Venturi Scrubbers

Venturi scrubbers are used to remove harmful pollutants and particles from industrial emissions. They are highly effective against fine dust, aerosols, acidic vapors, organic solvents, nitrogen oxides (NOx), sulfur dioxide (SO₂), ammonia (NH₃), chlorine (Cl₂), hydrogen chloride (HCl), and hydrogen sulfide (H₂S).

These systems are widely used in industries such as:
✔ Flue gas cleaning in power plants
✔ Waste incineration facilities
✔ Metal processing and chemical production
✔ Industrial ovens and distillation processes

HOW DOES A VENTURI SCRUBBER WORK?

Venturi scrubbers utilize the Venturi effect, a physical principle discovered by Italian engineer Giovanni Battista Venturi. This effect describes how a gas or liquid stream accelerates and undergoes a pressure drop when passing through a narrow opening – the Venturi throat.

As the gas stream flows through the Venturi throat, liquid droplets are simultaneously injected into the scrubber. This can be water or a specific chemical solution, depending on the pollutants that need to be removed.
Due to the high relative velocity between the gas and liquid in the Venturi scrubber, unwanted components are captured through collision, absorption, or chemical reaction. The liquid containing the trapped contaminants and particles is then discharged, leaving behind purified gas.

BENEFITS OF VENTURI SCRUBBERS

High removal efficiency – effectively captures particles and gas-phase pollutants.
Efficient in removing contaminant particles.
Performs well at high temperatures.
Simple design.
Resistant to fouling.
Flexible – adaptable to varying flow rates and process conditions.

In Detail

1. Venturi effect

A Venturi scrubber contains a narrowing tube that increases gas velocity while reducing pressure, creating a low-pressure zone where pollutant capture is optimized.

2.Liquid injection

Depending on the application, water or a chemical solution is injected into the Venturi tube. The Venturi effect disperses the liquid into fine mist droplets.

3. Gas-liquid interaction

The high-speed interaction between gas and liquid ensures that pollutants are captured through collision, absorption, or chemical reaction.