Alkaline water electrolytic bath hydrogen production system for rapidly detecting oxygen in hydrogen and hydrogen in oxygen

Abstract

The utility model relates to an alkaline water electrolytic bath hydrogen production system capable of rapidly detecting oxygen in hydrogen and hydrogen in oxygen, which comprises an electrolytic bath, an alkaline liquor cooler, an alkaline liquor circulating pump, a hydrogen separator, a hydrogen washer, an oxygen separator, an oxygen washer, a hydrogen cooler and an oxygen cooler, an oxygen side outlet of the electrolytic cell is connected with the oxygen preseparator, the oxygen-in-hydrogen analyzer is connected with a gas phase region of the hydrogen preseparator through a sampling pipeline, and the hydrogen-in-oxygen analyzer is connected with a gas phase region of the oxygen preseparator through a sampling pipeline. According to the utility model, the hydrogen sampling point of the oxygen-in-hydrogen analyzer is arranged in the gas phase region of the hydrogen preseparator, and the oxygen sampling point of the oxygen-in-hydrogen analyzer is arranged in the gas phase region of the oxygen preseparator, so that the data of the oxygen-in-hydrogen analyzer and the data of the oxygen-in-hydrogen analyzer can reflect the current actual operation data of the electrolytic cell; the hysteresis of detection data and actual operation data is reduced, and the operation safety of the electrolytic cell is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production technology through water electrolysis, specifically to an alkaline water electrolysis cell hydrogen production system for rapid detection of oxygen in hydrogen and hydrogen in oxygen. Background Technology

[0002] Existing alkaline water electrolysis hydrogen production equipment (such as...) Figure 1 Oxygen in hydrogen and hydrogen in oxygen are crucial safety indicators for electrolytic hydrogen production systems. Currently, oxygen sampling points are typically located at the hydrogen outlet of the hydrogen separator or the outlet of the hydrogen cooler, while hydrogen in oxygen sampling points are typically located at the oxygen outlet of the oxygen separator or the outlet of the oxygen cooler. Because the electrolyzer and the alkali separation system are placed separately, the pipelines from the electrolyzer's hydrogen and oxygen outlets to the hydrogen-oxygen separator are relatively long, and the gas phase volume of the hydrogen-oxygen separator is large. This results in a significant time lag between the data from the hydrogen-oxygen analyzer and the actual data on oxygen in hydrogen and hydrogen in oxygen in the electrolyzer, failing to accurately reflect the current operating status of the electrolyzer and affecting the safety of the electrolyzer system. Therefore, ensuring that the hydrogen-oxygen analyzer data reflects the actual operating data of the electrolyzer, reducing the lag between the detected data and the actual operating data, and improving the safety of electrolyzer operation has become one of the important research topics. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a rapid alkaline water electrolyzer hydrogen production system for detecting oxygen in hydrogen and hydrogen in oxygen. By setting a hydrogen pre-separator and an oxygen pre-separator at the alkaline outlet of the electrolyzer, the hydrogen sampling point of the hydrogen-oxygen analyzer is set in the gas phase zone of the hydrogen pre-separator, and the oxygen sampling point of the oxygen-hydrogen analyzer is set in the gas phase zone of the oxygen pre-separator. This ensures that the data from the hydrogen-oxygen analyzer and the oxygen-hydrogen analyzer can reflect the current actual operating data of the electrolyzer, reducing the lag between the detection data and the actual operating data, and improving the operating safety of the electrolyzer.

[0004] The purpose of this utility model is achieved as follows:

[0005] An alkaline water electrolyzer hydrogen production system for rapid detection of oxygen in hydrogen and hydrogen in oxygen includes an electrolyzer, an alkaline cooler, an alkaline circulating pump, a hydrogen separator, a hydrogen scrubber, an oxygen separator, an oxygen scrubber, a hydrogen cooler, and an oxygen cooler. The hydrogen-side outlet of the electrolyzer is connected to a hydrogen pre-separator, and the oxygen-side outlet of the electrolyzer is connected to an oxygen pre-separator. A hydrogen-oxygen analyzer is connected to the gas phase region of the hydrogen pre-separator via a sampling pipeline, and an oxygen-hydrogen analyzer is connected to the gas phase region of the oxygen pre-separator via a sampling pipeline.

[0006] Preferably, the alkaline outlet and hydrogen outlet of the hydrogen pre-separator are connected to the hydrogen separator via a first alkaline pipe and a hydrogen pipe, respectively, and the alkaline outlet and oxygen outlet of the oxygen pre-separator are connected to the oxygen separator via a second alkaline pipe and an oxygen pipe, respectively.

[0007] Preferably, when multiple electrolyzers share a single separation system, each electrolyzer is equipped with a hydrogen pre-separator and an oxygen pre-separator. The gas phase region of the hydrogen pre-separator is connected to a hydrogen-oxygen analyzer, and the gas phase region of the oxygen pre-separator is connected to an oxygen-hydrogen analyzer.

