An external circulation filtering liquid feeding device applied to a water electrolysis hydrogen-oxygen generator

Abstract

The application discloses an external circulation filtering liquid adding device applied to a water electrolysis hydrogen oxygen generator, which comprises a rack, a liquid adding tank, a control valve, a first filter, a circulating pump, an electrolyte concentration detector, a filter assembly and an electric control box, the liquid adding tank is fixed in the rack, the liquid adding tank comprises a liquid adding pipeline, the control valve is arranged on the liquid adding pipeline, the first filter is communicated with the water electrolysis hydrogen oxygen generator, a liquid conveying pipeline is connected to the first filter, the liquid conveying pipeline is communicated with the liquid adding pipeline, the circulating pump is connected to the liquid conveying pipeline, the electrolyte concentration detector is connected to the outlet of the circulating pump, the filter assembly is connected to the outlet of the electrolyte concentration detector, the outlet of the filter assembly is connected to the liquid inlet of the water electrolysis hydrogen oxygen generator, and the electric control box is electrically connected with the electrolyte concentration detector and the control valve respectively. The application aims at solving the problem that the existing external circulation filtering liquid adding device of the water electrolysis hydrogen oxygen generator cannot automatically supplement electrolyte concentration.

Description

Technical Field

[0001] This application relates to the field of water electrolysis hydrogen production technology, and in particular to an external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator. Background Technology

[0002] A water electrolysis hydrogen-oxygen generator is a device that converts electrical energy into hydrogen and oxygen through the electrolysis of water. Its core component is the electrolytic cell. Water electrolysis hydrogen-oxygen generators typically use KOH / NaOH as the electrolyte. During normal operation, the K in the electrolyte... + / Na + Ions themselves do not participate in consumption, but the high temperature generated during equipment operation will cause some of the electrolyte to evaporate and be carried out of the electrolytic cell along with the produced hydrogen and oxygen, resulting in a decrease in electrolyte concentration; at the same time, the electrolysis process will also continuously consume water, so the equipment needs to be replenished with electrolyte regularly.

[0003] Existing technology proposes using an external circulation filtration and dosing device to replenish the electrolyte in a water electrolysis hydrogen-oxygen generator. However, this device cannot automatically replenish the electrolyte concentration when it is insufficient for the generator's operation. Instead, the filtered electrolyte must first be placed in an alkaline solution tank, and solid KOH / NaOH must be added to bring the concentration to the required level before the electrolyte is added to the generator. Due to the properties of KOH / NaOH, electrolyte preparation requires a specific location; furthermore, electrolyte preparation is exothermic and requires cooling before use, consuming time. Utility Model Content

[0004] The main objective of this application is to provide an external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator, which aims to solve the problem that existing external circulation filtration and liquid addition devices for water electrolysis hydrogen-oxygen generators cannot automatically replenish the electrolyte concentration when the electrolyte concentration is insufficient for the use of the water electrolysis hydrogen-oxygen generator.

[0005] To achieve the above objectives, this application provides an external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator, comprising: a frame, a liquid addition tank, a control valve, a first filter, a circulation pump, an electrolyte concentration detector, a filter assembly, and an electrical control box. The liquid addition tank is fixed within the frame and includes a liquid addition pipe. The control valve is disposed on the liquid addition pipe. The inlet of the first filter is connected to the outlet of the water electrolysis hydrogen-oxygen generator via a pipe, and the outlet of the first filter is connected to a delivery pipe, which is connected to the liquid addition pipe. The circulation pump is connected to the delivery pipe and is used to draw electrolyte from the water electrolysis hydrogen-oxygen generator through the delivery pipe. With the control valve open, electrolyte is drawn from the addition tank through the addition pipeline; the electrolyte concentration detector is connected to the outlet of the circulation pump through a pipeline to detect the concentration of the electrolyte drawn by the circulation pump; the filter assembly is connected to the outlet of the electrolyte concentration detector to filter impurities in the electrolyte flowing out of the electrolyte concentration detector, and the outlet of the filter assembly is connected to the inlet of the water electrolysis hydrogen-oxygen generator; the electrical control box is installed inside the frame, and the electrical control box is electrically connected to the electrolyte concentration detector and the control valve respectively, and the electrical control box is used to communicate with the electrolyte concentration detector to control the opening and closing of the control valve.

