双碳目标下的钢铁节能理念创新与能源结构重塑探讨

在“碳达峰”“碳中和”背景下,中国钢铁必须走脱碳化发展道路,提高能效是当前最为行之有效的举措之一。通过分析钢铁行业存在的较大节能潜力及拥有丰富二次能源的用能特点,在热力学定律、系统最小外部损失、最佳推动力、能源梯级利用等几项基本原则的基础上,提出钢铁行业多能互补与储能相结合的创新理念,包括钢铁二次能源与可再生能源的互补、钢铁不同高低品位能源的互补、储能系统的创新应用等。从中长期看,需以更高的站位,走能源资源环境、高效清洁低碳一体化协同创新道路,构建化工-能源-生态一体化用能系统,进行合理优化与集成,实现能效提升及协同碳减排。

Discussion on steel energy-saving concept innovation and energy structure reconstruction under "double carbon" target

Under the background of "emission peak" and "carbon neutrality", China's iron and steel industry must take the low carbon emission development road. Improving energy efficiency is one of the most manageable and effective measures. This paper analyzes the energy utilization characteristics of iron and steel industry, which are great energy saving potential and abundant secondary energy. Based on the principles of thermodynamic law, the minimum external loss of system, optimal driving force and cascade utilization of energy, this paper puts forward the innovative concept of combination for multi-energy complementation and energy storage in iron and steel industry. This concept includes complementation of renewable energy and secondary energy in steel factory, high grade and low grade energy, energy storage system and other innovative applications. In the medium-term and long-term, we need to take a higher stand and take the path of collaborative innovation in integration of energy, resources and environment, high efficiency, clean and low carbon emission, build an integrated energy using system of chemical industry, energy industry and ecology system, optimize and integrate all the parts reasonably, and achieve energy efficiency improvement and synergistic carbon emission reduction.