阅读说明：本技术 一种电解制氢系统的压差调节装置及电解制氢系统 (Pressure difference adjusting device of electrolytic hydrogen production system and electrolytic hydrogen production system ) 是由 刘丽萍 王凡 王韬 郭海礁 王金意 任志博 王鹏杰 张畅 余智勇 徐显明 潘龙 于 2021-09-23 设计创作，主要内容包括：本申请提出一种电解制氢系统的压差调节装置及电解制氢系统,包括氧侧分离器、氢侧分离器以及连通所述氧侧分离器和所述氢侧分离器的管道,所述管道内设置有用于调节所述氧侧分离器和所述氢侧分离器两侧压差的活动件,本申请利用压差作为驱动力驱动活动件以调节氢氧两侧的压差,不需要额外的能源输出,避免了能耗和人力,消除了因氢氧两侧存在压差造成的安全隐患,具有实时调节氢氧两侧压差的特性,灵活度高,且无污染、无碳排放,为国家氢能产业的发展提供了安全保障,也为国家碳达峰碳中和的实现提供了支持。(The application provides a pressure differential adjusting device and electrolysis hydrogen manufacturing system of electrolysis hydrogen manufacturing system, including oxygen side separator, hydrogen side separator and intercommunication oxygen side separator with the pipeline of hydrogen side separator, be provided with in the pipeline and be used for adjusting oxygen side separator with the moving part of hydrogen side separator both sides pressure differential, this application utilizes pressure differential as the pressure differential of drive power drive moving part in order to adjust the oxyhydrogen both sides, does not need extra energy output, has avoided energy consumption and manpower, has eliminated because of there is the potential safety hazard that pressure differential caused in the oxyhydrogen both sides, has the characteristic of adjusting oxyhydrogen both sides pressure differential in real time, and pollution-free, carbon-free emission, provides the safety guarantee for the development of national hydrogen energy industry, also provides support for the realization that national carbon reaches peak carbon neutralization.)

1. The pressure difference adjusting device of the electrolytic hydrogen production system is characterized by comprising an oxygen side separator, a hydrogen side separator and a pipeline communicated with the oxygen side separator and the hydrogen side separator, wherein a moving part used for adjusting the pressure difference between the two sides of the oxygen side separator and the two sides of the hydrogen side separator is arranged in the pipeline.

2. The pressure differential accommodating device for an electrolytic hydrogen production system of claim 1, wherein when the movable member is a piston, the piston is movably disposed in the conduit.

3. The pressure difference regulating device of the electrolytic hydrogen production system according to claim 2, further comprising a controller, wherein a first proximity switch and a second proximity switch are respectively disposed in the pipe at both sides of the piston, and the first proximity switch and the second proximity switch are respectively electrically connected to the controller.

4. The pressure differential accommodating device for electrolytic hydrogen production system of claim 1, wherein when the movable member is a gas film, the gas film is fixedly disposed in the conduit at a position 1/3 near the oxygen-side separator.

5. The pressure difference adjusting device of the electrolytic hydrogen production system according to claim 4, wherein the gas film has at least a double-layer film structure.

6. An electrolytic hydrogen production system, comprising the pressure difference adjusting device of the electrolytic hydrogen production system according to any one of claims 1 to 5, and further comprising an electrolytic cell, wherein two ends of the electrolytic cell are respectively communicated with the hydrogen side separator and the oxygen side separator through pipelines.

7. An electrolytic hydrogen production system according to claim 6, wherein a first return line is provided between the hydrogen-side separator and the electrolytic cell, and a hydrogen-side filter and a hydrogen-side cooler are provided in this order along the flow direction of the liquid on the first return line.

8. The system for electrolytic hydrogen production according to claim 6, wherein a second return line is further provided between the oxygen-side separator and the electrolytic cell, and the second return line is provided with the oxygen-side filter and the oxygen-side cooler in this order in the liquid flow direction.

9. The electrolytic hydrogen production system of claim 7, wherein a hydrogen-side pump is further provided on the first return line between the hydrogen-side cooler and the electrolytic cell.

10. The system for electrolytic hydrogen production of claim 8, wherein an oxygen side pump is further provided on the second return line between the oxygen side cooler and the electrolytic cell.

Technical Field

The application relates to the technical field of electrolytic hydrogen production, in particular to a pressure difference adjusting device of an electrolytic hydrogen production system and the electrolytic hydrogen production system.

