烧结余热梯级提取双压发电系统热力学优化

Thermodynamic optimization of dual pressure power system on cascade extraction about sintering waste heat

针对我国烧结余热梯级提取双压发电系统发电指标偏低的问题,以减少损失为目标对该系统进行了热力学优化。利用数值模拟和计算机变工况仿真的方法分别对余热梯级提取及梯级利用过程中热力学与传热特性之间的协同机制进行研究。提出环冷机物理边界与热力学边界统一的热力学过程约束条件,建立边界统一条件下的余热梯级提取分配、匹配方式优化模型以及基于特定双压余热锅炉结构的余热梯级利用过程进、出口余热参数干预方式优化模型,并对实际发电系统进行了热力学优化。结果表明,该系统通过余热梯级提取及利用热力学过程优化后发电指标提高了15%左右。

In order to reduce energy loss and improve power generation, the thermodynamic optimization of dual pressure generating system is obtained in the cascade extraction processing of sintering waste heat. The synergy mechanism of thermodynamics and heat transfer characteristics in the cascade extraction and utilization processing is also studied by numerical simulation and computer operation mode simulation methods. The research establishes waste heat cascade extraction distribution optimization model, and parameters at the inlet and outlet of the cascade utilization of waste heat process interventions optimization model, notes that based on unified physical and thermodynamic boundary of thermodynamics process constraints in ring cooler, the thermodynamic optimization of the actual power generation system is carried out. The results show that the power generation could be improved 15% by the cascade extraction and utilization processing and thermodynamic optimization in the system.