Selective Catalytic Reduction System for Coal Boiler – Clean‑Burn Technology
Our selective catalytic reduction (SCR) system for coal boiler installations delivers reliable NOx control while preserving boiler efficiency. Engineered for large‑scale power plants and industrial heating facilities, the solution integrates seamlessly with existing combustion equipment, converting nitrogen oxides into harmless nitrogen and water through ammonia‑based catalysis.
How the Process Works
The SCR unit injects a precisely metered amount of anhydrous ammonia into the flue gas stream downstream of the boiler’s primary combustion zone. The gas mixture then passes over a high‑temperature catalyst (typically a vanadium‑titanium‑tungsten formulation). Within seconds, the catalyst promotes the reduction reaction: 4NO + 4NH₃ + O₂ → 4N₂ + 6H₂O. By operating at 300–400 °C, the system achieves up to 95 % NOx removal without a noticeable pressure drop, ensuring that the boiler’s heat‑transfer performance remains unchanged.
Key Benefits & Features
- High NOx Reduction Efficiency – Consistently 85–95 % removal across a wide load range.
- Robust Catalyst Design – Engineered for continuous operation under coal‑derived flue gas conditions, with resistance to sulfur poisoning.
- Flexible Integration – Modular ducting and plug‑and‑play control panels allow retrofit on existing coal‑fired units with minimal civil work.
- Optimized Ammonia Usage – Real‑time feedback control reduces reagent consumption by up to 20 % versus conventional systems.
- Extended Service Life – Certified for 24 000 h continuous operation before catalyst regeneration is required.
Typical Specifications (customizable per order)
| Parameter | Standard Range | Units |
|---|---|---|
| Design Capacity (NOx removal) | 150–1 200 | kg/h |
| Operating Temperature | 300–420 | °C |
| Ammonia Slip | ≤10 | ppm (dry basis) |
| Pressure Drop | ≤0.12 | bar |
| Control Interface | PLC‑compatible, HMI optional | – |
Application Scenarios
The system is suitable for a range of coal‑fired installations, including:
- Utility‑scale power stations (200–1 200 MW) requiring compliance with EU Industrial Emissions Directive (IED) or U.S. EPA 45Q.
- Industrial steam generators in steel, cement, and chemical plants where continuous operation and low‑maintenance are critical.
- Retrofit projects for older coal boilers where space constraints demand a compact catalyst housing.
Industry Certifications & Safety
All units are manufactured in ISO 9001‑certified facilities and meet the following standards:
- IEC 60079‑10 (Explosion protection for gas‑filled equipment).
- EN ISO 14001 (Environmental management).
- Compliance with EPA 40 CFR Part 60 Subpart D (NOx emission limits).
- CE marking for equipment placed on the European market.
FAQ
What is the minimum order quantity (MOQ) for a custom SCR unit?
Our standard MOQ is one complete system, which includes catalyst module, ductwork, and control package. For OEM partners we can discuss batch production thresholds as low as 5 units.
Can the system be tailored to specific flue‑gas compositions?
Yes. We offer catalyst formulations and injection strategies optimized for high‑sulfur coal, low‑ash ash, or blended fuels. Engineering support is provided during the design phase to match your gas chemistry.
What is the typical lead time from order to shipment?
Standard lead time ranges from 15 to 45 days, depending on configuration complexity and catalyst availability. Expedited production can be arranged with a 10‑day surcharge.
What warranty and after‑sales support are provided?
All units carry a 24‑month parts‑only warranty, with optional extended service contracts that include on‑site catalyst regeneration, spare‑part logistics, and 24/7 technical hotline.
Ready to Reduce NOx Emissions on Your Coal Boiler?
Contact our engineering team today to discuss system sizing, integration details, and pricing. A single inquiry triggers a detailed technical proposal within 48 hours.