Introduction
Both bulk and finished inventories are stored in distributed tank farm remote from the site operations. These are difficult to instrument due to the infrastructure cost involved. These are then monitored daily by patrol rounds. While effective, this method does require a large skilled labor force to monitor all of tanks. This can impose an additional risk when the stored medium is of a hazardous nature.
Benefits
- Improved quality of measurements (accuracy, frequency & elimination of potential human error)
- Increase safety by removing the operations such as patrol from a potentially dangerous environment
- Elimination of field wiring and associated installations costs
- Digging of a trench is a not required when deploying wireless instruments
- Reduced maintenance effort, battery life of 10 years with 30sec updates can be realized
Requirements
To provide a live hydrostatic measurement of a bulk product receiving tank. The tank is an open vessel, vented to atmosphere.
Solution
A direct mount wireless level transmitter was installed on the existing tapping for the mechanical gauge. The wireless gateway was installed at the control room, some 300m distant.
Result
The tank level monitored remotely over a period of 2 years to prove the quality of the solution. An RSSI of -83dBm and PER of 0% were achieved.
Conclusion
Significant cost savings were realized whilst also improving the quality and safety of the required measurement. The customer is now looking to expand the wireless network to other vessels to improve the visibility of their bulk inventories.
For close vessel applications with or without a Nitrogen gas blanket, you can use either the EJX110B differential pressure transmitter or EJX118B diaphragm sealed differential transmitter. These allow you to measure both the level and blanket pressure independently with just one device.
Industries
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Chemical
Chemical plants rely on continuous and batch production processes, each posing different requirements for a control system. A continuous process calls for a robust and stable control system that will not fail and cause the shutdown of a production line, whereas the emphasis with a batch process is on having a control system that allows great flexibility in making adjustments to formulas, procedures, and the like. Both kinds of systems need to be managed in available quality history of product, and to be able to execute non-routine operations. With its extensive product portfolio, experienced systems engineers, and global sales and service network, Yokogawa has a solution for every plant process.
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Petrochemical
Petrochemical companies’ needs are extremely diverse. To come out ahead in today’s highly competitive marketplace, producers are striving to improve quality and productivity. Yokogawa provides tailor-made solutions for these needs based on its long and wide-ranging experience in this field.
Related Products & Solutions
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EJX110B Wireless Differential Pressure Transmitter
The high performance wireless differential pressure transmitter EJX110B features a single crystal silicon resonant sensor and is suitable to measure liquid, gas, or steam flow as well as liquid level, density, and pressure.
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YFGW410 Field Wireless Management Station
YFGW410 Field Wireless Management Station has system manager/security manager/gateway function based on ISA100.11a, and combining this with Field Wireless Access Point(YFGW510) and/or Field Wireless Media Converter(YFGW610) composes the field wireless system.
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YFGW520 Field Wireless Access Point
YFGW520 Field Wireless Access Poin has backbone router function based on ISA, and combining this with Field Wireless Management Station (YFGW410) and/or Field Wireless Media Converter (YFGW610) composes the field wireless system.
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YFGW710 Field Wireless Integrated Gateway
YFGW710 Field Wireless Integrated Gateway comply to the wireless communications standard ISA100.11a for industrial automation of International Society of Automation (ISA), and relays ISA100 Device data to the system via integrated backbone router. Single unit of YFGW710 has integrated functions of backbone router, system manager, security manage, and gateway.
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Field Wireless
The flexibility of wireless solutions enables less investment in infrastructure while providing greater insights into plant operations.