Mine water hydrogen production system
By using the interface pressure difference between electrolyte and high humidity gases in the ore hydrogenation system to achieve the self -circulation and efficient quality transmission of water, the problem of corrosion, blockage and purity in the process of hydrogenation of the mineral hydrogenation of the mine is solved. , Achieve high -purity hydrogen mining without additional energy consumption and economy.
Patent Information
- Application Number
- CN202421237078.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The prior art has problems such as catalyst corrosion, membrane blockage, calcium and magnesium precipitation and low hydrogen production purity in the process of hydroelectric hydrogen production in mines, and it requires expensive purification treatment, which increases costs.
By creating a high humidity environment in the mine's water cabin, the interface pressure difference between electrolyte and high humidity gas is used to absorb water and recycles to achieve the efficient transmission of electrolytes and the efficient transmission of water, and avoid additional purification process.
Achieving high -purity hydrogen to make high -purity hydrogen from ore water without additional energy consumption, reduce system construction and operating costs, and avoid problems such as calcium and magnesium precipitation to ensure the stability and efficiency of electrolytic hydrogen making.
Smart Images
Figure CN222411871U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electrochemistry, and more specifically to a mine water hydrogen production system. Background Art
[0002] At present, there are two ways to obtain hydrogen energy by electrolysis of non-pure water, including mine water. One is to directly use mine water, which has problems such as catalyst corrosion, membrane blockage, calcium and magnesium precipitation, low hydrogen production purity, and poor electrolysis effect. The second is to purify the mine water, produce pure water and use it in the electrolyzer. This method requires a purification process and the establishment of a desalination and purification plant, which greatly increases costs in terms of construction, operation, manpower, and maintenance. Therefore, it is urgent to develop an efficient, energy-free, and economical mine water hydrogen production system. Utility Model Content
[0003] The utility model aims to overcome the deficiencies of the prior art and provide a mine water hydrogen production system.
[0004] The purpose of the utility model is achieved through the following solutions:
[0005] A mine water hydrogen production system comprises: a mine water tank, a water capture device, gas, an electrolyzer, a hydrogen separator, a hydrogen purifier, an oxygen separator and a power supply module, wherein a heat exchange tube is arranged in the mine water tank; the mine water tank is used to contain mine water, and the mine water tank is provided with a gas through hole and a defoaming device, through which gas can be introduced into the contained mine water, and a high humidity environment is created in the mine water tank by the gas, and the high humidity gas passes through the defoaming device of the mine water tank to obtain gas containing only high-purity water vapor, and then enters the water capture device; an electrolyte spraying device is arranged in the water capture device, and the high-temperature electrolyte coming out of the electrolyzer enters the heat exchange tube, It is used to increase the temperature of mine water, accelerate the evaporation of mine water, remove volatiles in mine water, and accelerate the creation of a high-humidity environment. The high-humidity gas enters the water capture device; the high-humidity gas entering the water capture device from the mine water tank has a positive vapor pressure difference with the electrolyte, inducing the moisture in the gas to be absorbed by the electrolyte, and providing pure moisture for subsequent electrolytic hydrogen production; the gas that has absorbed moisture is further circulated into the mine water tank to further create a high-humidity environment, and when it enters the water capture device again, pure moisture is absorbed by the electrolyte; the electrolyte that has obtained pure moisture in the water capture device enters the electrolyzer for electrolytic hydrogen production.
[0006] Furthermore, the gas is directly derived from a stream of gas separated from oxygen / hydrogen produced by electrolysis, or an inert gas is added.
[0007] Furthermore, the electrolyte includes an electrolyte with low saturated vapor pressure, high electrical conductivity, and electrochemical stability, specifically including one or more combinations of KOH solution, K2CO3 solution, KHCO3 solution, NaOH solution, Na2CO3 solution, NaHCO3 solution, K3PO4 solution, CH3COOK solution, H2SO4 solution, HClO4, and H3PO4 solution.
