Wet Scrubber
A Wet Scrubber is an industrial air pollution control system that uses water or a suitable scrubbing liquid to capture particulate matter, fumes and soluble gaseous pollutants from industrial exhaust and process gas streams.
What Is a Wet Scrubber?
A wet scrubber is an industrial air pollution control system designed to clean exhaust gases before they are discharged from the plant.
Depending on the application, a wet scrubber can be designed to capture particulate matter, dust, fumes and suitable soluble gaseous pollutants.
The scrubbing liquid may be plain water or a chemically treated solution selected according to the pollutant characteristics and treatment requirements.
How Does a Wet Scrubber Work?
1. Contaminated Gas Entry
Polluted air or process gas enters the wet scrubber.
2. Gas-Liquid Contact
The gas comes into close contact with water or a suitable scrubbing solution.
3. Pollutant Capture
Particulate matter and suitable soluble gaseous contaminants are transferred from the gas stream into the liquid phase.
4. Treated Gas Discharge
Treated gas leaves the scrubber while the collected liquid is handled through the appropriate liquid-management arrangement.
MS & SS Wet Scrubber
Wet scrubbers can be manufactured using different materials depending on the operating environment.
Mild Steel (MS) Wet Scrubber
MS wet scrubbers are a practical option for general industrial applications where the process environment does not require high corrosion resistance. They can provide a cost-effective solution for suitable dust and emission-control applications.
Stainless Steel (SS) Wet Scrubber
SS wet scrubbers are suited to more corrosive environments where the gas stream may contain aggressive chemicals, acid fumes, moisture, or other corrosive emissions. Stainless steel construction can provide improved corrosion resistance and service durability.
Types of Bag Filters
Tower Wet Scrubber
Tower scrubbers provide contact between the contaminated gas and scrubbing liquid inside a vertical vessel. They can be configured for different gas-treatment requirements.
Venturi Wet Scrubber
Venturi scrubbers use high-velocity gas flow to create strong gas-liquid contact. They are particularly useful for applications requiring particulate capture and intensive mixing.
Packed Bed Scrubber
Packed bed systems use packing material to increase the contact area between gas and liquid. They are often considered for absorption of soluble gaseous contaminants.
Cyclonic Wet Scrubber
Cyclonic designs use centrifugal action along with liquid contact to assist in separating particulate matter from the gas stream.
Key Benefits of Wet Scrubbers
Effective particulate collection for suitable applications.
Can be designed for absorption of suitable soluble gaseous pollutants.
Suitable for selected industrial fumes and process emissions.
Different scrubber configurations can be selected according to process requirements.
MS, SS and other suitable materials can be considered according to the operating environment.
Certain wet scrubber configurations can provide compact installation options.
Can be integrated with existing exhaust and emission-control systems.
Recirculation systems can be incorporated according to process requirements.
Designed according to gas flow, pollutant characteristics and plant layout.
How to Select the Right Wet Scrubber?
Industrial chimney selection should consider the complete exhaust system, including:
- Gas flow rate
- Type of pollutants
- Pollutant concentration
- Gas temperature
- Particle size
- Chemical composition
- Required removal efficiency
- Scrubbing liquid requirements
- Corrosion conditions
- Available installation space
- Wastewater or liquid disposal requirements
Why Choose a Customized Wet Scrubber?
Industrial exhaust conditions can vary significantly from one plant to another. A customized wet scrubber can be designed around the required gas flow, pollutant characteristics, operating temperature, material compatibility, and available plant space.
Elenor provides customized wet scrubber solutions and supports design, supply, installation, and maintenance requirements for industrial applications.
Applications
- Chemical & Petrochemical
- Pharmaceutical & Fertilizer
- Metal Processing & Foundries
- Food & Beverage
- Paints, Coatings & Adhesives
- Textile & Polymer Processing
- Boilers & Furnaces
Frequently Asked Questions
What is a wet scrubber?
A wet scrubber is an air pollution control device that uses water or a chemical scrubbing liquid to capture pollutants from industrial exhaust gases.
What pollutants can a wet scrubber remove?
Depending on its design, a wet scrubber can remove particulate matter, dust, fumes, and soluble gases from industrial gas streams.
What is the difference between an MS and SS wet scrubber?
An MS wet scrubber is generally suitable for less corrosive industrial environments, while an SS wet scrubber offers better corrosion resistance for applications involving aggressive gases, acid fumes, and moisture.
Where are wet scrubbers used?
Wet scrubbers are used in chemical, pharmaceutical, fertilizer, metal, food, paint, textile, polymer, boiler, and furnace applications.
Is a wet scrubber suitable for chemical industries?
Yes. Wet scrubbers can be designed for chemical-process exhaust where gaseous or particulate pollutants need to be treated. Material selection and scrubbing-liquid chemistry should be matched to the specific process.
Can wet scrubbers be customized?
Yes. Wet scrubbers can be customized according to gas flow, pollutant type, operating conditions, material requirements, plant layout, and treatment objectives.