Hydrogen-oxygen separation safe discharge device for sodium hypochlorite preparation

Abstract

The utility model discloses a hydrogen-oxygen separation safe discharge device for sodium hypochlorite preparation, and relates to the technical field of gas filtration. The hydrogen-oxygen separation safe discharging device for sodium hypochlorite preparation comprises a discharging chamber, the interior of the discharging chamber is divided into an upper layer and a lower layer, a communicating pipe is fixedly installed on one side of the discharging chamber, sodium hypochlorite preparation equipment is communicated with the lower layer of the discharging chamber through the communicating pipe, a valve is fixedly installed on the communicating pipe, and a liquid storage tank is arranged on the other side of the discharging chamber; the lower portion of the discharge chamber is fixedly connected with a liquid discharge pipe, and the lower layer of the discharge chamber is communicated with the liquid storage tank through the liquid discharge pipe. According to the hydrogen-oxygen separation safe discharging device for sodium hypochlorite preparation, the safety valve is automatically opened when gas in the lower layer of the discharging chamber reaches the set pressure, hydrogen enters the upper layer of the discharging chamber, a large amount of air is fed by the air blower to be mixed with the hydrogen, and the gas is mixed in the channel, then enters the exhaust pipe to be stirred and mixed uniformly and is discharged into the atmospheric environment; hydrogen is fully mixed with air, so that the explosion risk is reduced, and the production stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas filtration technology, and in particular to a safe emission device for hydrogen-oxygen separation in the preparation of sodium hypochlorite. Background Technology

[0002] Sodium hypochlorite, as an important disinfectant and bleaching agent, is widely prepared by electrolysis of brine. The explosion limit of hydrogen gas generated at the cathode in this process is 4%-75.6%, which is a major safety hazard. Existing hydrogen-oxygen separation and safety emission devices generally have problems such as incomplete gas-liquid separation, low mixing and dilution efficiency, and lack of pressure control.

[0003] The hydrogen gas produced by electrolysis carries a large amount of sodium hypochlorite droplets and condensate. If there is no demister to intercept and capture it, the wet chlorine gas and salt solution will directly enter the discharge pipe. Sodium hypochlorite solution has strong oxidizing and corrosive properties. Long-term adhesion to the inner wall of the pipe will cause pitting and intergranular corrosion of the metal material, resulting in thinning of the pipe wall and increased risk of leakage. The salt in the droplets may crystallize due to water evaporation, clogging valves, sensors and other precision components, causing flow monitoring failure, system control failure, and even short circuit of liquid accumulation in the cathode chamber of the electrolytic cell, affecting the continuous production of sodium hypochlorite.

[0004] If traditional equipment is not equipped with safety valves and relies solely on manual or crude pressure switch control, it cannot respond to sudden changes in system pressure in real time. When the load of the electrolyzer fluctuates, the pipeline is partially blocked, or the fan fails, hydrogen accumulates in the separation unit, and the pressure may quickly exceed the equipment's pressure resistance limit. At this time, if there is no automatic pressure relief protection from the safety valve, it may cause the equipment shell to rupture, hydrogen to explode, or even affect the electrolyzer body, causing a chain of accidents such as chlorine leakage.

[0005] Uniform mixing of hydrogen and air is a core element in ensuring emission safety. Relying solely on natural mixing via a blower connected directly to the pipeline can lead to problems such as localized excessive concentrations, low mixing efficiency, and unstable flow resistance.

[0006] In summary, the existing equipment has significant deficiencies in safety, reliability, and compliance due to the lack of gas-liquid separation devices, safety pressure switches, and efficient mixing devices. Utility Model Content

[0007] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a safe emission device for hydrogen-oxygen separation in the preparation of sodium hypochlorite, which can solve the above-mentioned problem.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a safe emission device for hydrogen-oxygen separation in sodium hypochlorite preparation, comprising an emission chamber, the interior of which is divided into upper and lower layers, a connecting pipe fixedly installed on one side of the emission chamber, the connecting pipe connecting the sodium hypochlorite preparation equipment to the lower layer of the emission chamber, a valve fixedly installed on the connecting pipe, a storage tank provided on the other side of the emission chamber, a drain pipe fixedly connected to the bottom of the emission chamber, and the lower layer of the emission chamber and the storage tank being connected by the drain pipe;

[0009] An exhaust pipe is fixedly connected to the top of the exhaust chamber, and a blower is placed around the exterior of the exhaust chamber;

[0010] There is an air outlet pipe connecting the upper part of the exhaust chamber to the blower. The blower has an air inlet, and an exhaust pipe is fixedly connected to the top of the exhaust chamber.

