A hydrogen discharge device for a small-sized intermittent sodium hypochlorite generator

Abstract

The utility model discloses a kind of hydrogen discharge device for small intermittent sodium hypochlorite generator, with electrolytic cell, storage tank cooperation connection, hydrogen discharge device includes buffer tank, exhaust pipe and exhaust fan, the middle part of buffer tank is communicated with the liquid outlet end of electrolytic cell, storage tank upper portion is located buffer tank below and is communicated with buffer tank lower part;Exhaust fan is located on exhaust pipe, for making the gas in exhaust pipe wind guide according to exhaust pipe air inlet end towards exhaust pipe air outlet end;Exhaust fan divides exhaust pipe into air inlet section and air outlet section, air inlet section, buffer tank upper portion, storage tank upper portion are mutually communicated, air inlet section has the air inlet end of exhaust pipe, air inlet end is communicated with atmosphere, air outlet section has the air outlet end of exhaust pipe, air outlet end is communicated with atmosphere.The utility model can quickly extract the hydrogen generated by reaction to outdoor atmosphere by exhaust fan installed on exhaust pipe, effectively prevent hydrogen from gathering in electrolytic cell, buffer tank, storage tank and various pipelines.

Description

Technical Field

[0001] This utility model relates to the field of hypochlorite generator technology, and in particular to a hydrogen removal device for a small intermittent sodium hypochlorite generator. Background Technology

[0002] Sodium hypochlorite generators are a type of water treatment disinfection equipment. This equipment uses brine as a raw material and produces sodium hypochlorite solution through an electrolytic reaction. Sodium hypochlorite is a strong oxidizing agent and disinfectant, capable of killing bacteria in water. During the generation of sodium hypochlorite, hydrogen gas is also produced. Hydrogen is a flammable and explosive gas; when its concentration reaches 4.0%–75.6%, it may explode upon contact with a source of ignition. To ensure safety, the national standard GB 12176-90 "Sodium Hypochlorite Generators" Clause 5.2.5 requires that sodium hypochlorite generators with an effective chlorine output greater than 25 g / h must be equipped with a standard interface connecting to an outdoor exhaust pipe, i.e., a hydrogen venting device must be installed.

[0003] Existing hydrogen removal devices for hypochlorous acid generators are designed for continuous production sodium hypochlorite generators with large output. These sodium hypochlorite generators have a large hydrogen output, and their hydrogen removal devices have many factors to consider and are complex in design. They are not suitable for hydrogen removal treatment of small intermittent sodium hypochlorite generators (effective chlorine output less than or equal to 25g / h).

[0004] Small intermittent sodium hypochlorite generators have low effective chlorine production and produce little hydrogen. Although the national standard GB12176-90 "Sodium Hypochlorite Generators" does not require the installation of a hydrogen exhaust device, if such sodium hypochlorite generators are used for a long time in a poorly ventilated, enclosed environment, the hydrogen produced may accumulate over a long period of time and pose a risk.

[0005] To prevent accidents, it is necessary to design a dedicated hydrogen venting device for this type of sodium hypochlorite generator. The main function of this device is to promptly discharge the trace amounts of hydrogen generated by electrolysis into the outdoor atmosphere and prevent hydrogen from accumulating in the electrolytic cell, sodium hypochlorite storage tank, and pipelines.

[0006] Therefore, a hydrogen removal device specifically designed for small-scale intermittent hypochlorous acid generators is proposed. Utility Model Content

[0007] To address the shortcomings of existing technologies, this invention provides a hydrogen discharge device for a small intermittent sodium hypochlorite generator, which can promptly discharge the hydrogen generated by electrolysis into the outdoor atmosphere, preventing hydrogen from accumulating in the electrolytic cell, storage tank, and pipelines.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a hydrogen removal device for a small intermittent sodium hypochlorite generator, which is connected in conjunction with an electrolytic cell and a storage tank. The hydrogen removal device includes a buffer tank, an exhaust pipe, and an exhaust fan. The middle part of the buffer tank is connected to the outlet end of the electrolytic cell, and the upper part of the storage tank is located below the buffer tank and is connected to the lower part of the buffer tank. The exhaust fan is located on the exhaust pipe and is used to guide the gas in the exhaust pipe from the air inlet end to the air outlet end. The exhaust fan divides the exhaust pipe into an inlet section and an outlet section. The inlet section, the upper part of the buffer tank, and the upper part of the storage tank are interconnected. The inlet section has the inlet end of the exhaust pipe, which is connected to the atmosphere. The outlet section has the outlet end of the exhaust pipe, which is connected to the atmosphere.

