Electrolytic tank outlet gas analysis system
By setting up a gas-liquid separator and analyzing the design of a cooling tank at the outlet of the electrolytic cell, the problem of delay in determining the operating status of the electrolytic cell is solved, and low-cost and fast electrolytic cell status monitoring is achieved.
Patent Information
- Application Number
- CN202510529693.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2025-07-11
AI Technical Summary
In the prior art, in large-scale and large-scale applications of electrolytic cells, it is difficult to effectively judge the operating status of each electrolytic cell, resulting in delayed operational judgment and high cost.
A gas analysis system for the outlet of the electrolytic cell is designed, using the partition structure in the gas-liquid separator, and the electrolytic cell connection pipe is divided into two front-section separation zones and one rear-section mixing zone. By analyzing the cooling tank and gas analyzer, the operation of each electrolytic cell is judged, so as to reduce the use of alkaline pumps, and energy consumption and investment.
It realizes rapid and accurate judgment of the operating status of each electrolytic cell, reduces energy consumption and investment costs, and avoids judgment delays caused by mixture mixing.
Smart Images
Figure CN120291156A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of hydrogen production by electrolyzing water in the new energy field, and specifically to an electrolytic cell outlet gas analysis system. Background Art
[0002] Currently, with the application of large-scale hydrogen production, the enlargement of electrolytic cells has fallen behind the scale of application. The type of gas-liquid separation device configured with one electrolytic cell has large investment and floor area and cannot keep up with the project requirements. To solve this bottleneck, a set of gas-liquid separation devices is configured with two electrolytic cells, and a set of gas purity analyzers is installed at the outlet of the gas-liquid separation device. This is a new mode that meets the requirements of large-scale hydrogen production, but it also brings some problems, such as how to judge whether each electrolytic cell is operating normally or pathologically during operation. Summary of the Invention
[0003] To solve the above technical problems, the present invention provides an electrolytic cell outlet gas analysis system, which can conveniently judge the operation condition of the electrolytic cell and has low input cost.
[0004] Its technical solution is as follows: An electrolytic cell outlet gas analysis system, characterized in that it includes a gas-liquid separator, one end of the gas-liquid separator is provided with an electrolytic cell connecting pipe 1 and an electrolytic cell connecting pipe 2, two front-stage separation zones and a rear-stage mixing zone are formed in the gas-liquid separator through a partition board, the electrolytic cell connecting pipe 1 and the electrolytic cell connecting pipe 2 respectively extend into one of the front-stage separation zones, the front-stage separation zone is connected to an analysis cooling tank through an air guiding pipe, the gas outlet of the analysis cooling tank is connected to a gas analyzer, and the liquid outlet is connected to the gas-liquid separator through a reflux pipe.
[0005] It is further characterized in that the partition board includes a longitudinal partition board and a transverse partition board, the upper end and the front end of the longitudinal partition board are both connected to the inner wall of the gas-liquid separator, a gap is left between the lower end of the longitudinal partition board and the bottom of the gas-liquid separator, the rear end of the longitudinal partition board is connected to the transverse partition board, the upper end and the lower end of the transverse partition board are both connected to the inner wall of the gas-liquid separator, and gaps are left between both sides of the transverse partition board and the inner wall of the gas-liquid separator; The gas analyzer includes a hydrogen-in-oxygen analyzer and an oxygen-in-hydrogen analyzer; The analysis cooling tank is connected to a cooling desalination water pipe, and a flow meter and a control valve are arranged on the cooling desalination water pipe.
[0006] After adopting the present invention, the outlets of two electrolytic cells are sent into different front-stage separation zones in the gas-liquid separator through the electrolytic cell connecting pipes, a path of gas is led out and sent into the gas analyzer through the analysis cooling tank for purity analysis to determine the operation condition of a single electrolytic cell, and the gas-liquid mixtures in the two front-stage separation zones enter the rear-stage mixing zone for mixing, and finally the separation of the lye and the gas is realized. Brief Description of the Drawings
[0007] Figure 1 It is a schematic diagram of the system of the present invention; Figure 2 It is a top view of the internal partition of the gas-liquid separator. Detailed Embodiment
[0008] See Figure 1 and Figure 2 As shown in [relevant figures], an electrolytic cell outlet gas analysis system includes a gas-liquid separator 1. One end of the gas-liquid separator 1 is provided with an electrolytic cell connecting pipe 1 and an electrolytic cell connecting pipe 2. Inside the gas-liquid separator 1, two front-stage separation zones 4 and a rear-stage mixing zone 5 are formed by a partition. The partition includes a longitudinal partition 6 and a transverse partition 7. The upper end and the front end of the longitudinal partition 6 are connected to the inner wall of the gas-liquid separator 1. There is a gap between the lower end of the longitudinal partition 6 and the bottom of the gas-liquid separator 1, generally at the low liquid level at the bottom inside the gas-liquid separator 1. The longitudinal partition only separates the gas space. The rear end of the longitudinal partition 6 is connected to the transverse partition 7. The upper end and the lower end of the transverse partition 7 are connected to the inner wall of the gas-liquid separator 1. There are gaps between both sides of the transverse partition 7 and the inner wall of the gas-liquid separator 1, allowing caustic liquid and gas to pass through.
