阅读说明：本技术 制氢系统和制氢系统的控制方法 (Hydrogen production system and control method for hydrogen production system ) 是由 王志民 刘少名 柴瑞杰 于 2021-10-21 设计创作，主要内容包括：本发明提出了一种制氢系统和制氢系统的控制方法。该制氢系统,包括：电解装置,用于产生混合物；第一分离装置,第一分离装置与电解装置的第一接口连接,用于分离混合物中的氢气；至少一个缓冲装置,至少一个缓冲装置并联设置在第一分离装置的第一输出管路上,用于调节第一分离装置的液位。通过上述方式,一方面,使制氢系统中的氢气不会过量,保证了氢气不会发生倒灌现象,从而减少了气液互串的风险；另一方面,本发明是采用收集氢气的方式进行调节,则提高了制氢速度,保证了对氢气的使用率。(The invention provides a hydrogen production system and a control method of the hydrogen production system. The hydrogen production system comprises: an electrolysis device for producing a mixture; the first separation device is connected with the first interface of the electrolysis device and is used for separating hydrogen in the mixture; and the at least one buffer device is arranged on the first output pipeline of the first separation device in parallel and is used for adjusting the liquid level of the first separation device. By adopting the mode, on one hand, hydrogen in the hydrogen production system is not excessive, and the phenomenon of back flow of the hydrogen is avoided, so that the risk of gas-liquid cross connection is reduced; on the other hand, the invention adopts the mode of collecting hydrogen for adjustment, thus improving the hydrogen production speed and ensuring the utilization rate of hydrogen.)

1. A hydrogen production system, comprising:

an electrolysis device for producing a mixture;

the first separation device is connected with the first interface of the electrolysis device and is used for separating hydrogen in the mixture;

at least one buffer device, the at least one buffer device is parallelly connected to be set up on the first output line of first separator for adjust the liquid level of first separator.

2. The hydrogen generation system of claim 1, wherein the buffer device comprises:

a control valve;

and the control valve is connected with the buffer tank in series.

3. The hydrogen generation system of claim 1, wherein the first separation device comprises:

a first water divider;

the first water separator and the purification device are connected in series on the first output pipeline;

wherein the buffer device is connected in parallel with the first output pipeline between the first water separator and the purification device.

4. The hydrogen production system as claimed in claim 3,

the number of the buffer devices is multiple, and the buffer devices are connected in parallel.

5. The hydrogen generation system of claim 3, wherein the first separation device further comprises:

the first backpressure valve is arranged on the first output pipeline between the first water separator and the purification device in series;

wherein the buffering device is connected in parallel with the first output pipeline between the first water separator and the first back pressure valve.

6. The hydrogen generation system of claim 1, further comprising:

and the three-way valve is arranged on the first output pipeline in series and communicated with the inlet end of the buffer device.

7. The hydrogen generation system of claim 2, wherein the buffer device further comprises:

the one-way valve is connected in series with the outlet of the buffer tank, and the buffer tank is positioned between the control valve and the one-way valve; and the conduction direction of the one-way valve is the direction from the control valve to the buffer tank.

8. The hydrogen generation system of claim 3, wherein the first separation device further comprises:

the inlet of the first separator is connected with the first interface;

a first scrubbing device connected to an outlet of the first separator;

a cooler, the first washing device and the cooler being arranged in series connection on the first output line between the first separator and the first water separator.

9. The hydrogen generation system in accordance with any one of claims 1 to 8, further comprising:

and the second separation device is connected with the second interface of the electrolysis device and is used for separating oxygen in the mixture.

10. The hydrogen production system as claimed in claim 9, wherein the second separation device comprises:

the second separator is connected with a second interface of the electrolysis device;

a second washing device connected to an outlet of the second separator;

the second water separator and the second backpressure valve are sequentially connected in series and are arranged between the exhaust ends of the second washing device and the second separating device.

11. The hydrogen generation system in accordance with any one of claims 1 to 8, further comprising:

the first liquid level sensor is arranged on the first separation device and used for detecting the liquid level of the first separation device.

