Hydrogen generator

Abstract

The hydrogen generator comprises a shell, an electrolytic bath, an electrolyte barrel, a gas-liquid separator and a purification device, the electrolytic bath, the electrolyte barrel, the gas-liquid separator and the purification device are installed in the shell, a diaphragm of the electrolytic bath is an anion exchange membrane, and the electrolytic bath is provided with a first liquid inlet end, a first liquid outlet end and a first gas outlet end; the electrolyte barrel is provided with a second liquid inlet end, a second liquid outlet end, a liquid injection port and a second gas outlet end, the first liquid inlet end is communicated with the second liquid outlet end through a pipeline, the first liquid outlet end is communicated with the second liquid inlet end through a pipeline, and the second gas outlet end is used for discharging oxygen; the gas-liquid separator is provided with a first gas inlet end, a liquid discharge end and a third gas outlet end, the first gas inlet end is communicated with the first gas outlet end through a pipeline, and the liquid discharge end is used for discharging liquid separated by the gas-liquid separator; the purification device is provided with a second gas inlet end and a fourth gas outlet end, and the third gas outlet end is communicated with the second gas inlet end through a pipeline. The device has the advantages of being high in production efficiency, easy to maintain, compact in structure, good in stability and high in adaptability.

Description

Technical Field

[0001] The present application belongs to the technical field of hydrogen preparation, and in particular relates to a hydrogen generator. Background Art

[0002] Water electrolysis is an efficient way to produce high-purity hydrogen. The principles of water electrolysis hydrogen generators in related technologies are mainly based on two routes: alkaline electrolysis of water (ALK) and proton membrane electrolysis of water (PEM). Alkaline tank hydrogen generators generally use concentrated alkali as the electrolyte. Since the electrolyte they use is generally a 30% mass concentration potassium hydroxide solution, this requires their system support components to have stronger resistance to alkali corrosion, which will lead to rapid life decay and increased maintenance costs in the later stages of use. Alkaline hydrogen generators have poor performance and low efficiency at room temperature or low temperature conditions. The lower current density results in a larger volume at the same flow rate, which increases the consumption of materials and makes it difficult to move them conveniently. Alkaline tank hydrogen generators have disadvantages such as low efficiency, high corrosion, operating temperature limitations, and low gas purity. In PEM electrolyzer hydrogen generators, which use proton exchange membrane technology, the acidic catalytic system requires precious metal catalysts such as platinum, iridium, and titanium. Due to the stability of these precious metal catalysts, PEM hydrogen generators have high water quality requirements. PEM hydrogen generators have the disadvantages of high cost and poor stability.

[0003] Therefore, there is an urgent need to provide a technical solution that can overcome the two technical defects, has the characteristics of low cost and high water electrolysis efficiency, and solve the problems in the existing hydrogen generator. Utility Model Content

[0004] An embodiment of the present application provides a hydrogen generator, in which an electrolytic cell is provided and an anion exchange membrane is used as a hydrogen source. The hydrogen generated in the electrolytic cell is separated by a gas-liquid separator and then dried by a purification device to prepare dry and highly pure hydrogen, thereby achieving the technical effect of low hydrogen processing cost and high water electrolysis efficiency.

[0005] The present invention provides a hydrogen generator comprising:

[0006] An electrolytic cell, the electrolytic cell comprising an anion exchange membrane, the electrolytic cell having a first liquid inlet end, a first liquid outlet end, and a first gas outlet end;

[0007] an electrolyte barrel, the electrolyte barrel having a second liquid inlet, a second liquid outlet, a liquid injection port, and a second gas outlet, the first liquid inlet and the second liquid outlet being connected via a pipeline, the first liquid outlet and the second liquid inlet being connected via a pipeline, and the second gas outlet being used to discharge oxygen;

[0008] A gas-liquid separator, wherein the gas-liquid separator is provided with a first gas inlet end, a liquid discharge end, and a third gas outlet end, the first gas inlet end is connected to the first gas outlet end through a pipeline, and the liquid discharge end is used to discharge the liquid separated by the gas-liquid separator;

[0009] A purification device, wherein the purification device is provided with a second air inlet and a fourth air outlet, and the third air outlet is connected to the second air inlet via a pipeline;

[0010] The electrolytic cell, the electrolyte barrel, the gas-liquid separator and the purification device are installed in the shell.

