The materials used in wet scrubbers are critical to their performance, durability, and resistance to corrosion. Here’s an overview of common materials used in various components of wet scrubber systems:
1. Scrubber Vessel
-
Carbon Steel: Often used for general-purpose scrubbers; however, it may require coatings for corrosion resistance.
-
Stainless Steel: Commonly used due to its excellent corrosion resistance, especially in environments with acidic or basic scrubbing solutions.
-
Fiberglass Reinforced Plastic (FRP): Lightweight and resistant to corrosive chemicals, often used for smaller or less severe applications.
-
Polypropylene: Used in some scrubbers for its chemical resistance, particularly in applications involving corrosive liquids.
2. Internal Components
Nozzles and Spray Systems
-
Plastic Materials: Such as PVC or CPVC, which are resistant to corrosion and suitable for various chemical environments.
-
Stainless Steel: Used in high-temperature or high-pressure applications for its durability.
Mist Eliminators
-
Polypropylene or PVC: Commonly used due to their resistance to chemicals and ease of cleaning.
-
Metal Alloys: Such as stainless steel, may be used in high-performance applications where robustness is required.
3. Pumps and Valves
-
Cast Iron: Often used for pumps in less corrosive environments, but may require protective coatings.
-
Stainless Steel: Preferred for pumps and valves handling corrosive scrubbing liquids.
-
Plastic Pumps: Such as those made from polypropylene or PVDF, are used for highly corrosive applications.
4. Piping and Fittings
-
Stainless Steel: Commonly used for its strength and corrosion resistance.
-
PVC or CPVC: Used in systems where the temperature and pressure are within safe limits for these materials.
5. Linings and Coatings
-
Epoxy Coatings: Applied to carbon steel vessels to enhance corrosion resistance.
-
Rubber Linings: Used in some applications to protect against corrosive liquids.
The choice of materials in wet scrubber systems is influenced by the specific application, the nature of the pollutants being treated, and environmental conditions. Selecting the right materials is essential for ensuring efficiency, safety, and longevity of the scrubber system.
