Gas purity online detection device of electrolytic hydrogen production equipment

Abstract

The utility model discloses a gas purity on-line detection device of electrolytic hydrogen production equipment, which comprises a gas-liquid sampling pipe, a gas-liquid separator, a gas sampling pipe, a gas analyzer and a liquid return pipe, the gas-liquid separator comprises a tank body and a cooling jacket, an interlayer cooling cavity is formed between the cooling jacket and the tank body, and the liquid return pipe is arranged in the interlayer cooling cavity. One end of the gas-liquid sampling pipe is communicated with the electrolytic bath, the other end of the gas-liquid sampling pipe is communicated with the tank body, one end of the gas sampling pipe is communicated with the top of the tank body, the other end of the gas sampling pipe is communicated with the gas analyzer, one end of the liquid return pipe is communicated with the tank body, and the other end of the liquid return pipe is communicated with the electrolytic bath. According to the utility model, the gas production purity of a single electrolytic cell can be continuously monitored in real time, the accuracy of gas purity detection data is improved, the problems of long detection period and incapability of reflecting the gas purity change in time in the traditional detection mode are avoided, and the controllability and stability of the electrolytic hydrogen production equipment during production are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of detection equipment technology, specifically to an online detection device for the gas purity of an electrolytic hydrogen production equipment. Background Technology

[0002] Hydrogen energy is widely used in transportation, steelmaking, chemical industry, power generation, heating and other fields. Hydrogen production is the foundation of various hydrogen energy application pathways, and water electrolysis hydrogen production technology is the most important way to build an electric hydrogen energy structure and help new energy achieve large-scale conversion and utilization.

[0003] Among them, alkaline electrolysis technology is currently the most mature technology in the field of water electrolysis. Its basic principle of hydrogen production is: under the action of electric current, water is decomposed into hydrogen and oxygen through electrochemical reaction, and then hydrogen and oxygen are released at the cathode and anode of the electrolytic cell, respectively.

[0004] As the demand for and scale of hydrogen production via electrolyzers continue to expand, it is necessary to promptly detect the purity of hydrogen and oxygen produced by water electrolysis.

[0005] Currently, gas purity detection devices in water electrolysis hydrogen production systems are generally installed within the hydrogen production framework, specifically after gas-water separation on the oxygen side and before product oxygen collection. Existing gas purity detection devices have a long gas sampling process, and the measured gas purity lags behind the purity of the gas produced by the electrolyzer, making it impossible to quickly respond to changes and fluctuations in the electrolyzer.

[0006] Moreover, in large-scale water electrolysis hydrogen production projects, in order to save investment costs, multiple electrolyzers often share a single post-processing system. In this case, the purity displayed by a gas purity analyzer in the hydrogen production framework is the purity of the gas after multiple electrolyzers have shared a separation framework. When the analyzer shows that the gas purity is not up to standard, it will be impossible to determine which one or several electrolyzers are producing gas with substandard purity. Utility Model Content

[0007] To overcome the shortcomings of existing technologies, this utility model provides an online gas purity detection device for electrolytic hydrogen production equipment. This device can continuously monitor the gas purity of a single electrolytic cell in real time, improve the accuracy of gas purity detection data, and avoid the problems of long detection cycles and inability to reflect gas purity changes in a timely manner in traditional detection methods. This greatly improves the controllability and stability of electrolytic hydrogen production equipment during production.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] An online gas purity detection device for an electrolytic hydrogen production equipment includes a gas-liquid sampling tube, a gas-liquid separator, a gas sampling tube, a gas analyzer, and a liquid reflux tube. The gas-liquid separator includes a tank and a cooling jacket, with a jacketed cooling cavity formed between the cooling jacket and the tank for containing coolant. One end of the gas-liquid sampling tube is connected to the electrolytic cell, and the other end is connected to the tank. One end of the gas sampling tube is connected to the top of the tank, and the other end is connected to the gas analyzer. One end of the liquid reflux tube is connected to the tank, and the other end is connected to the electrolytic cell.

