Wind-induced heating anti-freeze blockage device for molten salt heat absorber

Abstract

The invention relates to a device for preventing frozen blockage of a molten salt heat absorber through wind-induced heat. The device comprises a fan (1), a transmission box (2), a molten salt tank (3), impellers (4), a molten salt pump (5), electric valves (6a-6e), a molten salt pipeline (8), a liquid level sensor (11), temperature sensors (12a-12b) and a controller (13), wherein the fan (1) is connected with the transmission box (2); the transmission box (2) is connected with the impellers (4); the impellers (4) and the molten salt pump (5) are mounted in the molten salt tank (3); the electric valves (6a-6d) are mounted on the molten salt pipeline (8), and are located among the molten salt heat absorber (7), the molten salt tank (3) and downstream equipment; the electric valve (6e) is mounted on the molten salt pipeline (8) between an ascending pipe and an inlet (10); the liquid level sensor (11) and the temperature sensor (12a) are mounted on the molten salt tank (3); the temperature sensor (12b) is mounted on the molten salt heat absorber (7); the controller (13) is used for controlling the operation of the device.

Description

technical field [0001] The invention relates to an anti-freezing and blocking device for a molten salt heat absorber of solar thermal power generation, in particular to an anti-freezing and blocking device for a molten salt heat absorbing device caused by wind. Background technique [0002] Molten salt has been widely used in solar thermal power generation technology as a heat transfer and heat storage medium. It is precisely because of its low cost and the integrated characteristics of heat absorption and heat storage that the molten salt tower thermal power generation technology has become the most commercially promising renewable energy power generation method that can realize base load. However, the freezing point temperature of molten salt is high. The freezing point temperature of conventional ternary molten salt is 140°C, and the freezing point temperature of commonly used binary molten salt (60% NaNO3, 40% KNO3 mixture) is about 210°C. Therefore, molten salt pipeline...

AI Technical Summary

Problems solved by technology

This invention makes full use of the overflowing solar energy, but in order to ensure sufficient solar energy supply, a larger photovoltaic panel area and larger battery capacity are required, thereby increasing the system cost

[0005] In short, the problem of thermal insulation, preheating and anti-freeze blockage of molten salt heat sinks, especially the tube-sheet type molten salt heat sinks with the highest commercialization degree at present, has not been well solved.

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