Anode protective device of aluminium sulfate evaporation plant

The utility model discloses an anode protection device for an aluminium sulfate evaporator, which is composed of a heating pipe as an anode, a potentiostat, an auxiliary cathode, a controlling reference electrode and a monitoring reference electrode. An anode wiring terminal, a cathode wiring terminal, a controlling reference wiring terminal and a monitoring reference wiring terminal which are arranged on the potentiostat are respectively connected with the heating pipe, the auxiliary cathode, the controlling reference electrode and the monitoring reference electrode; the heating pipe which is a helical outer pipe and the auxiliary cathode which is a helical inner pipe are respectively inserted into an evaporation boiler, which reduces the expense cost, prolongs the service life of the heating pipe and increases the yield of the concentrated sulfate solution.