Safety hydrogen discharge device for sodium hypochlorite production

Abstract

The application discloses a safe hydrogen discharge device for sodium hypochlorite production, which comprises a sodium hypochlorite generator, a dehydrogenation tank, a blower, and a liquid storage tank. The sodium hypochlorite generator is connected with a gas-liquid separation tee joint through a first gas-liquid mixing pipe. An expansion cavity is arranged in the middle of the gas-liquid separation tee joint. A gas outlet in the upper part of the gas-liquid separation tee joint is connected with a main hydrogen discharge pipe. A liquid outlet in the lower part of the gas-liquid separation tee joint is connected with the upper part of the dehydrogenation tank through a second gas-liquid mixing pipe. The top part of the dehydrogenation tank is provided with a hydrogen discharge branch pipe connected with the main hydrogen discharge pipe and an air input pipe connected with the blower. The lower part of the dehydrogenation tank is further connected with the upper part of the liquid storage tank through a liquid outlet pipe. The gas-liquid separation tee joint and the dehydrogenation tank are arranged to realize the segmented separation of sodium hypochlorite solution and hydrogen, so that the sodium hypochlorite solution entering the liquid storage tank basically does not contain hydrogen, the safety of the liquid storage tank is improved, and the installation process of the liquid storage tank can be simplified.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sodium hypochlorite production equipment, in particular to a safe hydrogen discharge device for sodium hypochlorite production. BACKGROUND

[0002] The sodium hypochlorite generator is a device for generating sodium hypochlorite solution through electrolysis of brine. In the process of electrolysis of brine, hydrogen gas is generated as a byproduct. Hydrogen gas is a colorless, transparent, odorless, tasteless and hardly soluble gas which is extremely flammable. When the volume fraction of hydrogen gas mixed with air reaches 4.0% to 75.6%, it will explode or burn when exposed to fire. Therefore, the hydrogen gas generated by electrolysis of brine needs to be diluted by blowing a large amount of air to make it unable to explode and burn when being discharged.

[0003] The existing hydrogen gas treatment method is to directly add hydrogen gas and prepared sodium hypochlorite solution into a storage tank, then output hydrogen gas from the top of the storage tank, blow a large amount of air into the hydrogen gas output pipe to dilute hydrogen gas, and finally discharge the diluted hydrogen gas to the outdoor. This hydrogen gas discharge method has great limitations. Firstly, the storage tank generally requires storing a large amount of sodium hypochlorite solution, so the volume of the storage tank is large. This makes a large amount of hydrogen gas enter the storage tank when the liquid is first added. The air blown into the upper hydrogen gas output pipe forms pressure at the hydrogen gas output pipe, which makes it difficult for hydrogen gas above the storage tank to be output through the hydrogen gas output pipe at the top. Hydrogen gas can only be squeezed out of the hydrogen gas output pipe by the sodium hypochlorite solution in the storage tank. When the liquid level in the storage tank is low, the hydrogen gas concentration in the storage tank is extremely high, which affects the entry of sodium hypochlorite solution mixed with hydrogen gas. In addition, in the space with poor ventilation at the outlet of the hydrogen discharge pipe or in the environment where a clear fire is easily generated, it is difficult to ensure that the diluted hydrogen gas is below the explosion limit, and the explosion risk is high. In addition, due to the large volume of the storage tank, the installation of the hydrogen discharge pipe at the top of the storage tank is difficult, and the air volume requirement of the air blower is also high. SUMMARY

[0004] The application aims to provide a safe hydrogen discharge device for sodium hypochlorite production which has good safety and is easy to install.

