高炉冲渣水余热半导体热电发电模型与数值模拟

Power Generation Model and Numerical Simulation of Blast Furnace Slag Water Waste Heat Driven Semiconductor Thermoelectric

针对中国钢铁工业低温余热回收利用率低的现状,提出一种基于半导体热电发电技术回收高炉冲渣水显热的技术方案,建立了相应的计算模型,分析了冲渣水温度、热电单元长度、热电模块填充系数、换热器流道长度等关键参数与装置性能的关系。结果表明,对于100℃的高炉冲渣水,利用热电发电技术,每米流程可使水温下降约1.5℃,每平方米换热面积可以产生约0.93kW电能,热效率约为2%,设备成本的回收周期在10年左右。

Against the low rate of low temperature waste heat recovery for China＇s iron and steel industry, a semicon- ductor thermoelectric power generation technology based technical solutions recycling blast furnace slag flushing wa ter sensible heat was presented. The corresponding calculation model was established, and the relations among the key parameters such as slag washing water temperature, the length of the thermoelectric element, the packing factor of the thermoelectric module, heat exchanger flow passage length and the device performance were analyzed. The re suits shows that based on thermoelectric power generation technology and blast furnace slag flushing water at 100 ℃, water temperature drop is 1.5 ℃ per meter process, about 0.93 kW electrical energy can he produced per square meter heat transfer surface area, and thermal efficiency of about 2% can be achieved. The recovery period of the equipment cost is about 10 years.