[0011] Optionally, also include:

[0012] A power supply is electrically connected to the electrolytic cell, the power supply is disposed in the shell, and the power supply is configured to supply power to the electrolytic cell.

[0013] Optionally, the gas-liquid separator includes:

[0014] A separator body, wherein the first air inlet end, the liquid discharge end, and the third air outlet end are arranged on the separator body, and along the axial direction of the separator body, the third air outlet end and the liquid discharge end are arranged opposite to each other;

[0015] A filter element is disposed in the separator body, and the filter element is disposed opposite to the first air inlet end;

[0016] The gas-liquid separation mechanism is arranged in the separator body, and the gas-liquid separation mechanism is arranged opposite to the third gas outlet end.

[0017] Optionally, the gas-liquid separation mechanism includes a cyclone plate, a demister and a guide tube, the guide tube and the demister are fixedly connected to the separator body respectively, the cyclone plate is circumferentially installed on the guide tube, and the demister is closer to the third air outlet end than the guide tube.

[0018] Optionally, the gas-liquid separator further includes a drain pipe connected to the drain end, and a drain valve is provided on the drain pipe.

[0019] Optionally, the drain pipe includes a first section and a second section that are connected, the first section is located between the drain end and the drain valve, the second section is located on the side of the drain valve away from the drain end, and the diameter of the first section is larger than the diameter of the second section.

[0020] Optionally, the diameter of the first section is D1 and the diameter of the second section is D2, D1 = a*D2, where 1.6≤a≤8;

[0021] and / or, 4 mm ≤ D1 ≤ 8 mm;

[0022] and / or, 1.0mm≤D2≤2.5mm.

[0023] Optionally, a liquid level detection device is provided in the separator body, and the liquid level detection device is configured to detect a liquid level value in the separator body;

[0024] The control module, the liquid level detection device and the drain valve are respectively connected to the control module, and the control module is configured as follows:

[0025] receiving the liquid level value generated by the liquid level detection device;

[0026] The discharge valve is controlled to open or close the discharge pipe according to the liquid level value.

[0027] Optionally, also include:

[0028] a pressure switch, arranged on the gas outlet pipeline connected to the fourth gas outlet end, the pressure switch being configured to detect the pressure value in the purification device and the gas outlet pipeline (430);

[0029] A control module, wherein the pressure switch is connected to the control module, and the control module is configured to:

[0030] The pressure switch is controlled to transmit a signal to a control module according to the pressure value, so as to control the power supply to be cut off or supplied.

[0031] Optionally, a first one-way valve and / or a safety valve is further provided on the air outlet pipeline.

[0032] Optionally, also include:

[0033] a flow display module, provided on the gas outlet pipeline connected to the fourth gas outlet end, for displaying the flow value of the hydrogen gas flowing out of the purification device;

[0034] And / or, a pressure display module is provided on the gas outlet pipeline connected to the fourth gas outlet end, and is used to display the gas pressure value in the purification device.

[0035] Optionally, a second one-way valve is provided on the pipeline connecting the first liquid outlet and the second liquid inlet.

[0036] Optionally, the concentration C of the alkaline substance in the electrolyte in the electrolytic cell is 0.1 mol / L≤C≤2 mol / L.

[0037] Optionally, a heat dissipation device is further provided in the housing.

[0038] The hydrogen generator provided in the embodiment of the present application includes an electrolytic cell, an electrolyte tank, a gas-liquid separator and a purification device integrated in a shell. The electrolytic cell and the electrolyte tank form an electrolyte circulation. The diaphragm of the electrolytic cell adopts an anion exchange membrane, which has low requirements for water quality and can improve water electrolysis efficiency, reduce equipment investment and maintenance costs. The hydrogen generated by the electrolytic cell is separated by the gas-liquid separator and then dried by the purification device to prepare dry and highly pure hydrogen, achieving the advantages of high production efficiency, simple maintenance, compact structure, good stability and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0040] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0041] Figure 1 This is a schematic diagram of the principle of the hydrogen generator provided in an embodiment of the present application.

