Waste heat recovery device with energy-saving pump for electrolytic hydrogen production, gas supply and heat supply

Abstract

The invention discloses an electrolytic hydrogen production, gas supply and heat supply waste heat recovery device with an energy-saving pump, and relates to the technical field of electrolytic hydrogen production waste heat recovery. The first assembly comprises clamping grooves symmetrically formed in the electrolytic tank, and a transverse pipe A is arranged in one of the clamping grooves in a clamped mode. Through the design of the first assembly, the dynamic characteristics of water flow can be effectively optimized, and smooth transition of the flow speed is achieved; compared with sudden water flow direction change and flow velocity fluctuation caused by bent pipe connection in the prior art, the integrated connection design of the transverse pipe and the coating pipe eliminates sudden flow channel change caused by a bent structure, the water flow can transversely flow along a smooth pipeline path, uniform coating is achieved, generation of local vortex and turbulent flow is avoided, and the service life of the pipeline is prolonged. Stable transition of the flow velocity from the transverse pipe to the wrapping pipe is achieved, the problem that the flow velocity is not uniform due to an existing connecting pipe assembly is effectively solved, and a stable fluid mechanics foundation is provided for heat exchange.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery technology in electrolytic hydrogen production, specifically to a waste heat recovery device for electrolytic hydrogen production gas supply and heating with an energy-saving pump. Background Technology

[0002] In the scenario of waste heat recovery and utilization in electrolytic hydrogen production technology, the mainstream technical approach to accelerate the subsequent electrolytic reaction rate is to absorb the waste heat emitted by the electrolyzer by circulating cold water in the pipeline system, and then transfer the heat contained in the water carrying the heat to the water storage tank of the device, and then to the electrolyte to increase its temperature.

[0003] However, in the existing waste heat recovery system, bends are widely used as common connecting components. The bending structure of these connecting components can lead to poor water flow velocity transition and uneven velocity distribution at the pipe connection, which in turn has an adverse effect on the overall effect of waste heat recovery. At the same time, most existing waste heat recovery pipeline systems adopt fixed connection methods, and the metal pipes that make up the pipeline do not have the characteristics of flexible bending. When the heat exchange area of ​​the existing pipeline cannot meet the heat exchange demand and waste heat recovery pipes need to be added, or when the installation position of the waste heat recovery pipeline needs to be adjusted according to the usage requirements, the change of the position of a single pipe will affect other pipes connected to it. The entire pipeline system must be disassembled to complete the adjustment or addition operation, which is cumbersome and seriously affects the continuous operation of the equipment. Furthermore, waste heat recovery relies on cold water as the heat transfer medium. Calcium and magnesium ions in the water easily form scale on the inner wall of the pipes during the heat absorption and transfer cycle. The presence of scale hinders effective heat transfer and disrupts water flow, reducing waste heat recovery efficiency and negatively impacting the long-term stable operation of the pipeline system. In summary, existing technologies have significant shortcomings in optimizing water flow stability in waste heat recovery pipelines, facilitating pipe location adjustments and additions, and addressing scale issues. These shortcomings make it difficult to meet the demands for efficient and stable waste heat recovery, and considerable room for improvement remains in these technical aspects.

[0004] Therefore, this invention proposes a waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump to solve the above problems. Summary of the Invention

[0005] In view of this, a waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump is proposed to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a waste heat recovery device for electrolytic hydrogen production, gas supply and heating with an energy-saving pump, comprising: an electrolytic cell, and further comprising: a first component; The first component includes symmetrically arranged slots on the electrolytic cell, one of which is fitted with a transverse tube A. A partition plate is fixedly connected to the inner cavity of the transverse tube A. A water outlet is fixedly connected to the tail end of the transverse tube A. A flange seat A is fixedly connected to the outer wall of the front end of the transverse tube A. A flange seat B is fixedly connected to the inner annular wall of the transverse tube A at equal intervals.

[0007] As an improvement, a coating tube is sleeved on the electrolytic cell, and a flange seat C is fixedly connected to the coating tube. The flange seat C is symmetrically fixed on both sides of the coating tube and is connected to its inner cavity. The bottom of the covered tube is fixedly connected to a sealing seat by bolts, and another horizontal tube B is clamped in the clamping groove.