[0011] A motor is fixedly installed above the exhaust pipe. The output shaft of the motor is fixedly connected to a rotating rod, which is located inside the exhaust pipe. A spiral blade is fixedly installed at the lower end of the rotating rod.

[0012] Preferably, a blade is fixedly mounted on the rotating rod.

[0013] Preferably, a safety valve and a demisting screen are fixedly installed between the upper and lower layers of the emission chamber.

[0014] Preferably, the demisting net is located below the safety valve, and a channel is fixedly installed in the upper part of the discharge chamber, with a thin plate fixedly installed inside the channel.

[0015] Preferably, the thin plate is a series of fixed parallel plates or plates at a certain angle.

[0016] Preferably, a narrow gap is formed between the thin plates.

[0017] Preferably, the bottom of the discharge chamber is fixedly connected to four support legs.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] (1) The hydrogen-oxygen separation safety emission device for sodium hypochlorite preparation is used such that the hydrogen gas to be emitted enters the emission chamber through the connecting pipe. The droplets in contact with the inner wall are condensed in the lower layer of the emission chamber. The hydrogen gas is filtered through the demisting screen. When the gas in the lower layer of the emission chamber reaches the set pressure, the safety valve opens automatically. The hydrogen gas enters the upper layer of the emission chamber. The blower sends in a large amount of air to mix with the hydrogen gas. After the gas is mixed in the channel, it enters the exhaust pipe and is stirred and mixed evenly before being discharged into the atmosphere. The hydrogen gas is fully mixed with the air, which reduces the risk of explosion and improves the stability of production.

[0020] (2) The hydrogen-oxygen separation safety emission device for sodium hypochlorite preparation has a static mixing structure composed of a channel and a thin plate. The air and hydrogen supplied by the blower are initially separated, rotated and recombined in the channel to achieve efficient premixing without power, so that the hydrogen concentration is initially diluted to below the lower explosive limit. The spiral blades form strong turbulence in the exhaust pipe through mechanical stirring, breaking the local flow dead zone of static mixing, ensuring that the air and residual hydrogen are fully contacted, and finally forming a uniformly concentrated mixed gas. The two work in series to make up for the shortcomings of a single mixing method. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of a hydrogen-oxygen separation and safe emission device for sodium hypochlorite preparation according to the present invention;

[0023] Figure 2 This is a side view of a hydrogen-oxygen separation and safe emission device for sodium hypochlorite preparation according to the present invention;

[0024] Figure 3 This is a cross-sectional schematic diagram of a hydrogen-oxygen separation and safe emission device for sodium hypochlorite preparation according to this utility model;

[0025] Figure 4 This is a cross-sectional schematic diagram of a hydrogen-oxygen separation and safe emission device for sodium hypochlorite preparation according to this utility model.

[0026] Attached reference numerals: 1. Discharge chamber; 2. Valve; 3. Connecting pipe; 4. Support leg; 5. Blower; 6. Air inlet; 7. Air outlet pipe; 8. Exhaust pipe; 9. Paddle blade; 10. Motor; 11. Drain pipe; 12. Liquid storage tank; 13. Rotating rod; 14. Spiral blade; 15. Thin plate; 16. Channel; 17. Safety valve; 18. Demisting screen. Detailed Implementation

[0027] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. 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.

