Four-in-one integrated post-treatment device suitable for water electrolysis hydrogen production

Abstract

The invention relates to the technical field of industrial gas purification, and discloses a four-in-one integrated post-treatment device suitable for water electrolysis hydrogen production, the four-in-one integrated post-treatment device comprises a device shell, an inner cavity of the device shell is divided into a left cavity and a right cavity, an upper partition plate is installed on the upper side of the left cavity, a cyclone separator is installed on the lower portion of the upper partition plate, and a water inlet is formed in the lower portion of the upper partition plate; a center exhaust pipe and a gravity settling exhaust pipe are installed on the upper partition plate in a penetrating mode, the upper end of the center exhaust pipe and the upper end of the gravity settling exhaust pipe are jointly connected with a main pipe, the other end of the main pipe extends into the right cavity and is connected with a cooling coil, and the cooling coil is completely arranged in the cooling water cavity. And the lower end of the cooling coil extends to the bottom of the cooling water cavity and is opened to form a bubble release port. According to the invention, a gas-liquid separator, a washer, a cooler and a final gas-water separator which are mutually independent in the traditional process flow are organically integrated in one device through structural innovation and process reconstruction by utilizing the similarity of working principles of the gas-liquid separator, the washer, the cooler and the final gas-water separator, so that a plurality of treatment steps are continuously and efficiently carried out.

Description

Technical Field

[0001] This invention relates to the field of industrial gas purification technology, and more specifically, to a four-in-one integrated post-treatment device suitable for hydrogen production by water electrolysis. Background Technology

[0002] In hydrogen production processes involving water electrolysis (especially alkaline water electrolysis), the hydrogen gas exiting the electrolyzer typically contains alkali, water vapor, and a significant amount of heat, resulting in a high temperature. These impurities and the high temperature can adversely affect subsequent compression, storage, and use, and may even damage the equipment. Therefore, post-treatment of the hydrogen produced by the electrolyzer is essential. The core processes typically include: gas-liquid separation (to remove entrained alkali), cooling, washing (to further remove alkali mist and cool), and final gas-water separation (to remove condensate).

[0003] Currently, the industry standard for post-processing systems of electrolytic hydrogen typically employs a series of independent equipment combinations. The typical process flow and corresponding equipment are as follows: Step 1: Gas-liquid separation; Hydrogen first enters an independent gas-liquid separator, where most of the entrained alkaline droplets are separated from the gas. The separated alkaline solution is returned to the electrolyzer or alkaline circulation system, while the hydrogen proceeds to the next stage. Step 2: Cooling and washing; After preliminary separation, the hydrogen then enters an independent cooler (such as a shell-and-tube heat exchanger), where cooling water lowers the hydrogen temperature to near room temperature, causing a large amount of water vapor to condense. Next, to further remove trace amounts of alkaline mist and ensure gas cleanliness, the hydrogen enters an independent scrubber, where it comes into direct contact with sprayed cold water for washing and deep cooling. Step 3: Final gas-liquid separation; The cooled and washed wet saturated hydrogen from the scrubber finally enters an independent gas-liquid separator (usually a baffle or centrifugal separator), separating the liquid water droplets carried by the hydrogen during cooling and washing, thus obtaining a pure hydrogen product with the required dryness.

[0004] Appendix Figure 4 The diagram shown is a process flow chart of the existing technical solution, but this existing technical solution has the following significant drawbacks: (1) The equipment is discrete and occupies a large space: The four independent devices are connected in sequence through pipes, valves and instruments, requiring a large amount of installation space and support structure, which makes the entire post-processing system large and bulky, especially unfavorable for deployment in space-constrained application scenarios (such as containerized hydrogen production units, offshore platforms, etc.).

[0005] (2) The system is complex and costly: the multiple independent containers, shells, pipelines and support structures lead to a significant increase in material costs and manufacturing costs. At the same time, the complex pipeline connections also increase installation time and engineering difficulty.

