Method for producing electrolytic water and apparatus for producing the same

• US 5,858,202 A
• Filed: 01/24/1997
• Issued: 01/12/1999
• Est. Priority Date: 01/30/1996
• Status: Expired due to Term

• Current Assignee: Zenkoku-Mokko-Kikai-Kan, Inc.
• Original Assignee: Zenkoku-Mokko-Kikai-Kan, Inc.
• Inventors: Nakamura, Tadamasa
• Primary Examiner(s): Phasge, Arun S.
• Application Number:
  US08/788,196
• Time in Patent Office: 718 Days
• Field of Search: 205/746, 205/770, 204/257, 204/275
• US Class Current: 205/746
• CPC Class Codes: C02F 1/4618 for producing "ionised" acidic or basic water
• CPC Class Codes: C02F 1/4674 with halogen or compound of halogens, e.g. chlorine, bromine
• CPC Class Codes: C02F 2201/4611 Fluid flow
• CPC Class Codes: C02F 2201/46115 Electrolytic cell with membranes or diaphragms
• CPC Class Codes: C02F 2209/04 Oxidation reduction potential [ORP]
• CPC Class Codes: C02F 2209/05 Conductivity or salinity
• CPC Class Codes: C02F 2209/06 pH

Abstract

The invention provides a method and apparatus for producing an electrolytic water whereby one electrolytic water used in compliance with its intended use is transformed into a water more effectively used and the by-product electrolytic water, previously disposed as virtually useless, is transformed into a water which can be effectively used by use of at least two electrolyzer in series. At least one of an outlet for a primary anodic electrolytic water in a primary electrolyzer and an outlet for a primary cathodic electrolytic water in a primary electrolyzer is connected to an inlet of a secondary electrolyzer through a first switching valve and a second switching valve. The anodic electrolytic water only, the primary cathodic electrolytic water only, or mixture of the primary anodic and primary cathodic electrolytic water is fed to the secondary electrolyzer to be electrolyzed again. A chlorine remover is provided within the secondary inlet for connecting the primary electrolyzer with the secondary electrolyzer and it removes chlorine from a primary electrolytic water, and afterward, the filtered water is electrolyzed again in the secondary electrolyzer. Tertiary electrolysis of the secondary anodic electrolytic water, produced by electrolysis of the primary anodic electrolytic water, will produce a tertiary anodic electrolytic water that exhibits a remarkably high bactericidal effect.

Claims

1. An apparatus for producing an electrolytic water, said apparatus comprising:

a primary electrolyzer including a primary anode and a primary cathode and a separating membrane dividing the interior of the primary electrolyzer into a primary anode compartment containing the primary anode and a cathode compartment containing the primary cathode;

a secondary electrolyzer including a secondary anode and a secondary cathode and a separating membrane dividing the secondary electrolyzer into a secondary anode compartment containing the secondary anode and a secondary cathode compartment containing the secondary cathode;

a first primary outlet for primary anodic water connected to the primary anode compartment;

a first switching valve connected to the first primary outlet;

a second primary outlet for primary cathodic water connected to the primary cathode compartment;

a second switching valve connected to the second primary outlet;

a combined primary outlet passage for connecting the first switching valve with the second switching valve;

a secondary inlet connecting the combined primary outlet with the secondary electrolyzer;

a first secondary outlet for secondary anodic water connected to the secondary anode compartment;

a second secondary outlet for secondary cathodic water connected to the secondary cathode compartment; and

a chlorine remover provided in the secondary inlet, between the primary electrolyzer and the secondary electrolyzer.

2. An apparatus for producing an electrolytic water as claimed in claim 1, additionally comprising:

a third switching valve upstream of the chlorine remover in the secondary inlet; and

a bypass connecting the third switching valve with the secondary inlet at a point downstream of the chlorine remover, whereby water may be passed either through the chlorine remover or through the bypass by switching the third switching valve.

3. An apparatus for producing an electrolytic water as claimed in claim 1, further comprising:

a secondary anodic water switching valve in the first secondary outlet; and

an anodic water communication passage connecting the secondary anodic water switching valve with the first switching valve;

whereby the primary anodic water passing through the first switching valve from the first primary outlet and the secondary anodic water passing through the secondary anodic water switching valve from the first secondary outlet may be mixed in the anodic water communication passage and removed together through the first primary outlet.

4. An apparatus for producing an electrolytic water as claimed in claim 1, further comprising:

a secondary cathodic water switching valve in the second secondary outlet; and

a cathodic water communication passage connecting the secondary cathodic water switching valve with the second switching valve;

whereby cathodic water passing through the second switching valve from the second primary outlet and the cathodic water passing through the secondary cathodic water switching valve from the second secondary outlet are mixed in the cathodic water communication passage and removed together through the second primary outlet.

5. A method for producing electrolytic water product comprising:

feeding a raw water to a primary electrolyzer having an interior divided into a primary anode compartment containing an anode and a primary cathode compartment containing a cathode;

electrolyzing the raw water within the primary electrolyzer to produce a primary anodic water and a primary cathodic water;

removing chlorine by passing at least one said primary anodic water and said primary cathodic water through a chlorine filter to produce a chlorine free water;

feeding the chlorine free water to a secondary electrolyzer having an interior divided into a secondary anode compartment containing an anode and a secondary cathode compartment containing a cathode; and

electrolyzing the chlorine free water within the secondary electrolyzer to produce a secondary anodic water and a secondary cathodic water.

6. A method for producing an electrolytic water as claimed in claim 5, wherein the primary anodic water only is passed through the chlorine filter and electrolyzed in the secondary electrolyzer.

7. A method for producing an electrolytic water as claimed in claim 5, further comprising:

feeding at least one of the secondary anodic water and the secondary cathodic water to a tertiary electrolyzer having an interior divided into a tertiary anode compartment containing an anode and a tertiary cathode compartment containing a cathode; and

electrolyzing the feed to the tertiary electrolyzer to produce a tertiary anodic water and a tertiary cathodic water.

8. A method for producing an electrolytic water as claimed in claim 5 wherein the primary cathodic water only is passed through the chlorine filter and electrolyzed in the secondary electrolyzer.

9. A method for producing an electrolytic water as claimed in claim 5 wherein a mixture of the primary anodic water and the primary cathodic water is passed through the chlorine filter and then electrolyzed in the secondary electrolyzer.