Flow Level Pressure 39
fed from the coker to the fractionating tower even reaches 360°C. On the three other measuring points fitted with FLUXUS®
temperatures, the ultrasonic transducers were installed on the WaveInjector®
, temperatures of 165°C to 190°C are reached. Due to the high . The operating
principle of FLEXIM‘s patented mechanic equipment is convincingly simple: the WaveInjector® thermally insulates the transducers from the hot pipe, but also ensures the best acoustic contact at the same time. Heat is radiated via large steel plates so that the temperature on the fastening points for the transducers is in their working range. Coupling plates ensure the best possible acoustic contact at the same time. The sturdy installation equipment provides continuously high contact pressure on the supporting surface. Specially adapted metal foils guarantee an optimal connection and long-term stability.
Temperature gradation in the WaveInjector
On the Gelsenkirchen coker, five flow measuring points were set up with FLEXIM’s FLUXUS® ultrasonic flowmeters. All FLUXUS®
ultrasonic
Non-invasive high temperature flow measurement: the WaveInjector® extends the application range of clamp- on technology to temperatures of up to 400°C
flowmeters work according to the transit-time difference method: because an ultrasonic signal spreads slower upstream than downstream, the volume flow rate can be calculated accurately from the transit-time difference and the geometric pipe parameters. Once the relationship between temperature and medium density is known and the temperature on the measuring point is either
constant or recorded, it goes without saying that it is possible to calculate the mass flow. The FLUXUS®
ADM 8027 measuring transducer is explosion-proof and certified for use in
potentially explosive areas (ATEX zone 1). The ultrasonic transducers used are also explosion-proof. Heavy gas oil has a temperature of 350°C when entering the furnace and the mass flow which is
New Coriolis Flowmeters
Clamp-on solution for full availability The WaveInjector®
ADM
extends the application range of clamp-on ultrasonic technology to
temperatures of up to 400°C. The known advantages of the non-invasive measurement method remain intact – no wear and tear by the medium, no risk of leakage, excellent measuring dynamics, no pipework. The measuring point can be set up during ongoing operation. There is also complete access to the pipeline after the measuring system has been mounted and there are no additional components which are exposed to the flowing medium. Another advantage of ultrasonic technology is its exceptional measuring dynamics. Because the radiated ultrasonic wave is carried by the flowing medium without any inertia, even very low flows can be reliably detected.
Reliable operation of all installations is essential for the operator of a plant which works non-stop for years at a maximum possible capacity. Unscheduled shutdown periods mean expensive losses in productivity. The big Turnaround, the scheduled shutdown of the entire system for comprehensive maintenance and repair work takes place in the Ruhr Oel Gelsenkirchen Refinery every five years. FLUXUS®
ultrasonic flowmeters with WaveInjector® were installed in the
Gelsenkirchen coker at the beginning of 2007 and have since been measuring reliably and without any interference. Maintenance costs were also considerably reduced.
Compact Coriolis Flow Meter Sensor for Compressed Natural Gas
Siemens Industry Automation Division (Germany) has developed a new coriolis flow meter sensor for compressed natural gas (CNG) applications. Sitrans FCS200 has a compact design, which allows for example the use of small and efficient dispensers.
The high capacity with a flow rate up to 500 kg/min ensures faster fuelling. Via the Siflow FC070 Ex transmitter the new flow meter sensor can easily be integrated into Simatic automation systems.
This allows a broad range of control, measurement and automation solutions for CNG distribution, compression, storage and refueling.
UK flowmeter specialist Litre Meter has expanded its range of metering options with coriolis flowmeters from US-based manufacturer Tricor.
Coriolis meters are employed in a wide range of applications worldwide in the oil and gas, petrochemical, food and beverage and life sciences sectors. Litre Meter is now able to supply the full Tricor range of coriolis instruments to its UK customers.
The meters offer a measuring accuracy of between+/- 0.10 per cent and +/- 0.50 per cent, even in long term operation and across a temperature range from -100 to +150°C depending on the meter selected. The mass flow rates that can be measured range between 300 kg/hr and 65,000 kg/hr while the volumetric flow range which can be measured is between 300 l/pm and 65,000 l/pm. Tricor coriolis meters are pressure rated up to 350 bar.
Coriolis technology works by passing a fluid towards (and away from) a centre of rotation through vibrating tubes. The force of the fluid passing through the tube causes twist which is proportional to the mass flow rate of the fluid passing through them. Sensors and coriolis mass flowmeter transmitters are used to measure the twist and generate a linear flow signal.
The Tricor product line complements the range of flowmeters built by Litre Meter in its own premises in Buckingham (UK). The company offers a broad range of metering technologies suitable for virtually every liquid, gas or steam measurement application and has particular expertise in measuring low flow rates.
Reader Reply Card No 116 WORLDWIDE LEVEL AND FLOW SOLUTIONS Reader Reply Card No 115 Thermatel® Enhanced Model TA2
measures direct mass fl ow without the need for pressure or temperature compensation. This is a “plug and play” device as it can be pre-calibrated for 1 or 2 gasses or 2 ranges and confi gured for your specifi c application.
E
European Headquarters and Manufacturing Heikensstraat 6 9240 Zele, Belgium Phone: +32 (0)52 45 11 11 Fax: +32 (0)52 45 09 93 e-mail:
info@magnetrol.be www.magnetrol.com
Reader Reply Card No 117 August / September 2011 •
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