CN116555829A - Electrolyzed water hydrogen production system and its control method and control device - Google Patents

Abstract

The application discloses a hydrogen production system by electrolysis of water, a control method and a control device thereof, and belongs to the technical field of hydrogen production by electrolysis of water. The electrolyzed water hydrogen production system includes an electrolyzer, an oxygen treatment circuit, a hydrogen treatment circuit, a first gas supply device, and a second gas supply device. The outlet on the hydrogen side of the tank is connected, and the first gas supply device is connected with the oxygen treatment circuit for selectively supplying gas to the oxygen treatment circuit. By setting the first gas supply device and the second gas supply device, when the pressure of the oxygen treatment circuit or the hydrogen treatment circuit is low, gas is supplied to the corresponding processing circuit, so that the pressure difference between the oxygen processing circuit and the hydrogen processing circuit is controlled at In the optimal range, the pressure difference can be adjusted in a wide range, avoiding shutdown and debugging, improving production efficiency, and can shorten the start-up time by supplying gas to the oxygen treatment circuit and hydrogen treatment circuit when starting up.

Description

Electrolyzed water hydrogen production system and its control method and control device

technical field

The application belongs to the technical field of hydrogen production by electrolysis of water, and in particular relates to a hydrogen production system by electrolysis of water and its control method and control device.

Background technique

When the pure water electrolyzer is working, the diaphragm in the electrolyzer has a limited pressure bearing capacity. Therefore, during the operation of the device, the pressure difference between the hydrogen and oxygen in the subsequent gas-liquid separation part needs to be less than the limit pressure value of the diaphragm. Once the hydrogen and oxygen If the pressure difference on both sides is too large, it must be adjusted in time to make the pressure on both sides tend to be consistent, so as to avoid damage to the diaphragm. Generally, the pressure on both sides is adjusted through the regulating valve, but the adjustment speed is slow and there is a risk of out of control. To reduce the risk of out of control, it can only be shut down for debugging, which affects production efficiency and has room for improvement.

Contents of the invention

This application aims to solve at least one of the technical problems existing in the prior art. For this reason, this application proposes a hydrogen production system by electrolysis of water and its control method and control device, which increases the adjustable range of pressure difference of the hydrogen production system by electrolysis of water, improves the production efficiency of hydrogen production, and shortens the start-up time.

In the first aspect, the present application provides a hydrogen production system by electrolysis of water, including:

electrolyzer;

An oxygen treatment circuit, the inlet of the oxygen treatment circuit is connected with the oxygen side outlet of the electrolytic cell;

A hydrogen treatment path, the inlet of the hydrogen treatment path is connected to the hydrogen side outlet of the electrolyzer;

A first gas supply device, the first gas supply device is connected to the oxygen treatment circuit, and is used to selectively supply gas to the oxygen treatment circuit;

A second gas supply device, the second gas supply device is connected to the hydrogen processing circuit, and is used for selectively supplementing hydrogen to the hydrogen processing circuit.

According to the electrolyzed water hydrogen production system of the present application, by setting the first gas supply device and the second gas supply device, when the pressure of the oxygen treatment path or the hydrogen gas treatment path is low, the corresponding processing supplementary gas, increase the pressure of the oxygen processing circuit or the hydrogen processing circuit, so that the pressure difference between the oxygen processing circuit and the hydrogen processing circuit can be controlled within the optimal range, and the pressure difference can be adjusted in a large range to avoid Shut down for debugging, improve production efficiency, and can shorten the start-up time by supplying gas to the oxygen treatment circuit and/or the hydrogen treatment circuit when starting up.

According to an embodiment of the present application, the electrolyzed water hydrogen production system further includes:

A pressure difference detection device, the pressure difference detection device is connected between the oxygen separator of the oxygen treatment circuit and the hydrogen gas separator of the hydrogen treatment circuit, the first gas supply device is electrically connected to the pressure difference detection device connected, the first gas supply device is used to work based on the signal of the differential pressure detection device.

According to an embodiment of the present application, the differential pressure detection device is a differential pressure gauge.

According to an embodiment of the present application, the oxygen separator is connected to the bottom of the hydrogen separator, and the differential pressure detection device is a differential pressure liquid level gauge.

According to an embodiment of the present application, the first air supply device includes:

first air supply pipe;

A first gas supply device, the gas supply port of the first gas supply device is connected to the oxygen treatment circuit through the first gas supply pipe;

A first air supply valve, the first air supply valve is arranged on the first air supply pipe.

According to an embodiment of the present application, the first gas supply device is connected to the top of the oxygen separator of the oxygen treatment circuit.

According to an embodiment of the present application, the first gas supply device is used to supply inert gas to the oxygen treatment circuit.

According to an embodiment of the present application, the first gas supply device is used to supplement oxygen to the oxygen treatment circuit.

According to an embodiment of the present application, a flow meter is provided on the connecting pipeline between the first gas supply device and the oxygen treatment circuit and the connecting pipeline between the second gas supply device and the hydrogen treatment circuit.

In the second aspect, the present application provides a control method for the hydrogen production system by electrolyzing water as described in any one of the above, including:

Acquiring pressure difference information between the hydrogen processing circuit and the oxygen processing circuit;

The first air supply device and the second air supply device are controlled based on the pressure difference information.