12. The hydrogen generation system of claim 9, further comprising:

and the second liquid level sensor is arranged on the second separation device and used for detecting the liquid level of the second separation device.

13. A method of controlling a hydrogen production system, for use in the hydrogen production system according to any one of claims 1 to 12, further comprising: a second separation device, the control method comprising:

acquiring a liquid level difference value of the first separation device and the second separation device;

and controlling the conduction of the at least one buffer device according to the liquid level difference value so as to adjust the liquid level of the first separation device.

14. The control method according to claim 13, wherein the at least one buffer device is provided in a plurality, and the step of controlling the at least one buffer device to be turned on according to the liquid level difference specifically comprises:

calculating the change rate or the change value of the liquid level difference, and determining the opening number of the buffer device corresponding to the change rate or the change value according to the change rate or the change value;

and controlling the conduction of the buffer devices of the starting number.

15. The control method of claim 13, wherein the hydrogen production system further comprises: the three-way valve, according to the liquid level difference, the step of controlling at least one buffer device to conduct specifically includes:

and when the liquid level difference value is larger than or equal to the liquid level difference threshold value, controlling the three-way valve to be opened and controlling the at least one buffer device to be conducted.

Technical Field

The application relates to the technical field of hydrogen production, in particular to a hydrogen production system and a control method of the hydrogen production system.

Background

In the related art, in the working process of the alkaline electrolytic hydrogen production device, the internal pressure balance in the whole hydrogen production device is adjusted by directly discharging the redundant hydrogen. The mode of directly discharging hydrogen is adopted, so that on one hand, the use of hydrogen is not facilitated; on the other hand, the directly discharged hydrogen has great safety hazard.

Disclosure of Invention

The present application is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the invention proposes a hydrogen production system.

A second aspect of the invention proposes a control method of a hydrogen production system.

In view of this, according to a first aspect of the present invention, there is provided a hydrogen production system comprising: an electrolysis device for producing a mixture; the first separation device is connected with the first interface of the electrolysis device and is used for separating hydrogen in the mixture; and the at least one buffer device is arranged on the first output pipeline of the first separation device in parallel and is used for adjusting the liquid level of the first separation device.

In the technical scheme, the hydrogen production system is provided with an electrolysis device, a first separation device and at least one buffer device. A mixture comprising hydrogen is produced by the electrolysis device. The mixture enters the first separation device from the first interface of the electrolysis device. The first separation device is used for separating the hydrogen in the inflowing mixture to obtain the separated hydrogen. Furthermore, one or more buffer devices arranged in parallel on a first output pipeline of the first separation device are controlled to collect and process the separated hydrogen so as to reduce and adjust the liquid level of the first separation device, and therefore the liquid level value in the first separation device is guaranteed to be within a reasonable range.

In the technical scheme of the invention, the separation of hydrogen in the mixture generated by the electrolysis device is realized by connecting the first separation device with the first interface of the electrolysis device; and one or more buffer devices are arranged on the first output pipeline of the first separation device in parallel, so that the liquid level of the first separation device is adjusted in a hydrogen collecting mode.

By adopting the mode, on one hand, hydrogen in the hydrogen production system is not excessive, and the phenomenon of back flow of the hydrogen is avoided, so that the risk of gas-liquid cross connection is reduced; on the other hand, the invention adopts the mode of collecting hydrogen to adjust, improves the hydrogen production speed and ensures the utilization rate of hydrogen.

The above-described hydrogen production system according to the present invention may also have the following additional technical features:

in the above technical solution, the buffer device includes: a control valve; and the control valve is connected with the buffer tank in series.

In the technical scheme, the buffer device is provided with a control valve and a buffer tank, and the control valve and the buffer tank are connected in series. Through the arrangement mode, the control of opening or closing the control valve is realized, so that whether the function of the buffer tank is started or not is controlled.

