Equipment for preparing hypochlorous acid based on ion exchange method

Abstract

The utility model discloses equipment for preparing hypochlorous acid based on an ion exchange method, which relates to the technical field of hypochlorous acid preparation equipment and comprises a water inlet part, and the liquid inlet end of the water inlet part is connected with an external water supply pipeline; the liquid inlet end of the liquid injection part is connected with the water inlet part; the liquid inlet end of the ion exchange part is connected with the liquid injection part, and the liquid outlet end of the ion exchange part is connected with the hypochlorous acid using terminal through an external liquid conveying pipeline; the pipe diameter of the use terminal is greater than or equal to that of the liquid injection part; the controller is electrically connected with electrical elements in the water inlet part and the liquid injection part; according to the device, high-concentration hypochlorous acid can be prepared, the liquid outlet amount is large, and the weakly acidic cation exchange inner core has a good pH buffering function, so that the potential safety hazard of chlorine overflow does not exist.

Description

Technical Field

[0001] This utility model belongs to the technical field of hypochlorous acid preparation equipment, specifically relating to an equipment for preparing hypochlorous acid based on ion exchange method. Background Technology

[0002] Hypochlorous acid, due to its highly effective sterilization and deodorization properties and its safety, has been widely used in environmental disinfection, food processing, medicine, and many other fields. Currently, the main methods for preparing hypochlorous acid are electrolysis and synthesis. Electrolysis is a widely used and mature technology, while synthesis requires extremely high levels of precision in mixing and injection techniques. Therefore, electrolysis remains the mainstream method for preparing hypochlorous acid. However, both electrolysis and synthesis methods, due to their underlying principles, significantly limit the widespread adoption and development of economical hypochlorous acid preparation equipment.

[0003] First, the basic principle of hypochlorous acid preparation by electrolysis is an electrochemical reaction, producing hypochlorous acid by electrolyzing salt or hydrochloric acid. According to Faraday's first law of electrolysis, the amount of electrolyte produced is directly proportional to the current intensity and the electrolysis time. Economical electrolytic hypochlorous acid preparation equipment with a power of tens of watts uses a low current and a short electrolyte flow time through the electrodes. Therefore, such equipment not only produces low-concentration hypochlorous acid (tens of ppm) but also has a very small output (less than 300 liters / hour), which cannot meet the market demand for high-concentration hypochlorous acid, such as in waste treatment and bathroom disinfection. Furthermore, the electrodes used in economical equipment are generally inexpensive, requiring regular maintenance and upkeep during operation, resulting in high maintenance costs.

[0004] Secondly, the basic principle of the synthetic method for preparing hypochlorous acid is an acidification reaction. It uses acidic substances such as sodium hypochlorite and hydrochloric acid (or organic acids such as citric acid and acetic acid) as raw materials. Sodium hypochlorite is a strong base-weak acid salt. By reacting with acidic substances like hydrochloric acid to adjust the pH of the sodium hypochlorite solution, the proportion of available chlorine in the solution is increased, thus preparing hypochlorous acid. Synthetic hypochlorous acid preparation equipment is not only suitable for producing high-concentration, high-flow-rate hypochlorous acid, but its simple structure also allows for miniaturization. However, because the raw materials used are acidic substances such as sodium hypochlorite and hydrochloric acid, inaccurate injection volume, uneven mixing, or operational errors can lead to a high risk of harmful gas (chlorine) leakage. Therefore, the synthetic method requires not only precise injection technology and efficient mixing technology, but also a sound management system. Due to the high safety risks of the synthetic method, synthetic hypochlorous acid preparation equipment is not suitable for widespread adoption as an economical hypochlorous acid preparation method.

[0005] In summary, as an economical hypochlorous acid preparation equipment, the electrolysis method has low concentration and small output, which cannot meet the requirements of a wider range of market applications. On the other hand, the synthesis method has safety hazards and is not suitable for widespread use and promotion as an economical hypochlorous acid preparation equipment. Utility Model Content

[0006] The purpose of this invention is to provide a device for producing hypochlorous acid based on ion exchange, in order to solve the above-mentioned problems existing in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An apparatus for producing hypochlorous acid based on ion exchange method, comprising:

[0009] The water inlet section has its liquid inlet end connected to an external water supply pipeline;

[0010] The liquid injection section, wherein the liquid inlet end of the liquid injection section is connected to the water inlet section;

[0011] The ion exchange unit has its inlet end connected to the injection unit and its outlet end connected to the hypochlorous acid user terminal via an external water supply pipeline; the diameter of the user terminal is greater than or equal to the diameter of the injection unit.

