Horizontal Falling Film Brine Concentrator

Transcription

1 Horizontal Falling Film Brine Concentrator The 3rd International Sede Boqer Conference on Water Technologies, 2012: Advanced Technologies in Water Management Tuesday 16 October 2012 Dr. Yony Weiss, VP, Thermal CTO

2 IDE Technologies Ltd Overview Established in 1965 Headquartered in Israel with fully owned subsidiaries in China, India and the U.S. Owned by two large holding companies: ICL Ltd (50%) and Delek Group Ltd (50%) World leader in thermal and membrane water treatment with unique proprietary technology Strong engineering and water expertise Track record of excellence in delivery of large complicated engineering projects (EPC) Global Water Intelligence, 2011 Company of the Year Award 2

3 Industrial & Waste Water Brine Concentration Sea & brackish water desalination brine is sent back to its origin and does not need special treatment - at least not until the regulations change Industrial & waste water brine cannot be treated similarly and must be removed to a special disposal area In this presentation I will focus on industrial & waste brine concentration 3

4 CSG\CBM Water Treatment Challenges Gas exploration and production generates large quantities of produced water Water is raised to the surface and must be treated Water treatment solutions are applied to reduce environmental impact Main Treatment Challenges High salinity reject streams Large water capacity Presence of Silica Very high bicarbonate concentration Remote location Treatment process generates high concentration reject streams 4

5 End to End Zero Liquid Discharge Water Treatment Process Flow Produced Water 0.8%TDS RO 3-9%TDS Permeate Softening [Ion Exchange] Silica Removal OPTIONAL Evaporators Crystallizer 20%-25% TDS 60%TDS Distillate Pure (Commercial) Salts Waste For Disposal Treated Water for Reuse 5

6 The Key Water Chemistry Challenges Analytical Value ph Value Total Dissolved Solids Suspended Solids (SS) Carbonate Alkalinity as CaCO3 Bicarbonate Alkalinity as CaCO3 Total Alkalinity as CaCO3 Chloride Fluoride Sulphate Silicon Calcium Magnesium Sodium Barium Strontium Reactive Silica Units ph Unit Produced Water 8.5 3, ,600 2, CF10 RO Reject , ,800 13,700 17,500 3, , CF6 Evaporator Reject , ,600 95, ,500 25, , CF = Concentration Factor 6

7 Electricity Driven Horizontal Falling Film Evaporator Mechanical Vapor Compression (MVC) 7

8 Pressure MVC Thermodynamics of Evaporation Process Water phase diagram P-T Water Phase Diagram Liquid Tube Side, Effect 1 Shell Side, Effect 1 Tube Side, Effect 2 Saturation line Vapor Shell Side, Effect 2 80 C 95 C Temperature Compressor Suction 8

9 Key Components: Horizontal Falling Film Evaporator Wetting System Heat Transfer Tubes 1 st Pass Heat Transfer Tubes 2 nd Pass Vapor Channel 9 Evaporator Vessel

10 Water Spraying System Spraying Header Spraying Nozzles Redundant nozzle design 10

11 Horizontal MVC Tube Arrangement Water Flow Square pitch arrangement; Enhanced Vapor Passage 11 High wetting rate > 550 L/m/hr

12 Condensation and Evaporation Heat Transfer Tube Water Film Feed water absorbs heat Evaporates Water vapor loses heat Condenses T out T in Water Film Feed water absorbs heat Evaporates T out

13 Thermal Distillation Process One Effect (Stage) Vapor To Next Effect / Comp. 1 st Pass Demister Feed Water NCG Venting Demister 2 nd Pass Vapor From Previous Effect Brine Distilled Water

14 Rounded Vessel Evaporator Front View More than 11,000 tubes are arranged in a square pitch pattern Water Vapor Brine Vapor is drawn from the shell side into the vapor channel, due to lower pressure 14

15 Sarlux Refinery: Sardinia, Italy 6 x MVC 17,280 m 3 /day All the equipment (piping; valves; pumps) is skid mounted below the vessels 15

16 Steam Driven Horizontal Falling Film Evaporator: Multi Effect Distillation (MED) Steam driven technology (waste heat can be used) No. of Effects: 3-15 Cost effective solution for large scale water treatment needs 16

17 MED Vapor Cascade: From Hot to Cold Effect ΔT=3 C Condensation 55 C Evaporation 53 C ΔT=3 C Condensation 58 C Evaporation 56 C EFF6 ΔT=3 C Condensation 61 C Evaporation 59 C EFF5 ΔT=3 C Condensation 64 C Evaporation 62 C EFF4 ΔT=3 C Condensation 67 C Evaporation 65 C EFF3 Condensation 70 C Evaporation 68 C EFF2 EFF1

18 MVC & MED Technical Comparison Parameter Specific Power Consumption Specific Steam Consumption Recovery Capacity Evaporation Stages (Effects) Operation Temperature Cooling Water Material of Construction Erection Operation & Maintenance IDE s Horizontal MVC 8-12 KWhr/m 3 (distilled) Not Required Up to 30% TDS 100-5,000 m 3 /day Up to C Not Required IDE s Horizontal MED KWhr/m 3 (distilled) ton steam/m 3 (distilled) Up to 30% TDS ,000 m 3 /day C Required High grade: 316L, Duplex, Super Duplex, Titanium Fully assembled upon delivery to site For large scale units, site erection is required Safe & fully automated process Low maintenance and easy access from ground level 18

19 Cawse Nickel Western Australia: MVC-1,800 m 3 /day Artesian Water Concentrator Client & Site Cawse Nickel Western Australia In operation since 1998 Converting artesian water for boiler feed 1 x MVC - 1,800 m 3 /day Technical Data: MVC Recovery: 40%-50% TDS Brine Salinity: 10%-17% TDS Degasification Silica Removal Thermal Evaporation Operation ph: Bicarbonate 1,000 ppm Silica 50 ppm 19

20 Wintershall, Germany: 1,200 m 3 /day; Oil Field Produced Water Treatment Client & Site Wintershall, Germany In operation since 1992 Enhanced Heavy Oil Production 2 x MVC m 3 /day (3,600 bbl/day) Oil Extraction effluent water reuse Technical Data: MVC Recovery: 50% TDS Oil Removal Thermal Evaporation Brine Salinity: 13% TDS ph: Top Brine Temperature: 70 C Silica 60 ppm 20

21 Tianjin, China: 200,000 m 3 /day Client & Site SDIC Power Plant, Tianjin China In operation since x 2,000MW power plants 8 x MED-25,000 m 3 /day (Distillate) ZLD Sea Salt production Technical Data: MED Recovery: 50% Pretreatment Thermal Evaporator Salt Production Brine Salinity: 6.6% ph: 8.1 Top Brine Temperature: 70 C 21

22 20 Years of Service in Australia ABOUT IDE TECHNOLOGIES 22

23 Cape Preston, Western Australia 140,000 m 3 /day RO Facility for Iron Mine

24 Thank You! Visit us at: Contact us: 24