SCR denitrification reactor installed on a boiler flue gas duct

Flue Gas Desulfurization & Denitrification

SCR / SNCR Denitrification System

GP-SCR Series

Selective catalytic and non-catalytic reduction systems for NOx reduction in boilers, kilns and sintering flue gas.

Flue gas volume: 20,000 - 900,000 m³/h
Inlet NOx: ≤ 1,200 mg/Nm³
Denitrification efficiency: SCR 80 - 95%, SNCR 30 - 60%
Reaction temperature: SCR 280 - 420 °C, SNCR 850 - 1,100 °C

Data needed for an accurate quotation

Air or gas volume at operating temperature
Dust or pollutant type and concentration
Required outlet concentration or standard
Available plot size and power supply

Technical parameters

Grouped specification sheet

Technical parameters
Performance
Flue gas volume	20,000 - 900,000 m³/h
Inlet NOx	≤ 1,200 mg/Nm³
Ammonia slip	≤ 3 mg/Nm³ with proper injection control
Catalyst life	16,000 - 24,000 h under rated condition
Structure
Layout	High dust, low dust or tail gas arrangement
Catalyst	Honeycomb V2O5-WO3/TiO2, 2 - 4 layers
Reducer	Urea solution or ammonia water with vaporiser
Injection	Static mixer plus multi-nozzle grid with flow field tuning

Values shown are the standard manufacturing range. Final parameters are calculated from your gas volume, dust or pollutant load, temperature and the emission standard in force at your site.

Customisation options

Catalyst volume and layer number
Urea or ammonia water dosing system
Low temperature catalyst with gas reheating
Flow field CFD optimisation and mixer design

Export packing & delivery

Catalyst modules in wooden cases with moisture barrier
Reactor sections shipped modularly

Drawings, assembly sequence, manual and test records are supplied with every shipment. On-site engineer dispatch can be arranged for complete system projects.

Read the export and installation checklist

Matched equipment

Systems usually supplied together

Collector, fan, discharge valve and conveying equipment designed as one train so interfaces and spares stay consistent.

Flue Gas Desulfurization & Denitrification

Wet Flue Gas Desulfurization System

GP-FGD Series

Limestone-gypsum and sodium alkali wet desulfurization towers for coal fired boilers, sintering machines and industrial kilns.

Flue gas volume: 30,000 - 1,200,000 m³/h
Inlet SO₂: ≤ 8,000 mg/Nm³
Desulfurization efficiency: 90 - 98% (project dependent)
Absorbent: Limestone, lime, sodium alkali, ammonia

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Flue Gas Desulfurization & Denitrification

Integrated Desulfurization & Denitrification System

GP-ULE Series

Combined dust removal, desulfurization, denitrification and wet electrostatic polishing for ultra-low emission retrofits.

Scope: Dedusting + FGD + DeNOx + wet ESP
Flue gas volume: 50,000 - 1,000,000 m³/h
Outlet targets: Per local ultra-low emission limit
Control: Integrated DCS with CEMS interface

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Industrial Dust Collection

Wide-Spacing Electrostatic Precipitator

GP-CDPK / GP-WESP Series

Dry and wet electrostatic precipitators for fine dust, mist and aerosol where low resistance and stable outlet concentration matter.

Air volume: 20,000 - 800,000 m³/h
Collecting area: 50 - 9,000 m²
Outlet concentration: ≤ 20 mg/Nm³ (dry), ≤ 10 mg/Nm³ (wet)
Resistance: 200 - 400 Pa

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Selection notes for this equipment

All articles

Flue Gas Treatment2026-05-309 min read

Flue Gas Desulfurization and Denitrification: Process Routes Explained

Wet, semi-dry and dry FGD compared with SCR and SNCR denitrification, including temperature window, reagent use, by-products and retrofit constraints.

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