[0006] Optionally, a drain valve is provided on the pipeline between the electrolyte tank and the control valve to discharge the electrolyte to the outside.

[0007] Optionally, a ball valve is also provided on the pipeline between the liquid filling tank and the control valve to control the opening and closing of the pipeline between the liquid filling tank and the control valve.

[0008] Optionally, the filter assembly includes a second filter and a third filter, wherein one end of the second filter is connected to the electrolyte concentration detector, the other end is connected to one end of the third filter, and the other end of the third filter is connected to the inlet of the water electrolysis hydrogen-oxygen generator.

[0009] Optionally, the second filter is a 5μm filter; the third filter is a 1μm filter.

[0010] Optionally, the electrical control box includes a touch screen, a PLC unit, and a relay. The touch screen and the relay are electrically connected to the PLC unit. The control valve and the electrolyte concentration detector are electrically connected to the PLC unit respectively, so as to transmit the detection data to the electrical control box for judgment. The judgment result of the electrical control box is transmitted to the control valve through the PLC unit to control the opening and closing of the control valve.

[0011] Optionally, the electrolyte concentration detector is connected to the PLC unit via a cable; the control valve is connected to the PLC unit via a cable.

[0012] Optionally, the bottom of the frame is provided with multiple casters for moving the filtration and liquid dispensing device.

[0013] Optionally, the inner core of both the second filter and the third filter is a filter element.

[0014] This application discloses an external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator. When the water electrolysis hydrogen-oxygen generator starts working, the electrolyte flows out from the outlet and first enters the first filter for preliminary filtration to remove larger particles of impurities. After preliminary filtration, the electrolyte enters the circulation pump through the delivery pipeline. After the circulation pump starts, it draws the electrolyte from the delivery pipeline and delivers it to the electrolyte concentration detector. The electrolyte concentration detector detects the concentration of the flowing electrolyte and transmits the detected concentration information to the electrical control box in real time. The electrical control box analyzes and judges the received concentration information according to a preset concentration range. If the electrolyte concentration is lower than the set value, the electrical control box controls the control valve to open, allowing the electrolyte in the addition tank to be added to the delivery pipeline at the outlet of the first filter through the addition pipeline to adjust the electrolyte concentration; if the electrolyte concentration is within the set range, the control valve remains closed. The electrolyte continues to flow into the filter assembly, where the filter assembly performs deep filtration to further remove minute impurities and ensure the purity of the electrolyte. Finally, the deeply filtered electrolyte of appropriate concentration flows out from the outlet of the filter assembly and into the inlet of the water electrolysis hydrogen-oxygen generator, completing the entire external circulation filtration and electrolyte addition process. Throughout the process, the filtration and electrolyte addition device automatically detects the electrolyte concentration and controls the addition in real time, requiring no manual intervention, effectively reducing the workload of operators and saving a significant amount of time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator, provided in an embodiment of this application.

[0016] In the diagram, 1. First filter; 2. Control valve; 3. Ball valve; 4. Discharge valve; 5. Addition tank; 6. Electrolyte concentration detector; 7. Circulation pump; 8. Electrical control box; 9. Second filter; 10. Third filter; 11. Frame.

