Electrolytic water hydrogen production system high-pressure deoxidizer and hydrogen deoxidation method

Abstract

The application discloses an electrolytic water hydrogen production system high-pressure deoxidizer, which comprises a cylinder body, an inner cavity is formed at the center of the inside of the cylinder body, a gas inlet pipe is connected through the top end of the cylinder body, a booster device is arranged at the pipe opening of the gas inlet pipe, the booster device is located above the cylinder body, a gas outlet pipe, a charging port and a discharging port are respectively connected through the side wall of the cylinder body, a temperature sensor assembly and a deoxidizer detection device are arranged on the outer wall of the cylinder body, a blowdown port is connected through the bottom end of the cylinder body, and a cooling water coil is arranged on the inner wall of the cylinder body and matched with the gas outlet pipe. The application further discloses a hydrogen deoxidation method using the electrolytic water hydrogen production system high-pressure deoxidizer. The electrolytic water hydrogen production system high-pressure deoxidizer provided by the application solves the problems of low utilization rate and hidden safety hazards of the existing hydrogen deoxidizer.

Description

Technical Field

[0001] This invention belongs to the field of water electrolysis hydrogen production technology, and relates to a high-pressure deoxygenator for a water electrolysis hydrogen production system, as well as a method for hydrogen deoxygenation using the aforementioned high-pressure deoxygenator for a water electrolysis hydrogen production system. Background Technology

[0002] Hydrogen produced by water electrolysis still contains a small amount of oxygen after passing through a gas-liquid separator. To obtain hydrogen with higher purity, deoxygenation treatment is necessary. Currently, most mainstream hydrogen deoxygenators are equipped with heaters. During operation, these heaters operate at high temperatures and consume significant power, but their utilization rate is insufficient, easily leading to excessive energy consumption. Furthermore, traditional deoxygenators experience high gas temperatures and unstable system pressures during operation, posing certain safety hazards. Summary of the Invention

[0003] The first objective of this invention is to provide a high-pressure deoxygenator for a water electrolysis hydrogen production system, which solves the problems of low utilization rate and safety hazards of existing hydrogen deoxygenators. A second objective of this invention is to provide a method for hydrogen deoxygenation using the high-pressure deoxygenator of the aforementioned water electrolysis hydrogen production system.

[0004] The first technical solution adopted in this invention is a high-pressure deoxygenator for an electrolytic water hydrogen production system, comprising a cylinder, an inner cavity at the center of the cylinder, an inlet pipe that runs through the top of the cylinder, a pressurizing device at the inlet of the inlet pipe located above the cylinder, an outlet pipe, a loading port and a unloading port connected to the side wall of the cylinder, a temperature sensor assembly and a deoxygenating agent detection device on the outer wall of the cylinder, a drain port at the bottom of the cylinder, and a cooling water coil that cooperates with the outlet pipe on the inner wall of the cylinder.

[0005] The invention is further characterized by: The outer wall of the cylinder is equipped with an insulation layer.

[0006] Several legs are evenly distributed at the lower end of the cylinder.

[0007] The temperature sensor assembly includes a first temperature sensor and a second temperature sensor, both of which are mounted on the outer wall of the cylinder.

[0008] The cooling water coil is equipped with a cooling water inlet and a cooling water outlet at both ends. The cooling water inlet and the cooling water outlet penetrate the outer wall of the cylinder. All the pipes on the outer wall of the cylinder from top to bottom are: air inlet, loading port, cooling water inlet, air outlet, cooling water outlet, unloading port, and drain port.

[0009] The booster device is equipped with a pressure sensor.

[0010] The pressure sensor, the first temperature sensor, the second temperature sensor, and the deoxidizer detection device are all connected to the control system of the hydrogen purification system.

[0011] The second technical solution adopted in this invention is a method for hydrogen deoxygenation in water electrolysis hydrogen production, using the high-pressure deoxygenator of the above-mentioned water electrolysis hydrogen production system, and the specific method is as follows: Hydrogen produced by the water electrolysis hydrogen production system is introduced into the bottom of the cylinder cavity through the inlet pipe. During the gas introduction process, the pressurization device pressurizes the hydrogen, causing the hydrogen temperature to rise. Under the action of the deoxidizer in the cylinder cavity, some of the hydrogen reacts with oxygen to produce water. The water produced by the reaction is discharged through the drain port at the bottom. The remaining hydrogen is cooled and flows out through the outlet pipe. The deoxygenated hydrogen rises to the outlet pipe, and cooling water is injected into the cooling water coil through the cooling water inlet pipe. The cold water in the cooling water coil cools the deoxygenated hydrogen, and then the deoxygenated hydrogen flows out through the outlet pipe.

