Denitrification, SNCR systems

With the selective non-catalytic reaction (SNCR), nitrogen oxides (Nox), which are produced in all industrial combustion processes, can be reliably removed from the exhaust gas. Our many years of expertise in the field of process and control engineering helps us to optimally design the SNCR process for your plant. design and more more than
80 % of the NOx-emissions from the exhaust gas. This allows legal NOx-limits are reliably adhered towhich an important contribution for to our environment.

Dhe SNCR method represents is a cost-effective solution that can be easily integrated into existing systems. The investment costs for the SNCR process are only approx. 10-20 % of the costs of an SCR process. of an SCR process. We also analyze and optimize existing SNCR systems and support you in the saving of reducing agents (urea/ammonia)in order to the operating costsminimize operating costs.
Our goal is to the technically and economically best possible solution for your plant to meet the current and future NOx-emission limits with minimum consumption of reducing agent reliably.

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The advantages of the SNCRprocedure at a glance:

  • High efficiency (more than 80 % NOx capture efficiency possible)
  • Low investment costs (up to 10 times lower than an SCRprocess)
  • Low operating costs (no additional pressure loss in the exhaust gas flow, no reheating of the exhaust gas necessary)
  • Quick and easy to retrofit to existing systems
  • Less space required compared to the SCRprocess

Our services in detail:

High efficiency
Low investment costs
Low operating costs
of components that are to be replaced or used for the first time, and to maintain a high level of operational safety
Quick and easy to retrofit
Low space requirement

Customer testimonial:

“As part of the upgrade of our fluidized bed boiler by the experts from VOIGT+WIPP Engineers, an SNCR system was also integrated. This not only enables the emission limits to be undercut, it also proves to be 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

Logo Norske Skog
As a reducing agent for the SNCR process, which is injected into the furnace via specially developed nozzles injected is, either ammonia or urea solution can be used. In order to efficiently remove nitrogen oxides from the exhaust gas, the right temperature window, sufficient dwell time and optimum distribution of the reducing agent are particularly important. s in the exhaust gas is crucial. The efficiency of the SNCR system is largely determined by the choice of reducing agent, t he position of the insertion, the even distribution in the exhaust gas flow and the control of the combustion process. If combustion chamber temperatures are too low or the distribution of reducing agent is insufficient, emissions of unconverted ammonia may occur (NH3 slip); if temperatures are too high, emissions of unconverted ammonia may occur (NH3 slip). combustion chamber temperatures, the injected ammonia to NOx.
Nachdem die Feuerraumtemperatur hauptsächlich von der Regelung des Verbrennungsprozess
it If the efficiency of the firing rate control and the SNCR system work together correctly, an optimum result can be achieved in terms of efficiency. In addition to the SNCR process, it is also possible in many cases to use the NOx-emissions by optimizing the firing rate control. If this has aroused your interest, you will find
further information about our product ” EPOC boiler for optimizing the firing rate control here.

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