What Are Air Pollution Control Devices? What Do They Control?

By Author: Kapil Rathod
Total Articles: 87
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There are numerous types of air pollution control systems employed in various industries to control pollution. These equipment assist in removing the Volatile Organix Compounds (VOCs) and Hazardous Air Pollutants (HAPs) from industrial air, such as fumes, odors, sulfuric gases, and vapors.

Air pollution control devices are a collection of tools that block a variety of pollutants (both solid and gaseous) from entering the atmosphere out of the industrial smokestacks. This type of pollution control machinery can be divided into two broad categories - equipment that controls acidic gas emissions, and, devices that control the total amount of particulate matter. It is essential to note that the extraction procedures for each type of pollutant may differ, so, effective methods must be followed for extracting the pollutant. Despite being intensively intricate, these devices have proven to be efficient with decreased levels of emissions for many pollutants dropping with their implementation.

Note: HAPs and VOCs pose a threat to the environment, local ecosystems, and also on human health. They result in chronic conditions ...
... such as smog, carbon emissions, acid rain, and overall climate change.

What do Air Pollution Control Systems limit?

Particulate Matter Control

Some specific types of equipment and machines are used to separate the particulate matter from the flue gases. The major part of this separation process employs physical means of separation and not other chemical techniques. It's because the particulate matters are generally significant in size and can be easily caught with these tools.

Few machines that are employed in industries to reduce particulate matter in flue gases are as follows:

Electrostatic Precipitators
Cyclone Separators
Fabric Filters

Gas Control

Removing toxic chemicals from the gases may demand utilizing intense chemical methods of separation. Such robust processes are required to separate polluting gases from the flue gas. However, this extraction is essential as several acidic gases in flue gas also contribute to acid rain. Following are some basic methods, which can be used to extract the harmful gases:

Incineration
Scrubbers
Carbon Capture

How Air Pollution Control Systems Works?

Air pollution control equipment may work in one of three different ways:

1. Chemical modification

This system involves converting a dangerous chemical into an inert one. This is achieved by following a similar process to flue gas desulphurization electrostatic precipitator.

Besides, to help clean up nitrogen oxide, specific controls consist of selective catalytic reduction processes. These modulate nitrogen oxide emissions from non-moving sources and particular non-catalytic reduction. It's a procedure that changes oxides of nitrogen (NOx) into molecular nitrogen (N2).

If VOCs have recovery value, technicians can employ carbon adsorption, condensation, and scrubbing to recuperate particles. If not, technicians may use catalytic oxidation thermal oxidation or biofiltration.

2. Contaminant Destruction

This kind of air purification is the most difficult, as it involves reaching high boiling points to burn out the chemicals with very high boiling points.

3. Hazard Removal

Eliminating the hazard from the air is the most common and convenient form of purifying the air. That can be accomplished in multiple ways, but mostly it's done using filter systems.

Conclusion

The significance of air pollution control cannot be exaggerated, as air is paramount to our existence. By employing air pollution control systems, we are making our life better, safer, and easier.