Scrubber filters: the solution for industrial vapors abatement

Scrubber filters, also known as washing towers, are wet filtration systems designed to remove vapors, gases, and dust generated during industrial processes.

Through the interaction between air and washing liquid, they effectively eliminate soluble pollutants such as Volatile Organic Compounds (VOCs), acids or alkaline substances, improving air quality and safety in work environments.

In this article we find out how scrubber filters work, what types exist, and why they are a versatile, efficient, and sustainable choice for controlling industrial emissions.

How does an industrial scrubber filter work?

The operation of a scrubber filter is based on a wet washing process, where the contaminated airflow comes into direct contact with a sprayed washing liquid.

Polluted air enters the lower section of the washing tower, where it meets the liquid in a counter-current flow. This interaction promotes the capture and dissolution of solid particles and Volatile Organic Compounds (VOCs) contained in the stream.

Inside the scrubber, the air moves slowly over a large contact surface, ensuring high efficiency in gas–liquid exchange.
Depending on specific needs, the process can include multiple washing stages, each optimized for particular pollutants (e.g., acidic compounds, alkaline substances, or organic solvents).

The result is purified air that complies with emission limits set by environmental regulations and is free from harmful substances or unpleasant odors.

What are the main types of scrubber filters?

• Vertical scrubbers (washing towers): remove water-soluble chemical compounds; they are the most common configuration.
• Venturi scrubbers: use the pressure drop in the Venturi throat to force pollutants into the washing liquid; ideal for dust and VOCs.
• Horizontal scrubbers: suitable for installations with limited vertical space; air purification occurs along the tower’s length.
• Floating-bed scrubbers: Feature a fluidized bed that enhances air–liquid contact while minimizing floor space requirements.

Advantages of Scrubber filters compared to other VOC abatement technologies

• High abatement efficiency for vapors, gases, and dust.
• Low maintenance costs and automated systems.
• Reliability over time and wide possibility of customization.
• Reduction of VOC-related odors .

HF Group's VOC abatement applications and solutions

Scrubber filters are used in a wide range of industrial settings where vapors, gases, or particulate pollutants are generated.
Here are some typical examples:

• Painting and surface finishing plants, for abatement of organic solvents and vapors.
• Chemical and pharmaceutical processes, where acid or alkaline gases need to be neutralized.
• Mechanical and metallurgical processing, where oily fumes and vapors are present.
• Food and water treatment industries, for the reduction of odors and organic emissions.

Thanks to their modular design, multiple washing towers can be combined in series or stacked to achieve maximum efficiency even in the most complex production processes.

At HFiltration we design and manufacture custom scrubber filters for every production need, offering high-efficiency wet solutions for the abatement of vapors, gases and dust.

Contact us today to discover the right scrubber filter for your company and improve the air quality in your production facility.