[0010] As a further improvement to the above technical solution, the cooling jacket is provided with a cooling water inlet and a cooling water outlet, the cooling water inlet is connected to a cooling water inlet pipe, and the cooling water outlet is connected to a drain pipe.

[0011] As a further improvement to the above technical solution, the cooling water inlet is located below the side of the cooling jacket, and the cooling water outlet is located above the side of the cooling jacket.

[0012] As a further improvement to the above technical solution, a spiral buffer tube is connected between the gas-liquid sampling tube and the tank body. The spiral buffer tube is disposed in the jacketed cooling cavity. The top end of the spiral buffer tube penetrates the bottom of the tank body, and the bottom end of the spiral buffer tube penetrates the bottom of the cooling jacket and is connected to the gas-liquid sampling tube.

[0013] As a further improvement to the above technical solution, the top end of the spiral buffer tube is also connected to a reversing bend, which is disposed inside the tank.

[0014] As a further improvement to the above technical solution, the reversing bend is arranged in an inverted J-shape.

[0015] As a further improvement to the above technical solution, a wire mesh demister is provided inside the tank, and the wire mesh demister is located at the top of the inner cavity of the tank.

[0016] As a further improvement to the above technical solution, a pure water replenishment pipe is connected to one side of the tank.

[0017] As a further improvement to the above technical solution, the liquid return pipe is connected to the side of the tank.

[0018] As a further improvement to the above technical solution, a liquid level switch is also provided on one side of the tank, and the height of the liquid level switch is higher than the height of the connection between the liquid return pipe and the tank.

[0019] The beneficial effects of this utility model are as follows: This utility model provides an online gas purity detection device for electrolytic hydrogen production equipment. By setting up a gas-liquid sampling pipe, a gas-liquid separator, a gas sampling pipe, and a liquid return pipe, the gas-liquid mixture flowing out of the electrolytic cell enters the tank body through the gas-liquid sampling pipe. The coolant in the jacketed cooling chamber rapidly cools the gas-liquid mixture in the tank body, separating the gas-liquid mixture into alkali solution and gas. Under the action of gravity, the separated gas rises to the top of the tank body and enters the gas analyzer through the gas sampling pipe for purity detection. The separated alkali solution collects at the bottom of the tank body and flows back to the hydrogen-alkali solution circulation pipeline of the electrolytic cell through the liquid return pipe, realizing the recovery of alkali solution. Thus, the gas purity of a single electrolytic cell can be continuously monitored in real time, improving the accuracy of gas purity detection data and avoiding the problems of long detection cycles and inability to reflect gas purity changes in a timely manner in traditional detection methods. This greatly improves the controllability and stability of electrolytic hydrogen production equipment during production. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a structural schematic diagram provided by an example of this utility model;

[0022] Figure 2 This is a cross-sectional view of the present invention.

[0023] Attached reference numerals: 1-Gas-liquid sampling pipe, 2-Gas-liquid separator, 21-Tank body, 22-Cooling jacket, 23-Jacketed cooling chamber, 24-Cooling water inlet pipe, 25-Drain pipe, 3-Gas sampling pipe, 4-Liquid reflux pipe, 5-Spiral buffer pipe, 6-Reversing bend, 7-Wire mesh demister, 8-Pure water replenishment pipe, 9-Level switch. Detailed Implementation

[0024] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0025] Reference Figure 1 and Figure 2 This utility model provides an online gas purity detection device for an electrolytic hydrogen production equipment, comprising a gas-liquid sampling tube 1, a gas-liquid separator 2, a gas sampling tube 3, a gas analyzer (not shown in the figure), and a liquid return pipe 4. The gas-liquid separator 2 includes a tank 21 and a cooling jacket 22, with a jacketed cooling cavity 23 formed between the cooling jacket 22 and the tank 21. The jacketed cooling cavity 23 is used to contain coolant. One end of the gas-liquid sampling tube 1 is connected to the electrolytic cell (not shown in the figure), and the other end of the gas-liquid sampling tube 1 is connected to the tank 21. One end of the gas sampling tube 3 is connected to the top of the tank 21, and the other end of the gas sampling tube 3 is connected to the gas analyzer. One end of the liquid return pipe 4 is connected to the tank 21, and the other end of the liquid return pipe 4 is connected to the electrolytic cell.

