TW201102457A - Method and apparatus for producing high concentration hypochloric acid sterilization water - Google Patents

Abstract

The invention provides a method for batchly or continuously producing high concentration hypochloric acid sterilization water through diaphragm free electrolysis manner in a first stage and an acid-base adjustment manner in a second stage. The electrolysis manner in the first stage uses a diaphragm free electrolysis device to electrolyze a chlorine-containing electrolyte solution to prepare alkali electrolyte water. The acid-base regulation manner in the second stage electrolyzes alkali electrolytic water prepared by the diaphragm free electrolysis device in an anode side electrolysis bath by using a diaphragm electrolysis device. Alternatively, pH value of the alkali electrolytic water is regulated by cation exchange manner so that pH value falls within a range between 5.5 and 6.5.

Description

201102457 VI. Description of the Invention: [Technical Field] The present invention relates to a method for producing hypochloric acid sterilized water, and more particularly to a method for producing high-concentration hypochlorite sterilized water by a two-stage electrolysis method. The present invention also relates to a manufacturing apparatus for hypochloric acid sterilized water. [Prior Art] Hypochlorous acid is known to have good sterilization ability, and can be simply obtained by electrolyzing a chlorine-containing electrolyte solution. For example, National Patent Publication No. 301644 I conventionally uses a non-diaphragm electrolysis apparatus to electrolyze a chlorine-containing electrolyte solution to prepare hypochlorous acid water having a sterilizing ability. However, electrolyzed water produced by electrolysis without a diaphragm electrolysis device is generally weakly alkaline. Further, the concentration of hypochlorous acid is related to pH ,, and the pH is in the range of 5.5 to 6.5, and the hypochlorous acid concentration is up to 100%. Therefore, in order to increase the hypochlorous acid concentration, the alkaline electrolyzed water prepared by the diaphragmless electrolysis apparatus requires an additional addition of acid to lower the pH. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a high concentration of hypochloric acid sterilized water, which is prepared by a two-stage electrolysis method to adjust an alkaline electrolyzed water into an acidic electrolyzed water without the step of adding an additional acid. A high concentration of hypochlorous acid sterilized water. Another object of the present invention is to provide a high concentration hypochloric acid sterilized water manufacturing apparatus which is suitable for producing high concentration hypochlorous acid sterilizing water by two-stage electrolysis. Another object of the present invention is to provide a method for producing high-concentration hypochlorite sterilized water, which is prepared by a first-stage non-diaphragm electrolysis method and a second-stage cation exchange method to reconcile electrolyzed water into an acidic electrolyzed water without a permeation amount 201102457 A high concentration of hypochloric acid sterilized water can be prepared by externally adding an acid. In accordance with the present invention, a high concentration of hypochlorite sterilized water batch or continuous manufacturing will be understood by those of ordinary skill in the art to which this invention pertains. [Embodiment] Referring to Fig. 1, there is shown a manufacturing apparatus for high-concentration hypochlorite sterilized water according to a first embodiment of the present invention, which is denoted by the reference numeral 10. The apparatus 10 for producing high-concentration hypochlorite sterilized water includes a separator-free electrolysis device 12 and a diaphragm electrolysis device 14. The diaphragmless electrolysis device 12 is provided with an anode 20 and a cathode 22. The diaphragm electrolysis device 14 includes an anode side electrolytic cell 18 and a cathode side electrolytic cell 16 separated by a separator 28. An anode 26 is disposed in the anode side electrolytic cell 18, and a cathode 24 is disposed in the cathode side electrolytic cell 16. The diaphragmless electrolysis device 12 is connected in series with the diaphragm electrolysis device 14 and disposed upstream of the diaphragm electrolysis device 14, so that the alkaline electrolyzed water prepared by the diaphragmless electrolysis device 12 can be automatically guided to the anode side electrolysis cell of the diaphragm electrolysis device 14. 