[0042] Figure 2 This is a schematic diagram of the structure of the hydrogen generator provided in an embodiment of the present application.

[0043] Figure 3 This is a schematic structural diagram of the gas-liquid separator in the hydrogen generator provided in an embodiment of the present application.

[0044] Figure 4 This is a control block diagram of the hydrogen generator provided in an embodiment of the present application.

[0045] Figure 5 This is a schematic diagram of the electrolyzer in the hydrogen generator improved in the embodiment of the present application. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0047] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the principle of the hydrogen generator provided in the embodiment of the present application. Figure 2 This is a schematic structural diagram of a hydrogen generator provided in an embodiment of the present application. The embodiment of the present application provides a hydrogen generator 10, comprising an electrolytic cell 100, an electrolyte tank 200, a gas-liquid separator 300, a purification device 400, and a housing 500.

[0048] In this embodiment, see Figure 1 and Figure 5 The electrolytic cell 100 is an anion exchange membrane electrolytic cell. Exemplarily, the electrolytic cell 100 is provided with a first liquid inlet 110, a first liquid outlet 120, and a first gas outlet 130. An anion exchange membrane 140, a catalyst layer 150, a gas diffusion layer 160, an anode plate 170, and a cathode plate 180 are provided within the electrolytic cell 100. The anode plate 170 and the cathode plate 180 are disposed opposite each other, with the anion exchange membrane 140, the catalyst layer 150, and the gas diffusion layer 160 located between the anode plate 170 and the cathode plate 180. Catalyst layers 150 are provided on both sides of the anion exchange membrane 140, and a gas diffusion layer 160 is provided on the side of the catalyst layer 150 facing away from the anion exchange membrane 140. The catalyst layer 150 is a non-precious metal such as nickel. The electrolyte enters the electrolytic cell 100 from the first liquid inlet 110, and the electrolyte may be a 5% wt alkaline solution. When a potential is applied to the electrolytic cell 100, an oxygen evolution reaction (OER: 2OH-2e - →1 / 2O2+H2O, hydrogen evolution reaction occurs on the cathode plate 180 side (HER: 2H2O+2e - →H2+2OH - ), the anion exchange membrane 140 is selective and only allows anions to pass through, preventing cations from being transmitted. The fast ion transmission channel provided by the anion exchange membrane 140 can improve the reaction efficiency. The hydrogen generated by the electrolyte after electrocatalysis is discharged from the first gas outlet 130 on the electrolyzer 100. The electrolyzer 100 in the embodiment of the present application can improve the reaction efficiency. The electrolyzer 100 usually requires a higher potential to realize the electrolysis process, and the zero-gap design of the anion exchange membrane 140 can reduce the reaction energy consumption to achieve high performance and high efficiency. The reaction process can also be precisely controlled by adjusting the potential or current density. The electrolyzer 100 has the advantages of high efficiency, low cost and low water quality requirements.

[0049] In this embodiment, see Figure 1The electrolyte barrel 200 is used to store electrolyte and has a second liquid inlet 210, a second liquid outlet 220, a liquid injection port 230, and a second gas outlet 240. The first liquid inlet 110 and the second liquid outlet 220 are connected by a pipeline, and the first liquid outlet 120 and the second liquid inlet 210 are connected by a pipeline, forming an electrolyte circulation system. Oxygen generated during the electrolysis of the electrolyte is discharged from the second gas outlet 240. Electrolyte can be replenished in the electrolyte barrel 200 through the liquid injection port 230. In addition, the electrolyte barrel 200 can also be provided with an emptying port for emptying the electrolyte in the electrolyte barrel 200.

