A kind of molten salt heat exchange experimental device and its control method

Abstract

The present invention disclosed a molten salt heat exchange experimental device and its control method. The experimental device includes high -temperature melting salt cycle circuit, thermal oil circulation circuit, cooling water circulation circuit and control system.Connecting the melting salt heat exchanges experimental section, the heating oil circulation circuit and the cooling water cycle circuit are connected to the thermal oil / cooling water heat exchange device;And it is easy to achieve.The present invention reduces the amount of engineering in the experimental section. At the same time, the experimental section is performed at the same time through intelligent control, which largely reduces energy consumption, and can achieve precise control of temperature and flow.It has contributed huge energy conservation.Experimental operators are far away from the experimental desk area, fully realize intelligent automation, and improve the safety of experiments.

Description

technical field [0001] The invention belongs to the technical field of molten salt heat exchange, and relates to a molten salt heat exchange experimental device and a control method thereof. Background technique [0002] As we all know, molten salt has the characteristics of wide temperature range, high thermal stability, low vapor pressure, large heat capacity, strong ability to dissolve substances, low viscosity and relatively cheap price. Therefore, molten salt has broad application prospects as a heat transfer and heat storage fluid, such as in metallurgy, chemistry, nuclear power, and solar energy. Moreover, molten salt solar power plants have been used in commercial power generation around the world. Therefore, the large-scale molten salt heat exchange test bench has an important guiding role in the application of molten salt [0003] At present, there are many conventional molten salt heat exchange test benches, all of which are small-scale experimental benches with ...

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Problems solved by technology

[0005] 2) Flow control. For a large-scale molten salt heat exchange experiment platform, the flow rate changes in a large range. It is difficult to precisely adjust the flow rate only by adjusting the frequency of the pump, and only by adjusting the flow rate through the electric valve may cause internal leakage in the pipeline. If the pressure fluctuates too much, it will cause leakage and damage to the experimental pipeline or equipment, increasing the risk of the experiment

[0006] 3) Replacing the experimental section. For a large-scale molten salt heat exchange experimental platform, it is necessary to replace the experimental section. At the same time, the project is huge, and every time the experimental section is replaced, the experiment has to start from the beginning, and the energy consumption is also very large.

[0007] 4) Energy consumption. For a large-scale molten salt heat exchange experimental platform, heating, working medium circulation and cooling are all very energy-consuming

[0008] 5) Safety issues. Molten salt itself has a very high melting point, and the temperature of the heat exchange experiment between molten salt and heat transfer oil is even higher. At the same time, heat transfer between heat transfer oil and molten salt at high temperature is also easy to coke and produce solid impurities, thus blocking the experimental pipeline , and for the large-scale molten salt heat exchange experimental platform, this risk is even greater

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