Wet Scrubber (Air Pollution Control Devices)
A Wet Scrubber is an advanced air pollution control system designed to remove particulate matter, toxic gases, fumes, vapors, and chemical contaminants from industrial exhaust streams. It operates by bringing contaminated air into direct contact with a scrubbing liquid (typically water or a chemical solution), which captures and removes pollutants.
Wet scrubbers are highly versatile and are widely used across industries because they can remove both solid particles and gaseous pollutants simultaneously. These systems are capable of achieving 90–99% removal efficiency, depending on the design and application.
Working Principle
Wet scrubbers operate on the principle of gas-liquid contact and mass transfer:
- Polluted gas enters the scrubber chamber
- Liquid is sprayed through nozzles forming fine droplets
- Pollutants collide with droplets and get absorbed or trapped
- Clean air exits through a mist eliminator
- Contaminated liquid is collected, treated, and recirculated
This process effectively removes contaminants by transferring them from the gas phase into the liquid phase.
Key Features
High Removal Efficiency
- Removes up to 99% particulate matter
- Gas absorption efficiency up to 90–98%
Dual Pollution Control
- Removes both dust particles and harmful gases
- Suitable for acidic fumes, VOCs, smoke, and odors
Corrosion Resistant Design
- Available in FRP, SS, PP, and coated MS
- Suitable for harsh industrial environments
Low Maintenance
- No filter replacement required
- Continuous operation with minimal downtime
Flexible Design Options
- Available in multiple configurations:
- Venturi Scrubber
- Packed Bed Scrubber
- Spray Tower Scrubber
Safe for Hazardous Applications
- Suitable for handling flammable and explosive dust environments
Types of Wet Scrubbers
Spray Tower Scrubber
- Simple design
- Moderate efficiency for larger particles
Venturi Scrubber
- High efficiency (up to 99%)
- Best for fine particulate removal
Packed Bed Scrubber
- Ideal for gas absorption
- Provides large contact surface area
Impingement Plate Scrubber
- Suitable for both gases and particulates
- Lower pressure drop
Technical Specifications
| Parameter |
Specification |
| Product Name |
Wet Scrubber |
| Application |
Air Pollution Control |
| Type |
Venturi / Packed Bed / Spray Tower |
| Air Flow Capacity |
500 – 200,000 CFM |
| Removal Efficiency |
90% – 99% |
| Particle Size Removal |
Up to 0.5 microns |
| Pressure Drop |
50 – 250 mmWC |
| Operating Temperature |
Up to 250°C |
| Material of Construction |
MS / SS 304 / SS 316 / FRP / PP |
| Scrubbing Liquid |
Water / Chemical Solution |
| Pump Type |
Centrifugal / Submersible |
| Nozzle Type |
Hollow Cone / Full Cone |
| Packing Material |
PP Pall Rings / Raschig Rings / Ceramic |
| Tank Capacity |
100 – 5000 Liters |
| Automation Grade |
Manual / Semi-Automatic / PLC Based |
| Power Supply |
220V / 415V AC |
| Motor Power |
1 HP – 50 HP |
| Installation Type |
Floor Mounted |
| Emission Output |
As per CPCB norms |
| Mist Eliminator |
Included |
| Recirculation System |
Available |
| Control Panel |
MCC / PLC Panel |
Main Components
- Inlet Duct
- Scrubber Chamber
- Spray Nozzles
- Packing Bed (optional)
- Circulation Tank (Sump)
- Recirculation Pump
- Demister (Mist Eliminator)
- Outlet Stack
- Control Panel
Applications
- Chemical Industries
- Pharmaceutical Plants
- Metal Processing Units
- Power Plants
- Fertilizer Plants
- Paint Booths
- Textile Industries
- Food Processing Units
- Boiler & Furnace Exhaust Systems
Advantages
- High efficiency for fine particles and gases
- Handles high temperature and moisture-laden gases
- Reduces risk of fire and explosion
- Compact and customizable design
- Effective odor and toxic gas control
Limitations
- Requires wastewater treatment
- Potential corrosion if not properly maintained
- Water consumption required
- Periodic maintenance for pumps and nozzles
Compliance & Standards
- CPCB (Central Pollution Control Board) Norms
- Industrial Emission Regulations
- ISO Quality Standards
