JPH11244361A - Method for continuously manufacturing sterilized water for dispersion and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent scattering of sterilized water to other facilities and prevent occurrence of abnormality such as lack of surfactant by spreading cream-like bubbles formed in a manner that air is blown before a spreading pipe of mixed solution and fine bubbles of specific times the volume of solution are mixed to control fluidity. SOLUTION: Hypochlorous acid of a volume necessary for sterilizing a thin to be spread and a surfactant for stabilizing bubbles are mixed to water. Air is blown into a mixed solution therefrom before a spreading pipe of the mixed solution to form fine bubbles in the solution. At this time, air, by volume, about 0.1 to 20 times the solution is added to mix to form the cream-like bubbles. Thereby, the apparent volume is increased, and a target surface is wet in sterilized water to prevent scattering to other facilities. For example, even on a gradient surface to be sterilized, the cream-like bubbles using the surfactant keep attaching to the target surface and improve sterilizing efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for continuously producing sterilized water for spraying by adding gas to a mixed solution of hypochlorous acid and a surfactant. This is related to countermeasures against secondary pollution caused by sterilization from floors and counters in kitchen facilities such as employee cafeterias and general cafeterias.

[0002]

2. Description of the Related Art Conventionally, in a disinfection treatment in such a place, a mixed solution containing hypochlorous acid and a surfactant is sprayed on a floor or kitchen equipment, and cleaned with a deck brush or a rubber spatula. Was.

[0003]

When a solution containing hypochlorous acid and a surfactant is sprayed on a floor or kitchen equipment, a gradient is provided to improve drainage of the floor. It turned out that the solution flowed quickly and did not stay in the place to be cleaned for a long time. As a countermeasure, when the solution was sprayed in a fine mist, it was found that the mist solution scattered not only to the cleaning staff but also to other foods and equipment in the kitchen equipment, making it unusable. Was. Another problem is that it is difficult to determine whether the currently used solution contains a surfactant or the like during the disinfection operation. Difficult to find,
It was found to affect the eradication action.

[0004]

SUMMARY OF THE INVENTION Surfactants are used to prevent the oxidizing action of bacteria by hypochlorous acid from being hindered by hydrophobic dirt such as oils and fats. At the same time, it was also found that in the concentration range when used in such applications, there are not a few that show an appropriate bubble force.

[0005] When air is blown in before the mixed solution spray tube to mix fine bubbles, a creamy foam is formed, and when the fluidity is moderately suppressed, the volume is increased and the volume is increased. It was found that the target surface was effectively wetted with disinfecting water, and at the same time it was found that when no surfactant was included, the air bubbles were immediately broken and the cleaning worker easily noticed the abnormality.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A test facility as shown in FIG. 1 was prepared in order to confirm the effect on the spraying surface in the case of sterilized water containing foam and no foam. This device is used to test how the sanitized water containing air bubbles and the sanitized water that does not contain the slightly sterilized surface to be sterilized, and simulates a general kitchen floor. Have been created. The material was created using SUS304 generally used for kitchen equipment. A
Between -B, there is a downward slope from A to B, so that the slope is about 1.5 with respect to the horizontal. In order to measure the wet portion, the sprayed surface was thoroughly dried, and the surface was wiped with absorbent cotton impregnated with salad oil, and then corn starch was sprinkled thinly and evenly so as to approach the actual kitchen site. When the corn starch is sprinkled thinly in this way, the corn starch is removed from the area where the water has been applied to the surface.

For the measurement of the wet area, a transparent sheet with a cross section is placed from above and a cell without corn starch is counted, and the wet area is determined. If necessary, it is also possible to measure up to half or quarter of the grid. The lower part of B is a gutter, and the washing water coming down from the line of B is collected by the gutter and collected in the beaker of C. Put the beaker on the weighing scale and measure the weight after spraying every hour with the weight of the empty beaker subtracted, so that the sterilized water in the actual kitchen will flow to the drain. Speed can be measured.

In the examples, 400 cc of the test solution shown in Table 1 was poured into a funnel (the nozzle diameter of the funnel was 20 mm, the height from the point A was 50 mm) placed at a point A at a stretch, and was sprayed at the point A. The amount of test liquid stored in the beaker
The area of the wet part (the area of the part where the corn starch disappeared) was measured. Regarding the method of mixing air into the test liquids of 4, 5, and 6, it is necessary to make the spray amount accurate to compare with other samples and to measure the volume after air mixing. Manufactured by.

For the bubble mixture, a commercially available cooking mixer was used, and the mixer was operated for about 30 seconds. With the test solution No. 6, the apparent volume was around 900 cc after the mixer was stopped. However, with respect to the test liquids of 4.5, since the bubbles disappeared after the mixer was stopped, the test liquid was substantially the same as the test of 1.2. Table 2 shows a comparison with and without air.

