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Energy savings in reheating furnaces through process modelling

机译：通过工艺建模再加热炉的节能

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摘要

Nowadays, energy efficiency is a crucial factor for the competitiveness of manufacturing firms, due to the rising of world energy prices and as a consequence of the environmental consciousness concerned with the consumption of non-renewable energy resources. The furnaces for steel reheating are responsible for a large amount of energy consumption, where less than 50% of the energy supplied to the furnace (mainly gaseous fuel) is net energy of steel heating, the remaining is lost. A consistent set of studies, which investigates energy reduction initiatives for the reheating furnaces, can be found in literature. However, almost all the studies are focused on technology alternatives (such as regenerative burners), whereas some others focus their attention on measurement and control action, mainly obtained by IT investments. This study aims at providing a mathematical model for a reheating furnace, by considering the efficiency-temperature relationships of the furnace. The model permits the user to identify the most proper optimization of the temperature-time relations, in the different productive situations, capable of guaranteeing the most energy-efficient reheating operations by preserving logistics performances. In order to make a cost-benefit analysis, different options for the furnace setting and related process operations have been considered with reference to a specific industrial case. The model highlights how improving the operating policies for controlling the key process parameters may lead to energy savings and, consequently, economic benefits, as well as pursuing environmental preservation thanks to the rational use of non-renewable resources.
机译：如今，由于世界能源价格上涨，由于世界能源价格上升，因此，能源效率是制造业公司竞争力的关键因素，并且由于涉及不可再生能源消费的环境意识。用于钢再加热的炉子负责大量的能量消耗，其中距离炉子（主要是气体燃料）提供的低于50％的能量是钢加热的净能量，剩余损失。一组一致的研究，研究了再加热炉的能量降低措施，可以在文献中找到。然而，几乎所有的研究都集中在技术替代品（如再生燃烧器）上，而其他一些研究将重点关注其对测量和控制行动，主要由IT投资获得。本研究旨在通过考虑炉的效率温度关系来为再加热炉提供数学模型。该模型允许用户在不同的生产情况中识别热温关系的最适当的优化，能够通过保留物流表演来保证最节能的再加热操作。为了进行成本效益分析，参考特定工业案例考虑了炉子设置和相关过程操作的不同选择。该模型突出了控制关键过程参数的操作策略如何提高能源节省，因此，由于合理使用不可再生资源而追求环境保护。

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