POROUS AND PERMEABLE ION-EXCHANGER AND METHOD FOR ITS MANUFACTURE Russian patent published in 2001 - IPC

FIELD: devices for electrodeionization and method for removal of ions from aqueous solution in the device for electroionization, which has a great number of dilution compartments and concentration compartments, as well as a continuous phase of the first ion-exchange material with a disperse phase of the second ion-exchange material. SUBSTANCE: the ion-exchanger has a porous and permeable continuous phase of cation-exchange resin particles of the same type or anion-exchange resin particles and a porous and permeable disperse phase of clasters of cation-exchange resin particles of some other type or anion-exchange resin particles present inside the continuous phase. The ion-exchanger has the shape of a fine layer with plane surfaces positioned opposite each other, in which the clasters of the disperse phase are continuous at least to one of the plane surfaces of the layer. The mentioned porous and permeable layer is used in the device for demineralization of aqueous solution containing a demineralization compartment with a cation-exchange membranbe on one side of the compartment and with anion-exchange membrane on the other side of the compartment and a porous layer of cation-exchange resin particles of the same type or particles on anion-exchange resin, and a porous and permeable disperse phase of clasters of cation-exchange resin particles of some other type, or particles of anion-exchange resin present inside the continuous phase, the mention layer fills the indicated compartment. The other device for demineralization of aqueous solution contained in the above porous layer filling the demineralization compartment has an anode compartment with an anode and a cahode compartment with a cathode, as well as a great number of cation-exchange membranes and anion-exchange membranes that are installed in turn between the anode compartment and the cathode compartment with formation of demineralization compartments, each being restricted by means of the anion-exchange membrane on the side of the anode and by means of the cation-exchange membrane on the side of the cathode, and concentration compartments, each being restricted by means of the cation-exchange membrane on the side of the anode and by the anion- exchange membrane on the side of the cathode. The method for demineralization of aqueous solution in this device consists in feed of water, which should be demineralized, to the demineralization compartments, passing of electric current between the cathode and anode and withdrawal of demineralized water from the device, in which the compartments are filled with above mentioned porous and permeable ion-exchanger. The method for manufacture of the mentioned porous and permeable ion-exchanger consists in installation of a gauge having a flat cover with a great number of shaped thin-walled hollow members with open upper and lower ends projecting from it in the lower direction over the preset zone of reception, and feed of aqueous suspension of cation-exchange resin particles of the same type or particles of anion- exchange resin to this gauge for formation of a continuous phase of particles of ion-exchange resin, as well as feed of aqueous suspension of cation- exchange resin particles of some other type or particles of anion-exchange resin to the great number of shaped thin-walled hollow members with formation of a great number of clasters of the disperse phase of cation-exchange particles of some other type or particles of anion-exchange resin. The other modification of the method for manufacture of the mentioned ion-exchanger consists in installation of a grate of distribution atomizers for selective distribution of aqueous suspension of cation-exchange resin particles or particles of anion-exchange resin according to the preset zone of cation- exchange resin particles of the same type or particles of anion-exchange resin for formation of a continuous phase of the mentioned particles of ion-exchange resin, as well as feed of aqueous suspension of cation-exchange resin particles of some other type or particles of anion-exchange resin in accordance with the preset picture of distribution so as to form a great number of clasters of the disperse split phase cation-exchange resin particles of some other type or particles of anion-exchange resin. One more modification of the method for manufacture of the ion-exchanger consists in cutout of a great number of shaped clasters of cation-exchange particles or particles of anion-exchange resin from the first sheet of the mentioned resin particles with formation of a continuous phase of the mentioned particles of ion-exchange resin containing a great number of orifices, as well as cutout of a great number of identical clasters of cation-exchange resin particles of some other type or particles of anion-exchange resin from another sheet of the mentioned resin particles, and introduction of the mentioned cut out clasters of cation-exchange resin particles of some other type or particles of anion-exchange resin in the orifices in the first sheet. EFFECT: enhanced quality of water purification. 35 cl, 7 dwg