It can be understood that, when the buffer tank is required to collect hydrogen in the hydrogen production system, that is, when the liquid level of the first separation device needs to be adjusted, the control valve is controlled to be opened, so that the buffer tank collects hydrogen; when the hydrogen is not collected by the buffer tank in the hydrogen production system, namely the liquid level of the first separation device is not required to be adjusted, the control valve is controlled to be closed, and the buffer tank does not work.

In any of the above solutions, the first separation device includes: a first water divider; the first water separator and the purifying device are connected in series on the first output pipeline; wherein, the buffer device is connected with a first output pipeline between the first water separator and the purification device in parallel.

In the technical scheme, the first separation device is provided with a first water separator and a purification device, and the first water separator and the purification device are arranged on a first output pipeline of the first separation device in series. And removing liquid in the separated hydrogen through a first water separator. Further, the hydrogen processed by the first water separator is purified by a purification device, so that the purity of the hydrogen prepared by the hydrogen production system is ensured.

Meanwhile, the first output pipeline between the buffer device and the first water divider and the purification device is arranged in parallel, so that the pipeline control between the pipeline where the buffer device is located and the pipeline formed between the first water divider and the purification device is not interfered with each other, and the working independence of each pipeline is ensured.

In any of the above technical solutions, the number of the buffer devices is plural, and the plural buffer devices are connected in parallel with each other.

In the technical scheme, a plurality of buffer devices are arranged in the hydrogen production system. Through the mutual parallel connection setting of a plurality of buffer devices to can each other noninterference independent control between a plurality of buffer devices, guaranteed the independence to buffer device control, thereby guaranteed the rationality of whole hydrogen manufacturing system control process.

In any one of the above technical solutions, the first separation device further includes: the first backpressure valve is arranged on a first output pipeline between the first water separator and the purification device in series; wherein, buffer and first delivery line between first water knockout drum and the first back pressure valve are parallelly connected.

In the technical scheme, a first backpressure valve is further arranged in the first separation device. Through establishing ties first backpressure valve on the first output line between first water knockout drum and purification device to control the opportunity that hydrogen after the first water knockout drum was handled carries out purification treatment through first backpressure valve.

Furthermore, the buffering device is connected in parallel on a first output pipeline between the first water separator and the first backpressure valve, so that the time for purifying the hydrogen collected in the buffering device through the first backpressure valve is controlled.

As can be understood, the first backpressure valve and the purification device are controlled to be opened to purify the hydrogen gas based on the fact that the pressure value in the hydrogen production system is detected to be greater than or equal to the first preset pressure value; and controlling the first back pressure valve and the purification device to be closed based on the fact that the detected pressure value in the hydrogen production system is smaller than a first preset pressure value.

In any of the above embodiments, the hydrogen production system further comprises: and the three-way valve is serially connected on the first output pipeline and communicated with the inlet end of the buffer device.

In the technical scheme, the hydrogen production system is also provided with a three-way valve. And the three-way valve is serially connected on the first output pipeline and communicated with the inlet end of the buffer device.

Through the arrangement mode, when the liquid level of the first separation device in the hydrogen production system is abnormal, the three-way valve is connected with the inlet end of the buffer device, and the control valve is controlled to be opened, so that the buffer tank collects and stores hydrogen, and the liquid level of the first separation device is adjusted.

Specifically, a first interface of the three-way valve is connected with the first water divider, a second interface of the three-way valve is communicated with the purifying device, and a third interface of the three-way valve is communicated with the inlet end of the buffer device. By the arrangement mode, when the liquid level of the first separation device in the hydrogen production system is normal, the first interface and the second interface of the three-way valve are controlled to be communicated so as to ensure the normal work of the hydrogen production system; when the liquid level of the first separation device in the hydrogen production system is abnormal, the first interface and the third interface of the three-way valve are controlled to be communicated, and the control valve is controlled to be opened, so that the buffer tank collects and stores hydrogen, and the liquid level of the first separation device is adjusted.

In any of the above technical solutions, the buffer device further includes: the one-way valve is connected in series with the outlet of the buffer tank, and the buffer tank is positioned between the control valve and the one-way valve; wherein, the conduction direction of the one-way valve is the direction from the control valve to the buffer tank.

