Electrolytic bath heating equipment for cold start of AEM hydrogen production equipment

Abstract

The utility model discloses electrolytic bath heating equipment for cold start of AEM hydrogen production equipment. The electrolytic bath heating equipment comprises a heating water tank and an electric heater, the whole heating water tank is a rectangular shell, the electric heater comprises a junction box and a heating pipe, the junction box is fixedly installed on the left side of the top of the heating water tank, the heating pipe is located in the heating water tank, the top of the heating pipe is connected to the lower portion of the junction box, the heating pipe comprises a coil pipe part, and a heat conduction plate is fixedly connected to the coil pipe part; the heat conducting plate is fixedly mounted in the heating water tank through a plurality of groups of fixing brackets; water in the electrolytic bath is rapidly heated through the heating water tank, and the working temperature condition of the electrolytic bath can be rapidly met; compared with a traditional heating mode, the starting speed of the cold machine is greatly increased, the time needed by equipment from starting to normal operation is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of water electrolysis hydrogen production equipment, specifically an electrolysis cell heating device for cold start of AEM hydrogen production equipment. Background Technology

[0002] AEM electrolysis is an anion exchange membrane electrolysis technology for hydrogen production. Its principle is to use anion exchange membrane as an electrolyte to produce hydrogen gas by electrolyzing water. The main structure consists of anion exchange membrane and two transition metal catalytic electrodes. Pure water or a low-concentration alkaline solution is generally used as the electrolyte.

[0003] For example, our company's earlier patent application, authorized publication number CN118407068B, discloses a dual-alkaline coupling hydrogen production and collection device, relating to the field of water electrolysis hydrogen production technology. This invention provides a dual-alkaline coupling hydrogen production and collection device, including a base plate, an AEM electrolyzer fixedly connected to the base plate, a coupling controller fixedly connected to the base plate, the coupling controller being connected to the AEM electrolyzer via wires, an alkaline electrolyzer fixedly connected to the base plate, the alkaline electrolyzer being connected to the coupling controller via wires, and a gas supply pipe connecting the alkaline electrolyzer and the AEM electrolyzer. The coupling controller distributes electrical energy to the AEM electrolyzer and the alkaline electrolyzer for simultaneous hydrogen production.

[0004] In the aforementioned patented hydrogen production process, the coupling controller automatically adjusts the operating status of the alkaline electrolyzer and the AEM electrolyzer according to the actual load of the new energy power generation. The alkaline hydrogen production technology has a low cost, while the PEM hydrogen production technology plays a regulatory role when the load fluctuates, reducing the overall hydrogen production cost while maintaining stable hydrogen production efficiency. However, the disadvantage of the aforementioned patent is that the cold start speed is relatively slow. The alkaline electrolyzer is a cold start, which takes about 120 minutes to raise the temperature of the alkaline solution in the alkaline electrolyzer to the normal operating temperature of above 85°C.

[0005] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this invention is to provide an electrolyzer heating device for cold start of an AEM hydrogen production equipment, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A heating device for an electrolyzer used in the cold start of an AEM hydrogen production unit includes a heating water tank and an electric heater. The heating water tank is a rectangular shell. The electric heater includes a junction box and a heating tube. The junction box is fixedly installed on the top left side of the heating water tank. The heating tube is located inside the heating water tank, with its top connected to the bottom of the junction box. The heating tube includes a coil section, on which a heat-conducting plate is fixedly connected. The heat-conducting plate is fixedly installed inside the heating water tank by multiple sets of fixing brackets. The fixing brackets include a base and side frames. Several side frames are spaced along the front-back direction on the base, and the side frames are perpendicular to the base. The base is fixedly welded to the inner wall of the heating water tank, and the side frames are fixedly connected to the heat-conducting plate by bolts. A cold water inlet is provided on the top right side of the heating water tank, and a hot water outlet is provided on the lower left side of the heating water tank. A drain pipe is connected to the hot water outlet and is connected to the AEM electrolyzer.

[0009] Furthermore, the heating tubes are provided in multiple forms, and the multiple heating tubes are evenly spaced along the front-to-back direction.

