PDF《博士学位论文公示材料》

―1― 博士学位论文公示材料 学生姓名 杨靖辉 学号

1110265 二级学科 热能工程 导师姓名 蔡九菊 论文题目 钢铁厂煤气信息物理系统协同优化研究 论文研究方向 冶金热能工程;

工业系统节能 论文关键词 钢铁企业;

副产煤气;

信息物理系统;

能量流;

优化调度 论文摘要(中文) 新世纪以来,各国钢铁工业都面临着新的发展机遇和挑战.

一方面,科技的进步使得大数据和云 计算在各行各业相继取得突破,冶金行业正经历着蓬勃的发展时期;

另一方面,生态环境的变化向钢 铁工业提出新的时代命题.使钢铁行业自身发展与新时代科学技术相适应,通过以钢铁制造流程物理 系统的结构优化和数字化信息系统相互融合,实现钢铁企业生产过程的协同优化将势在必行.为此, 本文将钢铁企业煤气系统作为研究对象,从煤气系统物理结构改进和协同优化调度两个方面开展相关 研究. (1)全面总结钢铁企业煤气系统的发展及研究现状,分析存在问题.从煤气系统物理结构、功能、 研究观点、指导思想等方面进行阐述.指出煤气系统优化过程要以物质流与能量流协同运行理论为基 础、以动态的非平衡思想为指导、采用开放系统的观点开展研究工作.结合冶金热能工程专业的发展 过程,系统分析了煤气系统研究的不同阶段,包括单体设备煤气产耗的节能研究阶段、系统节能阶段、 能量流行为与能量流网络研究阶段、以及未来煤气信息物理系统运行模式的研究阶段. (2)建立钢铁企业煤气系统优化研究数学模型,包括煤气流预测模型、煤气资源优化分配模型、 煤气信息物理系统硬件体系优化模型.其中,煤气流变化过程预测作为煤气系统研究工作的基础,依 据物质流与能量流之间的因果关系,建立启发式规则,提出基于钢铁厂物质流的煤气产耗量预测因果 关系法对煤气流进行预测.利用数学规划法建立煤气系统优化调度模型指导煤气资源分配.钢铁厂煤 气系统物理结构优化模型,包括煤气流网络结构优化模型和煤气缓冲区域网物理硬件体系优化模型, 指导煤气系统优化研究工作. (3)基于所建模型开展钢铁企业煤气系统物理结构优化研究,并分析对煤气流运行促进作用.通 过对煤气流运行波动特性分析,利用所建两类参数实时追踪各类煤气流网络节点和煤气管网系统各管 段的煤气波动变化情况,得到钢铁企业煤气系统网络结构缓冲节点的最佳位置.经研究,改进后的煤 气输配系统相比较于原系统运行费用降低约

768 元/h.煤气流网络节点容量优化方面,提出基于锅炉燃 料负荷调节周期配合条件下的煤气柜柜容动态设计方法.当锅炉发挥动态调节能力,调节周期低于

2 h 时,计算得到煤气柜柜容优化值相比于企业实际情况减少约 50%,从而使煤气缓冲节点调节能力更加 灵活,降低系统建设成本.煤气缓冲系统物理结构优化方面,研究锅炉燃料负荷和煤气柜柜容的优化 设计关系曲线.得到煤气柜与锅炉优化过程应遵循的最佳设计规则,指导钢铁厂煤气系统物理结构优 化,使未来企业扩建工作更加科学合理. (4) 研究钢铁企业煤气信息物理系统协同优化管控过程. 依据钢铁厂物质流与能量流之间的关系, 利用因果关系法预测煤气流变化.以协同运行思想、动态的非平衡观点结合煤气系统物理结构改进指 导煤气资源优化分配.相比于企业实际方案,在煤气系统范围内,以系统高效率运行思想指导下的协 同优化方案使煤气系统发电燃耗由

503 gce/kWh 下降到

396 gce/kWh,年发电量提高约 4.08 亿度.以开 放系统观点和系统高效益运行思想指导下的协同优化方案,其发电效率相比于企业实际方案提高约 30.3%,年发电效益提高约 3.5 亿元.因此,未来钢铁企业煤气信息物理系统的运行模式必将采用开放 系统的观点、以物质流与能量流的协同理论为指导,通过物理系统改进和煤气流运行程序优化的共同 作用实现.从而使钢铁企业获得更高的经济效益. ―2― 论文摘要(英文) In the new century, the iron and steel industry in all countries are facing new opportunities and challenges. On the one hand, the progress of science and technology made the big data and cloud computing breakthroughs in all trades and professions, the metallurgical industry is experiencing a period of vigorous development. On the other hand, the change of ecological environmental puts forward a new epochal proposition. Therefore, making the development of the iron and steel industry adapt to the new era of science and technology, achieving the synergy operation in the production process by integrating the optimized physical system structure and digital information system of the steel manufacturing process is imperative. This article takes the byproduct gas system as research object, network structure improvement and allocation of byproduct gas were conducted in this paper. (1) Summarize the development and research status of byproduct gas system, analyze problems. A comprehensive analysis was conducted from the network structure, functions, research perspectives and theoretical methods of byproduct gas system. It is pointed out that the operation of byproduct gas system should be based on the theory of synergetic, guided by the dynamic and unbalanced thinking, with the open system perspective to carry out relevant research work. Combined with the development process of metallurgical and thermal engineering discipline, different stages of gas system research are systematically analyzed. Including single equipment energy saving research stage, systematic energy saving stage, energy flow and energy flow network stages and the operation mode of gas cyber-physical system in the future. (2) The mathematical model of byproduct gas system optimization research is set up, which includes prediction model, optimal scheduling model and physical structure optimization model. The prediction module establishes heuristic rules based on the relationship between mass flow and energy flow. On this basis, a causality method for predicting byproduct gas production and consumption is proposed. A programming mathematical model is established to guide the allocation of byproduct gases. Physical structure optimization model of byproduct gas system is established under the guidance of the idea of optimal operation of energy flow. Including gas flow network structure optimization model, physical structure optimization model of gas buffering zone network. Improvement of byproduct gas system physical structure is instructed. (3) The physical structure optimization of byproduct gas system is studied and promoting effect on gas flow is analyzed. By using the two parameters to track and analyze gas fluctuation of each unit and the nodes of gas pipeline network. Comparing operation benefits of the system, suitable gasholder'

s site is obtained. Operating cost of the improved transmission system is reduced by about

768 RMB/h. In terms of capacity optimization of gas flow network nodes, the dynamic design method of gasholder'

s capacity is proposed based on the coordination of boilers'

fuel load regulation cycle. When boiler has dynamic adjustment ability and its period is less than

2 h, the optimal value of gasholder can be reduced by about 50% compared with the real case. Regarding the physical structure optimization of buffer system, optimal value of boiler and gasholder and their relationship are studied. Design rules in construction of buffer system are obtained, optimal design curve is also fitted. Guiding the improvement of buffering system physical structure and the expansion of byproduct gas system in future. (4) Collaborative optimization and management of byproduct gas cyber-physical system is carried out. Causality method is used to predict the change of byproduct gas flow based on the relationship of material flow and energy flow in steel plant. Under the guidance of Synergy scheme, dynamic nonequilibrium viewpoint, optimal scheduling of byproduct gases is studied. The first collaborative optimization is carried out within the scope of byproduct gas system. Fuel consumption decreased from

503 gce/kWh to

396 gce/kWh, and annual power generation increased by

408 million degrees compared with the actual project. The second collaborative optimization guided by open system view and high beneficial thought, its power generation ―3― efficiency is raised by about 30.3% compared with the actual scheme, and........