[0029] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Please see Figure 1-4 This utility model provides a technical solution: a safe emission device for hydrogen-oxygen separation in sodium hypochlorite preparation, including an emission chamber 1. The emission chamber 1 is divided into upper and lower layers. The upper layer of the emission chamber 1 is used for mixing air and diluting hydrogen, while the lower layer of the emission chamber 1 is used for condensation and filtration. A connecting pipe 3 is fixedly installed on one side of the emission chamber 1, which connects the sodium hypochlorite preparation equipment to the lower layer of the emission chamber 1. A valve 2 is fixedly installed on the connecting pipe 3. A storage tank 12 is provided on the other side of the emission chamber 1. A drain pipe 11 is fixedly connected to the bottom of the emission chamber 1. The lower layer of the emission chamber 1 and the storage tank 12 are connected by the drain pipe 11. Four support legs 4 are fixedly connected to the bottom of the emission chamber 1.

[0032] When valve 2 is opened, a large amount of hydrogen generated during the preparation of sodium hypochlorite enters the lower layer of the discharge chamber 1 through the connecting pipe 3. The lower layer of the discharge chamber 1 is shaped like a frustum, which facilitates the condensation of other substances along with the hydrogen and their flow to the bottom of the discharge chamber 1 under the action of gravity. The hydrogen is then collected by the drain pipe 11 and enters the storage tank 12, thus avoiding contamination and damage to the equipment and facilitating recycling and reuse.

[0033] An exhaust pipe 7 is fixedly connected to the top of the exhaust chamber 1. A blower 5 is placed around the exhaust chamber 1. An exhaust pipe 7 connects the upper part of the exhaust chamber 1 and the blower 5. An air inlet 6 is opened on the blower 5. An exhaust pipe 8 is fixedly connected to the top of the exhaust chamber 1. A motor 10 is fixedly installed above the exhaust pipe 8. A rotating rod 13 is fixedly connected to the output shaft of the motor 10. The rotating rod 13 is located inside the exhaust pipe 8. A blade 9 is fixedly installed on the rotating rod 13. A spiral blade 14 is fixedly installed at the lower end of the rotating rod 13.

[0034] When the motor 10 is started, the output shaft of the motor 10 drives the rotating rod 13 to rotate. The blade 9 on the rotating rod 13 rotates to start exhausting gas. The blade 9 at the end of the exhaust pipe 8 can accelerate the gas flow and exhaust gas faster. The spiral blade 14 fixed to the rotating rod 13 also starts to rotate. The torsion angle and spacing of the spiral blade 14 are precisely designed so that the gas can flow along the spiral path in the exhaust pipe 8, thereby achieving the mixing effect.

[0035] A safety valve 17 and a demisting net 18 are fixedly installed between the upper and lower layers inside the discharge chamber 1. The demisting net 18 is located below the safety valve 17. A channel 16 is fixedly installed in the upper layer inside the discharge chamber 1, and a thin plate 15 is fixedly installed inside the channel 16.

[0036] The thin plates 15 are a series of fixed parallel or angled plates, forming narrow gaps between them. When the gas flows in the channel 16, static mixing is achieved through the blocking and guiding effect of the thin plates 15. Combined with the spiral plate 14 above it, the hydrogen is diluted and mixed more evenly.

[0037] Safety valve 17 uses the elastic force of a spring to balance the pressure in the system and conducts one-way flow to prevent backflow. This structure and principle are similar to existing spring-type safety valve devices in this field and are well known to those skilled in the art, so its internal structure will not be described in detail.

[0038] The working principle of the defogging net 18 is mainly to use inertial collision, interception, diffusion and other effects to make the fog droplets come into contact with the net and be captured. The fog droplets captured by the defogging net 18 will gradually gather into larger droplets under the action of gravity, and then flow down along the surface of the net wires and finally be discharged from the defogging net 18, thereby achieving the purpose of removing fog droplets.

[0039] Blower 5 uses a high-speed rotating impeller to give the gas centrifugal force, thereby increasing the gas pressure and flow rate. The structure and principle of blower 5 are similar to existing centrifugal blower equipment in this field and are well known to those skilled in the art, so its internal structure will not be described in detail.