By obtaining the pressure difference information of the hydrogen processing path and the oxygen processing path, the pressure difference state on both sides of the hydrogen and oxygen is judged, and when the pressure difference of the oxygen processing path is low and the pressure difference is large, control the first supplementary The gas device supplies gas to the oxygen processing circuit to increase the pressure of the oxygen processing circuit, so that the pressure difference between the oxygen processing circuit and the hydrogen processing circuit can be controlled within the optimal range, and the pressure difference can be adjusted in a large range to avoid shutdown debugging and improve production efficiency, and can shorten the start-up time by supplying air to the oxygen treatment circuit when starting up.

According to an embodiment of the present application, the controlling the first air supply device and the second air supply device based on the pressure difference information includes:

When the electrolyzed water hydrogen production system is in operation, and the pressure difference between the hydrogen treatment circuit and the oxygen treatment circuit is greater than the first target value, control the first gas supply device to Qi;

When the electrolyzed water hydrogen production system is in operation, and the pressure difference between the hydrogen treatment circuit and the oxygen treatment circuit is less than the second target value, control the second gas supply device to supply the hydrogen to the hydrogen treatment circuit Qi.

According to an embodiment of the present application, the controlling the first air supply device and the second air supply device based on the pressure difference information includes:

When the electrolyzed water hydrogen production system is in the start-up phase, control the first gas supply device to supply gas to the oxygen treatment circuit and control the second gas supply device to supply gas to the hydrogen treatment circuit according to the target ratio gas.

In a third aspect, the present application provides a control device for the hydrogen production system by electrolysis of water as described in any one of the above, including:

A first acquisition module, configured to acquire pressure difference information between the hydrogen processing circuit and the oxygen processing circuit;

A first control module, configured to control the first air supply device based on the pressure difference information.

According to the control device of the electrolyzed water hydrogen production system of the present application, the pressure difference information of the hydrogen processing circuit and the oxygen processing circuit is obtained through the first acquisition module, and the pressure difference information is obtained based on the pressure difference information through the first control module Control the first gas supply device, when the pressure of the oxygen treatment circuit is relatively low resulting in a large pressure difference, control the first gas supply device to supply gas to the oxygen treatment circuit, and increase the pressure of the oxygen treatment circuit, so that The pressure difference between the oxygen treatment circuit and the hydrogen treatment circuit is controlled within the optimal range, and the pressure difference can be adjusted in a large range, which avoids shutdown and debugging, improves production efficiency, and can shorten the start-up time by supplying gas to the oxygen treatment circuit when starting up .

In a fourth aspect, the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the computer program, the following The control method of the electrolyzed water hydrogen production system described in the second aspect above.

In the fifth aspect, the present application provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the system for producing hydrogen by electrolysis of water as described in the second aspect above is realized. Control Method.

In a sixth aspect, the present application provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions, to implement the second aspect The control method of the water electrolysis hydrogen production system.

In a seventh aspect, the present application provides a computer program product, including a computer program. When the computer program is executed by a processor, the method for controlling the hydrogen production system by electrolysis of water as described in the second aspect above is implemented.

The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

According to the electronic equipment, non-transitory computer-readable storage medium, chip and computer program product of the present application, by setting the first gas supply device and the second gas supply device, the oxygen processing circuit or the hydrogen When the pressure of the processing path is low, add gas to the corresponding processing path, increase the pressure of the oxygen processing path or the hydrogen processing path, so that the pressure difference between the oxygen processing path and the hydrogen processing path can be controlled at the minimum. Within the optimal range, the pressure difference can be adjusted in a large range, avoiding downtime and debugging, improving production efficiency, and can shorten the start-up time by supplying gas to the oxygen treatment circuit and/or the hydrogen treatment circuit when starting up.

Additional aspects and advantages of the 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 application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is one of the structural representations of the hydrogen production system by electrolysis of water provided by the embodiment of the present application;

Fig. 2 is the second structural schematic diagram of the electrolyzed water hydrogen production system provided by the embodiment of the present application;

Fig. 3 is a schematic flow chart of the control method of the electrolyzed water hydrogen production system provided by the embodiment of the present application;

Fig. 4 is a schematic structural view of the control device of the electrolyzed water hydrogen production system provided by the embodiment of the present application;

FIG. 5 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Reference signs:

Electrolyzed water hydrogen production system 100, electrolyzer 101;

Oxygen treatment circuit 110, first oxygen separator 111a, second oxygen separator 111b, oxygen exhaust valve 112, oxygen treatment pipeline 113, oxygen pressure gauge 114;

Hydrogen processing circuit 120, first hydrogen separator 121a, second hydrogen separator 121b, hydrogen exhaust valve 122, hydrogen processing pipeline 123;

The first air supply device 130, the first air supply equipment 131, the first air supply pipe 132, the first air supply valve 133, and the first flow meter 134;

The second air supply device 140, the second air supply equipment 141, the second air supply pipe 142, the second air supply valve 143, and the second flow meter 144;

Pressure difference detection device 150;

The first acquisition module 201, the first control module 202;

An electronic device 400 , a processor 401 , and a memory 402 .

Detailed ways

Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, are only for explaining the present application, and should not be construed as limiting the present application.

A hydrogen production system 100 by electrolysis of water according to an embodiment of the present application will be described below with reference to FIGS. 1-2 .

