Device for heating molten salt

The utility model relates to a device for heating molten salt. The apparatus comprises: a first molten salt storage tank; a second molten salt storage tank; at least one group of molten salt electrodes, wherein each group of molten salt electrodes comprises a plurality of molten salt electrode boxes; at least one group of inlet electrode insulating pipelines; at least one group of outlet electrodeinsulating pipelines; at least one first connecting pipe; at least one second connecting pipe; the at least one first molten salt circulating pump is arranged in the corresponding first connecting pipeline and is used for pumping the molten salt in the first molten salt storage tank to the molten salt electrode box; and a power supply device. The utility model can successfully solve the technicalproblem of realizing low-current-density working of the electrode in various ion conductors under any voltage, and is not only suitable for fused salt electrode type heating, but also suitable for electrode type heating of ot