[0040] Working principle: When in use, the hydrogen gas to be discharged enters the discharge chamber 1 through the connecting pipe 3. First, the mist droplets in contact with the inner wall of the lower layer of the discharge chamber 1 are condensed. The hydrogen gas is filtered through the demisting screen 18. When the gas in the lower layer of the discharge chamber 1 reaches the set pressure, the safety valve 17 automatically opens, and the hydrogen gas enters the upper layer of the discharge chamber 1. The blower 5 sends in a large amount of air to mix with the hydrogen gas. After the gas is mixed in the channel 16, it enters the exhaust pipe 8 and is stirred and mixed evenly before being discharged into the atmosphere. The hydrogen gas is fully mixed with the air, which reduces the risk of explosion and improves production stability.

[0041] The demisting net 18 efficiently captures sodium hypochlorite droplets entrained in hydrogen gas, preventing corrosion and crystallization blockage of subsequent pipelines by wet chlorine gas and salt solution, thus extending equipment life. The safety valve 17 monitors system pressure in real time to prevent excessive pressure and makes automatic hydrogen discharge more convenient, preventing backflow that could cause equipment explosion. Together with the demisting net 18, they form a dual safety barrier of gas-liquid separation and pressure control.

[0042] The channel 16 and the thin plate 15 are combined to form a static mixing structure, in which the air and hydrogen delivered by the blower 5 are initially separated, rotated and recombined in the channel 16 to achieve efficient premixing without power, so that the hydrogen concentration is initially diluted to below the lower explosive limit. The spiral blade 14 forms strong turbulence in the exhaust pipe 8 through mechanical stirring, breaking the local flow dead zone of static mixing, ensuring that the air and residual hydrogen are fully in contact, and finally forming a uniformly concentrated mixed gas. The two work in series to make up for the shortcomings of a single mixing method.

[0043] The present invention has been described in detail, but it is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A sodium hypochlorite production hydrogen-oxygen separation safety discharge device comprising a discharge chamber (1), characterized in that: The interior of the discharge chamber (1) is divided into upper and lower layers. A connecting pipe (3) is fixedly installed on one side of the discharge chamber (1). The connecting pipe (3) connects the sodium hypochlorite preparation equipment to the lower layer of the discharge chamber (1). A valve (2) is fixedly installed on the connecting pipe (3). A storage tank (12) is provided on the other side of the discharge chamber (1). A drain pipe (11) is fixedly connected to the bottom of the discharge chamber (1). The lower layer of the discharge chamber (1) and the storage tank (12) are connected by the drain pipe (11). An exhaust pipe (7) is fixedly connected to the top of the exhaust chamber (1), and a blower (5) is placed around the exhaust chamber (1). An exhaust pipe (7) is connected between the upper part of the exhaust chamber (1) and the blower (5). An air inlet (6) is provided on the blower (5). An exhaust pipe (8) is fixedly connected above the exhaust chamber (1). A motor (10) is fixedly installed above the exhaust pipe (8). The output shaft of the motor (10) is fixedly connected to a rotating rod (13). The rotating rod (13) is located inside the exhaust pipe (8). A spiral blade (14) is fixedly installed at the lower end of the rotating rod (13).

2. The device for safe discharge of hydrogen and oxygen separated during the production of sodium hypochlorite according to claim 1, characterized in that: A blade (9) is fixedly installed on the rotating rod (13).

3. The device for safe discharge of hydrogen and oxygen separated from the production of sodium hypochlorite according to claim 2, characterized in that: A safety valve (17) and a demisting net (18) are fixedly installed between the upper and lower layers of the discharge chamber (1).

4. The hydrogen-oxygen separation and safe emission device for sodium hypochlorite preparation according to claim 3, characterized in that: The demisting net (18) is located below the safety valve (17), and a channel (16) is fixedly installed on the upper part of the discharge chamber (1), and a thin plate (15) is fixedly installed inside the channel (16).

5. The device for safe discharge of hydrogen and oxygen separated from the production of sodium hypochlorite according to claim 4, characterized in that: The thin plate (15) is a series of fixed parallel plates or plates at a certain angle.

6. The device for safe discharge of oxygen and hydrogen separated for sodium hypochlorite production according to claim 5, characterized in that: Narrow gaps are formed between the thin plates (15).

7. The device for safe discharge of hydrogen and oxygen separated from the production of sodium hypochlorite according to claim 6, characterized in that: The bottom of the discharge chamber (1) is fixedly connected to four support legs (4).

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