Practice and basic research on carbon reduction through ultimate energy efficiency project for iron and steel in China
Energy efficiency improvement is not only an inherent requirement for the transformation and upgrading of the steel industry but also a key driver for its realization of green,low-carbon,and high-quality development.The Ultimate Energy Efficiency Project promoted by the China Iron and Steel Industry Association is an industry-wide project aimed at achieving the ultimate efficiency of iron and steel through the rapid promotion of mature technolo-gies,collaborative research and development of common technical challenges,and the formulation of a series of poli-cies,regulations,and standards.The"Three-Year Action Plan for Energy Efficiency Benchmarks"is an important measure to implement the Ultimate Energy Efficiency Project of iron and steel.The practical progress and implemen-tation performance of this measure are summarized,which also proposes that a data system is essential as the founda-tion for achieving energy efficiency benchmarking and capacity governance.It takes data system governance as the research objective,and based on the principle of mass-energy balance,proposes a new method for energy consump-tion data quality diagnosis and a three-layer and multi-level theoretical energy consumption data evaluation mecha-nism for typical processes.Finally,taking the processes of sintering and blast furnace as examples,it discusses and sorts out the data quality and evaluation mechanism from multiple perspectives such as the boundary division of col-lected data,the determination of the calculation method for theoretical energy consumption at different stages,the data quality diagnosis of key elements conservation in the process,and the reasonable selection of conversion factors for different energy sources.Utilizing the established the three-layer and multi-level energy consumption calculation model,under the premise of equivalent conversion between heat and standard coal,the theoretical,technical,and actual extreme energy consumption of the sintering process has been obtained.The key parameters affecting the energy consumption of the sintering process have been ranked in terms of sensitivity,with the order from highest to lowest include ratio of leakage air,ratio of water,sinter basicity,return ratio of sinter,ratio of heat loss,lime mass,FeO content of sinter,and MgO content of sinter.Concurrently,the theoretical and actual extreme energy consump-tion of blast furnace process has also been obtained,providing certain theoretical data support for energy conservation and carbon reduction in the steel industry.
iron and steel industryultimate energy efficiency projectaction for energy efficiency benchmarkthree-layer and multi-level modeldata governance
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