The invention relates to a solar thermal power
system. The
system, which is integrated with particulate heat absorption, heat storage and direct
contact heat exchange, comprises a particulate heat absorption unit, a particulate heat storage unit, a direct
contact type superheated steam generation unit and a
steam power unit. In the operation process of the
system, heat storage particles first absorb solar
radiation heat energy in the particulate heat absorption unit to become high-temperature heat storage particles, the high-temperature heat storage particles are stored in the particulate heat absorption unit under
atmospheric pressure, the high-temperature heat storage particles drop under gravity into the high-pressure direct
contact type superheated steam generation unit to generate high-pressure
superheated steam, and the superheated steam is inputted into the
steam power unit after passing through a
buffer tank and a pressure regulation valve. The solar thermal power system can store
heat energy in a
large capacity under
atmospheric pressure and directly generate high-pressure superheated steam for outputting power to the outside, has the characteristics of simple structure, high stored heat temperature, low cost and the like, and is particularly suitable for the development of high-power, high-efficiency, high-temperature and low-cost new-generation solar thermal power generation systems.