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SNCR (selective non-catalytic reduction) is a post-combustion emissions control technique that reduces NOx by injecting an ammonia-type reactant into the boiler at a predetermined spot.
The Global Selective Non-Catalytic Reduction (SNCR) System market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
Design and Test of a Selective Non Catalytic Reduction (SNCR) System for Full-Scale Refinery CO Boilers To Achieve High NOx Removal.
A number of industrial combustion systems produce NOx emissions, and selective non catalytic reduction technology (SNCR) is an efficient and affordable way to reduce these emissions.
It is well known that the SNCR process works best in a small temperature range, between 900 and 1000 °C, and that high CO concentrations can both change the temperature range and reduce the process’ efficiency.
The implementation of SNCR technology on an industrial or refinery boiler presents special challenges due to these boiler designs and fuels fired, whereas the application of SNCR on a utility boiler is challenging due to a number of factors that can have adverse effects on SNCR NOx reduction performance.
The development and evaluation of SNCR technology on two CO boilers in refineries. The work that was presented included optimisation testing, baseline testing, process analysis, and computational fluid dynamics (CFD) simulations.
For the boiler, a three-dimensional full-scale CFD model was built and calibrated using baseline test data to mimic the flow characteristics, temperature profile, and distribution of oxygen and combustibles.
A reagent injection system that produced a quick and efficient distribution of the reagent in the boiler’s flue gas was designed and optimised using the CFD model.
The decreased SNCR chemistry-based CFD model was also used to forecast the effectiveness of NOx reduction and ammonia slip. A set of parametric optimisation tests were carried out on both units once the SNCR system had been installed and put into service.
The final performance tests demonstrated that, with a nitrogen stoichiometric ratio (NSR) of 1.5, the use of SNCR technology may cut NOx emissions by at least with less than 5 ppm of ammonia slip.
