Selective non-catalytic reduction of nitrogen oxides in the production of iron ore pellets
/ 0
- Details
- Category: Content №1 2022
- Last Updated on 25 February 2022
- Published on 30 November -0001
- Hits: 3751
Authors:
I.Volchyn, orcid.org/0000-0002-5388-4984, Thermal Energy Technology Institute of the NAS of Ukraine, Kyiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
S.Kryvosheiev, orcid.org/0000-0003-3327-983X, Thermal Energy Technology Institute of the NAS of Ukraine, Kyiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A.Yasynetskyi, orcid.org/0000-0001-9591-3651, Thermal Energy Technology Institute of the NAS of Ukraine, Kyiv, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A.Zaitsev, FZ Solution, Kyiv, Ukraine
O.Samchenko, FZ Solution, Kyiv, Ukraine
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2022, (1): 088 - 094
https://doi.org/10.33271/nvngu/2022-1/088
Abstract:
Purpose. Using mathematical modeling, to assess the feasibility of introducing a Selective Non-Catalytic Reduction (SNCR) system as a measure to reduce nitrogen oxide emissions from the production of iron ore pellets. To determine the peculiarities of using ammonia solution and urea solution as reagents for the SNCR process, the influence of the injection of these reagents on the temperature regime during iron pellet production, as well as assess the expected efficiency of the SNCR method for purification of exhaust gases from nitrogen oxides.
Methodology. The research results have been obtained using CFD-modeling in the ANSYS Fluent software package. To model this process, a computational domain is constructed, which corresponds in size to the preheating zone (PRE zone) of the actual iron pellet production plant. Two series of calculations are performed for this domain: the first, without adding a reagent, and the second, with a urea solution as a reagent for the SNCR system.
Findings. For the first series of calculations, the temperature field and the pressure field in the computational domain is obtained. Experimental research makes it possible to assert that the physical conditions of the mathematical model are close to those at a real plant for the production of pellets. In the second series of calculations, the temperature field in the computational domain is obtained and the influence of the reagent injection of the SNCR system is determined, namely, the temperature decrease in the PRE zone of the pellet production plant by 1025 . The expected efficiency of reduction of nitrogen oxides using a 50% urea solution is about 60%.
Originality. It has been revealed that the process of urea solution evaporation is intense, which accelerates the beginning of urea decomposition and, accordingly, the reduction reaction of nitrogen oxides. The temperature drop in the zone of moisture evaporation does not exceed 1025 C. The reagent injection (50% urea solution) with a consumption of 219 kg/h does not significantly affect the temperature regime in the PRE zone. Modeling the chemical reactions of the SNCR process with the injection of 50% urea solution droplets through lances into the PRE zone chamber indicates a 60% reduction in nitrogen oxide emissions.
Practical value. The introduction of the SNCR system at pellet production plant can reduce nitrogen oxide emissions, which will have a positive impact on the environmental situation in metallurgical regions.
Keywords: iron ore pellets, selective non-catalytic reduction, nitrogen oxides, denitrification, exhaust gases
References.
1. Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions. Pathway to a Healthy Planet for All EU Action Plan: Towards Zero Pollution for Air, Water and Soil Brussels (2021). Retrieved from https://ec.europa.eu/environment/pdf/zero-pollution-action-plan/communication_en.pdf.
2. Annexes to the Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions. Pathway to a Healthy Planet for All EU Action Plan: Towards Zero Pollution for Air, Water and Soil. Brussels (2021). Retrieved from https://ec.europa.eu/environment /pdf/zero-pollution-action-plan/annexes_en.pdf.
3. Directive (EU) 2010/75 of the European Parliament and of the Council of 24 November 2010 on industrial emissions (integrated pollution prevention and control) (Recast) (2010). Official Journal of the European Union, L 334, 17-119. Retrieved from https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELE X:32010L0075&from=EN.
4. Directive (EU) 2016/2284 of the European Parliament and of the Council of 14 December 2016 on the reduction of national emissions of certain atmospheric pollutants, amending Directive 2003/35/EC and repealing Directive 2001/81/EC (2016). Official Journal of the European Union, L 344, 1-31. Retrieved from https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELE X:32016L2284&from=EN.
5. Iavarone, S., & Parente, A. (2020). NOx Formation in MILD Combustion: Potential and Limitations of Existing Approaches in CFD Frontiers in Mechanical Engineering, 6(13). https://doi.org/10.3389/fmech.2020.00013.
6. Glarborg, P., Miller, J.A., Ruscic, B., & Klippenstein, S.J. (2018). Modeling nitrogen chemistry in combustion. Progress in Energy and Combustion Science, 67, 31-68. https://doi.org/10.1016/j.pecs.2018.01.002.
7. Miller, B.G. (2017). Formation and control of nitrogen oxides. Chapter 10. In Clean Coal Engineering Technology (2nd ed.). Elsevier. https://doi.org/10.1016/B978-0-12-811365-3.00010-7.
8. Pronobis, M. (2020). Reduction of nitrogen oxide emissions. Chapter 4. In Environmentally Oriented Modernization of Power Boilers. Elsevier. https://doi.org/10.1016/B978-0-12-819921-3.00004-2.
