SNCR Systems – Optimised Design for Spray Technology
NOx reduction based on process engineering and spray technology.
Stilworx designs and supplies SNCR systems for industrial applications, particularly for boilers and combustion plants, where NOx reduction requires high precision in injection and reagent–gas interaction.
Solutions are developed for new installations and retrofit, especially in contexts where process data is limited or operating conditions are variable.
Approach Based on Real Measurements
In SNCR applications, the available data is often incomplete or not representative of actual plant operation. For this reason, Stilworx adopts an approach based on direct field measurements:
- Temperature profile survey using probes inserted into the boiler
- Analysis of actual operating conditions
- Feasibility study based on measured data
When necessary, solutions are validated through field tests with manual injection systems, to verify performance before final implementation.
How Can We Concretely Help You?
Stilworx supplies SNCR systems designed to:
- Reduce NOx emissions through urea or ammonia injection
- Operate within the correct temperature window
- Ensure stable performance under variable conditions
- Optimise existing systems through targeted retrofit
Efficiency, Control and Reliability
From design to commissioning, we develop solutions designed to optimize system performance and adapt to actual process conditions.
In SNCR applications, spray quality and reagent–gas interaction are critical for performance. Design is based on: temperature profile and its variability, residence time and reaction window, gas flow distribution, droplet size, velocity, and evaporation, lance position and orientation. Spray design is the central element of the system.
SNCR systems are designed to ensure: rapid reagent evaporation, uniform distribution in the gas stream, adequate penetration, minimisation of ammonia slip.
Lance configuration and atomisation technology are selected based on actual process conditions.
To manage variable loads and non-uniform temperature profiles, Stilworx SNCR systems can feature multiple injection levels. This enables: operation within the optimal temperature window across the full operating range, greater NOx reduction efficiency, high operational flexibility.
Control systems are designed to balance NOx reduction with process stability. Strategies include: reagent flow modulation, adaptive injection level activation, integration with existing automation systems. The objective is to minimise ammonia slip while maintaining consistent performance.
Stilworx supports interventions on existing systems, including: replacement of ineffective injection systems, redesign of spray layouts, improvement of control logic, performance optimisation in operation.
SNCR systems can be supplied as: complete packages, dosing skids and injection lances, retrofit solutions. Stilworx supports installation and commissioning to ensure reliable performance and correct integration.
Do you have a new system to develop or an existing one to upgrade?
The Stilworx engineering team can assist with the technical evaluation of the process and the identification of the most suitable solution.