Secondary reflector substructure device for tower type photo-thermal power generation

Abstract

The invention relates to a secondary reflector substructure device for tower-type photo-thermal power generation. The device comprises a substructure steel structure assembly (1), a secondary reflector assembly (2) and a spring tensioning and limiting connecting assembly (3), and the secondary reflector assembly (2) is provided with the substructure steel structure assembly (1). The secondary structure steel structure assembly (1) and the secondary reflector assembly (2) are connected through the spring tensioning and limiting connecting assembly (3). A secondary reflector can realize free mirror surface extension under a high-temperature working condition and high rigidity under a strong wind working condition. In addition, the processing, manufacturing, assembling and construction efficiencies are improved, the process difficulty is reduced, and the effects of improving the surface precision of a secondary reflector substructure and reducing the cost are achieved.

Description

【Technical field】 [0001] The invention relates to a tower-type photothermal power generation secondary reflection mirror substructure device, which belongs to the technical field of photothermal power generation. 【Background technique】 [0002] The concentrating system of the secondary reflection tower solar thermal power station is mainly composed of two parts: the heliostat field and the secondary reflection tower. The secondary reflector at the top of the tower converges into the heat absorber at the bottom of the tower. The secondary reflection technology can effectively reduce the heat loss of the tower top heat absorber, improve the photothermal efficiency, solve the problem of freezing and leakage of the molten salt pipeline, and improve the safety of the power station. Therefore, the secondary reflection technology has a good application prospect. [0003] The ideal surface type of the secondary reflection surface is a rotating hyperboloid, the point of the primary ...

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Problems solved by technology

[0007] 1. Under the condition of temperature load, the reflector will expand with heat and contract with cold. Due to the material difference (the reflector material is generally aluminum mirror, the thermal expansion coefficient is higher than steel) and the temperature gradient distribution between the reflector and the main structure, if the reflector With a fixed connection with the main structure, the thermal expansion of the reflector will be restricted, and it is easy to produce ripples or wrinkles, which will greatly affect the surface shape

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