[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model uses an exhaust fan installed on the exhaust pipe to quickly extract the hydrogen gas produced by the reaction into the outdoor atmosphere, effectively preventing hydrogen gas from accumulating in the electrolytic cell, buffer tank, storage tank, and various pipelines.

[0010] 2. This utility model uses a suction method to discharge hydrogen instead of a blowing method, which avoids the problem of hydrogen not being discharged smoothly due to the high inlet pressure of the hydrogen discharge pipe when using a blowing method.

[0011] 3. This utility model, through the design of a buffer tank, is applied to the production of intermittent sodium hypochlorite generators. For the gas-liquid mixture discharged from the electrolytic cell, the density of hydrogen is much smaller than that of liquid. When the gas-liquid mixture flows in the buffer tank, the density difference between gas and liquid causes stratification. Under the action of gravity, the gas will generate an upward buoyancy, thereby achieving gas-liquid separation and preventing hydrogen from entering the sodium hypochlorite storage tank to the greatest extent.

[0012] 4. This utility model connects the air inlet section, the upper part of the buffer tank, and the upper part of the storage tank to each other, while the air inlet section is open to the atmosphere. This ensures that the hydrogen can be significantly diluted when the exhaust fan is working, and also ensures that the electrolytic cell, buffer tank, and storage tank are open to the atmosphere, thus avoiding the problem of liquid flow obstruction due to pressure difference.

[0013] 5. The upper part of the buffer tank and the upper part of the storage tank of this utility model are interconnected, ensuring that the produced sodium hypochlorite solution can smoothly enter the storage tank, and that the residual hydrogen gas in the storage tank can be smoothly extracted to the outdoor atmosphere.

[0014] 6. This utility model has a simple design, low cost, and high efficiency.

[0015] Furthermore, the exhaust fan is equipped with a detection device for use.

[0016] Furthermore, the air intake section can be set horizontally or vertically.

[0017] Furthermore, the lower part of the buffer tank is connected to the upper part of the storage tank through the buffer tank outlet pipe, and the drain end of the electrolytic cell is connected to the buffer tank outlet pipe 5 through the electrolytic cell drain pipe. A drain valve is provided on the electrolytic cell drain pipe.

[0018] Furthermore, the electrolytic cell drain pipe is connected to a dilute brine inlet pipe, which is used to introduce dilute brine from the electrolytic cell drain end into the electrolytic cell.

[0019] Furthermore, the upper part of the buffer tank is connected to a hydrogen discharge pipe, and the upper part of the storage tank is connected to a vent pipe. The hydrogen exhaust pipe is connected to the intake section, and the vent pipe is connected to the intake section; or The hydrogen exhaust pipe is connected to the intake section, and the vent pipe is connected to the upper part of the buffer tank; or The hydrogen exhaust pipe is connected to the vent pipe, and the vent pipe is connected to the air intake section; or The hydrogen exhaust pipe is connected to the air intake section, and the ventilation pipe is connected to the hydrogen exhaust pipe.

[0020] Furthermore, the middle part of the buffer tank is connected to the outlet end of the electrolytic cell via the outlet pipe of the electrolytic cell. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 3 This is a schematic diagram of the structure of Embodiment 3 of this utility model; Figure 4 This is a schematic diagram of the structure of Embodiment 4 of this utility model; Figure 5 This is a schematic diagram of the structure of Embodiment 5 of the present invention; Figure 6 This is a schematic diagram of the structure of Embodiment 6 of the present invention; Figure 7 This is a schematic diagram of the structure of Embodiment 7 of this utility model; Figure 8 This is a schematic diagram of the structure of Embodiment 8 of this utility model; Figure 9 This is a schematic diagram of the structure of embodiment 9 of the present invention; Figure 10 The diagram shows three possible structures of the exhaust pipe of this utility model. Figure 11 The diagram shows three possible connections between the buffer tank and the electrolytic cell outlet pipe, the buffer tank outlet pipe, the hydrogen discharge pipe, and the vent pipe of this utility model.

