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FRP Flue Gas
Desulfurization
System
Absorber tower · ducting · slurry tank · mist eliminator
Wet limestone (CaCO₃) FGD packages engineered to remove SO₂ from coal-fired boiler flue gas at ≥95% efficiency. Composite construction immune to sulfuric/sulfurous acid mist, chloride attack, and abrasion from limestone slurry.
≥ 95% SO₂ Removal
Ø ≤ 5.0 m
≤ 90 °C
pH 4 – 6
Cl⁻ ≤ 50,000 ppm
FIG.02 · FGD Absorber Section View · Leeho Vina
// FGD Process Flow
Wet Limestone FGD Loop
Flue gas enters the absorber, contacts limestone slurry sprayed counter-currently, SO₂ reacts to form gypsum (CaSO₄·2H₂O), and clean gas exits through the mist eliminator.
// Component Lineup
FRP / GRP FGD Component Range
Every wetted part of a wet FGD train, supplied as a coordinated package.
01
REF · POSCO POSLX · DN 2500 × 23m H
Absorber Tower
Spray-tower body with integral mist eliminator support, spray header connections, and bottom slurry sump. Filament-wound shell + hand-laid heads. Largest delivery to date: DN 2500 × 23 m H.
DiameterØ ≤ 5.0 m
Height≤ 23 m
02
Mist Eliminator
Two-stage chevron-vane mist eliminator with FRP support beams, wash header & header piping. Removes >99% of droplets >25 µm.
Carryover< 75 mg/Nm³
ΔP< 250 Pa
03
Spray Header
FRP slurry distribution header with custom Tee/Reducer fittings & SiC ceramic spray nozzles, sized for L/G ratio of 8–14 ℓ/m³.
MaterialVE / SiC nozzle
Levels2 – 6
04
REF · AMKOR · DN 3000 GRP DUCT
Flue Gas Duct
Round, square, and rectangular FRP ducts with internal & external flange-bolted joints. External stiffening ribs for negative pressure operation. Up to DN 3000.
Diameter≤ DN 5000
Pressure± 25 kPa
05
REF · DOOSAN Nghi Son · DN 2400/1400
Slurry / Recycle Tank
Limestone slurry mix and recycle tank with agitator nozzle, level instrumentation, and bottom-slope drain. Gypsum-resistant inner barrier.
Diameter≤ DN 5000
Solids≤ 30 wt%
06
Stack Liner
FRP wet-stack liner installed inside concrete or steel chimney shell, immune to acid condensate. Eliminates the need for borosilicate or alloy lining.
DiameterØ 2.0 – 5.0 m
Height≤ 200 m
// Engineering Data
Specifications & Material Selection
| Parameter | Value / Range | Reference Std. |
|---|---|---|
| SO₂ Removal | ≥ 95% @ pH 5.5 | EPRI 8800 |
| L/G Ratio | 8 – 14 ℓ/m³ | – |
| Inlet Gas Temp | 110 – 160 °C | – |
| Sat. Operating Temp | 55 – 65 °C | – |
| Design Temp (FRP) | ≤ 90 °C continuous | ASTM C582 |
| Design Pressure | +5 / −25 kPa | ASME RTP-1 |
| pH (slurry) | 4.0 – 6.0 | – |
| Chloride limit | ≤ 50,000 ppm | – |
| Solids limit | ≤ 30 wt% | – |
| Service Life | ≥ 25 yr (design) | BS 4994 |
| Hydro Test | 1.5 × design (vessel) | ASTM D3299 |
| Barcol Hardness | ≥ 35 | ASTM D2583 |
Resin Selection by Service
Vinyl Ester (DERAKANE 411)
Mid-temp absorber body, mist eliminator wash, slurry tank · ≤ 80 °C, pH 3–10
Vinyl Ester (DERAKANE 470)
High-temp inlet duct, hot gas zones · ≤ 110 °C dry, ≤ 95 °C wet
Bisphenol-A Polyester
Cool side outlet duct, stack liner low chloride zones · ≤ 70 °C
Iso-Polyester
Slurry distribution piping, low-temp Tee/Reducer fittings · ≤ 60 °C
Reinforcement
C-glass surface veil + ECR/E-CR glass roving · chloride-resistant inner liner
Need an FGD package quote?
Send your boiler MCR, fuel sulfur content, and target SO₂ outlet, and we size your absorber and reply within 24 hours.
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