A quick cold start electrolysis water hydrogen production system

Abstract

The utility model relates to electrolytic water hydrogen production technical field especially relates to a kind of quick cold start electrolytic water hydrogen production system, comprising: alkaline electrolytic cell, alkaline electrolyte is arranged in alkaline electrolytic cell, for electrolytic hydrogen production;Hydrogen separator and oxygen separator, hydrogen separator and oxygen separator are respectively communicated with alkaline electrolytic cell, for separating hydrogen and oxygen of electrolysis;Alkali liquor circulation system, one end of alkali liquor circulation system is communicated with alkaline electrolytic cell, other end is communicated with hydrogen separator and oxygen separator, for raw material alkali liquor is transported to alkaline electrolytic cell and is recycled;Electric heater, electric heater is set on alkali liquor circulation system, and the alkali liquor of circulation is heated.The utility model in the present application, by setting alkali liquor circulation system and electric heater, the rapid heating of alkaline electrolyte under low temperature environment is realized, and the system start-up time is effectively shortened.Electrolytic cell is quickly restored to working condition, and waiting time and energy consumption are reduced.

Description

Technical Field

[0001] This utility model relates to the field of water electrolysis hydrogen production technology, and in particular to a rapid cold start water electrolysis hydrogen production system. Background Technology

[0002] With the introduction of the "dual carbon" target, new energy sources are being more closely integrated into social development. Among them, hydrogen energy is an ideal clean energy source, and combining renewable energy with water electrolysis to produce hydrogen can achieve zero-emission hydrogen production. However, due to the instability of renewable energy, renewable energy power generation experiences significant fluctuations, which leads to the need for water electrolysis hydrogen production systems combined with renewable energy to face the issue of repeated start-up and shutdown.

[0003] As downtime increases, the temperature of the electrolyte gradually decreases. Hydrogen production in an electrolyzer requires the electrolyte to reach a certain temperature before it can operate and produce hydrogen. Generally, the design parameters of the electrolyzer can only be achieved when the electrolyte temperature reaches 50°C. The lower the temperature of the alkali solution, the longer the start-up time of the electrolyzer and the more energy it consumes.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] This invention provides a rapid cold-start water electrolysis hydrogen production system, thereby effectively solving the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a rapid cold-start water electrolysis hydrogen production system, comprising:

[0007] An alkaline electrolytic cell, wherein an alkaline electrolyte is provided in the alkaline electrolytic cell for the electrolytic production of hydrogen;

[0008] A hydrogen separator and an oxygen separator are respectively connected to the alkaline electrolytic cell to separate the electrolyzed hydrogen and oxygen.

[0009] An alkaline solution circulation system, one end of which is connected to the alkaline electrolytic cell and the other end of which is connected to the hydrogen separator and oxygen separator, is used to transport the raw material alkaline solution to the alkaline electrolytic cell for circulation;

[0010] An electric heater is installed on the alkali circulation system to heat the circulating alkali solution.

[0011] Furthermore, the alkali circulation system includes:

[0012] A circulation pipeline, one end of which is connected to the hydrogen separator and the oxygen separator respectively, and the other end of which is connected to the alkaline electrolytic cell; the electric heater is installed on the circulation pipeline.

[0013] A circulation pump is installed on the circulation pipeline to drive the flow of electrolyte.

[0014] Furthermore, the alkali circulation system also includes:

[0015] A filter, which is installed on the circulation pipeline, is used to filter the alkaline solution;

[0016] A flow meter is installed on the circulation pipeline and located after the filter to measure the flow rate of the filtered alkaline solution.

[0017] Furthermore, the filter is equipped with a drain valve for discharging filtered impurities.

[0018] Furthermore, the electric heater is equipped with two temperature sensors before and after the circulation pipeline, respectively. The two temperature sensors collect the temperature of the circulating alkaline solution before and after heating, which is used to control the power of the electric heater.

[0019] Furthermore, the hydrogen separator and oxygen separator are equipped with cooling water pipes for cooling the hydrogen and oxygen, thereby condensing the alkaline solution.

[0020] Furthermore, the cooling water pipeline is equipped with a temperature regulating valve and two temperature sensors. The two temperature sensors respectively collect the temperatures of the electrolyzed hydrogen and oxygen, and the temperature regulating valve adjusts the flow rate of the cooling water according to the temperature.

[0021] Furthermore, the cooling water pipeline is spirally wound around the hydrogen separator and the oxygen separator.

