矿热炉节电控制在线数学模型解析

Analysis on online mathematical model for submerged arc furnace power-saving control

通过对某电石厂25 500 kV.A电石炉实时生产数据的采集和原料化学成分的检测,进行了动态物料平衡和热量平衡计算,建立了矿热炉节电控制在线数学模型,从而对电石液成分、煤气成分、电石生产各个部分的能量消耗进行实时预测,定量化电石炉内的物质流和能量流动态,实现对电石液排放的优化管理控制及电石炉电能消耗的在线监测。经计算,生产1 t电石液电能消耗量为3 205.78 kW.h,比优化管理前电耗平均值降低约100 kW.h。电能利用率为50.03%,产物带走的显热占22.83%。

Through real-time production data acquisition and chemical composition analysis of raw materials from a 25 500 kV· A calcium carbide furnace in a calcium carbide factory, dynamic material balance and heat equilibrium were calculated, and an online mathematical model for power-saving control of submerged arc furnace was established.Thus the calcium carbide liquid ingredients, gas composition, and energy consumption of each calcium carbide production unit could be predicted in real-time and material flow and energy flow in the calcium carbide furnace could be quantified.Finally, the optimization for the calcium carbide liquid discharged management control and online monitoring of calcium carbide furnace electricity consumption were realized.Through calculation,the power consumption of production 1 t of calcium carbide fluid was 3 205.78 kW ·h, reduced by about 100 kW·h compared with the average power consumption before management optimization.The energy uti- lization ratio was 50.03%, and the sensible heat taken away by the products was 22.83%.