Abstract:

Fuel gas, steam and power are important components of energy systems in integrated iron and steel works, which consists about 60% of total energy consumption. Reasonable development of energy output, fuel consumption and power purchase plan has very important significance in cost reduction and pollution control in integrated iron and steel works. Based on characteristics of fuel structure, equipment types and operating conditions, a coupled system optimization model was established to minimize both economic and environmental costs. With consideration of influencing factors, such as fluctuation of excess fuel gas, dynamic demand of steam and electricity, multi-fuel structure and external time-segmented price, the optimal scheduling plan for energy system was solved by GAMS software. The simulation results of the model applied to a large steel company show that the model can effectively provide a reasonable production plan of fuel gas-steam-power system, regulate excess fuel gas, efficient energy use, reduce operation cost, and increase economic and environmental benefits.

Key words: iron and steel works, system engineering, environment, steam, power, optimization

摘要：

煤气、蒸汽和电力是钢铁联合企业能源系统的重要组成部分，其消耗占钢铁企业总能耗的60%左右。合理地制定能源系统的生产以及燃料消耗、电力采购计划，对企业降低成本、减少环境污染有着非常重要的意义。针对煤气-蒸汽-电力系统的燃料结构、设备类型、工况变化等特点，以经济运行成本和环境成本最小为目标函数，建立了针对该系统的耦合优化模型。该模型综合考虑了富余煤气的波动、蒸汽和电力的动态需求、多燃料结构、分时电价等影响因素，并使用GAMS进行优化求解。将模型应用到某大型钢铁联合企业，结果表明该模型能够为钢铁企业煤气-蒸汽-电力系统提供合理的生产计划方案，实现了富余煤气的合理分配以及能源的高效利用，降低了能源系统运行成本，提高了企业的经济效益和环境效益。

关键词: 钢铁企业, 系统工程, 环境, 蒸汽, 电力, 优化