The most complete solutions in GRP PIPES AND FITTINGS SANTA MARIA DE GUIA EXPANSION OF SEAWATER DESALINATION PLANT

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1 The most complete solutions in GRP PIPES AND FITTINGS SANTA MARIA DE GUIA EXPANSION OF SEAWATER DESALINATION PLANT ACCIONA INFRAESTRUCTURAS - ACCIONA AGUA Santa María de Guía (Gran Canaria) 2008 / D-4 C A S E S T O R Y SWDP

2 desalination PROTESA SUPPLIES AND INSTALLS THE G.R.P. PIPE FOR PROCESS WATER IN THE SWDP SANTA MARIA DE GUIA Job: Pipe erection in the Seawater Desalination Plant Owner: Guia U.T.E. (Acciona Infrastructures and Acciona Water). Site: Santa María de Guía (Las Palmas de Gran Ganaria) Capacity: m 3/day. Scope of supply: 1.- Seawater discharge and pumping. 2.- Front of sand filters. (feeding, washing, blowing, emptying) 3.- Chemical cleaning circuit. (outlet, return) Circuit of displacement water and supply washing water tanks. 4.- Brine discharge and energy recovery. 5.- Product water circuit. The Expansion of the reverse osmosis plant of Santa Maria de Guia (Las Palmas de Gran Canaria) has been promoted by the Gran Canaria Water Insular Council, executed by the U.T.E. formed by Acciona Infrastructures and Acciona Water and the technical assistance to the construction management which has been performed by Applus Norcontrol. The new reverse osmosis plant has a net production line of m 3/day, operating in a continuous manner (24 hours/day), obtaining an hourly flow of 208,3 m 3. With the commissioning of this plant, the drinking water shortage will be improved in the area. For the execution of the plant, the existing civil work has been used which belonged to the old compression steam desalination, leaving sufficient space to house possible future extensions of production capacity.

3 SANTA MARIA DE GUIA SEAWATER DESALINATION PLANT C A S E S T O R Y SWDP DESIGN AND FABRICATION OF PIPE AND FITTINGS FOR THE JOB: Glass fiber and thermosetting resin pipe, fabricated by the Filament Crossed Winding, according to AWWA C950, AWWA M45, UNE 53323EX and NBS PS On the basis of the system requisitions insofar as mechanical loads is concerned, the nature of the fluid to be directed and its additives, as well as the service conditions (pressure, diameter and temperature), our Engineering Department configures each one of the pipes in an individualized manner. For the fabrication of glass fiber and thermosetting resin pipes of Nominal Diameter smaller than ND200, the manual procedure is used, Hand Lay Up, which is governed by the code of the National Bureau of Standards of USA, in its Voluntary Product Standard PS The fabrication of piping of ND200 and larger is executed by using the Crossed Filament Winding system consisting in the winding of continuous glass fiber filaments on a mold, which has been previously provided with a corrosion-proof barrier (this process is continuous and automatic). The different layers, which make up the GRP pipes and fittings, are the following: Inside corrosion-proof layer, obtained manually: - Smooth surface of mm rich in resin reinforced with surface glass mat Type "C". - One layer making up approximately 1 mm thickness obtained on the basis of glass fibers which are not continuous (mats of 450 gr/m²), saturated likewise with resin. Mechanical reinforcement layer, by automatic procedure: - Structural part on the basis of variable winding (from 50º to 70º) of continuous filament 2,400 tex with resin. Outside corrosion-proof layer, obtained manually: - Surface rich in non paraffin resin, reinforced with glass fiber surface veil "C". The construction of standardized fittings is made up under the Regulations given by the National Bureau de Standards of USA, in its Voluntary Product Standard PS 15-69, titled Custom Contact Molded Reinforced Polyester Chemical Resistant Process Equipment, equivalent to Code SPI 122/C, readapting the safety factor to 6, as common standard in this type of installations. This gives as a result the fabrication of a high quality Alphacor pipe with excellent mechanical properties, thanks to the orientation of the fibers of the structural layer, as well as the chemical layers by the election of the resin which makes up the corrosion-proof barriers.

4 desalination JOB DESCRIPTION Discharge and pumping seawater For the seawater intake and pumping system, the existing ones of the old desalination have been used, adapting the boreholes to the new characteristics of the plant. Front of sand filters (feeding, washing, blowers, emptying) The chlorinated and flocculated seawater is filtered in three horizontal filters of 2500 mm diameter and a cylindrical length of 10,000 mm, the surface of unit filtration being of m 2. Fig. 1, 2 and 3. - Inlet connection of Sand Filters (ND-500). The downspout of ND-500 at 45º connects with the header of washing water collecting (ND-500). The top pipe is the seawater discharge header (ND-400). In the sequence of images, the 2 painting layers applied are observed with a double aim.

5 SANTA MARIA DE GUIA SEAWATER DESALINATION PLANT C A S E S T O R Y SWDP In the first place, the conduction receives an application of a black color base layer which confers to it the sufficient opacity to cut away the effect of the photosynthesis and avoid in this way, the biologic development inside. A second layer serves of identification to each one of the lines installed according to the color code designated by the project. Chemical cleaning circuit. (outlet, return) The chemical cleaning is the operation performed to eliminate accumulations of dirt in the membranes and it occurs in relatively long service periods. The process consists in recycling the cleaning solution at a high speed through all the membranes. Discplacement water circuit and provision for washing water tanks The displacement circuit responds to the need of clarifying the high saline concentrations existing in the membranes and pumps when the plant is placed out of service for an appreciable long period of time. The fresh water required for this function will be the water product generated in the installation, so that the chemical products tank be filled with product water.

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7 SANTA MARÍA DE GUÍA SEAWATER DESALINATION PLANT C A S E S T O R Y SWDP Fig. 4, 5, 6 and 7.- Pipe (ND-200) of Discharge connection to the washing Tank (grey color). Headers and lines of Suction, Discharge and Recirculation of Washing Water of the Filter Building (ND 200 and ND 250). Brine discharge and energy recovering elements The system of Kinetic energy savings allows treating a wealth of m 3/h. This system is based on the property of the liquids to be incompressible, which allows subjecting a mass of water to a certain pressure without energy expense. In order to carry out this principle, isobaric chambers are used. Product water circuit (post-treatment) This circuit sends the desalinated water to a tank for the demineralization of water through calcite and finally the water product is stored in a tank for its later pumping. In PROTESA, we understand that our experience, after having executed practically all of the desalination stations, is fundamental to achieve the final success of these complex and genuine projects.

8 SANTA MARIA DE GUIA SEAWATER DESALINATION PLANT P R O T E C C I O N E S P L Á S T I C A S, S. A. Xavier Cortés Ruíz Project Manager Industrial Plants Division c/industria, 3-5 Pol. Industrial Anoia SANT ESTEVE SESROVIRES Barcelona - España Tel. (+34) Fax (+34) protesa@protesa.es Producto certificado por BUREAU VERITAS Certification