Seawater desalination system and resourcezation system

A seawater resourcezation system, comprising a seawater desalination system, a salt separation nanofiltration device, a univalent concentrated brine tank and a bivalent concentrated brine tank, wherein the seawater desalination system comprises a seawater replenishment pipeline, a raw water tank, a seawater pretreatment device, a seawater desalination device, a desalination water tank and a nanofiltration recovery device, wherein the raw water tank, the seawater pretreatment device, the seawater desalination device and the desalination water tank are successively connected through a pipeline from left to right;

• the seawater desalination device is connected with the nanofiltration recovery device through a pipeline;
• the desalination water tank is connected with the nanofiltration recovery device through a pipeline, and the connecting pipeline between the desalination water tank and the nanofiltration recovery device is provided with an electric flushing water inlet valve;
• and the nanofiltration recovery device is connected with the raw water tank through a pipeline,
• the salt separation nanofiltration device is connected with the nanofiltration recovery device through a pipeline, and the salt separation nanofiltration device is connected with the desalination water tank through a pipeline;
• and the univalent concentrated brine tank and the bivalent concentrated brine tank are connected with the salt separation nanofiltration device through a pipeline respectively, and
• the seawater desalination device comprises a first voltage-stabilized energy recovery device, a first circulating booster pump and a seawater desalination membrane block which are connected successively from left to right through a pipeline;
• the first voltage-stabilized energy recovery device is connected with the variable frequency medium pressure pump through a pipeline;
• the seawater desalination membrane block is connected with the desalination water tank through a pipeline;
• a first flushing pipe is installed on the first voltage-stabilized energy recovery device, and a first return regulating valve and a first electric flushing valve are installed successively on the first flushing pipe from left to right;
• the seawater desalination membrane block is connected with the nanofiltration recovery device through a pipeline, and the connecting pipeline between the seawater desalination membrane block and the nanofiltration recovery device is provided with a first concentrated water regulating valve.