Multipurpose efficient low-temperature evaporation, concentration and crystallization equipment

The invention relates to multipurpose high-efficiency low-temperature evaporation concentration crystallization equipment which comprises a spiral conveyor, an evaporator assembly, a spiral winch, a spiral scraper stirring rod and a stirrer assembly, the upper part of the evaporator assembly is provided with the stirrer assembly, and the lower part of the evaporator assembly is provided with a material confluence chamber; the inner cavity of the evaporator assembly, namely the space of the outer wall of the heat exchange pipe, is a refrigerant flowing channel, a cavity on the lower portion of the chain wheel box body is communicated with the material confluence chamber through the heat exchange pipe to form a liquid material flowing channel, and a spiral scraper stirring rod is arranged in each heat exchange pipe. The lower end of the stirring rod penetrates through a magnetic seat ring in the limiting disc assembly in a magnetic limiting mode, the position axis of each driven shaft and each driving shaft in