[0006] (3) Numerous connection points and high risk of leakage: Every flange and joint between the equipment is a potential hydrogen leakage point. The more equipment there are, the more sealing points and potential failure points there are in the system, which reduces the safety and reliability of the system.

[0007] (4) The process is lengthy and the pressure drop is large: Hydrogen needs to flow through multiple devices and connecting pipelines. The process is long and the flow resistance is large, resulting in a high overall pressure drop in the system. This will increase the back pressure of the electrolyzer and increase the energy consumption of electrolysis to a certain extent.

[0008] Therefore, under the current circumstances, it is essential to provide an electrolytic hydrogen post-processing device that can effectively overcome the aforementioned defects of existing technologies. Summary of the Invention

[0009] In view of this, in order to solve the problems of dispersed equipment, complex systems, low energy efficiency and high cost in the existing technology, this invention proposes a four-in-one integrated post-processing device suitable for hydrogen production by water electrolysis. It is an integrated purification device for cooling, washing and gas-liquid separation of high temperature, humid gaseous mixtures containing liquid droplets. It is especially suitable for post-processing purification of hydrogen produced by electrolyzers, including gas-liquid separation, washing, cooling and gas-water separation.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: An integrated four-in-one post-treatment device for hydrogen production via water electrolysis includes a housing. The inner cavity of the housing is divided into a left chamber and a right chamber by a heat-insulating baffle. An upper partition plate is installed on the upper side of the left chamber, corresponding to and fixedly connected to the inner wall of the left chamber and the heat-insulating baffle plate. A cyclone separator with a cyclone separation chamber is installed at the lower part of the upper partition plate. A tangential injection pipe is provided on the upper side wall of the cyclone separator, with one end of the tangential injection pipe, away from the cyclone separator, sealingly penetrating the housing. A bottom drain pipe is provided below the cyclone separator, and an alkali discharge port is provided on the lower side of the housing of the left chamber. A central exhaust pipe and a gravity settling exhaust pipe are installed through the upper partition plate. The lower end of the central exhaust pipe connects to the upper center of the cyclone separation chamber. The left chamber is located below the upper partition plate. The chamber consists of the cyclone separation chamber and the gravity settling and alkali collection chamber. The lower end of the gravity settling exhaust pipe is connected to the gravity settling and alkali collection chamber. The upper ends of the central exhaust pipe and the gravity settling exhaust pipe are connected to a main pipe. The other end of the main pipe extends into the right chamber through the gap between the heat insulation baffle and the inner top wall of the device shell, and is connected to the upper inlet of the cooling coil. A cooling water inlet is provided on the device shell on the lower side of the right chamber, and a cooling water outlet is provided on the device shell on the upper side of the right chamber. The right chamber between the cooling water inlet and the cooling water outlet forms a cooling water cavity. The cooling coil is completely placed in the cooling water cavity, and the lower end of the cooling coil extends to the bottom of the cooling water cavity and opens to form a bubble release port. A pure hydrogen outlet is provided on the device shell at the top of the right chamber.

[0011] Preferably, the heat insulation baffle consists of a left baffle and a right baffle located in the center of the inner cavity of the device housing, with a gap between the left baffle and the right baffle.

[0012] Preferably, a one-way check valve is installed above the gravity settling exhaust pipe.

[0013] Preferably, the cooling coil is a spiral metal pipe.

[0014] Preferably, the cooling coil has a horn-shaped structure that is narrow at the top and wide at the bottom at the bubble release port.

[0015] Preferably, the right chamber wall at the cooling water outlet is provided with a blocking structure to prevent hydrogen gas after washing and cooling from being discharged from the cooling water outlet.

[0016] Preferably, the blocking structure is in the shape of a quarter spherical shell.

[0017] Preferably, the inner wall of the right chamber at the pure hydrogen outlet is provided with a condensation sieve for blocking residual water vapor contained in the hydrogen.

[0018] Preferably, the tangential injection pipe is connected to the crude hydrogen pipeline of the electrolyzer located outside the device housing.

