炼化企业节能节水及装置扩能改造瓶颈辨识探讨

炼化企业是耗能用水大户,随着国家对节能减排要求的逐渐严格,炼化企业节能节水工作面临较大的压力.过程系统集成优化技术把炼化生产过程作为统一整体考虑,可最大化实现节能节水效果.过程系统作为一个有机的整体,系统中必然有一些单元过程构成系统节能节水的瓶颈,辨识这样的系统瓶颈,并研究相应的解瓶颈策略,可使节能节水取得事半功倍的效果.本文在对炼化企业能量系统和用水网络常用的优化技术和方法进行介绍的基础上,重点分析了炼化企业节能节水瓶颈辨识的研究进展,主要涉及节能瓶颈、节水瓶颈以及装置扩能改造瓶颈的辨识等方面的研究进展.当前的研究主要集中在单一网络的瓶颈辨识,下一步的研究方向应从单功能网络逐步推进到耦合网络.

Discussion on identifying energy,water and capacity expansion bottlenecks for refineries

Refineries and chemical plants consume great amounts of energy and water. With increasingly stringent national requirements for energy conservation and emission reduction, these enterptises face more and more pressure. Process system integration and optimization technology dealing with an enterprise as a whole, can maximize energy and water saving effects. As an organic whole, a process system necessarily includes some unit processes that form the bottleneck of energy or/and water conservation, whose performance constrains the whole system's overall performance. Identificating such bottleneck, and studying the corresponding solution strategy, will get twice the result with half the effort of energy and water conservation. Based on energy system and water network optimization techniques and methods, this paper analyzes research progress of bottleneck identification on energy conservation, water conservation and plant retrofit for refineries and chemical plants. Current researches focus on bottleneck identification of single-function networks, and further research should pay attention to multi-function networks bottleneck identification.