9. Verkhovna Rada of Ukraine. Legislation of Ukraine (n.d.). Order of the Ministry of Environmental Protection of Ukraine dated 27.06.2006. No. 309. On approval of standards of maximum permissible emissions of pollutants from stationary sources. Retrieved from https://zakon.rada.gov.ua/laws/show/z0912-06#Text.
10. Verkhovna Rada of Ukraine. Legislation of Ukraine (n.d.). Order of the Ministry of Ecology and Natural Resources of Ukraine dated February 16, 2018. No. 62 On Amendments to the Order of the Ministry of Environment dated October 22, 2008. No. 541. Retrieved from https://zakon.rada.gov.ua/laws/show/z0290-18#Text.
11. Thierry Lecomte, Jos Flix Ferrera de la Fuente, Frederik Neuwahl, Michele Canova, Antoine Pinasseau, Ivan Jankov ,, & Luis Delgado Sancho (2017). Best Available Techniques (BAT) Reference Document for Large Combustion Plants; EUR 28836 EN. https://doi.org/10.2760/949.
12. Rainer Remus, Miguel A. Aguado-Monsonet, Serge Roudier, & Luis Delgado Sancho (2013). Best Available Techniques (BAT) Reference Document for Iron and Steel Production. EUR 25521 EN. https://doi.org/10.2791/98516.
13. Nomura, T., Yamamoto, N., Fujii, T., & Takiguchi, Y. (2015). Beneficiation Plants and Pelletizing Plants for Utilizing Low Grade Iron Ore. Kobelco Technology Review, (33), 8-15. Retrieved from https://www.kobelco.co.jp/english/ktr/pdf/ktr_33/008-015.pdf.
14. Burstrm, P.E.C., Lundstrm, T.S., Marjavaara, B.D., & Tyr,S. (2010). CFD-modelling of Selective Non-Catalytic Reduction of NOx in grate-kiln plants. Progress in Computational Fluid Dynamics, 10(5/6), 284-291. https://doi.org/10.1504/PCFD.2010.035361.
15. John L. Sorrels, David D. Randall, Carrie Richardson Fry, & Karen S. Schaffner (2019). Chapter 1. Selective Noncatalytic Reduction. US EPA. Retrieved from https://www.epa.gov/sites/production/files/2017-12/documents/sncrcostmanualchapter7thedition20162017revisions.pdf.
16. Blejcha, T., Konvika, J., von der Heide, B., Mal, R., & Maier,M. (2018). High Temperature Modification of SNCR Technology and its Impact on NOx Removal Process. EPJ Web of Conferences, 180, 02009. https://doi.org/10.1051/epjconf/201818002009.
17. von der Heide, Bernd (2010). Advanced SNCR Technology for Coal Fired Boilers 200 MWel in Germany and 225 MWel in Poland. Power-Gen Europe, Amsterdam. Retrieved from https://www.ms-umwelt.de/wp-content/uploads/2020/08/2010.06-PG-Europe_Amsterdam-Advanced-SNCR-Technology-for-Coal-Fired-Boilers-200-MWel-in-Germany-and-225-MWel-in-Poland.pdf.
Newer news items:
- Development of creative entrepreneurship in Ukrainian technical universities - 25/02/2022 15:02
- Financial and economic narratives for evaluation of innovative potential of enterprises - 25/02/2022 15:02
- Trends of development of financial and economic activity of entrepreneurial structures during the period of quarantine restrictions - 25/02/2022 15:02
- Model approach to estimating the cost of transfer of integral intangible system (technology) - 25/02/2022 15:02
- Cultural economics: the role of higher education institution in shaping the value systems - 25/02/2022 15:02
- Modeling of manipulator grip reaches with regard to generalized coordinate constraints - 25/02/2022 15:02
- Integrated improvement of the efficiency of computer control system of spatial orientation settings of drilling facilities - 25/02/2022 15:02
- Hazard mapping as a fundamental element of OSH management systems currently used in the mining sector - 25/02/2022 15:02
- Determination of tightness of the filtering half-mask adhesion to a user’s face - 25/02/2022 15:02
- Early determination and evaluation of technogenic risks within the water purification systems of TSs and TPSs - 25/02/2022 15:02
Older news items:
- Mechanism of protecting forest and land resources of Ukraine from illegal amber mining: legal aspect - 25/02/2022 15:02
- Substantiation of the green approach in the formation of a sustainable system of ecological logistics - 25/02/2022 15:02
- Defining the level of human comfort in the office environment by thermal factor - 25/02/2022 15:02
- Lubricants for rail transport liquid (plastic) for friction pair “wheel – rail” - 25/02/2022 15:02
- Disclosure of state uncertainty of the roller chain based on cross-correlation - 25/02/2022 15:02
- Feasibility study for using the fillers in the bearing structure components of a gondola car - 25/02/2022 15:02
- Beneficiation properties of ash-and-slag dumps - 25/02/2022 15:02
- Numerical studies on thermochemical processing of peat in a fixed layer - 25/02/2022 15:02
- Estimation of glass lubricant viscosity for hot extrusion of Cr-Ni steel and Ni alloy tubes - 25/02/2022 15:02
- Assessment of sudden soil faults hazard when developing a coal seam - 25/02/2022 15:02
Archive