A solar heat storage steam generator

Abstract

The invention discloses a solar heat storage steam generator. A shell of the steam generator is composed of an upper end cover, a drum and a lower end cover. A water inlet is formed in the drum. A steam outlet is formed in the upper end cover. Molten salt heat exchange pipes are arranged in the lower middle of the steam generator. Inlet and outlet openings of the molten salt heat exchange pipes are connected with an inlet and outlet opening of a solar paraboloid groove type molten salt heat collector. A middle phase change latent heat material packaging layer is arranged in the position, corresponding to the upper surfaces of the molten salt heat exchange pipes, in the middle of the steam generator, and a bottom phase change latent heat material packaging layer is arranged in the position, corresponding to the lower surfaces of the molten salt heat exchange pipes, at the bottom of the steam generator. The middle phase change latent heat material packaging layer is composed of an upper sealing plate, a lower sealing plate, heat exchange pipes and middle phase change latent heat materials, wherein the upper sealing plate and the lower sealing plate are provided with through holes; the heat exchange pipes are welded between the corresponding through holes of the two sealing plates, and the space defined by the upper sealing plate, the lower sealing plate, the heat exchange pipelines and the drum is filled with the middle phase change latent heat materials. According to the solar heat storage steam generator, molten salt is used for replacing heat conduction oil to transfer heat, so that cost is reduced; and in addition, the characteristic that the temperature is unchanged in the phase change process is utilized so that the temperature of generated steam is stable, the influences of solar radiation are reduced, and automatic control over a branch circuit of a system is relieved.

Description

technical field [0001] The present invention relates to a steam generator, in particular to a solar heat storage steam generator, in particular to a steam generator which uses sensible heat and latent heat mixed heat storage to store solar energy to generate steam in the application field of medium and high temperature solar heat. Background technique [0002] Heat storage technology is the key to high-temperature heat utilization in solar energy, which can make steam generators generate continuous steam and overcome the discontinuity and instability of solar energy use. Heat storage technology is divided into sensible heat storage and latent heat storage. [0003] Among the known technologies, the Chinese patent application with patent application number 201110049637.6 discloses a heat storage and evaporation integrated device for solar thermal power generation, and the Chinese patent application with patent application number 201110096656.4 discloses a high-temperature con...

AI Technical Summary

Problems solved by technology

At present, the use of explicit heat storage, such as heat transfer oil, molten salt, etc., has the disadvantages of low heat storage density, small thermal conductivity, unsatisfactory heat transfer effect and high cost.

In the heat transfer oil parabolic trough solar system, the heat storage equipment and the steam generator are separated. Such a system requires more complicated pipelines and more equipment, so the cost is high and the heat loss is large.

Images