A kind of slightly acidic hypochlorous acid generator and generation method

Abstract

The present invention specifically relates to a slightly acidic hypochlorous acid generator and a generating method, the generator comprises a first electrolytic chamber, a second electrolytic chamber and a control circuit; the first electrolytic chamber is divided into a residual storage chamber and a liquid retention chamber; the residual storage chamber is provided with an exhaust pipe to communicate with the atmosphere; a drain pipe and a pressure reducing pipe are arranged in parallel in the liquid retention chamber; the upper end opening area of ​​the drain pipe is larger than the upper end opening area of ​​the pressure reducing pipe; the lowest end of the drain pipe is lower than the lowest end of the pressure reducing pipe; a diaphragm electrolysis device is arranged at the position where the bottom of the first electrolytic chamber and the second electrolytic chamber are connected; the upper surface of the second electrolytic chamber is at the same height as the upper surface of the residual storage chamber; the upper surface of the second electrolytic chamber is provided with a water inlet and outlet adapted to the container opening; the water inlet and outlet include two through holes of different sizes, namely a large through hole and a small through hole, and the control circuit is connected to the diaphragm electrolysis device. The method has a simple structure and is easy to implement.

Description

Technical Field

[0001] The invention relates to the field of chemical production, and in particular to a slightly acidic hypochlorous acid generator and a generating method. Background Art

[0002] Slightly acidic hypochlorous acid water is also called slightly acidic electrolyzed water (SAEW) and slightly acidic oxidizing potential water. Its pH value is 5.0-6.5, and its bactericidal effect is high, which is dozens of times that of sodium hypochlorite of the same concentration. It only exists in solution. Concentrated solution is yellow, dilute solution is colorless, high concentration has a very pungent chlorine-like smell, and it is extremely unstable. It is a very weak acid, weaker than carbonic acid and equivalent to hydrosulfuric acid. Hypochlorous acid disinfectant is an emerging disinfection product and has been demonstrated to be one of the safe, effective and environmentally friendly disinfection and sterilization products. In the food field, compared with the currently commonly used disinfectants such as sodium hypochlorite or alcohol, it can better ensure safety and has the characteristics of reducing costs and reducing environmental load.

[0003] At present, most of the products generated by hypochlorous acid generators on the market are sodium hypochlorite, which is alkaline, has poor bactericidal effect and has toxic side effects. Some hypochlorous acid generators generate products called hypochlorous acid. Usually, the pH value of the generated solution is about 3, which will inhibit the reaction of chlorine and water, thereby reducing the amount of hypochlorous acid generated. In addition, the pH value is too low, which will cause certain corrosion to metals and irritation to the skin. The bactericidal effect of this hypochlorous acid solution is also relatively poor. Experimental data have clearly shown that when the pH value of hypochlorous acid solution is 5-6.5, the proportion of hypochlorous acid is more than 90%, and the bactericidal effect of sodium hypochlorite solution is the best at this time. At present, there are three main production methods for hypochlorous acid generators: one is electrolysis of dilute hydrochloric acid, one is a mixture of weak acid and sodium hypochlorite, and the other is electrolysis of saturated brine. Dilute hydrochloric acid and sodium hypochlorite are highly corrosive and can easily cause harm to operators and equipment; while the production of hypochlorous acid by electrolysis of saturated brine is relatively safe and will not pose any threat to people, equipment and the environment.

[0004] Since hypochlorous acid solution is very unstable, its properties change greatly after a short period of time, resulting in unstable sterilization effect. Therefore, it is better to use slightly acidic hypochlorous acid solution as a sterilant within a certain period of time after it is generated. Therefore, a slightly acidic hypochlorous acid generator and generation method are needed to conveniently and safely generate high-concentration HCIO solution. Summary of the invention

[0005] 1. Technical problems to be solved:

[0006] In view of the above technical problems, the present invention provides a slightly acidic hypochlorous acid generator and a generation method. In the method, diaphragm electrolysis of salt water is used to generate slightly acidic hypochlorous acid, and the generated slightly acidic hypochlorous acid is collected by a container.