[0050] In this embodiment, see Figure 1 The gas-liquid separator 300 is provided with a first gas inlet end 310, a liquid discharge end 320, and a third gas outlet end 330. The first gas inlet end 310 is connected to the first gas outlet end 130 via a pipeline. The hydrogen generated by the electrolytic cell 100 is discharged through the first gas outlet end 130 and enters the gas-liquid separator 300 from the first gas inlet end 310. The gas-liquid separator 300 separates the trace water vapor mixed in the hydrogen, and the separated liquid is discharged from the liquid discharge end 320. The liquid discharge end 320 can be connected to the electrolyte tank 200 for reuse, or it can be connected to a waste liquid tank.

[0051] In this embodiment, see Figure 1 Purification device 400 is provided with a second gas inlet 410 and a fourth gas outlet 420. Third gas outlet 330 is connected to second gas inlet 410 via a pipeline. Fourth gas outlet 420 is used to discharge hydrogen. Purification device 400 includes multiple molecular sieves. After separation by gas-liquid separator 300, hydrogen enters purification device 400 for drying, adsorption of impurities, and removal of oxygen, thereby producing dry, high-purity hydrogen.

[0052] In this embodiment, see Figure 2 The housing 500 is a rectangular box structure, and the electrolytic cell 100, the electrolyte tank 200, the gas-liquid separator 300, and the purification device 400 are installed in the housing 500. The housing 500 integrates the electrolytic cell 100, the electrolyte tank 200, the gas-liquid separator 300, and the purification device 400 into one body, making the hydrogen generator 10 compact, lightweight, and highly portable.

[0053] As will be appreciated, the hydrogen generator in this embodiment includes an electrolytic cell 100, an electrolyte tank 200, a gas-liquid separator 300, and a purification device 400, all integrated within a housing 500. The electrolytic cell 100 and the electrolyte tank 200 form an electrolyte circulation system. The diaphragm of the electrolytic cell 100 utilizes an anion exchange membrane. The electrolyte is electrolyzed by the anion exchange membrane and the catalyst to produce high-purity hydrogen, resulting in high electrolysis efficiency. The anion exchange membrane has low requirements for electrolyte water quality, allowing the use of pure water, reducing equipment investment and maintenance costs. This offers the advantages of high efficiency, low cost, and low water quality requirements.

[0054] In some embodiments, see Figure 2 The hydrogen generator 10 further includes a power supply 600 , which is electrically connected to the electrolyzer 100 and disposed within the housing 500 . The power supply 600 is configured to supply power to the electrolyzer. The power supply 600 is a DC power supply. Integrating the power supply 600 within the housing 500 facilitates the overall transfer of the hydrogen generator 10 , improving portability and widening its applicability. Alternatively, the power supply 600 may be disposed outside the housing 500 .

[0055] In some embodiments, see Figure 3 The gas-liquid separator 300 includes a separator body 340 , a filter element 350 and a gas-liquid separation mechanism 360 .

[0056] In this embodiment, the separator body 340 is a cylindrical barrel made of 316 stainless steel, which is resistant to strong alkali. This ensures the processing flow of the gas-liquid separator and increases the gas storage volume. The separator body 340 has an inner diameter of 40 mm and a height of 80 mm, making it relatively small in overall size. The first air inlet end 310, the liquid discharge end 320, and the third air outlet end 330 are disposed on the separator body 340. The first air inlet end 310 is disposed on the side wall of the separator body 340, and the third air outlet end 330 and the liquid discharge end 320 are disposed relative to each other, such as along the axis of the barrel, with the third air outlet end 330 disposed at the top of the barrel and the liquid discharge end 320 disposed at the bottom of the barrel. A filter element 350 is disposed within the separator body 340, and the filter element 350 is disposed relative to the first air inlet end 310. The filter element 350 can be a high-mesh filter and can be made of an alkali-resistant material such as stainless steel. The filter has a mesh size of 40 to 80 and completely covers the first air inlet 310. Hydrogen entering from the first air inlet 310 is filtered by the filter before entering the separator body 340. Hydrogen electrolyzed in the electrolytic cell 100 passes through the filter element 350 for preliminary water vapor separation. A gas-liquid separation mechanism 360 is disposed within the separator body 340 and is positioned opposite the third air outlet 330. After water vapor separated by the filter element 350 is completely separated by the gas-liquid separation mechanism 360, hydrogen is discharged from the third air outlet 330. The gas-liquid separation mechanism 360 is made of an alkali-resistant material, such as stainless steel.

