Product category:
Level and tank contents instrumentation
News Release from: Emerson Process Management | Subject: Rosemount 3300 radar
Edited by the Processingtalk Editorial
Team on 01 September 2003
Emerson radar measures oil/water
interface levels
The Rosemount 3300 radar-based liquid level and interface measurement transmitter is saving money for refineries that use oil/water separator tanks and sumps, and providing improved performance
The Rosemount 3300 radar-based liquid level and interface measurement transmitter is saving money for refineries that use oil/water separator tanks and sumps The innovative guided wave radar technology is robust, and uses no moving parts, contrasting with the previous instrumentation used on such separators that typically use a moving displacer, balanced to float between the liquids at the interface level
This article was originally published on Processingtalk on 29 Aug 2008 at 8.00am (UK)
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These displacer systems require frequent cleaning and adjustment.
A refinery in the US Midwest found replacement of their old displacer units with the new Rosemount 3301 guided wave radar transmitter to be very simple.
The new transmitter probe was simply installed into the original displacer chamber using the appropriate flange.
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The radar transmitter, in an explosion-proof housing, is a standard loop powered device that used the existing wiring of the original transmitter, sending back oil water interface measurements.
In this application, the radar probe is permanently immersed in liquid, and is used to control the interface position only.
In Gothenburg, Sweden, the Preem Refinery installed a Rosemount 3302 level and interface measurement transmitter on a waste sump.
The sump collects and separates oil and water from all the refinery waste.
The installation used a rigid twin lead probe, that operates efficiently directly in the sump.
The loop-powered system uses HART communications to transmit the data back to the control room, where level and interface measurements are monitored.
In both the refineries, the engineers have been pleased with the simple, easy installation of the Rosemount radar, using two wire connections, and the subsequent reliability of the units over time.
With no moving parts, frequent cleaning out of residues in the displacer chamber is not critical: this refinery has been able to reduce the frequency of the shutdowns needed for such cleaning.
In the sumps, the reliable measurement of the top surface level has eliminated all overflow incidents.
The separators accept oil inputs from several different sources, leading to variations in the density of the oil monitored.
With the original displacer system, this had led to inaccuracies in measurement, and then discharge of valuable oil to waste, which also put a higher load on the water processing unit.
The Rosemount radar system tolerates such density variations in the oil, maintaining measurement accuracy.
This produces further financial benefit, because all the oil is returned for reprocessing, and less oil is passed into the effluent water treatment plant, reducing total treatment costs. Request a free brochure from Emerson Process Management ...
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