[0022] In the diagram: Electrolytic cell 1, storage tank 2, buffer tank 3, electrolytic cell outlet pipe 4, buffer tank outlet pipe 5, hydrogen discharge pipe 6, exhaust pipe 7, gas inlet section 71, straight pipe section 711, inclined section 712, gas outlet section 72, exhaust fan 8, ventilation pipe 10, dilute brine inlet pipe 11, electrolytic cell drain pipe 12, drain valve 13. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] like Figure 1-11 As shown, a hydrogen venting device for a small intermittent sodium hypochlorite generator is connected in conjunction with the electrolytic cell 1 and storage tank 2 of the sodium hypochlorite generator. The hydrogen venting device includes a buffer tank 3, an exhaust pipe 7, and an exhaust fan 8.

[0025] In some embodiments of this utility model, such as Figures 1 to 9 and Figure 11 As shown, the buffer tank 3 is located to the side of the electrolytic cell 1. The outlet end of the electrolytic cell 1 is connected to the middle of the buffer tank 3 through the electrolytic cell outlet pipe 4. The storage tank 2 is installed below the buffer tank 3, and the lower part of the buffer tank 3 is connected to the upper part of the storage tank 2 through the buffer tank outlet pipe 5. The drain end of the electrolytic cell 1 is connected to the buffer tank outlet pipe 5 through the electrolytic cell drain pipe 12, and a drain valve 13 is provided on the electrolytic cell drain pipe 12. The electrolytic cell drain pipe 12 is connected to a dilute brine inlet pipe 11, which is used to introduce dilute brine from the drain end of the electrolytic cell 1 into the electrolytic cell 1. The purpose of connecting the buffer tank outlet pipe 5 to the lower part of the buffer tank 3 is to facilitate the diverted liquid to enter the storage tank 2 below the buffer tank 3 under the action of gravity. Therefore, only if the above requirements are met can the buffer tank outlet pipe 5 and the buffer tank 3 be connected in multiple ways. The embodiments of this utility model show two connection methods. One is as follows: Figures 1 to 9 as well as Figure 11 As shown in (3), the inlet end of the buffer tank outlet pipe 5 is connected to the bottom wall of the buffer tank 3; secondly, as shown in (3), Figure 11 As shown in (1) and (2), the inlet end of the buffer tank outlet pipe 5 is connected to the bottom of the side wall of the buffer tank 3.

[0026] Since the sodium hypochlorite generator is an intermittent unit, during production, the drain valve 13 is closed, and dilute brine enters the electrolytic cell 1 from the dilute brine inlet pipe 11 (pumped, dilute brine flows unidirectionally). After electrolysis, the drain valve 13 is opened, and the mixed solution composed of sodium hypochlorite disinfectant and dilute brine in the electrolytic cell 1 flows to the storage tank 2 through the electrolytic cell drain pipe 12 and the buffer tank outlet pipe 5. This structure ensures that no sodium hypochlorite disinfectant remains in the electrolytic cell 1 when it stops working, which greatly extends the service life of the electrodes in the electrolytic cell 1 and also prevents the remaining sodium hypochlorite disinfectant in the electrolytic cell 1 from flowing back into the water pump outlet pipe, avoiding any impact on the next electrolysis. Compared with continuously operating sodium hypochlorite generators, since the amount of electrolyte in the electrolytic cell 1 of a continuously operating sodium hypochlorite generator is very small compared to the total amount, draining is not considered.

[0027] The buffer tank 3 is used to receive the gas-liquid mixture of sodium hypochlorite solution and a small amount of hydrogen gas discharged from the electrolytic cell 1. The gas-liquid mixture enters the buffer tank 3 from the middle. The buffer tank 3 has a tank structure with a certain depth. The inlet of the buffer tank outlet pipe 5 is located at the bottom of the buffer tank 3. When the gas-liquid mixture enters the buffer tank 3 and flows along the buffer tank 3, because the density of hydrogen gas is much smaller than that of liquid, the gas-liquid mixture separates into layers due to the density difference. Under the action of gravity, the gas will generate an upward buoyancy, realizing gas-liquid separation and preventing hydrogen gas from entering the sodium hypochlorite storage tank 2 to the greatest extent. In order to discharge the hydrogen gas collected at the top of the buffer tank 3, this utility model has a hydrogen discharge pipe 6 connected to the top of the buffer tank 3. The hydrogen discharge pipe 6 is connected to the exhaust pipe 7. Similarly, since the hydrogen gas is collected at the top of the buffer tank 3, there can be multiple connection positions between the hydrogen discharge pipe 6 and the top of the buffer tank 3 in order to facilitate the discharge of hydrogen gas. The embodiments of this utility model show two connection methods. One is as follows: Figures 1 to 9 as well as Figure 11 As shown in (1), the inlet end of the hydrogen discharge pipe 6 is connected to the top wall of the buffer tank 3; secondly, as shown in (1), Figure 11 As shown in (3), the inlet end of the hydrogen discharge pipe 6 is connected to the top of the side wall of the buffer tank 3.