[0008] As an improvement, it also includes a main pipe assembly; The main pipe assembly includes an inlet pipe, an outlet pipe, an oxygen outlet pipe, and a hydrogen outlet pipe that are connected and fixed to the side wall of the electrolytic cell; the inlet pipe and the outlet pipe are located below the oxygen outlet pipe and the hydrogen outlet pipe.

[0009] As an improvement, a second component is also included; The second component includes a rotating rod rotatably connected inside the transverse tube A, with an insertion hole at the end of the rotating rod, and a spiral scraper fixedly connected to the rotating rod.

[0010] As an improvement, an arc-shaped component is slidably connected inside the covering tube. A recessed groove is provided on the arc-shaped component. A scraper is provided in the recessed groove. A spring is fixedly connected to the inner wall of the scraper. The other end of the spring is fixedly connected to the wall of the recessed groove. Magnet A and magnet B are symmetrically snapped onto the covering tube. Magnet B has a slot that is inserted and adapted to the protrusion on magnet A.

[0011] As an improvement, the transverse pipe A is divided into two chambers by a partition plate: a water injection chamber and a drainage chamber.

[0012] As an improvement, the covering tube is annular; the covering tube and the sealing seat are assembled to form an annular tube body.

[0013] As an improvement, the arc-shaped component is magnetic and hollow.

[0014] Compared with the prior art, the present invention provides a waste heat recovery device for electrolytic hydrogen production, gas supply and heating with an energy-saving pump, which has the following beneficial effects: 1. The design of the first component in this invention provides the following advantages: Optimizing hydrodynamic characteristics to achieve smooth flow velocity transition: Compared with the sudden changes in water flow direction and flow velocity fluctuations caused by the bend in the existing technology, the integrated connection design of the transverse pipe and the covering pipe eliminates the sudden changes in the flow channel caused by the bend structure. The water can flow laterally and be evenly covered along the smooth pipe path, avoiding the generation of local eddies and turbulence, and achieving a smooth transition of flow velocity from the transverse pipe to the covering pipe. This effectively solves the problem of uneven flow velocity caused by the existing connecting pipe components and provides a stable hydrodynamic basis for heat exchange. Reducing flow resistance in the piping system and improving energy efficiency: The bending structure of connecting pipes such as bends creates significant local resistance, forcing the water pump to consume additional energy to overcome the resistance and ensure flow rate; however, the first component, by eliminating bends and simplifying the connection structure, significantly reduces the sources of flow resistance, and the flow resistance between the transverse pipe and the covered pipe is significantly reduced; this not only reduces the operating load of the water pump and lowers energy consumption, but also works synergistically with the energy-saving pump design of the device to further enhance the energy-saving performance of the system and extend the service life of the pump body; Improving waste heat recovery efficiency and stability: The uniformity and smoothness of the flow rate directly affect the contact effect between the cold water and the pipe wall. The first component ensures that the residence time of the cold water in the pipe is relatively uniform, avoiding the problems of insufficient heat absorption caused by excessively fast local flow rates and heat accumulation caused by excessively slow local flow rates in existing technologies. The cold water can fully and uniformly exchange heat with the pipe (and the electrolytic cell area where the covering pipe is attached), significantly improving heat transfer efficiency. At the same time, the stable flow rate makes the waste heat recovery process more controllable, and the heat transferred to the water storage tank is more stable, thereby ensuring a uniform increase in electrolyte temperature and effectively guaranteeing the stability of the subsequent electrolytic reaction rate. Enhancing the structural stability and durability of the pipeline system: The connection between bends and other pipelines is prone to stress concentration due to structural abrupt changes, and may loosen or leak after long-term water flow impact; while the design of horizontal pipes and covered pipes reduces the number of connection points, and the smooth flow channel makes the water flow impact on the pipeline more uniform, avoiding local stress concentration, improving the overall structural stability and fatigue resistance of the pipeline system, extending the service life of waste heat recovery pipelines, and reducing the safety risks of system operation.