[0017] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] Please see Figure 1This application provides an external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator. This device may include: a frame 11, a liquid addition tank 5, a control valve 2, a first filter 1, a circulation pump 7, an electrolyte concentration detector 6, a filter assembly, and an electrical control box 8. The liquid addition tank 5 is fixed within the frame 11 and includes a liquid addition pipe. The control valve 2 is mounted on the liquid addition pipe. The inlet of the first filter 1 is connected to the outlet of the water electrolysis hydrogen-oxygen generator via a pipe, and the outlet of the first filter 1 is connected to a delivery pipe, which is connected to the liquid addition pipe. The circulation pump 7 is connected to the delivery pipe and is used to pump liquid through the delivery pipe. The system draws electrolyte from the water electrolysis hydrogen-oxygen generator and, when the control valve is open, draws electrolyte from the addition tank 5 through the addition pipeline; the electrolyte concentration detector 6 is connected to the outlet of the circulation pump 7 through a pipeline to detect the concentration of the electrolyte drawn by the circulation pump 7; the filter assembly is connected to the outlet of the electrolyte concentration detector 6 to filter impurities in the electrolyte flowing out of the electrolyte concentration detector 6, and the outlet of the filter assembly is connected to the inlet of the water electrolysis hydrogen-oxygen generator; the electrical control box 8 is installed inside the frame 11, and the electrical control box 8 is electrically connected to the electrolyte concentration detector 6 and the control valve 2 respectively. The electrical control box 8 is used to communicate with the electrolyte concentration detector 6 to control the opening and closing of the control valve 2.

[0023] In this embodiment, when the water electrolysis hydrogen-oxygen generator starts working, the electrolyte flows out from the outlet and first enters the first filter 1 for preliminary filtration to remove larger particles of impurities. After preliminary filtration, the electrolyte enters the circulation pump 7 through the delivery pipeline. After the circulation pump 7 starts, it draws the electrolyte from the delivery pipeline and delivers it to the electrolyte concentration detector 6. The electrolyte concentration detector 6 detects the concentration of the flowing electrolyte and transmits the detected concentration information to the electrical control box 8 in real time. The electrical control box 8 analyzes and judges the received concentration information according to the preset concentration range. If the electrolyte concentration is lower than the set value, the electrical control box 8 controls the control valve 2 to open, so that the electrolyte in the addition tank 5 is added to the delivery pipeline at the outlet of the first filter 1 through the addition pipeline to adjust the electrolyte concentration; if the electrolyte concentration is within the set range, the control valve 2 remains closed. The electrolyte continues to flow into the filter assembly, where the filter assembly performs deep filtration to further remove tiny impurities and ensure the purity of the electrolyte. Finally, the deeply filtered electrolyte of appropriate concentration flows out from the outlet of the filter assembly and into the inlet of the water electrolysis hydrogen-oxygen generator, completing the entire external circulation filtration and electrolyte addition process. Throughout the process, the filtration and electrolyte addition device automatically detects the electrolyte concentration and controls the addition in real time, requiring no manual intervention, effectively reducing the workload of operators and saving a significant amount of time.

[0024] It should be noted that when the electrolyte concentration detector 6 detects the concentration of the electrolyte flowing through it, it feeds back the detected concentration value to the control box 8 and compares it with the upper and lower concentration limits. If the detected concentration value is greater than the lower concentration limit, the control valve 2 does not work; if the upper concentration limit is greater than or equal to the detected concentration value and greater than the lower concentration limit, the control valve 2 also does not work; if the detected concentration value is less than or equal to the lower concentration limit, the control valve 2 opens. High-concentration electrolyte is added to the original electrolyte to achieve a replenishment effect. Once the concentration continuously exceeds the set upper concentration limit, the control valve 2 closes and the replenishment stops.

[0025] In addition, the first filter 1 is a magnetic Y-type filter. The electrode plate of the electrolytic cell, an important component of the water electrolysis hydrogen-oxygen generator, is formed by electroplating a multi-element nickel alloy onto a Q235 substrate. During the continuous operation of the water electrolysis hydrogen-oxygen generator, the electroplating layer may peel off due to the influence of water quality, and the substrate may corrode, resulting in residual metal impurities in the electrolyte. The magnetic Y-type filter can remove these impurities.

[0026] Please see Figure 1 In some possible implementations, a drain valve 4 is provided on the pipeline between the liquid tank 5 and the control valve 2 to discharge the electrolyte to the outside.

