Efficient multi-concentration solution preparation device and process

An efficient multi-concentration solution preparation device is disclosed. The device comprises a solvent vaporizing chamber, a solution preparation tank and a solution storage tank, wherein the solvent vaporizing chamber, the solution preparation tank and the solution storage tank are sequentially connected; the solvent vaporizing chamber is connected with a solvent inlet pipeline; a refrigerant pipeline sequentially penetrates through the solution preparation tank and the solvent vaporizing chamber, is arranged in a spiral mode in the solvent vaporizing chamber and the solution preparation tank and used for absorbing heat generated in the solution preparation process and enabling the heat to be used for vaporizing a solvent; an industrial water sprayer is arranged at the upper end in the solution preparation tank; a gas inlet distributor is arranged at the lower end in the solution preparation tank, and the industrial water sprayer is connected with an industrial water inlet pipeline; a flow control valve i