[0010] Furthermore, since there are a total of 6 heating tubes, there are also 6 heat-conducting plates.

[0011] Furthermore, a slot is provided on one side of the side frame, and the edge of the heat-conducting plate is inserted into the slot. At the same time, the side frame has through holes along the front-back direction for bolts to pass through, and the edge of the heat-conducting plate also has through holes for bolts to pass through.

[0012] Furthermore, the cold water inlet is connected to the water pump's drain outlet via an inlet pipe, and the water pump's inlet is also connected to the AEM electrolysis cell via a pipeline.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] Avoid damage to the electrolytic cell;

[0015] The heating water tank and the AEM electrolyzer form a circulation system. The water pump and electric heater start simultaneously, allowing water from the heating tank to flow into the AEM electrolyzer during the initial heating phase. This gradually replaces the water in the electrolyzer with heated water, heating it to above 85°C, rather than directly introducing water at 85°C. This method avoids damage to the electrolyzer caused by drastic temperature fluctuations, extends its lifespan, and reduces equipment maintenance costs and replacement frequency.

[0016] Ensure uniform water temperature;

[0017] An external heating water tank, combined with a water pump, heats the water, ensuring a uniform temperature throughout the electrolyzer and preventing localized overheating. This uniform water temperature contributes to stable electrolyzer operation, improves hydrogen production efficiency and quality, and reduces potential safety hazards caused by localized overheating, thus guaranteeing the safe and stable operation of the equipment.

[0018] Improve cold start speed;

[0019] By rapidly heating the water (alkali solution) in the electrolytic cell using a heating tank, the operating temperature requirements of the electrolytic cell can be quickly met. Compared to traditional heating methods, this significantly improves the speed of cold start-up, reduces the time required for the equipment to go from startup to normal operation, increases production efficiency, reduces time costs, and enhances the applicability and competitiveness of the equipment in actual production. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an electrolyzer heating device for cold start of an AEM hydrogen production equipment.

[0021] Figure 2 This is a front view of an electrolyzer heating device for cold start of an AEM hydrogen production plant.

[0022] Figure 3 This is a side view of an electrolyzer heating device for cold start of an AEM hydrogen production equipment.

[0023] Figure 4 This is a top view of an electrolyzer heating device for cold start of an AEM hydrogen production equipment.

[0024] Figure 5 This is a schematic diagram of the internal structure of an electrolyzer heating device for cold start of an AEM hydrogen production equipment.

[0025] Figure 6 This is a schematic diagram of the electric heater in the electrolyzer heating device for cold start of an AEM hydrogen production equipment.

[0026] Figure 7 for Figure 6 A magnified view of a portion of point a. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0028] Please see Figure 1-7 An electrolyzer heating device for cold start of an AEM hydrogen production unit includes a heating water tank 1 and an electric heater 2. The heating water tank 1 is generally rectangular. The electric heater 2 includes a junction box 201 and a heating tube 202. The junction box 201 is fixedly installed on the top left side of the heating water tank 1. The heating tube 202 is located inside the heating water tank 1, and its top is connected to the bottom of the junction box 201.

[0029] The heating tube 202 is provided in multiple ways, and the multiple heating tubes 202 are evenly spaced along the front-back direction. Each heating tube 202 includes a coil section 203, and a heat-conducting plate 204 is fixedly connected to the coil section 203. The heat-conducting plate 204 not only conducts heat, but also supports the coil section 203.

[0030] The heat-conducting plate 204 is fixedly installed inside the heating water tank 1 by multiple sets of fixing brackets 205. The fixing brackets 205 include a base 206 and side brackets 207. Several side brackets 207 are arranged at intervals along the front-back direction on the base 206, and the side brackets 207 are arranged perpendicular to the base 206. The base 206 is fixedly welded to the inner wall of the heating water tank 1, and the side brackets 207 are fixedly connected to the heat-conducting plate 204 by bolts 209.