[0012] The beneficial effects of this invention are: (1) The high-pressure deoxygenator of the water electrolysis hydrogen production system of the present invention removes the electric heating element and uses a booster device to boost the hydrogen gas to achieve the purpose of raising the hydrogen gas temperature. Compared with the deoxygenator with electric heating element, the deoxygenator of the present invention has lower energy consumption during operation. Moreover, the booster device is located outside the air inlet pipe, which is easy to replace and maintain. Compared with the deoxygenator with electric heating element, it reduces the replacement cost and simplifies the replacement process. (2) The high-pressure deoxygenator of the water electrolysis hydrogen production system of the present invention uses a cooling water coil near the outlet to cool the deoxygenated hydrogen, eliminating the step of the hydrogen entering the cooler for separate cooling, and further simplifying the entire hydrogen purification process. (3) The high-pressure deoxygenator of the water electrolysis hydrogen production system of the present invention is equipped with a pressure sensor in the pressurization device and a temperature sensor on the cylinder, which can further monitor the pressure and temperature inside the deoxygenator, ensuring the safety of the deoxygenator. In addition, the cylinder of the device is equipped with a deoxygenating agent detection element, which is used to detect the temperature and state of the deoxygenating agent, so as to facilitate timely replacement and save manpower. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the high-pressure deaerator structure of the water electrolysis hydrogen production system of the present invention.

[0014] In the diagram, 1. cylinder, 2. air inlet pipe, 3. air outlet pipe, 4. pressurization device, 5. insulation layer, 6. deoxidizer, 7. loading port, 8. unloading port, 9. first temperature sensor, 10. second temperature sensor, 11. deoxidizer detection device, 12. cooling water coil, 13. cooling water inlet pipe, 14. cooling water outlet pipe, 15. drain port, 16. support leg. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] High-pressure deaerator in water electrolysis hydrogen production system, such as Figure 1 As shown, the device includes a cylinder 1 with an inner cavity at its center containing a deoxidizer 6. An air inlet pipe 2 is connected to the top of the cylinder 1, and a pressurizing device 4 is located at the inlet of the air inlet pipe 2 above the cylinder 1. An air outlet pipe 3, a loading port 7, and a discharge port 8 are also connected to the side wall of the cylinder 1. The deoxidizer 6 is loaded into the cylinder 1 through the loading port 7 and discharged through the discharge port 8 when not needed. A temperature sensor assembly and a deoxidizer detection device 11 are provided on the outer wall of the cylinder 1. The temperature sensor assembly includes a first temperature sensor 9 and a second temperature sensor 10, both of which are located on the outer wall of the cylinder 1. The bottom end of the cylinder 1 is connected to a drain outlet 15, through which wastewater generated during production can be discharged. The inner wall of the cylinder 1 is also provided with a cooling water coil 12 that cooperates with the air outlet pipe 3. The cooling water coil 12 has a cooling water inlet 13 and a cooling water outlet 14 at both ends, respectively. The cooling water inlet 13 and the cooling water outlet 14 pass through the outer wall of the cylinder 1.

[0017] All the pipes on the outer wall of the cylinder 1 from top to bottom are: air inlet pipe 2, loading port 7, cooling water inlet pipe 13, air outlet pipe 3, cooling water outlet pipe 14, unloading port 8, and drain port 15.

[0018] When hydrogen passes through the inlet 2, the pressurizing device 4 pressurizes the hydrogen, raising its temperature. The cylinder 1 is filled with deoxidizer 6. When the heated hydrogen passes through the cylinder 1, under the action of the deoxidizer 6, some of the hydrogen reacts with oxygen to produce water. The water produced by the reaction is discharged through the drain port 15 at the bottom. The remaining hydrogen is cooled and flows out through the outlet pipe 3. Finally, the deoxidized hydrogen flows out through the outlet pipe 3.