As shown in Figures 1 and 2, in this embodiment, the water electrolysis hydrogen production system 100 includes an electrolytic cell 101, an oxygen treatment circuit 110 and a hydrogen processing circuit 120, the inlet of the oxygen treatment circuit 110 and the oxygen side outlet of the electrolytic cell 101 The inlet of the hydrogen treatment circuit 120 is connected with the outlet of the hydrogen side of the electrolytic cell 101 .

In this embodiment, the electrolytic cell 101 may be an alkaline electrolytic cell 101 or a proton exchange membrane (PEM) electrolytic cell 101 .

The oxygen treatment circuit 110 is connected with the oxygen side outlet of the electrolytic cell 101, and is used to separate the oxygen-steam-water mixed fluid discharged from the electrolytic cell 101, cool and filter it, and finally discharge and collect it. The oxygen processing circuit 110 includes at least one oxygen separator, and The oxygen treatment pipeline 113 connected between each oxygen separator and the oxygen side outlet of the electrolytic cell 101, the gas outlet of the oxygen separator at the end is provided with an oxygen exhaust valve 112 for controlling the discharge of oxygen.

The hydrogen treatment circuit 120 is connected to the hydrogen side outlet of the electrolytic cell 101, and is used to separate the hydrogen gas-water mixed fluid discharged from the electrolytic cell 101, cool and filter it, and finally discharge and collect it. The hydrogen processing circuit 120 includes at least one hydrogen separator, and a hydrogen processing pipeline 123 connected between each hydrogen separator and the hydrogen side outlet of the electrolytic cell 101, and the gas outlet of the hydrogen separator at the end is provided with a hydrogen exhaust Valve 122 is used to control the discharge of hydrogen.

It can be understood that one or more oxygen separators and hydrogen separators can be provided respectively, and multiple separators can play a role in improving the filtering treatment effect, which is beneficial to produce oxygen or hydrogen meeting the standard.

In this embodiment, the oxygen treatment circuit 110 includes two oxygen separators, the two oxygen separators are respectively a first oxygen separator 111a close to the electrolytic cell 101 and a second oxygen separator 111b close to the oxygen exhaust valve 112, The hydrogen gas processing circuit 120 includes two hydrogen gas separators, the two hydrogen gas separators are respectively a first hydrogen gas separator 121 a close to the electrolytic cell 101 and a second hydrogen gas separator 121 b close to the hydrogen exhaust valve 122 .

In this embodiment, the water electrolysis hydrogen production system 100 further includes a first gas supply device 130 , and the first gas supply device 130 is connected to the oxygen treatment circuit 110 for selectively supplying gas to the oxygen treatment circuit 110 .

The first gas supply device 130 is connected with the oxygen treatment pipeline 113 or the oxygen separator in the oxygen treatment circuit 110, so that when supplying gas to the oxygen treatment circuit 110, the gas can be supplemented into the oxygen separator due to the communication of the pipeline , to balance with the pressure of the hydrogen processing circuit 120 .

During the process of producing oxygen and hydrogen in the electrolytic cell 101, every 1 mol of water electrolyzed produces 1 mol of hydrogen and 0.5 mol of oxygen, so the pressure in the oxygen treatment circuit 110 will be relatively low when the electrolytic cell 101 is working.

When the hydrogen production system of the electrolyzer 101 is in the running stage, if the air pressure of the oxygen treatment path 110 is too low and the pressure difference is too large, the oxygen treatment path 110 is supplied with gas by setting the first gas supply device 130 to improve the oxygen treatment path 110 side. pressure to reduce the pressure difference between the oxygen treatment circuit 110 and the hydrogen treatment circuit 120, this measure can set the system pressure difference value closer to the pressure bearing capacity of the proton exchange membrane or diaphragm, and the pressure difference can be adjusted The range is large, so that the system will not be frequently shut down for debugging.

When the electrolyzed water hydrogen production system 100 is in the start-up phase, since more hydrogen is produced, the pressure of the oxygen processing circuit 110 can be quickly increased by supplying gas to the oxygen processing circuit 110 to balance the pressure of the hydrogen processing circuit 120 , that is, the hydrogen processing circuit 120 does not need to vent gas to match the pressure of the oxygen processing circuit 110 to reduce the pressure, which speeds up the start-up speed and at least cuts the start-up time by half.

In this embodiment, the electrolyzed water hydrogen production system 100 further includes a second gas supply device 140 connected to the hydrogen processing circuit 120 for selectively replenishing hydrogen to the hydrogen processing circuit 120 .

When the electrolyzed water hydrogen production system 100 is in operation, there is a delay in the control of the hydrogen gas discharge valve, resulting in excessive hydrogen gas discharge, which lowers the pressure of the hydrogen gas processing circuit 120 and causes the pressure difference to exceed the optimal range.

In this embodiment, according to the pressure difference information of the hydrogen processing circuit 120 and the oxygen processing circuit 110, the first gas supply device 130 or the second gas supply device 140 is selected and controlled to work. When the pressure of the oxygen processing circuit 110 is low, Gas can be supplied to the oxygen processing circuit 110 through the first gas supply device 130. When the pressure of the hydrogen processing circuit 120 is low, hydrogen can be supplemented to the hydrogen processing circuit 120 by setting the second gas supply device 140, so that both sides of the hydrogen and oxygen The pressure tends to be the same, further improving the stability of the system.

