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Oil refinery remote monitoring and control system under hazardous environments

業種 プロセス自動化
関連製品 EDS-405A/408A シリーズ
IMC-101 シリーズ
概要 A well-known global petroleum company has recently upgraded the remote control and monitoring system in its Belgium manufacturing site. The two main goals of the upgrade are to create a centralized control system, and maintain a reliable communication network. The procedure used to refine oil products requires careful attention to the temperature and pressure. In addition, by their very nature, refineries make use of inflammable materials that could be exposed to direct sunlight during the daytime.
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プロジェクト紹介


A well-known global petroleum company has recently upgraded the remote control and monitoring system in its Belgium manufacturing site. The two main goals of the upgrade are to create a centralized control system, and maintain a reliable communication network. The procedure used to refine oil products requires careful attention to the temperature and pressure. In addition, by their very nature, refineries make use of inflammable materials that could be exposed to direct sunlight during the daytime. In order to ensure the safety of the plant, systems must be well-designed so that sparks cannot reach inflammables, and it is necessary to use rugged devices for the monitoring and management system.

 

The company wanted the upgrade to provide sufficient bandwidth for all current as well as future information needs. This not only included current data supplied to a central control room for operations, engineering, and maintenance, but also a system that could support voice, video monitoring, and security infrastructure that could be expanded later when needed.

 

System Description

The control and monitoring system can be separated into seven individual units for each monitoring and control cell. For long distance communication between cells in the plant, it was decided to use a single mode fiber optic network as the communication network between key devices and the control center. The system integrator, Honeywell, used DCS for monitoring the temperature and pressure. The signal is collected and transmitted to the control room through the Ethernet communication network, which is a redundant single mode fiber network over refinery cells created by Moxa's ED6008-S-SC-T Ethernet switches. For sites that are not easily reachable, the IMC-101-S-SC-T Ethernet to fiber media converters were used to extend the communication distance.

 

Since the monitoring cells are either in or next to high temperature refinery areas, the devices used for this project are required to operate under the Class 1 Zone 2 standard. Another issue that must be considered is the reliability of the devices. The operating temperature in the cells is high, and the refinery is usually unmanned, so that in general no one will be available to troubleshoot the situation when a device fails. For this reason, the ED6008-S-SC-T and IMC-101-S-SC-T were adopted because of their rugged design, high MTBF rating, fan-less design, and extended operating temperature of -40 to 75°C.

 

Engineers now have complete control over all tank farm operations and can configure alarm settings and alerts to be notified directly or remotely when an event occurs. The communications, safety, and security infrastructure has been greatly improved, fewer people are needed to monitor the same number of storage facilities, and it is easier to add items such as remote cameras or other monitoring (I/O) devices to the network.


 

 

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