[0028] Hydrogen gas will be discharged from the top of the buffer tank. Since the hydrogen production per unit time of a small intermittent sodium hypochlorite generator is relatively small (for example, a sodium hypochlorite generator with an effective chlorine production of 20 g / h theoretically produces 0.1043 L of hydrogen per minute), hydrogen gas is not easily discharged automatically from the top of the buffer tank without external force. Therefore, in some embodiments of this invention, an exhaust pipe 7 and an exhaust fan 8 are also provided. The external force of the exhaust fan carries the hydrogen gas out, achieving a large-scale dilution with the indoor air while simultaneously removing it from the buffer tank 3. Specifically, the exhaust fan 8 is located on the exhaust pipe 7 and is used to guide the gas in the exhaust pipe 7 from the inlet end to the outlet end. The installation of the exhaust fan 8 and the exhaust pipe 7 enables airflow within the exhaust pipe 7. The exhaust fan 8 model includes, but is not limited to, the 808038M industrial frequency converter fan. When the exhaust fan 8 is powered on, air can flow in the exhaust pipe 7. In order to remove the hydrogen from the buffer tank 3 and the pipe, it is necessary to ensure that the buffer tank 3 is connected to the exhaust pipe 7 and is located on the air intake side of the exhaust pipe 7.

[0029] In practical use, the exhaust fan 8, besides extracting hydrogen from the system, also mixes hydrogen with outside air to reduce the hydrogen content for venting outdoors. Therefore, during use, the exhaust fan 8 must be started first, followed by the preparation system. If the exhaust fan 8 malfunctions (i.e., it shows as started but doesn't rotate), the preparation system will start, and the hydrogen generated within the system will be directly discharged from the inlet section 71 of the exhaust pipe 7, preventing the exhaust device from diluting the hydrogen. Therefore, the exhaust fan 8 of this invention is equipped with a detection device for coordinated use. The detection component is a sensor, which can be a wind speed sensor. Utilizing the difference between impeller rotation and heat dissipation, it outputs an electrical signal (4-20mA / 0-5V) corresponding to the wind speed to determine if the exhaust fan 8 is operating normally. If an abnormality is detected, the signal detected by the sensor is transmitted to the central controller of the entire system (PLC programmer, microcontroller, etc.), and then alerts the operator through light alarms, buzzer alarms, etc., to prevent the preparation system from starting or to directly stop its operation. Alternatively, the sensor can be a current sensor, fitted outside the power cord of the exhaust fan 8 (non-contact type), used to detect the circuit current (the operating current of the exhaust fan 8 is much greater than the standby current). Similarly, the detected signal is fed back to the central controller of the entire system (PLC programmer, microcontroller, etc.), and then alerts the operator through light alarms, buzzer alarms, etc., to prevent the preparation system from starting or to directly stop its operation. The detection component further ensures the safety of system operation.

[0030] In some embodiments of this utility model, such as Figures 1 to 9As shown, based on the installation principle of the exhaust fan 8, the exhaust fan is located in the middle of the exhaust pipe 7, which can divide the exhaust pipe 7 into an inlet section 71 and an outlet section 72. It is only necessary to ensure that the inlet section 71, the upper part of the buffer tank 3, and the upper part of the storage tank 2 are interconnected. The inlet section 71 has the inlet end of the exhaust pipe 7, which is connected to the atmosphere, and the outlet section 72 has the outlet end of the exhaust pipe 7, which is connected to the atmosphere. The entire exhaust pipe 7 can be a straight pipe or a non-standard pipe. As long as the air intake section 71 of the exhaust fan 8, the upper part of the buffer tank 3, and the upper part of the storage tank 2 are connected to each other, the upper part of the buffer tank 3 and the upper part of the storage tank 2 will be open to the atmosphere regardless of whether the exhaust fan 8 is working. This method can ensure that the buffer tank 3 and the storage tank 2 are connected, and that the liquid can enter the storage tank 2 smoothly. At the same time, when the exhaust fan 8 is working, it will exhaust the hydrogen in the system by means of ventilation. During this process, due to the presence of the air intake end on the air intake section 71, it can also mix the hydrogen with the indoor air while extracting the hydrogen. The hydrogen can be diluted to a large extent before being discharged into the outdoor atmosphere.

