Journal of Engineering Sciences

Author(s): Bezhan V. A.¹, Zhytarenko V. M.¹, Dalakov P.²

Affiliation(s): 
¹ Pryazovskyi State Technical University, 7 Universytets’ka St., 87555 Mariupol, Ukraine;
² Cryotec Anlagenbau GmbH, 76 Dresdener St., 04808 Wurzen, Germany

^*Corresponding Author’s Address: [email protected]

Issue: Volume 7, Issue 2 (2020)

Dates:
Paper received: March 20, 2020
The final version of the paper received: August 17, 2020
Paper accepted online: August 31, 2020

Citation:
Bezhan, V. A., Zhytarenko, V. M., Dalakov, P. (2020). Energy characteristics of medium pressure steam boilers. Journal of Engineering Sciences, Vol. 7(2), pp. F8–F14, doi: 10.21272/jes.2020.7(2).f2

DOI: 10.21272/jes.2020.7(2).f2

Research Area:  CHEMICAL ENGINEERING: Processes in Machines and Devices

Abstract. The object of this study is the thermal and energy characteristics of medium pressure boilers of СНPP-1, four boilers CKTI-75/39F-2-4 and two boilers TP-150-2. All boilers operate on a common steam collector of 32 atm, at 420 °С. Fuel is a mixture of blast furnace gas and natural gas in the ratio of 0.7-0.9 volume particles. The characteristics of the blast furnace gas are not constant: the elemental composition, humidity, and dustiness of blast furnace gas change significantly. Analysis of operation of CHPP-1 medium pressure boilers of OJSC “Mariupol Metallurgical Combinat named after P. G. Ilyich” was carried out on the basis of the technical documentation and materials obtained during the ecological and thermal-technical tests of the boilers CKTI-75/39F-2-4 No. 7–9, and TP-150 No. 11, 12 of SU “Promavtomatika”. The main purpose of the analysis is to identify patterns that affect the operational characteristics of boilers, especially the efficiency. The analysis revealed the nature of the overall dependence of the efficiency on the load, as well as the dependence of the efficiency of the boilers on the load at different thermal parts of the blast furnace gas. After carrying out the balance tests, the dependencies of the exhaust gas temperature on the boiler load at different thermal parts of the blast furnace gas were established.

Keywords: medium pressure boiler, thermal efficiency, blast furnace gas, heat losses.

References:

1. Danilin, E. A., Klochkov, V. N. (1988). Control of Fuel Combustion in Industrial Boiler Plants. Technika, Kyiv, Ukraine.
2. Madejski, P., Janda, T., Modlinski, N., Nabaglo, D. (2016). A combustion process optimization and numerical analysis for the low emission operation of pulverized coal-fired boiler. Developments in Combustion Technology, pp. 33–76, doi: 10.5772/64442.
3. Da Silva, C. V., Indrusiak, M. L., Beskow, A. B. (2010). CFD analysis of the pulverized coal combustion processes in a 160 MWe tangentially-fired-boiler of a thermal power plant. Journal of the Brazilian Society of Mechanical Sciences and Engineering, Vol. 32(4), pp. 427–436.
4. Gurel,B., Ipek, O., Kan, M. (2015). Numerical analysis of pulverised coal fired boiler with different burner geometries. Special issue of the International Conference on Computational and Experimental Science and Engineering (ICCESEN 2014), Vol. 128(2-B), pp. B-43–B-45, doi: 10.12693/APhysPolA.128.B-43.
5. Mehdizadeh, H., Alishah, A., Astani, S. H. (2016). Study on performance and methods to optimize thermal oil boiler efficiency in cement industry. Energy Equipment and Systems, Vol. 4(1), pp. 53–64.
6. Gomez, A., Fueyo, N., Diez, L. I. (2008). Modelling and simulation of fluid-flow and heat transfer in the convective zone of a power-generation boiler. Applied Thermal Engineering, Elsevier, Vol. 28 (5-6), pp. 532–546, doi: 10.1016/j.applthermaleng.2007.04.019.
7. Zhang, Y., Li, Q., Zhou, H. (2016). Chapter 5 – Heat transfer calculation in furnaces. Theory and Calculation of Heat Transfer in Furnaces, pp. 131–172, doi: 10.1016/B978-0-12-800966-6.00005-3.
8. Kilian, L. G., Steuer, L. H. (2011). Modeling of gas-particle-flow and heat radiation in steam power plants. Proceedings 8th Modelica Conference, Dresden, Germany, March 20–22, 2011, pp. 610–615.
9. Dong, J., Zhou, T., Wu, X., Zhang, J., Fan, H., Zhang, Z. (2018). Coupled heat transfer simulation of the spiral water wall in a double reheat ultra-supercritical boiler. Journal of Thermal Science, Vol. 27, pp. 592–601, doi: 10.1007/s11630-018-1072-6.
10. Redko, A., Dzhyoiev, R., Davidenko, A. M., Pavlovskaya, A. A., Pavlovskiy, S., Redko, I., Kulikova, N., Redko, O. (2019). Aerodynamic processes and heat exchange in the furnace of a steam boiler with a secondary emitter. Alexandria Engineering Journal, 58(1), pp. 89–101, doi: 10.1016/j.aej.2018.12.006.
11. Rahmani, A. (2014). Numerical investigation of heat transfer in 4-pass fire-tube boiler. American Journal of Chemical Engineering, Vol 2, pp 65–70, doi: 10.11648/j.ajche.20140205.12.

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