Renewable devulcanizing technological process and use thereof

The invention discloses a renewable desulfurization process method and a use thereof. The process flow comprises water washing and cooling of desulfurized flue gas, absorption and desorption of SO2 and heat supply of the desorption process. The process flow is characterized in that at least part of the heat energy required by the desorption process is provided by physical sensible heat of mixed gas discharged by a desorber and latent heat of vaporization of water vapor in the mixed gas, and is used for solving the problems of high energy and water consumption in the desulphurization process. The invention also comprises a use of the renewable desulphurization process flow, for example, the process flow can be used in flue gas desulfurization in a sintering system of a steel plant, the flue gas desulfurization of iron-making blast furnace gas, etc. The process method and the use have the main advantages of energy and water saving, and reducing heat pollution to environment at the same time.