FIG. 2 is a graph of Table-2. Sample 1 to Sample 6 correspond to the sample numbers in Table 1. The item after 5 seconds to 2 minutes on the horizontal axis is the value obtained by dividing the sterilized water accumulated in the beaker C by the total amount of the sterilized water dropped to the point A in FIG. The wet area is the ratio of the wet area to the total test area in FIG. The vertical axis is 0-100
Express ratio up to%.

As the surfactant, polyoxyethylene alkylphenol ether was used. As shown in Table 3, linear alkylbenzenesulfonic acid, a mixed solution of sodium lauryl sulfate and lauryl alcohol, and the like were used.
When a combination having a foaming power (rosmiles method) of 100 or more was tested, almost the same results were obtained. In the case of such a spraying form, if the apparent volume is large and the specific gravity is light, the area spreading around the point A becomes large, in combination with the improvement of the wettability to the test surface by the surfactant, and the large Since the wet surface falls toward the side B as it is, it was found that the wet area increased. At the same time, it was found that bubbles remained and it was easy to determine that the surfactant was contained in an appropriate amount.

[0012] Since the test liquid of 1, 2, 4, and 5 flows down like a thin thread, the area for wetting the surface is particularly small, and the location where the corn soot remains even when water drops pass is considerable. Were present.

In the test solution of No. 3, the wet surface spreads downward from the portion where water was applied, indicating that the action of the surfactant is effective. Not enough, the wetted surface remained about half of the 6 test solutions. With such an effect, even if there is some inclination, the disinfecting water can easily spread over a wide range from the spraying surface and can be prevented from immediately flowing down, so even if the consumption of chemicals and water is suppressed to less than half. It turned out that a sufficient sterilization effect can be expected. The test of making and spraying in a batch system as described above is possible at the laboratory level, but it is difficult to pump the foamed aqueous solution with a pump when trying to spray it with piping at an actual work site. Since the fluidity is poor, the pipe diameter becomes large. Foam breaks when compression and decompression are repeated. From the viewpoint of practical use, it was also found that it is important to make the material in a pipe as in the present invention and spray it as it is.

[0014]

In the present invention, as the hypochlorous acid, a commercially available sodium hypochlorite solution is generally used, but the electrolyzed water generated by electrolyzing a saline solution or the like is collected on the positive electrode. The same effect can be expected even if the above-described treatment is applied to a product obtained by adding a surfactant to hypochlorous acid-containing water or the like.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

Embodiment 1 FIG. 3 is a flow sheet according to an embodiment of the present invention. Tap water is adjusted to a constant pressure via a pressure reducing valve (4). When the water stop valve (6) is opened, the flow switch (18) is turned on, and the hypochlorous acid pump (10) and the surfactant pump (12) are operated through the control panel, so that a specified amount of the chemical solution is piped. To supply. The aqueous solution mixed with the chemical solution passes through the water flow pump unit, and at this time, air is sucked from an air hole formed in an outer peripheral portion of the water flow pump and mixed into the aqueous solution. The aqueous solution mixed with air becomes disinfecting water containing homogenous air bubbles by the mixer (8) and is sprayed on the object by the spray pipe (9).

FIG. 4 is a structural view of the water pump and the mixer. The internal structure is made up of four parts, and in the drawing, the parts are described in a state where they are separated for easy understanding, but the parts are brought into close contact during operation. Since hypochlorous acid generally has a property of corroding metallic materials, these parts and holders are made of a material having a sufficient resistance to hypochlorous acid such as vinyl chloride. The holder has an air hole that is aligned with the air intake groove of the water pump.The water flow of the aqueous solution that flows in from the direction of the large arrow becomes a high-speed water flow in the water pump. Is used to mix air into the aqueous solution. The ratio of the mixing ratio of air to the aqueous solution is determined in a certain range by the ratio of the diameter of the air nozzle obliquely penetrating the constricted portion of the water flow pump to the opening area of the constricted portion of the water flow pump. However, if the air entrapment rate is excessively increased, the pressure of the spacer portion increases, and as a result, the water flow flowing through the constricted portion is slowed, so that the air entrapment rate is limited. The spacer portion is provided to maintain a sufficient flow velocity at the constricted portion of the water flow pump. In this state, the air bubbles are dispersed to some extent evenly, but in order to make the air bubbles finer, by increasing the flow velocity again at the mixer throat section and causing it to hit the front of the mixer nozzle, suddenly changing the flow direction After the turbulent state, the system is divided into six small openings and guided to the spraying opening. In addition, although the thing which connected such a water-flow pump and the mixer was created on the structure of a system, the same effect can be expected even if a commercially available water-flow pump and a resin-made static mixer are combined.