[0057] In some embodiments, see Figure 3 The gas-liquid separation mechanism 360 includes a cyclone plate 361, a demister 362 and a guide tube 363. The guide tube 363 and the demister 362 are fixedly connected to the separator body 340 respectively. The cyclone plate 361 is circumferentially installed on the guide tube 363. The demister 362 is closer to the third gas outlet end 330 than the guide tube 363.

[0058] In this embodiment, see Figure 3 The demister 362 includes a mounting plate and multiple corrugated plates. The mounting plate is fixedly connected to the separator body 340. The multiple corrugated plates are vertically arranged at equal intervals, forming channels for gas to pass between adjacent corrugated plates. The channels formed by the corrugated plates are also wavy. When gas is discharged through the channels, gas and liquid molecules collide with the corrugated plates, condensing and dripping onto the plates, achieving gas-liquid separation with good separation effect.

[0059] In this embodiment, see Figure 3The guide tube 363 is a through-cylindrical structure, coaxially arranged with the separator body 340. A connection portion is provided at one end of the guide tube 363, near the third gas outlet 330, through which it is fixedly connected to the inner wall of the separator body 340. A constriction is provided at the other end of the guide tube 363 to ensure the passage of gas while condensing the gas and liquid molecules in the gas as much as possible.

[0060] In this embodiment, see Figure 3 The cyclone plate 361 is a plate that spirals upward along the axis of the guide tube 363. It is fixedly connected to the outer wall of the guide tube 363 and is positioned perpendicular to the axis of the guide tube 363. As gas spirals upward along the cyclone plate 361, the gas and liquid molecules in the gas collide with the cyclone plate 361, condensing and dripping, achieving gas-liquid separation.

[0061] As will be appreciated, in this embodiment, the gas-liquid separation mechanism 360 includes a cyclone plate 361, a demister 362, and a guide tube 363, achieving three-stage gas-liquid separation. Airflow enters the separator body 340 tangentially through the first air inlet 310 and moves within the spaces outside and inside the guide tube 363. Gas outside the guide tube 363 flows through the plate body of the cyclone plate 361. The gas undergoes a rotational centrifugal motion, and the inertial centrifugal force separates larger droplets from the gas, achieving primary gas-liquid separation. Due to the difference in specific gravity between the gas and liquid, the gas moves upward along the inside of the guide tube 363. During this upward motion, the airflow is affected by gravity, causing the upward velocity of slightly larger droplets to decrease, ultimately leading to a downward velocity, achieving secondary gas-liquid separation. After secondary gas-liquid separation, the gas continues to flow upward through the demister 362, achieving tertiary gas-liquid separation. Hydrogen produced through multi-stage gas-liquid separation achieves better separation efficiency and higher purity.

[0062] In some embodiments, see Figure 3 As shown, the gas-liquid separator 300 further includes a drain pipe 370 connected to the drain end 320, and a drain valve 380 is provided on the drain pipe 370. The drain valve 380 is used to control the drain pipe 370 to be open or closed, which is easy to operate.

[0063] Based on the above implementation, see Figure 3 As shown, the drain pipe 370 includes a first section 371 and a second section 372 that are connected. The first section 371 is located between the drain end 320 and the drain valve 380, and the second section 372 is located on the side of the drain valve 380 away from the drain end 320. The diameter of the first section 371 is larger than the diameter of the second section 372.

[0064] It can be understood that the drainage pipe 370 is designed to have two sections with different diameters. The diameter of the section close to the separator body 340 is larger than the diameter of the other end, and the drainage flow is stable, thereby achieving the purpose of noise reduction.

