Experts in Chemical Feed and Water Treatment X 1-888-709-9933 X www.prominent.ca Caustic 09/13/CA Printed in Canada Caustic Injection Packages POINTS OF APPLICATION FOR TYPICAL SAGD PROCESS Upstream of Warm / Hot Lime Softener (WLS / HLS) Process, into De-oiled Produced Water – 0.05% – 0.125 %, estimated dose. DESCRIPTION OF USE Caustic is added inline ahead of the WLS process controlled by pH of the incoming de-oiled produced water. The pH of the WLS process is critical to the formation of precipitate and removal of hardness and also important to the effectiveness of the coagulants and flocculants being added to the WLS process. Typically these pumps are paced via a pH signal of also with flow rate of the incoming process line and the resulting pH is on the alkaline side (8.0 – 9.0 pH) DESIGN CRITERIA Typical Flow Range / Nominal Phase of Project – 0.010 – 0.150 m3 / hour in typical applications. Typical Pressure Range – 10 bar / 145 psig maximum design pressure. Recommended Pumping Device Due to the range of flows and expected pressures a positive displacement API 675 metering pump is the best solution for these applications. The pump should be provided with a hydraulically actuated double diaphragm with electronic diaphragm rupture detection to annunciate rupture and shut down the pump in the case of a diaphragm failure. As the addition of this material is critical to the successful operation of the lime softening process it is imperative that a hot backup pump be designed into the overall package. Pump head materials should be 316 SS with Teflon diaphragm. Consultation with the manufacture of the pump should be made in the selection of elastomers / seals. Pump control should be design through adjustment of the speed of the pumping device. A VFD ready motor shall be provided with each pump as motor speed adjustment provides quick response to flow changes, limits overdosing of chemical and decreases wear on internal pumping components. Caustic can form crystallization on pump check valves over time preventing them from seating correctly. If this is the case then consideration to a rotating cone check valve should be made due to the designs self-cleaning ability. These valves can be found on the ProMinent Orlita MfS series pumps. Piping Materials / Compatibility All materials in contact with the fluid are typically 316 SS materials with EPDM seals. Connections / package construction can be of tubing or welded pipe. Line sizes are generally ¾” to 1” in diameter for these flow ranges. All components on the system shall have CRN registration and MTR reports. Package registration to ABSA is not required unless directed by the client as the fluid is non- expansive, however final design should be reviewed and stamped by registered engineer in accordance with ASME 31.3 to confirm proper selection of materials. All welding and fabrication shall be completed in an approved ASME 31.3 shop with qualified personnel. Consideration to temperature should also be made. As caustic has two freezing points if the minimum design temperature is below 10 °C the lines should be heat traced and insulated to keep the product from freezing. If this is the case the piping system should be welded to mitigate and potential leakage and threaded fittings on the system should be kept to a minimum.
Transcript
Experts in Chemical Feed and Water Treatment
X 1-888-709-9933 X www.prominent.ca
Caustic 09/13/CAPrinted in Canada
Caustic Injection Packages
POINTS OF APPLICATION FOR TYPICAL SAGD PROCESS Upstream of Warm / Hot Lime Softener (WLS / HLS) Process, into De-oiled Produced Water – 0.05% – 0.125 %, estimated dose.
DESCRIPTION OF USECaustic is added inline ahead of the WLS process controlled by pH of the incoming de-oiled produced water. The pH of the WLS process is critical to the formation of precipitate and removal of hardness and also important to the effectiveness of the coagulants and flocculants being added to the WLS process.Typically these pumps are paced via a pH signal of also with flow rate of the incoming process line and the resulting pH is on the alkaline side (8.0 – 9.0 pH)
DESIGN CRITERIA � Typical Flow Range / Nominal Phase of Project – 0.010 – 0.150 m3 / hour in typical
applications. � Typical Pressure Range – 10 bar / 145 psig maximum design pressure.
Recommended Pumping Device Due to the range of flows and expected pressures a positive displacement API 675 metering pump is the best solution for these applications. The pump should be provided with a hydraulically actuated double diaphragm with electronic diaphragm rupture detection to annunciate rupture and shut down the pump in the case of a diaphragm failure.As the addition of this material is critical to the successful operation of the lime softening process it is imperative that a hot backup pump be designed into the overall package. Pump head materials should be 316 SS with Teflon diaphragm. Consultation with the manufacture of the pump should be made in the selection of elastomers / seals.Pump control should be design through adjustment of the speed of the pumping device. A VFD ready motor shall be provided with each pump as motor speed adjustment provides quick response to flow changes, limits overdosing of chemical and decreases wear on internal pumping components.Caustic can form crystallization on pump check valves over time preventing them from seating correctly. If this is the case then consideration to a rotating cone check valve should be made due to the designs self-cleaning ability. These valves can be found on the ProMinent Orlita MfS series pumps.
Piping Materials / Compatibility All materials in contact with the fluid are typically 316 SS materials with EPDM seals.Connections / package construction can be of tubing or welded pipe. Line sizes are generally ¾” to 1” in diameter for these flow ranges.All components on the system shall have CRN registration and MTR reports.Package registration to ABSA is not required unless directed by the client as the fluid is non-expansive, however final design should be reviewed and stamped by registered engineer in accordance with ASME 31.3 to confirm proper selection of materials. All welding and fabrication shall be completed in an approved ASME 31.3 shop with qualified personnel.Consideration to temperature should also be made. As caustic has two freezing points if the minimum design temperature is below 10 °C the lines should be heat traced and insulated to keep the product from freezing. If this is the case the piping system should be welded to mitigate and potential leakage and threaded fittings on the system should be kept to a minimum.
