Power Engineering and Ecology | |
ArticleName | Concepts for power generation from the waste energy of ESFs and reheating furnaces |
ArticleAuthor | C. Born, R. Granderath. |
ArticleAuthorData | Tenova Re Energy GmbH (Düsseldorf, Germany): Born C., Mag. Econ., Commercial manager E-mail (common): reenergy@de.tenovagroup.com |
Abstract | Once a furnace is equipped with all modern technology for energy consumption reduction the next big step in energy efficiency is heat recovery. Depending on the furnace type either off-gas or cooling water is the biggest potential; the common point is steam generation. If steam cannot be sold or used for plant processes the remaining option is power generation. Discussing power generation, the following parameters should be taken into account - level of temperatures, value of power, duration of furnace campaign and permanent charge. Given the characteristics for steel plant heat recovery there are some challenges that must be overcome. The typical steam turbine is not always the best choice, so alternative turbine concepts are considered (turbines with saturated steam, steam motors and organic ranking cycle (ORC) turbine. The paper observes heat recovery of waste gases for different kinds of furnaces: electric arc furnace, walking-beam furnace, pusher-type furnace and other. Two options of metallurgical future are examined: integrated mill and mini-mill. It is concluded that stem production via Tenova iRecovery system is a practically approved technology for diff erent kinds of furnaces. |
keywords | Furnaces, energy consumption, heat recovery, steam generation, steam turbines, waste gases, furnace campaign |
References | 1. Wiser, W.: Energy resources: occurrence, production, conversion, use, Birkhäuser, 2000, S. 190. |
Language of full-text | russian |
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