[0015] 2. The present invention, by using a casing tube to enclose the electrolytic cell and a transverse tube positioned on the side of the electrolytic cell and connected to the casing tube, offers the following advantages: This design enables convenient addition and removal of waste heat recovery pipelines without requiring overall system disassembly. Compared to existing technologies where pipelines are fixedly connected and require complete disassembly for individual pipeline changes, this design uses a horizontal pipe as the core connecting main pipe. Each covered pipe is independently connected to the horizontal pipe via bolts, and the covered pipes are assembled into the electrolytic cell using a nested method, forming a "modular" pipeline unit. When adding or removing covered pipes, only the connecting bolts between the corresponding covered pipe and the horizontal pipe need to be removed individually, without affecting other pipes or the entire pipeline system. This significantly simplifies the operation process, completely solves the pain point of existing technologies where pipeline addition and removal depend on complete disassembly, and significantly improves the convenience of pipeline adjustment. Flexible adjustment of heat exchange contact area for precise adaptation to heat exchange needs: In existing technologies, the contact area between the pipe and the electrolytic cell is fixed and cannot be adjusted according to changes in the heat generated by the electrolytic cell or actual heat exchange needs, which can easily lead to insufficient heat exchange area or waste of resources. However, this design can directly change the contact surface area between the waste heat recovery pipe and the electrolytic cell by increasing or decreasing the number of covered pipes installed on the electrolytic cell. During peak heat generation, the number of covered pipes is increased to improve heat exchange capacity, and during low heat generation, the number of covered pipes is reduced to avoid idle resources. This achieves a precise match between heat exchange needs and contact area, optimizes the resource utilization efficiency of waste heat recovery, and avoids the problem of mismatch between heat exchange capacity and actual needs in existing technologies.

[0016] Simplifying the piping system structure and improving assembly and adaptation flexibility: The integrated design of the horizontal pipe and the covered pipe replaces the complex connection of multiple bends and joints in the existing technology, reducing the number of piping system components and making the structure simpler; during assembly, there is no need for cumbersome bend alignment and fixing, resulting in higher installation efficiency; at the same time, the simple connection structure allows the piping system to be fine-tuned in the future without involving multiple related pipes, making it more adaptable and leaving room for subsequent pipeline optimization (such as local expansion), indirectly improving the flexibility and adaptability of the entire waste heat recovery system.

[0017] 3. The design of the second component in this invention provides the following advantages: Restoring pipe heat transfer performance and improving the stability of waste heat recovery efficiency: In existing technologies, scale buildup hinders heat transfer, leading to a decrease and fluctuation in waste heat recovery efficiency. The second component, through targeted descaling, can remove the scale layer on the inner walls of the outer and transverse pipes, restoring the cleanliness and thermal conductivity of the pipe inner walls. This makes the heat transfer path between cold water and the pipe walls and electrolytic cell smoother, avoiding local heat transfer obstruction and uneven heat exchange caused by scale. At the same time, the clean pipe inner walls can maintain a stable heat transfer coefficient for a long time, ensuring that the waste heat recovery efficiency is always in the optimal range. This ensures that the heat transferred to the water storage tank is uniform and stable, providing continuous and reliable thermal support for electrolyte heating, and indirectly improving the stability of the subsequent electrolysis reaction rate. Optimizing water flow smoothness reduces system energy consumption and operating load: Scale reduces the cross-section of pipe flow channels, increases water flow resistance, and forces the water pump to consume additional energy to overcome the resistance and ensure circulation flow. The second component, through descaling, restores the original design flow channel dimensions of the pipes, reducing frictional and local resistance, making the circulation of cold water in the horizontal and encased pipes smoother. This not only reduces the operating load of the energy-saving pump and decreases electrical consumption, creating a synergistic effect with the energy-saving design of the system, but also avoids insufficient flow caused by excessive water flow resistance, ensuring that the cold water circulation rate meets heat exchange requirements, further enhancing the system's energy-saving and stable operating characteristics. To avoid system failures caused by scale buildup and improve operational safety: In existing technologies, scale buildup not only affects heat exchange and water flow, but also often causes blockages due to scale shedding, leading to malfunctions such as localized pressure buildup in pipes and pump overload. The second component, through timely descaling, can prevent excessive scale buildup and shedding, avoiding problems such as pipe blockage and valve jamming, and ensuring the smooth flow and stability of the cold water circulation system. At the same time, clean pipe inner walls can reduce stress concentration caused by water flow impact, reduce the risk of leakage at pipe joints due to unstable water flow, and further improve the operational safety and reliability of the entire waste heat recovery system.

