage filter arranged within the housing and downstream of the second stage filter for removing sub-micron particle including condensed particle pollutants remaining in the waste airstream after passing through the second stage filter,
• a fourth stage filter arranged within the housing and downstream of the third stage filter for removing, by adsorption, condensed particles and gas phase pollutants remaining in the waste airstream after passing through the third stage filter, and
• injection means to inject activated ozone within the housing, which comprises ozone with a surplus of hydroxyl radicals, to initiate advanced oxidation processes (AOPs) upon contact of the activated ozone with the waste airstream so as to decompose particle and gas phase pollutants within the waste airstream and retained in the first through fourth stage filters, wherein the fourth stage filter quenches any fugitive or unused ozone remaining in the system.