Salt water desalination equipment

A salt water desalination equipment comprising:

• a salt water pump operable to supply salt water to a reverse osmosis membrane component;
• a forward osmosis membrane component to which concentrated salt water discharged through another pump from the reverse osmosis membrane component is supplied;
• and
• a rotation assisting component including a bladed wheel to which mixed water discharged from the forward osmosis membrane component is supplied and which is connected to the salt water pump, wherein
• the rotation assisting component increases at least one of an electric power supplied to the salt water pump, a pressure given to the salt water pump, and rotation capacity to the salt water pump,
• wherein a pressure exchanger is disposed on an upstream side of the forward osmosis membrane component,
• the pressure exchanger increases a pressure of the supplied concentrated salt water by using the mixed water discharged from the forward osmosis membrane component.