[0019] Preferably, the outlet end of the bottom drain pipe is horizontally positioned.

[0020] Compared with existing technologies, the four-in-one integrated post-treatment device for hydrogen production by water electrolysis of the present invention has the following advantages: 1. The equipment is highly compact, significantly saving floor space: This invention, through an integrated structural design, perfectly integrates the functions of four separate devices (gas-liquid separator, cooler, scrubber, and gas-water separator) in a traditional system into a single housing. Compared to the traditional discrete layout, this device significantly reduces the space requirements of the equipment, making it particularly suitable for space-constrained applications such as containerized hydrogen production units and offshore platforms.

[0021] 2. The system is significantly simplified, effectively reducing manufacturing and maintenance costs: By eliminating three separate enclosures and the numerous connecting pipes, flanges, valves, and support structures, the raw material costs, manufacturing costs, and on-site installation and piping costs of this unit are significantly reduced. At the same time, the simplified system structure also means fewer maintenance points and lower long-term maintenance costs.

[0022] 3. Significantly improved energy efficiency, enabling tiered energy utilization: This invention's innovative "immersion cooling-bubble washing" composite process achieves efficient utilization of the refrigerant twice. Hydrogen is first indirectly cooled in the cooling coil, and the released heat is absorbed by the water bath; subsequently, during the bubble washing process, direct contact heat exchange further ensures the cooling effect, greatly improving the overall heat exchange efficiency and eliminating the separate washing process in traditional methods, thus improving post-treatment efficiency.

[0023] 4. Separation and purification efficiency and reliability are comprehensively improved: By constructing a multi-stage, synergistic separation mechanism of "cyclone centrifugal separation + gravity sedimentation + bubble washing", this device improves the separation efficiency and reliability far beyond that of traditional single equipment or simple series equipment. It can not only efficiently remove entrained alkaline droplets through secondary separation, but also effectively cool hydrogen gas and remove condensate, ensuring the purity and dryness of the outlet hydrogen gas.

[0024] 5. Enhanced intrinsic safety and more reliable operation: This invention places the entire post-treatment process within a pressure-bearing boundary, fundamentally eliminating potential leakage points such as multiple external flanges and joints required for traditional multi-device connections. This greatly reduces the risk of hydrogen leakage and improves the inherent safety and long-term reliability of the entire post-treatment system.

[0025] 6. System process optimization reduces operational pressure drop: The integrated design of this invention optimizes and greatly reduces the internal flow channels. In particular, it utilizes the buoyancy of hydrogen gas after cooling as one of the flow driving forces, reducing the energy consumption of mechanical conveying. This reduces the airflow resistance (pressure drop) of the entire post-processing system, which helps to reduce the operating back pressure of the electrolyzer, thereby having a positive impact on reducing electrolysis energy consumption.

[0026] In summary, through structural integration and process innovation, this invention brings groundbreaking benefits in terms of compactness, economy, energy efficiency, safety, and operational performance, providing a superior post-treatment solution for hydrogen production from water electrolysis. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of a four-in-one integrated post-treatment device for hydrogen production by water electrolysis according to the present invention.

[0029] Figure 2 This is a schematic diagram of the internal working process of a four-in-one integrated post-treatment device for hydrogen production by water electrolysis according to the present invention.

[0030] Figure 3 This is a schematic diagram of the external structure of a four-in-one integrated post-treatment device for hydrogen production by water electrolysis according to the present invention.

[0031] Figure 4 This is a process flow diagram of the existing technical solution.