18. Next, a manufacturing method of high-concentration hypochlorite sterilized water according to the present invention will be described with reference to a manufacturing apparatus 10 for high-concentration hypochlorite sterilized water shown in Fig. 1. The present invention is characterized by a two-stage electrolysis method in which the electrolysis reaction in the first stage is performed by the diaphragmless electrolysis device 12 to prepare alkaline electrolyzed water, and the electrolysis reaction in the second stage is performed by the diaphragm electrolysis device 14 to adjust the alkaline electrolyzed water. The pH 値' causes the pH to fall within a range that increases the concentration of hypochlorous acid. Injecting a chlorine-containing electrolyte solution, such as a sodium chloride solution, including supersaturated, -4-I S3 201102457 saturated or unsaturated brine, seawater, brine or physiological saline, into the membrane-free electrolysis device 12» as a chlorine-containing electrolyte Not limited to sodium chloride, alkali metal chlorides, alkaline earth metal chlorides or chlorine-containing salts are also applicable to the manufacture of hypochlorite sterilized water. The sodium chloride solution is first electrolyzed by the diaphragmless electrolysis device 12. In the electrolysis process of the first stage, at the anode 20, the water H20 releases electrons e_ to generate oxygen 〇2 and hydrogen ions H+, while the chloride ions (:1_ liberate electrons generate chlorine gas Cl2. chlorine gas Cl2 dissolves The sodium chloride solution in the electrolytic cell 10 thus produces hydrochloric acid HC1, hypochlorous acid HC10 and sodium hypochlorite NaCIO in the diaphragmless electrolysis device 12. At the cathode 22, the water H20 receives electrons e. generates hydrogen gas and hydrogen ions OH_. The oxygen ion OH is combined with the sodium ion Na + to produce sodium hydroxide NaO Η. The first stage of the electrolysis reaction is continued until the free chlorine (FAC) in the electrolyzed water reaches a predetermined concentration. The electrolyzed water produced by electrolysis of device 12 will be alkaline or weakly alkaline. It should be understood that the free chlorine referred to herein refers to the sum of hypochlorite HOC1, hypochlorite ion ocr and chlorine Cl2. The electrolyzed water electrolyzed by the diaphragm electrolysis device 12 is guided to the anode side electrolysis cell 18 of the diaphragm electrolysis device 14, and the cathode side electrolysis cell 16 of the membrane electrolysis device 14 houses the electrolyte solution. Next, the diaphragm electrolysis device 14 performs the second stage. In the electrolysis process of the second stage, at the anode of the anode side electrolytic cell 18, the water HW releases electrons to generate oxygen 〇 2 and hydrogen ions H+, while the chloride ion C1 ' releases electrons e· The chlorine gas C12 causes the hydrogen ion H + concentration of the anode side electrolytic cell 18 to gradually increase, and the FAC gradually increases. The second stage electrolysis 201102457 reacts for a predetermined time, so that the pH falls within the range of 5. 5 to 6.5. 2 is a view showing a manufacturing apparatus for high-concentration hypochlorite sterilized water according to a second embodiment of the present invention, which is denoted by the reference numeral 40. The high-concentration hypochloric acid sterilized water manufacturing apparatus 40 includes a three-electrode type diaphragm electrolysis apparatus 42 and The switching device 44. The three-electrode diaphragm electrolysis device 42 includes an anode side electrolytic cell 46 and a cathode side electrolytic cell 48 separated by a separator 52. The first electrolytic cell 46 is provided with a first electrode 54 and a second electrode 56, and 2 The electrolytic cell 48 is provided with a third electrode 58. The switching device 44 is for changing the polarity arrangement of the electrodes. Preferably, the first electrode 54 is constantly or controllably acted as an anode. Switching device 44 switching, second and third electrodes One of 56, 58 acts as a cathode while the other is idle. When the second electrode 56 acts as a cathode, it cooperates with the first electrode 54 acting as an anode, and the first electrolytic cell 46 acts as a diaphragmless electrolysis device. For performing the first-stage electrolysis reaction, the third electrode 58 is idle at this time. When the third electrode 58 acts as a cathode, 'the second electrode 54 that functions as an anode, the first electrolytic cell 46 and the second electrolytic cell