Background

At present, the mainstream industrial water electrolysis hydrogen production equipment is an alkaline water electrolysis cell, and under the application of direct current, water in the electrolysis cell can be decomposed into 1 part of hydrogen and 1/2 parts of oxygen at the cathode and the anode respectively. The ideal water electrolysis hydrogen production process is that the electrolytic bath is filled with alkali liquor, and the pressure of the hydrogen side and the oxygen side in the electrolytic bath should be equal. However, in the actual water electrolysis production process, the amount of hydrogen and oxygen generated due to water decomposition satisfies 2: 1, pressure difference exists between hydrogen and oxygen, and the hydrogen and the oxygen are easy to pass through the diaphragm to be mixed with each other under the driving of the pressure difference, so that the gas purity is reduced, and even serious accidents such as explosion are caused.

Disclosure of Invention

The present application is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the application aims to provide a pressure difference adjusting device of an electrolytic hydrogen production system. This application utilizes pressure differential as the pressure differential of drive power drive moving part in order to adjust the oxyhydrogen both sides, does not need extra energy output, has avoided energy consumption and manpower, has eliminated because of there is the potential safety hazard that pressure differential caused in the oxyhydrogen both sides, has the characteristic of adjusting the pressure differential in oxyhydrogen both sides in real time, and the flexibility ratio is high, and pollution-free, carbon-free emission, provides the safety guarantee for the development of national hydrogen energy industry, also provides support for the realization that national carbon reaches peak carbon neutralization.

In order to achieve the purpose, the pressure difference adjusting device of the electrolytic hydrogen production system comprises an oxygen side separator, a hydrogen side separator and a pipeline communicated with the oxygen side separator and the hydrogen side separator, wherein a moving part used for adjusting the pressure difference between the two sides of the oxygen side separator and the two sides of the hydrogen side separator is arranged in the pipeline.

Further, when the movable piece is a piston, the piston is movably arranged in the pipeline.

Furthermore, the device also comprises a controller, wherein a first proximity switch and a second proximity switch are respectively arranged on two sides of the piston in the pipeline, and the first proximity switch and the second proximity switch are respectively electrically connected with the controller.

Further, when the movable member is a gas film, the gas film is fixedly disposed in the conduit at a position 1/3 near the oxygen-side separator.

Further, the gas film is at least of a double-layer film structure.

An electrolytic hydrogen production system comprises the differential pressure adjusting device of the electrolytic hydrogen production system and an electrolytic cell, wherein two ends of the electrolytic cell are respectively communicated with the hydrogen side separator and the oxygen side separator through pipelines.

Further, a first return pipeline is further arranged between the hydrogen side separator and the electrolytic cell, and a hydrogen side filter and a hydrogen side cooler are sequentially arranged on the first return pipeline along the liquid flow direction.

Further, a second return pipeline is arranged between the oxygen-side separator and the electrolytic cell, and the oxygen-side filter and the oxygen-side cooler are sequentially arranged on the second return pipeline along the liquid flow direction.

Further, a hydrogen-side pump is arranged on the first return pipeline between the hydrogen-side cooler and the electrolytic cell.

Further, an oxygen-side pump is provided on a second return line between the oxygen-side cooler and the electrolytic cell.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a pressure differential accommodating device of an electrolytic hydrogen production system according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an electrolytic hydrogen production system according to another embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the application include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

Fig. 1 is a schematic structural diagram of a pressure difference regulating device of an electrolytic hydrogen production system according to an embodiment of the present application.

Referring to fig. 1, the pressure difference adjusting device of the electrolytic hydrogen production system comprises an oxygen side separator 1, a hydrogen side separator 2 and a pipeline 3 for communicating the oxygen side separator 1 and the hydrogen side separator 2, wherein a movable member 4 for adjusting the pressure difference between the two sides of the oxygen side separator 1 and the hydrogen side separator 2 is arranged in the pipeline 3. In this embodiment, the oxygen-side separator 1 and the hydrogen-side separator 2 are communicated through the pipeline 3, and because the oxygen-side separator 1 and the hydrogen-side separator 2 have different gas production rates, a pressure difference is generated on two sides of the movable member 4 in the pipeline 3, and the pressure is absorbed through the deformation or movement of the movable member 4, so that the pressures on two sides of the movable member are rebalanced. Specifically, the oxygen-side separator 1, the hydrogen-side separator 2, and the pipe 3 may be integrally formed, and have a good sealing property, and may rapidly react when a pressure difference is generated. The gas phase parts of the hydrogen side separator 2 and the oxygen side separator 1 are physically separated by a movable piece 4, and when pressure difference exists between the two sides of the hydrogen and oxygen, the movable piece can move or deform to the low-pressure side under the driving of the pressure difference until the pressures of the two sides of the hydrogen and oxygen are equal.

