Selective Non-Catalytic Reduction (SNCR) System

Overview

At Vel Innovative Technologies Pvt Ltd, we design and supply high-performance Selective Non-Catalytic Reduction (SNCR) systems for efficient and eco-friendly Nitrogen Oxide (NOx) emission control — without the use of costly catalysts!

The SNCR system uses aqueous ammonia or urea-based solutions to react with NOx in flue gases, converting harmful pollutants into harmless nitrogen (N₂) and water vapor (H₂O).

Applications across industries

🏭 Cement Plants

⚡ Power Boilers

🔩 Steel Plants

🔥 Process Furnaces

How SNCR Works?

The SNCR process operates in a “magic window” of 850°C – 1100°C, where urea or ammonia is injected directly into flue gases. There, it reacts with NOx to form N₂ + H₂O, drastically cutting emissions.

Key Chemical Reactions

Urea:
2 NO + CO(NH₂)₂ → 2 N₂ + CO₂ + 2 H₂O

Ammonia:
4 NO + 4 NH₃ + O₂ → 4 N₂ + 6 H₂O

No catalyst = lower costs + simple setup!

Key Features

No Catalyst Required – Lower capital and maintenance costs
Compatible with Ammonia or Urea Injection
Efficient NOx Reduction (up to 70%)
Flexible for Retrofit and Greenfield Projects
Custom-Designed for Any Capacity or MW Rating
Fully Automated Control Systems with Real-Time Monitoring
Low Space Requirements and Easy Installation

Benefits

Cost-Effective Compliance: SNCR avoids expensive catalyst replacement.
Environmentally Friendly: Reduces NOx, a major contributor to acid rain and smog.
Adaptable Across Industries: Ideal for large industrial boilers and furnaces.
Low Maintenance: Fewer moving parts and no catalyst degradation.
Scalable Design: Suitable for small to large combustion systems.

Our Scope

Vel Innovative Technologies Pvt Ltd provides complete Engineering and Supply of SNCR Systems, including:

Process Design and CFD Simulations (if client insists)
Detailed Engineering & Documentation
Fabrication and Supply of whole system including unloading and Injection Skid
Control Systems and Instrumentation
Reagent Storage & Handling Systems
Performance Validation and Commissioning Support

Technical Specifications

Parameter	Specification
Reagents	Aqueous Ammonia / Urea
Operating Temperature	850°C – 1100°C
Reduction Efficiency	Up to 70% – 80% NOx removal
Reagent Injection System	Multi-point / lance-based
Control System	PLC/DCS integrated with temperature and NOx sensors
System Capacity	Designed for any MW setups
Compliance	CPCB/CEA/Local Environmental Norms