The 48-series acts as a diaphragm electrolyzer "for performing the second-stage electrolysis reaction, and the second electrode 56 is left idle. The principle of the electrolysis reaction in the first stage and the second stage is the same as that of the above embodiment, and the description thereof will be omitted. The third embodiment of the present invention is shown in Fig. 3. The three-electrode diaphragm electrolysis device can be modified into a four-electrode diaphragm electrolysis device by disposing the fourth electrode 60 in the second electrolytic cell 48. When one of the first electrode 54 and the second electrode acts as a cathode and the other electrode 102102457 of the first electrode 54 and the second electrode 56 acts as an anode, the first electrolytic cell 46 acts as a diaphragmless electrolysis device for The first stage of the electrolysis reaction is carried out. When the third electrode 58 and/or the fourth electrode 60 act as a cathode and the first electrode 54 and/or the second electrode 56 act as an anode, the first electrolytic cell 46 and the second electrolytic cell 48 act as a diaphragm electrolysis device. Used to carry out the second stage of the electrolysis reaction. In another alternative, when the third electrode 58 and the fourth electrode 60 act as a cathode and the other of the third electrode 58 and the fourth electrode 60 acts as an anode, the second electrolytic cell 48 acts as a cathode. In the diaphragmless electrolysis apparatus, φ is used to carry out the first-stage electrolysis reaction. When the third electrode 58 and/or the fourth electrode 60 act as an anode and the first electrode 54 and/or the second electrode 56 act as a cathode, the first electrolytic cell 46 and the second electrolytic cell 48 act as a diaphragm electrolyzer. Used to carry out the second stage of the electrolysis reaction. Regarding the electrolysis reactions of the first stage and the second stage, the principle is the same as that of the foregoing embodiment, and the description thereof will be omitted. In the embodiments shown in Figures 2 and 3, by changing the polarity configuration of the electrodes, a two-stage electrolytic reaction can be completed in a single three- or four-pole diaphragm electrolyzer. According to the present invention, The acid-base adjustment is not limited to the electrolytic reaction by the diaphragm electrolysis device. The electrolyzed water produced by the first-stage electrolysis reaction may be guided through the cation exchange resin after the first-stage electrolysis reaction. Due to the exchange between the sodium ions present in the electrolyzed water and the hydrogen ions of the cation exchange resin, the pH of the electrolyzed water flowing through the cation exchange resin is lowered, thereby adjusting the pH 在 in the range of 5.5 to 6.5. The apparatus for producing high-concentration hypochlorite sterilized water according to the fourth embodiment of the present invention is denoted by the reference numeral 30 as a whole. 201102457 The high-density hypochloric acid sterilized water manufacturing apparatus 30 includes a filter 32, two diaphragmless electrolysis devices 34, and an ion exchanger 36. The raw water to be treated is purified by the filter 32, continuously flows through the two diaphragmless electrolysis devices 34, and is electrolyzed into alkaline electrolyzed water. Next, the alkaline electrolyzed water is passed through an ion exchanger 36 containing a cation exchange resin to be adjusted into acidic electrolyzed water, particularly acidic electrolyzed water having a pH of 5·5 to 6·5. A chlorine-containing electrolyte may be added before or after the raw water to be treated flows through the filter 32. The flow rate of the electrolyzed water, the number of non-diaphragm electrolyzers, and the content of the cation exchange resin can be adjusted as needed. While the invention has been described with respect to the preferred embodiments of the present invention, it is understood that many changes and modifications may be made to those of ordinary skill in the art to which the invention pertains, without departing from the spirit and scope of the invention. . Therefore, the invention is not limited to the disclosed embodiments, but is intended to be included in the scope of the appended claims. range. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a manufacturing apparatus for high-concentration hypochlorite sterilized water according to the present invention; and FIG. 2 shows a second manufacturing apparatus of high-concentration hypochlorite sterilized water according to the present invention. Embodiment 3 wherein a three-electrode diaphragm electrolysis device is employed; FIG. 3 shows a third embodiment of a manufacturing apparatus for high-concentration hypochlorite sterilized water according to the present invention, wherein a four-electrode diaphragm electrolysis device is employed; and FIG. 4 A fourth embodiment of a manufacturing apparatus for high-concentration hypochlorite sterilized water according to the present invention is shown in which an ion exchanger is employed. 201102457 [Explanation of main component symbols] ' ίο High-density hypochloric acid sterilized water manufacturing equipment 12 Non-diaphragm electrolysis device 14 Diaphragm electrolysis device 18 Anode side electrolysis cell 16 Cathode side electrolysis cell 2 0 Anode 22 Cathode 24 Anode Lu 26 Cathode 28 Separator 30 High-density hypochlorite sterilized water manufacturing equipment 32 Filter 34 Non-diaphragm electrolysis unit 36 Ion exchanger 40 High-concentration hypochlorous acid sterilized water manufacturing apparatus I 42 Three-pole type diaphragm electrolysis unit 42 44 Switching unit 46 Anode side Electrolyzer 48 Cathode side electrolytic cell 52 Separator 5 2 54 First electrode 56 Second electrode 5 8 Third electrode 60 Fourth electrode [S3

Claims (1)

201102457 VII. Patent application scope: 1. A method for manufacturing high concentration hypochlorite sterilized water, which comprises the following steps: 9 providing a diaphragmless electrolysis device, wherein an anode and a cathode are disposed; and a diaphragm electrolysis device comprising An anode-side electrolytic cell and a cathode-side electrolytic cell, which are separated by a separator, are disposed in the anode-side electrolytic cell, and an anode is disposed in the cathode-side electrolytic cell, and a conductive electrolyte solution is accommodated in the electrolytic cell: Electrolyzing a chlorine-containing electrolyte solution to prepare alkaline electrolyzed water; guiding the alkaline electrolyzed water to an anode-side electrolysis cell of the diaphragm electrolyzer; and electrolyzing the alkaline electrolyzed water by the diaphragm electrolysis device for a predetermined time The pH of the alkaline electrolyzed water is adjusted in the range of 5. 5 to 6.5, thereby producing a high concentration of hypochloric acid sterilized water. 2. The manufacturing method according to claim 1, wherein the step of electrolyzing the chlorine-containing electrolyte solution to prepare the alkaline electrolyzed water is continued until the free chlorine in the alkaline electrolysis φ water reaches a predetermined concentration. 3. The manufacturing method of claim 1 or 2, wherein the chlorine-containing electrolyte comprises an alkali metal chloride, an alkaline earth metal chloride or a chlorine-containing salt. 4) The manufacturing method according to claim 1 or 2, wherein, in the case where the solute of the chlorine-containing electrolyte solution is sodium chloride, the chlorine-containing electrolyte solution comprises supersaturated, saturated or unsaturated brine, seawater, brine Or physiological saline. 5. A method for producing high-concentration hypochlorite sterilized water, comprising the following steps: [S] -10- 201102457 A multi-pole diaphragm electrolysis device comprising a first electrolytic cell separated by a diaphragm and a second electrolysis The first electrolytic cell is provided with a first electrode and a second electrode, and the second electrolytic cell is provided with at least a third electrode and accommodates a conductive electrolyte solution. The first electrode is constantly or controllably Acting as an anode ' and the 2 and 3 electrodes can be switched to act as an anode or a cathode; and preparing a chlorine-containing electrolyte solution in the first electrolytic cell by a first electrode acting as an anode and a second electrode acting as a cathode The alkaline electrolysis electrolyzes the alkaline electrolyzed water in the first electrolysis cell by a first electrode acting as an anode and a third electrode acting as a cathode for a predetermined time to adjust the pH of the alkaline electrolyzed water to A range of 5.5 to 6.5 to produce a high concentration of hypochloric acid sterilized water. 