[0012] and a controller, wherein the controller is electrically connected to the electrical components in the water inlet and the liquid injection section.

[0013] Optionally, the water inlet section includes a water inlet valve and a water inlet flow sensor, wherein the water inlet valve is responsible for switching the water inlet of the water inlet section on and off, and the water inlet flow sensor is responsible for detecting the water inlet flow rate.

[0014] Optionally, the injection unit includes a water supply pipeline and an inlet pipeline. The front end of the water supply pipeline is connected to the water inlet unit, and the rear end is connected to the ion exchange unit. The inlet pipeline is a branch pipeline of the water supply pipeline. A pressure sensor is installed on the water supply pipeline to detect the water pressure. The inlet pipeline is equipped with a sodium hypochlorite stock solution supply tank, a liquid level sensor, and an injection pump. The sodium hypochlorite stock solution supply tank is located at the inlet end of the inlet pipeline. The liquid level sensor is responsible for detecting the presence or absence of sodium hypochlorite stock solution. The injection pump is responsible for drawing stock solution from the sodium hypochlorite stock solution supply tank and injecting it into the water supply pipeline.

[0015] Optionally, the water supply pipeline and the liquid inlet pipeline are connected by a T-joint connector.

[0016] Optionally, a check valve is provided between the injection pump and the three-way connector to prevent backflow of the injection fluid.

[0017] Optionally, the ion exchange unit includes a shell and a weakly acidic cation exchange core disposed within the shell, the core being filled with a weakly acidic cation exchange resin.

[0018] Optionally, the outer shell and the weakly acidic cation exchange core are detachably connected.

[0019] Optionally, it may also include a controller, which is electrically connected to the controller and is used to set the operating parameters of the device and control the operation of the device.

[0020] Optionally, it may also include an alarm device, which is electrically connected to the controller.

[0021] Beneficial effects: This invention discloses a device for producing hypochlorous acid based on ion exchange. It utilizes ion exchange technology, first diluting the sodium hypochlorite stock solution in the injection section, then contacting the diluted sodium hypochlorite solution with the weakly acidic cation exchange resin in the weakly acidic cation exchange core in the ion exchange section. During this contact, sodium ions from the sodium hypochlorite react with hydrogen ions from the weakly acidic cation exchange resin to generate hypochlorous acid. This invention not only produces high-concentration hypochlorous acid with a large output, but also the weakly acidic cation exchange resin possesses excellent pH buffering capabilities, thus eliminating the safety hazard of chlorine gas leakage.

[0022] In summary, as an economical hypochlorous acid preparation device, the ion exchange method perfectly solves the problems of low concentration and small flow rate of the electrolysis method, meeting the market requirements for hypochlorous acid concentration and output; it also effectively eliminates the safety hazard of harmful chlorine gas leakage. Therefore, the hypochlorous acid preparation device based on the ion exchange method of this invention has greater development potential and a broad market prospect, and will have a positive impact on the popularization of hypochlorous acid. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the functional structure of a device for producing hypochlorous acid based on ion exchange in an embodiment.

[0024] Figure 2 This is a schematic diagram of the overall structure of an apparatus for producing hypochlorous acid based on ion exchange in the embodiment (alarm device omitted).

[0025] In the diagram: 1. Water inlet; 101. Water inlet valve; 102. Water inlet flow sensor; 2. Liquid injection section; 21. Water delivery pipeline; 22. Liquid inlet pipeline; 3. Ion exchange section; 31. Outer shell; 32. Weakly acidic cation exchange core; 4. Controller; 5. Pressure sensor; 6. Sodium hypochlorite stock solution supply tank; 7. Liquid level sensor; 8. Liquid injection pump; 9. T-connector; 10. Check valve; 11. Control device. Detailed Implementation

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0027] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0029] Example

[0030] like Figures 1-2 As shown, this embodiment provides an apparatus for producing hypochlorous acid based on ion exchange, including...

[0031] Water inlet 1, wherein the liquid inlet end of the water inlet 1 is connected to an external water supply pipeline;

[0032] Injection section 2, the inlet end of which is connected to water inlet section 1;

[0033] Ion exchange unit 3, the inlet end of which is connected to the injection unit 2, and the outlet end of which is connected to the hypochlorous acid user terminal through an external water supply pipeline; the pipe diameter of the user terminal is greater than or equal to the pipe diameter of the injection unit 2.

