This Specifications of Wet Scrubber cover supply, erection, testing and commissioning of Wet Scrubber. The
specifications shall be read in conjunction with bill of quantities
A wet scrubber used in a pharmaceutical manufacturing plant, particularly for tablet coating machines, is a critical air pollution control device. It ensures compliance with stringent environmental regulations by efficiently capturing fine particulate matter and chemical fumes generated during the coating process. wet scrubber is an advanced air pollution control device designed to effectively eliminate pollutants from industrial exhaust streams. Utilizing a liquid, typically water, it absorbs and captures harmful substances, ensuring cleaner emissions and reduced environmental impact. As specialize in manufacturing high-performance wet scrubbers tailored to address diverse industrial requirements. Below are the detailed technical specifications:
How Wet Scrubbers Work
The core mechanism of a wet scrubber involves spraying liquid into the exhaust gas stream. This liquid interacts with the pollutants, either dissolving or trapping them through chemical or physical processes, ultimately removing them from the air.
Pollutants Handled by Wet Scrubbers
Wet scrubbers are particularly effective against a wide range of acidic and toxic gases, including:
- Sulfur dioxide (SO₂)
- Phosphoric acid
- Silicon tetrafluoride
- Hydrochloric acid (HCl)
- Nitric acid (HNO₃)
- Ammonia (NH₃)
- Fluorine compounds
Their versatility ensures efficient removal of these contaminants, making them essential for gas cleaning, fume treatment, and industrial gas treatment applications.
Advantages of Wet Scrubbers
Wet scrubbers provide several benefits, making them a preferred choice across industries:
- Effective Pollutant Removal
- Efficiently captures and removes acidic gases and fine particles, even those smaller than 10 micrometers.
- Versatility
- Customizable for various contaminants and industrial needs.
- High Temperature Resistance
- Capable of handling hot gas streams and high-temperature environments.
- Low Maintenance
- Requires minimal upkeep compared to other air pollution control systems.
- No Secondary Waste
- Unlike some systems, wet scrubbers do not produce additional waste.
- Enhanced Safety
- Water-based operation minimizes the risk of fire and explosions.
Wet Scrubber Working Principle
Key Features of Wet Scrubbers
- Scrubbing Liquid
- Primarily uses water as a medium to capture pollutants.
- Gas-Liquid Contacting Mechanisms
- Utilizes advanced mechanisms like spray towers, packed bed scrubbers, and Venturi scrubbers for effective pollutant capture.
- High Removal Efficiency
- Excels in removing dust, acid gases, and toxic compounds from industrial exhaust streams.
- Durable Materials
- Constructed using corrosion-resistant materials like FRP to ensure longevity and reliability.
- Monitoring Systems
- Equipped with advanced monitoring and control systems to optimize performance.
- Safety Measures
- Features such as pressure relief valves and leak detection systems ensure operational safety.
- Compliance with Standards
- Designed to meet stringent environmental regulations and standards, ensuring legal compliance.
Applications of Wet Scrubbers
Wet scrubbers are integral to various industries due to their ability to treat harmful emissions. They are extensively used in:
- Gas Cleaning Plants: To purify industrial exhaust gases.
- Fume Treatment Facilities: For removing hazardous fumes generated during manufacturing.
- Gas Treatment Units: To ensure compliance with air quality standards.
Why Choose Wet Scrubbers?
The design and manufacture wet scrubbers that combine efficiency, durability, and ease of maintenance. Our FRP-based scrubbers are engineered to handle high-temperature gas streams, ensuring robust performance in demanding industrial settings.
With our commitment to innovation and compliance with environmental standards, our wet scrubbers are a reliable solution for addressing air pollution challenges. Whether your industry involves chemical processing, power generation, or manufacturing, our wet scrubbers are tailored to meet your needs.
Electrical Equipment:
All electrical equipment shall be suitable for 415 Volt. Voltage range +/10%, 3 phase, 4 wire, 50 cycle.
Construction:
The Scrubber to be complete with Channel frame, Water Re-circulation Tank, PP Pole rings, Distribution Plate, spray Nozzles, Mist eliminator, PP Pump with FLP motor, PP Valves, PP Strainer, Level indicator, Pressure Gauge, Rotameter.
Material of Construction:
Body – 3 mm PP + 3 mm FRP
Water Tank – 3 mm PP + 5 mm FRP
Dampers – (PP + FRP) in suction & Discharge
Exhaust Blower, M. S. fabricated with FRP internal lining, Direct driven. Interconnecting ducting between the Scrubber and Blower to be in 3mm PP and 5 mm FRP construction suitably reinforced along with flange joints, gaskets and supports as required. Necessary Structure Support required for erection of the Scrubber.
Ducting:
Fabrication of Scrubber Exhaust Ducting from the Walkable Ceiling Level to Scrubber Inlet and Blower Outlet to Plant Exhaust in 3 mm PP and 5 mm FRP Suitably reinforced along with flange joints, gaskets and supports as required.