[0018] 4. The design of the arc-shaped tube and the shape of the covered tube in this invention can bring the following advantages: To ensure stable water flow and further reduce flow resistance: The arc-shaped pipe adopts a hollow structure with no obstructions or protruding parts inside, fully preserving the effective flow channel cross-section of the pipe. Water can flow smoothly along the hollow channel, avoiding local narrowing or eddy currents caused by the internal structure of the pipe. Compared with non-hollow pipes (or pipes with internal support structures) that may exist in the prior art, its flow resistance is significantly reduced. It can not only synergize with the bend-free pipe design of "transverse pipe + covered pipe" to further optimize the hydrodynamic characteristics, but also reduce the operating load of the energy-saving pump and enhance the energy-saving effect of the system. Unobstructed gravity transfer channel for scale, avoiding secondary retention: After scraping, scale fragments need to be transferred by gravity. The hollow design of the arc-shaped tube provides an unobstructed falling channel for scale - without having to bypass the internal support structure or shielding parts of the pipe, scale can fall directly and quickly into the encased pipe along the hollow cavity, completely eliminating dead corners for scale retention that may be caused by the existing internal structure of the pipe, and avoiding the risk of secondary deposition and adhesion of scale from the source. Enhanced water flow velocity stability and improved heat exchange uniformity: The annular structure of the coated pipe replaces the bends used for connection in existing technologies. Water flows smoothly along the annular trajectory, preventing localized eddies or sudden velocity changes. This effectively solves the problem of uneven flow velocity caused by existing bends, resulting in more thorough and uniform contact between cold water and the pipe wall and electrolytic cell, significantly improving heat exchange efficiency and stability. Furthermore, the closed arc structure of the annular shape creates a uniform gravity-guided surface on the inner wall of the coated pipe. Scale fragments after descaling naturally accumulate at the lowest point of the annular pipe under gravity, rather than being scattered and adhered to various parts of the inner wall. This "centralized" effect allows scale to form predictable accumulation areas, requiring only a drain outlet in these areas for centralized discharge, eliminating the need for comprehensive cleaning of the entire pipe and greatly simplifying the scale removal process. The two components construct an unobstructed closed-loop system for "scale transfer-guidance-discharge": the hollow channel in the arc-shaped pipe provides a smooth transfer path for scale from the horizontal pipe to the covered pipe, ensuring no scale buildup; the annular structure of the covered pipe receives the scale and guides it to the centralized sewage discharge area via an annular guide surface. Together, they form a complete scale treatment process characterized by "unobstructed transfer, directional guidance, and targeted discharge." Compared to existing technologies where scale easily accumulates at pipe joints and internal structures, this collaborative design completely solves the problems of incomplete scale removal and secondary deposition, maintaining pipe cleanliness in the long term. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the main structure of the present invention; Figure 2 This is a top view of the main structure of the present invention; Figure 3 This is a diagram showing the structural positions of the horizontal tube A and the covering tube in this invention. Figure 4 This is a structural diagram of the first component in this invention; Figure 5 This is a diagram showing the location distribution of relevant components on the transverse tube A in this invention; Figure 6 The diagram shows the relevant structures of the covering tube, the sealing seat, magnet A, and magnet B in this invention. Figure 7 This is a diagram showing the state of the second component in this invention performing descaling on the inner wall of the coated tube; Figure 8 This is a structural diagram of the arc-shaped component and scraper in this invention; Figure 9 This is a plan view of the part after being cut by the scraper in this invention; Figure 10 This is an anatomical diagram of the arc-shaped component and the scraper of the present invention.

