Double high temperature molten salt storing tank system of solar thermal power station

Abstract

The invention discloses a double high temperature molten salt storing tank system of a solar thermal power station. The system comprises a first molten salt storing tank, a second molten salt storing tank, a first molten salt storing tank communication pipeline, a second molten salt storing tank communication pipeline, a first control valve, a second control valve and a molten salt inlet, wherein the first molten slat storing tank communication pipeline is guided out from the first molten salt storing tank and communicates with a molten salt inlet; the second molten salt storing tank communication pipeline is guided out from the second molten salt storing tank and communicates with a molten salt inlet; the first control valve is arranged on the first molten salt storing tank communication pipeline; and the second control valve is arranged on the second molten salt storing tank communication pipeline. The system further comprises a molten salt pumping-out device for pumping out high-temperature molten salt; and the molten salt pumping-out device is correspondingly connected to the first molten salt storing tank and the second molten salt storing tank. In case of leaking of one molten salt storing tank, the leaked molten salt storing tank can be emptied for overhauling, and another high-temperature molten salt storing tank can be started at the same time for normally generating power. According to the system, the two high-temperature molten salt storing tanks are treated as mutual backup of each other, so that the power generation stability and safety of the solar thermal power station can be ensured.

Description

technical field [0001] The invention relates to the field of solar thermal power generation, in particular to a high temperature molten salt storage tank system of a solar thermal power station. Background technique [0002] Solar high-temperature thermal power generation technology is an important direction for large-scale utilization of solar energy. The working medium used in solar high-temperature thermal power generation includes water (water vapor), molten salt, air, heat transfer oil, liquid metal and other heat transfer media. Among them, due to the fluctuation and discontinuity of sunlight, the solar thermal power generation system must have a large-scale heat storage system in order to continuously and stably generate electricity. Molten salt has the characteristics of high operating temperature, wide temperature range, good flow characteristics, and large heat capacity. As a heat storage medium, it can be used in heat storage systems to make up for the problem of...

AI Technical Summary

Problems solved by technology

[0004] Traditional storage tanks use single-layer tanks, and the storage tanks used in photothermal power plants are often huge in size, with frequent temperature changes, and the loads on the storage tanks are complex and unstable. Therefore, the storage tanks have a great possibility of failure, resulting in molten salt spill

The existing Crescent Dunes in the United States and the Gemasolar solar thermal power station in Spain are both due to leakage of the storage tank, which caused the power station to shut down for a long time and caused serious economic losses

At the same time, due to the huge volume of the storage tank, the molten salt pumps used are often long-axis vertical pumps with high temperature resistance. The cost of such molten salt pumps is often high and maintenance is inconvenient.

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