6. The manufacturing method of claim 5, wherein the step of electrolyzing the chlorine-containing electrolyte solution in the first electrolytic cell to prepare alkaline electrolyzed water is continued until the free chlorine in the alkaline electrolyzed water reaches a predetermined concentration; Φ 7· The manufacturing method of claim 5, wherein the chlorine-containing electrolyte comprises an alkali metal chloride, an alkaline earth metal chloride or a chlorine-containing salt. 8. The scope of claim 5 or 6 The manufacturing method, wherein, in the case where the solute of the chlorine-containing electrolyte solution is sodium chloride, the chlorine-containing electrolyte solution includes supersaturated, saturated or unsaturated saline, sea water, brine or physiological saline. A method for producing high-concentration hypochlorite sterilized water, comprising the steps of: providing a diaphragmless electrolysis device having an anode and a cathode disposed therein; [S3 -11 - 201102457 providing an ion exchanger accommodating a cation Exchanging resin; electrolyzing a chlorine-containing electrolyte solution by the diaphragmless electrolysis device to prepare alkaline electrolyzed water; adjusting the pH of the alkaline electrolyzed water by adjusting the alkaline electrolyzed water through the ion exchanger A range of 5.5 to 6.5 to produce a high concentration of hypochloric acid sterilized water. 10. The manufacturing method according to claim 9, wherein the step of electrolyzing the chlorine-containing electrolyte solution to prepare the alkaline electrolyzed water is continued until the free chlorine in the alkaline electrolysis water reaches a predetermined concentration. 11. The method of manufacture of claim 9 or 10, wherein the chlorine-containing electrolyte comprises an alkali metal chloride, an alkaline earth metal chloride or a chlorine-containing salt. 12. The manufacturing method according to claim 9 or 10, wherein, in the case where the solute of the chlorine-containing electrolyte solution is sodium chloride, the chlorine-containing electrolyte solution comprises supersaturated, saturated or unsaturated brine, seawater, brine Or physiological saline. Φ 13. A method for producing high-concentration hypochlorite sterilized water, comprising the steps of: electrolyzing a chlorine-containing electrolyte solution by a diaphragm-free electrolysis method to prepare alkaline electrolyzed water; and electrolyzing the anode on the anode side by electrolysis The alkaline electrolyzed water is adjusted to a pH of 5.5 to 6.5 for a predetermined period of time to produce a high concentration of hypochloric acid sterilized water. I4. A method for producing high-concentration hypochlorite sterilized water, comprising the steps of: electrolyzing a chlorine-containing electrolyte solution by a diaphragm-free electrolysis method to prepare alkaline electrolyzed water; and -12- [S] 201102457 by ion exchange method The pH of the alkaline electrolyzed water is adjusted in the range of 5·5 to 6_5 to produce a sputum concentration of hypochlorite sterilized water. 15. A high concentration hypochlorite sterilized water manufacturing apparatus comprising a diaphragmless electrolysis device and a diaphragm electrolysis device, wherein the diaphragmless electrolysis device is provided with an anode and a cathode for electrolyzing a chlorine-containing electrolyte solution, The alkaline electrolysis water is prepared. The diaphragm electrolysis device includes an anode side electrolysis cell and a cathode side electrolysis cell separated by a separator. An anode is disposed in the anode side electrolysis cell, and a cathode is disposed in the cathode side electrolysis cell. The diaphragmless electrolysis device and the diaphragm electrolysis device are configured such that the alkaline electrolyzed water prepared by the diaphragmless electrolysis device can be guided to the anode side electrolysis cell of the diaphragm electrolysis device, and the anode electrolysis cell is electrolyzed by the diaphragm electrolysis device. The alkaline electrolyzed water is adjusted to a pH of 5.5 to 6.5 by the pH of the alkaline electrolyzed water to produce a high concentration of hypochloric acid sterilized water. 16. The manufacturing apparatus of claim 15, wherein the chlorine-containing electrolyte comprises an alkali metal chloride, an alkaline earth metal chloride or a chlorine-containing salt. Φ 17. The manufacturing method of claim 15, wherein in the case where the solute of the chlorine-containing electrolyte solution is sodium chloride, the chlorine-containing electrolyte solution comprises supersaturated, saturated or unsaturated brine, seawater, brine or Physiological saline solution. 