[0022] The beneficial effects of this invention are as follows: By setting up an alkaline solution circulation system and an electric heater, rapid heating of the alkaline electrolyte in low-temperature environments is achieved, effectively shortening the system start-up time. After being recovered in the hydrogen and oxygen separators, the alkaline solution is heated and circulated back to the electrolyzer, not only avoiding waste of the alkaline solution but also improving thermal energy utilization efficiency. This system can ensure the electrolyzer quickly returns to working status under conditions of frequent renewable energy fluctuations and frequent system start-ups and shutdowns, reducing waiting time and energy consumption, improving hydrogen production efficiency and the overall economic efficiency and stability of the system. It is particularly suitable for hydrogen production scenarios driven by fluctuating power sources such as wind and solar power. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the alkali circulation system;

[0026] Figure 3 This is a schematic diagram of the cooling water pipeline. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] like Figures 1 to 3 As shown: A rapid cold-start water electrolysis hydrogen production system, comprising:

[0029] Alkaline electrolytic cell 1, which is equipped with an alkaline electrolyte for electrolytic hydrogen production;

[0030] Hydrogen separator 2 and oxygen separator 3 are respectively connected to alkaline electrolytic cell 1 and are used to separate the electrolyzed hydrogen and oxygen.

[0031] Alkali circulation system 4, one end of which is connected to alkaline electrolytic cell 1, and the other end is connected to hydrogen separator 2 and oxygen separator 3, is used to transport raw alkali solution to alkaline electrolytic cell 1 for circulation.

[0032] Electric heater 5 is installed on the alkali circulation system 4 to heat the circulating alkali solution.

[0033] By incorporating an alkaline solution circulation system 4 and an electric heater 5, rapid heating of the alkaline electrolyte in low-temperature environments is achieved, effectively shortening system start-up time. The alkaline solution is recovered in the hydrogen separator 2 and oxygen separator 3 and then recirculated back to the electrolyzer after heating, not only avoiding waste but also improving thermal efficiency. This system can ensure the electrolyzer quickly returns to operational status under conditions of frequent renewable energy fluctuations and frequent system start-ups and shutdowns, reducing waiting time and energy consumption, and improving hydrogen production efficiency and the overall economic efficiency and stability of the system. It is particularly suitable for hydrogen production scenarios driven by fluctuating power sources such as wind and solar power.

[0034] like Figure 2 As shown in this embodiment, the alkali circulation system 4 includes:

[0035] The circulation pipeline 41 has one end connected to the hydrogen separator 2 and the oxygen separator 3 respectively, and the other end connected to the alkaline electrolysis cell 1. The electric heater 5 is installed on the circulation pipeline 41.

[0036] Circulation pump 42 is installed on circulation pipeline 41 and is used to drive the flow of electrolyte. Figure 2 The direction of the middle arrow indicates the flow direction of the circulating alkali solution.

[0037] By introducing a circulation pipeline 41 and a circulation pump 42 into the alkali circulation system 4, and in conjunction with the electric heater 5, efficient circulation and rapid heating of the alkali solution are achieved. The circulation pump 42 provides stable power, enabling the alkali solution to continuously flow between the hydrogen separator 2, oxygen separator 3, and electrolyzer, accelerating heat transfer and distribution within the system and preventing efficiency degradation caused by localized temperature differences. The electric heater 5 continuously heats the flowing alkali solution, helping the electrolyzer to quickly reach the required start-up temperature in low-temperature environments. This structure further improves the system's cold start response speed, reduces energy consumption, and enhances the system's adaptability and operational stability under intermittent renewable energy power supply conditions.

[0038] The alkali circulation system 4 also includes:

[0039] Filter 43 is installed on the circulation pipeline 41 and is used to filter the alkaline solution.

[0040] Flow meter 44 is installed on the circulation pipeline 41 and located after the filter 43 to measure the flow rate of the filtered alkaline solution.

[0041] The filter 43 improves the cleanliness of the alkali solution, which helps to extend the service life of the system components; the introduction of the flow meter 44 enables precise monitoring of the alkali solution flow status, which facilitates the optimization of system control strategies and fault early warning, thereby further improving the safety, reliability and automation level of the system.

[0042] As a preferred embodiment of the above, the filter 43 is provided with a drain valve 431 for discharging the filtered impurities.

[0043] A drain valve 431 is installed on filter 43 to periodically discharge impurities and deposits trapped during the filtration process, preventing impurities from accumulating in filter 43 and causing blockage or affecting the filtration effect. This facilitates system maintenance and cleaning, effectively extending the service life of filter 43 and ensuring the long-term stable operation of the alkali circulation system 4. Simultaneously, the drain valve 431 improves the automation level and ease of operation of the system, further enhancing the reliability and engineering adaptability of the entire hydrogen production system.

[0044] In this embodiment, two temperature sensors 6 are respectively installed before and after the circulation pipeline 41 of the electric heater 5. The two temperature sensors 6 collect the temperature of the circulating alkaline solution before and after heating, and are used to control the power of the electric heater 5.