[0008] Furthermore, if the electrolyte is an alkaline electrolyte, the electrolyzer is matched with an alkaline electrolyzer or an AEM electrolyzer; if the electrolyte is acidic, the electrolyzer is matched with a PEM electrolyzer; after the electrolysis reaction occurs in the electrolyzer to produce hydrogen and oxygen, the electrolyte is circulated again into the water capture device to obtain sufficient water for electrolytic hydrogen production by absorbing water molecules in the high-humidity gas.
[0009] Furthermore, by using the high-temperature gas generated by electrolysis as a circulating gas medium or utilizing a high-temperature electrolyte to heat the mine water, a stronger interfacial mass transfer dynamics is provided for subsequent electrolyte water capture.
[0010] Furthermore, it also includes an external air pump for further circulating the gas through the external air pump; if oxygen generated by electrolysis is used, and when oxygen is not needed as a product, the oxygen generated by electrolysis can be continuously used to create a high humidity environment.
[0011] Furthermore, the mine water tank and the water capture device can be integrated into an integrated module to reduce the movement path of water molecules and achieve efficient mass transfer integration of water.
[0012] Furthermore, if the electrolyte is an alkaline electrolyte, the electrolyzer is matched with an alkaline electrolyzer or an AEM electrolyzer; if the electrolyte is acidic, the electrolyzer is matched with a PEM electrolyzer; after the electrolysis reaction occurs in the electrolyzer to produce hydrogen and oxygen, the electrolyte is circulated again into the water capture device to obtain sufficient water for electrolytic hydrogen production by absorbing water molecules in the high-humidity gas.
[0013] The beneficial effects of the utility model include:
[0014] (1) The utility model has explored a new connection mechanism after creative thinking: using the interface pressure difference between high-humidity gas and electrolyte to make the water molecules in the high-humidity gas undergo phase change and liquefy and migrate to the electrolyte, replenishing the electrolyte with pure water. This mechanism of using this phase change migration to replenish water and produce hydrogen is discovered for the first time in the utility model. Specifically, the mine water is induced to produce a high-humidity gas atmosphere by gas, and the gas enters the water capture device, and the water molecules in the high-humidity gas are absorbed by the electrolyte. The mine water tank and the water capture device can also be integrated into an integrated module to achieve the above functions.
[0015] (2) In the utility model, the mine water tank is used to hold mine water, and gas is introduced into the held mine water, and a high humidity environment is created in the mine water tank by the gas. After the high humidity gas passes through the defoaming device of the mine water tank, the gas containing only high-purity water vapor is obtained, and then enters the water capture device. The high-temperature electrolyte coming out of the electrolytic cell enters the heat exchange tube, which is used to increase the temperature of the mine water, accelerate the evaporation of the mine water, remove the volatile components in the mine water, and accelerate the creation of a high humidity environment. The high humidity gas enters the water capture device; the water capture device is circulated and sprayed with an electrolyte with low saturated vapor pressure, high conductivity, and electrochemical stability. The high humidity gas entering the water capture device from the mine water tank has a positive vapor pressure difference with the electrolyte, inducing the moisture in the gas to be absorbed by the electrolyte, and providing pure moisture for subsequent electrolytic hydrogen production. The gas that has absorbed moisture is further circulated into the mine water tank, and after further creating a high humidity environment, it enters the water capture device again, and pure moisture is absorbed by the electrolyte. The electrolyte that has obtained pure water in the water capture device enters the electrolyzer for electrolysis to produce hydrogen; after the electrolysis reaction occurs in the electrolyzer to produce hydrogen and oxygen, the water in the electrolyte is consumed by the electrolysis reaction at the same time, thereby maintaining the interface pressure difference between the electrolyte and the high-humidity gas, thereby realizing self-circulation excitation drive of the system without additional energy consumption.