18. A manufacturing apparatus for high-concentration hypochlorite sterilized water, comprising a three-electrode diaphragm electrolysis apparatus including a first electrolytic cell separated by a diaphragm and a second electrolytic device, and a switching device a first electrode and a second electrode are disposed in the first electrolytic cell, and a third electrode is disposed in the second electrolytic cell, and the first electrode system [S3 - 13 - 201102457 can function constantly or controllably Forming an anode, and each of the second and third electrodes can be switched to function as an anode or a cathode by the switching device; when the second electrode acts as a cathode by the switching device, the anode is combined a first electrode, which functions as a diaphragmless electrolysis device for electrolyzing a chlorine-containing electrolyte solution in the first electrolytic cell to prepare alkaline electrolyzed water: when the third electrode acts as a cathode by the switching device At the same time, the first electrode of the anode is combined to electrolyze the alkaline φ electrolyzed water in the second electrolytic cell, and the pH of the alkaline electrolyzed water is adjusted to a range of 5.5 to 6.5, thereby producing a high concentration of hypochlorite. Acid sterilized water. 19. The manufacturing apparatus of claim 18, wherein the chlorine-containing electrolyte comprises an alkali metal chloride, an alkaline earth metal chloride or a chlorine-containing salt. 20. The manufacturing apparatus of claim 18, wherein, in the case where the solute of the chlorine-containing electrolyte solution is sodium chloride, the chlorine-containing electrolyte solution comprises supersaturated, saturated or unsaturated saline, seawater, brine or physiological Saline solution. Φ 21. A manufacturing apparatus for high-concentration hypochlorite sterilized water, comprising a four-pole diaphragm electrolysis device including a first electrolytic cell separated by a diaphragm and a second electrolytic device, and a switching device In the first electrolytic cell, a first electrode and a second electrode are disposed, and the second electrode and the fourth electrode are disposed in the second electrolytic cell, and each of the first, second, third and fourth electrodes can be borrowed Switching to an anode or a cathode by the switching device; wherein one of the first electrode and the second electrode acts as an anode by the switching device, and the other of the first electrode and the second electrode acts [S1 -14- 201102457 When the cathode is formed, the first electrolytic cell acts as a diaphragmless electrolysis device for electrolyzing the chlorine-containing electrolyte solution in the first electrolytic cell to prepare alkaline electrolyzed water; The three electrodes and/or the fourth electrode act as a cathode, and the first electrode and/or the second electrode act as an anode, and the alkaline electrolyzed water in the second electrolytic cell is electrolyzed, and the alkaline electrolyzed water is pH値 is adjusted in the range of 5_5~6.5 to produce high concentration of hypochlorous acid. Water. 22. The manufacturing apparatus of claim 21, wherein the chlorine-containing electrolyte comprises an alkali metal chloride, an alkaline earth metal chloride or a chlorine-containing salt. 23. The manufacturing apparatus according to claim 21, wherein in the case where the solute of the chlorine-containing electrolyte solution is sodium chloride, the chlorine-containing electrolyte solution comprises supersaturated, saturated or unsaturated saline, seawater, brine or physiological Saline solution. 24. A high concentration hypochlorite sterilized water manufacturing apparatus comprising: more than one diaphragmless electrolysis apparatus and an ion exchanger, wherein the diaphragmless electrolysis apparatus is provided with an anode and a cathode for electrolyzing a chlorine-containing electrolyte solution In order to prepare alkaline electrolyzed water, the ion exchanger contains a cation exchange resin, and the pH of the electrolyzed electrolyzed water is adjusted to 5.5 by directing the electrophoretic electrolyzed water through the ion exchanger. Scope of 6.5, in order to produce high concentration of hypochloric acid sterilized water. 2 5. The manufacturing apparatus of claim 24, wherein the chlorine-containing electrolyte comprises an alkali metal chloride, an alkaline earth metal chloride or a chlorine-containing salt. 26. A manufacturing apparatus according to claim 24 of the patent application scope. Wherein the solute of the chlorine-containing 18 solution f S3 -15- 201102457 is sodium chloride, the chlorine-containing electrolyte solution comprises supersaturated, saturated or unsaturated saline, sea water, brine or physiological saline. -16- [S]