초록 ▼

A method of manufacturing an apparatus for the electrodeionization of a fluid includes determining the flow rate of the fluid to be deionized, its initial concentration of ionic impurities, a desired post-processing concentration of ionic impurities and appropriately selecting the number of diluting

A method of manufacturing an apparatus for the electrodeionization of a fluid includes determining the flow rate of the fluid to be deionized, its initial concentration of ionic impurities, a desired post-processing concentration of ionic impurities and appropriately selecting the number of diluting compartments for use in the apparatus and the electrical current to be applied between the anode and cathode in the apparatus and manufacturing the apparatus accordingly. A method of operating an apparatus for electrodeionization of a fluid includes monitoring the concentration of ionic impurities of the fluid to be deionized, monitoring the concentration of ionic impurities of the fluid which has been processed by the apparatus, determining the flow rate of the fluid to be deionized and altering the electrical current applied between the anode and cathode to maintain a predefined relationship between the drop in the concentration of ionic impurities of the fluid through the apparatus and the electrical current and the flow rate within a selected range of values. A novel electrodeionization apparatus includes an electrodeionization core, means for determining the concentration of the ionic impurities of fluid to be processed within the apparatus, a means for determining the concentration of the ionic impurities conductivity of fluid which has been processed within the apparatus, a measuring device to determine the flow rate of fluid processed by the apparatus, a current sensing device to measure the electrical current applied to the anode and cathode and a control device to process these values and to alter the electrical current applied to the anode and cathode of the apparatus to maintain a predefined ratio between the measured values within a selected range of values.

대표청구항 ▼

[ We claim:] [1.] A method of manufacturing an EDI apparatus for the deionization of a first liquid supplied at or below a given maximum flow rate (Q), said apparatus comprising a cathode and an anode with a number of diluting compartments and concentrating compartments positioned between the cathod

[ We claim:] [1.] A method of manufacturing an EDI apparatus for the deionization of a first liquid supplied at or below a given maximum flow rate (Q), said apparatus comprising a cathode and an anode with a number of diluting compartments and concentrating compartments positioned between the cathode and the anode and arranged in an alternating manner, said apparatus including means for passing said first liquid through said diluting compartments at or below said given maximum flow rate and means for passing a second liquid through said concentrating compartments to receive ionic impurities from said first liquid when a electrical current is applied between said cathode and said anode, comprising the steps of:determining the concentration of ionic impurities in the first liquid to be processed within said apparatus;selecting a desired final concentration of ionic impurities for the first liquid after it has been processed within said apparatus;selecting the number (n) of diluting compartments to be included in said apparatus, said selected number of diluting compartments being at least one;selecting the number of concentrating compartments to be included in said apparatus, the selected number of concentrating compartments being at least one greater than said selected number of diluting compartments;selecting an electrical current (I) to be applied between said anode and cathode, wherein the selection of said number of diluting compartments and the selected electrical current to be applied is such E.sub.f is greater than 1 in ]EQU7 ] where F is the Faraday constant to convert coulombs to moles, .DELTA.c.sub.i is the difference in the concentration of impurity i in the first liquid to be processed and the selected final concentration of impurity i, z.sub.i is the charge of impurity i and .SIGMA..DELTA.c.sub.i .times.z.sub.i is selected from the larger of the summation over the cationic impurities and the anionic impurities; andassembling said EDI apparatus with said selected number of diluting compartments.