Moreover, when the electrolytic water hydrogen production system 100 is started, the first gas supply device 130 and the second gas supply device 140 can be used to simultaneously supply gas to the oxygen processing circuit 110 and the hydrogen processing circuit 120 respectively, so as to increase the pressure rise on both sides of hydrogen and oxygen. High speed, on the basis of shortening the start-up time to half of the original in the above embodiment, the start-up time is further shortened.

According to the electrolyzed water hydrogen production system 100 of the present application, by setting the first gas supply device 130 and the second gas supply device 140, when the pressure of the oxygen processing circuit 110 or the hydrogen processing circuit 120 is low, gas is supplied to the corresponding processing circuit , increase the pressure of the oxygen processing circuit 110 or the hydrogen processing circuit 120, so that the pressure difference between the oxygen processing circuit 110 and the hydrogen processing circuit 120 is controlled within the optimal range, the pressure difference can be adjusted in a large range, avoiding shutdown and debugging, and improving production efficiency, In addition, the start-up time can be shortened by supplying gas to the oxygen processing circuit 110 and/or the hydrogen processing circuit 120 when starting up.

In some embodiments, the water electrolysis hydrogen production system 100 may also include an oxygen pressure gauge 114 and a hydrogen pressure gauge, the oxygen pressure gauge 114 and the hydrogen pressure gauge are respectively connected to the first oxygen separator 111a and the first hydrogen separator 121a, respectively It is used to detect the pressure of the first oxygen separator 111a and the first hydrogen separator 121a, and then judge the pressure difference between them.

In this embodiment, the oxygen pressure gauge 114 is electrically connected to the oxygen exhaust valve 112, and the operation of the oxygen exhaust valve 112 is controlled by the signal of the oxygen pressure gauge 114 to control the pressure of the oxygen processing circuit 110. The hydrogen pressure gauge is connected to the hydrogen exhaust valve. The gas valve 122 is electrically connected, and the hydrogen exhaust valve 122 is controlled by the signal of the hydrogen pressure gauge to control the pressure of the hydrogen processing circuit 120 .

In this embodiment, the valve opening of the hydrogen exhaust valve 122 can also be controlled. When the pressure of the hydrogen processing circuit 120 is too high and the pressure difference is too large, the valve opening of the hydrogen exhaust valve 122 can be increased. In order to accelerate the discharge of hydrogen, thereby reducing the pressure difference.

As shown in FIG. 1 , in some embodiments, the water electrolysis hydrogen production system 100 can also include a differential pressure detection device 150, which is connected to the first oxygen separator 111a in the oxygen processing circuit 110 and the hydrogen processing circuit 120 Between the first hydrogen separator 121a, the first gas supply device 130 is electrically connected to the pressure difference detection device 150 , and the first gas supply device 130 is used to work based on the signal of the pressure difference detection device 150 .

In this embodiment, by setting the differential pressure detection device 150 between the first oxygen separator 111a and the first hydrogen separator 121a, the detection signal of the differential pressure detection device 150 can directly determine the difference between the first oxygen separator 111a and the first hydrogen separator 121a. The pressure difference between a hydrogen separator 121a, when the signal shows that the pressure difference is in the controllable range, the electrolyzed water hydrogen production system 100 works normally; The processing circuit 110 supplies air to increase the pressure of the first oxygen separator 111a until the differential pressure signal of the differential pressure detection device 150 returns to the controllable range.

In this embodiment, the differential pressure detection device 150 can also be electrically connected to the hydrogen exhaust valve 122 to control the operation of the hydrogen exhaust valve 122. By controlling the valve opening of the hydrogen exhaust valve 122, the exhaust gas on the hydrogen side can be controlled. The gas volume, and then adjust the pressure of the hydrogen processing circuit 110, so as to reduce the pressure difference between hydrogen and oxygen.

As shown in FIG. 1 , in some embodiments, the differential pressure detection device 150 may be a differential pressure gauge.

In this embodiment, the two ends of the differential pressure gauge are respectively connected to the gas phase parts of the first oxygen separator 111a and the first hydrogen separator 121a, for detecting the air pressure of the first oxygen separator 111a and the first hydrogen separator 121a difference, and guide the first air supply device 130 to work according to the difference in air pressure.

As shown in FIG. 2, in some embodiments, the first oxygen separator 111a is connected to the bottom of the first hydrogen separator 121a.

The first oxygen separator 111a and the first hydrogen separator 121a are connected from the bottom through a connecting pipe to balance the pressure on both sides of the first oxygen separator 111a and the first hydrogen separator 121a.

In this embodiment, the differential pressure detection device 150 may also be a differential pressure liquid level gauge.

The liquid level of the first hydrogen separator 121a and the first oxygen separator 111a is detected by a differential pressure level gauge, and the pressure difference between the first hydrogen separator 121a and the first oxygen separator 111a is judged according to the liquid level difference, and then controlled The pressure on both sides of the hydrogen and oxygen in the electrolytic cell 101 will not deviate too much.

When the pressure on the oxygen side is low, the liquid level of the first oxygen separator 111a will be too high, and the liquid level on both sides will be restored to balance by supplying gas to the first oxygen separator 111a. When the pressure on the hydrogen side is low, the liquid level will be too high. As a result, the liquid level of the first hydrogen separator 121a is too high. By supplying gas to the first hydrogen separator 121a to restore the balance of the liquid levels on both sides, the purpose of non-stop adjustment can be achieved, and the first oxygen separator 111a and the first oxygen separator 111a can be avoided. Gas blow-by between the hydrogen separators 121a affects the production purity.

