换热网络节能潜力分析评价  

ANALYSIS AND EVALUATION OF ENERGY SAVING POTENTIAL OF HEAT EXCHANGER NETWORK

作　　者：辜乌根[1] 梁颖宗[1] 张冰剑[1] 陈清林[1] 

机构地区：[1]中山大学化学与化学工程学院低碳化学与过程节能广东省重点实验室,广州510275

出　　处：《石油炼制与化工》2013年第6期91-96,共6页Petroleum Processing and Petrochemicals

基　　金：国家自然科学基金(21076233);广东省科技计划重大专项基金(2010A080801003)

摘　　要：基于夹点技术,本研究通过分析实际热公用工程用量和最小热公用工程用量之间的相互关系,将实际热公用工程与最小热公用工程的差值作为换热网络优化改造的节能量,探讨提出将换热网络节能量与夹点区间热物流热量的比值作为节能潜力指标,用于评价换热网络改造的节能难度,并研究该指标在不同工艺装置热集成上的应用。以延迟焦化装置和喷气燃料加氢装置为案例,对其进行换热网络热集成改造,改造后增加热量回收4 537kW,节能效果显著。Heat exchanger network （HEN） is an important subsystem for energy recovery in process units. The energy utilization efficiency can be effectively improved by optimizing HEN. In order to guide the retrofit of HEN, it is necessary to analyze HEN, point out the energy saving potential and evaluate the difficulty of the energy saving. Based on Pinch technology, the relationship between the actual heat utility consumption and the minimum heat utility requirement is analyzed, and the difference value of them is regarded as the energy saving potential of HEN in this paper. On this basis, an energy saving potential index for evaluating the difficulty of the energy saving is presented, which is the ratio of the energy saving potential to the heat of hot streams in the Pinch section. In addition, the proposed index is applied to the heat integration between different process units. A case study of HEN of a delayed coking unit and a fuel hydrotreating unit is carried out, and the result shows that the energy recovery is increased by 4 537 kW.

关 键 词：换热网络 节能 热集成 夹点技术 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TK018[动力工程及工程热物理—热能工程]