Low-energy-consumption tailing sand selecting and dry discharging system

The utility model relates to the technical field of tailing sand separation and dry discharge. The low-energy-consumption tailing sand selecting and dry discharging system comprises a sand selecting device and a dry discharging device, the system is characterized by consisting of a slurry pump, a sand separation cyclone, a sand separation pump pool, a sand separation dewatering screen, a dry discharge cyclone, a dry discharge dewatering screen and a dry discharge undersize funnel, the feeding end of the slurry pump is communicated with the sand selecting pump pool through a pipeline; the discharge end of the mortar pump is communicated with the feed port of the sand separation cyclone through a pipeline; the lower end of an underflow port of the sand separation cyclone is communicated witha feeding port of the sand separation dewatering screen; a screen underflow outlet of the sand separation dehydration screen is communicated with the sand separation pump pool; an overflow port of the sand separation cyclone