As shown in FIG. 1 to FIG. 2 , in some embodiments, the first air supply device 130 may include a first air supply pipe 132 , a first air supply device 131 and a first air supply valve 133 .

The first gas supply device 131 can be a gas production device or a gas storage device. The gas supply port of the first gas supply device 131 is used to output gas, and the gas supply port of the first gas supply device 131 is connected to the oxygen processing circuit 110 connected, the first air supply valve 133 is arranged on the first air supply pipe 132 .

In this embodiment, the first air supply valve 133 is used to control the opening and closing of the first air supply pipe 132 , and when the pressure of the oxygen treatment circuit 110 is low, the first air supply valve 133 is opened to supply air to the oxygen treatment circuit 110 .

It can be understood that the air supplement rate can be controlled by controlling the opening and closing degree of the first air supplement valve 133 .

In an example, the first supplementary air valve 133 can be switched manually.

In another example, the first supplementary gas valve 133 can also be electrically connected to the pressure gauges of the first oxygen separator 111a and the pressure gauges of the first hydrogen separator 121a respectively, and is used to control the action according to the signals of the two pressure gauges.

In yet another example, the first supplementary air valve 133 may also be electrically connected to the differential pressure detection device 150 , and directly guide the work through the differential pressure signal of the differential pressure detection device 150 .

As shown in FIGS. 1 to 4 , in some embodiments, the first gas supply device 130 may be connected to the top of the oxygen separator of the oxygen treatment circuit 110 .

By connecting the first gas supply device 130 to the top of the first oxygen separator 111a, the gas supplemented by the first gas supply device 130 is directly supplemented to the gas phase part of the first oxygen separator 111a, and the pressure rises quickly and the control is accurate.

It can be understood that the first gas supply device 130 can be connected with any equipment or pipeline of the entire oxygen treatment circuit 110 .

In another embodiment, the first gas supply device 130 may also be connected to the oxygen treatment pipeline 113 of the oxygen treatment circuit 110 , and the gas may also enter the first oxygen separator 111 a through the communication of the pipeline.

Or, when there are multiple oxygen separators, the first air supply device 130 can also be connected with any oxygen separator, such as the second oxygen separator 111b, or before the oxygen exhaust valve 112 of the second oxygen separator 111b. All of the pipeline connections can be connected to the first oxygen separator 111a closest to the electrolytic cell 101 .

Based on the foregoing embodiments, the following describes the embodiments of the present application in detail from two different implementation angles.

1. The first gas supply device 130 is used to supplement inert gas.

In some embodiments, the first gas supply device 130 can be used to supply inert gas to the oxygen treatment circuit 110 .

In this embodiment, the first gas supply device 131 of the first gas supply device 130 can be an inert gas production device or an inert gas storage device, and the pressure of the oxygen processing circuit 110 can be increased by supplementing the inert gas, and no interaction with oxygen will occur. reaction, high security.

It can be understood that this embodiment is applicable to the case where the oxygen discharged from the oxygen treatment circuit 110 does not need to be collected.

2. The first air supply device 130 is used to supplement oxygen.

In some embodiments, the first gas supply device 130 is used to supplement oxygen to the oxygen treatment circuit 110 .

In this embodiment, the first gas supply device 131 of the first gas supply device 130 can be an oxygen production device or an oxygen storage device, and the pressure of the oxygen treatment circuit 110 can be increased by supplementing oxygen, and the discharged oxygen can also be recovered.

When the first gas supply device 131 is an oxygen storage device, the oxygen storage device can be connected to the oxygen exhaust valve 112 of the second oxygen separator 111b, and the oxygen discharged through the second oxygen separator 111b is recovered by the oxygen storage device. When the pressure in the processing path 110 is low, the stored oxygen can also be supplemented to the oxygen processing path 110 to achieve recycling.

In some embodiments, the second air supply device 140 may include a second air supply pipe 142 , a second air supply device 141 and a second air supply valve 143 .

The second gas supply device 141 can be a gas production device or a gas storage device. The gas supply port of the second gas supply device 141 is used to output gas. connected, the second air supply valve 143 is arranged on the second air supply pipe 142 .

The second gas supply valve 143 is used to control the on-off of the second gas supply pipe 142 , and when the pressure of the hydrogen processing circuit 120 is relatively low, the second gas supply valve 143 is opened to supply gas to the hydrogen processing circuit 120 .

It can be understood that the rate of supplementary air can be controlled by controlling the degree of opening and closing of the second supplementary air valve 143 .

In an example, the second supplementary air valve 143 can be switched manually.

In another example, the second air supplement valve 143 can also be electrically connected to the pressure gauges of the first oxygen separator 111a and the pressure gauges of the first hydrogen separator 121a respectively, and is used to control the action according to the signals of the two pressure gauges.

In yet another example, the second supplementary air valve 143 may also be electrically connected to the differential pressure detection device 150 , and directly guide the work through the differential pressure signal of the differential pressure detection device 150 .