[0019] A heat insulation layer 5 is provided on the outer wall of the cylinder 1. When the deoxidizer is running, in order to ensure that the temperature of the internal hydrogen is within a certain range, the heat insulation layer 5 is used to insulate the cylinder 1, which can also further reduce the energy consumption of the deoxidizer.

[0020] Several legs 16 are evenly arranged at the lower end of the cylinder 1 to ensure the stability of the device.

[0021] The booster device 4 is equipped with a pressure sensor.

[0022] Furthermore, the pressure sensor, the first temperature sensor 9, the second temperature sensor 10, and the deoxidizer detection device 11 are all connected to the control system of the hydrogen purification system. The pressure and temperature inside the cylinder 1 can be adjusted through the control system of the hydrogen purification system. When the pressure or temperature exceeds the system set value or the cylinder 1 malfunctions, a rapid alarm interlock can be triggered, ensuring the safety of the deoxidizer and the hydrogen purification system. The deoxidizer detection device 11 contains a detection element for detecting the temperature of the deoxidizer. This device can also be connected to the control system of the hydrogen purification system. When the deoxidizer is running for a long time, it can detect the humidity and usage of the deoxidizer to determine whether the deoxidizer has failed. This allows staff to observe the deoxidizer in the control system and saves manpower.

[0023] It is worth noting here that the control system of the hydrogen purification system is existing technology and is a separate device that can display temperature and pressure data collected by temperature and pressure sensors, as well as the humidity and usage status of the deoxidizer, which is not shown in the accompanying drawings of this application.

[0024] This invention provides a novel high-pressure deoxidizer that is highly safe, efficient, and energy-saving. The deoxidizer is equipped with a pressurization device 4 at both the inlet and outlet ports. This device increases the hydrogen pressure at the inlet, raising the temperature of the hydrogen inside the cylinder 1. The deoxidizer 6, filled inside the cylinder 1, further removes oxygen from the hydrogen, thereby improving hydrogen purity. Additionally, the pressurization device 4 contains a pressure sensor to monitor the gas pressure inside the cylinder 1. Temperature sensors are installed at the top and bottom of the cylinder 1 to monitor the internal temperature. The cylinder 1 also includes a deoxidizer detection device to monitor the state of the deoxidizer.

[0025] Cooling water coil 12 is used near the hydrogen outlet to cool the deoxygenated hydrogen, eliminating the need for the hydrogen to re-enter the cooler, saving manpower and resources, and further simplifying the entire hydrogen purification process.

[0026] The present invention provides a method for hydrogen deoxygenation in water electrolysis hydrogen production, using the high-pressure deoxygenator of the aforementioned water electrolysis hydrogen production system. The specific method is as follows: Hydrogen produced by the water electrolysis hydrogen production system is introduced into the bottom of the cavity of the cylinder 1 through the inlet pipe 2. During the gas introduction process, the pressurization device 4 pressurizes the hydrogen, causing the hydrogen temperature to rise. Under the action of the deoxidizer 6 in the inner cavity of the cylinder 1, some of the hydrogen reacts with oxygen to produce water. The water produced by the reaction is discharged through the drain port 15 at the bottom. The remaining hydrogen is cooled and flows out through the outlet pipe 3. The deoxygenated hydrogen rises to the outlet pipe 3 and is injected into the cooling water coil 12 through the cooling water inlet pipe 13. The cold water in the cooling water coil 12 cools the deoxygenated hydrogen, and then the deoxygenated hydrogen flows out through the outlet pipe 3.

[0027] Throughout the reaction process, the pressure sensor, the first temperature sensor 9, and the second temperature sensor 10 inside the pressurization device 4 are all connected to the control system of the hydrogen purification system. When the pressure or temperature exceeds the system set value or the deoxidizer malfunctions, a rapid alarm interlock can be triggered. The deoxidizer detection device 11 detects the humidity and usage of the deoxidizer 6.

[0028] Example 1 The high-pressure deoxidizer of the water electrolysis hydrogen production system includes a cylinder 1, with an inner cavity at the center of the cylinder 1. An air inlet pipe 2 is connected through the top of the cylinder 1. A pressurizing device 4 is provided at the inlet of the air inlet pipe 2 and is located above the cylinder 1. An air outlet pipe 3, a loading port 7, and a unloading port 8 are also connected to the side wall of the cylinder 1. A temperature sensor assembly and a deoxidizer detection device 11 are provided on the outer wall of the cylinder 1. A drain port 15 is connected to the bottom of the cylinder 1. A cooling water coil 12 that cooperates with the air outlet pipe 3 is also provided on the inner wall of the cylinder 1.

