Electrolyte waste heat utilization device for ionic membrane alkali production process

The utility model relates to an electrolyte waste heat utilization device for an ionic membrane alkali making process. The electrolyte waste heat utilization device comprises an electrolyte heat source input system and a power generation circulating system for power generation. A hot side inlet of an alkali liquor cooler of the electrolyte heat source input system is connected with an electrolyte pipeline electrolyzed by an ionic membrane alkali making process, a hot side outlet of the alkali liquor cooler is connected with a cooled electrolyte pipeline, and a cold side outlet of the alkali liquor cooler is connected with a hot side inlet of an evaporator through a pipeline and a second valve; a hot side outlet of the evaporator is connected with a hot side inlet of the preheater through a pipeline, a hot side outlet of the preheater is connected with a cold side inlet of the alkali liquor cooler through a pipeline, a circulating pump and a third valve, and the cold side inlet of the alkali liquor cooler is c