[0007] 2. Technical solution:

[0008] A slightly acidic hypochlorous acid generator, characterized in that it comprises a shell, a generator body installed inside the shell, a container and a control circuit; the generator body comprises a first electrolytic chamber and a second electrolytic chamber arranged in parallel and connected at the bottom; the first electrolytic chamber is divided into two upper and lower inner chambers, wherein the upper inner chamber is a residual storage chamber and the lower inner chamber is a liquid retention chamber; an exhaust pipe is arranged at the upper end of the residual storage chamber to communicate with the atmosphere; the bottom end of the exhaust pipe is located in the inner chamber of the residual storage chamber; a drain pipe and a pressure reducing pipe are arranged in parallel on the isolation surface between the residual storage chamber and the liquid retention chamber and in the liquid retention chamber, so that the residual storage chamber and the liquid retention chamber are connected. The gas in the body retention cavity is circulated; the upper end opening area of ​​the drain pipe is larger than the upper end opening area of ​​the step-down pipe; the lowest end of the drain pipe is lower than the lowest end of the step-down pipe; a diaphragm electrolysis device is arranged at the position where the bottom of the first electrolysis chamber is connected to the bottom of the second electrolysis chamber; the lowest end of the step-down pipe is located at the upper end of the diaphragm electrolysis device or is flush with the diaphragm electrolysis device; the diaphragm electrolysis device includes two pole pieces and a diaphragm located between the two pole pieces; one of the pole pieces is installed on the first electrolysis chamber side, and the other pole piece is installed on the second electrolysis chamber side; the upper surface of the second electrolysis chamber is at the same height as the upper surface of the storage chamber.

[0009] The upper surface of the second electrolytic chamber is provided with a water inlet and outlet adapted to the container opening; the water inlet and outlet include two through holes of different sizes, namely a large through hole and a small through hole.

[0010] The control circuit comprises an H-type bidirectional current circuit composed of two pnp transistors and two npn transistors; the output ends of the H-type bidirectional current circuit are respectively connected to two pole pieces.

[0011] Furthermore, the exhaust pipe is located relative to the drainage pipe and the pressure-reducing pipe arranged in parallel, and the exhaust pipe is close to the second electrolytic chamber.

[0012] Furthermore, the diaphragm in the diaphragm electrolysis device is fixed by two diaphragm brackets with a grid structure; and a penetration hole is left between the diaphragm bracket and the side wall of the generator.

[0013] Furthermore, it also includes a circuit board on which the control circuit is installed; the circuit board is installed between the shell and the generator body; the circuit board also includes a socket for connecting to a power source.

[0014] A method for generating slightly acidic hypochlorous acid comprises the following steps:

[0015] Step 1: Place a preset volume of salt water of a preset concentration in a container, then fill it with tap water, purified water or mineral water, and invert the generator to connect the water inlet and outlet of the slightly acidic hypochlorous acid generator to the container.

[0016] Step 2: Place the connected generator upright, connect the power supply and turn on the circuit switch of the controller. At this time, the electrode on the second electrolytic chamber side is positively charged.

[0017] Step 3: All the salt water enters the first and second electrolytic chambers, and the liquid level is higher than the diaphragm electrolysis device; at this time, a positive electrolysis reaction is carried out in the generator, that is, the electrolysis reaction in the first electrolytic chamber is 2H2O - 2e → 2 OH - +H2↑, the reaction of the second electrolytic chamber 2CL - + 2e + H2O → HCL + HCLO. In this process, the plates of the first electrolytic chamber produce hydrogen, which drives the convection of the liquid, thereby making the OH in the first electrolytic chamber - Through the permeate port to the second electrolysis chamber, neutralize part of H + After a predetermined time, the control circuit realizes the current reversal. At this time, the electrode in the second electrolytic chamber is negatively charged, and the reverse electrolysis reaction is carried out, that is, the reaction in the first electrolytic chamber is 2CL - + 2e + H2O → HCL + HCLO, 2 H2O in the second electrolytic chamber - 2e → 2 OH - + H2↑, during the reverse electrolysis process, a neutralization reaction is simultaneously carried out in the second electrolysis chamber, and the neutralization reaction is: OH- + H+ →H2O, thereby achieving the purpose of neutralizing the hydrochloric acid.

[0018] Step 4: After a preset time, the generator is inverted and the generated liquid, i.e., slightly acidic hypochlorous acid, is collected in a container through the inlet and outlet.

[0019] Step 5: After the collection is completed, place the generator upright for about 10 seconds, then reverse the generator. The sodium hydroxide generated in the electrolysis reaction will flow out from the inlet and outlet.

[0020] 3. Beneficial effects:

[0021] (1) The present invention adopts a diaphragm method to electrolyze salt water to produce slightly acidic hypochlorous acid, which is highly safe and can solve the problem of salt crystallization in the traditional electrolysis of saturated salt water.