[0020] In the picture: 1. Electrolytic cell; 2. Main pipe assembly; 201. Liquid inlet pipe; 202. Liquid outlet pipe; 203. Oxygen outlet pipe; 204. Hydrogen outlet pipe; 3. First component; 301. Locking groove; 302. Horizontal pipe A; 303. Divider plate; 304. Water outlet; 305. Flange seat A; 306. Covering pipe; 307. Flange seat B; 308. Flange seat C; 309. Sealing seat; 310. Horizontal pipe B; 4. Second component; 401. Rotating rod; 402. Insertion hole; 403. Spiral scraper; 404. Arc part; 405. Recessed groove; 406. Scraper; 407. Spring; 408. Magnet A; 409. Magnet B. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] Example Please refer to Figures 1 to 4 , Figure 6 As shown: To address the problems mentioned in the technical solutions, this application provides a waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump, comprising: an electrolytic cell 1, and further comprising: a first component 3; The first component 3 includes symmetrically arranged locking slots 301 on the electrolytic cell 1. A transverse tube A302 is locked in one of the locking slots 301. A partition plate 303 is fixedly connected to the inner cavity of the transverse tube A302. A water outlet 304 is fixedly connected to the tail end of the transverse tube A302. A flange seat A305 is fixedly connected to the outer wall of the front end of the transverse tube A302. A flange seat B307 is fixedly connected to the inner annular wall of the transverse tube A302 at equal intervals. A covering tube 306 is sleeved on the electrolytic cell 1. A flange seat C308 is fixedly connected to the covering tube 306. The flange seat C308 is symmetrically fixed on both sides of the covering tube 306 and connected to its inner cavity. A sealing seat 309 is fixedly connected to the bottom of the covering tube 306 by bolts. A transverse tube B310 is locked in the other locking slot 301. It also includes a main pipe assembly 2; the main pipe assembly 2 includes an inlet pipe 201, an outlet pipe 202, an oxygen outlet pipe 203, and a hydrogen outlet pipe 204 that are connected and fixed to the side wall of the electrolytic cell 1; the inlet pipe 201 and the outlet pipe 202 are located below the oxygen outlet pipe 203 and the hydrogen outlet pipe 204.

[0024] in: Electrolyzer 1 is used for hydrogen electrolysis. During the hydrogen electrolysis process, the equipment generates heat. Specifically, AEM electrolysis of water to produce hydrogen requires the input of electrical energy to drive water molecules to decompose into hydrogen and oxygen. However, not all electrical energy can be converted into chemical energy. Some electrical energy will be converted into heat energy due to the internal resistance of electrolyzer 1, causing the internal temperature of electrolyzer 1 to rise. Furthermore, when water molecules undergo oxidation-reduction reactions on the membrane electrode surface of AEM electrolyzer 1, there will be an inherent exothermic phenomenon. Both of the above reaction processes will release heat, further increasing the internal temperature of electrolyzer 1.

[0025] Main tube assembly 2 is used for the transfer of gas and liquid during the electrolysis process, ensuring that the electrolysis process is effective and continuous.

[0026] The first component 3 is used to recover and utilize the heat emitted by the electrolytic cell 1 during electrolysis. Specifically, after absorbing the heat emitted by the electrolytic cell 1 through cold water, the hot water with heat, or the absorbed heat, is transferred to the water storage tank of the whole device, and then the heat is transferred to the electrolyte to increase the temperature of the electrolyte, which is conducive to accelerating the subsequent electrolysis rate.

[0027] The transverse tubes A302 and B310 can be fixed in the mounting slots 301 opened on both sides of the electrolytic cell 1.

[0028] The horizontal pipe A302 is divided into two chambers by the partition 303: one for water inlet and one for water outlet. For details, please refer to the appendix. Figure 2 Cold water is transferred from the injection pipe cavity through flange seat B307 to flange seat C308, then through flange seat C308 into the covering pipe 306 and the horizontal pipe B310, and finally through the flange seat B307 at the very end of the horizontal pipe A302 into the drainage pipe cavity, and then out through the outlet pipe 304, thus completing the waste heat recovery and transfer work. The left side is the drainage pipe cavity, and the right side is the injection pipe cavity.

[0029] The covering tube 306 and the sealing seat 309 are assembled to form a ring tube body; the sealing seat 309 is fixed to the bottom of the covering tube 306 by bolts, so that the arc part 404 can be easily inserted into or removed from the covering tube 306.

