Intelligent hydrogen production equipment with alkali electrolytic water and resistance to start-stop

Abstract

The application discloses a kind of intelligent alkaline electrolytic water hydrogen production equipment resistant to start-stop, it is related to electrolytic water hydrogen production technical field, including a pair of end plate, a pair of end plate opposite face is opened with circular recess, the inside of circular recess is fixedly installed with polar plate, the bottom of one polar plate is connected with positive electrode connector, the bottom of another polar plate is connected with negative electrode connector;A plurality of polar frames are arranged between the pair of end plate, the inside of the polar frame is installed with electrolytic assembly, a pair of frame type sealing pads is arranged between the opposite faces of any pair of adjacent polar frames, and a fixed diaphragm is arranged between any pair of adjacent frame type sealing pads.The application constructs high-strength stable structure to resist start-stop impact, optimizes liquid supply and current collection design to ensure stable medium circulation, strengthens sealing protection to prevent leakage and gas mixing, optimizes electrolytic assembly adaptation parameter fluctuation, and improves electrolytic stability and hydrogen-oxygen separation efficiency under start-stop working condition.

Description

Technical Field

[0001] This invention relates to the field of water electrolysis hydrogen production technology, and in particular to an intelligent alkaline water electrolysis hydrogen production device that is resistant to start-stop cycles. Background Technology

[0002] Currently, alkaline water electrolysis for hydrogen production has become one of the mainstream directions in industrial hydrogen production. With its advantages of readily available raw materials, mature processes, and controllable costs, it is widely used in energy storage, chemical synthesis, and other fields. Existing technologies mainly focus on improving electrolysis efficiency and reducing energy consumption, with core aspects including electrode material modification, electrolyte system optimization, and electrolyzer structure integration.

[0003] Meanwhile, with the large-scale application of renewable energy, electrolysis equipment needs to adapt to the frequent start-up and shutdown conditions caused by energy fluctuations. Related technological explorations have been gradually carried out, but most of them focus on the optimization of electrical control systems. The systematic design of structural stability and media transmission coordination during start-up and shutdown is still in the improvement stage.

[0004] There are obvious shortcomings under frequent start-stop conditions: First, the structural stability is insufficient, making it difficult to withstand the impact of start-stop and easy for components to loosen; second, uneven electrolyte supply and poor gas discharge lead to reaction fluctuations during start-stop switching; third, the sealing and protection design is lacking, making it easy for electrolyte leakage or hydrogen-oxygen cross-contamination to occur. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art, and to propose an intelligent alkaline water electrolysis hydrogen production device that is resistant to start-stop.

[0006] To address the problems existing in the prior art, the present invention adopts the following technical solution: A start-stop resistant intelligent alkaline water electrolysis hydrogen production device includes a pair of end plates symmetrically placed front and back. Each pair of end plates has a circular groove on its opposite side. An electrode plate is fixedly installed inside each circular groove. A positive electrode connector is connected to the bottom of one electrode plate, and a negative electrode connector is connected to the bottom of the other electrode plate. A plurality of equally spaced pole frames are provided between a pair of end plates. An electrolysis component is installed inside each pole frame. A pair of frame-type sealing gaskets are provided between the opposite faces of any pair of adjacent pole frames. A fixed diaphragm is provided between any pair of adjacent frame-type sealing gaskets.

[0007] Preferably, each end plate has several evenly distributed fixing through holes, and a T-shaped sheath is fixedly inserted into the interior of each fixing through hole. A pair of T-shaped seats are fixedly provided at the bottom of each end plate.

[0008] Preferably, a plurality of double-ended screws are arranged in a circular pattern around the pole frame between a pair of end plates. An insulating sleeve is fitted on the middle section of each double-ended screw, and both ends of each double-ended screw pass through the corresponding T-shaped sheath and are threadedly locked and fixed with a self-locking nut.

[0009] Preferably, each of the end plates has a through-distributed electrolyte inlet at the bottom of its outer side. One of the electrolyte inlets has an inlet pipe installed at its outer port, and the other electrolyte inlet has an inlet branch pipe installed at its outer port. The outer end of the inlet branch pipe extends forward in a J-shape and communicates with the inlet pipe.

