brochure In-line Oil in Water Analyser - Model OIW-EX100P and OIW-EX1000P Advanced Sensors Ltd Oil in Water Analyser System known as the OIW-EX100P or OIW-EX 1000P. The system is designed to monitor the residual hydrocarbon content of pipelines carrying produced water at oil production facilities and refineries etc. The OIW-EX100P uses laser radiation to energise the contents of the process pipe with an incident optical wavelength. A sensitive tuned detector at a different wavelength is then used to measure the stimulated fluorescence value. This fluorescence value is used to determine the proportion of hydrocarbons within the chamber. Measuring technique: The measurement technique incorporated in the Advanced Sensor s monitors is laserinduced fluorescence. The inline probe is a patented combined Optical and Ultrasonic component. The measurement probes combine two distinct technologies: Laser induced fluorescence for the oil in water measurement. The laser emission is transmitted via optical fibre from the analyzer enclosure to and through the probe. The light is then transmitted via the sapphire optical window embedded at the front of the probe into the water in the process pipe. The fluorescence from the water sample travels back through the sapphire window, along the optical fibre to the analyzer enclosure to the optical detection system. Ultrasonic transduction which provides the automatic cleaning of the probe. The sapphire window is kept clean by the ultrasonic cavitations created by the probe. It is this feature that enables the analyzer to operate without the need of routine maintenance. In-line Oil In Water analyser model EX OIW 100-P and OIW EX 1000-P Probe, umbilical cable and analyser enclosure: The In-Line type analyser (The EX100-P and EX1000-P)has a measurement probe attached to the analyser enclosure via an umbilical cable. The Probe can withstand pressures in excess of 100 Bar. The analyser s probe should be inserted into the water line via a 2 flange interface. The analyser should be wired for mains and communications and then powered up. The analyser will immediately perform measurements. Dual-stream / dual-probe: Even two measurement probes can be connected to a single analyser. The EX100P is designed for ease of installation. The EX100P unit is delivered complete, mounted on a stand (316L stainless) and ready to go. Take the unit out of the delivery packaging, wire the mains power, insert the probe and turn on. Ex d/atex: The EX100P EX1000-P are EX d rated and do not require purged air. Oil In Water (OIW) monitor schematic Probes and installation location: The lengths of the probes are not arbitrary; they must be calculated and manufactured at specific lengths. The probes can be provided at lengths suitable for any specific application, allowing the probes to be inserted into pipelines as small as 2 requiring probe lengths of 0.75m and into tanks requiring probe lengths greater than 3m. The probes must be positioned for optimum measurement detection whilst taking into consideration the wavelength of the ultrasonic frequency so that the cleaning performance is also optimised. Clear full color screen in Ex d housing
Models: OIW EX100-P: Fluorescence is measured via an optical filter and photo multiplier tube (PMT), the optical filter selected depends on the wavelength properties in the water; OIW EX1000P: Fluorescence is measured via an optical UV spectrometer. The spectrometer takes the optical fingerprint of the oil, should the oiltype change, the analyser will automatically detect the change and select the appropriate calibration file to provide consistently accurate measurement. This feature is unique to Advanced Sensors analysers. Spectrometer The in-built UV spectrometer (EX1000 only) scans the water every 10 minutes and files the results for 10 years for future investigation. The spectrometer is of great value when detailed analysis of water content is required. An installed unit was periodically reporting higher OIW concentration results than the field laboratory that used solvent extraction and IR detection. The spectrometer logs were examined during this event, and the spectra indicated the presence in the water of an interferent other than oil. Further tests were performed, and the substance causing the anomaly was identified. This led to the selection of a new wavelength range and an optical filter that was fitted to the PMT, thereby eliminating the interference. Whilst chemicals can be evaluated in the Advanced Sensors Laboratory and isolated before the monitors are delivered, the in-built spectrometer facilitates the evaluation and analysis of new chemicals or additives being introduced to the process. Operating dynamic range The dynamic range of most OIW monitors is limited to 500 ppm or a maximum of 1000 ppm TPH. The standard EX100/1000 can operate up to 3000 ppm TPH (Total Petroleum Hydrocarbons). The EX1000Advance has a direct fluorescent dynamic range of 20000 ppm OIW without any extrapolation. In the figure (right), the direct fluorescent curve for 0 to 30000 ppm OIW without any extrapolation. After 20000 ppm, the instrument flat-lines. The flat-lining in itself is a new development, traditionally as oil levels increase the fluorescence flat-lines and then falls, this can confuse an instrument in believing the oil content is falling when it is actually rising. The extended range monitor EX1000 Advance facilitates the monitoring the efficiency of separators and hydro-cyclones, providing a greater insight to process dynamics. Fluoresence scan / range Screens, parameter Settings and Configuration and remote Access
