Flowmeters eliminate cleaning

12/07/2005


Shell Chemicals, at Moerdijk, the Netherlands, operates one of Europe's largest ethylene plants, where Emerson's Vortex 8800CD dual-vortex flowmeters improved plant steam-measurement reliability. The meters provided two flow measurements on the main steam lines: one for plant process control and a separate measurement for the plant safety instrumented system.

Shell found that vortex metering delivered more reliable steam-flow measurement, increasing plant uptime. Furthermore, plant operators have a better, more accurate steam-flow measurement, allowing production optimization.

Shell's naphtha-cracker process mixes accurate proportions of light distillate feed-stock (LDF)—such as naphtha or ethane—and steam, heating them to a high temperature in a furnace, cracking the LDF into basic feedstocks like ethylene, and also creating some carbon and coke deposits, that recirculate with process water.

To remove these deposits and assure measurement reliability, a monthly cleaning schedule had been established for each flowmeter.

Engineers conducted a three-month trial with a Rosemount 8800CD on one furnace line. Thereafter all 20 furnaces were scheduled to be equipped with the dual-vortex measurement systems. The first eight furnaces have now operated for over two years, without flowmeter removal for cleaning.

For more information, visit www.GoToEmerson.com .

—Richard Phelps, senior editor, Control Engineering,
richard.phelps@reedbusiness.com





No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
Each year, a panel of Control Engineering editors and industry expert judges select the System Integrator of the Year Award winners.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Learn how to create value with re-use; gain productivity with lean automation and connectivity, and optimize panel design and construction.
Go deep: Automation tackles offshore oil challenges; Ethernet advice; Wireless robotics; Product exclusives; Digital edition exclusives
Lost in the gray scale? How to get effective HMIs; Best practices: Integrate old and new wireless systems; Smart software, networks; Service provider certifications
Fixing PID: Part 2: Tweaking controller strategy; Machine safety networks; Salary survey and career advice; Smart I/O architecture; Product exclusives
The Ask Control Engineering blog covers all aspects of automation, including motors, drives, sensors, motion control, machine control, and embedded systems.
Look at the basics of industrial wireless technologies, wireless concepts, wireless standards, and wireless best practices with Daniel E. Capano of Diversified Technical Services Inc.
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
This is a blog from the trenches – written by engineers who are implementing and upgrading control systems every day across every industry.
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Case Study Database

Case Study Database

Get more exposure for your case study by uploading it to the Control Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.

These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.

Click here to visit the Case Study Database and upload your case study.