[0016] (3) The system of the utility model replenishes water for the electrolyte in the water capture device for use in electrolysis; at the same time, electrolysis consumes water synchronously to continuously maintain the interface pressure difference between the electrolyte and the mine water, thereby continuing to induce water to enter the electrolyte from the high humidity gas atmosphere. The realization of this process enables the system to continuously use mine water for hydrogen production.
[0017] (4) The utility model effectively avoids the influence of volatile matter, organic matter and inorganic ions in mine water on electrolytic hydrogen production in a simple manner, can realize an efficient and stable hydrogen production process, and at the same time realize the energy utilization of mine wastewater. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0019] Figure 1 This is a system structure diagram of an embodiment of the utility model;
[0020] Figure 2 The system of the embodiment of the utility model runs continuously and stably for more than 72 hours.
[0021] In the figure, 1-mine water tank; 2-water capture device; 3-gas; 4-electrolyzer; 5-hydrogen separator; 6-hydrogen purifier; 7-oxygen separator; 8-power supply module. DETAILED DESCRIPTION
[0022] All features disclosed in all embodiments in this specification, or all features implicitly disclosed, except mutually exclusive features and / or steps, can be combined and / or expanded or replaced in any manner.
[0023] The specific implementation process of the utility model is as follows:
[0024] The utility model provides a mine water hydrogen production system, comprising: a mine water tank 1, a water capture device 2, a gas 3, an electrolyzer 4, a hydrogen separator 5, a hydrogen purifier 6, an oxygen separator 7 and a power supply module 8, wherein a heat exchange pipe is arranged in the mine water tank 1.
[0025] Specifically, the mine water tank 1 is used to contain mine water, and gas 3 (such as nitrogen) is introduced into the contained mine water to create a high humidity environment in the mine water tank 1 through the gas 3. After the high humidity gas passes through the defoaming device of the mine water tank 1, the gas containing only high-purity water vapor is obtained, and then enters the water capture device 2.
[0026] The high-temperature electrolyte coming out of the electrolytic cell enters the heat exchange tube, which is used to increase the temperature of the mine water, accelerate the evaporation of the mine water, remove the volatiles in the mine water, and accelerate the creation of a high-humidity environment. The high-humidity gas enters the water capture device 2.
[0027] Electrolytes with low saturated vapor pressure, high conductivity, and electrochemical stability (such as KOH, NaOH, K2CO3, H2SO4, HClO4, etc.) are circulated and sprayed in the water capture device 2. The high-humidity gas entering the water capture device 2 from the mine water tank 1 has a positive vapor pressure difference with the electrolyte, inducing the moisture in the gas to be absorbed by the electrolyte, and providing pure water for subsequent electrolytic hydrogen production.
[0028] The gas 3 that has absorbed moisture further circulates into the mine water tank 1, and after further creating a high humidity environment, it enters the water capture device 2 again and is absorbed by the electrolyte to produce pure moisture.
[0029] The gas in the system of the embodiment of the utility model comes directly from a gas separated from the oxygen / hydrogen produced by electrolysis, or an inert gas (nitrogen, argon, etc.) is added. These gases can be further recycled through an external air pump; if oxygen produced by electrolysis is used, when oxygen is not needed as a product, the oxygen produced by electrolysis can also be continuously used to create a high humidity environment.
[0030] The electrolyte that has obtained pure water in the water capture device 2 enters the electrolyzer 4 for electrolytic hydrogen production. If the electrolyte is an alkaline electrolyte, the electrolyzer can be matched with an alkaline electrolyzer or an AEM electrolyzer; if the electrolyte is acidic, the electrolyzer can be matched with a PEM electrolyzer. After the electrolysis reaction occurs in the electrolyzer to produce hydrogen and oxygen, the electrolyte is circulated again into the water capture device to obtain sufficient water for electrolytic hydrogen production by absorbing water molecules in the high-humidity gas.