[0022] (2) In the process of electrolyzing salt water, the present invention controls the positive and negative charges of the electrode to control the electrolytic chamber of the generator to first perform forward electrolysis and then reverse electrolysis. At the same time, the hydrochloric acid generated in the solution is neutralized through a neutralization reaction, which can effectively control the pH value of the solution within the range of 5-6.5, thereby ensuring the bactericidal effect of the generated hypochlorous acid.

[0023] (3) In the present device, a pressure reducing pipe is used in the first electrolysis chamber to assist drainage. When liquid is added, the gas in the liquid retention chamber is separated from the atmosphere as the liquid level rises. The liquid levels of the drainage pipe and the pressure reducing pipe are level, and the liquid level in the liquid retention chamber is relatively low. At this time, the gas in the liquid retention chamber cannot be discharged and is retained in the space above the liquid level in the liquid retention chamber. In addition, the hydrogen generated during electrolysis makes the gas in the liquid retention chamber more and more, the gas pressure in the chamber increases, and the liquid level moves downward. When the liquid level is lower than the bottom of the pressure reducing pipe, the excess gas can be discharged through the pressure reducing pipe. After the generator is inverted after the electrolysis of salt water, the sodium hydroxide generated in the first electrolysis chamber is inverted in the first electrolysis chamber, and a part of the sodium hydroxide enters the residual storage chamber through the drainage pipe or the pressure reducing pipe. The exhaust pipe structure provided in the residual storage chamber can prevent the generated sodium hydroxide from leaking. After the hypochlorous acid is taken out, the generator is placed upright. Since the upper end area of ​​the drainage pipe is larger than the area of ​​the pressure reducing pipe, the sodium hydroxide solution will automatically flow down from the residual storage chamber through the drainage pipe, so that the remaining liquid is finally poured out from the water outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an external view of the connection between the container and the generator when the generator is placed upright in the present invention;

[0025] Figure 2 It is a front cross-sectional view of the generator body in the present invention;

[0026] Figure 3 is a side sectional view of the generator body in the present invention;

[0027] Figure 4 This is a liquid level diagram when the solution is just poured in the present invention;

[0028] Figure 5 This is a schematic diagram of the liquid surface when collecting slightly acidic hypochlorous acid in the present invention;

[0029] Figure 6 A schematic diagram of a support for a diaphragm of the present invention;

[0030] Figure 7 is a top view of the generator in the present invention;

[0031] Figure 8 It is the control circuit diagram of the present invention. DETAILED DESCRIPTION

[0032] As attached Figures 1 to 3 With attached Figure 7As shown, a slightly acidic hypochlorous acid generator is characterized in that it includes a shell 1, a generator body 2 installed inside the shell, a container 3 and a control circuit; the generator body includes two first electrolytic chambers 4 and second electrolytic chambers 5 arranged in parallel and connected at the bottom; the first electrolytic chamber is divided into two upper and lower inner chambers, wherein the upper inner chamber is a residual storage chamber 41 and the lower inner chamber is a liquid retention chamber 42; an exhaust pipe 43 is arranged at the upper end of the residual storage chamber to communicate with the atmosphere; the bottom end of the exhaust pipe is located in the inner cavity of the residual storage chamber; a drain pipe 44 and a pressure reducing pipe are arranged in parallel on the isolation surface between the residual storage chamber and the liquid retention chamber and in the liquid retention chamber 45, so that the gas in the residual chamber and the liquid retention chamber can circulate; the upper end opening area of ​​the drain pipe is larger than the upper end opening area of ​​the pressure reducing pipe; the lowest end of the drain pipe is lower than the lowest end of the pressure reducing pipe; a diaphragm electrolysis device 6 is arranged at the position where the bottom of the first electrolysis chamber is connected to the bottom of the second electrolysis chamber; the lowest end of the pressure reducing pipe is located at the upper end of the diaphragm electrolysis device or is flush with the diaphragm electrolysis device; the diaphragm electrolysis device includes two pole pieces and a diaphragm located between the two pole pieces; one of the pole pieces is installed on the first electrolysis chamber side, and the other pole piece is installed on the second electrolysis chamber side; the upper surface of the second electrolysis chamber is at the same height as the upper surface of the residual chamber.

[0033] The upper surface of the second electrolytic chamber is provided with a water inlet and outlet 7 adapted to the container opening; the water inlet and outlet include two through holes of different sizes, namely a large through hole 71 and a small through hole 72 .

[0034] As attached Figure 8 As shown, the control circuit includes an H-type bidirectional current circuit composed of 2 pnp transistors and 2 npn transistors; the output ends of the H-type bidirectional current circuit are respectively connected to two pole pieces.