[0005] The application realizes the technical scheme as follows: a safety hydrogen discharge device for sodium hypochlorite production, comprising a sodium hypochlorite generator, a dehydrogenation tank, a blower, and a liquid storage tank, wherein the sodium hypochlorite generator is connected with a gas-liquid separation tee joint through a first gas-liquid mixing pipe, the gas-liquid separation tee joint is provided with an expansion cavity in the middle, a gas outlet in the upper part of the gas-liquid separation tee joint is connected with a main hydrogen discharge pipe, and a liquid outlet in the lower part of the gas-liquid separation tee joint is connected with the upper part of the dehydrogenation tank through a second gas-liquid mixing pipe; the top of the dehydrogenation tank is provided with a branch hydrogen discharge pipe connected with the main hydrogen discharge pipe and an air input pipe connected with the blower; and the lower part of the dehydrogenation tank is further connected with the upper part of the liquid storage tank through a liquid outlet pipe.

[0006] The working principle of the technical scheme is that the gas-liquid separation tee joint and the dehydrogenation tank are arranged to realize the segmented separation of sodium hypochlorite solution and hydrogen, so that the sodium hypochlorite solution entering the liquid storage tank basically does not contain hydrogen; in addition, external cold air is input into the dehydrogenation tank, which can reduce the temperature of the sodium hypochlorite solution to further separate hydrogen from the sodium hypochlorite solution and can also affect the sodium hypochlorite solution stored in the liquid storage tank.

[0007] In order to better realize the application, further, a liquid pump is arranged in the sodium hypochlorite generator to input mixed hydrogen and sodium hypochlorite solution into the first gas-liquid mixing pipe.

[0008] In order to better realize the application, further, a closed water storage tank is further connected to the second gas-liquid mixing pipe.

[0009] In order to better realize the application, further, the water storage tank is in a U shape, one end of which is a water inlet and the water outlet is located on the side wall of the upper part of the other end.

[0010] In order to better realize the application, further, a water drop device is arranged in the dehydrogenation tank, one end of which is connected with the second gas-liquid mixing pipe.

[0011] In order to better realize the application, further, the water drop device is in a cylindrical shape, one end of which is connected with the second gas-liquid mixing pipe and the other end of which is closed, and the side wall of the upper part of the water drop device is provided with an opening.

[0012] In order to better realize the application, further, a gas outlet is arranged on the top of the liquid storage tank and a liquid outlet is arranged on the bottom of the liquid storage tank, and control valves are arranged at the gas outlet and the liquid outlet of the liquid storage tank.

[0013] In order to better realize the application, further, a liquid transfer pump is further arranged on the liquid outlet pipe.

[0014] Compared with the prior art, the application has the following advantages and beneficial effects:

[0015] (1) The hydrogen mixed in the sodium hypochlorite solution is discharged by sections, so that the sodium hypochlorite solution entering the liquid storage tank cannot emit hydrogen, the content of hydrogen in the liquid storage tank is greatly reduced, and the risk of explosion in the liquid storage tank is avoided;

[0016] (2) The content of hydrogen emitted in the liquid storage tank is extremely low, so that the hydrogen discharge pipeline does not need to be installed on the top of the liquid storage tank, and the liquid storage tank can be directly connected with the external environment, thereby reducing the installation cost and difficulty of the liquid storage tank;

[0017] (3) Compared with the existing hydrogen discharge equipment, the installation process of the hydrogen discharge equipment is simpler and more convenient, and the safety is higher, the defects of the existing hydrogen discharge equipment are overcome, the storage of sodium hypochlorite solution can be better, and the hydrogen discharge equipment is suitable for widespread application. BRIEF DESCRIPTION OF DRAWINGS

[0018] Other characteristics, objects and advantages of the present application will become more apparent after reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 It is a schematic diagram of the planar structure of the present application;

[0020] Figure 2 It is a three-dimensional structure diagram of the gas-liquid separation tee joint in the present application;

[0021] Figure 3 It is a three-dimensional structure diagram of the water drop device in the present application.