[0031] During the whole process, the mine water can also be heated by using the high-temperature gas generated by electrolysis as the circulating gas medium or by using the high-temperature electrolyte, providing stronger interfacial mass transfer power for the subsequent electrolyte water capture.
[0032] The utility model fundamentally solves the problem that the complex ion composition causes the ion exchange membrane to fail, the catalyst to be deactivated, and alkaline precipitation and toxic gases to be produced, and avoids the problem that the large-scale purification system takes up a lot of space; at the same time, it helps the future hydrogen energy conversion to be free from time and space restrictions, and provides strong technical support for the efficient hydrogen production of mine water. All process flows that integrate the above principles and devices in industrial electrolysis systems fall within the scope of protection of the utility model.
[0033] The utility model has the following advantages:
[0034] The utility model can directly utilize mine water to produce hydrogen, and the electrolysis energy consumption is equivalent to that of industrial electrolysis of pure water, without the need for additional desalination / purification energy consumption; and the electrolysis effect is consistent with the electrolysis performance of a commercial electrolytic cell.
[0035] The utility model breaks through the bottleneck of traditional mine water electrolysis hydrogen production, and does not require mine water desalination / purification process, so there is no need to build a large-scale water treatment plant, which greatly reduces the cost of construction, operation, manpower, maintenance and other aspects.
[0036] Since in the utility model, the high-humidity gas in the water capture device supplements the electrolyte with water without impurities, the bottleneck of direct hydrogen production from mine water being restricted by factors such as mining activities at different time periods has been broken through.
[0037] The utility model breaks through the problem that chlorine ions are oxidized to produce Cl2 or ClO in direct hydrogen production from mine water. - The bottleneck of corrosion and toxic substances is a green, non-toxic and environmentally friendly process system. This solution system does not contain impurity ions such as calcium ions and magnesium ions. There will be no calcium and magnesium precipitation during long-term operation, which reduces the cost of subsequent cleaning and maintenance.
[0038] The utility model device can realize hydrogen and oxygen separation when multiple groups of electrolysis units are used in series and parallel, and high-purity hydrogen and oxygen can be well collected.
[0039] The utility model can realize the internal self-circulation of electrolyte, and there is no need to additionally supplement electrolyte and pure water therein.
[0040] The utility model can realize a dynamic and continuous process of hydrogen production using mine water without time and space differences; in addition, it can realize energy conversion and stable storage of unstable renewable energy, providing technical means for the construction of future energy systems.
[0041] Case study on the technical effect of this utility model:
[0042] Coal mine water was used as the water source. The KOH electrolyte concentration was 30wt%, and the electrolytic cell was operated at 60°C for more than 72 hours without side reactions and catalyst corrosion. After the reaction, the proportion of each impurity component in the KOH electrolyte was less than 20ppm. Figure 2 shown.
[0043] It should be noted that within the scope of protection defined in the claims of the present utility model, the following embodiments can be combined and / or expanded or replaced in any logical way from the above specific implementation methods, such as disclosed technical principles, disclosed technical features or implicitly disclosed technical features.
[0044] Example 1
[0045] A mine water hydrogen production system, comprising: a mine water tank 1, a water capture device 2, a gas 3, an electrolyzer 4, a hydrogen separator 5, a hydrogen purifier 6, an oxygen separator 7, and a power supply module 8, wherein a heat exchange tube is arranged in the mine water tank 1; the mine water tank 1 is used to contain mine water, and the mine water tank 1 is provided with a gas through hole and a defoaming device, through which the gas 3 can be introduced into the contained mine water, and a high humidity environment is created in the mine water tank 1 through the gas 3, and the high humidity gas passes through the defoaming device of the mine water tank 1 to obtain a gas containing only high-purity water vapor, and then enters the water capture device 2; an electrolyte spraying device is arranged in the water capture device 2, and a high-temperature electrolyte coming out of the electrolyzer enters The heat exchange tube is used to increase the temperature of mine water, accelerate the evaporation of mine water, remove volatiles in the mine water, and accelerate the creation of a high humidity environment. The high-humidity gas enters the water capture device 2; the high-humidity gas entering the water capture device 2 from the mine water tank 1 has a positive vapor pressure difference with the electrolyte, inducing the moisture in the gas to be absorbed by the electrolyte, and providing pure moisture for subsequent electrolytic hydrogen production; the gas 3 that has absorbed moisture is further circulated into the mine water tank 1 to further create a high humidity environment, and when it enters the water capture device 2 again, pure moisture is absorbed by the electrolyte; the electrolyte that has obtained pure moisture in the water capture device 2 enters the electrolytic cell 4 for electrolytic hydrogen production.