[0035] Furthermore, the exhaust pipe is located relative to the drainage pipe and the pressure-reducing pipe arranged in parallel, and the exhaust pipe is close to the second electrolytic chamber.

[0036] Furthermore, as attached Figure 6 As shown, the diaphragm in the diaphragm electrolysis device is fixed by two diaphragm brackets with a grid structure; a penetration hole is left between the diaphragm bracket and the side wall of the generator.

[0037] Furthermore, it also includes a circuit board on which the control circuit is installed; the circuit board is installed between the shell and the generator body; the circuit board also includes a socket for connecting to a power source.

[0038] In the device, a diaphragm is used to electrolyze salt water, and the diaphragm is used to separate the anode product from the cathode product.

[0039] The water inlet and outlet structure used in this device is as shown in the attached Figure 7The water inlet and outlet are divided into two large and small through holes, the purpose is to achieve separate inlet and outlet of water and gas through pressure difference, so as to achieve rapid pouring in and out of the liquid in the single-outlet container. And to achieve rapid vertical pouring of the liquid in the spray bottle into the second electrolytic chamber and rapid pouring of the liquid in the second electrolytic chamber into the container.

[0040] In the device, the residual storage chamber, the pressure reducing pipe and the drain pipe cooperate with each other, and during the forward and reverse rotation of the generator, the pressure of the gas in the liquid retention chamber is effectively adjusted, thereby realizing the collection of sodium hydroxide.

[0041] A method for generating slightly acidic hypochlorous acid comprises the following steps:

[0042] Step 1: Place a preset volume of 20% to 25% salt water in a container, and connect the slightly acidic hypochlorous acid generator to a power source.

[0043] Step 2: Invert the generator, install the container filled with salt water at the water inlet and outlet, then put the generator upright, turn on the circuit switch of the controller, and the electrode on the second electrolytic chamber side will be positively charged.

[0044] Step 3: As attached Figure 4 As shown, all the salt water enters the first electrolytic chamber and the second electrolytic chamber, and the liquid level is higher than the diaphragm electrolysis device; at this time, a positive electrolysis reaction is carried out in the generator, that is, the electrolysis reaction in the first electrolytic chamber is 2H2O -2e → 2 OH - + H2↑, reaction 2CL in the second electrolytic chamber - + 2e + H2O → HCL + HCLO. In this process, the plates of the first electrolytic chamber produce hydrogen, which drives the convection of the liquid, thereby making the OH in the first electrolytic chamber - Through the permeate port to the second electrolysis chamber, neutralize part of H + After a predetermined time, the control circuit realizes the current reversal. At this time, the electrode in the second electrolytic chamber is negatively charged, and the reverse electrolysis reaction is carried out, that is, the reaction in the first electrolytic chamber is 2CL - + 2e + H2O → HCL +HCLO, 2 H2O in the second electrolytic chamber - 2e → 2 OH - + H2↑, during the reverse electrolysis process, a neutralization reaction is simultaneously carried out in the second electrolysis chamber, and the neutralization reaction is: OH- + H+ →H2O, thereby achieving the purpose of neutralizing the hydrochloric acid.

[0045] Step 4: After the preset time, Figure 5 As shown, the generator is inverted, and the liquid generated, i.e., slightly acidic hypochlorous acid, is collected in a container through the inlet and outlet.

[0046] Step 5: After the collection is completed, place the generator upright for about 10 seconds, then reverse the generator. The sodium hydroxide generated in the electrolysis reaction will flow out from the inlet and outlet.

[0047] In the above steps, the charge of the electrode is changed by changing the current direction of the control circuit, thereby controlling the electrolytic reaction in the electrolytic chamber, and the pH value of the liquid can be effectively controlled by first performing forward electrolysis and then reverse electrolysis. The length of time for forward electrolysis depends on the volume of the generator, and is set according to the volume of the generator in actual products.

[0048] Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined by the claims of this application.