[0065] Based on the above implementation, see Figure 3 As shown, the diameter of the first section 371 is D1, and the diameter of the second section 372 is D2, where D1 = a*D2, where 1.6 ≤ a ≤ 8. The value of a can be 1.6, 2.5, 3.1, 4.0, 5.3, 6.8, 7.5, 8.0, or other values ​​not specified. The rational design of the inner diameter ratio between the first section 371 and the second section 372 achieves excellent noise reduction.

[0066] Based on the above implementation, see Figure 3 As shown, the diameter of the first section 371 is D1, 4mm≤D1≤8mm. The value of D1 can be 4mm, 4.6mm, 5.0mm, 5.5mm, 6.1mm, 7.0mm, 7.7mm, 8mm or other unspecified values.

[0067] Based on the above implementation, see Figure 3 As shown, the diameter of the second section 372 is D2, 1.0 mm ≤ D2 ≤ 2.5 mm. The value of D1 can be 1.0 mm, 1.3 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.5 mm or other unspecified values.

[0068] In this embodiment, the diameters of the first section 371 and the second section 372 are relatively small, which can achieve good noise reduction while satisfying the drainage requirements.

[0069] Based on the above implementation, see Figure 3 and Figure 4 As shown, the hydrogen generator 10 further includes a liquid level detection device 390 and a control module 700. The liquid level detection device 390 is disposed within the separator body 340. The liquid level detection device 390 can be a liquid level gauge configured to detect the liquid level within the separator body 340. The control module 700 is a controller, such as a PLC microcontroller, a printed circuit board, or the like. The liquid level detection device 390 and the drain valve 380 are each connected to the control module 700. The control module 700 is configured to receive the liquid level value generated by the liquid level detection device 390 and control the operation of the drain valve 380 to open or close the drain pipe 370 based on the liquid level value. For example, control module 700 is configured with a first liquid level threshold and a second liquid level threshold, wherein the first liquid level threshold is greater than the second liquid level threshold. When the detected liquid level exceeds the first liquid level threshold, control module 700 controls drain valve 380 to open drain pipe 370 and discharge the separated liquid. When the detected liquid level falls below the second liquid level threshold, control module 700 controls drain valve 380 to close drain pipe 370 and stop discharging the liquid. Automatically controlling the opening or closing of drain valve 380 based on the liquid level provides simple operation and a high degree of automation.

[0070] In some embodiments, see Figure 1 and Figure 2 As shown, the hydrogen generator further includes a flow display module 800, which can be a flow meter. The flow display module 800 is disposed on the outlet pipe 430 connected to the fourth outlet port 420 and is used to display the flow value of the hydrogen flowing out of the purification device 400.

[0071] In some embodiments, see Figure 1 and Figure 2 As shown, the hydrogen generator further includes a pressure display module 900 , which can be a pressure gauge. The pressure display module 900 is disposed on the gas outlet pipe 430 connected to the fourth gas outlet port 420 , and is used to display the gas pressure value in the purification device 400 .

[0072] By arranging the flow display module 800 and the pressure display module 900 on the gas outlet pipeline 430 , the flow rate change and pressure change of the hydrogen generator can be displayed in real time, which is intuitive and can meet the different needs of users.

[0073] In some embodiments, see Figure 1 and Figure 4 As shown, the hydrogen generator further includes a pressure switch 440 and a control module 700. The pressure switch 440 has a pressure detection function. The pressure switch 440 is disposed on the gas outlet pipeline 430 connected to the fourth gas outlet port 420. The pressure switch 440 is configured to detect the pressure within the purification device 400 and the gas outlet pipeline 430. The pressure switch 440 is connected to the control module 700. The control module 700 is configured to control the pressure switch 440 to transmit a signal to the control module 700 based on the pressure value, thereby controlling whether the power supply 600 is powered on or off.

[0074] Exemplarily, a pressure threshold is provided within the control module 700, and the pressure threshold includes an upper pressure threshold and a lower pressure threshold. When the pressure switch 440 detects that the pressure value exceeds the upper pressure threshold, the control module 700 controls the pressure switch 440 to open and controls the power supply 600 to cut off the power, thereby preventing the electrolyzer 100 from continuously operating and causing excessive pressure, thereby ensuring the safety and service life of the hydrogen generator. When the pressure switch 440 detects that the pressure value is lower than the lower pressure threshold, the control module 700 controls the power supply 600 to supply power, and the electrolyzer 100 resumes operation, thereby ensuring the continuity of hydrogen production and the safety and service life of the product. When the pressure value detected by the pressure switch 440 is between the upper pressure threshold and the lower pressure threshold, the control module 700 controls the power supply 600 to stop supplying power.

