Ultrafiltration reverse osmosis double-membrane method energy recovery system

The invention discloses an ultrafiltration reverse osmosis double-membrane method energy recovery system, which comprises an ultrafiltration system and a reverse osmosis system, wherein the ultrafiltration system comprises a first inner chamber, an ultrafiltration membrane chamber and a second inner chamber; a water turbine is arranged in the first inner chamber; a water inlet pipe and a rotary ultrafiltration membrane turntable are arranged in the ultrafiltration membrane chamber; a flow outlet catheter, a water extraction pump and an electric control device are arranged in the second inner chamber; the reverse osmosis system comprises a middle water tank, a high-pressure pump, a reverse osmosis membrane assembly, a water outlet pipe and a reverse osmosis concentrated water pipe; the electric control device is respectively and electrically connected with the water extraction pump and the high-pressure pump. The system has the advantages that a great amount of high-pressure concentrated water produced through