[0045] Two temperature sensors 6 are installed before and after the circulation pipeline 41 of the electric heater 5 to collect the temperature information of the alkaline solution before and after heating, respectively. By comparing the real-time data of the two temperature sensors 6, dynamic monitoring and power regulation control of the heating effect of the electric heater 5 can be achieved.

[0046] The system can precisely adjust the power of the electric heater based on changes in the alkali solution temperature, preventing overheating or underheating, improving energy efficiency, and ensuring the electrolytic cell operates within its optimal temperature range. Simultaneously, this structure enhances the system's intelligence and temperature control accuracy, improving the safety and stability of the cold start process.

[0047] like Figure 3 As shown, cooling water pipes 7 are installed on hydrogen separator 2 and oxygen separator 3 to cool hydrogen and oxygen and condense the alkaline solution.

[0048] The hydrogen separator 2 and oxygen separator 3 are equipped with cooling water pipes 7, which are used to cool the hydrogen and oxygen produced by electrolysis, so that the alkali solution entrained in them is condensed and returned to the system, thus avoiding alkali loss and reduction of gas purity.

[0049] The cooling water pipeline 7 is equipped with a temperature regulating valve 71 and two temperature sensors 6. The two temperature sensors 6 collect the temperatures of the electrolyzed hydrogen and oxygen, respectively. The temperature regulating valve 71 adjusts the flow rate of the cooling water according to the temperature.

[0050] The cooling water pipeline 7 is equipped with a temperature regulating valve 71 and two temperature sensors 6. The two temperature sensors 6 are used to collect the temperature of hydrogen and oxygen respectively. The temperature regulating valve 71 dynamically adjusts the flow rate of cooling water according to the sensor feedback data to achieve precise temperature control.

[0051] As a preferred embodiment, the cooling water pipe 7 is spirally wound around the hydrogen separator 2 and the oxygen separator 3. This spiral winding of the cooling water pipe 7 around the hydrogen separator 2 and the oxygen separator 3 increases the cooling area and heat exchange efficiency, thereby improving the cooling effect.

[0052] Figure 3 The direction of the middle arrow indicates the direction of cooling water flow. Cooling water pipe 7 can efficiently cool hydrogen and oxygen gas and recover alkali, improving the safety, resource utilization and hydrogen purity of the system. At the same time, it has good thermal control performance and response adjustment capability, adapting to the cooling needs under different operating conditions and enhancing the stability and reliability of the overall system.

[0053] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rapid cold-start water electrolysis hydrogen production system, characterized in that, include: An alkaline electrolytic cell, wherein an alkaline electrolyte is provided in the alkaline electrolytic cell for the electrolytic production of hydrogen; A hydrogen separator and an oxygen separator are respectively connected to the alkaline electrolytic cell to separate the electrolyzed hydrogen and oxygen. An alkaline solution circulation system, one end of which is connected to the alkaline electrolytic cell and the other end of which is connected to the hydrogen separator and oxygen separator, is used to transport the raw material alkaline solution to the alkaline electrolytic cell for circulation; An electric heater is installed on the alkali circulation system to heat the circulating alkali solution; The alkali circulation system includes: A circulation pipeline, one end of which is connected to the hydrogen separator and the oxygen separator respectively, and the other end of which is connected to the alkaline electrolytic cell; the electric heater is installed on the circulation pipeline. A circulation pump, which is installed on the circulation pipeline, is used to drive the flow of electrolyte; The electric heater has two temperature sensors installed before and after the circulation pipeline. The two temperature sensors collect the temperature of the circulating alkaline solution before and after heating, respectively, for controlling the power of the electric heater. The hydrogen separator and oxygen separator are equipped with cooling water pipes for cooling hydrogen and oxygen, thereby condensing the alkaline solution.

2. The rapid cold-start water electrolysis hydrogen production system according to claim 1, characterized in that, The alkali circulation system also includes: A filter, which is installed on the circulation pipeline, is used to filter the alkaline solution; A flow meter is installed on the circulation pipeline and located after the filter to measure the flow rate of the filtered alkaline solution.

3. The rapid cold-start water electrolysis hydrogen production system according to claim 2, characterized in that, The filter is equipped with a drain valve for discharging the filtered impurities.

4. The rapid cold-start water electrolysis hydrogen production system according to claim 1, characterized in that, The cooling water pipeline is equipped with a temperature regulating valve and two temperature sensors. The two temperature sensors collect the temperatures of the electrolyzed hydrogen and oxygen, respectively. The temperature regulating valve adjusts the flow rate of the cooling water according to the temperature.

5. The rapid cold-start water electrolysis hydrogen production system according to claim 1, characterized in that, The cooling water pipeline is spirally wound around the hydrogen separator and oxygen separator.

Images