[0034] and controller 4, which is electrically connected to the electrical components in the water inlet 1 and the liquid injection section 2.

[0035] Specifically, the inlet end of the water inlet 1 is connected to an external water supply pipeline, the outlet end of the water inlet 1 is connected to the inlet end of the injection section 2 through an internal pipeline, the outlet end of the injection section 2 is connected to the inlet end of the ion exchange section 3 through an internal pipeline, and the outlet end of the ion exchange section 3 is connected to the hypochlorous acid user terminal through an external water supply pipeline.

[0036] In an optional implementation, see Figure 2 The water inlet section 1 includes a water inlet valve 101 and a water inlet flow sensor 102. The water inlet valve 101 is responsible for switching the water inlet of the water inlet section 1, and the water inlet flow sensor 102 is responsible for detecting the water inlet flow rate. Water flows through the water inlet valve 101, passes through the water inlet flow sensor 102, and flows out from the liquid outlet of the water inlet section 1 into the liquid injection section 2. The water inlet valve 101 and the water inlet flow sensor 102 are electrically connected to the controller 4.

[0037] In an optional embodiment, the injection unit 2 includes a water supply pipeline 21 and an inlet pipeline 22. The front end of the water supply pipeline 21 is connected to the water inlet unit 1, and the rear end is connected to the ion exchange unit 3. The inlet pipeline 22 is a branch pipeline on the water supply pipeline 21. A pressure sensor 5 is installed on the water supply pipeline 21 to detect the water pressure. The inlet pipeline 22 is equipped with a sodium hypochlorite stock solution supply tank 6, a liquid level sensor 7, and an injection pump 8. The sodium hypochlorite stock solution supply tank 6 is located at the inlet end of the inlet pipeline 22. The liquid level sensor 7 is responsible for detecting the presence or absence of sodium hypochlorite stock solution. The injection pump 8 is responsible for drawing stock solution from the sodium hypochlorite stock solution supply tank 6 and injecting it into the water supply pipeline 21.

[0038] In the injection section 2, the water input from the water inlet section 1 is mixed with the sodium hypochlorite stock solution drawn from the sodium hypochlorite stock solution supply tank 6 to obtain a sodium hypochlorite diluted solution.

[0039] In an optional embodiment, the water supply pipeline 21 and the liquid inlet pipeline 22 are connected by a T-joint 9.

[0040] The T-connector 9 facilitates the injection of sodium hypochlorite into the influent and the output of sodium hypochlorite dilution.

[0041] In an optional embodiment, a check valve 10 is provided between the injection pump 8 and the three-way connector 9.

[0042] The check valve 10 prevents the injected sodium hypochlorite and influent from flowing back into the sodium hypochlorite stock solution supply tank 6.

[0043] In an optional embodiment, the ion exchange unit 3 includes a shell 31 and a weakly acidic cation exchange core 32 disposed within the shell 31, the core being filled with weakly acidic cation exchange resin. Specifically, both the shell 31 and the weakly acidic cation exchange core 32 have inlets and outlets, with the inlets of the shell 31 and the weakly acidic cation exchange core 32 connected accordingly. Sodium hypochlorite solution flows into the weakly acidic cation exchange core 32 through the inlets of the shell 31 and the weakly acidic cation exchange core 32, where it undergoes an ion exchange reaction with the weakly acidic cation exchange resin to generate hypochlorous acid. The generated hypochlorous acid flows to an external water supply pipe through the outlets of the weakly acidic cation exchange core 32 and the shell 31.

[0044] In an optional embodiment, the outer shell 31 is detachably connected to the weakly acidic cation exchange core 32; the detachable connection allows the weakly acidic cation exchange core 32 to be replaced at any time.

[0045] In an optional embodiment, a controller 11 is also included, which is electrically connected to the controller 4. The controller 11 is used to set the operating parameters of the device and to control the operation of the device.

[0046] In an optional implementation, an alarm device is also included, which is electrically connected to the controller 4; when the liquid level sensor 7 detects no raw liquid, an alarm can be issued to remind the user to check whether the equipment is working properly or to add raw liquid in time.

[0047] Working principle:

[0048] Step 1: After powering on controller 4 (device turned on), read the operating parameters.