It can be understood that since the main purpose of the water electrolysis hydrogen production system 100 is to produce hydrogen, the second gas supply device 140 can only supply hydrogen to the hydrogen processing circuit 120, wherein the second gas supply device 141 can be a hydrogen production equipment or hydrogen storage equipment, for specific settings, please refer to the first gas supply equipment 131.

As shown in FIG. 2 , in some embodiments, a flow meter may be provided on the connecting pipeline between the first gas supply device 130 and the oxygen treatment circuit 110 and the connection pipeline between the second gas supply device 140 and the hydrogen treatment circuit 120 .

When the first gas supply device 130 and the second gas supply device 140 are set to supply gas at the same time to speed up the start-up speed, it is necessary to supplement the gas in proportion to shorten the start-up time and ensure the balance of the system pressure. A first flow meter 134 and a second flow meter 144 are respectively provided on the connecting pipeline between the device 130 and the oxygen treatment circuit 110 and the connecting pipeline between the second gas supply device 140 and the hydrogen treatment circuit 120 to control the first gas supply device 130 and the gas supply rate of the second gas supply device 140 .

In this embodiment, the first air supply valve 133 is electrically connected to the first flow meter 134, and the second air supply valve 143 is electrically connected to the second flow meter 144 respectively, and the first air supply valve 133 and the first air supply valve 133 are controlled according to the signal of the flow meter The opening degree of the second air supply valve 143 further controls the air supply rate.

In this embodiment, the first flowmeter 134 and the second flowmeter 144 can also be electrically connected to the differential pressure detection device 150, and calculate the supplementary flow according to the differential pressure signal of the differential pressure detection device 150, and then control the first supplementary air valve 133 and the opening degree of the second air supplement valve 143 to ensure the stability of the system differential pressure.

As shown in FIG. 3 , the embodiment of the present application also provides a control method of the water electrolysis hydrogen production system 100 as in any one of the above embodiments. The control method of the water electrolysis hydrogen production system 100 includes: step 310 and step 320 .

Step 310, obtaining the pressure difference information of the hydrogen processing circuit 120 and the oxygen processing circuit 110;

In this embodiment, the pressure difference between the hydrogen processing path 120 and the oxygen processing path 110 can be calculated by obtaining the pressure of the hydrogen processing path 120 and the pressure of the oxygen processing path 110 respectively, or the pressure difference between the hydrogen processing path 120 and the oxygen processing path 110 can be calculated. A pressure difference detection device 150 is provided between the paths 110 to directly obtain the pressure difference between the hydrogen treatment path 120 and the oxygen treatment path 110 .

It can be understood that since the one-side line is connected, the pressure difference information of the hydrogen gas processing circuit 120 and the oxygen gas processing circuit 110 can be obtained by obtaining the pressure difference between the hydrogen gas separator and the oxygen gas separator.

Step 320 , controlling the first air supply device 130 and the second air supply device 140 based on the pressure difference information.

In this embodiment, according to the differential pressure information, the first gas supply device 130 is controlled to supply gas to the oxygen treatment circuit 110, and the second gas supply device 140 is controlled to supply gas to the hydrogen treatment circuit 120. When the pressure of the road 120 is low and the pressure difference between the two exceeds the optimal range, the first gas supply device 130 is controlled to work so that the pressure of the oxygen processing road 110 increases until the pressure on both sides of the hydrogen and oxygen tends to be the same. When the pressure of the path 120 is lower than the pressure of the oxygen processing path 110, and the pressure difference between the two exceeds the optimum range, the second gas supply device 140 is controlled to work so that the pressure of the hydrogen processing path 120 increases until the pressure on both sides of the hydrogen and oxygen tend to be the same, so as to ensure the stable operation of the electrolyzed water hydrogen production system 100.

According to the electrolyzed water hydrogen production system 100 of the present application, by setting the first gas supply device 130 and the second gas supply device 140, when the pressure of the oxygen processing circuit 110 or the hydrogen processing circuit 120 is low, gas is supplied to the corresponding processing circuit , increase the pressure of the oxygen processing circuit 110 or the hydrogen processing circuit 120, so that the pressure difference between the oxygen processing circuit 110 and the hydrogen processing circuit 120 is controlled within the optimal range, the pressure difference can be adjusted in a large range, avoiding shutdown and debugging, and improving production efficiency, And when starting up, it is possible to shorten the start-up time by supplying gas to the oxygen processing circuit 110 and the hydrogen processing circuit 120 .

Step 320, controlling the first air supply device 130 and the second air supply device 140 based on the pressure difference information, including:

Step 321, when the electrolyzed water hydrogen production system 100 is in operation and the pressure difference between the hydrogen processing circuit 120 and the oxygen processing circuit 110 is greater than the first target value, control the first gas supply device 130 to supply gas to the oxygen processing circuit 110 .

The first target value is the preset maximum optimal pressure difference value. When the water electrolysis hydrogen production system 100 is in operation, the optimal state is maintained when the pressure difference is kept within the first target value. The hydrogen processing circuit 120 and the oxygen processing circuit 120 When the pressure difference in the path 110 is greater than the first target value, it means that the pressure difference exceeds the optimal range, and the first gas supply device 130 is controlled to supply gas to the oxygen treatment path 110 until the pressures of the oxygen treatment path 110 and the hydrogen treatment path 120 tend to same.