[0031] In theory, as long as the intake section 71 has an air inlet that communicates with the atmosphere, it can fulfill its function. Therefore, the intake section 71 can be a straight pipe structure as a whole. Figure 5 and 10 As shown in (3), one end of the air intake section 71 is opened as the air intake port of the air intake section 71, and the other end is connected to the exhaust fan 8; as shown in (3), Figure 10 As shown in Figure (2), one end of the air intake section 71 is sealed, and the air inlet is located in the middle of the air intake section 71, while the other end of the air intake section 71 is connected to the exhaust fan 8. Of course, the air intake section 71 can also adopt an irregular structure made of multiple pipe segments spliced ​​(welded), such as Figures 1 to 9 as well as Figure 10 As shown in (1), the intake section 71 has a straight pipe section 711 and an inclined section 712. One end of the straight pipe section 711 is connected to the exhaust fan 8, and the other end of the straight pipe section 711 is connected to one end of the inclined section 712. The other end of the inclined section 712 is the intake end of the exhaust pipe 7. Figure 10As shown in Figure (1), one end of the straight pipe section 711 is connected to the exhaust fan 8, and the other end of the straight pipe section 711 is sealed. The middle part of the straight pipe section 711 is connected to one end of the inclined section 712, and the other end of the inclined section 712 is the air inlet of the exhaust pipe 7. The connection between the straight pipe section 711 and the inclined section 712 only needs to meet two conditions: first, only one end of the air inlet section 71 is connected to the atmosphere, which is the air inlet of the entire exhaust pipe 7; second, the air inlet direction needs to be adjusted. By using the method of connecting one end of the inclined section 712 to the straight pipe section 711 at an obtuse angle, the airflow drawn into the straight pipe section 711 can be "slowed down" to reduce the impact on the hydrogen entering the pipe. In fact, the inclined section 712 can be understood as a branch pipe that is inclined to connect to the entire exhaust pipe 7. Using this branch pipe to change the air inlet direction is more conducive to the use of the entire hydrogen exhaust device. Therefore, the air inlet section 71 can have at least two structures. Compared to the straight-pipe structure of the intake section 71, the intake section 71 with an inclined section 712 can significantly improve the problems of wind resistance and gas turbulence in the exhaust pipe 7.

[0032] In some embodiments of this utility model, such as Figure 1-10 As shown, in actual installation, the intake section 71 can be set horizontally or vertically. Since the intake section 71 can have various structures, it can therefore have... Figure 1-10 Multiple connection methods are available. Of course, when the straight pipe section 711 is set horizontally, the buffer tank 3 and the storage tank 2 are both located below the straight pipe section 711, and the inclined section 712 is preferably set downwards with an inclination angle of 135°; when the straight pipe section 711 is set vertically, the airflow direction of the straight pipe section 711 is preferably from bottom to top.

[0033] In some embodiments of this utility model, such as Figures 1 to 9 as well as Figure 11 As shown, to achieve interconnection between the upper part of the buffer tank 3, the air inlet section 71, and the upper part of the storage tank 2, at least the following connection methods are available. Specifically, the upper part of the buffer tank 3 is connected to a hydrogen discharge pipe 6, and the upper part of the storage tank 2 is connected to a vent pipe 10. Firstly, the hydrogen discharge pipe 6 is connected to the air inlet section 71, and the vent pipe 10 is also connected to the air inlet section 71; secondly, the hydrogen discharge pipe 6 is connected to the air inlet section 71, and the vent pipe 10 is connected to the upper part of the buffer tank 3; thirdly, the hydrogen discharge pipe 6 is connected to the vent pipe 10, and the vent pipe 10 is connected to the air inlet section 71; fourthly, the hydrogen discharge pipe 6 is connected to the air inlet section 71, and the vent pipe 10 is connected to the hydrogen discharge pipe 6.

[0034] This utility model will be illustrated with some of its embodiments in conjunction with the foregoing textual description.

