Device for heating and melting salt

Abstract

The present invention relates to a device for heating and melting salt. The device for heating and melting salt comprises: a first salt liquid tank; a second salt liquid tank disposed at a higher position than the first salt liquid tank; at least one group of salt melting electrodes, wherein each group of salt melting electrodes comprise a plurality of salt melting electrode boxes, the plurality of salt melting electrode boxes are disposed at a position higher than the first salt liquid tank and lower than the second salt liquid tank; at least one group of inlet electrode insulating pipelines,wherein the inlet electrode insulating pipelines are used for making the second salt liquid tank communicate with the salt melting electrodes by liquid; at least one group of outlet electrode insulating pipes, wherein the outlet electrode insulating pipelines are used for making the salt melting electrodes communicate with the first salt liquid tank by liquid; and a power unit, wherein the powerunit has a multi-phase alternating current, the phase number of the multi-phase alternating current is the same as the number of the salt melting electrode boxes, and each phase of the multi-phase alternating current of the power unit is electrically connected to one corresponding salt melting electrode box in the plurality of salt melting electrode boxes.

Description

technical field [0001] The invention relates to the field of molten salt heating, in particular to a device for heating molten salt using electrodes. Background technique [0002] Molten salt is an excellent heat transfer and heat storage medium with low vapor pressure, wide applicable temperature range, stable chemical properties, large heat capacity, non-combustible, cheap and easy to prepare, etc. The field of high temperature heat storage has broad application prospects. [0003] At present, electric heating of molten salt mostly uses electric heating rods to heat indirectly through heat conduction. The higher the working temperature of the heating wire, the shorter the service life, and the better the insulation between the heating wire and the outer casing, the worse the heat transfer is, so it is not conducive to It is used in high temperature and high power electric heating of molten salt. [0004] The electrode heating method is that the current directly passes th...

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Problems solved by technology

[0003] At present, electric heating of molten salt mostly uses electric heating rods to heat indirectly through heat conduction. The higher the working temperature of the heating wire, the shorter the service life, and the better the insulation between the heating wire and the outer casing, the worse the heat transfer is, so it is not conducive to Application in high temperature and high power electric heating of molten salt

[0004] The electrode heating method is that the current directly passes through the molten salt to generate heat. The molten salt itself is a heating element, and there is no problem caused by indirect heating. The current density on the surface is controlled within a reasonable range, and it is difficult to avoid corrosion of electrode materials and molten salt electrolysis

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