[0049] Step 2: Check the pipeline pressure of injection section 2

[0050] The pressure of the water supply pipeline 21 is detected by pressure sensor 5.

[0051] If the pressure is normal, proceed to step three. If the pressure is abnormal, close the inlet valve 101 and stop the injection pump 8, then return to step two.

[0052] Step 3: Test the sodium hypochlorite stock solution in injection section 2

[0053] The presence or absence of sodium hypochlorite stock solution is detected by liquid level sensor 7.

[0054] If the original solution is available, proceed to step four. If the original solution is unavailable, stop the injection pump 8 and trigger an abnormal alarm, then return to step two.

[0055] Step 4: Injection

[0056] ① Open the inlet valve 101 of the inlet section 1 and detect the current inlet flow rate through the inlet flow sensor 102;

[0057] ② Calculate the required injection volume of sodium hypochlorite stock solution based on the equipment operating parameters and the current influent flow rate;

[0058] ③ Drive injection pump 8 to inject sodium hypochlorite according to the calculated injection volume requirement;

[0059] ④ Return to step two

[0060] Step 5: Ion exchange

[0061] The diluted sodium hypochlorite solution flows through the weakly acidic cation exchange core 32 for ion exchange, generating hypochlorous acid.

[0062] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An apparatus for producing hypochlorous acid based on ion exchange, characterized in that, include Water inlet (1), the liquid inlet end of the water inlet (1) is connected to an external water supply pipeline; the water inlet (1) includes a water inlet valve (101) and a water inlet flow sensor (102), the water inlet valve (101) is responsible for the water inlet switch of the water inlet (1), and the water inlet flow sensor (102) is responsible for detecting the water inlet flow; The liquid injection section (2) is connected to the water inlet section (1) at its inlet end; Ion exchange unit (3), the inlet end of the ion exchange unit (3) is connected to the injection unit (2), and the outlet end of the ion exchange unit (3) is connected to the hypochlorous acid user terminal through an external water supply pipeline; the pipe diameter of the user terminal is greater than or equal to the pipe diameter of the injection unit (2); and controller (4), the controller (4) being electrically connected to the electrical components in the water inlet (1) and the liquid injection section (2).

2. The apparatus for producing hypochlorous acid based on ion exchange method according to claim 1, characterized in that, The injection section (2) includes a water supply pipeline (21) and an inlet pipeline (22). The front end of the water supply pipeline (21) is connected to the inlet section (1), and the rear end is connected to the ion exchange section (3). The inlet pipeline (22) is a branch pipeline on the water supply pipeline (21). A pressure sensor (5) is installed on the water supply pipeline (21) to detect the water pressure of the water supply pipeline (21). The inlet pipeline (22) is equipped with a sodium hypochlorite stock solution supply tank (6), a liquid level sensor (7), and an injection pump (8). The sodium hypochlorite stock solution supply tank (6) is located at the inlet end of the inlet pipeline (22). The liquid level sensor (7) is responsible for detecting the presence or absence of sodium hypochlorite stock solution. The injection pump (8) is responsible for drawing the stock solution from the sodium hypochlorite stock solution supply tank (6) and injecting it into the water supply pipeline (21).

3. The apparatus for producing hypochlorous acid based on ion exchange method according to claim 2, characterized in that, The water supply pipeline (21) and the liquid inlet pipeline (22) are connected by a tee connector (9).

4. The apparatus for producing hypochlorous acid based on ion exchange method according to claim 3, characterized in that, A check valve (10) is provided between the injection pump (8) and the three-way connector (9) to prevent backflow of the injection fluid.

5. The apparatus for producing hypochlorous acid based on ion exchange method according to claim 1, characterized in that, The ion exchange unit (3) includes a shell (31) and a weakly acidic cation exchange core (32) disposed inside the shell (31), the core being filled with a weakly acidic cation exchange resin.

6. The apparatus for producing hypochlorous acid based on ion exchange method according to claim 5, characterized in that, The outer shell (31) is detachably connected to the weakly acidic cation exchange core (32).

7. The apparatus for producing hypochlorous acid based on ion exchange method according to claim 1, characterized in that, It also includes a controller (11), which is electrically connected to the controller (4). The controller (11) is used to set the operating parameters of the equipment and to control the operation of the equipment.

8. The apparatus for producing hypochlorous acid based on ion exchange method according to claim 1, characterized in that, It also includes an alarm device, which is electrically connected to the controller (4).

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