Water treatment apparatus and water treatment method

Abstract

A water treatment apparatus includes: a first granular electrode member and a second granular electrode member stored in a water treatment unit and provided so as to be separated from each other; a power supply unit which applies voltage between the first granular electrode member and the second granular electrode member so that ions contained in treatment target water supplied from one side of the water treatment unit are adsorbed to the first granular electrode member and the second granular electrode member; and a washing water supply pump which causes washing water to flow from the other side of the water treatment unit to the one side of the water treatment unit, thereby washing the first granular electrode member and the second granular electrode member, wherein the first granular electrode member and the second granular electrode member each include a plurality of flowable granular electrode members.

1 : A water treatment apparatus comprising:
 a first electrode and a second electrode stored in a water treatment unit and provided so as to be separated from each other by a separator which has an electric insulation property and allows a liquid to pass therethrough;   a power supplier which is connected to a pair of collectors provided at both ends of the water treatment unit and applies voltage between the first electrode and the second electrode via the pair of collectors so that ions contained in treatment target water supplied from one side of the water treatment unit via an inlet port are adsorbed to the first electrode and the second electrode, thereby performing desalination and generating desalinated water; and   a washing water supply pump which causes washing water to flow from the other side of the water treatment unit to the one side of the water treatment unit, thereby washing the first electrode and the second electrode, wherein   the first electrode and the second electrode each include a plurality of flowable granular electrode members, and the inlet port is provided with a flow-out preventing member for preventing the granular electrode members from flowing out from the water treatment unit.   
     
     
         2 : The water treatment apparatus according to  claim 1 , wherein
 the water treatment unit includes a pressing portion for pressing the first electrode and the second electrode.   
     
     
         3 : The water treatment apparatus according to  claim 1 , further comprising:
 an additive supplier which supplies an additive to the washing water; and   a controller which determines whether or not to add the additive to the washing water.   
     
     
         4 : The water treatment apparatus according to  claim 3 , further comprising a reverse washing water tank which stores the desalinated water as the washing water. 
     
     
         5 : The water treatment apparatus according to  claim 4 , wherein
 the additive supplier supplies the additive to the washing water stored in the reverse washing water tank.   
     
     
         6 . (canceled) 
     
     
         7 : The water treatment apparatus according to  claim 5 , wherein
 the additive supplier is provided to a pipe connecting the water treatment unit and the washing water supply pump.   
     
     
         8 : The water treatment apparatus according to  claim 3 , wherein
 the additive supplier generates the additive and directly injects the additive through an additive injection port provided to the water treatment unit.   
     
     
         9 : The water treatment apparatus according to  claim 8 , wherein
 a plurality of additive injection ports are provided to the water treatment unit.   
     
     
         10 - 16 . (canceled) 
     
     
         17 : The water treatment apparatus according to  claim 1 , further comprising a circulation path through which the washing water flowing from the one side of the water treatment unit is sent to the other side of the water treatment unit. 
     
     
         18 : The water treatment apparatus according to  claim 1 , wherein
 the water treatment unit comprises a plurality of water treatment units connected in series and sharing a reverse washing water tank which stores the desalinated water as the washing water.   
     
     
         19 . (canceled) 
     
     
         20 : The water treatment apparatus according to  claim 1 , further comprising an air pump which injects air into the water treatment unit during washing of the first electrode and the second electrode. 
     
     
         21 : A water treatment method comprising:
 a desalination step of supplying treatment target water from one side of a water treatment unit which stores a first electrode and a second electrode provided so as to be separated from each other by a separator which has an electric insulation property and allows a liquid to pass therethrough, and applying voltage to the first electrode and the second electrode via a pair of collectors provided at both ends of the water treatment unit, so that ions contained in the treatment target water are adsorbed to the first electrode and the second electrode, thereby performing desalination and generating desalinated water; and   a washing step of washing the first electrode and the second electrode by causing washing water to flow from the other side of the water treatment unit to the one side of the water treatment unit, wherein   in the washing step, the first electrode and the second electrode are washed while granular electrode members contained in the first electrode and the second electrode are caused to flow in the water treatment unit.   
     
     
         22 : The water treatment method according to  claim 21 , wherein
 the first electrode and the second electrode are pressed so as to be brought into a pressed state, the desalination step is executed while the pressed state is kept, and the washing step is executed after the pressed state is released.   
     
     
         23 : The water treatment method according to  claim 21 , further comprising a step of determining whether or not to add an additive to the washing water, between after the desalination step and before the washing step. 
     
     
         24 : The water treatment method according to  claim 21 , wherein
 the desalinated water generated in the desalination step is stored, and the stored desalinated water is used as the washing water.   
     
     
         25 : The water treatment method according to  claim 23 , wherein
 after the first electrode and the second electrode are washed using the washing water to which a first additive is added, the first electrode and the second electrode are washed using the washing water to which a second additive is added.   
     
     
         26 - 32 . (canceled) 
     
     
         33 : The water treatment method according to  claim 21 , wherein
 in the washing step, the washing water flowing out from the one side of the water treatment unit is sent to the other side of the water treatment unit, whereby the washing water is circulated.