Single-tank fused salt heat storage type electric boiler capable of exchanging heat with heat tube as well as heat exchange method

Abstract

The invention discloses a single-tank fused salt heat storage type electric boiler capable of exchanging heat with a heat tube as well as a heat exchange method. The single-tank fused salt heat storage type electric boiler comprises a fused salt heat storage tank, an electric heater and a heat exchanger, wherein the electric heater and the heat exchanger are mounted on the top of the fused salt heat storage tank in a flange connecting mode; a stirrer is further mounted on the center position of the top of the fused salt heat storage tank; the electric heater and the heat exchanger are separately arranged at the two sides of the stirrer; and the fused salt heat storage tank and the heat exchanger are separated by a partition. According to the single-tank fused salt heat storage type electric boiler capable of exchanging heat with the heat tube, flow of heat exchange fluid and outlet temperature are stable by regulating rotation speed of a three-way mixing valve or a stirrer, and a control method is simple and reliable; a valley-electricity heating technology and a single-tank fused salt heat storage technology are adopted, a fused salt pump and a fused salt pipeline are cancelled, and the heat tube exchanger and the electric heater are internally arranged, so that a fused salt heat storage system is greatly simplified, and flow of the heat exchange fluid and the outlet temperature are stable; and the single-tank fused salt heat storage type electric boiler has the remarkable advantages of a compact structure, low cost, fused salt freezing-blocking resistance and the like, can replace various coal-fired boilers which output hot water, hot oil and steam, and relieves the increasingly serious environmental pollution problem.

Description

technical field [0001] The invention belongs to the technical field of heat-storage electric boilers, in particular to a single-tank molten salt heat-storage electric boiler for heat exchange by heat pipes and a heat exchange method. Background technique [0002] Faced with the increasingly severe smog problem, the state began to ban various small and medium-sized coal-fired boilers, and encouraged replacement by electric boilers. Because of its ability to cut peaks and fill valleys, regenerative electric boilers have been vigorously promoted by the power sector and enjoy preferential electricity price policies. Regenerative electric boilers use cheap valley electricity to provide thermal energy for the production of enterprises, which can greatly reduce the daily electricity expenses of enterprises compared with traditional electric boilers. [0003] As a thermal storage medium with good heat transfer performance, high operating temperature, large thermal storage capacity ...

AI Technical Summary

Problems solved by technology

This technical solution is costly and requires precise flow control of molten salt pumps, as well as good anti-freezing measures for molten salt heat exchangers and pipelines

These problems limit the development of molten salt heat storage electric boiler and its application in the field of medium and low temperature heating (industrial heating and central heating, etc.)

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