[0022] Wherein: 1 - sodium hypochlorite generator, 2 - first gas-liquid mixing pipe, 3 - gas-liquid separation tee joint, 4 - hydrogen discharge main pipe, 5 - second gas-liquid mixing pipe, 6 - water storage tank, 7 - hydrogen removal tank, 8 - hydrogen discharge branch pipe, 9 - air blower, 10 - air input pipe, 11 - liquid outlet pipe, 12 - liquid storage tank, 13 - water drop device, 14 - liquid transfer pump. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0024] In the description of the present application, it is to be understood by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the limitation of "first", "second" is only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly including one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0025] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Embodiment 1:

[0027] The main structure of this embodiment, as shown in Figure 1 , Figure 2 , includes a sodium hypochlorite generator 1, a dehydrogenation tank 7, a blower 9, a liquid storage tank 12, the sodium hypochlorite generator 1 is connected with a gas-liquid separation tee joint 3 through a first gas-liquid mixing pipe 2, an expansion cavity is arranged in the middle of the gas-liquid separation tee joint 3, a gas outlet in the upper part of the gas-liquid separation tee joint 3 is connected with a hydrogen discharge main pipe 4, a liquid outlet in the lower part of the gas-liquid separation tee joint 3 is communicated with the upper part of the dehydrogenation tank 2 through a second gas-liquid mixing pipe 5; the top of the dehydrogenation tank 7 is respectively provided with a hydrogen discharge branch pipe 8 communicated with the hydrogen discharge main pipe 4, and an air input pipe 10 communicated with the blower 9; the lower part of the dehydrogenation tank 7 is also communicated with the upper part of the liquid storage tank 12 through a liquid outlet pipe 11.

[0028] The specific implementation process is that the sodium hypochlorite generator 1 delivers the generated hydrogen and the sodium hypochlorite solution to the gas-liquid separation tee joint 3 through the first gas-liquid mixing pipe 2. Since the expanded cavity is arranged in the middle of the gas-liquid separation tee joint 3 and the hydrogen is difficult to be dissolved in the sodium hypochlorite solution, the hydrogen and the sodium hypochlorite solution are separated in the expanded cavity in the middle of the gas-liquid separation tee joint 3. The hydrogen flows out from the hydrogen discharge main pipe 4 arranged at the upper part of the gas-liquid separation tee joint 3, and the sodium hypochlorite solution mixed with a small amount of hydrogen flows to the hydrogen removal tank 7 from the second gas-liquid mixing pipe 5 arranged at the lower part of the gas-liquid separation tee joint 3. The sodium hypochlorite solution falls into the hydrogen removal tank 7 from the upper part of the hydrogen removal tank 7. During the falling process, the temperature of the sodium hypochlorite solution is reduced, and the hydrogen is difficult to be dissolved at a higher temperature. Therefore, the sodium hypochlorite solution and the hydrogen are further separated in the hydrogen removal tank 7. The hydrogen is discharged from the hydrogen discharge branch pipe 8 arranged at the top of the hydrogen removal tank 7 and is combined with the hydrogen in the hydrogen discharge main pipe 4. In addition, the air blower 9 inputs the external cold air into the hydrogen removal tank 7 through the air input pipe 10. On the one hand, the cold air provides the cooling capacity for the sodium hypochlorite solution, and on the other hand, the cold air is mixed with the hydrogen through the hydrogen discharge branch pipe 8 and is combined with the hydrogen in the hydrogen discharge main pipe 4, thereby reducing the hydrogen concentration in the hydrogen discharge main pipe 4 and the hydrogen discharge branch pipe 8. Through testing, the air output by the air blower 9 can reduce the hydrogen concentration in the hydrogen discharge main pipe 4 to below 0.4% (volume fraction) and reduce the hydrogen concentration in the hydrogen discharge branch pipe 8 to below 0.01% (volume fraction), so that the hydrogen concentration discharged from the hydrogen discharge main pipe 4 is far below the explosion limit of hydrogen. Finally, the sodium hypochlorite solution separated from the hydrogen in the hydrogen removal tank 7 is input into the liquid storage tank 12 through the liquid outlet pipe 11 for storage.