[0008] Preferably, the gas outlets of the hydrogen separator and the oxygen separator are respectively connected to the hydrogen scrubber and the oxygen scrubber, and the alkaline outlets of the hydrogen separator and the oxygen separator are also connected to the alkaline cooler. The alkaline solution in the alkaline cooler is replenished into the electrolytic cell by the alkaline circulating pump.

[0009] The beneficial effects of this utility model are:

[0010] By setting up hydrogen pre-separators and oxygen pre-separators at the alkaline outlet of the electrolyzer, the hydrogen sampling point of the hydrogen-oxygen analyzer is set in the gas phase zone of the hydrogen pre-separator, and the oxygen sampling point of the oxygen-hydrogen analyzer is set in the gas phase zone of the oxygen pre-separator. This ensures that the data from the hydrogen-oxygen analyzer and the oxygen-hydrogen analyzer can reflect the current actual operating data of the electrolyzer, reduce the lag between the detection data and the actual operating data, and improve the operating safety of the electrolyzer.

[0011] Meanwhile, the alkaline solution and hydrogen separated by the hydrogen pre-separator enter the hydrogen separator through independent pipelines, and the alkaline solution and oxygen separated by the oxygen pre-separator enter the oxygen separator through independent pipelines. This completely solves the problem of scouring and leakage caused by the two-phase flow of hydrogen and oxygen pipelines, and avoids the fluctuation of the pressure difference between the hydrogen and oxygen sides of the electrolyzer caused by the fluctuation of the resistance loss of the two-phase flow. Attached Figure Description

[0012] Figure 1 This is a diagram of the alkali circulation system of an existing alkaline water electrolyzer.

[0013] Figure 2 This is a schematic diagram of an alkaline water electrolysis cell hydrogen production system for rapid detection of oxygen in hydrogen and hydrogen in oxygen, according to the present invention.

[0014] in:

[0015] Electrolytic cell 1; Hydrogen pre-separator 2; Oxygen pre-separator 3; Alkali cooler 4; Alkali circulation pump 5; Hydrogen separator 6; Hydrogen scrubber 7; Oxygen separator 8; Oxygen scrubber 9; Hydrogen cooler 10; Oxygen cooler 11; Hydrogen-oxygen analyzer 12; Oxygen-hydrogen analyzer 13; First alkali pipeline 14; Hydrogen pipeline 15; Second alkali pipeline 16; Oxygen pipeline 17. Detailed Implementation

[0016] See Figure 2This utility model relates to a rapid detection system for hydrogen production in an alkaline water electrolyzer, comprising an electrolyzer 1, a hydrogen pre-separator 2, an oxygen pre-separator 3, an alkali cooler 4, an alkali circulation pump 5, a hydrogen separator 6, a hydrogen scrubber 7, an oxygen separator 8, an oxygen scrubber 9, a hydrogen cooler 10, an oxygen cooler 11, connecting pipes and valves between the components, a hydrogen-oxygen analyzer 12, an oxygen-hydrogen analyzer 13, and sampling pipes, etc. The hydrogen pre-separator 2 is installed at the hydrogen-side outlet of the electrolyzer 1. The hydrogen and alkali from the electrolyzer undergo gas-liquid two-phase separation in the hydrogen pre-separator 2. The separated alkali and hydrogen then pass through the pre-separator 2... An alkaline solution pipeline 14 and a hydrogen pipeline 15 enter a hydrogen separator 6. A hydrogen pre-separator 2 is connected to a hydrogen-oxygen analyzer 12 via a sampling pipeline. The hydrogen sampling point of the hydrogen-oxygen analyzer 12 is set in the gas phase zone of the hydrogen pre-separator 2. An oxygen pre-separator 3 is set at the oxygen side outlet of the electrolytic cell 1. The oxygen and alkaline solution from the electrolytic cell undergo gas-liquid two-phase separation in the oxygen pre-separator 3. The separated alkaline solution and oxygen enter an oxygen separator 8 via a second alkaline solution pipeline 16 and an oxygen pipeline 17, respectively. The oxygen pre-separator 3 is connected to an oxygen-hydrogen analyzer 13 via a sampling pipeline. The oxygen sampling point of the oxygen-hydrogen analyzer 13 is set in the gas phase zone of the oxygen pre-separator 3.

[0017] The gas outlets of hydrogen separator 6 and oxygen separator 8 are respectively connected to hydrogen scrubber 7 and oxygen scrubber 9. Hydrogen scrubber 7 and oxygen scrubber 9 are used to remove gas impurities and further improve the purity of hydrogen or oxygen. The alkaline solution outlets of hydrogen separator 6 and oxygen separator 8 are also connected to alkaline solution cooler 4. The alkaline solution in alkaline solution cooler 4 is replenished into electrolytic cell 1 through alkaline solution circulation pump 5. The alkaline solution in alkaline solution cooler 4 exchanges heat with circulating cooling water to reduce the temperature of alkaline solution.