[0010] Preferably, each end plate has a hydrogen outlet and an oxygen outlet arranged side by side on the top of its outer side, and a pair of parallel U-shaped connecting pipes are arranged above a pair of end plates.

[0011] Preferably, one of the U-shaped connecting pipes has its two ends connected to the outer ports of a pair of hydrogen outlets, and a hydrogen output pipe is provided in the middle of the U-shaped connecting pipe. The other U-shaped connecting pipe has its two ends connected to the outer ports of a pair of oxygen outlets, and an oxygen output pipe is provided in the middle of the U-shaped connecting pipe.

[0012] Preferably, the bottom of the electrode frame is provided with a U-shaped through hole, which is connected to the electrolyte inlet. A pair of fixing vents are provided at the two corners of the top of the electrode frame. A pair of U-shaped grooves connected to the fixing vents are provided at the top of the front and rear sides of the electrode frame. The pair of fixing vents are respectively connected to the hydrogen outlet and the oxygen outlet.

[0013] Preferably, the inner diameter of the frame-shaped sealing gasket is smaller than the inner diameter of the pole frame. An electrolyte communication hole is provided at the bottom of the frame-shaped sealing gasket and the fixed diaphragm. The electrolyte communication hole is connected to the U-shaped through hole. A pair of communication vents are provided at the top of the frame-shaped sealing gasket and the fixed diaphragm. Each of the communication vents is connected to the fixed vent on the adjacent pole frame.

[0014] Preferably, the electrolysis assembly includes an alkaline diaphragm, a cathode plate, and an anode plate. The alkaline diaphragm is concentrically distributed in the center of the electrode frame. The cathode plate and the anode plate are respectively fixed on the front and rear sides of the alkaline diaphragm. A pair of symmetrically distributed support plates are respectively provided on the outer sides of the cathode plate and the anode plate.

