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基于㶲分析的富气轻烃回收工艺改进
Gas-rich light hydrocarbon recovery process improvement based on exergy analysis
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- DOI:
- 作者:
- 陈健, 藏强, 赵晓龙, 穆科, 梁昌晶
CHEN Jian, ZANG Qiang, ZHAO Xiaolong, MU Ke, LIANG Changjing
- 作者单位:
- 1. 华北石油管理局有限公司苏里格勘探开发分公司, 内蒙古鄂尔多斯 017300;2. 中国石油华北油田公司第三采油厂, 河北河间 062450;3. 中国石油华北油田公司第五采油厂, 河北辛集 052360
1. Sulige Exploration and Development Branch of Huabei Petroleum Administration Co., Ltd., Ordos 017300, China;2. No. 3 Oil Production Plant of Huabei Oilfield Company, CNPC, Hejian 062450, China;3. No. 5 Oil Production Plant of Huabei Oilfield Company, CNPC, Xinji 052360, China
- 关键词:
- 常规㶲; 高级㶲; 轻烃回收; 㶲损; 工艺改进
conventional exergy;advanced exergy;light hydrocarbon recovery;exergy loss;process improvement
- 摘要:
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为进一步揭示富气轻烃回收工艺的优化潜力和改进方向，了解工艺设备的用能水平，以某油田联合站DHX工艺为研究对象，通过常规㶲和高级㶲分析，确定关键设备㶲损的影响程度和相互关系，识别了㶲损降低、㶲效率提升的改进潜力。结果显示，系统中内源㶲损的占比为70.72%，可避免㶲损的占比58.86%，说明工艺设备受自身不可逆性的影响较大，且存在较大的节能潜力；通过增加回流罐、优化塔器进料结构和增加前端逐级冷却等方面进行工艺优化；优化后，可避免内源㶲损、不可避免内源㶲损、可避免外源㶲损、不可避免外源㶲损的占比分别为37.39%、30.91%、18.57%、13.13%，与原工艺相比，可避免㶲损有所降低，说明工艺改进具有明显效果。研究结果可为现场轻烃回收工艺的优化提供技术思路。
To further reveal the optimization potential and improvement direction of the gas-rich light hydrocarbon recovery process and understand the energy consumption level of process equipment, this paper takes the DHX process of an oilfield joint station as the research object to determine the influencing degree and interrelationship of exergy loss in key equipment by conducting conventional and advanced exergy analysis. Meanwhile, the improvement potential of exergy loss reduction and exergy efficiency increase is identified. The results show that in the system, exergy loss accounts for 70.72%, while the proportion of avoidable exergy loss is 58.86%, indicating that process equipment is greatly affected by irreversibility and has great energy conservation potential. Additionally, the process is optimized by increasing the reflux tank, optimizing the feed structure of the tower, and increasing the step-by-step cooling at the front end. After optimization, the proportions of avoidable internal exergy loss, unavoidable internal exergy damage loss, avoidable external exergy loss, and unavoidable exergy loss are 37.39%, 30.91%, 18.57%, and 13.13% respectively. Compared with the original process, the avoidable exergy loss is reduced to some extent, indicating that the improved process is effective. The research results can provide technical ideas for the optimization and adjustment of the on-site light hydrocarbon recovery process.