现代炼油厂中的阀门驱动和控制

The Jamnagar Refinery is the largest in the world. Rotork installed thousands of actuators during the original construction of the site. Since then, the refinery has expanded further and Rotork has provided additional products and services. Rotork actuators are essential to the reliable operation of the refinery.

The Reliance refinery at Jamnagar in India is one of the largest single refinery sites in the world and virtually all of its valves are motorised with Rotork actuators. Almost 3,000 Rotork IQ intelligent valve actuators were installed during the construction of the original refinery, tank farm and power station in the late 1990s, together with a Rotork Pakscan™ 2E 2-wire digital control package comprising 50 separate主站and bus loop networks, making it the largest Pakscan site in the world.

2008 witnessed the completion of the Reliance Expansion Project at Jamnagar with over 1,800 Rotork IQ actuators had to be installed with 37 of the latest Pakscan P3主站。从最早的日子开始，Rotork参与了Reliance项目。Rotork的智商智能致动和PAKSCAN技术的功能对原始炼油厂的仪器设计师特别有吸引力，以及用于操作和维护炼油厂的增强的执行器和PAKSCAN控制功能是为扩展项目选择Rotork的重要考虑因素。

在1997年的最初施工阶段中，旋转式被选为唯一的电动执行器供应商。Rotork是唯一一家致电制造商，可以通过在国际石化工业中证明的执行器提供无侵入性的无电缆设置，调试和数据传输技术。智商智能执行器在1993年推出时通过红外线链接向手持设置工具开创了非侵入性数据通信。到1997年，它已成为Rotork的旗舰产品，这占该公司大部分全球电力执行器销售。

委托智商执行器而无需删除电气盖以设置旅行开关和扭矩设置的能力使调试过程更加有效，同时确保内部电子组件被永久保护，免受水分或灰尘的污染，并确保长期可靠性的可靠性。在环境挑战性的条件下，例如在印度西北海岸发现的条件。

有了Pakscan，Rotork已经有了很长的记录。最初的PAKSCAN 2线控制系统于1986年启动，而Reliance订购的PAKSCAN 2E是第三代版本，该版本已经生产了五年，因此拥有广泛的最终用户参考列表，该列表无与伦比。市场。

Reliance还认识到，PAKSCAN为他们提供了专门为阀执行器设计的数字控制系统，并且具有针对执行器的功能，这些功能是其他设计中无法使用的。例如，在不中继器的情况下，最多可以长达20公里的可容忍现场网络上的240个执行器的能力是在炼油厂和坦克农场宽敞的环境中的重要可靠性和经济考虑因素。中继器需要单独的电源，可以降低数据传输速度并引入单点故障。当然，中继器的失败将导致与所有下游场单元失去通信。

PAKSCAN提供双主机通信路径作为标准配置，并能够隔离任何基于字段的故障而不中断循环中其他单元的通信。实际上，PAKSCAN的配置可在每个区域（从阀门到控制室）提供内置的冗余，以确保阀门位置，状态和状况的主机DC的重要信息尽可能安全且尽可能可用。

到1997年，Pakscan已经成功地与所有主要DCS供应商（包括Honeywell，Allen Bradley，Abb，Abb，Yokogawa和Foxboro）成功实现了托管互操作性，从而增强了信心。PAKSCAN使用与Foxboro使用的Modbus通信协议相同，Foxboro的智能自动化（IA）系统随后在网站上引入。

The Reliance Jamnagar refinery came on stream on target in 2000 as the world's largest grassroots refinery with a production capacity of 33 million tonnes per annum.

扩展项目的新订单
最初的Jamnagar炼油厂的调试与在相邻地点建造第二个基层炼油厂之间的时间是简短的，但是在此期间，Rotork推出了新一代的智商执行器和PAKSCAN 2线控制系统，这些系统都是订购新炼油厂。在这两种情况下，都对设备的功能和用户友好性进行了改进，以促进资产管理水平提高并减少工厂维护。

The IQPro non-intrusive intelligent design, includes the IQT direct drive part-turn version providing a more compact solution for the motorisation of ball, butterfly and plug valves. All IQPro actuators are equipped with a data logger to record historical operating data and valve torque profiles. This data can be extracted from the actuator and analysed on a PC running Rotork IQ-Insight software to quickly evaluate operational issues and valve performance. Effective asset management programmes can be implemented and unexpected plant interruptions minimised.

改进的通信
旋转's non-intrusive infrared data communication technology was also further developed with the IQPro by the introduction of bidirectional communication between the actuator and the handheld setting tool. The tool enables actuator configuration data to be retrieved and retransmitted to other actuators, with the potential to save immense amounts of time when many valves require near identical commissioning settings. Up to 10 configuration files and four data logger files can be downloaded and stored in the IQ Pro setting tool at a communication speed between actuator and setting tool that is 10 times faster than before.

Radically enhanced communication capacity is also one of the features of the Pakscan P3, Rotork's 2-wire control system. 37 Pakscan P3 Master Stations were ordered to monitor and control the majority of the IQ and IQT actuators that were installed, once again linked to a Foxboro IA host system.

The Pakscan P3 introduced substantial upstream information improvements, including Ethernet connectivity, a built-in secure web server and time synchronisation, together with data logging of host messages, field unit commands and changes in status with email notification of alarm conditions. Master Station host communications have been enhanced to include two serial ports, two Ethernet host ports and an additional Ethernet configuration port. Using Ethernet, up to 10 hosts can be simultaneously communicating with the Master Station.

已添加了Modbus TCP协议以促进以太网通信，而Web浏览器则使用标准网页提供了从主站和近乎触觉速度的现场控制单元中对所有数据的访问。该数据包括现场诊断，使维护团队能够确定办公桌上的任何故障，而不是在现场上，而警报条件的自动电子邮件生成也可以配置为立即对主机站点的警告。

日志记录主机消息，包括原始命令源以及时间和日期信息以及主站答复，启用事件的完整可追溯性，可从Web浏览器或主站本身的HMI获得。所有这些功能都受到高度安全性的保护，从而使对系统的访问受到主机端口和IP源地址的限制。

The Pakscan P3主站已经引入了带有图标的图形颜色显示，以表示菜单和设置，在某些屏幕上，这些屏幕上充斥着不断更新的文本消息。导航是通过一组简单的按钮。

The Pakscan P3主站保留2E版本的所有功能，并与先前的安装完全兼容。P3添加了无环的数据功能，使场控制单元通过主站进行参数化，并进行了改进的循环通信协议，从而仅发送一次到同一设备的多个命令，从而减少总线流量和增加系统响应。

Reliance合同是新PAKSCAN P3控制系统最重要的单订单之一，该系统被证明是一种非常流行和可靠的旋转产品，尤其是在石油，天然气和石化工业中。现在，使用PAKSCAN P3系统指定了越来越多的电力和流体动力执行器。