低温工艺热流体的分级冷却及控制研究

摘要

针对常规冷却方式和ORC发电冷却方式的缺陷,提出了低温工艺热流体的分级冷却系统;以某煤制油过程中的低温热流体工况为研究对象,计算了分级冷却系统的能耗情况,并与常规冷却方式和ORC发电冷却方式的能耗进行了对比,结果表明:分级冷却系统在工艺热流体冷却过程中,相比常规冷却方式,不仅不消耗额外的电能和水资源,反而产生发电收益,并且其发电功率远大于发电冷却方式的发电功率;最后,提出了低温工艺热流体分级冷却系统的控制方法.%The multi-stage cooling system of hot fluid is developed because of the weakness of the conventional and ORC power generation cooling method.The energy consumption of the multi-stage cooling system of hot fluid in some coal-to-liquids process is calculated,and then compared with that of the conventional and ORC power generation cooling method.It is found that the multi-stage cooling system does not consume power and water resources,and can obtain more power than the ORC power generation cooling method.Finally,the control method of the multi-stage cooling system is developed.