Steel Industry Multi-type Energy Optimized Scheduling with Energy Flow Network Simulation
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摘要: 钢铁工业发展面临能源的严重制约，能源优化调配是钢铁企业系统节能的关键技术之一.从钢铁制造流程物质流能量流耦合特点出发，首先，探讨了基于能量流网络仿真的钢铁工业多能源介质综合优化调配策略；然后，探讨了能量流网络化建模、生产流程与能源系统结合的能源仿真、多能源介质综合优化调配技术；最后，给出了在钢铁企业示范应用的效果.Abstract: Energy optimized scheduling is one of the key techniques for system energy saving in steel industry. In this paper, firstly, the energy optimized scheduling method with energy flow network simulation is introduced in the context of mass flow and energy flow coupled steel process. Secondly, some techniques including energy flow network model, steel process and energy system integrated energy simulation, multi-type energy optimized scheduling in steel works are addressed. In the end, some examples are given to illustrate the application results of the new energy optimized scheduling method.
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Key words:
- Steel industry /
- energy flow network /
- process simulation /
- energy optimization
1) 本文责任编委 王伟 -
图 2 钢铁企业能量流网络集成模型结构框图
Fig. 2 Structural block diagram of energy flow network integration model for iron and steel enterprises
图 3 高炉工序与能量流网络模型集成
Fig. 3 Blast furnace process and energy flow network model integration
图 4 电力能量流网络与其他介质能量流网络集成
Fig. 4 Power energy flow network and other media energy flow network integration
图 5 基于能量流网络模型的能源系统动态仿真
Fig. 5 Dynamic simulation of energy system based on energy flow network model
图 7 煤气的调配规则及各类负荷分配次序
Fig. 7 Gas distribution rules and various types of load distribution order
图 8 某钢铁企业一段时间内煤气和电力供需平衡情况
Fig. 8 Gas and electricity supply and demand balance in a period of time in a steel enterprise
图 9 基于能源仿真的多能源介质综合优化调配流程
Fig. 9 Comprehensive optimization of multi-energy medium based on energy simulation
图 10 某钢铁企业煤气-蒸汽-电力系统示意图
Fig. 10 A diagram of a gas-steam-electric power system in a steel enterprise
图 11 各周期系统运行费用优化前后对比
Fig. 11 Comparison of system operating costs of each cycle before and after optimization
表 1 各时段富余煤气供应及蒸汽和电力需求
Table 1 Wealthy gas supply and steam and electricity demand for each period
时段 BFG (km3/h) COG (km3/h) 电(MW) S1 (t/h) S2 (t/h) S3 (t/h) 1 535.51 53.53 706.28 68.04 232.02 72.88 2 559.04 54.92 695.72 65.46 233.63 86.54 3 596.72 53.19 687.07 68.50 244.10 86.51 4 601.08 54.33 688.21 68.00 241.65 87.06 5 603.81 50.49 683.91 69.29 232.46 87.34 6 591.34 41.40 692.70 66.46 227.09 75.43 7 519.22 41.01 687.92 67.75 212.86 88.88 8 535.57 39.67 671.71 68.88 222.10 92.51 9 551.91 37.43 645.14 68.46 231.19 95.83 10 485.58 29.66 621.28 67.25 223.98 95.74 11 450.53 29.85 606.15 68.25 213.31 96.46 12 434.83 41.19 590.32 69.25 211.23 95.31 13 526.87 49.38 598.75 63.96 210.01 96.10 14 574.09 51.22 588.72 64.46 207.68 95.13 15 575.12 50.32 580.63 64.96 211.26 94.86 16 579.06 50.39 590.40 66.46 208.83 94.80 17 585.32 49.34 614.26 67.41 204.75 94.98 18 490.65 49.33 627.63 65.41 204.20 95.43 19 465.11 50.53 630.09 64.58 204.95 96.00 20 479.29 45.10 633.68 68.68 204.07 95.14 21 555.11 42.69 639.92 68.67 199.99 95.60 22 588.46 42.71 661.87 68.17 210.39 95.31 23 583.30 44.64 665.51 67.67 207.11 94.44 24 544.32 47.94 672.49 66.00 216.08 90.16 
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表 2 正常工况优化前后各种费用比较
Table 2 Comparison of various costs in normal working conditions before and after optimization
费用 优化前 优化后 外购煤费用(万元) 233.6498 234.1791 外购天然气费用(万元) 0 0 给水费用(万元) 7.5127 7.6305 缓冲用户煤气使用费用(万元) 122.0902 123.1707 外购电费用(万元) 23.8638 9.18634 外送电收益(万元) 10.6401 18.7683 设备运行维护费用(万元) 98.9796 101.4965 总费用(万元) 475.4562 456.8951 放散率 0 0
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表 3 电网电价
Table 3 Grid price
时段 时间 外购电价(元/kWh) 外送电价(元/kWh) 峰时段 8:00~11:00和19:00~23:00 0.7188 0.3394 平时段 7:00~8:00和11:00~19:00 0.4917 0.3394 谷时段 0:00~7:00和23:00~24:00 0.2796 0.3394
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表 4 铁钢系统减产10小时工况优化前后各种费用对比
Table 4 The comparison of various costs for 10 hour reduction of the steel system before and after optimization
费用 优化前 优化后 外购煤费用(万元) 253.68 205.82 外购天然气费用(万元) 2.58 5.78 缓冲用户煤气使用费用(万元) 100.15 97.5 外购电费用(万元) 36.32 37.56 外送电收益(万元) 0 80.07 设备运行维护费用(万元) 82.22 82.04 总费用(万元) 474.96 348.64 放散率 0 0
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表 5 2 250轧线停产12小时工况优化前后各种费用对比
Table 5 The comparison of various costs for 12 hours cut ofi of 2 250 rolling line before and after the optimization
费用 优化前 优化后 外购煤费用(万元) 213.17 193.497 外购天然气费用(万元) 2.41 2.38 缓冲用户煤气使用费用(万元) 118.63 96.119 外购电费用(万元) 29.17 38.84 外送电收益(万元) 0 24.69 设备运行维护费用(万元) 81.73 81.23 总费用(万元) 445.13 387.388 放散率 0 0
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