In the technical scheme, the buffering device is also provided with a one-way valve. And the one-way valve is connected in series with the outlet of the buffer tank, and the buffer tank is arranged between the control valve and the one-way valve, wherein the conduction direction of the one-way valve is the direction from the control valve to the buffer tank. Through the above setting mode of setting one-way valve position relation and conducting direction, on one hand, the one-way flow of the collected hydrogen from the control valve to the buffer tank is ensured, and on the other hand, the hydrogen in the hydrogen production system is prevented from flowing back to the buffer tank.

In any one of the above technical solutions, the first separation device further includes: the inlet of the first separator is connected with the first interface; the first washing device is connected with the outlet of the first separator; the cooler, the first washing device and the cooler are arranged on a first output pipeline between the first separator and the first water separator in series connection.

In this technical solution, the first separator is further provided with a first separator, a first washing device, and a cooler. The inlet of the first separator is connected with the first interface, the first washing device is connected with the outlet of the first separator, and the first washing device and the cooler are arranged on a first output pipeline between the first separator and the first water separator in series connection.

In the technical scheme of the invention, the mixture is separated by a first separator to separate the hydrogen in the mixture; the separated hydrogen gas carries a large amount of alkaline liquid, and the alkaline liquid is removed after flowing into a first washing device through an outlet of a first separator so as to obtain the cleaned hydrogen gas and ensure the purity of the hydrogen gas; and then the hydrogen gas which is still high in temperature after being cleaned is cooled by the cooler, so that the hydrogen gas which is processed by the first processing device is not high in temperature and less in alkaline impurities, and the safety of processing the hydrogen gas in the subsequent hydrogen preparation process is ensured.

In any of the above embodiments, the hydrogen production system further comprises: and the second separation device is connected with the second interface of the electrolysis device and is used for separating oxygen in the mixture.

In this solution, the hydrogen production system is further provided with a second separation device, wherein the second separation device is connected to the second interface of the electrolysis device to separate oxygen from the mixture.

In the above manner, the rate of separating hydrogen by the first separation device is determined with reference to the rate of separating oxygen by the second separation device, so as to adjust the liquid level of the first separation device.

In any of the above solutions, the second separation device includes: the second separator is connected with a second interface of the electrolysis device; the second washing device is connected with the outlet of the second separator; the second water separator and the second backpressure valve are sequentially connected in series and are arranged between the exhaust ends of the second washing device and the second separating device.

In the technical scheme, the second separator is sequentially provided with a second separator, a second washing device, a second water separator and a second backpressure valve in series connection. Furthermore, the second separator is connected with a second interface of the electrolysis device, the second washing device is connected with an outlet of the second separator, and the second water separator and the second backpressure valve are sequentially connected in series and are arranged between the second washing device and an exhaust end of the second separator.

Through the connection arrangement mode, the generated mixture is separated by a second separator to obtain separated oxygen; cleaning the separated oxygen by a second washing device to remove liquid in the oxygen; and then the second water separator is used for carrying out water removal treatment on the cleaned oxygen so as to ensure the dryness of the oxygen and further ensure the discharge rate of the oxygen finally discharged through the exhaust end.

In any of the above embodiments, the hydrogen production system further comprises: and the first liquid level sensor is arranged on the first separation device and used for detecting the liquid level of the first separation device.

In the technical scheme, the hydrogen production system is further provided with a first liquid level sensor, and the first liquid level sensor is arranged on the first separation device, so that the liquid level of the first separation device is detected, the acquisition of the specific liquid level value of the first separation device is realized, and the accuracy of the liquid level regulation control of the first separation device is ensured.

In any of the above embodiments, the hydrogen production system further comprises: and the second liquid level sensor is arranged on the second separation device and used for detecting the liquid level of the second separation device.

In the technical scheme, the hydrogen production system is further provided with a second liquid level sensor, and the second liquid level sensor is arranged on the second separation device, so that the liquid level of the second separation device is detected, the specific liquid level value of the second separation device is obtained, the liquid level of the first separation device is adjusted according to the liquid level of the second separation device, and the accuracy of pressure adjustment control of the whole hydrogen production system is guaranteed.