[0029] Example 2

[0030] In the example, the structure of the sodium hypochlorite generator 1 is further limited based on the above-mentioned example. The liquid pump for inputting the mixed hydrogen and the sodium hypochlorite solution into the first gas-liquid mixing pipe 2 is arranged in the sodium hypochlorite generator 1. The liquid pump in the sodium hypochlorite generator 1 mainly pumps out the hydrogen and the sodium hypochlorite solution generated by the sodium hypochlorite generator 1, provides the flow power for the hydrogen and the sodium hypochlorite solution, and enables the hydrogen and the sodium hypochlorite solution to smoothly enter the gas-liquid separation tee joint 3 through the first gas-liquid mixing pipe 2, so as to realize the separation of the hydrogen and the sodium hypochlorite solution. The other parts of the example are the same as those of the above-mentioned example, and will not be described herein again.

[0031] Example 3

[0032] In the example, the water storage tank 6 is further arranged based on the above-mentioned example. The water storage tank 6 is arranged at the lower part of the hydrogen removal tank 7. The water storage tank 6 is used to store the water used for the sodium hypochlorite generator 1. The water storage tank 6 is connected with the hydrogen removal tank 7 through the water input pipe 13 arranged at the lower part of the hydrogen removal tank 7. The water in the water storage tank 6 is input into the hydrogen removal tank 7 through the water input pipe 13, so as to cool the sodium hypochlorite solution in the hydrogen removal tank 7. Figure 1As shown, the second gas-liquid mixing pipe 5 is also connected with a closed water storage tank 6. The water storage tank 6 is arranged to reduce the flow rate of hydrogen and sodium hypochlorite solution, so that hydrogen and sodium hypochlorite solution can be separated again, and the water storage tank 6 also has the effect of liquid seal to avoid air in the dehydrogenation tank 7 entering the main hydrogen discharge pipe 4 through the second gas-liquid mixing pipe 5. The other parts of the embodiment are the same as the above-mentioned embodiments and will not be described again.

[0033] Embodiment 4:

[0034] This embodiment is based on the above-mentioned embodiments, and further limits the structure of the water storage tank 6, as shown in Figure 1 The water storage tank 6 is in a U shape, one end of which is a water inlet, and the water outlet is located on the side wall of the upper part of the other end. The structure of the water storage tank 6 is arranged in this way to have a better liquid seal effect. The other parts of the embodiment are the same as the above-mentioned embodiments and will not be described again.

[0035] Embodiment 5:

[0036] This embodiment is based on the above-mentioned embodiments, and further adds a water dropper 13, as shown in Figure 1 The dehydrogenation tank 7 is provided with a water dropper 13, which is installed on the inner wall above the dehydrogenation tank 7, and one end of which is in communication with the second gas-liquid mixing pipe 5. The water dropper 13 is arranged mainly to further disperse hydrogen and sodium hypochlorite solution, so that hydrogen and sodium hypochlorite solution can be separated more thoroughly, and at the same time, it can better absorb the cold of external air to reduce the temperature of hydrogen and sodium hypochlorite solution. The other parts of the embodiment are the same as the above-mentioned embodiments and will not be described again.

[0037] Embodiment 6:

[0038] This embodiment is based on the above-mentioned embodiments, and further limits the structure of the water dropper 13, as shown in Figure 3 The water dropper 13 is in a cylindrical shape, one end of which is in communication with the second gas-liquid mixing pipe 5, and the other end is closed, and the side wall of the upper part of the water dropper 13 is provided with an opening. The structure of the water dropper 13 is arranged in this way to better achieve the dispersion effect and make hydrogen and sodium hypochlorite solution separate more thoroughly. The other parts of the embodiment are the same as the above-mentioned embodiments and will not be described again.

[0039] Embodiment 7:

[0040] This embodiment is based on the above-mentioned embodiments, and further limits the structure of the water dropper 13, as shown in Figure 1As shown, the top of the liquid storage tank 12 is provided with a gas outlet, and the bottom of the liquid storage tank 12 is provided with a liquid outlet, and the gas outlet and the liquid outlet of the liquid storage tank 12 are both provided with control valves. When the liquid storage tank 12 is filled with liquid, the control valve of the gas outlet is opened, and the control valve of the liquid outlet is closed. When the liquid storage tank 12 is sealed, the control valves of the gas outlet and the liquid outlet are closed. When the sodium hypochlorite solution in the liquid storage tank 12 needs to be taken out for use, the control valves of the gas outlet and the liquid outlet are opened, so that the sodium hypochlorite solution can be smoothly taken out. The other parts of the embodiment are the same as the above-mentioned embodiments, and will not be described again.