[0009] The electrolytic cell connecting pipe 1 and the electrolytic cell connecting pipe 2 respectively extend into a front-stage separation zone 4. The front-stage separation zone 4 is connected to an analysis cooling tank 9 through an air guiding pipe 8. The gas outlet of the analysis cooling tank 9 is connected to a hydrogen-in-oxygen analyzer 10 and an oxygen-in-hydrogen analyzer 11. The liquid outlet is connected to the gas-liquid separator 1 through a reflux pipe 12, and it can flow back automatically by gravity without being pumped in by a caustic liquid pump, reducing energy consumption and investment.
[0010] The analysis cooling tank 9 is connected to a cooling desalinated water pipe 12. A flow meter and a control valve are provided on the cooling desalinated water pipe 12. The analysis cooling tank 9 is cooled by desalinated water, and the flow rate is controllable. The desalinated water after heat exchange can enter the gas-liquid separator 1 through the reflux pipe 15 as part of the makeup water.
[0011] The caustic liquid and gas mixture sent out by the electrolytic cell enters the two front-stage separation zones 4 separated inside the gas-liquid separator 1. In this way, the caustic liquid and gas mixtures from different electrolytic cells can be not mixed first. Part of the gas is led out through the air guiding pipe 8 into the analysis cooling tank 9 for cooling to reduce the caustic content in the gas. The condensate flows back into the rear-stage mixing zone 5 of the gas-liquid separator 1. The cooled gas enters the hydrogen-in-oxygen analyzer 10 and the oxygen-in-hydrogen analyzer 11 for analysis, and thus it can be preliminarily judged whether the electrolytic cell is operating normally, avoiding the time delay caused by judging the quality of the electrolytic cell only by the analyzer at the outlet of the gas-liquid separation device.
[0012] The lye outlet 13 of the gas-liquid separator 1 discharges at the far end, as far as possible from the inlet of the electrolytic cell connecting pipe to the gas-liquid separator 1, reducing the dissolved gas in the lye, ensuring the residence time, and achieving sufficient separation. In the figure, 14 is the nitrogen purge pipe.
Claims
1. An electrolytic cell outlet gas analysis system, characterized in that, It includes a gas-liquid separator. One end of the gas-liquid separator is provided with an electrolytic cell connecting pipe 1 and an electrolytic cell connecting pipe 2. Two front-stage separation zones and a rear-stage mixing zone are formed in the gas-liquid separator through a partition plate. The electrolytic cell connecting pipe 1 and the electrolytic cell connecting pipe 2 respectively extend into one of the front-stage separation zones. The front-stage separation zone is connected to an analytical cooling tank through an air duct. The gas outlet of the analytical cooling tank is connected to a gas analyzer, and the liquid outlet is connected to the gas-liquid separator through a reflux pipe.
2. The electrolytic cell outlet gas analysis system according to claim 1, wherein The partition plate includes a longitudinal partition plate and a transverse partition plate. The upper end and the front end of the longitudinal partition plate are both connected to the inner wall of the gas-liquid separator. There is a gap between the lower end of the longitudinal partition plate and the bottom of the gas-liquid separator. The rear end of the longitudinal partition plate is connected to the transverse partition plate. The upper end and the lower end of the transverse partition plate are both connected to the inner wall of the gas-liquid separator. There are gaps between both sides of the transverse partition plate and the inner wall of the gas-liquid separator.
3. The electrolytic cell outlet gas analysis system according to claim 1, wherein The gas analyzer includes a hydrogen-in-oxygen analyzer and an oxygen-in-hydrogen analyzer.
4. An electrolytic cell outlet gas analysis system according to claim 1, characterized in that, The analytical cooling tank is connected to a cooling desalination water pipe, and a flow meter and a control valve are arranged on the cooling desalination water pipe.
Citation Information
Cited By
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