[0032] In the diagram: 1-Outer shell of the device, 2-Insulation baffle, 3-Upper partition, 4-Cyclone separator, 5-Tangential injection pipe, 6-Bottom drain pipe, 7-Alkali discharge port, 8-Central exhaust pipe, 9-Gravity settling exhaust pipe, 10-Cyclone separation chamber, 11-Gravity settling and alkali collection chamber, 12-Main pipe, 13-Cooling coil, 14-Cooling water inlet, 15-Cooling water outlet, 16-Cooling water chamber, 17-Bubble release port, 18-Pure hydrogen outlet, 19-One-way check valve, 20-Blocking structure, 21-Condensation sieve cylinder. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] Example: As attached Figure 1-3 As shown, this embodiment provides a four-in-one integrated post-treatment device suitable for hydrogen production by water electrolysis. Its core idea is to organically integrate the gas-liquid separator, scrubber, cooler and final gas-liquid separator, which are independent in the traditional process flow, into one device by taking advantage of the similarity of their working principles, through structural innovation and process reengineering, so as to realize the continuous and efficient operation of multiple processing steps.

[0035] Specifically, the four-in-one integrated post-treatment device for hydrogen production by water electrolysis includes a device shell 1 that provides pressure-bearing boundaries and structural support for the entire device. The inner cavity of the device shell 1 is divided into a left chamber and a right chamber by a heat insulation baffle 2. An upper partition 3 is also installed on the upper side of the left chamber, which is fixedly connected to the inner wall of the left chamber and the heat insulation baffle 2 respectively.

[0036] More specifically, the heat insulation baffle 2 consists of a left baffle and a right baffle located in the center of the inner cavity of the device housing, with a gap between the left and right baffles. In this embodiment, the left and right baffles not only separate the two chambers but also effectively insulate against the heat from the alkali solution. The upper partition 3 is fixedly connected to the corresponding left baffle.

[0037] A cyclone separator 4 with a cyclone separation chamber 10 is installed at the lower part of the upper partition 3. A tangential injection pipe 5 is provided on the upper side wall of the cyclone separator 4. The end of the tangential injection pipe away from the cyclone separator is sealed and penetrates the outer shell 1 of the device.

[0038] More specifically, the tangential injection pipe 5 is connected to the crude hydrogen pipeline of the electrolytic cell located outside the device housing 1, so that the gas-liquid two-phase flow enters the cyclone separation chamber 10 tangentially, and the cyclone separation chamber 10 is used to realize the primary centrifugal separation of gas and liquid.

[0039] The bottom drain pipe 6 is provided below the cyclone separator 4 to discharge the separated alkaline solution.

[0040] In a further specific embodiment, the outlet end of the bottom drain pipe 6 is set horizontally. By bending the bottom drain pipe 6 from vertical to horizontal, the gas discharged from the bottom drain pipe 6 can be prevented from flowing back vertically into the cyclone separation chamber 10.

[0041] The device housing 1 on the lower side of the left chamber is provided with an alkali discharge port 7 for discharging the recovered alkali.

[0042] A central exhaust pipe 8 and a gravity settling exhaust pipe 9 are installed through the upper partition 3. The lower end of the central exhaust pipe 8 is connected to the center of the upper part of the cyclone separation chamber to discharge the separated hydrogen gas.

[0043] The left chamber located below the upper partition 3 consists of a cyclone separation chamber 10 and a gravity settling and alkali collection chamber 11. The lower end of the gravity settling exhaust pipe 9 is connected to the gravity settling and alkali collection chamber 11.

[0044] In this embodiment, as Figure 1 As shown, the gravity settling exhaust pipe 9 is located to the right of the central exhaust pipe 8 and is flush with it, and is used to discharge the remaining gas collected from the gravity settling and alkali collection chamber 11.

[0045] More specifically, a one-way check valve 19 is installed above the gravity settling exhaust pipe 9 to prevent gas backflow.

[0046] The upper ends of the central exhaust pipe 8 and the gravity settling exhaust pipe 9 are connected to a main pipe 12. That is, the gas in the gravity settling exhaust pipe 9 passes through the one-way check valve 19 and merges with the central exhaust pipe 8 into the same pipe. The other end of the main pipe 12 extends into the right chamber through the gap between the heat insulation baffle and the inner top wall of the device shell, and is connected to the upper inlet of the cooling coil 13.