[0030] The ring-shaped design of the 306-covered pipe not only reduces the impact of the number of bends in the pipe connection on the water flow rate, but its shape also guides and transfers the cleaned scale, making it easier for it to be discharged from the bottom of the 306-covered pipe.

[0031] The coated tube 306 can be fitted onto the electrolytic cell 1. If it is desired to increase the heat exchange area of ​​the coated tube 306, the coated tube 306 can be assembled with the unused flange seat B307 through the flange seat C308; or two halves of the coated tube 306 can be spliced ​​onto the electrolytic cell 1 and fixed by welding.

[0032] Multiple flange seats B307 are equidistantly arranged on the horizontal pipe A302. In use, flange seats B307 can be assembled with the covered pipe 306 through flange seats C308. It should be noted that flange seats B307 that are not assembled with flange seats C308, i.e., unused flange seats B307, can be sealed with sealing parts.

[0033] Flange seat C308 is symmetrically fixed on both sides of the covered pipe 306 and is connected to its inner cavity.

[0034] The overall design of the first component 3, especially through the use of the horizontal pipe A302 and the covering pipe 306, optimizes the pipe connection / joining. This eliminates existing elbows and other connecting pipe components, reducing the impact of poor water flow velocity transition and uneven flow velocity at pipe connections caused by the number of bends on waste heat recovery. At the same time, waste heat recovery pipes, i.e., the covering pipe 306, can be easily added or removed without disassembling the entire pipe system. The design of reducing the number of pipe bends and easily adding or removing waste heat recovery pipes without disassembling the entire pipe system allows for adaptive adjustment of the contact surface area between the electrolytic cell 1 and the waste heat recovery pipe during waste heat recovery, thus optimizing resource utilization efficiency.

[0035] A further embodiment: Please refer to Figure 1 , Figure 3 , Figures 5 to 10 As shown: The second component 4 includes a rotating rod 401 rotatably connected to the transverse tube A302. The end of the rotating rod 401 has an insertion hole 402. A spiral scraper 403 is fixedly connected to the rotating rod 401. An arc-shaped component 404 is slidably connected inside the covering tube 306. A recessed groove 405 is provided on the arc-shaped component 404. A scraper 406 is provided in the recessed groove 405. A spring 407 is fixedly connected to the inner wall of the scraper 406. The other end of the spring 407 is fixedly connected to the wall of the recessed groove 405. Magnets A408 and B409 are symmetrically snapped onto the covering tube 306. A slot is provided on magnet B409, which is inserted and adapted to the protrusion on magnet A408.

[0036] in: The second component 4 is used to descale the pipeline, reducing the impact of scale on water flow during waste heat recovery and heat exchange.

[0037] The operator can manually or by using a drive device inserted into the hexagonal socket 402 to cause the rotating rod 401 to rotate. As the rotating rod 401 rotates, it will carry the spiral scraper 403 to rotate inside the transverse tube A302, thereby scraping the scale attached to the inner ring wall. The scraped scale can be transferred through the rotation of the spiral scraper 403 to the flange seat A305 of the spiral scraper 403 body or any flange seat B307 that is easy to clean.

[0038] The arc-shaped component 404 is magnetic and can be attracted to magnets A408 and B409. In use, the operator holds magnet A408 with one hand and magnet B409 with the other, and then slides it along the guide tube 306. During this process, the arc-shaped component 404 inside the cover tube 306 will move along with it and scrape the scale with the scraper 406.

[0039] The arc-shaped part 404 is hollow, which not only does not obstruct the normal flow of water, but also does not hinder the movement of scale within the encapsulated pipe 306 due to gravity after scale is scraped off.

[0040] Spring 407 ensures that scraper 406 remains in close contact with the inner wall of the tube 306, guaranteeing that scraper 406 can stably and effectively clean the scale on the inner wall. Even if there are slight irregularities or uneven scale thickness on the inner wall of the tube 306, scraper 406 can adapt and fit, avoiding the situation of "not being able to scrape clean".

[0041] The magnet B409 has a slot to facilitate the insertion of the tab on the magnet A408, which helps to stabilize the two.

