Venturi Scrubber

Venturi Section: The Venturi scrubber consists of a converging inlet section, a narrow throat, and a diverging outlet section, creating a constriction in the gas flow path.

Gas Inlet: The polluted gas enters the Venturi scrubber and passes through the converging section, causing the gas velocity to increase as it approaches the throat.

Spray Nozzles: A liquid, usually water or another suitable scrubbing solution, is injected into the gas stream through spray nozzles located at or near the throat of the Venturi. These nozzles create a fine mist or spray of the scrubbing liquid.

Gas-Liquid Contact: The high-velocity gas flow creates turbulence, causing the liquid droplets to collide and mix with the gas stream. This contact allows the pollutants (such as dust, particulates, or some gases) to be captured or absorbed by the liquid droplets.

Particle Capture: The pollutants adhere to the liquid droplets due to the collision and absorption processes.

Cleaned Gas Exit: The cleaned gas exits the Venturi scrubber through the outlet section while the liquid-laden with captured pollutants drains down to the bottom of the scrubber.

Separation and Collection: The liquid containing the captured particles is collected at the bottom of the scrubber and may undergo further treatment or be recycled for reuse. Some Venturi scrubbers may include separation devices to remove the captured particles from the liquid.

Maintenance: Proper maintenance, including nozzle inspection, liquid flow rate control, and periodic cleaning of the scrubber, is essential for optimal performance.

Disposal of Captured Material: Proper disposal or treatment of the collected pollutants in the liquid phase is necessary to prevent environmental issues.

Venturi scrubbers are effective air pollution control devices, but their performance may vary based on the specific application, gas stream characteristics, and the nature of pollutants being targeted. Consulting with experts in air pollution control systems can help in selecting the appropriate Venturi scrubber design for a particular industrial setting.