[0018]

Embodiment 2 FIG. 5 is a flow sheet according to an embodiment of the present invention. Tap water is guided to the mixer (8) via the pressure reducing valve (4), via the flow transmitter (19), and via the outlet side hose (5). The controller (15) operates the hypochlorous acid pump (10) and the surfactant pump (12) based on the signal of the flow transmitter, and supplies each chemical solution to the mixer inlet so as to have a predetermined concentration. I do. As the compressor (22), a commercially available air compressor is used, and always maintains a pressure of 0.5 MPa. The controller adjusts the opening of the proportional motor valve based on the signal from the flow transmitter, and supplies air corresponding to the current water amount to the mixer using the air pipe (28). The four fluids are mixed immediately before the mixer, and are further pulverized inside the mixer, so that sterilizing water for spraying containing predetermined air is continuously supplied from the spray pipe (9). Note that the same effect can be expected when the gas supplied by the compressor or the cylinder is not only air but also a gas containing nitrogen gas, carbon dioxide gas, ozone, or the like.

[0019]

According to the present invention, as described above, a gaseous mixture is added to a mixture of hypochlorous acid and a surfactant, and a disinfecting solution for spraying is bubbled in a state containing fine bubbles, thereby making it possible for hospitals, food service centers, and employees. Since it is stored on a cleaning surface such as a floor of a kitchen facility such as a cafeteria or a cooking table, an effect of disinfecting and sterilizing is improved, and the effect of preventing secondary contamination by bacteria can be sufficiently achieved.

[Brief description of the drawings]

FIG. 1 is an illustration of an embodiment created by imitating a kitchen floor.

FIG. 2 is a measurement graph diagram

FIG. 3 is a diagram showing an embodiment of claim 2;

FIG. 4 is a structural diagram of a water flow pump and a mixer.

FIG. 5 is a diagram showing an embodiment of claim 3;

[Explanation of symbols]

 (1) Tap water piping (2) Tap water main valve (3) Inlet hose (4) Pressure reducing valve (5) Outlet hose (6) Outlet valve (7) Water flow pump (8) ... mixer (9) ... spray tube (10) ... hypochlorous acid pump (11) ... hypochlorous acid solution tank (12) ... surfactant pump (13) ... surfactant tank (14) ... chemical liquid cracking valve (15) Controller (16) Power outlet (17) Pump power supply (18) Water flow switch (19) Flow transmitter (20) Flow transmitter signal line (21) Pump proportional signal (22) ) Compressor (23) Compressor filter (24) Proportional motor valve (25) Proportional motor valve signal line (26) Hypochlorous acid injection pipe (27) Surfactant injection pipe (28) Air piping (29) … Check valve

Claims (3)

[Claims] When disinfecting water by spraying disinfecting water on floors, kitchen equipment, tableware, etc., which requires disinfection, the water contains an amount of hypochlorous acid necessary for disinfecting the object to be sprayed. By mixing a surfactant capable of improving the stability of air bubbles, a gas of about 0.1 to 20 times the volume of the aqueous solution is continuously mixed with the aqueous solution in a pipe, and mixing is performed. A method for continuously producing sterilized water for spraying, characterized in that foaming is carried out in a state containing water, and sprayed on a target object in a state where the apparent volume is increased from the original aqueous solution. 2. A hypochlorite solution pump for discharging a hypochlorous acid solution in a fixed amount. Surfactant pump that discharges a constant amount of surfactant. A water flow pump that takes in external air by the action of a water flow. A mixer that stirs the air mixed solution and generates fine bubbles. After mixing the hypochlorous acid solution and the surfactant in the water supplied from the pipe, air is taken in from the water pump using the water flow of the aqueous solution, and the mixed air is mixed by the mixer. A continuous production apparatus for disinfecting water for spraying that continuously mixes and stirs to produce sterilizing water for spraying containing fine air bubbles. 3. A hypochlorite solution pump for discharging a hypochlorite solution in a fixed amount. Surfactant pump that discharges a constant amount of surfactant. A compressor for compressing gas or a cylinder filled with compressed gas. A flow rate adjusting mechanism for adjusting the flow rate of the compressed gas from the compressor. A mixer that stirs the air mixed solution and generates fine bubbles. After mixing the hypochlorous acid solution and the surfactant in the water supplied from the pipe, the flow rate of the compressed gas created by the compressor or the compressed gas stored in the cylinder is adjusted by the flow rate adjusting mechanism. A disinfecting water continuous production apparatus for spraying, which is supplied to a mixer inlet, mixes and stirs the mixed air by the mixer, and continuously produces disinfecting water for spraying containing fine air bubbles.