[0035] Example 1 like Figure 1As shown, in this embodiment, the buffer tank 3 is installed next to the electrolytic cell 1 and above the storage tank 2. The buffer tank 3 is connected to the electrolytic cell 1 through the electrolytic cell outlet pipe 4, and to the storage tank 2 through the buffer tank outlet pipe 5. The buffer tank 3 is also connected to the exhaust pipe 7 (straight pipe section 711) through the hydrogen discharge pipe 6. The vent pipe 10 connected to the upper part of the storage tank 2 is connected to the exhaust pipe 7 (straight pipe section 711). The middle part of the buffer tank outlet pipe 5 is connected to the electrolytic cell drain pipe 12, and the other end of the electrolytic cell drain pipe 12 is connected to the dilute brine inlet pipe 11. A drain valve 13 is installed on the electrolytic cell drain pipe 12. The exhaust pipe 7 is set horizontally. The exhaust fan 8 has an air volume of 26.5 CFM and is installed on the exhaust pipe 7. When the exhaust fan 8 is working, it guides air from left to right through the exhaust pipe 7. The air inlet section 71 of the exhaust pipe 7 is located on the left side of the figure. The inclined section 712 is inclined downward and connected to the end of the straight pipe section 711. The ends of the exhaust pipe 7 that are connected to the outdoor atmosphere are equipped with metal mesh to prevent mosquitoes from entering.

[0036] Example 2 like Figure 2 As shown, the difference between this embodiment and embodiment 1 is that the buffer tank 3 is connected to the vent pipe 10 connected to the upper part of the storage tank 2 through the hydrogen discharge pipe 6, and the vent pipe 10 is connected to the exhaust pipe 7 (straight pipe section 711).

[0037] Example 3 like Figure 3 As shown, the difference between this embodiment and embodiment 1 is that the buffer tank 3 is connected to the exhaust pipe 7 (straight pipe section 711) through the hydrogen exhaust pipe 6, and the vent pipe 10 connected to the upper part of the storage tank 2 is connected to the hydrogen exhaust pipe 6.

[0038] Example 4 like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that the buffer tank 3 is connected to the exhaust pipe 7 (straight pipe section 711) through the hydrogen exhaust pipe 6, and the vent pipe 10 connected to the upper part of the storage tank 2 is connected to the upper part of the buffer tank 3.

[0039] Example 5 like Figure 5 As shown, the difference between this embodiment and embodiment 1 is that the intake section 71 of the exhaust pipe 7 is a straight pipe structure, the intake section 71 is set horizontally, and the left port opening of the intake section 71 is set as an intake port.

[0040] Example 6 like Figure 6 As shown, the difference between the connection of each pipe in this embodiment and that in embodiment 1 is that: the exhaust pipe 7 is set vertically as a whole, the air volume of the exhaust fan 8 is 26.5 CFM, and it is installed on the pipe of the exhaust pipe 7. When the exhaust fan 8 works, it can guide air from bottom to top through the exhaust pipe 7. The air inlet section 71 of the exhaust pipe 7 is located at the bottom of the figure, the straight pipe section 711 is set vertically, and the inclined section 712 is inclined downward and connected to the end of the straight pipe section 711.

[0041] Example 7 like Figure 7 As shown, the difference between the connection of each pipe in this embodiment and that in embodiment 2 is that: the exhaust pipe 7 is set vertically as a whole, the air volume of the exhaust fan 8 is 26.5 CFM, and it is installed on the pipe of the exhaust pipe 7. When the exhaust fan 8 works, it can guide air from bottom to top through the exhaust pipe 7. The air inlet section 71 of the exhaust pipe 7 is located at the bottom of the figure, the straight pipe section 711 is set vertically, and the inclined section 712 is inclined downward and connected to the end of the straight pipe section 711.

[0042] Example 8 like Figure 8 As shown, the difference between the connection of each pipe in this embodiment and that in embodiment 3 is that: the exhaust pipe 7 is set vertically as a whole, the air volume of the exhaust fan 8 is 26.5 CFM, and it is installed on the pipe of the exhaust pipe 7. When the exhaust fan 8 works, it can guide air from bottom to top through the exhaust pipe 7. The air inlet section 71 of the exhaust pipe 7 is located at the bottom of the figure. The straight pipe section 711 is set vertically, and the inclined section 712 is inclined downward and connected to the end of the straight pipe section 711.

[0043] Example 9 like Figure 9 As shown, the difference between the connection of each pipe in this embodiment and that in embodiment 4 is that: the exhaust pipe 7 is set vertically as a whole, the air volume of the exhaust fan 8 is 26.5 CFM, and it is installed on the pipe of the exhaust pipe 7. When the exhaust fan 8 works, it can guide air from bottom to top through the exhaust pipe 7. The air inlet section 71 of the exhaust pipe 7 is located at the bottom of the figure. The straight pipe section 711 is set vertically, and the inclined section 712 is inclined downward and connected to the end of the straight pipe section 711.

