Front-end system for separating and recycling blast furnace gas desorption gas

The utility model discloses a front-end system for separating and recycling blast furnace gas desorption gas, relates to the technical field of recycling of the blast furnace gas desorption gas, and aims to solve the problem that the existing device cannot meet the separation requirement of the blast furnace gas desorption gas. The device comprises a lithium bromide refrigerator, a heat exchanger and a rotational flow dehydrator, a to-be-cooled gas inlet of the lithium bromide refrigerator is connected with a blast furnace gas analysis gas pipe, a cooling water inlet is connected with a cooling water pipe, a cooled gas outlet is connected with a to-be-cooled gas inlet of the heat exchanger, a chilled water outlet of the lithium bromide refrigerator is connected to a cooling water inlet of the heat exchanger, and the heat exchanger is further provided with a cooling water outlet and a cooled medium outlet. Wherein the cooled medium outlet is connected to the feeding end of the cyclone dehydrator; the device is