The Critical Role of Scrubbers in Meeting Stricter Pollution Standards
With stricter air pollution regulations, scrubbers have become essential in industries where neighbourhoods and the environment are exposed to potentially contaminated gases. When used effectively, scrubbers can achieve high removal efficiency of harmful gas particles, ensuring that emissions released into the environment are safe.
What is an industrial scrubber?
A scrubber is a short word for Air Pollution Control Equipment or Exhaust Air Treatment Systems. They remove pollutants from exhaust gases by capturing and neutralizing contaminants using liquids. This way, industrial scrubbers reduce industrial carbon footprint and realize compliance with local or regional legislation.
The ‘Scrubbing’ refers to the adsorption phase where gases are neutralized by the components being dissolved by the liquid.
What are the types of Industrial Scrubbers?
Industrial scrubber can come in many variations these are the most common one:
Wet Scrubbers
Gas Scrubbers
Chemical Scrubbers
Dry Scrubbers
Energy Recovery Systems with Heat Exchangers & Heat Pumps
Integrated Heat Exchanger
Integrated heat exchanger which operates simultaneously with a wet scrubber, utilizing waste heat from exhaust air to enhance energy efficiency and reduce overall operational costs.
Integrated Heat Pump
An integrated heat pump which works alongside with a wet scrubber, recovering waste heat from the exhausted air and upgrading it to the desired temperature for enhanced energy recovery.
How do gas scrubbers work?
Scrubbers are systems that remove harmful gases from industrial air by absorbing them into a washing liquid, reducing pollution before emissions are released. The process relies on the solubility of the gases in the chosen liquid, often water or a chemical solution, sometimes enhanced with additives to neutralize or convert the captured pollutants.
Read more on wet scrubbers work or dry scrubbers work to clean emissions in manufacturing.
What are the advantages and disadvantages of Industrial Scrubbers
Even though we mainly see the benefits of using Wet Scrubbers, there are also some disadvantages that need to be considered.
| Advantages of Wet Scrubbers | Disadvantages of Wet Scrubbers |
|---|---|
| High Efficiency in collecting pollutants and removing them from the exhaust stream | Water usage. Purged liquid and disposed sludge needs replacement. |
| Broad application: Able to remove harmful contaminants from both high-temperature as humid gas streams. Collects a combination of particulate matter and gases | Slurry disposal. The concentrated slurry with toxic contaminants needs to be disposed of. |
| Compact size. Often easy to retrofit into existing manufacturing facility. | Acidic Slurries can be highly corrosive |
| Low pressure drop increasing efficiency | In some cases, regular maintenance remains needed. |
| Able to handle flammable and explosive dust | May cause plume formation |
| Provides cooling of hot gases | Susceptible to freezing |
*The biggest advantage is choosing for a tailored solution instead of a standard system that will always underperform. Operational Costs can be reduced and performance increased.
Energy Recovery & Reduction
Examples how a tailored solution lead to increased performance:
- Adding self-cleaning in-line Venturi Beds or rods to remove dust efficiently
- Minimized water and chemicals consumption by integration of mist eliminator and filtering the reagent so that it could be reused in the process.
- Replacing high maintenance condensers leading to no fouling and no risk for freezing.
- Adding a second stage for Odor Removal.
- Adding a Cyclone Separator for prefiltering
- Integrating a Heat Exchanger to recover waste heat. Subsequentially, a Heat Pump may be integrated to upgrade low grade waste heat.
- No over-dimensioning needed leading to lower investment needed and lower operating costs due to water/reagent consumption and energy usage.
Why choose JOA to advise, design & build your Exhaust Air Treatment System?
If you are looking for the best industrial scrubber supplier, you first need to accept that a standard solution will not suffice. Only a tailor-made Industrial Air Scrubber will be able to fully meet and exceed your requirements.
As a Clean Tech company, JOA has 4 main differentiators that result in the best possible solutions for Emission Control and Energy Recovery:
- Truly tailor-made solutions instead of standard equipment selected by price instead of value and long-term ROI.
- Thorough Air Technical Modeling and CFD Analysis to validate our designs and ensure 1st time right implementation
- Always based on a Pre-Engineering Study including Site Visit, Measurements, Concept Design and Budget Quotation
- Trusted by the largest manufacturers with the most complex industrial processes, worldwide.
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Industrial Scrubber FAQ
The costs of an industrial scrubber may range from €250.000,- and €2.500.000 depending on a multitude of considerations and requirements. Please read more about the costs of industrial scrubbers in our blog:What does a scrubber cost?
Up to 99,9% is certainly possible at 10 microns.
The scrubbing liquid is frequently heated by the exhaust gas. This heat can be recovered by a Heat Exchanger. An industrial Heat Pump can upgrade lower temperature waste heat. Read more about how heat pumps improve industrial processes.
The following substances are most frequently removed by scrubbers:
- CO2
- SO2 (Sulfur dioxide) and SOx (Sulfur Oxide)
- NOx (Nitrogen Oxide)
- (Chromic) Acid Gases
- Fluorides
- Chlorides
- Particulate Matter (e.g. Volatile Organic Compounds) can be reduced, which saves a lot of costs for ATEX equipment and insurance.
The most common is simple Water (H2O). Other solvent that are able to absorb contaminants are Sodium Hydroxide (NaOH), Calcium Hydroxide (CaOH2) and Sodium Carbonate (Na2CO3).