[0075] In some embodiments, see Figure 1As shown, a first one-way valve 460 is further provided on the gas outlet pipe 430 to prevent hydrogen backflow and ensure the purity of the hydrogen generated by the hydrogen generator.

[0076] In some embodiments, see Figure 1 As shown, a safety valve 470 is further provided on the gas outlet pipe 430. When the pressure value exceeds the set pressure, the safety valve 470 opens to release the pressure, thereby ensuring the safety of the hydrogen generator.

[0077] In some embodiments, see Figure 1 As shown, a second one-way valve 250 is provided on the pipeline connecting the first liquid outlet 120 and the second liquid inlet 210. By providing the second one-way valve 250, the electrolyte in the electrolyte barrel 200 is prevented from flowing back into the electrolytic cell 100.

[0078] In some embodiments, the concentration C of the alkaline substance in the electrolyte in the electrolytic cell 100 is such that 0.1 mol / L≤C≤2 mol / L. The value of C may be 0.1 mol / L, 0.5 mol / L, 1.0 mol / L, 1.2 mol / L, 1.5 mol / L, 1.9 mol / L, 2 mol / L, or other values ​​not specified.

[0079] In this embodiment, the alkaline concentration of the electrolyte required by electrolytic cell 100 is relatively low, the acid and alkalinity resistance requirements of the materials required for electrolytic cell 100 are low, and the equipment investment and maintenance costs are low. In addition, the voltage of electrolytic cell 100 is between 1.85V and 2.0V, which requires a low voltage and reduces energy consumption.

[0080] In some embodiments, see Figure 2 As shown, a heat dissipation device 510 is further provided in the housing 500. The heat dissipation device 510 is a fan, and one or more fans can be provided. The fans can be placed near the electrolytic cell 100 and the control module 700 to dissipate heat from the main heat-generating components, thereby reducing the temperature in the housing 500 and improving the electrolysis efficiency.

[0081] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0082] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features.

[0083] The above is a detailed introduction to the hydrogen generator provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A hydrogen generator, characterized in that: include: An electrolytic cell (100), the electrolytic cell (100) comprising an anion exchange membrane (140), the electrolytic cell (100) having a first liquid inlet (110), a first liquid outlet (120), and a first gas outlet (130); An electrolyte barrel (200), the electrolyte barrel (200) having a second liquid inlet end (210), a second liquid outlet end (220), a liquid injection port (230), and a second gas outlet end (240), the first liquid inlet end (110) and the second liquid outlet end (220) being in communication with each other through a pipeline, the first liquid outlet end (120) and the second liquid inlet end (210) being in communication with each other through a pipeline, and the second gas outlet end (240) being used for discharging oxygen; A gas-liquid separator (300), the gas-liquid separator (300) being provided with a first gas inlet end (310), a liquid discharge end (320), and a third gas outlet end (330), the first gas inlet end (310) being connected to the first gas outlet end (130) via a pipeline, and the liquid discharge end (320) being used to discharge liquid separated by the gas-liquid separator (300); A purification device (400), wherein the purification device (400) is provided with a second air inlet end (410) and a fourth air outlet end (420), and the third air outlet end (330) is connected to the second air inlet end (410) through a pipeline; The shell (500) contains the electrolytic cell (100), the electrolyte tank (200), the gas-liquid separator (300) and the purification device (400).

2. The hydrogen generator according to claim 1, characterized in that Also includes: A power supply (600) is electrically connected to the electrolytic cell (100). The power supply (600) is disposed in the housing (500). The power supply (600) is configured to supply power to the electrolytic cell.

