industrial air pollution

Scrubber System for Flue Gases

Scrubber System for Flue Gases

Scrubber System for Flue Gases on Budget: Behind the Scenes

toxic air from industries

The harmful gases and odours caused by the flue gases of industries and enterprises pose a great threat to human and environmental health.

Scrubbers are used to treat this flue gases and output 99.99% clean air in the environment.

Let’s first learn what happens inside a Scrubber System.

How does it work?

Scrubbing liquid is introduced by a distributor (1) and uniformly distributed over the packed bed (2).

The polluted gas enters through the gas inlet (4) and rises through the packing support plate (5) into the packed bed section, flowing in the opposite direction of the downward running liquid.

The high surface area packing elements (6) provide a large number of liquid films and droplets, allowing for quick and homogeneous absorption of gaseous pollutants for optimal removal efficiency.

The pollutants can either be physically absorbed or chemically treated with a solution.

Before the purified gas leaves via the top gas outlet (8), the mist eliminator (7) combines and removes any liquid droplets and impurities in mist form.

working model of scrubber system

Scrubbing Liquid Type:

Most commonly used scrubbing is simple water. But water doesn’t absorb pollutants in all types of flue gases.

When flue gases containing Ammonia, dilute sulphuric acid (H2SO4) is typically used to neutralize the ammonia.  The resulting by-product is a form of salt which is collected and removed from the contaminated solution.

For acidic flue gases such as Chlorine gas and Sulphuric Acid Gas, caustic solutions such as Sodium hydroxide (NaOH), Calcium hydroxide, (Ca(OH)2) or Sodium carbonate (Na2CO3) to dissolve gaseous pollutants in the scrubbing liquid and produce clean air.

Where are Scrubber systems used?

Scrubbers are necessary in a wide range of industries, since many industrial facilities produce various air pollutants. Some environments in which a scrubber may be essential include:

  • Food and agriculture
  • Electroplating
  • Acid plants
  • Fertilizer plants
  • Steel mills
  • Asphalt plants

Advantages of a Scrubber System:

  • Relatively Low Pressure Drop
  • High Mass-Transfer Efficiencies
  • Packing Height or Type Adjustments
  • Relatively Low Capital Cost
  • Small Space Requirements
  • Collects Particulate Matter as Well as Gases


If you’re interested in learning more about Scrubber Systems, contact us. We design state-of-the-art odor and emission control systems for specific industry applications. We use multiple construction materials, sizes and other elements to create the most effective possible solutions. Learn more about our custom equipment-design services at vgprocess.com.

Contact Us

Feel free to contact us if you’d like to discuss a project that requires scrubber system or schedule a complimentary site inspection.

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