Sample flows continuously through the process pipe in front of the probe Oil built up. Oil will contaminate the sapphire window Ultrasonics activated. The sapphire window starts to vibrate Oil contamination and particles are removed from the sapphire window Oil in water being measured by measuring the intensity of the fluorescence Analysed Oil concentration is presented on screen and outputs and stored Features The Advanced Sensors OIW monitors are continuous, on-line, self-cleaning UV fluorescence detection systems. Advantages of this laser fluorescence system for monitoring OIW are many: Instead of the laser or light source having to pass across a pipe to a detector, the requirement to completely flow photons through moving water is eliminated. With the Advanced Sensors probe design the light source and detector with the specially coated sapphire window detects all Total Petroleum Hydrocarbons (TPH) or Oil and Grease (O&G) in process pipe. The range of the analysers are oil from 10ppb (parts per billion) to 20000 ppm (parts per million). The ultrasonic beam cleans the sapphire window. In the presence of sticky precipitates or from soapy emulsions, ultrasonics maintains a clean window. The Advanced Sensors technology is able to cope with system upsets, well flow variations, and solids. The homogenization mode is especially applicable to sour systems where oil coated iron sulphide solids may be present in suspension or in emulsions. For each application of this technology, UV fluorescence signatures may be obtained so that the bandwidth is specific only to dispersed oil. When chemical additives are present that overlap with the oil bandwidth, Advanced Sensors professionals are able to remotely squeeze the bandwidth tighter to ensure that the output signal is focused on oil alone. The standard communication interfaces are 4-20mA, Ethernet and ADSL (2 wire Ethernet), wireless is available as an option. The 4-20 ma is for connection to the Control room (DCS) and the Ethernet and ADSL is for connection to the company s intranet. The intranet/internet connection facilitates the connectivity to the instrument form other company locations or the advanced sensors laboratory for further diagnostic and analysis support. Data logs. PPM measurements are stored every second in daily logs as excel files, the daily logs are stored for 10 year on the instrument. The spectrometer s scans are run every 10 minutes and excel logs are also stored for 10years on the instrument. Software is provided to interrogate both data logs (LogView) and Spectrometer Logs (Span). Both LogView and Span can be utilized remotely, the software will reach down to the Monitor and extract the selected filed for investigation. Alarm levels may be set for trending or operator attention to the water treatment and processing system. The unit can also manage dual probes / dual streams to the instrument. Water Composition: Our analyzer s spectrometer monitors water composition and will generate alarms should the composition change. Proof of Performance: Operationally our analyzers provide 100% customer satisfaction year on year with no cleaning or maintenance.
Analyser OIW EX 100-P / EX 1000-P Analytical principle Range Accuracy +/- 1% Repeatability 1% Operating ambient temperature Operating conditions for sample Sample flow (minimum / norm / maximum) Sample temperature (minimum / maximum) Sample pressure (mini / maxi) Response time Cycle time Weight Footprint (W x D) UV Fluorescence Class 3 industrial Laser; selective optical filter and photo multiplier detector. Model EX 1000-P with real time spectrometer 3000 ppm Standard ( 20000 ppm enhanced) -15 ºC. to 80 ºC. No flow control or pressure regulation required 5 / 20 / 100 ltr/min 0-100 ºC. 0-12 bar (0-174 psi); Extended pressure range 0-200 bar ( 0-2900 psi) < 1 second Continuous Approx 79 Kg (enclosure plus measurement chamber & stand) Type and Qty of signal 4-20 ma Galvanic isolation (free from earth) / 1 Interface Power supply and consumption Distance between probe and monitor Internal Data Logging Tropicalized Electrical area classification certificate / N Standards Enclosure rating CALIBRATION Required Instrument Air Sample Conditioning System Process pipe connection Wetted parts Fitted with a sample take off for lab. / location. Operational Notes Model EX 1000-P; Spectrometer Specifications In-line Oil in Water Analyser - Model OIW-EX100P and OIW-EX1000P 600 x 640 mm It is recommended 500 mm be maintained at the front and rear of the unit for user access. 4-20 ma / Ethernet / RS232 & 2-wire ADSL (HART optional) 110 or 230 VAC, 50 or 60 Hz / < 300W at maximum draw. ~ 60W in normal conditions. Maximum 3 meter >10 years Yes ATEX Ex d II 2 G Ex d IIB T4 EN61010-1:2001 Safety requirements for electrical equipment for measurement, control and laboratory use UL Class 1 Div 1 IMO Approval to MEPC 107(49) US Coast Guard Type Approval CRN s for Canadian provinces Ingress Protection IP65 Annual Inspection Not required Integrated Ultrasonic Transducer 2" 316L 150lb RF ANSI Standard. / see drawings Our analyzers wetted parts are 316l as standard and optionally 22CR and 25CR (Chrome Duplex). No Self cleaning In-line Independent of turbidity or bubbles Viewing window integrated in probe Network multiple units to Control Centre Integration time: 1 ms -10 seconds Measuring range: 475-1025 nm Dynamic range: 2 x 10 8 Sensitivity: 3 x 10-17 watts / 1-second integration Signal/noise / Dark noise 250:1 (at full signal) / 50 (RMS) Resolution: 1,5 nm Stray light: < 0,05% at 600 nm
Specifications are subject to change by manufacturer or ODS without notice due to modifications or improvements revision: 2011-04