3. The hydrogen generator according to claim 2, characterized in that: The gas-liquid separator (300) comprises: A separator body (340), wherein the first air inlet end (310), the liquid discharge end (320) and the third air outlet end (330) are arranged on the separator body (340), and along the axial direction of the separator body (340), the third air outlet end (330) and the liquid discharge end (320) are arranged opposite to each other; a filter element (350) disposed in the separator body (340), the filter element (350) being disposed opposite to the first air inlet end (310); The gas-liquid separation mechanism (360) is arranged in the separator body (340), and the gas-liquid separation mechanism (360) is arranged opposite to the third gas outlet end (330).

4. The hydrogen generator according to claim 3, characterized in that The gas-liquid separation mechanism (360) comprises a cyclone plate (361), a demister (362) and a guide tube (363); the guide tube (363) and the demister (362) are respectively fixedly connected to the separator body (340); the cyclone plate (361) is circumferentially mounted on the guide tube (363); and the demister (362) is closer to the third gas outlet end (330) than the guide tube (363).

5. The hydrogen generator according to claim 3, characterized in that: The gas-liquid separator (300) further comprises a liquid discharge pipe (370) in communication with the liquid discharge end (320), and a liquid discharge valve (380) is provided on the liquid discharge pipe (370).

6. The hydrogen generator according to claim 5, characterized in that The liquid discharge pipe (370) comprises a first section (371) and a second section (372) which are connected to each other. The first section (371) is located between the liquid discharge end (320) and the liquid discharge valve (380), and the second section (372) is located on the side of the liquid discharge valve (380) away from the liquid discharge end (320). The diameter of the first section (371) is larger than the diameter of the second section (372).

7. The hydrogen generator according to claim 6, characterized in that The diameter of the first section (371) is D1 and the diameter of the second section (372) is D2, D1=a*D2, wherein 1.6≤a≤8; and / or, 4 mm ≤ D1 ≤ 8 mm; and / or, 1.0mm≤D2≤2.5mm.

8. The hydrogen generator according to claim 5, characterized in that Also includes: a liquid level detection device (390), disposed in the separator body (340), the liquid level detection device (390) being configured to detect a liquid level value in the separator body (340); The control module (700), the liquid level detection device (390) and the drain valve (380) are respectively connected to the control module (700), and the control module (700) is configured as follows: receiving the liquid level value generated by the liquid level detection device (390); The discharge valve (380) is controlled to operate according to the liquid level value to open or close the discharge pipe (370).

9. The hydrogen generator according to any one of claims 2 to 8, characterized in that: Also includes: a pressure switch (440), disposed on an air outlet pipeline (430) connected to the fourth air outlet end (420), the pressure switch (440) being configured to detect pressure values ​​within the purification device (400) and the air outlet pipeline (430); A control module (700), wherein the pressure switch (440) is connected to the control module (700), and the control module (700) is configured to: According to the pressure value, the pressure switch (440) is controlled to transmit a signal to the control module (700) to control the power supply (600) to cut off or supply power.

10. The hydrogen generator according to claim 9, characterized in that: The gas outlet pipeline (430) is further provided with a first one-way valve (460) and / or a safety valve (470).

11. The hydrogen generator according to any one of claims 1 to 8, characterized in that: Also includes: a flow display module (800), provided on the gas outlet pipeline (430) connected to the fourth gas outlet end (420), for displaying the flow value of the hydrogen gas flowing out of the purification device (400); And / or, a pressure display module (900) is provided on the gas outlet pipeline (430) connected to the fourth gas outlet end (420), and is used to display the gas pressure value in the purification device (400).

12. The hydrogen generator according to any one of claims 1 to 8, characterized in that: A second one-way valve (250) is provided on the pipeline connecting the first liquid outlet (120) and the second liquid inlet (210).

13. The hydrogen generator according to any one of claims 1 to 8, characterized in that: The concentration C of the alkaline substance in the electrolyte in the electrolytic cell (100) is 0.1 mol / L≤C≤2 mol / L.

14. The hydrogen generator according to any one of claims 1 to 8, characterized in that: A heat dissipation device (510) is also provided in the housing (500).

Images