What is the Flue Gas Desulfurization Process?
Flue Gas Desulfurization (FGD) is a critical air pollution control technology that removes sulfur oxides (SO₂/SO₃) from industrial exhaust gases. Widely used in coal-fired power plants, steel mills, and chemical factories, FGD systems protect the environment while facing severe corrosion challenges from acidic byproducts.
Glass Flake Resin Anti-Corrosion Technology for FGD Systems
I. Construction Methods
The glass flake resin lining combines:
E-glass flakes (0.1-3mm thickness)
Vinyl ester resin (acid-resistant matrix)
Applied via manual troweling, this composite forms a 5-layer protective system with:
✔ 2x base coats (1.5mm each)
✔ 2x reinforced coats (with glass cloth)
✔ 1x top sealant
II. Key Construction Features
| Factor | Requirement | Industry Standard |
|---|---|---|
| Workmanship | Skilled manual application | ISO 12944-5 |
| Sealing | 100% coverage, especially joints | NACE SP0188 |
| Bubble Control | Mechanical mixing + vacuum degassing | ASTM D6943 |
| Safety | Explosion-proof ventilation + PPE | OSHA 1910.120 |
Critical notes:
Prevent stress cracks at pipe elbows using Kevlar fiber patches
Cure time: 24h @25°C (accelerated with IR heaters)
III. Substrate Preparation for FGD Equipment
Metal Shell Requirements
Structural Integrity
Minimum 6mm carbon steel thickness
Welds ground to <1mm roughness (per ASME B31.3)
Surface Treatment
Sandblasting to Sa 2.5 (ISO 8501-1)
Anchor profile: 50-75μm (for resin adhesion)
Pre-Installation Checks
Hydrotest passed at 1.5x design pressure
No post-lining welding allowed
FGD Anti-Corrosion Performance Data
| Material | Service Life | Max Temp | pH Range |
|---|---|---|---|
| Glass Flake Vinyl Ester | 10-15 years | 120°C | 1-12 |
| PP Lining | 5-8 years | 80°C | 2-11 |
| Rubber Lining | 7-10 years | 90°C | 3-10 |
Contact Us
If you have any questions about the anti-corrosion measures for flue gas desulfurization systems or other related products, please feel free to contact us. Darko is dedicated to providing high-quality anti-corrosion solutions to help businesses achieve sustainable development.
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