[0044] It is worth noting that in embodiments 1 to 9, the inlet end of the buffer tank outlet pipe 5 is connected to the bottom wall of the buffer tank 3. In actual installation, the connection method between the buffer tank outlet pipe 5 and the buffer tank 3 can also be adopted. Figure 11 The connection is made in the manner shown in (1) and (2). Similarly, in Examples 1 to 9, the inlet end of the hydrogen discharge pipe 6 is connected to the top wall of the buffer tank 3. In actual installation, the connection between the hydrogen discharge pipe 6 and the buffer tank 3 can also be made in the manner shown in (1) and (2). Figure 11 The connection is made in the manner shown in (3). Furthermore, since the vent pipe 10 is connected to the inlet section 71, the upper part of the buffer tank 3, or the hydrogen exhaust pipe 6, the connection positions of the vent pipe 10, the hydrogen exhaust pipe 6, and the buffer tank 3 can be determined based on different connection methods. In addition to the methods shown in Examples 1-9, the connection positions of the vent pipe 10, the hydrogen exhaust pipe 6, and the buffer tank 3 can also be... Figure 11 The methods in (2) and (3) are as follows: Figure 11 (2) In this part, the inlet end of the hydrogen exhaust pipe 6 is connected to the top of the side wall of the buffer tank 3, and the vent pipe 10 is connected to the hydrogen exhaust pipe 6; Figure 11In (3), the inlet end of the hydrogen exhaust pipe 6 is connected to the top of the side wall of the buffer tank 3, and the vent pipe 10 is connected to the inlet section 71. Of course, the connection method shown in this embodiment is only a partial structure of this utility model.

[0045] The principle of this utility model: The sodium hypochlorite solution and hydrogen gas produced by electrolytic cell 1 enter the buffer tank 3 together through the electrolytic cell outlet pipe 4. The sodium hypochlorite solution falls to the bottom of the buffer tank 3 due to gravity, and then falls into the storage tank 2 through the buffer tank outlet pipe 5. The hydrogen gas moves upwards in the buffer tank 3 due to gravity and the combined effect of the exhaust fan 8, and then enters the exhaust pipe 7 through the hydrogen venting pipe 6. The exhaust fan 8 is turned on when electrolysis starts and turned off after electrolysis. When the exhaust fan 8 is running, it draws hydrogen gas from the buffer tank 3 into the exhaust pipe and simultaneously draws indoor air into the exhaust pipe 7 through the air inlet. The hydrogen gas in the exhaust pipe 7 is diluted by a large proportion of the indoor air before being discharged into the outdoor atmosphere. The function of the vent pipe is to ensure that the pressure in the buffer tank 3 and the storage tank 2 is the same, so that the sodium hypochlorite solution in the buffer tank 3 can smoothly fall into the storage tank 2 due to gravity.

[0046] In summary, it can be seen that: 1. This utility model uses an exhaust fan installed on the exhaust pipe to quickly extract the hydrogen gas produced by the reaction into the outdoor atmosphere, effectively preventing hydrogen gas from accumulating in the electrolytic cell, buffer tank, storage tank, and various pipelines.

[0047] 2. This utility model uses a suction method to discharge hydrogen instead of a blowing method, which avoids the problem of hydrogen not being discharged smoothly due to the high inlet pressure of the hydrogen discharge pipe when using a blowing method.

[0048] 3. This utility model, through the design of a buffer tank, is applied to the production of intermittent sodium hypochlorite generators. For the gas-liquid mixture discharged from the electrolytic cell, the density of hydrogen is much smaller than that of liquid. When the gas-liquid mixture flows in the buffer tank, the density difference between gas and liquid causes stratification. Under the action of gravity, the gas will generate an upward buoyancy, thereby achieving gas-liquid separation and preventing hydrogen from entering the sodium hypochlorite storage tank to the greatest extent.

[0049] 4. This utility model connects the air inlet section, the upper part of the buffer tank, and the upper part of the storage tank to each other, while the air inlet section is open to the atmosphere. This ensures that the hydrogen can be significantly diluted when the exhaust fan is working, and also ensures that the electrolytic cell, buffer tank, and storage tank are open to the atmosphere, thus avoiding the problem of liquid flow obstruction due to pressure difference.

[0050] 5. The upper part of the buffer tank and the upper part of the storage tank of this utility model are interconnected, ensuring that the produced sodium hypochlorite solution can smoothly enter the storage tank, and that the residual hydrogen gas in the storage tank can be smoothly extracted to the outdoor atmosphere.

