Middle-deep geothermal energy heat exchange device

The invention belongs to the technical field of geothermal energy heat exchange devices, and particularly relates to a medium-deep layer geothermal energy heat exchange device which comprises a sleeve assembly, a heat exchange starting assembly, a heat exchange purification assembly, a heat exchange recovery assembly and an impurity separation assembly. The sleeve assembly comprises an outer pipe and an input sleeve, the top end of the outer pipe is fixedly connected with a limiting pad, an inner pipe is embedded in the center of the surface of the limiting pad, a first input pipe and a second input pipe are further embedded in the surface of the limiting pad, the input sleeve is connected to the inner pipe in a sleeving mode, and two sets of input holes are further formed in the top end of the input sleeve. Through the effect that a sealing pipe is used for being communicated with a heat exchange starting assembly, a heat exchange medium of the heat exchange starting assembly sequentially passes through the