Apparatus and method for heating molten salt

Abstract

The invention relates to an apparatus and method for heating molten salt. The device comprises a salt liquid tank; at least one group of molten salt electrodes, wherein each group of molten salt electrodes comprising a plurality of molten salt electrode boxes, and the plurality of molten salt electrode boxes being arranged at a positions higher than the salt liquid box; at least one group of inletelectrode insulating pipelines; at least one group of outlet electrode insulating pipelines; at least one connecting pipeline; at least one molten salt circulating pump arranged in the connecting pipeline; and a power supply device comprising multi-phase alternating current. The phase number of the multi-phase alternating current is the same as the number of the molten salt electrode boxes, and each phase of the multi-phase alternating current of the power supply device is electrically connected to one corresponding molten salt electrode box in the plurality of molten salt electrode boxes.

Description

technical field [0001] The invention relates to the field of molten salt heating, in particular to a device and method 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 directl...

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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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