延迟焦化装置扩产和用能瓶颈分析与改进

 借助过程系统能量综合优化的"三环节"（能量转换,能量利用,能量回收）能量优化策略方法,以国内某延迟焦化装置为研究对象,探讨"三环节"理论方法对装置扩产及用能的影响,找出相应的用能瓶颈。运用流程模拟技术对装置进行模拟优化,提出基于过程能量综合优化的扩产策略：对配套的加热炉优化,分馏塔操作调优,换热网络优化匹配,循环比优化调整等。通过扩产和能量同时优化改造,处理量增大了25%,装置的能量利用效率得到提高,且改造方案中充分利用了已有设备和流程,为同类装置的扩产改造提供了参考。

ANALYSIS AND IMPROVEMENT FOR BOTTLENECKS OF CAPACITY EXPANSION AND ENERGY UTILIZATION IN DELAYED COKING UNIT

Based on the three-link strategic method of energy integration and optimization, a domestic delayed coking unit is taken as research background. The influence of the three-link method on the capacity expansion and energy-use is discussed, thus the relative bottlenecks are found. Using simulation software the strategies for capacity enlargement and measures for debottlenecking energy-use are proposed. It is demonstrated that the capacity enlargement and energy integration can be achieved simultaneously through optimization of furnace, optimizing the operation of fractionator, flexible design of the heat exchange networks and proper adjusting the recycle ratio, etc. Finally, based on the original process flow and equipments, a 25% increase of processing capacity and a decrease in energy consumption are achieved, the economic benefit is significant.