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Process for producing sterile water containing hypochlorous acid or chlorous acid as its main component and apparatus therefor

A sterilizing water and chlorous acid technology, applied in the direction of sterilization/microdynamic water/sewage treatment, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problem of maintaining a certain amount of non-sterilizable water, pH and concentration maintenance wait for the question

Inactive Publication Date: 2008-02-13
VEETA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is impossible to maintain a constant production amount of sterilized water in the sterilized water production device, which is why it is difficult to maintain a constant pH and concentration.

Method used

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  • Process for producing sterile water containing hypochlorous acid or chlorous acid as its main component and apparatus therefor
  • Process for producing sterile water containing hypochlorous acid or chlorous acid as its main component and apparatus therefor
  • Process for producing sterile water containing hypochlorous acid or chlorous acid as its main component and apparatus therefor

Examples

Experimental program
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Effect test

no. 1 Embodiment

[0043] The first embodiment (Fig. 1, Fig. 2):

[0044] Fig. 1 shows a sterilizing water generating device of the first embodiment, and Fig. 2 is a schematic diagram of the structure of the device. Reference numeral 1 is a raw water supply pipe, such as tap water, well water, and sea water as raw water, and a check valve 2 , an electric switch valve 3 , a pump 4 , and a flow meter 5 are installed in the raw water supply pipe 1 . In addition, when using raw water that is pressure-fed, such as tap water, the pump 4 for pressure-feeding the raw water can also be omitted. Reference symbol 7 is a raw material tank for storing sodium hypochlorite aqueous solution, and 8 is a pump. The sodium hypochlorite aqueous solution in the raw material tank 7 is sent to the adding part 10 through the flow path switching valve 9 to be mixed with raw water. An aqueous solution of sodium hypochlorite diluted to a desired concentration by mixing with raw water is supplied to an upper space 14 of ...

no. 2 Embodiment

[0072] The second embodiment (Fig. 3)

[0073] The second embodiment shows an example of mixing an inorganic acid such as hydrochloric acid or sulfuric acid or an organic acid such as acetic acid or lactic acid (typically hydrochloric acid diluted with water) other than carbonic acid. Specifically, prepare the additional raw material tank 50 that acid such as dilute hydrochloric acid is housed, use the pump 51 of this addition to send the acid of this added raw material tank 50 into the raw material supply pipe 12 or the raw water supply pipe 1 in the addition part 52 sodium hypochlorite aqueous solution By mixing, the pH adjustment before supplying the sodium hypochlorite aqueous solution to the pressure vessel 13 is performed in this way.

[0074] Utilize the stage before the final pH adjustment of carbon dioxide gas in the pressure vessel 13 to carry out this pH adjustment. It can be to adjust the pH of the sodium hypochlorite aqueous solution to, for example, slightly al...

no. 3 Embodiment

[0077] The 3rd embodiment (Fig. 4):

[0078] The third embodiment is a modified example of the second embodiment described above. In the above-mentioned 2nd embodiment, the addition part 10 that adds sodium hypochlorite aqueous solution is arranged in series with the additional addition part 52 that adds acid, but also can be shown in this 3rd embodiment, add part 10 and the addition part 52 of addition Parallel configuration (Figure 4). That is, an aqueous sodium hypochlorite solution and dilute hydrochloric acid may be added to raw water, and then mixed to perform auxiliary adjustment of the pH of the aqueous sodium hypochlorite solution, and the aqueous sodium hypochlorite solution after the auxiliary pH adjustment may be supplied to the pressure vessel 13 .

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Abstract

Carbon dioxide gas is drawn out from carbon dioxide storing steel cylinder (15), decompressed by means of decompression valves (18,19) and fed into pressure vessel (13). A desirable-concentration aqueous solution of sodium hypochlorite is fed through raw material supply pipe (12) into the pressure vessel (13). The raw material supply pipe (12) is connected via distribution valve (102) to first branch pipe (100) and second branch pipe (101). The aqueous solution of sodium hypochlorite passing through the raw material supply pipe (12) is partly fed through the first branch pipe (100) and sprayed into a vapor phase region of the pressure vessel (13). The rest thereof is fed through the second branch pipe (101) into a liquid phase region of the pressure vessel (13). The pressure vessel (13) is provided with water level maintaining means (25-29) so that the water level is maintained within given range. The sterile water produced in the pressure vessel (13) is drawn out through discharge pipe (31) having aperture diaphragm (42). The pH value of the sterile water is detected by means of a pH sensor, and the distribution valve (102) is controlled so that the detected pH agrees with the desired pH.

Description

technical field [0001] The invention relates to a method and device for generating sterilizing water with hypochlorous acid or chlorous acid as the main component Background technique [0002] As we all know, the sterilizing water with hypochlorous acid or chlorous acid as the main component is harmless to the human body and exerts excellent bactericidal effect. For example, dilute sodium hypochlorite with water, and adjust the pH of the sodium hypochlorite aqueous solution when the concentration of free chlorine acid is adjusted to about 200 ppm to be about 8.6, and the sodium hypochlorite aqueous solution contains about 10% hypochlorous acid. The content ratio of hypochlorous acid depends on pH, and it is known that hypochlorous acid is approximately 100% in a weakly acidic range of pH=approximately 5. [0003] The following methods are known for producing sterilizing water containing hypochlorous acid or chlorous acid as the main component. The first method is a method o...

Claims

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Application Information

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IPC IPC(8): C02F1/50B01F1/00C02F1/46C02F1/76
Inventor 岡崎龍夫太田好纪寺西洋
Owner VEETA
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