COMBINATION-TYPE DESALINATION APPARATUS OF FORWARD OSMOSIS(FO) AND REVERSE OSMOSIS(RO) USING MULTI-WATER SOURCE AS FEED WATER AND SEA WATER AS DRAW SOLUTION, AND SYSTEM AND METHOD FOR CONTROLLING MEMBRANE PROCESS FOR THE SAME

摘要

PURPOSE: A seawater desalination apparatus in a combination type of front osmosis and reverse osmosis using water coming in from multi-water source and a solution which induces seawater and a method for seawater desalination, an osmosis process control system, and a method are provided to reduce energy consumption as osmosis gradient is used instead of water pressure, to have less membrane contamination as compression of contaminants is not occurred on the surface of osmosis membrane, and to have a fine cleaning effect. CONSTITUTION: A seawater desalination apparatus in a combination type of front osmosis and reverse osmosis includes a treatment water reservoir (110) from multiple water sources; a front osmosis membrane unit (150); a reverse osmosis membrane unit (160) which is installed at the back of the front osmosis unit; and a filtered water reservoir (170). The front osmosis unit removes contaminants in treatment water from multiple water sources by a front osmosis phenomenon and reduces the total dissolved solid (TDS) concentration of seawater making pure water to flow in a solution which induces seawater. The reverse osmosis unit executes seawater desalination treatment getting whole amount of the solution which induces sea water through the front osmosis unit. [Reference numerals] (110) Treatment water reservoir; (170) Filtered water reservoir; (180) Inducing solution injection unit; (AA) Treatment water; (BB) Treatment area; (CC) Inlet water; (DD) First treatment water; (EE) Right-osmotic pressure unit; (FF) Pump; (GG) Sea water; (HH) Reverse-osmotic pressure unit; (II) Second treatment unit; (JJ) Filtering water; (KK) Fresh water; (LL) TDS measuring instrument; (MM) Flow meter