Electrochemical liquid treatment equipments

Abstract

The present invention aims to provide electrode compartment structures in electrochemical liquid treatment equipments, which enable stable operation using pure water as an electrode compartment liquid requiring no concentration adjustment without adverse electrode reaction. The present invention relates an electrochemical liquid treatment equipment comprising ion exchange membranes between an anode and a cathode, which has an anode compartment defined by the anode and a cation exchange membrane and a cathode compartment defined by the cathode and an anion exchange membrane ( 12 ), each of the anode compartment and cathode compartment being packed with an ion exchanger ( 14 ) composed of a fibrous a material, each of the anode and cathode ( 11 ) being formed from a liquid- and gas-permeable and electrically conductive material, and the equipment also having an electrode compartment liquid flowing chamber ( 15 ) which is formed behind each of the anode and cathode.

1 . An electrochemical liquid treatment equipment comprising ion exchange membranes between an anode and a cathode, which has an anode compartment defined by the anode and a cation exchange membrane and a cathode compartment defined by the cathode and an anion exchange membrane, each of the anode compartment and cathode compartment being packed with an ion exchanger composed of a fibrous material, each of the anode and cathode being formed from a liquid- and gas-permeable and electrically conductive material, and the equipment also having an electrode compartment liquid flowing chamber which is formed behind each of the anode and cathode.  
   
   
       2 . The electrochemical liquid treatment equipment of  claim 1  wherein the liquid- and gas-permeable and electrically conductive material is selected from expanded metals, metal diagonal nets, grid metal materials, meshed metal materials, foamed metal materials and sintered metal fiber sheets.  
   
   
       3 . The electrochemical liquid treatment equipment of  claim 1  wherein the ion exchanger composed of a fibrous material is an ion exchange woven or nonwoven fabric prepared by radiation-induced graft polymerization.  
   
   
       4 . The electrochemical liquid treatment equipment of  claim 1  wherein the anode compartment is packed with a cation exchanger and the cathode compartment is packed with an anion exchanger.  
   
   
       5 . The electrochemical liquid treatment equipment of  claim 1  wherein at least one of the anode compartment and cathode compartment is supplied with pure water or ultrapure water as an electrode compartment liquid.  
   
   
       6 . The electrochemical liquid treatment equipment of  claim 1  wherein the electrode compartment liquid flowing chamber has a vent.  
   
   
       7 . The electrochemical liquid treatment equipment of  claim 1 , which is an electrodeionization comprising cation exchange membranes and anion exchange membranes at least partially alternately arranged between an anode and a cathode to form a deionization compartment and a concentration compartment.  
   
   
       8 . The electrochemical liquid treatment equipment of  claim 1 , which is an electrodialysis comprising cation exchange membranes and anion exchange membranes at least partially alternately arranged between an anode and a cathode to form an acid compartment, an ionization compartment, an alkali compartment and a water splitting compartment.  
   
   
       9 . The electrochemical liquid treatment equipment of  claim 2  wherein the ion exchanger composed of a fibrous material is an ion exchange woven or nonwoven fabric prepared by radiation-induced graft polymerization.  
   
   
       10 . The electrochemical liquid treatment equipment of  claim 2  wherein the anode compartment is packed with a cation exchanger and the cathode compartment is packed with an anion exchanger.  
   
   
       11 . The electrochemical liquid treatment equipment of  claim 3  wherein the anode compartment is packed with a cation exchanger and the cathode compartment is packed with an anion exchanger.  
   
   
       12 . The electrochemical liquid treatment equipment of  claim 9  wherein the anode compartment is packed with a cation exchanger and the cathode compartment is packed with an anion exchanger.  
   
   
       13 . The electrochemical liquid treatment equipment of  claim 2  wherein at least one of the anode compartment and cathode compartment is supplied with pure water or ultrapure water as an electrode compartment liquid.  
   
   
       14 . The electrochemical liquid treatment equipment of  claim 3  wherein at least one of the anode compartment and cathode compartment is supplied with pure water or ultrapure water as an electrode compartment liquid.  
   
   
       15 . The electrochemical liquid treatment equipment of  claim 9  wherein at least one of the anode compartment and cathode compartment is supplied with pure water or ultrapure water as an electrode compartment liquid.  
   
   
       16 . The electrochemical liquid treatment equipment of  claim 4  wherein at least one of the anode compartment and cathode compartment is supplied with pure water or ultrapure water as an electrode compartment liquid.  
   
   
       17 . The electrochemical liquid treatment equipment of  claim 10  wherein at least one of the anode compartment and cathode compartment is supplied with pure water or ultrapure water as an electrode compartment liquid.  
   
   
       18 . The electrochemical liquid treatment equipment of  claim 11  wherein at least one of the anode compartment and cathode compartment is supplied with pure water or ultrapure water as an electrode compartment liquid.  
   
   
       19 . The electrochemical liquid treatment equipment of  claim 12  wherein at least one of the anode compartment and cathode compartment is supplied with pure water or ultrapure water as an electrode compartment liquid.  
   
   
       20 . The electrochemical liquid treatment equipment of  claim 2  wherein the electrode compartment liquid flowing chamber has a vent.