AirPol - Venturi Wet Scrubbers for Particulate Control
From Other Products
Venturi scrubbers use high-energy impaction of liquid droplets to remove particulate from contaminated air streams. Water or other liquors are directed towards a constriction, or “throat,” where the atomized liquid scrubs the particulate from the air and transfers it to the scrubber liquid droplets. This type of technology is a part of the group of air pollution controls referred to as wet scrubbers. The amount of particulate removed from the air stream, or “control efficiency,” is based on several design elements, including pressure drop and contact time.
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Products Details
- Basic: diverse applications
- Flooded Wall: high dust loading or hygroscopic nature of the dust
- Boiler: double-bladed throat damper for constant efficiency in fluctuating gas flows
- Quencher: high-temperature application
- Impactor: multiple scrubbing techniques for dissolving tanks
- Lime Slaker: mounted on top of lime slakers and uses the green slaker feed for scrubbing
- Basic Oxygen Furnace: very high gas volumes (up to 1,000,000 acfm) and dust loadings
- Type C-V: combines a venturi with an enhanced cyclonic separator for large particulates and acid gas removal
- Combination Particulate – Acid Gas Scrubbers: compact and low cost
AirPol Advantages
AirPol’s extensive history of designing venturi scrubbers to handle even the most difficult challenges equals unparalleled expertise in applications requiring wet scrubbers. The AirPol Venturi Scrubber:
- effectively collects sub-micron particles as well as coarser particles at lower pressure drop
- designs to meet any desired particulate removal efficiency
- works without spray nozzles or jets that can cause clogging
- adjustable throat dampers maintain constant removal efficiency at fluctuating gas volumes
- resists corrosion or abrasion via alloy materials and linings
- operate reliably with a proven record of minimal maintenance year after year
Industries Served
- Pulp and paper
- Chemical
- Iron and steel
- Cogeneration
- Incineration
- Metallurgical
- Pharmaceutical
- Wood products
- Minerals/mining
Dusty exhaust gas enters the flanged Venturi Scrub...
- Dusty exhaust gas enters the flanged Venturi Scrubber Inlet connection via ductwork from the process/emission source.
- Tangential Feed Pipes introduce scrubbing liquid supplied by the Recycle Pump. These are straight open pipes with no use of any spray nozzles that could plug and erode.
- The scrubbing liquid that is introduced swirls down through the Venturi Converging Section with a “dentist bowl” effect, providing the liquid for atomization and protecting the surfaces from both abrasion and build-up. The gas stream is accelerated due to the reduced cross-sectional area.
- Additional Radial Liquid Feed Pipes introduce more scrubbing liquid to ensure complete coverage of the round cross-section Venturi Throat.
- In the Mixing/Collision zone particulate is captured in the scrubbing liquid droplets created by the exhaust gas stream accelerated in the Venturi Scrubber.
- Pressure drop (related to exhaust gas velocity) across the Venturi Throat determines the collection efficiency achievable. Higher pressure drops allow greater collection efficiency. To accommodate fluctuating exhaust gas volumes, a damper is used to adjust the throat cross-sectional area to maintain operating pressure drop (for a constant efficiency)
- A long generous Diverging Section below the Venturi Throat promotes extended contact time for the particulate and scrubbing liquid and assists with pressure drop regain.
- The gas/liquid mixture turns and enters the Cyclonic Separator Inlet where it is accelerated into the spin zone. The entrained scrubbing liquid with captured particulate is removed via centrifugal force and drains to the bottom recycle sump section of the Separator vessel.
- A liquid reservoir in the bottom of the “Flooded Elbow” serves to cushion impact and prevent abrasion of metal surfaces.
- The scrubbing liquid with captured particulate drains to the Recycle Pump for recirculation back to the Venturi feed pipes while a small portion (“bleed”) is removed for disposal or treatment.
- Anti-Spin Baffles stop the gas spin and straighten the flow before the cleaned exhaust gas exits the Separator to an Exhaust Stack or ductwork.
- Cleaned exhaust gas exits the flanged Separator Outlet connection.
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