[0015] Preferably, the support plate has a plurality of evenly distributed cross-shaped through holes, and a plurality of evenly distributed cross-shaped supports are fixed on the side of the support plate facing the cathode plate and the anode plate. The cross-shaped supports have a tapered and diverging structure, and the plurality of cross-shaped through holes correspond one-to-one with the plurality of cross-shaped supports.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, a high-strength overall structure is constructed by end plates, T-shaped sheaths and double-headed screws, which can withstand the mechanical impact of start-up and shutdown conditions; the dual-end synchronous liquid supply design ensures continuous electrolyte replenishment; the U-shaped connecting pipe realizes centralized hydrogen and oxygen flow; and the sealing gasket and diaphragm prevent leakage and cross-venting, thus comprehensively improving the stability of medium flow and structural reliability during start-up and shutdown. 2. In this invention, by optimizing the electrode frame flow structure and the composition of the electrolysis components, the problems of uneven electrolyte and poor gas discharge during start-up and shutdown are solved; the conical divergent cross support enhances the electrode plate support and electrolyte disturbance, adapts the electrolysis components to parameter fluctuations, ensures smooth connection of the electrolysis reaction, and significantly improves the hydrogen-oxygen separation efficiency and electrolysis stability under start-up and shutdown conditions. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of a pair of endplate structural frames of the present invention; Figure 4 For the present invention Figure 3 Explosion-proof diagram of the structure; Figure 5 This is a schematic diagram of several pole frames stacked together according to the present invention; Figure 6 This is an exploded view of a pair of pole frame structures of the present invention; Figure 7 This is an exploded view of the pair of support plate structures of the present invention; In the diagram, the numbers represent: 100, end plate; 101, T-shaped seat; 102, circular groove; 103, electrode plate; 104, positive electrode connector; 105, negative electrode connector; 106, T-shaped sheath; 107, double-ended screw; 108, insulating sleeve; 109, self-locking nut; 200, electrolyte inlet; 201, inlet pipe; 202, inlet branch pipe; 203, hydrogen outlet; 204, oxygen outlet; 205. 206. U-shaped connecting pipe; 207. Hydrogen output pipe; 208. Oxygen output pipe; 309. Electrode frame; 300. U-shaped through hole; 301. Fixing vent; 302. U-shaped groove; 303. Support plate; 304. Cross bracket; 305. Cathode plate; 306. Alkaline diaphragm; 307. Anode plate; 408. Frame-type sealing gasket; 401. Fixing diaphragm; 402. Electrolyte connecting hole; 403. Connecting vent. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Example 1: This example provides a start-stop resistant intelligent alkaline water electrolysis hydrogen production device. See [link to example]. Figures 1 to 7 Specifically, it includes a pair of symmetrically placed end plates 100. The opposite surfaces of the pair of end plates 100 are provided with circular grooves 102. The end plates 100 achieve stable installation of the electrode plates 103 through the circular grooves 102. With the help of the fixed through holes, T-shaped sleeves 106, T-shaped seats 101 and double-headed screws 107, a high-strength integral structure is formed, which can withstand the mechanical impact under start-up and shutdown conditions. Its integrated electrolyte inlet 200, hydrogen outlet 203 and oxygen outlet 204 provide a regular channel for medium transmission and ensure the flow stability during start-up and shutdown switching. Each circular groove 102 has an electrode plate 103 fixedly installed inside. The bottom of one electrode plate 103 is connected to a positive terminal 104, and the bottom of the other electrode plate 103 is connected to a negative terminal 105. The electrode plate 103, the positive terminal 104, and the negative terminal 105 work together to form a stable electric field circuit. The reliable wiring design of the positive terminal 104 and the negative terminal 105 ensures the continuity of the power supply connection, provides a continuous electric field basis for start-stop operation, and adapts to the electric field parameter stability requirements during start-stop process. A number of equally spaced electrode frames 300 are provided between a pair of end plates 100. The U-shaped through hole 301 at the bottom of the electrode frame 300 forms a through flow channel with the electrolyte inlet 200 and the electrolyte connecting hole 402. The fixed vent hole 302 and U-shaped groove 303 at the top cooperate with the connecting vent hole 403 to construct a hydrogen-oxygen separation channel, which solves the problems of uneven electrolyte flow and poor gas discharge during start-up and shutdown. Its internal structure provides precise installation space for the electrolysis component and ensures the stable operation of the electrolysis reaction. Each electrode frame 300 is equipped with an electrolysis component. A pair of frame-type sealing gaskets 400 are provided between the opposite faces of any pair of adjacent electrode frames 300. The frame-type sealing gaskets 400 achieve sealing protection through size adaptation to avoid electrolyte leakage and hydrogen-oxygen cross-contamination during start-up and shutdown. A fixed diaphragm 401 is provided between any pair of adjacent frame-type sealing gaskets 400. The fixed diaphragm 401, together with the electrolyte connecting hole 402 and the connecting vent hole 403, not only ensures the uniform distribution of electrolyte, but also realizes the independent connection of hydrogen and oxygen pathways, thereby improving the separation efficiency and sealing performance under start-up and shutdown conditions.

[0020] In the specific implementation process, such as Figure 3 and Figure 4As shown, each end plate 100 has a through-distributed electrolyte inlet 200 at the bottom of its outer side. One electrolyte inlet 200 has an inlet pipe 201 installed at its outer port, and the other electrolyte inlet 200 has an inlet branch pipe 202 installed at its outer port. The outer end of the inlet branch pipe 202 extends forward in a J-shape and connects with the inlet pipe 201. The inlet pipe 201 and the J-shaped inlet branch pipe 202 ensure that the electrolyte of the two end plates 100 is supplied synchronously, ensuring the continuity of electrolyte replenishment during start-up and shutdown. Each end plate 100 has a hydrogen outlet 203 and an oxygen outlet 204 arranged side by side on its outer top surface. Above each pair of end plates 100, there is a pair of parallel U-shaped connecting pipes 205. The two ends of one U-shaped connecting pipe 205 are connected to the outer ports of the pair of hydrogen outlets 203, and a hydrogen output pipe 206 is arranged through the middle of the U-shaped connecting pipe 205. The two ends of the other U-shaped connecting pipe 205 are connected to the outer ports of the pair of oxygen outlets 204, and an oxygen output pipe 207 is arranged through the middle of the U-shaped connecting pipe 205. The U-shaped connecting pipes 205 realize the centralized convergence of the two hydrogen outlets 203 and the two oxygen outlets 204, and together with the hydrogen output pipes 206 and the oxygen output pipes 207, realize the stable output of hydrogen and oxygen, which meets the continuous operation requirements of being resistant to start-stop.

