Wyniki wyszukiwania - BazTech

1

Actual problems of thermal and renewable energy in metallurgy

Lazić Ladislav, Pavlenko Anatoliy

Journal of New Technologies in Environmental Science

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2019

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Vol. 3, nr 1

3--9

EN

Industrial production has been driven by the requirements of maintaining or improving product quality and minimization of production costs. Within these requirements the overall energy management plays important roles. It is a known fact that the improving fuel utilisation efficiency is the key to good financial and environmental practice. To meet the higher requirements it is necessary to improve existing furnace by optimising the energy efficiency and by reducing the pollutant production of burners and combustion chambers. In the introduction of the article, the efficiency improvement opportunities for fuel-based process heating systems in metallurgical practice are listed. Thereafter, some of the solutions for increasing the energy efficiency for metallurgical furnaces in the Republic of Croatia are briefly described.

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The Influence of Burner Locations in the Heating Furnace on the Charge Temperature Field

Rywotycki M., Szajding A., Malinowski Z., Telejko T., Gołdasz A., Beneš M.

Archives of Metallurgy and Materials

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2015

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Vol. 60, iss. 3A

1981--1985

EN

Charge heating in industrial furnaces is a difficult and complex process. There are many physical phenomena which influence heat transfer. At the charge surface heat transfer takes place by radiation and convection. In order to ensure correct operation of the technological system, it is necessary to achieve the required charge temperature in the whole volume and ensure its uniformity. The influence of selected burner locations inside the furnace on the charge temperature has been analysed. The temperature field and its uniformity in the round charge made of steel for hot open die forging have been analysed. The model and numerical calculations were performed with the ANSYS-Fluent 14.5 package.

PL

Nagrzewanie wsadu w piecach przemysłowych jest trudnym i złożonym procesem. Celem zapewnienia prawidłowej pracy ciągu technologicznego konieczne jest osiągnięcie przez wsad wymaganej temperatury w całej objętości, oraz zapewnienie odpowiedniej równomierności nagrzewania. W pracy określono wpływ sposobu nagrzewania wsadu w piecu komorowym dla wybranych wariantów usytuowania palników grzewczych. Analizie poddano pole temperatury i jego jednorodność w nagrzewanym wsadzie stalowym przeznaczonym do przeróbki plastycznej. Model i obliczenia wykonano pakietem numerycznym ANSYS-Fluent 14.5.

3

A goal oriented approach to model identification of an industrial furnace system combining a priori knowledge and optimal estimation

Vinsonneau B., Martineau S., Goodall D. P., Burnham K. J.

Systems Science

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2007

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Vol. 33, no 4

103-110

EN

Prompted by the need to determine a unique tuning parameter, the paper proposes a conceptual model for a high temperature industrial furnace in which the notion of an unmeasurable "global temperature" plays a key role. The developed approach is designed to accommodate a priori knowledge of system nonlinearities, as well as the effects of an externally triggered burner firing cycle which gives rise to an oscillatory response present on the locally measured zone temperature. It is assumed that the variation in the global temperature is lower than that observed at the locally measured temperature at a point. The developed model is able to accommodate, and effectively separate, the effects of the combustion burner firing cycle and the underlying bilinear characteristic behaviour relating fuel combustion and temperature of each zone. It is assumed that these physical phenomena can be represented by a linear model, modelling the effects of the combustion burner firing cycle, cascaded with a bilinear model, where an intermediate variable is the global temperature. The result of employing a regularisation technique together with the cascade multiple model produces an optimal value for the tuning parameter of a four-term bilinear PID control system.

4

Możliwości obniżenia emisji tlenków azotu z pieców przemysłowych wyposażonych w palniki tlenowe

Tomeczek J., Góral J., Rozpondek M., Ochman J.

Hutnik, Wiadomości Hutnicze

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2006

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Vol. 73, nr 5

229-233

PL

Przedstawiono zalety i wady stosowania palników gazowo - tlenowych do opalania przemysłowych pieców wysokotemperaturowych. Wykazano możliwość podniesienia sprawności pieców przy stosowaniu tlenu jako utleniacza gazu ziemnego. Zademonstrowano wyniki badań eksperymentalnych palników tlenowych o mocy 500 kW w komorze doświadczalnej Laboratorium Badań Płomieni Przemysłowych pod kątem możliwości obniżenia emisji NOx do otoczenia.

EN

The characteristics of natural gas-oxygen burners applied to high temperature industrial furnaces is presented. The possibility of furnace efficiency increase in case of oxy combustion has been demonstrated. Experimental results of oxy burners of capacity 500 kW examined in a test furnace of the Industrial Flame Research Laboratory are presented and particularly the possibilities of NOx emission abatement.