制冷剂压缩机组ICS TRUSTED控制系统的开发

发布时间：2018-09-06 07:15

【摘要】：制冷剂压缩机在液化天然气工业中具有重要地位,过去我国制冷剂压缩机长期依赖进口,从上个世纪70年代开始,沈鼓自控公司就开始向制冷剂装置用压缩机的研发迈进,相继开发了数十项具有国际先进水平的新技术,先后为大庆、上海、茂名等地的企业提供了大型制冷剂装置用压缩机组的单机,产品达到世界先进水平。制冷剂压缩机有气体处理量大、体积小、结构简单、运行平稳以及其压缩气体不受润滑油污染等优点.但也有它本身固有难以克服的缺点,如不适用于气量小的场合、稳定工况区狭窄、易喘振等等。整个装置的安全性、可靠性和可利用性不仅仅取决于压缩机本身的性能,而且还取决于其控制系统的性能,其控制系统的可靠性直接影响投资巨大的后续成套装置是否能安全运行,因此如何有效可靠设计压缩机的控制系统,保证系统在各种负荷下安全可靠运行,减少设备故障引起的非计划性停车是整个机组自动化控制系统中的关键问题。本课题以河南京宝新奥新能源有限公司制冷剂压缩机的控制系统为开发对象,完成了控制系统的架构设计,提出了一套离心压缩机综合控制策略,较全面地考虑了压缩机运行中可能发生的因素,使能源有效利用,解决在不同工况下,压缩机防喘振控制的优化问题,不但使用可变极限流量法,而且采用调节转速的办法来保证压缩机的负荷满足工艺上的要求。在此基础上,开发了基于Intouch10.1软件的压缩机运行监控画面,该监控系统功能齐全,操作简单,人机界面友好,其中包括测点清单、报警画面、联锁画面、工艺画面、开车画面等,在开车画面中列出了盘车逻辑等,对压缩机系统的稳定运行起到了积极的作用。通过研究,可以看出大型压缩机控制系统的发展还有很大的空间,可变极限流量法将成为防喘振控制的主要算法,实现对汽轮机的调速等各种联锁停车以及油泵自启等功能的预先监测,并提前做好处理,能够保护机组,保证正常生产。
[Abstract]:Refrigerant compressors play an important role in the liquefied natural gas industry. In the past, our refrigerant compressors relied on imports for a long time. Since the 1970s, the Shenyang Drum Autocontrol Company has begun to make progress towards the development of refrigerant compressor for refrigerant units. Dozens of new technologies with international advanced level have been developed one after another. Enterprises in Daqing, Shanghai, Maoming and other places have provided a single unit for large refrigerant units, and the products have reached the advanced level in the world. Refrigerant compressor has the advantages of large gas treatment, small volume, simple structure, stable operation, and its compressed gas is not polluted by lubricating oil. But it also has its inherent and insurmountable shortcomings, such as not suitable for the situation of small volume of gas, narrow stable working conditions, easy surge and so on. The safety, reliability and availability of the entire unit depend not only on the performance of the compressor itself, but also on the performance of its control system, The reliability of the control system has a direct impact on the safety operation of the follow-up units with huge investment, so how to design the control system of the compressor effectively and reliably to ensure the safe and reliable operation of the system under various loads, Reducing unplanned parking caused by equipment failure is a key problem in the whole automatic control system. Taking the control system of refrigerant compressor of Henan Jingbao Xinao New Energy Co., Ltd as the development object, the structure design of the control system is completed, and a set of integrated control strategy of centrifugal compressor is put forward. The factors that may occur in compressor operation are considered comprehensively to make effective use of energy and to solve the optimization problem of anti-surge control of compressor under different working conditions, not only by using variable limit flow method, but also by using variable limit flow method. And the method of adjusting speed is adopted to ensure that the load of compressor meets the requirements of process. On this basis, the compressor running monitoring screen based on Intouch10.1 software is developed. The monitoring system has complete function, simple operation, friendly man-machine interface, including measuring point list, alarm screen, interlock screen, craft picture, driving screen, etc. In the driving screen, the logic of the wheel is listed, which plays a positive role in the stable operation of the compressor system. Through research, we can see that there is still a lot of room for the development of large compressor control system. Variable limit flow method will become the main algorithm of anti-surge control. In order to protect the unit and ensure the normal production, it can realize the pre-monitoring of various interlocking shutdown functions such as speed regulation of steam turbine and the self-start of oil pump, and do a good job of handling in advance.
【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;TP273

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