[0021] It should be noted that: such as Figure 3 and Figure 4 As shown, each end plate 100 has several evenly distributed fixing through holes, and a T-shaped sleeve 106 is fixedly inserted into the interior of each fixing through hole. A pair of T-shaped seats 101 are fixedly installed at the bottom of each end plate 100. Several double-headed screws 107 are arranged in a circular pattern around the pole frame 300 between the pair of end plates 100. The double-headed screws 107, together with the self-locking nut 109, lock the end plate 100 and the pole frame 300, ensuring the stability of the overall structure under start-stop impact. Each double-ended screw 107 is fitted with an insulating sleeve 108 in the middle section. The insulating sleeve 108 prevents current leakage, improves the electrical safety of the equipment, and provides structural and electrical dual protection for start-stop operation. Both ends of each double-ended screw 107 pass through the corresponding T-shaped sheath 106 and are threadedly locked and fixed with the self-locking nut 109.

[0022] The working principle of this embodiment is as follows: the positive terminal of the power supply is securely connected to the positive terminal connector 104, and the negative terminal of the power supply is correspondingly connected to the negative terminal connector 105, so as to provide a stable electric field foundation for the equipment to withstand start-up and shutdown operation. Alkaline electrolyte is precisely injected into a pair of electrolyte inlets 200 through the inlet pipe 201 and the inlet branch pipe 202 to ensure the continuity and stability of electrolyte supply during start-up and shutdown switching. Under the synergistic regulation of the electrolysis components, the electrolyte undergoes a highly efficient electrolysis reaction. The components can adapt to parameter fluctuations under start-up and shutdown conditions, ensuring a smooth connection of the electrolysis process. The hydrogen produced by electrolysis is discharged in an orderly manner through a pair of hydrogen outlets 203, the corresponding U-shaped connecting pipe 205 and the hydrogen output pipe 206, while the oxygen is discharged smoothly through a pair of oxygen outlets 204, the corresponding U-shaped connecting pipe 205 and the oxygen output pipe 207, thus achieving efficient separation and stable output of hydrogen and oxygen, fully meeting the core design requirements of the equipment to withstand start-up and shutdown.

