METHOD FOR IN SITU COATING A TOWER SOLAR RECEIVER

• Main Authors: FERNANDEZ QUERO, VALERIO, MARTINEZ SANZ, NOELIA, CLAVIJO RIVERA, ERIKA PATRICIA, BARRAGAN JIMENEZ, JOSE
• Format: Patent
• Language: English; Spanish
• Published: 07.08.2012
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; RANGES; SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS; SPRAYING OR ATOMISING IN GENERAL; TRANSPORTING; VENTILATING; WEAPONS

The invention relates to a method for in situ coating a tower solar receiver in order to protect the surface of the receiver from corrosion and to increase absorptivity of same, which is carried out in several steps: surface preparation, application of the coating, curing, optional vitrification, and controlled cooling. The surface preparation is done by zones depending on the size of the receiver, a methodology that enables an intercalated application of the coating in order to minimize the risk of corrosion. The curing stage is carried out by supplying steam to the inside of the receiver tubes, and temperature requirements above the operating limits of the boiler are adjusted with the solar field as support system. Vitrification is done using saturated steam traveling through the receiver tubes and concentrating solar radiation on the surface of the receiver from the solar field. Método de recubrimiento in situ de receptor solar de torre, para la protección de la superficie del receptor contra la corrosión y para el incremento de la absortividad de la misma que se ejecuta en varias etapas: preparación superficial, aplicación del recubrimiento, curado, opcionalmente vitrificado y enfriamiento controlado. La preparación superficial se hace por zonas dependiendo de las dimensiones del receptor, metodología que permite ejecutar la aplicación del recubrimiento intercalada para minimizar el riesgo de corrosión. La etapa de curado se realiza suministrando vapor al interior de los tubos del receptor y los requerimientos de temperatura superiores a los límites operativos de la caldera, se ajustan con el campo solar como sistema de apoyo. El vitrificado se hace con vapor saturado que pasa a través de los tubos del receptor y concentrando radiación solar sobre la superficie del receptor proveniente del campo solar.