[0047] In this specific embodiment, the lower side of the heat insulation baffle 2 is directly fixed to the inner bottom wall of the device housing 1, and there is a gap between the upper side of the heat insulation baffle 2 and the inner top wall of the device housing 1 for the main pipe to pass through. That is to say, the heat insulation baffle 2 does not divide the inner cavity of the device housing 1 into two completely uncommunicated cavities.

[0048] However, since the upper partition 3 is fixedly connected to the inner wall of the left chamber and the corresponding heat insulation baffle 2 respectively, the outer edge of the upper partition 3 forms a strict separation between the upper and lower chambers of the left chamber.

[0049] A cooling water inlet 14 is provided on the device housing 1 on the lower side of the right chamber, and a cooling water outlet 15 is provided on the device housing 1 on the upper side of the right chamber. The right chamber between the cooling water inlet 14 and the cooling water outlet 15 constitutes a cooling water chamber 16, and the cooling coil 13 is completely placed in the cooling water chamber 16.

[0050] In this embodiment, the cooling coil 13 is specifically a spiral metal pipe immersed in a cooling water bath.

[0051] In this embodiment, the cooling water inlet 14 and the cooling water outlet 15 are located at the lower and upper parts of the cooling water chamber 16, respectively, to form a circulating water passage and maintain cooling efficiency.

[0052] Furthermore, a barrier structure 20 is provided on the right chamber wall at the cooling water outlet 15 to prevent hydrogen gas after washing and cooling from being discharged from the cooling water outlet 15. The shape of the barrier structure 20 is preferably a quarter-spherical shell.

[0053] The lower end of the cooling coil 13 extends to the bottom of the cooling water chamber and opens to form a bubble release port 17. The cooled hydrogen gas is released into the water bath in the form of bubbles from here and floats up for washing and secondary cooling.

[0054] This invention creatively combines "immersion cooling" and "bubble washing" into one. Hydrogen is cooled by external circulating water in the cooling coil, and then the hydrogen directly enters the water bath in the form of bubbles, achieving efficient direct contact heat exchange and washing. This greatly reduces the equipment's footprint and overall volume, and realizes the system's compactness.

[0055] In a further specific embodiment, the bubble release port 17 of the cooling coil 13 is provided with a horn-shaped structure that is narrow at the top and wide at the bottom, which allows the bubbles to be released evenly at the bubble release port.

[0056] A pure hydrogen outlet 18 is provided on the outer casing 1 at the top of the right chamber for discharging pure, low-temperature hydrogen that has undergone all processing.

[0057] In a further specific embodiment, a condenser sieve 21 is provided on the inner wall of the right chamber at the pure hydrogen outlet 18 to block residual water vapor contained in the hydrogen. By covering the pure hydrogen outlet 18, the condenser sieve 21 can effectively block residual water vapor contained in the hydrogen, ensuring that the pure hydrogen outlet can ultimately discharge pure, low-temperature hydrogen.

[0058] Figure 2 The red arrows represent the direction of alkali flow, the red dashed lines represent alkali, the blue arrows represent the direction of hydrogen flow, and the blue dashed lines represent cooling washing water.

[0059] See Figure 2The working principle and process of this invention are as follows: The crude hydrogen gas produced by the electrolyzer enters the cyclone separation chamber 10 in the left half of the device through the tangential injection pipe 5.

[0060] Step 1: Primary centrifugation and secondary gravity separation. Within the cyclone separator 10, under centrifugal force, the gas moves towards the axis and converges into a gas nucleus, escaping from the central exhaust pipe 8. The denser liquid moves towards the sidewall, spiraling downwards along the sidewall and finally exiting from the bottom drain pipe 6, achieving initial separation of the gas and liquid phases. Simultaneously, trace amounts of hydrogen mixed in the alkaline solution undergo further separation via gravity settling in the alkaline solution collection chamber 11. The collected gas passes through the gravity settling exhaust pipe 9 and, after passing through the one-way check valve 19, merges with the mainstream hydrogen into the same main pipe 12, and then together enters the cooling coil 13.

