Patent ID: 8956521
Filing Date: 2015-02-17
Classification: B01D,B33Y,C02F,C25B,H01F,Y10T

Abstract:
1. An electrical purification apparatus comprising: a cell stack comprising alternating ion diluting compartments and ion concentrating compartments, each alternating ion diluting and ion concentrating compartment defined by an anion exchange membrane and a cation exchange membrane, each of the ion diluting compartments constructed and arranged to provide a fluid flow in a first direction, and each of the ion concentrating compartments constructed and arranged to provide a fluid flow in a second direction that is different from the first direction; a first electrode at a first end of the cell stack; a second electrode at a second end of the cell stack; a housing enclosing the cell stack, at least a portion of a periphery of the cell stack secured to the housing; a frame positioned between the housing and the cell stack to provide a first modular unit; and a blocking spacer comprising a screen portion positioned inside of at least one of an ion depleting compartment and an ion concentrating compartment, and a solid portion positioned outside of the at least one of the ion depleting compartment and the ion concentrating compartment, the solid portion of the blocking spacer having an edge in contact with the housing.