When the movable member 4 is a piston, the piston is movably disposed in the pipe 3. It will be appreciated that the piston, when mounted in the duct 3, is relatively gas tight, so that it can react rapidly to the pressure difference across the piston. When the pressure of the hydrogen side separator 2 is not equal to that of the oxygen side separator 1, the piston moves to the low-pressure side under the driving of the pressure difference, and the piston stops moving after the pressures of the two sides are equal to each other, so that the pressure difference is adjusted.

The pressure difference adjusting device of the electrolytic hydrogen production system further comprises a controller, wherein a first proximity switch and a second proximity switch are respectively arranged on two sides of the piston in the pipeline 3, and the first proximity switch and the second proximity switch are respectively electrically connected with the controller. Specifically, first proximity switch and second proximity switch set up both ends about the pipeline respectively, and when the piston removed the left end or the right-hand member of pipeline, when being about to lose the regulation effect, first proximity switch or second proximity switch sent the signal to the controller, can inform the pressure control condition in the staff electrolysis hydrogen manufacturing system, and the staff of being convenient for in time reacts, avoids the potential safety hazard. In other embodiments, the hydrogen production system further comprises a pressure relief pipeline which is respectively communicated with the oxygen side separator 1 and the hydrogen side separator 2, a valve is arranged on the pressure relief pipeline and can be opened and closed through remote control of a controller, so that when the proximity switch senses the piston, the pressure in the hydrogen production system is large and exceeds the adjusting range of the piston, and the valve is opened to lead out the pressure in the hydrogen production system.

When the movable member 4 is a gas film, the gas film is fixedly disposed at a position 1/3 near the oxygen-side separator 1 in the pipe 3. Because the gas production of oxygen side separator 1 is less than the gas production of hydrogen side separator 2, consequently the gas film sets up near oxygen side separator 1 in the pipeline, and the hydrogen of hydrogen side separator 2 output can save partly in the pipeline for this application device has pressure differential regulation ability by a wider margin. When a pressure difference is generated between the two sides of the air film, the air film is deformed and bulged towards the low-pressure side under the driving of the pressure difference, so that the pressures on the two sides are restored to be balanced again, and the structure has the advantage of ensuring air tightness compared with a piston.

The gas film is at least of a double-layer film structure. Because the air film is made of high-deformation materials, the double-layer film can ensure safety and avoid accidental rupture of the air film.

As shown in fig. 2, an electrolytic hydrogen production system comprises the pressure difference adjusting device of the electrolytic hydrogen production system, and further comprises an electrolytic cell 5, wherein two ends of the electrolytic cell 5 are respectively communicated with the hydrogen side separator 2 and the oxygen side separator 1 through pipelines. The electrolytic bath 5 is filled with an electrolyte and subjected to electrolysis, and the produced hydrogen and oxygen flow to the hydrogen-side separator 2 and the oxygen-side separator 1, respectively, to separate the oxygen and hydrogen into gas and liquid.

A first return pipeline 6 is further arranged between the hydrogen side separator 2 and the electrolytic cell 5, and a hydrogen side filter 7 and a hydrogen side cooler 8 are sequentially arranged on the first return pipeline 6 along the liquid flow direction. Through first return line 6 for the electrolyte that separates in the hydrogen side separator 2 flows back to in the electrolysis trough 5, and loops through filtration and the cooling of hydrogen side filter and hydrogen side cooler, guarantees the quality of the electrolyte of backward flow.

A second return pipeline 9 is further arranged between the oxygen side separator 1 and the electrolytic cell 5, and the oxygen side filter 10 and the oxygen side cooler 11 are sequentially arranged on the second return pipeline 9 along the liquid flow direction. Through the second return line 9, the electrolyte separated in the oxygen side separator 1 flows back to the electrolytic cell, and sequentially passes through the filtration and cooling of the oxygen side filter and the oxygen side cooler, so that the quality of the returned electrolyte is ensured.

A hydrogen-side pump 12 is provided in the first return line 6 between the hydrogen-side cooler 2 and the electrolytic cell 5. An oxygen-side pump 13 is also provided in the second return line 9 between the oxygen-side cooler 1 and the electrolytic cell 5. The efficiency of the electrolyte in the hydrogen side separator and the electrolyte in the oxygen side separator flowing back to the electrolytic cell 5 are improved through the arrangement of the hydrogen side pump and the oxygen side pump, so that the electrolyte in the electrolytic cell is sufficient, and the electrolytic efficiency is ensured.

It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.