[0061] Step 2: Cross-chamber flow and thermal isolation. The heat insulation baffle 2 effectively prevents the high temperature on the left side from interfering with the cooling environment on the right side, while also preventing untreated gas on the left side from interfering with the pure gas on the right side.

[0062] Step 3: Immersion Cooling and Bubble Washing. Hydrogen gas is indirectly cooled to near water temperature by circulating water in the cooling coil 13 of the right chamber. Subsequently, it is released from the bubble release port 17 at the bottom, enters the water bath to form bubbles, and floats freely to the top. During the floating process, it undergoes direct contact washing and cooling to thoroughly remove residual alkali.

[0063] Step 4: Final gas-liquid separation and drying. Moistened hydrogen rises to the top, passes through the condenser sieve 21, where the water droplets it carries are blocked, condensed, and fall, thus achieving efficient gas-liquid separation and improving the dryness of the outlet hydrogen. Finally, pure hydrogen is discharged from the pure hydrogen outlet 18.

[0064] In summary, the four-in-one integrated post-treatment device for hydrogen production by water electrolysis of the present invention has the following key features: 1. High integration of functions and structure: This invention creatively integrates four independent devices (gas-liquid separator, cooler, scrubber, and gas-water separator) in a traditional system into a common device by taking advantage of the commonality of their working principles. This achieves miniaturization and compactness of the device, and significantly reduces external connection pipelines and floor space.

[0065] 2. Innovative Combined Cooling and Washing Process: This invention breaks away from the traditional series model of indirect cooling followed by direct washing. It creatively allows hydrogen to first exchange heat indirectly within the cooling coil, and then, after exiting at the bubble release port, directly contact the cooling medium for heat exchange, simultaneously providing immersion washing functionality. This not only simplifies the structure but also achieves cascaded utilization of the cooling medium (water) through secondary cooling heat exchange, thus improving energy efficiency.

[0066] 3. A multi-stage synergistic separation mechanism significantly improves purification efficiency: After the hydrogen enters the cyclone separation chamber for the first separation, it is discharged into the gravity settling and alkali collection chamber. The hydrogen mixed in with the alkali solution that has not been separated undergoes a second separation in this chamber through gravity settling. This invention organically combines two common separation methods in the same chamber, which not only improves separation efficiency but also reduces the floor space required. Moreover, as the hydrogen is discharged into the water bath through the bubble release port and floats upward, another gravity separation occurs, and the condenser screen blocks excess condensate, thus improving the purity of the hydrogen.

[0067] 4. Utilizing buoyancy: After the hydrogen has completed its immersion and cooling process, it uses its own buoyancy as a driving force to complete the washing and upward flow to the outlet. This ingenious and natural design helps to reduce the overall pressure drop of the system.

[0068] 5. Enhanced safety and reliability: Since all critical processing steps are completed within a single pressure vessel, this invention significantly reduces the number of external sealing points such as flanges and joints required for traditional multi-device connections, fundamentally reducing the risk of hydrogen leakage and improving the safety and operational reliability of the entire aftertreatment system.

[0069] It should also be noted that the application of this invention is not limited to the field of hydrogen production by water electrolysis. Its core integrated concept of "multi-stage separation-immersion cooling-bubble washing" can be widely applied to any industrial scenario that requires cooling, washing and purification of process gases that are high temperature, humid and contain droplets.

[0070] To adapt to different application scenarios, the device can be modified as follows: Material adaptability: The main material of the device can be replaced depending on the properties of the gas or liquid being processed, such as alkali-resistant, acid-resistant, and high-temperature-resistant materials.

[0071] Scale and size: The size of the device can be scaled up or down proportionally according to the gas processing capacity of the specific process.

[0072] Cooling medium: The medium in the cooling water chamber can be replaced with antifreeze such as ethylene glycol aqueous solution or other refrigerants, depending on the required cooling temperature.