[0027] When it is necessary to drain the electrolyte in the filling tank 5, the operator only needs to open the drain valve 4, and the electrolyte in the filling tank 5 will flow out to a designated external location through the valve. This design makes the operation of the electrolyte in the filling tank 5 more flexible and convenient. After completing the relevant operations, closing the drain valve 4 will restore the device to normal operation.

[0028] Please see Figure 1 In some possible implementations, a ball valve 3 is also provided on the pipeline between the liquid filling tank 5 and the control valve 2 to control the opening and closing of the pipeline between the liquid filling tank 5 and the control valve 2.

[0029] Specifically, the ball valve 3 allows operators to flexibly control the flow of the pipeline between the electrolyte tank 5 and the control valve 2 according to actual needs. When electrolyte needs to be added to the device, the ball valve 3 is opened to connect the pipeline; when the electrolyte tank 5 malfunctions or when the electrolyte in the electrolyte tank 5 is depleted and needs to be replenished, the ball valve 3 needs to be closed, thereby ensuring the normal operation and safety of the device.

[0030] Please see Figure 1 In some possible implementations, the filter assembly may include a second filter 9 and a third filter 10, wherein one end of the second filter 9 is connected to the electrolyte concentration detector 6 and the other end is connected to one end of the third filter 10, and the other end of the third filter 10 is connected to the inlet of the water electrolysis hydrogen-oxygen generator.

[0031] In this embodiment, after the electrolyte flows out of the electrolyte concentration detector 6, it first enters the second filter 9 for preliminary deep filtration to remove some minute impurities. The electrolyte after filtration by the second filter 9 then flows into the third filter 10, which further refines the filtration, ensuring that as many impurities as possible are removed. This results in a high purity electrolyte entering the inlet of the water electrolysis hydrogen-oxygen generator, thus guaranteeing the normal operation and gas production efficiency of the generator. This multi-stage filtration design effectively improves the filtration effect.

[0032] Furthermore, in some possible implementations, the second filter 9 is a 5μm filter; the third filter 10 is a 1μm filter.

[0033] Specifically, the 5μm second filter 9 can intercept most impurity particles larger than 5μm, performing preliminary fine filtration of the electrolyte and reducing the burden on subsequent filtration. The 1μm third filter 10 can further filter the electrolyte after the second filter 9, removing smaller impurities, such as those between 1μm and 5μm in diameter. This results in a purer electrolyte that ultimately enters the water electrolysis hydrogen-oxygen generator, effectively reducing damage to core components such as the electrolyzer, extending the equipment's lifespan, and improving the efficiency and quality of hydrogen production through water electrolysis.

[0034] Please see Figure 1 In some possible implementations, the electrical control box 8 includes a touch screen, a PLC unit, and a relay. The touch screen and the relay are electrically connected to the PLC unit. The control valve 2 and the electrolyte concentration detector 6 are electrically connected to the PLC unit respectively, so as to transmit the detection data to the electrical control box 8 for judgment. The judgment result of the electrical control box 8 is transmitted to the control valve 2 through the PLC unit to control the opening and closing of the control valve 2.

[0035] In actual operation, operators can set parameters for the electrical control box 8 via the touchscreen, such as setting the electrolyte concentration range. The electrolyte concentration detector 6 transmits the detected electrolyte concentration data to the PLC unit in real time. The PLC unit analyzes and judges the data according to the preset program and parameters. When it is determined that the electrolyte concentration does not meet the requirements, the PLC unit controls the relay, which in turn controls the opening and closing of the control valve 2 to achieve automatic electrolyte addition. This control method makes the operation of the entire filtration and liquid addition device simpler and more precise, improving the automation level and reliability of the device.

[0036] Furthermore, in some possible implementations, the electrolyte concentration detector 6 is connected to the PLC unit via a cable; the control valve 2 is connected to the PLC unit via a cable.

[0037] Specifically, the cable connection method has advantages such as stable signal transmission and strong anti-interference ability. It can ensure that the concentration signal detected by the electrolyte concentration detector 6 is accurately transmitted to the PLC unit, and at the same time, the control signal issued by the PLC unit can be stably transmitted to the control valve 2, ensuring the stable operation and precise control of the entire device.