[0041] Embodiment 8:

[0042] Based on the above-mentioned embodiments, the liquid transfer pump 14 is further added, as shown in the figure. Figure 1 As shown, the liquid outlet pipe 11 is also provided with a liquid transfer pump 14. The liquid transfer pump 14 can provide power for the sodium hypochlorite solution in the liquid outlet pipe 11, so as to ensure that the sodium hypochlorite solution in the dehydrogenation tank 7 can flow smoothly into the liquid storage tank 12. The other parts of the embodiment are the same as the above-mentioned embodiments, and will not be described again.

[0043] It can be understood that the working principle and working process of the components such as the sodium hypochlorite generator 1 and the liquid transfer pump 14 of the safety hydrogen discharge device structure for sodium hypochlorite production according to an embodiment of the present application are all prior art and are well known to those skilled in the art, and will not be described in detail here.

[0044] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A safe hydrogen discharge device for sodium hypochlorite production, characterized in that: The invention comprises a sodium hypochlorite generator (1), a dehydrogenation tank (7), a blower (9), and a liquid storage tank (12). The sodium hypochlorite generator (1) is connected to a gas-liquid separation tee (3) through a first gas-liquid mixing pipe (2). An expansion cavity is provided in the middle of the gas-liquid separation tee (3). The gas outlet on the upper part of the gas-liquid separation tee (3) is connected to a hydrogen discharge main pipe (4). The liquid outlet on the lower part of the gas-liquid separation tee (3) is connected to the upper part of the dehydrogenation tank (7) through a second gas-liquid mixing pipe (5). The top of the dehydrogenation tank (7) is respectively provided with a gas outlet connected to the hydrogen discharge main pipe (4). A hydrogen discharge branch pipe (8) and an air input pipe (10) connected to the blower (9); the lower part of the dehydrogenation tank (7) is also connected to the upper part of the liquid storage tank (12) through the liquid outlet pipe (11); a water dropper (13) is provided in the dehydrogenation tank (7), and the water dropper (13) is installed on the inner wall above the dehydrogenation tank (7), and one end thereof is connected to the second gas-liquid mixing pipe (5). The water dropper (13) is cylindrical, and one end of the water dropper (13) is connected to the second gas-liquid mixing pipe (5), and the other end is closed, and an opening is provided on the side wall of the upper part of the water dropper (13).

2. A safe hydrogen discharge device for sodium hypochlorite production according to claim 1, characterized in that: The sodium hypochlorite generator (1) is provided with a liquid pump for inputting the mixed hydrogen gas and the sodium hypochlorite solution into the first gas-liquid mixing pipe (2).

3. A safe hydrogen discharge device for sodium hypochlorite production according to claim 1 or 2, characterized in that: The second gas-liquid mixing pipe (5) is also connected to a closed water storage tank (6).

4. The safe hydrogen discharge device for sodium hypochlorite production according to claim 3, characterized in that: The water storage tank (6) is U-shaped, with one end being a water inlet and the water outlet being located on the side wall at the upper portion of the other end.

5. A safe hydrogen discharge device for sodium hypochlorite production according to claim 1 or 2, characterized in that: The top of the liquid storage tank (12) is provided with an air outlet, and the bottom of the liquid storage tank (12) is provided with a liquid outlet. Both the air outlet and the liquid outlet of the liquid storage tank (12) are provided with control valves.

6. A safe hydrogen discharge device for sodium hypochlorite production according to claim 1 or 2, characterized in that: The liquid outlet pipe (11) is also provided with a liquid transfer pump (14).

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