[0042] The entire process described in the above embodiments is divided into five stages, as follows: Phase 1: Initial Operation and Heat Generation Phase Electrolyzer 1 starts electrolytic hydrogen production: During the process, some electrical energy is converted into heat energy due to the internal resistance of electrolyzer 1. At the same time, water molecules undergo oxidation-reduction reaction on the surface of membrane electrode, accompanied by inherent heat release. The dual effect causes the temperature of electrolyzer 1 to rise and continuously dissipate residual heat. Main tube group 2 operates synchronously: the liquid inlet pipe 201, liquid outlet pipe 202, oxygen outlet pipe 203, and hydrogen outlet pipe 204 complete the gas-liquid transfer during the electrolysis process according to the preset path. Among them, the liquid inlet pipe 201 and liquid outlet pipe 202 are located below the oxygen outlet pipe 203 and hydrogen outlet pipe 204 to ensure that the electrolysis reaction continues to proceed efficiently.

[0043] Phase Two: Waste Heat Recovery Cycle Phase Cold water injection and diversion: Cold water enters the pipeline system through the water injection cavity of the horizontal pipe A302. The horizontal pipe A302 is snapped and fixed in the clamping groove 301 on one side of the electrolytic cell 1. The flange seat B307, which is equidistantly arranged on the inner ring wall, is precisely connected to the flange seat C308 on both sides of the covering pipe 306. The cold water is diverted through the flange seat B307 and the flange seat C308 to the annular covering pipe 306 sleeved on the electrolytic cell 1. Waste heat absorption and water circulation: The covering pipe 306 is tightly fitted to the electrolytic cell 1, and the cold water flows smoothly in the annular flow channel to fully absorb the waste heat emitted by the electrolytic cell 1; the hot water after heat absorption returns along the original flow channel, and flows into the drainage cavity of the horizontal pipe A302 through the flange pipe seat C308 and flange pipe seat B307 on the other side, and is finally discharged through the water outlet 304 at the end of the horizontal pipe A302, transferring heat to the water storage tank of the device, thereby heating the electrolyte to improve the subsequent electrolysis reaction rate; Auxiliary pipeline coordination: A transverse pipe B310 is installed in the clamping groove 301 on the other side of the electrolytic cell 1, forming symmetrical support with the transverse pipe A302 to ensure the overall stability of the pipeline system; the bottom of the covering pipe 306 is fixed with a closed seat 309 by bolts, which is assembled with the covering pipe 306 to form a complete ring pipe body to ensure the water flow is in a closed loop.

[0044] Phase 3: Flexible Pipeline Adjustment Phase (Adapting to Heat Exchange Needs) Increase heat exchange area: When the heat generation of electrolytic cell 1 increases or the heat exchange efficiency needs to be improved, it is not necessary to disassemble the entire piping system. Only the sealing parts of the target idle flange pipe seat B307 need to be removed, and the newly added covered pipe 306 is connected and fixed to the flange pipe seat B307 through the flange pipe seat C308; or two semi-annular covered pipes 306 are spliced ​​and welded and fixed to electrolytic cell 1, directly expanding the contact surface area between the waste heat recovery pipe and electrolytic cell 1. Reduce heat exchange area: When heat generation is reduced or energy consumption needs to be reduced, only the connecting bolts between the covered pipe 306 to be removed and the horizontal pipe A302 are removed, and the corresponding flange pipe seat B307 is sealed with a sealing component, without affecting the normal operation of other pipelines.