[0046] Example 2
[0047] On the basis of Example 1, the gas 3 comes directly from a gas separated from the oxygen / hydrogen produced by electrolysis, or from an external inert gas.
[0048] Example 3
[0049] Based on Example 1, the electrolyte includes an electrolyte with low saturated vapor pressure, high electrical conductivity, and electrochemical stability, specifically including one or more combinations of KOH solution, K2CO3 solution, KHCO3 solution, NaOH solution, Na2CO3 solution, NaHCO3 solution, K3PO4 solution, CH3COOK solution, H2SO4 solution, HClO4, and H3PO4 solution.
[0050] Example 4
[0051] On the basis of Example 1, if the electrolyte is an alkaline electrolyte, the electrolyzer 4 is matched with an alkaline electrolyzer or an AEM electrolyzer; if the electrolyte is acidic, the electrolyzer 4 is matched with a PEM electrolyzer; after the electrolysis reaction occurs in the electrolyzer to produce hydrogen and oxygen, the electrolyte is circulated again into the water capture device 2 to obtain sufficient water for electrolytic hydrogen production by absorbing water molecules in the high-humidity gas.
[0052] Example 5
[0053] On the basis of Example 1, the high-temperature gas generated by electrolysis is used as the circulating gas medium or the high-temperature electrolyte is used to heat the mine water, thereby providing a stronger interfacial mass transfer power for the subsequent electrolyte water capture.
[0054] Example 6
[0055] On the basis of Example 2, an external air pump is also included to further circulate the gas 3 through the external air pump; if oxygen generated by electrolysis is used, and when oxygen is not needed as a product, the oxygen generated by electrolysis can be continuously used to create a high humidity environment.
[0056] Example 7
[0057] On the basis of Example 1, the mine water tank 1 and the water capture device 2 can be integrated into an integrated module to reduce the movement path of water molecules and realize efficient mass transfer integration of water.
[0058] Example 8
[0059] On the basis of Example 1, if the electrolyte is an alkaline electrolyte, the electrolyzer 4 is matched with an alkaline electrolyzer or an AEM electrolyzer; if the electrolyte is acidic, the electrolyzer 4 is matched with a PEM electrolyzer; after the electrolysis reaction occurs in the electrolyzer 4 to produce hydrogen and oxygen, the electrolyte is circulated again into the water capture device 2 to obtain sufficient water for electrolytic hydrogen production by absorbing water molecules in the high-humidity gas.
[0060] The specific implementation methods of the present utility model are not limited to the above-mentioned methods. The above description is only the preferred embodiment of the present utility model and the technical principles used. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments described here. It is possible for those skilled in the art to make various obvious changes, adjustments and substitutions without departing from the scope of protection of the present utility model. Therefore, although the present utility model is described in more detail through the above embodiments, the present utility model is not limited to the above embodiments, but may also include more other equivalent embodiments without departing from the principles and concepts of the present utility model, and the scope of the present utility model is determined by the scope of the attached claims.