[0029] Example 2 The high-pressure deoxygenator of the water electrolysis hydrogen production system includes a cylinder 1, with an inner cavity at the center of the cylinder 1. An air inlet pipe 2 is connected through the top of the cylinder 1. A pressurizing device 4 is installed on the outer sleeve of the air inlet pipe 2 and is located above the cylinder 1. An air outlet pipe 3, a loading port 7, and a unloading port 8 are also connected to the side wall of the cylinder 1. A temperature sensor assembly and a deoxygenating agent detection device 11 are installed on the outer wall of the cylinder 1. A drain port 15 is connected to the bottom of the cylinder 1. A cooling water coil 12 that cooperates with the air outlet pipe 3 is also installed on the inner wall of the cylinder 1.

[0030] The temperature sensor assembly includes a first temperature sensor 9 and a second temperature sensor 10, both of which are mounted on the outer wall of the cylinder 1.

[0031] Example 3 The high-pressure deoxidizer of the water electrolysis hydrogen production system includes a cylinder 1, with an inner cavity at the center of the cylinder 1. An air inlet pipe 2 is connected through the top of the cylinder 1. A pressurizing device 4 is provided at the inlet of the air inlet pipe 2 and is located above the cylinder 1. An air outlet pipe 3, a loading port 7, and a unloading port 8 are also connected to the side wall of the cylinder 1. A temperature sensor assembly and a deoxidizer detection device 11 are provided on the outer wall of the cylinder 1. A drain port 15 is connected to the bottom of the cylinder 1. A cooling water coil 12 that cooperates with the air outlet pipe 3 is also provided on the inner wall of the cylinder 1.

[0032] The temperature sensor assembly includes a first temperature sensor 9 and a second temperature sensor 10, both of which are mounted on the outer wall of the cylinder 1.

[0033] The cooling water coil 12 is provided with a cooling water inlet 13 and a cooling water outlet 14 at both ends. The cooling water inlet 13 and the cooling water outlet 14 pass through the outer wall of the cylinder 1. All the pipes on the outer wall of the cylinder 1 from top to bottom are: air inlet 2, loading port 7, cooling water inlet 13, air outlet 3, cooling water outlet 14, unloading port 8, and drain port 15.

[0034] Example 4 Based on the structure of Example 3, the pressurization device 4 in this example is equipped with a pressure sensor that is connected to the control system of the hydrogen purification system. The pressure inside the cylinder 1 is adjusted by the control system of the hydrogen purification system. When the pressure exceeds the system set value or the cylinder 1 malfunctions, a rapid alarm interlock can be triggered, ensuring the safety of the deoxygenator and the hydrogen purification system.

[0035] Example 5 Based on the structure of Example 4, in this example, the first temperature sensor 9, the second temperature sensor 10, and the deoxidizer detection device 11 are all connected to the control system of the hydrogen purification system. The temperature inside the cylinder 1 can be adjusted through the control system of the hydrogen purification system. When the temperature exceeds the system set value or the cylinder 1 malfunctions, a rapid alarm interlock can be triggered, ensuring the safety of the deoxidizer and the hydrogen purification system.

[0036] The deoxidizer detection device 11 contains a detection element for detecting the temperature of the deoxidizer. This device can also be connected to the control system of the hydrogen purification system. When the deoxidizer is running for a long time, it can detect the humidity and usage of the deoxidizer to determine whether the deoxidizer has failed. This allows staff to observe the deoxidizer in the control system and saves manpower.

