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In July 2012, our company successfully designed the storage tank information management system for the Shell Unified Beijing factory, which was put into use and worked well.
Project Background
According to Shell’s unified Beijing area requirements, the 46 storage tanks in the first and third stage tank farms have no liquid level display and alarm system, and personnel frequently go up and down the storage tanks during oil unloading, oil dumping, and daily inventory operations. There is a high HSSE risk at the same time There are also differences in manual inventory data. By installing a liquid level display and alarm system, the frequency of personnel getting on and off the storage tank is reduced, the accuracy of inventory measurement is improved, and the standardized management of the tank area is realized.
System composition
physical architecture
In this storage tank liquid level detection design project, it is necessary to consider connecting 46 network nodes, and to sample data and alarm control for each node in real time; these storage tank network nodes are concentrated in three different areas, and the single area is within 1,000 square meters. , there are dozens of nodes at most, and the straight-line distance between different areas is about 500 meters. Each area is set up with an information summary alarm control station, and the network has one more important requirement: each network node has data stability and work reliability. have higher requirements.
According to the above requirements of the project, taking into account the design cost, production cost, reliability, maintainability and other factors, we consider using the “equipment network – information network” approach to build the entire network.
In a single area, the equipment network is constructed by CAN-bus network, which has low overall cost, meets the requirements of safety and reliability, and is reliable in application and easy to maintain; all network nodes in a single area are aggregated into one information aggregation station, and then divided into areas It communicates with the server through the CAN-bus network, and the server will be connected to the enterprise local area network, so that the information monitoring and alarm system can be accessed from any position within the enterprise network.
The overall scheme deployment diagram is as follows:
The system consists of monitoring and management center, data summary control station, and tank information collection station, which realizes data collection, processing, storage and other functions. stable and reliable.
software part
general description
Shell unified storage tank information management system is based on the application of computer network communication, database, information management and other technologies to process, analyze, alarm, display the data collected by the liquid level monitoring system of each storage tank in the irrigation area, and record the history. Sexual preservation. Count the storage and usage of each storage tank, and generate corresponding charts and curves. So as to realize the perfect, effective and standardized management and control of each storage tank, and improve the work efficiency of equipment and personnel.
Function description
According to the requirements of the monitoring system, the system software provides the following basic functions:
◆ Various statistics, calculation and data storage functions for real-time data collection, processing and historical data of each storage tank.
◆ Complete monitoring management, scheduling, oil consumption statistics, cost accounting and other functions, and automatically generate relevant daily, monthly and annual reports.
◆ Complete equipment information query, input, analysis, statistics and query of equipment failure and maintenance status, statistics and query of effective operation rate, etc., and automatically generate relevant reports.
◆ Real-time graphic display of liquid level of each storage tank in the whole plant area, dispatch alarm and emergency solution functions.
◆ Realize operator authority management, responsibilities and rights distribution, emergency dispatch, SMS alarm, and network real-time monitoring.
◆ It can automatically collect the parameters of field equipment operation under unattended conditions, so as to play the role of real-time monitoring and data analysis.
◆ Set permissions for the system, and realize management at all levels according to different permissions.
◆ Provide data interface with other systems, which can be connected with other systems, such as OA, ERP, financial system.
◆ According to the needs of the site, if there is no developer, the site staff can add development or secondary development by themselves.
◆ Through the connection of the Gigabit network of the whole plant, the data sharing of the whole plant is implemented.
System management software structure diagram:
Software related pictures:
On-site physical map:
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