[0018] Hydrogen scrubber 7 is connected to hydrogen cooler 10, and oxygen scrubber 9 is connected to oxygen cooler 11. Hydrogen in hydrogen cooler 10 exchanges heat with chilled water, and oxygen in oxygen cooler 11 exchanges heat with chilled water, thereby achieving cooling of hydrogen and oxygen.

[0019] The applicable power supply for the electrolytic cell 1 is one positive and one negative or one positive and two negative.

[0020] When multiple electrolyzers 1 share a single separation system, each electrolyzer 1 is equipped with a hydrogen pre-separator 2 and an oxygen pre-separator 3 at its outlet. The hydrogen pre-separator 2 is connected to the hydrogen outlet of the corresponding electrolyzer 1, and the oxygen pre-separator 3 is connected to the oxygen outlet of the corresponding electrolyzer 1. The gas phase region of the hydrogen pre-separator 2 is connected to a hydrogen-oxygen analyzer 12, and the gas phase region of the oxygen pre-separator 3 is connected to an oxygen-hydrogen analyzer 13. The hydrogen pre-separator and the hydrogen-oxygen analyzer are in one-to-one correspondence, and the oxygen pre-separator and the oxygen-hydrogen analyzer are in one-to-one correspondence.

[0021] Working principle:

[0022] An alkaline solution is poured into electrolytic cell 1. The water in the alkaline solution is electrolyzed to produce oxygen and hydrogen. The gas-liquid mixture of hydrogen and alkaline solution enters hydrogen pre-separator 2 from the hydrogen outlet of electrolytic cell 1. Hydrogen pre-separator 2 separates the alkaline solution and hydrogen into gas and liquid. The gas-liquid mixture of oxygen and alkaline solution enters oxygen pre-separator 3 from the oxygen outlet of electrolytic cell 1. Oxygen pre-separator 3 separates the alkaline solution and oxygen into gas and liquid. The hydrogen sampling point of hydrogen-oxygen analyzer 12 is set in the gas phase zone of hydrogen pre-separator 2, and the oxygen sampling point of oxygen-hydrogen analyzer 13 is set in the gas phase zone of oxygen pre-separator 3. This ensures that the data from hydrogen-oxygen analyzer 12 and oxygen-hydrogen analyzer 13 can reflect the current actual operating data of the electrolytic cell, reduce the lag between the detection data and the actual operating data, and improve the operating safety of the electrolytic cell.

[0023] Meanwhile, the alkaline solution and hydrogen separated by the hydrogen pre-separator 2 enter the hydrogen separator 6 through independent pipelines, and the alkaline solution and oxygen separated by the oxygen pre-separator 3 enter the oxygen separator 8 through independent pipelines. This completely solves the problem of scouring and leakage caused by the two-phase flow of hydrogen and oxygen pipelines, and avoids the fluctuation of the pressure difference between the hydrogen and oxygen sides of the electrolyzer caused by the fluctuation of the resistance loss of the two-phase flow.

[0024] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A hydrogen production system of an alkaline water electrolyzer for rapid detection of oxygen in hydrogen and hydrogen in oxygen, comprising an electrolyzer, an alkali solution cooler, an alkali solution circulating pump, a hydrogen separator, a hydrogen scrubber, an oxygen separator, an oxygen scrubber, a hydrogen cooler, and an oxygen cooler, characterized in that: The hydrogen side outlet of the electrolytic cell is connected with a hydrogen pre-separator, the oxygen side outlet of the electrolytic cell is connected with an oxygen pre-separator, the hydrogen-in-oxygen analyzer is connected with the gas phase area of the hydrogen pre-separator through a sampling pipeline, and the oxygen-in-hydrogen analyzer is connected with the gas phase area of the oxygen pre-separator through a sampling pipeline; When multiple electrolytic cells share one set of separation system, each electrolytic cell is provided with a hydrogen pre-separator and an oxygen pre-separator, the gas phase area of the hydrogen pre-separator is connected with the hydrogen-in-oxygen analyzer, and the gas phase area of the oxygen pre-separator is connected with the oxygen-in-hydrogen analyzer.

2. The alkaline water electrolyzer hydrogen production system for rapid detection of oxygen in hydrogen and hydrogen in oxygen according to claim 1, characterized in that: The alkali outlet and the hydrogen outlet of the hydrogen pre-separator are respectively connected with a hydrogen separator through a first alkali pipeline and a hydrogen pipeline, and the alkali outlet and the oxygen outlet of the oxygen pre-separator are respectively connected with an oxygen separator through a second alkali pipeline and an oxygen pipeline.

3. The alkaline water electrolyzer system for hydrogen production for rapid detection of oxygen in hydrogen and hydrogen in oxygen according to claim 1, characterized in that: The gas outlets of the hydrogen separator and the oxygen separator are respectively connected with a hydrogen scrubber and an oxygen scrubber, and the alkali outlets of the hydrogen separator and the oxygen separator are simultaneously connected with an alkali cooler, the alkali in the alkali cooler is supplemented into the electrolytic cell through an alkali circulating pump.

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