[0023] Example 2: Based on Example 1, this example optimizes the flow structure of the electrode frame 300, frame-type sealing gasket 400, and fixed diaphragm 401, and clarifies the specific composition of the electrolysis assembly. This solves the problems of uneven electrolyte flow, poor hydrogen-oxygen separation, and insufficient electrolytic stability under start-up and shutdown conditions. It also includes: In the specific implementation process, such as Figure 5 , Figure 6 and Figure 7 As shown, a U-shaped through hole 301 is provided at the bottom of the electrode frame 300, which is connected to the electrolyte inlet 200. A pair of fixed vent holes 302 are provided at the two corners of the top of the electrode frame 300. A pair of U-shaped grooves 303 connected to the fixed vent holes 302 are provided at the top of the front and rear sides of the electrode frame 300. The pair of fixed vent holes 302 are connected to the hydrogen outlet 203 and the oxygen outlet 204 respectively. The inner diameter of the frame-type sealing gasket 400 is smaller than that of the pole frame 300. The bottom of the frame-type sealing gasket 400 and the fixed diaphragm 401 is provided with an electrolyte communication hole 402, which is connected to the U-shaped through hole 301. The top of the frame-type sealing gasket 400 and the fixed diaphragm 401 is provided with a pair of communicating vent holes 403, and each communicating vent hole 403 is connected to the fixed vent hole 302 on the adjacent pole frame 300. The electrolysis assembly includes an alkaline diaphragm 307, a cathode plate 306, and an anode plate 308. The alkaline diaphragm 307 is concentrically distributed in the center of the electrode frame 300. The cathode plate 306 and the anode plate 308 are respectively fixed on the front and rear sides of the alkaline diaphragm 307. A pair of symmetrically distributed support plates 304 are respectively provided on the outer sides of the cathode plate 306 and the anode plate 308. The cathode plate 306 and the anode plate 308 provide the core site for the electrolysis reaction, and the alkaline diaphragm 307 optimizes the ion transport efficiency. The support plate 304 has several evenly distributed cross-shaped through holes. On the side of the support plate 304 facing the cathode plate 306 and the anode plate 308, several evenly distributed cross-shaped supports 305 are fixed. The cross-shaped supports 305 have a conical and divergent structure, and the several cross-shaped through holes correspond one-to-one with the several cross-shaped supports 305. The cross-shaped through holes and the conical and divergent cross-shaped supports 305 of the support plate 304 enhance the stability of electrolyte disturbance and electrode support, adapt to parameter fluctuations during start-up and shutdown, and ensure a smooth connection of the electrolysis reaction.

[0024] The working principle of this embodiment is as follows: Electrolyte is stably injected into a pair of electrolyte inlets 200 through the inlet pipe 201 and the inlet branch pipe 202. The electrolyte flows precisely into the U-shaped through hole 301 at the bottom of the electrode frame 300 with the help of the frame-type sealing gasket 400 and the electrolyte communication hole 402 at the bottom of the fixed diaphragm 401, and then passes through the cross through hole on the support plate 304, and makes full contact with the cathode plate 306 and anode plate 308 on both sides of the alkaline diaphragm 307 respectively. Meanwhile, relying on the through-hole 402 and the U-shaped through-hole 301, the electrolyte can be uniformly and continuously transferred to several electrode frames 300. With the synergistic effect of the cathode plate 306, anode plate 308 and alkaline diaphragm 307 in the electrolysis assembly, the electrolysis reaction can be carried out smoothly during the start-up and shutdown switching process. After the hydrogen generated by electrolysis is generated in the cathode plate 306, it flows into the hydrogen outlet 203 through the U-shaped groove 303 and the fixed gas hole 302 on one side of the electrode frame 300; after the oxygen is generated in the anode plate 308, it flows into the oxygen outlet 204 through the U-shaped groove 303 and the fixed gas hole 302 on the other side of the electrode frame 300. During this process, the connecting vents 403 at the top of the frame-type sealing gasket 400 and the fixed diaphragm 401 enable the connection of the corresponding vents in the adjacent pole frames 300, ensuring that hydrogen and oxygen gases form continuous pathways. Finally, hydrogen is stably discharged through a pair of hydrogen outlets 203, the corresponding U-shaped connecting pipe 205 and the hydrogen output pipe 206, and oxygen is stably discharged through a pair of oxygen outlets 204, the corresponding U-shaped connecting pipe 205 and the oxygen output pipe 207, fully meeting the requirements of start-stop resistant operating conditions.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A start-stop resistant intelligent alkaline water electrolysis hydrogen production device, comprising a pair of end plates (100) symmetrically placed front and rear, characterized in that: A pair of end plates (100) have circular grooves (102) on their opposite sides. Each circular groove (102) has an electrode plate (103) fixedly installed inside it. One electrode plate (103) is connected to a positive electrode connector (104) at its bottom, and the other electrode plate (103) is connected to a negative electrode connector (105) at its bottom. A plurality of pole frames (300) are provided between a pair of end plates (100), and an electrolysis assembly is installed inside each pole frame (300). A pair of frame-type sealing gaskets (400) are provided between the opposite faces of any pair of adjacent pole frames (300), and a fixed diaphragm (401) is provided between any pair of adjacent frame-type sealing gaskets (400).