According to a second aspect of the present invention, there is provided a method for controlling a hydrogen production system, which is used in the hydrogen production system according to any one of the above technical solutions, the hydrogen production system further comprising: the control method of the second separation device comprises the following steps: acquiring a liquid level difference value of the first separation device and the second separation device; and controlling the conduction of at least one buffer device according to the liquid level difference value so as to adjust the liquid level of the first separation device.

In the technical scheme, the hydrogen production system is provided with an electrolysis device, a first separation device, a second separation device and at least one buffer device. A mixture comprising hydrogen is produced by the electrolysis device. The mixture enters the first separation device from the first interface of the electrolysis device. The first separation device is used for separating the hydrogen in the inflowing mixture to obtain the hydrogen after separation, and the second separation device is used for separating the oxygen in the inflowing mixture to obtain the oxygen after separation. Further, one or more buffer devices arranged in parallel on a first output pipeline of the first separation device are controlled to collect and process the hydrogen subjected to the separation treatment, so that the liquid level of the first separation device is adjusted, and the liquid level value in the first separation device is ensured to be in a reasonable value range relative to the liquid level value of the second separation device, namely, the liquid level difference value of the first separation device and the second separation device is in a reasonable range.

By the mode, on one hand, the difference value between the liquid level in the first separation device and the liquid level in the second separation device is controlled within a reasonable range, so that hydrogen in the hydrogen production system is not excessive, the hydrogen is prevented from flowing backwards, and the risk of gas-liquid cross-connection is reduced; on the other hand, the invention adopts the mode of collecting hydrogen for adjustment, thus improving the hydrogen production speed and ensuring the utilization rate of hydrogen.

In the above technical solution, the number of the at least one buffer device is plural, and the step of controlling the conduction of the at least one buffer device according to the liquid level difference specifically includes: calculating the change rate or the change value of the liquid level difference, and determining the opening number of the buffer devices corresponding to the change rate or the change value according to the change rate or the change value; the buffer devices controlling the number of the starting devices are conducted.

In the technical scheme, the change rate or the change value of the liquid level difference is determined by detecting the liquid level difference of the liquid levels of the first separation device and the second separation device within the preset time. And then determining the opening number of the buffer devices corresponding to the change rate or the change value according to the change rate or the change value, and correspondingly controlling the opening number of the buffer devices to be conducted.

Through the control mode, the number of the hydrogen collecting and buffering devices is changed as required, so that the reasonability of hydrogen collection is ensured, the backflow phenomenon is more accurately avoided, and the accuracy and the safety in the control process of the whole hydrogen production system are improved.

It will be appreciated that the greater the rate of change or value of change, the greater the number of corresponding open cushioning devices, i.e. the rate of change is proportional to the magnitude of the value of change versus the number of open cushioning devices.

Specifically, when the change rate is greater than or equal to a first preset rate threshold and less than a second preset rate threshold, a buffer device is started, or when the change rate is less than the first preset rate threshold, the buffer device is not started; the change rate is greater than or equal to a second preset rate threshold and less than a third preset rate threshold, and two buffer devices are started; and determining the number of the started buffer devices according to the preset speed threshold interval range corresponding to the change speed according to the rule. The first preset speed threshold is smaller than the second preset speed threshold, and the second preset speed threshold is smaller than the third preset speed threshold.

Specifically, when the variation value is greater than or equal to a first preset variation value threshold and less than a second preset variation value threshold, starting a buffer device, or when the variation value is less than the first preset variation value threshold, not starting the buffer device; when the variation value is greater than or equal to a second preset variation value threshold value and smaller than a third preset variation value threshold value, starting the two buffer devices; and determining the number of the started buffer devices according to the preset variation value threshold interval range corresponding to the variation value according to the rule. The first preset variation threshold is smaller than the second preset variation threshold, and the second preset variation threshold is smaller than the third preset variation threshold.

