Device for removing sulfate ions in ionic liquid by freezing crystallization method

The utility model discloses a device for removing sulfate ions in ionic liquid by a freezing crystallization method. The device comprises an ice maker unit and a slurry tank, wherein the ice maker unit is connected with the slurry tank through a liquid conveying pipe, the slurry tank is connected with the filter press through a liquid conveying pipe, the ice maker unit is connected with the cationdesalting device through a liquid conveying pipe, the cation desalting device is connected with the centrifugal pump through a liquid conveying pipe, and a slurry stirrer is arranged at the top of the slurry tank. According to the utility model, a cooling system of the ice maker unit is completely utilized to achieve a cooling effect; a cooling coil cooling mode in the slurry tank is cancelled; reducing investment, sO4 < 2-> in the ionic liquid is removed through freezing crystallization; the ionic liquid desulfurization system can be matched with an ion exchange desalination method, so thatSO4 < 2-> in the ionic liq