Seawater bromine extraction device and method for producing bromine by photoelectrocatalytic oxidation coupling resin adsorption method

The invention relates to a seawater bromine extraction device and method for producing bromine through a photoelectrocatalytic oxidation coupling resin adsorption method. Seawater with insoluble particles removed through filtering pretreatment enters a photoelectrocatalytic oxidation zone, acid is added to adjust the pH value to be 4-5, then catalytic oxidation reaction is carried out on a graphite plate cathode and a tungsten carbide/cadmium sulfide photocatalyst loaded platinum-based anode under the combined action of a visible light source, and bromide ions are changed into free bromine; then the seawater rich in free bromine enters a resin adsorption column filled with D201 macroporous resin to be adsorbed, then water vapor is introduced into bromine-loaded resin to directly evaporate out the free bromine, and the evaporated liquid is subjected to condensation, separation and refining processes to obtain bromine. The invention also provides a preparation method of the tungsten carbide/cadmium sulfide phot