烧结环冷机余热发电的风量优化配置

Optimization of air flow rate within circular cooler for waste heat power station

环冷机余热发电是烧结厂节能增效的重要途径,同时也是烧结余热利用方式中成熟可靠的技术手段。在环冷机规格与锅炉型号确定的情况下,合理分配环冷机各段的冷却风量,有助于在保证烧结矿冷却效果的前提下提升其余热发电量。本文基于烧结环冷机过程模拟模型以及余热发电功率的预测模型,以发电功率为目标,采用遗传算法对环冷机冷却风量进行了优化。对国内360 m^2环冷机的风量优化配置值与其风量未优化现场运行参数进行了对比,结果表明:通过冷却风量的优化配置可以提高5%~10%的发电效率。

Waste heat power generation of circular-cooler is an important energy-saving measure for iron ore sintering plant, and it is also a reliable technical means of waste heat utilization. With the given specifications of circular-cooler and exhaust heat boiler, allocating rationally the cooling air volume in different sections of the cooler is helpful to raising the waste heat power gen- eration under the premise of ensuring the sinter cooling effect. Based on the process simulation model of circular cooler for sinter machine and the prediction model of waste heat power generation capacity, with the generating power as the target, the genetic al- gorithm was used to optimize the air flow-rate of circular cooler. The optimized air rate value and non-optimized site air rate oper- ation parameters for the domestic 360 m^2 circular cooler were compared, and the result shows that, the power generating efficiency can be increased by 5% ～ 10% though optimization cooling air rate.