Single-tank immersion type heat exchange molten salt energy storage and heating device

Abstract

The invention discloses a single-tank immersion type heat exchange molten salt energy storage and heating device. The single-tank immersion type heat exchange molten salt energy storage and heating device comprises a molten salt heat storage tank, wherein a molten salt electric heater is installed at the bottom of the molten salt heat storage tank, a first heat exchanger is arranged in the moltensalt heat storage tank and is always immersed in molten salt medium, an inlet reserved flange of the first heat exchanger is connected with a heat-transfer oil circulating pump, and an outlet of the first heat exchanger is inserted into a heat-transfer oil heat exchange tank; and a second heat exchanger is arranged in the heat-transfer oil heat exchange tank, and the second heat exchanger is immersed in heat-transfer oil. The single-tank immersion type heat exchange molten salt energy storage and heating device has the advantages that irreversible loss caused by large temperature difference heat exchange is avoided, the manufacturing problem of a large temperature difference heat exchanger is solved, and a heat exchange system is more stable.

Description

technical field [0001] The invention relates to a heat supply device, in particular to a single-tank submerged heat exchange molten salt energy storage heat supply device, which belongs to the field of energy storage heat supply devices. Background technique [0002] Molten salt thermal energy storage is a new technology in my country, mainly derived from foreign solar thermal power generation technology. At present, several domestic companies use molten salt heat storage technology for domestic heating, and their technological process basically follows the foreign molten salt application method. The heating energy storage and heat exchange structure of molten salt are very complicated; high-temperature molten salt tanks, low-temperature melting Salt tank, molten salt pump circulation, pipeline insulation and heat tracing, molten salt / steam high temperature heat exchange, steam / water low temperature heat exchange, and then hot water can be provided to the heating pipeline. ...

AI Technical Summary

Problems solved by technology

The entire molten salt circulation system must be heat traced. Once the heat tracing system is stopped and the temperature of the pipeline valve is lower than the freezing point of the molten salt, the molten salt liquid will solidify, causing the entire circulation system to be scrapped and causing huge losses. At the same time, it is difficult to control the high temperature melting point. Salt liquid circulation has quite high requirements on equipment, pipelines and materials, and has disadvantages such as potential safety hazards

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