[0073] Application scenarios: Any industrial scenario requiring gas purification, such as chemical syngas purification (methanol synthesis or Fischer-Tropsch synthesis), biogas / biomass gas purification, and fermentation tail gas recovery and treatment.

[0074] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0075] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A four-in-one integrated post-treatment device suitable for hydrogen production by electrolysis of water, characterized in that, The device housing is divided into left and right chambers by a heat insulation baffle, and an upper baffle is installed on the upper side of the left chamber and fixed to the inner wall of the left chamber and the heat insulation baffle respectively; a cyclone separator with a cyclone separation chamber is installed on the lower part of the upper baffle, and a tangential injection pipe is arranged on the upper part of the sidewall of the cyclone separator, and the end of the tangential injection pipe away from the cyclone separator is sealed and penetrates the device housing; a bottom liquid discharge pipe is arranged below the cyclone separator, and an alkali liquid discharge port is arranged on the device housing on the lower side of the left chamber; a central exhaust pipe and a gravity sedimentation exhaust pipe are installed through the upper baffle, the lower end of the central exhaust pipe is connected to the upper central part of the cyclone separation chamber, the left chamber below the upper baffle is composed of the cyclone separation chamber and the gravity sedimentation and alkali liquid collection chamber, and the lower end of the gravity sedimentation exhaust pipe is connected to the gravity sedimentation and alkali liquid collection chamber; the upper ends of the central exhaust pipe and the gravity sedimentation exhaust pipe are connected to a main pipe, the other end of the main pipe extends into the right chamber through the gap between the heat insulation baffle and the top wall of the device housing, and is connected to the upper end inlet of a cooling coil; a cooling water inlet is arranged on the device housing on the lower side of the right chamber, a cooling water outlet is arranged on the device housing on the upper side of the right chamber, the right chamber between the cooling water inlet and the cooling water outlet constitutes a cooling water chamber, the cooling coil is completely arranged in the cooling water chamber, and the lower end of the cooling coil extends to the bottom of the cooling water chamber and forms a bubble release port; a pure hydrogen outlet is arranged on the device housing on the top of the right chamber.

2. The four-in-one integrated post-processing device for hydrogen production by water electrolysis according to claim 1, characterized in that, The heat insulation baffle is composed of a left baffle and a right baffle located in the central part of the inner cavity of the device housing, and a gap is left between the left baffle and the right baffle.

3. The four-in-one integrated post-processing device for hydrogen production by water electrolysis according to claim 1, characterized in that, A one-way check valve is installed above the gravity sedimentation exhaust pipe.

4. The four-in-one integrated post-processing device for hydrogen production by water electrolysis according to claim 1, characterized in that, The cooling coil is a spiral metal pipe.

5. The four-in-one integrated post-processing device for hydrogen production by water electrolysis according to claim 1, characterized in that, A horn cover structure with a narrow upper part and a wide lower part is arranged at the bubble release port of the cooling coil.

6. The four-in-one integrated post-processing device for hydrogen production by water electrolysis according to claim 1, characterized in that, A blocking structure is arranged on the inner wall of the right chamber at the cooling water outlet to prevent the washed and cooled hydrogen from being discharged from the cooling water outlet.

7. The four-in-one integrated post-processing device for hydrogen production by water electrolysis according to claim 6, characterized in that, The blocking structure is in the shape of a 1 / 4 spherical shell.

8. The four-in-one integrated post-processing device for hydrogen production by water electrolysis according to claim 1, characterized in that, A condensing screen cylinder is arranged on the inner wall of the right chamber at the pure hydrogen outlet to block the remaining water vapor in the hydrogen.

9. The four-in-one integrated post-processing device for hydrogen production by water electrolysis according to claim 1, characterized in that, The tangential injection pipe is connected to the coarse hydrogen pipe of an electrolytic cell outside the device housing.

10. The four-in-one integrated post-processing device for hydrogen production by water electrolysis according to claim 1, characterized in that, The outlet end of the bottom liquid discharge pipe is arranged horizontally.

Images