[0037] Example 6 The present invention provides a method for hydrogen deoxygenation in water electrolysis hydrogen production, using the high-pressure deoxygenator of the aforementioned water electrolysis hydrogen production system. The specific method is as follows: Hydrogen produced by the water electrolysis hydrogen production system is introduced into the bottom of the cavity of the cylinder 1 through the inlet pipe 2. During the gas introduction process, the pressurization device 4 pressurizes the hydrogen, causing the hydrogen temperature to rise. Under the action of the deoxidizer 6 in the inner cavity of the cylinder 1, some of the hydrogen reacts with oxygen to produce water. The water produced by the reaction is discharged through the drain port 15 at the bottom. The remaining hydrogen is cooled and flows out through the outlet pipe 3. The deoxygenated hydrogen rises to the outlet pipe 3 and is injected into the cooling water coil 12 through the cooling water inlet pipe 13. The cold water in the cooling water coil 12 cools the deoxygenated hydrogen, and then the deoxygenated hydrogen flows out through the outlet pipe 3.

[0038] Throughout the reaction process, the pressure sensor, the first temperature sensor 9, and the second temperature sensor 10 inside the pressurization device 4 are all connected to the control system of the hydrogen purification system. When the pressure or temperature exceeds the system set value or the deoxidizer malfunctions, a rapid alarm interlock can be triggered. The deoxidizer detection device 11 detects the humidity and usage of the deoxidizer 6.

Claims

1. A high-pressure deaerator for a water electrolysis hydrogen production system, characterized in that, The device includes a cylinder (1), an inner cavity is provided at the center of the cylinder (1), an air inlet pipe (2) is connected through the top of the cylinder (1), a pressurizing device (4) is provided at the inlet of the air inlet pipe (2), the pressurizing device (4) is located above the cylinder (1), an air outlet pipe (3), a loading port (7) and a unloading port (8) are respectively connected to the side wall of the cylinder (1), a temperature sensor assembly and a deoxidizer detection device (11) are provided on the outer wall of the cylinder (1), a drain port (15) is connected to the bottom of the cylinder (1), and a cooling water coil (12) is provided on the inner wall of the cylinder (1) in conjunction with the air outlet pipe (3).

2. The high-pressure deaerator of the water electrolysis hydrogen production system according to claim 1, characterized in that, The outer wall of the cylinder (1) is provided with a heat insulation layer (5).

3. The high-pressure deaerator of the water electrolysis hydrogen production system according to claim 1, characterized in that, The lower end of the cylinder (1) is evenly provided with several legs (16).

4. The high-pressure deaerator of the water electrolysis hydrogen production system according to claim 1, characterized in that, The temperature sensor assembly includes a first temperature sensor (9) and a second temperature sensor (10), both of which are disposed on the outer wall of the cylinder (1).

5. The high-pressure deaerator of the water electrolysis hydrogen production system according to claim 4, characterized in that, The cooling water coil (12) is provided with a cooling water inlet (13) and a cooling water outlet (14) at both ends. The cooling water inlet (13) and the cooling water outlet (14) penetrate the outer wall of the cylinder (1). All the pipes on the outer wall of the cylinder (1) from top to bottom are: air inlet (2), loading port (7), cooling water inlet (13), air outlet (3), cooling water outlet (14), unloading port (8), and sewage outlet (15).

6. The high-pressure deaerator of the water electrolysis hydrogen production system according to claim 5, characterized in that, The booster device (4) is equipped with a pressure sensor.

7. The high-pressure deaerator of the water electrolysis hydrogen production system according to claim 6, characterized in that, The pressure sensor, the first temperature sensor (9), the second temperature sensor (10), and the deoxidizer detection device (11) are all connected to the control system of the external hydrogen purification system.

8. A method for hydrogen deoxygenation in water electrolysis for hydrogen production, characterized in that, Using the high-pressure deaerator of the water electrolysis hydrogen production system as described in any one of claims 1 to 7, the specific method is as follows: Hydrogen produced by the water electrolysis hydrogen production system is introduced into the bottom of the cavity of the cylinder (1) through the inlet pipe (2). During the gas introduction process, the pressurizing device (4) pressurizes the hydrogen, causing the hydrogen temperature to rise. Under the action of the deoxygenating agent (6) in the inner cavity of the cylinder (1), some hydrogen reacts with oxygen to produce water. The water produced by the reaction is discharged through the drain port (15) at the bottom. The remaining hydrogen is cooled and flows out through the outlet pipe (3). The deoxygenated hydrogen rises to the outlet pipe (3) and is injected into the cooling water coil (12) through the cooling water inlet pipe (13). The cold water in the cooling water coil (12) cools the deoxygenated hydrogen. Then the deoxygenated hydrogen flows out through the outlet pipe (3).

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