Claims

1. A slightly acidic hypochlorous acid generator, Features: The invention comprises a housing (1), a generator body (2) installed inside the housing (1), a container and a control circuit; the generator body (2) comprises a first electrolysis chamber (4) and a second electrolysis chamber (5) arranged in parallel and connected at the bottom; the first electrolysis chamber (4) is divided into two upper and lower inner chambers, wherein the upper inner chamber is a residual storage chamber (41) and the lower inner chamber is a liquid retention chamber (42); an exhaust pipe (43) is arranged at the upper end of the residual storage chamber (41) to communicate with the atmosphere; the bottom end of the exhaust pipe (43) is located in the inner chamber of the residual storage chamber (41); the isolation surface between the residual storage chamber (41) and the liquid retention chamber (42) is connected to the liquid retention chamber (42); ) are arranged in parallel with a drain pipe (44) and a pressure reducing pipe (45) to enable the gas in the residual storage chamber (41) and the liquid retention chamber (42) to circulate; the upper end opening area of ​​the drain pipe (44) is larger than the upper end opening area of ​​the pressure reducing pipe (45); the lowest end of the drain pipe (44) is lower than the lowest end of the pressure reducing pipe (45); a diaphragm electrolysis device (6) is arranged at a position where the bottom of the first electrolysis chamber (4) and the second electrolysis chamber (5) are connected; the lowest end of the pressure reducing pipe (45) is located at the upper end of the diaphragm electrolysis device (6) or is flush with the diaphragm electrolysis device (6); the diaphragm electrolysis device (6) comprises two pole pieces and a diaphragm located between the two pole pieces; One of the pole pieces is installed on the side of the first electrolytic chamber (4), and the other pole piece is installed on the side of the second electrolytic chamber (5); the upper surface of the second electrolytic chamber (5) is at the same height as the upper surface of the residual storage chamber (41); The upper surface of the second electrolytic chamber (5) is provided with a water inlet and outlet (7) adapted to the container opening; the water inlet and outlet (7) comprises two through holes of different sizes, namely a large through hole (71) and a small through hole (72); The control circuit comprises an H-type bidirectional current circuit composed of two pnp transistors and two npn transistors; the output ends of the H-type bidirectional current circuit are respectively connected to two pole pieces.

2. A slightly acidic hypochlorous acid generator according to claim 1, Features: The exhaust pipe (43) is located relative to the drainage pipe (44) and the pressure reducing pipe (45) arranged in parallel, and the exhaust pipe (43) is close to the second electrolytic chamber (5).

3. A slightly acidic hypochlorous acid generator according to claim 1, Features: The diaphragm in the diaphragm electrolysis device (6) is fixed by two diaphragm brackets with a grid structure; a permeable hole is left between the diaphragm bracket and the side wall of the generator.

4. A slightly acidic hypochlorous acid generator according to claim 1, Features: It also includes a circuit board on which a control circuit is installed; the circuit board is installed between the housing (1) and the generator body (2); the circuit board also includes a socket for connecting to a power source.

5. A method for producing slightly acidic hypochlorous acid, which is a method for producing slightly acidic hypochlorous acid based on a slightly acidic hypochlorous acid generator according to any one of claims 1 to 4, The following steps are involved: Step 1: Put a preset volume of salt water with a preset concentration into the container, then fill it with tap water, purified water or mineral water, and invert the generator to connect the water inlet and outlet of the slightly acidic hypochlorous acid generator to the container; Step 2: Place the connected generator upright, connect the power supply and turn on the circuit switch of the controller. At this time, the electrode on the second electrolytic chamber side is positively charged; Step 3: All the salt water enters the first electrolytic chamber and the second electrolytic chamber, and the liquid level is higher than the diaphragm electrolysis device; at this time, a positive electrolysis reaction is carried out in the generator, that is, the electrolysis reaction in the first electrolytic chamber is 2H 2 O - 2e → 2 OH - + H 2 ↑, reaction 2CL in the second electrolytic chamber - + 2e + H 2 O → HCL + HCLO. In this process, the plates of the first electrolytic chamber produce hydrogen, which drives the convection of the liquid, thereby making the OH in the first electrolytic chamber - Through the permeate port to the second electrolysis chamber, neutralize part of H + After a predetermined time, the control circuit realizes the current reversal. At this time, the electrode in the second electrolytic chamber is negatively charged, and the reverse electrolysis reaction is carried out, that is, the reaction in the first electrolytic chamber is 2CL - + 2e + H 2 O → HCL + HCLO, 2 H in the second electrolytic chamber 2 O - 2e → 2 OH - + H 2 ↑, during the reverse electrolysis process, a neutralization reaction is carried out in the second electrolytic chamber at the same time. The neutralization reaction is: OH- + H+ →H 2 O, thereby achieving the purpose of neutralizing hydrochloric acid; Step 4: After a preset time, the generator is inverted, and the generated liquid, i.e., slightly acidic hypochlorous acid, is collected in a container through the inlet and outlet; Step 5: After the collection is completed, place the generator upright for 10 seconds, then reverse the generator. The sodium hydroxide generated in the electrolysis reaction will flow out from the inlet and outlet.

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