2. The intelligent alkaline water electrolysis hydrogen production equipment with start-stop resistance according to claim 1, characterized in that: The end plate (100) has several fixed through holes, and a T-shaped sleeve (106) is fixedly inserted inside the fixed through holes. A pair of T-shaped seats (101) are fixedly provided at the bottom of the end plate (100).

3. The intelligent alkaline water electrolysis hydrogen production equipment with start-stop resistance according to claim 2, characterized in that: A plurality of double-ended screws (107) are provided between a pair of end plates (100). An insulating sleeve (108) is fitted on the middle section of the double-ended screw (107). The two ends of the double-ended screw (107) pass through the corresponding T-shaped sheath (106) and are threadedly locked and fixed with a self-locking nut (109).

4. The intelligent alkaline water electrolysis hydrogen production equipment with start-stop resistance according to claim 1, characterized in that: Each end plate (100) has an electrolyte inlet (200) at the bottom of its outer side. One electrolyte inlet (200) has an inlet pipe (201) installed at its outer port, and the other electrolyte inlet (200) has an inlet branch pipe (202) installed at its outer port. The outer end of the inlet branch pipe (202) extends forward in a J-shape and communicates with the inlet pipe (201).

5. The intelligent alkaline water electrolysis hydrogen production equipment with start-stop resistance according to claim 4, characterized in that: The top of the outer side of the end plate (100) is provided with a hydrogen outlet (203) and an oxygen outlet (204), and a pair of U-shaped connecting pipes (205) are provided above the pair of end plates (100).

6. The intelligent alkaline water electrolysis hydrogen production equipment with start-stop resistance according to claim 5, characterized in that: One of the U-shaped connecting pipes (205) is connected at both ends to the outer ports of a pair of hydrogen outlets (203), and a hydrogen output pipe (206) is provided in the middle of the U-shaped connecting pipe (205). The other U-shaped connecting pipe (205) is connected at both ends to the outer ports of a pair of oxygen outlets (204), and an oxygen output pipe (207) is provided in the middle of the U-shaped connecting pipe (205).

7. The intelligent alkaline water electrolysis hydrogen production equipment with start-stop resistance according to claim 5, characterized in that: The bottom of the electrode frame (300) is provided with a U-shaped through hole (301), which is connected to the electrolyte inlet (200). A pair of fixed vent holes (302) are provided at the two corners of the top of the electrode frame (300). A pair of U-shaped grooves (303) connected to the fixed vent holes (302) are provided at the top of the front and rear sides of the electrode frame (300). The pair of fixed vent holes (302) are connected to the hydrogen outlet (203) and the oxygen outlet (204) respectively.

8. The intelligent alkaline water electrolysis hydrogen production equipment with start-stop resistance according to claim 7, characterized in that: The bottom of the frame-type sealing gasket (400) and the fixed diaphragm (401) is provided with an electrolyte communication hole (402), which is connected to the U-shaped through hole (301). The top of the frame-type sealing gasket (400) and the fixed diaphragm (401) is provided with a pair of communication vents (403), and each of the communication vents (403) is connected to the fixed vent (302) on the adjacent pole frame (300).

9. The intelligent alkaline water electrolysis hydrogen production equipment with start-stop resistance according to claim 1, characterized in that: The electrolysis assembly includes an alkaline diaphragm (307), a cathode plate (306), and an anode plate (308). The alkaline diaphragm (307) is fixed in the middle of the electrode frame (300). The cathode plate (306) and the anode plate (308) are fixed on the front and rear sides of the alkaline diaphragm (307), respectively. A pair of support plates (304) are respectively provided on the outer sides of the cathode plate (306) and the anode plate (308).

10. A start-stop resistant intelligent alkaline water electrolysis hydrogen production device according to claim 9, characterized in that: The support plate (304) has several cross-shaped through holes. Several cross-shaped supports (305) are fixed on one side of the support plate (304) facing the cathode plate (306) and the anode plate (308). The cross-shaped supports (305) have a tapered and divergent structure, and the several cross-shaped through holes correspond one-to-one with the several cross-shaped supports (305).

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