General Specifications
| Feature | Specification |
|---|---|
| Type | Wet Scrubber (Venturi or Packed Bed) |
| Application | |
| Capacity : 150-5000 CMH | |
| Scrubber Medium (Water/Solution) | |
| Material of Construction (FRP/PP/SS316) | |
| Design Standards | ASME/ISO Compliant |
| Country of Origin |
Performance Characteristics
| Parameter | Details |
|---|---|
| Particle Removal Efficiency(≥ 95% for particles ≤ 5 microns) | |
| Gas Removal Efficiency (≥ 90% for volatile organic compounds (VOCs)) | |
| Airflow Velocity (15–25 m/s (adjustable based on requirements)) | |
| Pressure Drop 150–350 mm WC (water column) | |
| Temperature Handling (Up to 150°C) | |
| Humidity Tolerance (100% RH) |
Scrubbing Mechanism
| Mechanism | Details |
|---|---|
| Gas-Liquid Contact | Spray Tower or Packed Bed for high efficiency |
| Liquid Flow Rate | 5–20 LPM per 1000 CMH airflow |
| Packing Material | Polypropylene rings or structured packing |
| Mist Eliminator | Integrated mesh or chevron-type eliminators |
| Drain System | Automated drain with residue separation |
Operational Features
| Feature | Details |
|---|---|
| Monitoring System | Digital flow, pressure, and temperature gauges |
| Control System | PLC-based automation with alarm indicators |
| Maintenance | Easy access for cleaning and servicing |
| Safety | Over-pressure relief valves and leak detectors |
| Secondary Waste Management | Sludge and water separation system |
Frequently Asked Questions
What are the parameters of a wet scrubber?
A: The key parameters of a wet scrubber include:
- Gas flow rate (CFM or m³/h)
- Pressure drop (in mm WC or Pa)
- Liquid flow rate (LPM)
- Removal efficiency (% for particulates and gases)
- Scrubber type (Venturi, packed bed, spray tower, etc.)
- Gas and liquid contact time
What are the criteria for wet scrubber design?
A: The design criteria for a wet scrubber include:
- Type and concentration of pollutants to be removed
- Gas stream temperature and flow rate
- Required removal efficiency
- Compatibility of scrubbing liquid with pollutants
- Corrosion resistance and material of construction
- Operating and maintenance cost considerations
How to calculate wet scrubber capacity?
A: Wet scrubber capacity is calculated based on the exhaust gas flow rate and pollutant concentration. The formula:
Capacity (CFM) = Exhaust gas flow rate × Pollutant load removal efficiency
Other factors include:
- Gas temperature and pressure
- Liquid-to-gas ratio
What is the principle of a wet scrubber?
A: The principle of a wet scrubber is gas-liquid interaction. Pollutants in the gas stream are absorbed or entrapped by the scrubbing liquid (e.g., water), which removes particulates, acidic gases, and toxic substances through chemical or physical processes.
What is the capacity of a scrubber?
A: The capacity of a scrubber ranges from 150 CMH to several thousand CMH, depending on the application, pollutant load, and industry requirements.
What is the pH limit for a scrubber?
A: The pH of the scrubbing liquid typically ranges between 6 and 9, depending on the type of pollutants being treated. For acidic gases like sulfur dioxide, a neutral to slightly alkaline pH is preferred.
What is CFM in a scrubber?
A: CFM (Cubic Feet per Minute) measures the air flow rate through the scrubber, indicating the volume of gas treated per minute.
What is the working principle of a scrubber?
A: The working principle involves introducing a liquid spray into the gas stream. The pollutants dissolve in or are captured by the liquid droplets, and the cleansed air exits while the polluted liquid is collected for treatment.
Which chemical is used in wet scrubbers?
A: Common chemicals include:
- Water (primary scrubbing medium)
- Alkaline solutions (e.g., sodium hydroxide for acidic gases)
- Acids (e.g., sulfuric acid for ammonia removal)
- Oxidizing agents (e.g., sodium hypochlorite for odor control)
What is the efficiency of a wet scrubber?
A: Efficiency typically ranges from 90–99% for particulate matter and gases, depending on design and pollutant type.
What is the flow rate of a wet scrubber?
A: The liquid flow rate is usually 5–20 LPM per 1000 CFM of gas flow, adjusted based on pollutant load and type.
How to improve scrubber efficiency?
A: To improve efficiency:
- Optimize liquid-to-gas ratio
- Ensure proper maintenance (e.g., cleaning nozzles and packings)
- Use efficient packing materials
- Monitor pH and flow rates regularly
- Employ advanced monitoring systems
What is flooding in a scrubber?
A: Flooding occurs when excessive liquid flow prevents proper gas flow, leading to pressure buildup and reduced efficiency. It is caused by overloading or improper design.
What is the velocity of a wet scrubber?
A: Typical gas velocities range from 15–25 m/s, depending on the scrubber type and application.
What are wet scrubber units?
A: Wet scrubber units are systems designed for air pollution control, including spray towers, Venturi scrubbers, and packed bed scrubbers, configured to suit specific industrial applications.
What is the pH range of a scrubber?
A: The pH range is typically 6–9, adjusted according to the nature of the pollutants.
What is the pressure of a water scrubber?
A: Pressure drops typically range from 150–350 mm WC (water column), depending on the system design and pollutant load.
What is the liquid-to-gas ratio for a wet scrubber?
A: The typical liquid-to-gas ratio ranges from 0.4 to 1.2 gallons per 1000 CFM, adjusted for efficiency and pollutant characteristics.
How many types of scrubbers are there?
A: The main types of scrubbers are:
- Wet Scrubbers (Spray Tower, Venturi, Packed Bed)
- Dry Scrubbers
- Semi-dry Scrubbers
What is the maintenance of a wet scrubber?
A: Wet scrubber maintenance includes:
- Regular cleaning of nozzles and packing materials
- Monitoring pH and flow rates
- Inspecting for corrosion or leaks
- Routine performance testing and servicing
Monitoring by Control Technique – Wet Scrubber For Particulate Matter