Step 322: When the water electrolysis hydrogen production system 100 is in operation and the pressure difference between the hydrogen processing circuit 120 and the oxygen processing circuit 110 is less than the second target value, control the second gas supply device 140 to supply gas to the hydrogen processing circuit 120 .

The second target value is the preset minimum optimal pressure difference value. When the water electrolysis hydrogen production system 100 is in operation, there is a delay in the control of the hydrogen discharge valve, which causes the hydrogen discharge rate to be too fast, thereby reducing the pressure of the hydrogen treatment circuit 120. On the low side, the pressure difference between the hydrogen processing circuit 120 and the oxygen processing circuit 110 is less than the second target value. At this time, the second gas supply device 140 is controlled to supply gas to the hydrogen processing circuit 120 to increase the pressure of the hydrogen processing circuit 120, so that the hydrogen and oxygen The pressure tends to be the same on both sides.

In this embodiment, a fourth target value can also be set. The fourth target value is smaller than the second target value. The fourth target value is set as the minimum controllable pressure difference. Exceeding the fourth target value may cause the pressure difference to exceed the allowable control range, when the pressure difference exceeds the fourth target value, the water electrolysis hydrogen production system 100 is controlled to shut down.

By setting the second gas supply device 140, the work of the first gas supply device 130 and the second gas supply device 140 is guided according to the pressure difference signal, so as to further improve the operation stability of the electrolyzed water hydrogen production system 100, and the controllable pressure difference range is wider. big.

In some embodiments, step 320, controlling the first air supply device 130 and the second air supply device 140 based on the pressure difference information, includes:

Step 323 , when the water electrolysis hydrogen production system 100 is in the startup phase, control the first gas supply device 130 to supply gas to the oxygen processing circuit 110 and control the second gas supply device 140 to supply gas to the hydrogen processing circuit 120 according to the target ratio.

In this embodiment, when the electrolyzed water hydrogen production system 100 is in the start-up phase, the second gas supply device 140 is controlled to supply gas to the hydrogen processing circuit 120 to further increase the pressure increase rate of the hydrogen processing circuit 120, and at the same time follow the target Proportionally supply gas to the oxygen treatment circuit 110, so that the pressure on both sides of hydrogen and oxygen rises evenly, and avoids pressure difference.

On the basis of the original boosting speed of the hydrogen processing circuit 120, the overall pressure boosting speed is further increased, so that the start-up time is further shortened and the production efficiency is improved.

The control method of the water electrolysis hydrogen production system 100 provided in the embodiment of the present application may be executed by the control device of the electrolysis water hydrogen production system 100 . In this embodiment of the present application, the control device of the electrolytic water hydrogen production system 100 is taken as an example to illustrate the control device of the electrolytic water hydrogen production system 100 provided in the embodiment of the present application.

The embodiment of the present application also provides a control device for the hydrogen production system 100 by electrolysis of water.

As shown in FIG. 4 , the control device of the water electrolysis hydrogen production system 100 includes: a first acquisition module 201 and a first control module 202 .

The first acquisition module 201 is used to acquire pressure difference information of the hydrogen processing circuit 120 and the oxygen processing circuit 110 .

The first acquisition module 201 is electrically connected to the pressure difference detection device 150 , or the first acquisition module 201 is electrically connected to the oxygen pressure gauge 114 and the hydrogen pressure gauge to acquire the pressure difference information of the hydrogen processing circuit 120 and the oxygen processing circuit 110 .

The first control module 202 is used for controlling the first air supply device 130 based on the differential pressure information.

The first control module 202 is electrically connected with the first acquisition module 201 and the first gas supply device 130 , and the first control module 202 executes the control method of the hydrogen production system 100 by electrolysis of water according to the pressure difference information.

According to the control device of the water electrolysis hydrogen production system 100 provided in the embodiment of the present application, the pressure difference information is obtained through the first acquisition module 201, and the first gas supply device 130 is controlled by the first control module 202 according to the pressure difference information, so that the oxygen The pressure difference between the processing circuit 110 and the hydrogen processing circuit 120 is controlled within the optimal range, and the pressure difference can be adjusted in a large range, which avoids shutdown and debugging, improves production efficiency, and can shorten the start-up time by supplying gas to the oxygen processing circuit 110 when starting up .

The control device of the water electrolysis hydrogen production system 100 in the embodiment of the present application may be an electronic device, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or other devices other than the terminal. Exemplarily, the electronic device may be a mobile phone, a tablet computer, a notebook computer, a handheld computer, a vehicle electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/virtual reality (virtual reality, VR ) equipment, robots, wearable devices, ultra-mobile personal computer (ultra-mobile personal computer, UMPC), netbook or personal digital assistant (personal digital assistant, PDA), etc., can also serve as server, network attached storage (Network Attached Storage, NAS ), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which are not specifically limited in this embodiment of the present application.

The control device of the water electrolysis hydrogen production system 100 in the embodiment of the present application may be a device with an operating system. The operating system may be a Microsoft (Windows) operating system, an Android (Android) operating system, an IOS operating system, or other possible operating systems, which are not specifically limited in this embodiment of the present application.

The control device of the water electrolysis hydrogen production system 100 provided in the embodiment of the present application can realize various processes realized in the method embodiment in FIG. 5 , and details are not repeated here to avoid repetition.