Claims
1. A mine water hydrogen production system, characterized in that: include: A mine water tank (1), a water capture device (2), a gas (3), an electrolyzer (4), a hydrogen separator (5), a hydrogen purifier (6), an oxygen separator (7), and a power supply module (8), wherein a heat exchange pipe is arranged in the mine water tank (1); The mine water tank (1) is used to store mine water, and the mine water tank (1) is provided with a gas through hole and a defoaming device. Gas (3) can be introduced into the stored mine water through the gas through hole, and a high humidity environment is created in the mine water tank (1) through the gas (3). After the high humidity gas passes through the defoaming device of the mine water tank (1), gas containing only high-purity water vapor is obtained, and then enters the water capture device (2); the water capture device (2) is provided with an electrolyte spraying device, and the high-temperature electrolyte coming out of the electrolytic cell enters the heat exchange tube, which is used to increase the temperature of the mine water, accelerate the evaporation of the mine water, remove the volatile matter in the mine water, and accelerate A high humidity environment is created, and high humidity gas enters the water capture device (2); the high humidity gas entering the water capture device (2) from the mine water tank (1) has a positive vapor pressure difference with the electrolyte, inducing moisture in the gas to be absorbed by the electrolyte, and providing pure moisture for subsequent electrolytic hydrogen production; the gas (3) that has absorbed moisture is further circulated into the mine water tank (1) to further create a high humidity environment, and when it enters the water capture device (2) again, pure moisture is absorbed by the electrolyte; the electrolyte that has obtained pure moisture in the water capture device (2) enters the electrolytic cell (4) to be used for electrolytic hydrogen production.
2. The mine water hydrogen production system according to claim 1, characterized in that: The gas (3) may come directly from a gas separated from the oxygen / hydrogen produced by electrolysis, or from an inert gas added thereto.
3. The mine water hydrogen production system according to claim 1, characterized in that: The electrolyte includes an electrolyte with low saturated vapor pressure, high electrical conductivity, and electrochemical stability, specifically including one or more combinations of KOH solution, K2CO3 solution, KHCO3 solution, NaOH solution, Na2CO3 solution, NaHCO3 solution, K3PO4 solution, CH3COOK solution, H2SO4 solution, HClO4, and H3PO4 solution.
4. The mine water hydrogen production system according to claim 1, characterized in that: If the electrolyte is an alkaline electrolyte, the electrolyzer (4) is matched with an alkaline electrolyzer or an AEM electrolyzer; if the electrolyte is acidic, the electrolyzer (4) is matched with a PEM electrolyzer; after the electrolysis reaction occurs in the electrolyzer to produce hydrogen and oxygen, the electrolyte is circulated again into the water capture device (2) to obtain sufficient water for electrolytic hydrogen production by absorbing water molecules in the high-humidity gas.
5. The mine water hydrogen production system according to claim 1, characterized in that: By using the high-temperature gas generated by electrolysis as the circulating gas medium or utilizing high-temperature electrolytes to heat the mine water, stronger interfacial mass transfer dynamics are provided for subsequent electrolyte water capture.
6. The mine water hydrogen production system according to claim 2, characterized in that: It also includes an external air pump for further circulating the gas (3) through the external air pump; if oxygen generated by electrolysis is used, and when oxygen is not needed as a product, the oxygen generated by electrolysis can be continuously used to create a high humidity environment.
7. The mine water hydrogen production system according to claim 1, characterized in that: The mine water tank (1) and the water capture device (2) can be integrated into an integrated module, which is used to reduce the movement path of water molecules and realize efficient mass transfer integration of water.
8. The mine water hydrogen production system according to claim 1, characterized in that: If the electrolyte is an alkaline electrolyte, the electrolyzer (4) is matched with an alkaline electrolyzer or an AEM electrolyzer; if the electrolyte is acidic, the electrolyzer (4) is matched with a PEM electrolyzer; after the electrolysis reaction occurs in the electrolyzer (4) to produce hydrogen and oxygen, the electrolyte is circulated again into the water capture device (2) to obtain sufficient water for electrolytic hydrogen production by absorbing water molecules in the high-humidity gas.