Safety Relief Valve Selection – Safety relief valves should be sized for blocked flow / blocked discharge conditions. Relief setting should be 15-20 % of maximum pump pressure. Wetted components of the valve shall be 316 SS, with CS non-wetted parts. Valve connections should be flanged to allow for easy removal of the valve for testing, and reconfiguration. Discharge from the relief valve should be run back to the pump suction upstream of the tank isolation valve so fluid in the relief line does not affect the pump calibration, or directly back to the tank. All relief lines should be sloped to that chemical does not stagnate in these branches. Drain and flush connections should be provided so that chemical can be drained and cleaned for service of main system components. All instruments should be equipped with block and bleed valves so that they can be removed for service.
Pulsation Dampener – If discharge lines from the pumping system to the injection point are longer than 20 meters a pulsation dampener should be used to smooth out pulsation impulses on the discharge lines and to inhibit leaks on fittings and piping fatigue. Pulsation dampeners should also be used if a flow measurement device such as a Coriollis Meter is being used on the pump package to confirm and adjust flow rate of the pump itself as these meters require a smooth flow. Wetted components on the dampeners shall be 316 SS and EPDM, as these materials regardless of temperature should be fine for service with caustic.
Flow Measurement – There are a number of technologies used to measure the flow output of the metering system reliably. Selection of a proper flow measurement device should be done with the equipment manufacturer to account for accuracy over the full range of service. Typical technologies are gear or piston type mechanical meters, or Coriollis type flow meters for the ranges or flows experienced. Special consideration must be given to the expected viscosity range of the fluid during selection.
Pressure Control Valve – Pressure control devices are used downstream of the pump if the injection pressure is expected to vary. A PCV determines the operating pressure of the system and maintains a consistent back pressure so that the system pulsation dampener (if required) can be properly tuned. If the downstream pressure is not expected to fluctuate and greater than 30 psig then a PCV is not required for this package. Wetted materials for the pressure control valve should be 316 SS, connections should be flanged for welded systems to allow for maintenance and removal.
Calibration Column – A vented graduated calibration column shall be provided on the suction side of the pumping package to allow for manual calibration of the system. In order to work accurately isolation from the tank should be provided. The column should be installed so that it can gravity fill from the storage tank, thus the high level of the column should be within the tank level. The calibration column is not a pressurized vessel and as a result does not require a CRN. The calibration column should be sized for at least 30 seconds of pump design flow and graduated to show total volume pumped in a given time period. Wetted materials of the calibration column should be 316 SS with glass site.
Pressure Gauge – Pressure gauge with 316 SS isolator should be provided on the discharge side of the skid, isolation with double block and bleed should also be provided to allow for proper gauge maintenance and testing as required.
DESIGN, EXAMINATION, INSPECTION & TEST REQUIREMENTS: ASME B31.3, 2010 EDITION.
2. ALL EXTERNAL INTERCONNECTING PIPE, FITTINGS AND WIRING BY OTHERS.
3. AREA CLASSIFICATION: NON-HAZARDOUS.
4. SEAL MATERIAL FOR 50%NaOH IS PTFE AND EPDM.
5. PRESSURE GAUGE CAN STAND OVER PRESSURE TO 1.5 FULL SCALE FOR SHORT PERIODS OF TIME.
6. ALL DRAIN VALVES HAVE MIXED ENDS SW x FNPT.
7. "INVERTER DUTY MOTOR" MUST BE STAMPED ON THE MOTOR.
8. ALL COMPONENTS SHALL BE ELECTRICALLY HEAT TRACED AND INSULATED. FOR INSULATION ARE
USED REMOVABLE COVERS MADE FROM SILICONE IMPREGNATED FIBERGLASS CLOTH WITH 2" THK
MINERAL FIBRE. TRACING HOLD TEMPERATURE SHALL OF 40-42 DEG.C. DRAINS COLLECTION
HEADER-TP03 IS NOT TRACED AND INSULATED.
9. ALL FLANGE CONNECTIONS ARE PROVIDED WITH PLASTIC SPRAY FLANGE SHIELDS.
CUSTOMER
ENGINEERS SEAL
TITLE
SUBJECT
REV DATE
RProMinent
FAX. 412 787 0704
PITTSBURGH P.A., USA. 15275
PROMINENT FLUID CONTROLS LTD.
SHEET SIZE D
Scale based on:
2010601209-206
FAX. 519 836 5226
PROMINENT FLUID CONTROLS LTD.
THE PROMINENT GROUP OF COMPANIES
GUELPH - ONTARIO - CANADA
490 SOUTHGATE DRIVE.GUELPH, ONTARIO, CANADA
TEL. 519 836 5692
DESIGNED
CHECKED
DRAWN
N1H 6J3
RIDC PARK WEST
APPROVED
136 INDUSTRY DRIVE,
TEL. 412 787 2484
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REV
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REVISIONS
DESCRIPTION BY REVDAPPD
THIS DRAWING IS THE PROPERTY OF PROMINENT FLUID CONTROLS LTD. AND SHALL NOT BE COPIED ORTRANSFERRED WITHOUT THE WRITTEN CONSENT OF PROMINENT FLUID CONTROLS LTD.
