DOI: 10.52150/2522-9117-2024-38-741-752
Mykhailovskyi Mykola Volodymyrovych, Ph. D. (Tech.), Associate Professor, Ukrainian State University of Science and Technologies, Lazariana St., 2, Ukraine, Dnipro, 49010. ORCID: 0000-0002-9960-6189. E-mail: m.v.myhaylovski@ust.edu.ua
Gupalo Olena Viacheslavivna, Ph. D. (Tech.), Associate Professor, Ukrainian State University of Science and Technologies, Lazariana St., 2, Dnipro, 49010, Ukraine. ORCID: 0000-0003-3145-9220. E-mail: gupaloelena@gmail.com
Yehorov Oleksandr Petrovych, Ph. D. (Tech.), Associate Professor, Ukrainian State University of Science and Technologies, Lazariana St., 2, Ukraine, Dnipro, 49010. ORCID: 0000-0002-9867-0437. E-mail: o.p.egorov@ust.edu.ua
Shybakinskyi Volodymyr Ivanovych, Ph. D. (Tech.), Associate Professor, Ukrainian State University of Science and Technologies, Lazariana St., 2, Ukraine, Dnipro, 49010. ORCID: 0009-0003-4387-8315. E-mail: v.i.shibakinsky@ust.edu.ua
DEVELOPMENT OF ASC IN THE BLOWING MODE OF THE RING FURNACE WHEN ENRICHING THE BLOW WITH PROCESS OXYGEN
Abstract. The promising measures to increase the energy efficiency of ring furnaces is to increase the air heating temperature by transferring the ring furnace to a regenerative heating system and enrichment of combustion air with process oxygen. The use of regenerative burner devices requires significant investments. At the same time, in the presence of surplus process oxygen and limited investment opportunities of the enterprise, it is advisable to implement the technology of heating metal in oxygen-enriched air. The thermal operation of ring furnace of pipe rolling workshop No. 4 of PJSC “Interpipe NTZ”, which operates on atmospheric and oxygen-enriched air, was studied. Two options for organizing the mixing of process oxygen with atmospheric air were considered: 1) after heating atmospheric air in the recuperator; 2) before the recuperator with subsequent heating in the recuperator of a mixture of atmospheric air and process oxygen. To implement the measure, a temperature regime for the furnace operation on oxygen-enriched air was developed. Based on the analysis of the technical and economic situation at the enterprise, it is recommended to implement the option of mixing heated atmospheric air with process oxygen after the recuperator. The algorithm for controlling such the combined blast of ring furnace has been developed. Taking into account the requirements of the technical task, an appropriate control system using the microprocessor computing complex has been developed. Based on the results of computer modeling of “gas-air-oxygen” ratio control, the control laws have been selected and the settings of the fuel, heated air and process oxygen flow regulators have been determined, which ensure the specified thermal regime of the heating ring furnace. It has been determined that to use the available process oxygen resource of 2000 m3/h in the ring furnace, it is possible to increase the oxygen concentration in the blast air to 33.6%. This ensures an increase in the energy efficiency of furnace and fuel savings of up to 18%. The annual economic effect of implementing the measure will be almost 10 million UAH. The results of the work can be the basis for creating an automated control system for the combined blast of the ring furnace.
Key words: ring furnace, blowing mode, process oxygen, automated control system, computer modeling.
DOI: https://doi.org/10.52150/2522-9117-2024-38-741-752
For citation: Mykhailovskyi, M. V., Gupalo, O. V., Yehorov, O. P., & Shybakinskyi, V. I. (2024). Development of ASC in the blowing mode of the ring furnace when enriching the blow with process oxygen. Fundamental and applied problems of ferrous metallurgy, No. 38, P. 741-752. https://doi.org/10.52150/2522-9117-2024-38-741-752
References
1. Gres, L. P., Gupalo, O. V., Yeromin, O. O., Karakash, Ye. O., & Diakova, E. K. (2019). Research on the efficiency of the use of process oxygen to enrich the combustion air in metallurgical heating equipment. Metalurhiina ta hirnychorudna promyslovist, (3-4). P. 14-24. http://doi.org/10.34185/0543-5749.2019-3-4-14-24
2. Chupryna, L. V., & Terentiev, V. I. (2002). Tekhnologichna instruktsiia TI 243-Tr4-01-02 “Prokatka trub na ustanovtsi z pilihrymovymy stanamy 5-12″ v TPTs-4”. PJSC “NTZ”
3. Gupalo, E. V, Stromenko, A. S., & Yashnyi, V. V. (2016). Using of process oxygen surplus into heating furnaces of tube-rolling shop. In XVII International scientific conference “New technologies and achievements in metallurgy and material engineering and production engineering”. Series: Monografic No. 56. Czestochowa. Р. 500-503