[0045] Phase Four: Pipeline Descaling and Maintenance Phase Descaling of transverse pipe A302: The operator inserts the drive device or hand tool into the insertion hole 402 at the end of the rotating rod 401, driving the rotating rod 401 to rotate inside the transverse pipe A302. The spiral scraper 403 fixed on the rotating rod 401 rotates synchronously, scraping the scale attached to the inner wall of the transverse pipe A302. The scraped scale is transported through the spiral structure of the spiral scraper 403 to the flange seat A305 or any flange seat B307 for discharge. Descaling of 306 coated tubes: Preparation: Remove the sealing seat 309 at the bottom of the covering tube 306, put the hollow magnetic arc part 404 into the covering tube 306, and then fix the sealing seat 309 again; connect magnet A408 and magnet B409 to the slot through the protrusion and symmetrically snap them on the outside of the covering tube 306. Cleaning operation: The operator holds magnets A408 and B409 and slides them along the circular track of the covering tube 306. The arc part 404 slides synchronously along the inner wall of the covering tube 306 under the magnetic attraction. The scraper 406 in the recessed groove 405 is always in close contact with the inner wall of the covering tube 306 under the elastic action of spring 407, and moves with the arc part 404 to clean the scale. Scale removal: The scale after cleaning is guided to the bottom along the annular covering tube 306 under the action of gravity. The scale can be discharged by removing the sealing seat 309, so as to avoid the scale from hindering heat transfer or affecting the smooth flow of water.

[0046] Phase 5: Continuous Operational Support The energy-saving pump works in conjunction with the optimized pipeline structure to reduce the energy consumption of water circulation; through regular descaling maintenance and flexible adjustment of the pipeline, the cleanliness of the inner wall of the pipeline and the reasonable heat exchange area are maintained, ensuring the long-term stability of waste heat recovery efficiency and guaranteeing the continuous and efficient operation of the entire device.

[0047] Please refer to the above work process. Figures 1 to 10 .

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump, comprising: The electrolytic cell (1) is characterized in that it further includes: a first component (3); The first component (3) includes symmetrically arranged slots (301) on the electrolytic cell (1), in which a transverse tube A (302) is snapped in one of the slots (301), a partition plate (303) is fixedly connected to the inner cavity of the transverse tube A (302), a water outlet (304) is fixedly connected to the tail end of the transverse tube A (302), a flange seat A (305) is fixedly connected to the outer wall of the front end of the transverse tube A (302), and a flange seat B (307) is fixedly connected to the inner annular wall of the transverse tube A (302) at equal intervals.

2. The waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump according to claim 1, characterized in that: The electrolytic cell (1) is fitted with a covering tube (306), and a flange seat C (308) is fixedly connected to the covering tube (306). The flange seat C (308) is symmetrically fixed on both sides of the covering tube (306) and connected to its inner cavity. The bottom of the covering tube (306) is fixedly connected to a sealing seat (309) by bolts, and a transverse tube B (310) is clamped in another clamping groove (301).

3. The waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump according to claim 1, characterized in that: It also includes the main pipe group (2); The main tube assembly (2) includes an inlet pipe (201), an outlet pipe (202), an oxygen outlet pipe (203), and a hydrogen outlet pipe (204) that are connected and fixed to the side wall of the electrolytic cell (1); the inlet pipe (201) and the outlet pipe (202) are located below the oxygen outlet pipe (203) and the hydrogen outlet pipe (204).

4. A waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump according to claim 1, characterized in that: It also includes a second component (4); The second component (4) includes a rotating rod (401) rotatably connected to the transverse tube A (302), with an insertion hole (402) at the end of the rotating rod (401), and a spiral scraper (403) fixedly connected to the rotating rod (401).

5. A waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump according to claim 2, characterized in that: An arc-shaped component (404) is slidably connected inside the covering tube (306). A recessed groove (405) is provided on the arc-shaped component (404). A scraper (406) is provided inside the recessed groove (405). A spring (407) is fixedly connected to the inner wall of the scraper (406). The other end of the spring (407) is fixedly connected to the wall of the recessed groove (405). Magnet A (408) and magnet B (409) are symmetrically snapped onto the covering tube (306). Magnet B (409) has a slot that is inserted and adapted to the protrusion on magnet A (408).

6. A waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump according to claim 1, characterized in that: The transverse pipe A (302) is divided into two chambers by the partition plate (303): a water injection chamber and a drainage chamber.

7. A waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump according to claim 5, characterized in that: The covering tube (306) is annular; the covering tube (306) and the sealing seat (309) are assembled to form an annular tube body.

8. A waste heat recovery device for electrolytic hydrogen production, gas supply, and heating with an energy-saving pump according to claim 5, characterized in that: The arc-shaped component (404) is magnetic and is hollow.

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