a clean water inlet of the dissolution reactor 10 is connected with the clean water main pipe through a pipeline; a concentrated sulfuric acid inlet of the dissolution reactor 10 is connected with a concentrated sulfuric acid main pipe through a pipeline; a gas outlet of the dissolution reactor 10 is connected with the tail gas treatment system; and a primary electrolyte outlet of the dissolution reactor 10 is connected with a primary electrolyte inlet of the activation device 11 through a pipeline.

The present invention further provides a method for preparing a vanadium battery high-purity electrolyte based on the above system, which comprises the following steps:

allowing vanadium oxytrichloride liquid in the vanadium oxytrichloride storage tank 1 to enter the liquid phase hydrolysis reaction tank 2-1 through a pipeline, and then be subjected to hydrolysis precipitation together with clean water from the clean water main pipe to form a mixed slurry of vanadium pentoxide precipitate and hydrochloric acid solution; transmitting the produced acid gas to the tail gas treatment system through a pipeline; allowing the slurry to enter the washing filter 2-2 and be subjected to washing with clean water and filtration to obtain washing liquid and vanadium pentoxide precipitate powder; transmitting the washing liquid to the wastewater treatment system; and transmitting the vanadium pentoxide precipitate to the vanadium pentoxide hopper 3-1;