[0038] Furthermore, in some possible implementations, the bottom of the frame 11 is provided with multiple casters for moving the filter dosing device.

[0039] In practical applications, the omnidirectional wheels allow operators to easily push the device to a designated location, greatly improving its mobility and ease of use.

[0040] Furthermore, in some possible implementations, the inner cores of both the second filter 9 and the third filter 10 are filter elements.

[0041] Among them, the filter element has the advantage of high filtration accuracy. As the inner core of the second filter 9 and the third filter 10, the filter element can effectively filter impurities in the electrolyte, while ensuring the stable flow of the electrolyte during the filtration process, and will not affect the normal operation of the device.

[0042] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator, characterized in that, include: Rack (11); A liquid filling tank (5) is fixed inside the frame (11), and the liquid filling tank (5) includes a liquid filling pipe; Control valve (2) is installed on the liquid addition pipeline; The first filter (1) has its inlet connected to the outlet of the water electrolysis hydrogen-oxygen generator via a pipe, and its outlet is connected to a delivery pipe, which is connected to the liquid addition pipe. A circulating pump (7) is connected to the infusion pipeline and is used to draw electrolyte from the water electrolysis hydrogen-oxygen generator through the infusion pipeline, and to draw electrolyte from the infusion tank (5) through the infusion pipeline when the control valve (2) is open. An electrolyte concentration detector (6) is connected to the outlet of the circulating pump (7) via a pipeline and is used to detect the concentration of the electrolyte drawn by the circulating pump (7). A filter assembly is connected to the outlet of the electrolyte concentration detector (6) and is used to filter impurities in the electrolyte flowing out of the electrolyte concentration detector (6). The outlet of the filter assembly is connected to the inlet of the water electrolysis hydrogen-oxygen generator. An electrical control box (8) is installed inside the frame (11). The electrical control box (8) is electrically connected to the electrolyte concentration detector (6) and the control valve (2) respectively. The electrical control box (8) is used to communicate with the electrolyte concentration detector (6) to control the opening and closing of the control valve (2).

2. The external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator according to claim 1, characterized in that, A drain valve (4) is installed on the pipeline between the liquid tank (5) and the control valve (2) to discharge the electrolyte to the outside.

3. The external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator according to claim 2, characterized in that, A ball valve (3) is also provided on the pipeline between the liquid filling tank (5) and the control valve (2) for controlling the opening and closing of the pipeline between the liquid filling tank (5) and the control valve (2).

4. The external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator according to claim 1, characterized in that, The filter assembly includes a second filter (9) and a third filter (10); One end of the second filter (9) is connected to the electrolyte concentration detector (6), and the other end is connected to one end of the third filter (10). The other end of the third filter (10) is connected to the inlet of the water electrolysis hydrogen-oxygen generator.

5. The external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator according to claim 4, characterized in that, The second filter (9) is a 5μm filter; the third filter (10) is a 1μm filter.

6. The external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator according to claim 1, characterized in that, The electrical control box (8) includes a touch screen, a PLC unit, and a relay. The touch screen and the relay are electrically connected to the PLC unit. The control valve (2) and the electrolyte concentration detector (6) are electrically connected to the PLC unit respectively, so as to transmit the detection data to the electrical control box (8) for judgment. The judgment result of the electrical control box (8) is transmitted to the control valve (2) through the PLC unit to control the opening and closing of the control valve (2).

7. The external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator according to claim 6, characterized in that, The electrolyte concentration detector (6) is connected to the PLC unit via a cable; the control valve (2) is connected to the PLC unit via a cable.

8. The external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator according to any one of claims 1 to 7, characterized in that, The bottom of the frame (11) is provided with multiple casters for moving the filtration and liquid addition device.

9. The external circulation filtration and liquid addition device for a water electrolysis hydrogen-oxygen generator according to claim 4, characterized in that, The inner cores of the second filter (9) and the third filter (10) are both filter elements.

Images