丙烯压缩机组仪控系统设计

发布时间：2017-12-28 19:20

  本文关键词：丙烯压缩机组仪控系统设计　出处：《东北大学》2012年硕士论文　论文类型：学位论文

  更多相关文章： 丙烯压缩机组 防喘振 倍频 控制系统

【摘要】：在生产过程中,仪控系统需密切监测压力、温度和振动等信息,并以此为反馈实现自动控制,对异常情况实现快速处理,保护压缩机运行稳定,防止压缩机异常振动现象出现。因此设计一个具有高可靠性,高安全等级的丙烯压缩机组仪控系统尤为重要。本论文的研究和设计来源于和兖州煤业鄂尔多斯能化公司内蒙古荣信化工股份有限公司甲醇合成装置合作的工程项目。项目所选用的冷冻站及制冷系统压缩机是沈阳鼓风机集团有限公司生产的3MCL707压缩机组,汽轮机选用了杭州汽轮机股份有限公司生产的NK40/46/20汽轮机。课题工作中首先对丙烯压缩机基本工作原理进行了剖析,研究了离心压缩机喘振机理。按照该机组的工艺要求和系统设计标准,分析了丙烯压缩机组一次仪表以及施工件的标准化选型设计方案,进行了针对该项目的丙烯压缩机仪控系统设计。在此基础上研究了丙烯压缩机组轴承振动和位移的监控和保护,设计了可以通过倍频完成开车、完成机组监测保护的系统方案。针对丙烯压机组入口介质温度低的特点,研发出适合于丙烯制冷压机组的自动温度控制方案。丙烯压缩机是由汽轮机驱动的离心压缩机,汽轮机、丙烯压缩机、干气密封里面的所有测点都要接到透平压缩机组综合控制系统,因此本文还研究了丙烯压缩机组的一些重要控制逻辑模型,根据丙烯压机组工艺流程特点,完成丙烯压机组工艺流程设计。最后,基于TRICON平台工作特点,研究了冗余控制系统的重要性、必要性及可靠性,从而完善丙烯制冷机组控制系统的设计。本文进行的丙烯压缩机仪控系统设计和提出的预防机组喘振措施,引入了快开线和防喘振线,在实际应用中减少了喘振的发生,取得了让用户满意的效果。
[Abstract]:During the production process, the information of pressure, temperature and vibration should be monitored closely, so that the automatic control can be realized by feedback, and the abnormal situations can be quickly processed to protect the compressor running stably and prevent abnormal vibration of compressor. Therefore, it is very important to design a high reliability and high safety grade of propylene compressor unit. The research and design of this thesis comes from the project of cooperation with Yanzhou coal industry Ordos energy chemical company Inner Mongolia Rongxin chemical Limited by Share Ltd methanol synthesis plant. The refrigerating station and refrigerating system compressor selected by the project is a 3MCL707 compressor unit produced by Shenyang Blower Group Co., Ltd. the steam turbine is selected by Hangzhou steam turbine Limited by Share Ltd to produce NK40/46/20 steam turbine. In the work, the basic principle of the propylene compressor is analyzed, and the surge mechanism of the centrifugal compressor is studied. According to the process requirements and system design standard of the unit, the standardized selection design plan for primary instrument and construction part of propylene compressor unit is analyzed, and the design of propylene compressor's instrument control system for this project is carried out. On this basis, the monitoring and protection of the bearing vibration and displacement of propylene compressor unit is studied, and a system plan to complete the start-up and completion of the unit monitoring and protection is designed. In view of the low temperature of the medium at the inlet of the propylene compressor, the automatic temperature control scheme suitable for the propene refrigeration compressor set is developed. Propylene compressor centrifugal compressor is driven by steam turbines, steam turbines, propylene compressor, dry gas seal all measuring points inside have received the turbine compressor control system, so this paper also studies some important control logic model of propylene compressor unit, according to the process characteristics of pressure propylene, complete the design process of propylene compressor. Finally, based on the working characteristics of TRICON platform, we studied the importance, necessity and reliability of redundant control system, so as to improve the design of propylene refrigeration unit control system. The system design and put forward the prevention measures of propylene compressor surge set the instrument control, introduces the fast line and anti surge line, in the practical application to reduce the occurrence of surge, has achieved satisfying effect.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH45
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本文编号：1347109