In some embodiments, as shown in FIG. 5 , the embodiment of the present application also provides an electronic device 400, including a processor 401, a memory 402, and a computer program stored in the memory 402 and operable on the processor 401. When the program is executed by the processor 401, each process of the control method embodiment of the above-mentioned water electrolysis hydrogen production system 100 can be realized, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

It should be noted that the electronic devices in the embodiments of the present application include the above-mentioned mobile electronic devices and non-mobile electronic devices.

The embodiment of the present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the control of the above-mentioned electrolyzed water hydrogen production system 100 is realized. Each process of the method embodiment can achieve the same technical effect, and will not be repeated here to avoid repetition.

Wherein, the processor is the processor in the electronic device in the foregoing embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.

The embodiment of the present application also provides a computer program product, including a computer program, and when the computer program is executed by a processor, the above-mentioned control method of the hydrogen production system 100 by electrolysis of water is implemented.

Wherein, the processor is the processor in the electronic device in the foregoing embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.

The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, the processor is used to run programs or instructions, and realize the various processes of the above-mentioned control method embodiment of the electrolyzed water hydrogen production system 100 , and can achieve the same technical effect, in order to avoid repetition, it will not be repeated here.

It should be understood that the chips mentioned in the embodiments of the present application may also be called system-on-chip, system-on-chip, system-on-a-chip, or system-on-a-chip.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of computer software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, etc.) , optical disc), including several instructions to enable a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application. The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It should be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein, and that references to "first," "second," etc. distinguish Objects are generally of one type, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the specification and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

In the description of this application, "first feature" and "second feature" may include one or more of these features.

In the description of this application, "plurality" means two or more.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the application is defined by the claims and their equivalents.

Claims (11)

1. A hydrogen production system by electrolysis of water, characterized in that it comprises: electrolyzer; An oxygen treatment circuit, the inlet of the oxygen treatment circuit is connected with the oxygen side outlet of the electrolytic cell; A hydrogen treatment path, the inlet of the hydrogen treatment path is connected to the hydrogen side outlet of the electrolyzer; A first gas supply device, the first gas supply device is connected to the oxygen treatment circuit, and is used to selectively supply gas to the oxygen treatment circuit; A second gas supply device, the second gas supply device is connected to the hydrogen processing circuit, and is used for selectively supplementing hydrogen to the hydrogen processing circuit. 2. The water electrolysis hydrogen production system according to claim 1, further comprising: A pressure difference detection device, the pressure difference detection device is connected between the oxygen separator of the oxygen treatment circuit and the hydrogen gas separator of the hydrogen treatment circuit, the first gas supply device is electrically connected to the pressure difference detection device connected, the first gas supply device is used to work based on the signal of the differential pressure detection device. 3. The electrolyzed water hydrogen production system according to claim 2, characterized in that the differential pressure detection device is a differential pressure gauge. 4. The hydrogen production system by electrolysis of water according to claim 2, wherein the oxygen separator is connected to the bottom of the hydrogen separator, and the differential pressure detection device is a differential pressure level gauge. 5. The electrolyzed water hydrogen production system according to any one of claims 1-4, characterized in that the first gas supply device comprises: first air supply pipe; A first gas supply device, the gas supply port of the first gas supply device is connected to the oxygen treatment circuit through the first gas supply pipe; A first air supply valve, the first air supply valve is arranged on the first air supply pipe. 6. The electrolyzed water hydrogen production system according to any one of claims 1-4, wherein the first gas supply device is connected to the top of the oxygen separator of the oxygen treatment circuit; Alternatively, the first gas supply device is used to supply inert gas to the oxygen treatment circuit; Alternatively, the first gas supply device is used to supplement oxygen to the oxygen treatment circuit. 7. The electrolyzed water hydrogen production system according to claim 1, characterized in that, the connecting pipeline between the first gas supply device and the oxygen processing circuit and the second gas supply device and the hydrogen processing circuit Flowmeters are installed on the connecting pipelines. 8. A control method of the water electrolysis hydrogen production system according to any one of claims 1-7, characterized in that it comprises: Acquiring pressure difference information between the hydrogen processing circuit and the oxygen processing circuit; The first air supply device and the second air supply device are controlled based on the pressure difference information. 9. The control method of the water electrolysis hydrogen production system according to claim 8, characterized in that, The controlling the first air supply device and the second air supply device based on the pressure difference information includes: When the electrolyzed water hydrogen production system is in operation, and the pressure difference between the hydrogen treatment circuit and the oxygen treatment circuit is greater than the first target value, control the first gas supply device to Qi; When the electrolyzed water hydrogen production system is in operation, and the pressure difference between the hydrogen treatment circuit and the oxygen treatment circuit is less than the second target value, control the second gas supply device to supply the hydrogen to the hydrogen treatment circuit Qi. 10. The control method of the water electrolysis hydrogen production system according to claim 9, characterized in that, The controlling the first air supply device and the second air supply device based on the pressure difference information includes: When the electrolyzed water hydrogen production system is in the start-up phase, control the first gas supply device to supply gas to the oxygen treatment circuit and control the second gas supply device to supply gas to the hydrogen treatment circuit according to the target ratio gas. 11. A control device for the water electrolysis hydrogen production system according to any one of claims 1-7, characterized in that it comprises: A first acquisition module, configured to acquire pressure difference information between the hydrogen processing circuit and the oxygen processing circuit; A first control module, configured to control the first air supply device and the second air supply device based on the pressure difference information.