The application of RANS CFD for design of SNCR technology for a pulverized coal-fired boiler

The article describes the technology of NO_x emission abatement by SNCR method. The scope of research included CDF simulations as well as design and construction of the pilot plant and tests of NO_x reduction by urea in the plant located in industrial pulverized-coal fired boiler. The key step of research was to determine the appropriate temperature window for the SNCR process. The proposed solution of the location of injection lances in the combustion chamber enabled to achieve over a 30% reduction of NO_x. It is possible to achieve higher effectiveness of the proposed SNCR technology and meet the required emission standards via providing prior reduction of NO_x to the level of 350 mg/um³ using the primary methods.