[0051] 6. This utility model has a simple design, low cost, and high efficiency.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hydrogen removal device for a small intermittent sodium hypochlorite generator, connected in conjunction with an electrolytic cell (1) and a storage tank (2), characterized in that: It includes a buffer tank (3), an exhaust pipe (7), and an exhaust fan (8). The middle part of the buffer tank (3) is connected to the liquid outlet of the electrolytic cell (1), and the upper part of the storage tank (2) is located below the buffer tank (3) and is connected to the lower part of the buffer tank (3); The exhaust fan (8) is located on the exhaust pipe (7) and is used to guide the gas in the exhaust pipe (7) from the air inlet end of the exhaust pipe (7) toward the air outlet end of the exhaust pipe (7); The exhaust fan (8) divides the exhaust pipe (7) into an intake section (71) and an exhaust section (72). The intake section (71), the upper part of the buffer tank (3), and the upper part of the storage tank (2) are interconnected. The intake section (71) has the intake end of the exhaust pipe (7) and the intake end is connected to the atmosphere. The exhaust section (72) has the exhaust end of the exhaust pipe (7) and the exhaust end is connected to the atmosphere.

2. The hydrogen removal device for a small intermittent sodium hypochlorite generator according to claim 1, characterized in that: The exhaust fan (8) is equipped with a detection device for use.

3. The hydrogen removal device for a small intermittent sodium hypochlorite generator according to claim 2, characterized in that: The intake section (71) is set horizontally or vertically.

4. The hydrogen removal device for a small intermittent sodium hypochlorite generator according to claim 1, characterized in that: The intake section (71) is set horizontally or vertically.

5. The hydrogen removal device for a small intermittent sodium hypochlorite generator according to any one of claims 1-4, characterized in that: The lower part of the buffer tank (3) is connected to the upper part of the storage tank (2) through the buffer tank outlet pipe (5). The drain end of the electrolytic cell (1) is connected to the buffer tank outlet pipe (5) through the electrolytic cell drain pipe (12). The electrolytic cell drain pipe (12) is equipped with a drain valve (13).

6. The hydrogen removal device for a small intermittent sodium hypochlorite generator according to claim 5, characterized in that: The electrolytic cell drain pipe (12) is connected to the dilute brine inlet pipe (11), which is used to introduce dilute brine from the drain end of the electrolytic cell (1) into the electrolytic cell (1).

7. The hydrogen removal device for a small intermittent sodium hypochlorite generator according to claim 1, 2, 3, 4 or 6, characterized in that: The upper part of the buffer tank (3) is connected to the hydrogen discharge pipe (6), and the upper part of the storage tank (2) is connected to the vent pipe (10). The hydrogen exhaust pipe (6) is connected to the air intake section (71), and the vent pipe (10) is connected to the air intake section (71); or The hydrogen exhaust pipe (6) is connected to the air inlet section (71), and the vent pipe (10) is connected to the upper part of the buffer tank (3); or The hydrogen exhaust pipe (6) is connected to the vent pipe (10), and the vent pipe (10) is connected to the air inlet section (71); or The hydrogen exhaust pipe (6) is connected to the air intake section (71), and the ventilation pipe (10) is connected to the hydrogen exhaust pipe (6).

8. The hydrogen removal device for a small intermittent sodium hypochlorite generator according to claim 7, characterized in that: The middle part of the buffer tank (3) is connected to the outlet end of the electrolytic cell (1) through the outlet pipe (4) of the electrolytic cell.

9. The hydrogen removal device for a small intermittent sodium hypochlorite generator according to claim 5, characterized in that: The upper part of the buffer tank (3) is connected to the hydrogen discharge pipe (6), and the upper part of the storage tank (2) is connected to the vent pipe (10). The hydrogen exhaust pipe (6) is connected to the air intake section (71), and the vent pipe (10) is connected to the air intake section (71); or The hydrogen exhaust pipe (6) is connected to the air inlet section (71), and the vent pipe (10) is connected to the upper part of the buffer tank (3); or The hydrogen exhaust pipe (6) is connected to the vent pipe (10), and the vent pipe (10) is connected to the air inlet section (71); or The hydrogen exhaust pipe (6) is connected to the air intake section (71), and the ventilation pipe (10) is connected to the hydrogen exhaust pipe (6).

10. The hydrogen removal device for a small intermittent sodium hypochlorite generator according to claim 9, characterized in that: The middle part of the buffer tank (3) is connected to the outlet end of the electrolytic cell (1) through the outlet pipe (4) of the electrolytic cell.

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