PDF《博士学位论文公示材料》

503 gce/kWh 下降到

396 gce/kWh,年发电量提高约 4.08 亿度.以开放系统观点指导下的协同优化方案二的 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.故未来钢铁企业煤气系统优 化调度过程必将以开放系统的观点、依据物质流与能量流的协同优化运行规律为指导,以取得更高的 经济效益. ―2― 论文摘要(英文) Since the new century, the iron and steel industry in all countries is 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 walks of life, 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 the byproduct gas system, analyze the existing problems. A comprehensive analysis was conducted from the network structure, functions, research perspectives, theoretical methods and reasonable operation modes of the byproduct gas system. It is pointed out that the operation of the 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. The transformation of gas utilization mode and the gas user'

s function role, the change of research scope of the gas system and the function of the energy management center are realized. (2) The mathematical model of byproduct gas system optimal management and control is set up, which includes the prediction module and the optimal scheduling module. 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. The nonlinear programming mathematical model is established including the gas consumption system constraints, gas transportation system constraints and the buffer system constraints, etc. Guiding the optimal allocation of byproduct gases in the system by using the established model. (3) Network structure of the byproduct gas system is improved, including optimization of the gasholder location, the gasholder capacity and the physical structure of buffer system. First, the model is used to optimize the allocation of byproduct gases in the system. By using the two new parameters to track and analyze the gas fluctuation of each unit and the nodes of gas pipeline network. By comparing the benefits of the gas system, suitable gasholder'

s site in the steel plant is finally obtained. Second, 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 the period is less than

2 h, it is calculated that the optimal value of gasholder can be reduced by about 50% compared with the real one. Third, the mathematical model of optimal physical structure of buffering system is invoked, the optimal value of boiler and gasholder capacity and........