Molten-salt single-tank electric heating heat storage heating system and using method

Abstract

The invention discloses a molten-salt single-tank electric heating heat storage heating system and a using method. The molten-salt single-tank electric heating heat storage heating system comprises amolten salt heat storage tank; a high-temperature molten salt inlet is formed in the upper portion of the molten salt heat storage tank, and a low-temperature molten salt inlet is formed in the lowerportion of the molten salt heat storage tank; a low-temperature molten salt pump and a high-temperature molten salt pump are arranged on the molten salt heat storage tank; an outlet of the low-temperature molten salt pump is connected with a molten salt inlet of a molten salt electric heater, an outlet of the molten salt electric heater is connected with the low-temperature molten salt inlet and amolten salt side inlet of a heat exchanger, and the molten salt electric heater is connected with a power supply; an outlet of the high-temperature molten salt pump is connected with the molten saltside inlet of the heat exchanger, a molten salt side outlet of the heat exchanger is connected with the low-temperature molten salt inlet, and the water side of the heat exchanger is connected with aheat consumer. According to the molten-salt single-tank electric heating heat storage heating system and the using method, molten salt is adopted as a heat storage and heat release medium and is poisonless, harmless, cheap and easy to obtain; heat storage is conducted through off-peak electricity and waste electricity not using wind and light, therefore, the peak and off-peak difference of a powergrid can be significantly decreased, the actual running efficiency of a coal-fired power unit is improved, the power transmission capability of the power grid is enhanced, and the renewable energy source utilization efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of molten salt heating, in particular to a method of using molten salt as a heat storage medium, using low-valley electricity or "garbage electricity" that abandons wind and light to heat molten salt to realize building heating, hot water supply or provide industrial heating. The steam molten salt single-tank electric heating heat storage heating system and its application method. Background technique [0002] In recent years, the smog problem has attracted unprecedented attention, and a large amount of coal for heating in winter is one of the main reasons for the serious smog. To this end, the state has issued a series of coal-to-electricity policies, and the municipal and district finances have also issued corresponding subsidy policies to encourage the society to use electric heating instead of coal-fired heating to alleviate the current smog situation. However, if the electric heating device is used dir...

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Problems solved by technology

[0003] At present, the double-tank molten salt low-valley electric heating centralized heating system is widely used in the market, which requires each tank to be able to store all the heat storage medium in the system, resulting in a part of the tank space not being used

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