[0026] During operation, the gas-liquid mixture flowing out of the electrolytic cell enters the tank 21 through the gas-liquid sampling pipe 1. The coolant in the jacketed cooling chamber 23 rapidly cools the gas-liquid mixture in the tank 21, separating it into alkali solution and gas. Under the influence of gravity, the separated gas rises to the top of the tank 21 and enters the gas analyzer through the gas sampling pipe 3 for purity testing. The separated alkali solution collects at the bottom of the tank 21 and flows back to the hydrogen-alkali solution circulation pipeline of the electrolytic cell through the liquid return pipe 4, thus recovering the alkali solution. This allows for continuous real-time monitoring of the gas purity of a single electrolytic cell, improving the accuracy of gas purity detection data and avoiding the problems of long detection cycles and inability to reflect gas purity changes in a timely manner in traditional detection methods. This greatly improves the controllability and stability of the electrolytic hydrogen production equipment during production.

[0027] In some preferred embodiments, the cooling jacket 22 is provided with a cooling water inlet and a cooling water outlet. The cooling water inlet is connected to a cooling water inlet pipe 24, and the cooling water outlet is connected to a drain pipe 25. The coolant enters the jacketed cooling chamber 23 from the cooling water inlet pipe 24, and the coolant in the jacketed cooling chamber 23 is discharged from the drain pipe 25. This effectively increases the fluidity of the coolant in the jacketed cooling chamber 23, improves the cooling effect, and further accelerates gas-liquid separation, ensuring the accuracy of gas detection.

[0028] Positionally, the cooling water inlet is located below the side of the cooling jacket 22, and the cooling water outlet is located above the side of the cooling jacket 22. The cooling water flows from bottom to top. On the one hand, this can form a counter-current of cooling water, thereby extending the heat exchange time and improving cooling uniformity and efficiency. On the other hand, the water inlet at the bottom of the cooling jacket 22 can also reduce the deposition of impurities in the jacketed cooling cavity 23, avoid blockage of the jacketed cooling cavity 23 or pipelines, and reduce the frequency of equipment maintenance.

[0029] In some preferred embodiments, a spiral buffer tube 5 is connected between the gas-liquid sampling tube 1 and the tank body 21. The spiral buffer tube 5 is disposed in the jacketed cooling chamber 23. The top end of the spiral buffer tube 5 penetrates the bottom of the tank body 21, and the bottom end of the spiral buffer tube 5 penetrates the bottom of the cooling jacket 22 and is connected to the gas-liquid sampling tube 1.

[0030] It is understandable that the gas-liquid mixture enters the tank 21 through the gas-liquid sampling tube 1 and the spiral buffer tube 5 in sequence. The spiral buffer tube 5 can slow down the flow rate of the gas-liquid mixture, avoid damage to the instrument caused by the impact of the gas-liquid mixture, and improve the service life of the equipment. Moreover, the spiral buffer tube 5 is located in the jacketed cooling chamber 23. The gas-liquid mixture passing through the spiral buffer tube 5 can increase the cooling time, thereby improving the cooling efficiency.

[0031] Furthermore, the top end of the spiral buffer tube 5 is also connected to a reversing bend 6, which is installed inside the tank 21. Specifically, the reversing bend 6 is arranged in an inverted J shape. The gas-liquid mixture entering from the bottom is reversed through the reversing bend 6, so that the gas-liquid mixture flows into the tank 21 from top to bottom, thus avoiding damage to the instrument caused by the impact of the gas-liquid mixture.

