Denitrification, SNCR systems
Denitrification, SNCR systems
Key Takeaways
- SNCR systems reduce nitrogen oxides (NOx) in thermal processes efficiently and cost-effectively through selective non-catalytic reduction.
- Dynamic load changes, changing fuel qualities and stricter emission limits require intelligent and adaptive control systems.
- The CONENGA Group develops intelligent SNCR control systems with soft sensors, predictive NOx emission control and dynamic setpoint tracking.
- Through the intelligent coupling of firing rate control and SNCR technology, the CONENGA Group increases the separation efficiency, operational safety and cost-effectiveness of existing systems.
- CONENGA supplies turnkey SNCR systems including engineering, commissioning, continuous process monitoring and long-term service.
The CONENGA Group optimizes SNCR systems through intelligent control, soft sensors and predictive NOx emission control
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Reliable & efficient: SNCR systems from CONENGA
An SNCR (Selective Non-Catalytic Reduction) system is a process for reducing nitrogen oxides (NOx) in flue gases from thermal systems. Reducing agents such as urea or ammonia water are specifically introduced into the hot flue gas flow in order to chemically convert NOx into nitrogen and water. The CONENGA Group develops customized SNCR systems with intelligent control and integrates them into existing combustion and process plants.
The SNCR process allows nitrogen oxides (NOx) to be removed from the exhaust gas efficiently and cost-effectively. Thanks to our many years of expertise in process and control technology, we can optimally design the SNCR technology for your system – and achieve a NOx reduction of up to 80 %.
Changing fuel qualities, dynamic load changes and stricter emission limits are a challenge for every combustion plant operator.
The SNCR control system developed by CONENGA ensures that your system reacts optimally to these changes at all times and achieves the highest NOx separation efficiency. Thanks to selective lance control, predictive NOx emission control, the use of soft sensors and dynamic NOx setpoint tracking, the emission limits are reliably complied with and operating costs are sustainably reduced.
Predictive NOx emission control
NOx emissions are only measured at the stack with a long delay – this often leads to inefficient dosing of the reducing agent. Our control system calculates the NOx value in real time based on relevant process parameters and thus optimizes the amount of reducing agent in advance.
Soft sensor for maximum separation efficiency
The optimum temperature window for the SNCR reaction shifts depending on the fuel and operating status. CONENGA’s soft sensor evaluates the efficiency of each individual nozzle lance and distributes the reducing agent specifically to where it has the best effect.
Dynamic NOx setpoint tracking
Process-related short-term emission peaks can cause limit values to be exceeded. Our intelligent control system reacts immediately, dynamically adjusts the NOx setpoint and ensures that the statutory half-hourly and daily limit values are always safely complied with.
System refit and optimization
Older firing and SNCR systems often no longer meet the stricter emission requirements. With the higher-level control concepts for SNCR and firing systems developed by CONENGA, we can make your system fit for the future again. We get the most out of your system with an intelligent combination of firing rate and SNCR control.
High reliability for safe emission compliance
Depending on the type of firing system and fuel used, an SNCR system is essential for compliance with statutory or official emission limits – which is why reliability and robustness are our top priorities. We only design durable systems that have proven themselves in practice over many years.
Continuous process monitoring
Our control technology solution integrates seamlessly into existing OT systems and enables continuous process monitoring thanks to a secure data connection via IT. Deviations and potential faults are detected at an early stage, and unexpected downtimes and operating resources are minimized. This leads to a long, worry-free service life for the system.
From a single source – turnkey SNCR systems from CONENGA
With the CONENGA Group’s intelligent SNCR control system and our many years of process engineering expertise, we supply complete turnkey SNCR systems for grate firing, fluidized bed firing and rotary kiln systems as well as special processes from various industrial sectors.
- Complete turnkey solutions with CE marking – fewer project risks thanks to clear cost, time and quality control.
- Regulatory support included – we assist you with approval procedures, risk assessments and legal requirements.
Our services in detail:
Compliance with current and future emission limits is essential. We know what is important and analyze your circumstances: existing plant technology, the combustion process based on current process data, as well as the space available at the site – simply all the requirements and framework conditions to optimally configure the SNCR system. The performance limits are then precisely defined to avoid any surprises later on. This leads to the schedule and pricing for implementation. The result of the conception phase is a resilient concept for your custom-fit SNCR – clear in terms of technical, economic and scheduling aspects, as a decision-making basis for implementation.
From engineering to commissioning with detailed training, CONENGA Group provides you with everything from a single source. As experienced technology experts, we work with tried and tested partners to supply the complete SNCR system as a tailor-made product at a fixed price. Of course, CE for the overall performance delivered is just as much a matter of course as support with approval and testing procedures. We use our own proven digital technology in the control and connection so that the data on the system and
on the operating states are available in a simple and user-friendly visualization. All in all, we thus live up to our claim of supplying the SNCR as a “turnkey” product.
We support your interest in the economical operation and long-term value retention of your SNCR system and are available to you as a service partner throughout its service life. Coordinated with your own capacities, we support you in maintaining optimal operation. The basis for this is the
service and maintenance plan for the SNCR, which is included as a service component. Thanks to the integrated process monitoring, ongoing optimizations and adjustments to changing conditions, such as fuel changes or system modifications, can be made. The consumption of reducing agent is continuously
kept at the lowest possible level and changes and faults
are detected at an early stage. We contribute our extensive know-how on combustion technologies (grate firing, fluidized bed, rotary kiln) and the corresponding process engineering. Your plant remains “state of the art”.
The advantages of the SNCR process over the SCR process at a glance:
Key data for CONENGA SNCR systems:
| Reducing agent | Urea or ammonia water |
|---|---|
| Amount of reducing agent | 2 – 800 l/h |
| Separation efficiency | up to 80% |
| Number of nozzle | lances1 to 8 |
| NH3 slip | < 10 mg/Nm³ |
Customer testimonial:
“As part of the upgrade of our fluidized bed boiler by the experts from CONENGA, an SNCR system was also integrated. This not only enables us to stay below the emission limits, it is also stable and reliable in operation after more than a year of use. The SNCR control system was implemented as part of the integrated EPOC suite.”
DI (FH) Bernhard Pichler, Project Manager, NORSKE SKOG
You can download our product sheet on SNCR systems here
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