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在石化行业中,一些老装置,如常减压、催化裂化、分子筛等装置,需要技术改造,引入高技术进行监测,控制与优化工作,以提高经济效益。目前,一些厂家引进集散系统,如美国的FoxBoro,Taloy等集散控制系统进行监测与控制,但价格昂贵,另一方面,由于其技术资料对用户保密,给以后的二次开发工作带来困难。如采用STD BUS工业控制机与工业PC机组成两级系统,不仅配置灵活方便,功能强,利于维护和扩展,而且这种由STD BUS与工业PC组成的两级系统可以同车间装置中现有的一些二次仪表实现硬件冗余,提高了安全性,可靠性。它的优点还为今后的生产与优化工作提供了方便。因此,具有很高的性能价格比。
In the petrochemical industry, some old devices, such as vacuum depressurization, catalytic cracking and molecular sieve, require technological transformation and introduction of high-tech monitoring, control and optimization to improve economic efficiency. At present, some manufacturers introduce distributed systems such as FoxBoro, Taloy and other distributed control systems in the United States for monitoring and control, but they are expensive. On the other hand, due to confidentiality of users’ technical information, difficulties arise in the secondary development afterwards. Such as the use of STD BUS industrial control machine and industrial PC machine composed of two-stage system, not only flexible and convenient configuration, powerful, conducive to the maintenance and expansion, but also by the STD BUS and industrial PC composed of two-stage system with existing plant equipment available Some secondary instruments to achieve hardware redundancy, improved safety and reliability. Its advantages also facilitate the future production and optimization work. Therefore, with a high cost performance.