[0032] In some preferred embodiments, a wire mesh demister 7 is provided inside the tank 21. The wire mesh demister 7 is located at the top of the inner cavity of the tank 21. The separated gas rises through the wire mesh demister 7 and then enters the gas sampling tube 3 at the top. The wire mesh demister 7 intercepts and separates the liquid droplets carried in the gas, thereby improving the cleanliness of the gas and further improving the detection accuracy of gas purity.

[0033] In some preferred embodiments, a pure water supply pipe 8 is connected to one side of the tank 21, which can effectively prevent the gas from carrying away moisture and causing the alkaline solution concentration to increase.

[0034] In some preferred embodiments, the liquid return pipe 4 is connected to the side of the tank 21. The cooled and separated alkali solution collects at the bottom of the tank 21. When the alkali solution in the tank 21 reaches a certain level, the alkali solution flows out from the liquid return pipe 4.

[0035] Furthermore, a liquid level switch 9 is also provided on one side of the tank 21. The height of the liquid level switch 9 is higher than the height of the connection between the liquid return pipe 4 and the tank 21. The liquid level switch 9 can monitor the liquid level in the tank 21 to prevent the liquid return pipe 4 from becoming blocked and causing the liquid level to be too high, and to prevent liquid from flowing into the gas sampling pipe 3 and damaging the gas analyzer.

[0036] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An online gas purity detection device for an electrolytic hydrogen production equipment, characterized in that, The device includes a gas-liquid sampling tube, a gas-liquid separator, a gas sampling tube, a gas analyzer, and a liquid reflux tube. The gas-liquid separator includes a tank and a cooling jacket, with a jacketed cooling cavity formed between the cooling jacket and the tank for containing coolant. One end of the gas-liquid sampling tube is connected to an electrolytic cell, and the other end is connected to the tank. One end of the gas sampling tube is connected to the top of the tank, and the other end is connected to the gas analyzer. One end of the liquid reflux tube is connected to the tank, and the other end is connected to the electrolytic cell.

2. The online gas purity detection device for an electrolytic hydrogen production equipment according to claim 1, characterized in that, The cooling jacket is provided with a cooling water inlet and a cooling water outlet. The cooling water inlet is connected to a cooling water inlet pipe, and the cooling water outlet is connected to a drain pipe.

3. The online gas purity detection device for an electrolytic hydrogen production equipment according to claim 2, characterized in that, The cooling water inlet is located below the side of the cooling jacket, and the cooling water outlet is located above the side of the cooling jacket.

4. The online gas purity detection device for an electrolytic hydrogen production equipment according to claim 1, characterized in that, A spiral buffer tube is connected between the gas-liquid sampling tube and the tank body. The spiral buffer tube is set in the jacketed cooling cavity. The top end of the spiral buffer tube penetrates the bottom of the tank body, and the bottom end of the spiral buffer tube penetrates the bottom of the cooling jacket and is connected to the gas-liquid sampling tube.

5. The online gas purity detection device for an electrolytic hydrogen production equipment according to claim 4, characterized in that, The top end of the spiral buffer tube is also connected to a reversing bend, which is located inside the tank.

6. The online gas purity detection device for an electrolytic hydrogen production equipment according to claim 5, characterized in that, The reversing bend is arranged in an inverted J-shape.

7. The online gas purity detection device for an electrolytic hydrogen production equipment according to claim 1, characterized in that, A wire mesh demister is installed inside the tank, and the wire mesh demister is located at the top of the inner cavity of the tank.

8. The online gas purity detection device for an electrolytic hydrogen production equipment according to claim 1, characterized in that, A pure water supply pipe is connected to one side of the tank.

9. The online gas purity detection device for an electrolytic hydrogen production equipment according to claim 1, characterized in that, The liquid return pipe is connected to the side of the tank.

10. The online gas purity detection device for an electrolytic hydrogen production equipment according to claim 9, characterized in that, A liquid level switch is also provided on one side of the tank, and the height of the liquid level switch is higher than the height of the connection between the liquid return pipe and the tank.

Images