[0031] Specifically, a slot 208 is provided on one side of the side frame 207, and the edge of the heat-conducting plate 204 is inserted into the slot 208. At the same time, the side frame 207 is provided with through holes for bolts 209 to pass through along the front-back direction, and the edge of the heat-conducting plate 204 is also provided with through holes for bolts 209 to pass through.

[0032] In this design, there are a total of 6 heating tubes 202, and therefore 6 heat-conducting plates 204; cold water is heated as it passes through both sides of the heat-conducting plates 204.

[0033] In this design, a cold water inlet 3 is provided on the top right side of the heating water tank 1, and a hot water outlet 4 is provided on the lower left side of the heating water tank 1.

[0034] A drain pipe 401 is connected to the hot water outlet 4, and the drain pipe 401 is connected to the AEM electrolytic cell (not shown in the figure);

[0035] The cold water inlet 3 is connected to the drain outlet of the water pump 302 via the inlet pipe 301, and the inlet of the water pump 302 is also connected to the AEM electrolytic cell (not shown in the figure) via a pipeline.

[0036] The heating water tank 1 and the AEM electrolysis cell form a circulation system for heating the water inside the AEM electrolysis cell. Simultaneously, when this invention is in use, the water pump and electric heater 2 are activated, causing the water inside the AEM electrolysis cell to flow with the water in the heating water tank 1. This arrangement allows the water in the heating water tank 1 to flow into the AEM electrolysis cell during the initial heating stage, enabling the water in the AEM electrolysis cell to be gradually replaced by heated water, ultimately reaching a temperature above 85°C; rather than directly introducing 85°C water into the AEM electrolysis cell. This avoids drastic temperature fluctuations that could damage the electrolysis cell.

[0037] Meanwhile, an external heating water tank 1 is used in conjunction with a water pump to heat the water, so that the temperature of the water flowing into the electrolysis cell is relatively uniform and there will be no local high temperature.

[0038] This solution uses a heating water tank 1 to quickly heat the water (alkali solution) in the electrolytic cell, thereby rapidly meeting the working temperature requirements of the electrolytic cell and improving the speed of cold start-up.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A heating device for an electrolyzer used in the cold start of an AEM hydrogen production plant, comprising a heating water tank and an electric heater; the heating water tank is generally a rectangular shell, and the electric heater includes a junction box and a heating tube, characterized in that, The junction box is fixedly installed on the top left side of the heating water tank. The heating tube is located inside the heating water tank, and the top of the heating tube is connected to the bottom of the junction box. The heating tube includes a coil section, on which a heat-conducting plate is fixedly connected. The heat-conducting plate is fixedly installed inside the heating water tank by multiple sets of fixing brackets. The fixing brackets include a base and side frames. Several side frames are spaced along the front-back direction on the base, and the side frames are perpendicular to the base. The base is fixedly welded to the inner wall of the heating water tank, and the side frames are fixedly connected to the heat-conducting plate by bolts. A cold water inlet is provided on the top right side of the heating water tank, and a hot water outlet is provided at the lower left side of the heating water tank. A drain pipe is connected to the hot water outlet, and the drain pipe is connected to the AEM electrolytic cell.

2. The electrolyzer heating device for cold start of an AEM hydrogen production equipment according to claim 1, characterized in that, The heating tubes are provided in multiple ways, and the multiple heating tubes are evenly spaced along the front-to-back direction.

3. The electrolyzer heating device for cold start of an AEM hydrogen production equipment according to claim 2, characterized in that, There are a total of 6 heating tubes, and therefore 6 heat-conducting plates.

4. The electrolyzer heating device for cold start of an AEM hydrogen production equipment according to claim 1, characterized in that, A slot is provided on one side of the side frame, and the edge of the heat-conducting plate is inserted into the slot. At the same time, the side frame has through holes along the front-to-back direction for bolts to pass through, and the edge of the heat-conducting plate also has through holes for bolts to pass through.

5. The electrolyzer heating device for cold start of an AEM hydrogen production equipment according to claim 1, characterized in that, The cold water inlet is connected to the water pump's drain outlet via an inlet pipe, and the water pump's inlet is also connected to the AEM electrolysis cell via a pipeline.

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