In any of the above embodiments, the hydrogen production system further comprises: the three-way valve according to the liquid level difference, the step that at least one buffer device switches on specifically includes: and when the liquid level difference value is greater than or equal to the liquid level difference threshold value, controlling the three-way valve to be opened and controlling at least one buffer device to be conducted.

In the technical scheme, the hydrogen production system is also provided with a three-way valve. When detecting that the liquid level difference value of the liquid levels of the first separation device and the second separation device is greater than or equal to the liquid level difference threshold value, controlling the three-way valve to open so as to enable hydrogen to enter the buffer device, controlling at least one buffer device to be conducted simultaneously, collecting the hydrogen, ensuring that the hydrogen cannot flow backwards, and reducing the risk of gas-liquid cross-connection.

Specifically, a first port and a second port of the three-way valve are controlled to be opened.

Additional aspects and advantages of the invention 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 invention.

Drawings

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

FIG. 1 shows a schematic diagram of a hydrogen production system according to an embodiment of the present invention;

FIG. 2 shows a schematic flow diagram of a method of controlling a hydrogen production system in accordance with an embodiment of the present invention;

FIG. 3 shows a schematic flow diagram of a method of controlling a hydrogen production system in accordance with an embodiment of the present invention;

FIG. 4 shows a schematic flow diagram of a method of controlling a hydrogen production system in accordance with an embodiment of the present invention.

Wherein, the corresponding relation between the reference numbers and the part names in fig. 1 is:

12 electrolyzer, 14 first separator, 16 buffer, 160 control valve, 162 buffer tank, 142 first water separator, 144 purification device, 146 first back pressure valve, 18 three-way valve, 20 one-way valve, 148 first separator, 1410 first scrubber, 1412 cooler, 22 second separator, 222 second separator, 224 second scrubber, 226 second water separator, 228 second back pressure valve, 24 first level sensor, 26 second level sensor, 28 filter, 30 storage device, 32 solenoid valve, 34 exhaust.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A hydrogen production system and a control method of the hydrogen production system according to some embodiments of the present invention will be described in detail below with reference to fig. 1 to 4.

Example 1:

as shown in fig. 1, according to an embodiment of the first aspect of the present invention, there is provided a hydrogen production system, including: an electrolysis device 12 for producing a mixture; the first separation device 14, the first separation device 14 is connected with the first interface of the electrolysis device 12, and is used for separating hydrogen in the mixture; at least one damping device 16, the at least one damping device 16 being arranged in parallel on the first output line of the first separating device 14 for regulating the liquid level of the first separating device 14.

In this embodiment, the hydrogen production system is provided with an electrolysis device 12, a first separation device 14, and at least one buffer device 16. A mixture comprising hydrogen is produced by the electrolysis device 12. The mixture enters the first separation device 14 from the first interface of the electrolysis device 12. The first separation device 14 performs a separation process on the hydrogen gas in the inflow mixture to obtain a hydrogen gas after the separation process. Further, the hydrogen gas after the separation treatment is collected and treated by controlling one or more buffering devices 16 which are arranged in parallel on the first output pipeline of the first separation device 14, so that the liquid level of the first separation device 14 is reduced and adjusted, and the liquid level value in the first separation device 14 is ensured to be in a reasonable range.

Specifically, in the embodiment of the present invention, the first separation device 14 is connected to the first interface of the electrolysis device 12, so as to separate the hydrogen in the mixture generated by the electrolysis device 12; one or more buffer devices 16 are arranged in parallel on the first output pipeline of the first separation device 14, so that the liquid level of the first separation device 14 is adjusted in a hydrogen collecting mode.

By adopting the mode, on one hand, hydrogen in the hydrogen production system is not excessive, and the phenomenon of back flow of the hydrogen is avoided, so that the risk of gas-liquid cross connection is reduced; on the other hand, the invention adopts the mode of collecting hydrogen for adjustment, thus improving the hydrogen production speed and ensuring the utilization rate of hydrogen.

Example 2:

in the above embodiment, as shown in fig. 1, according to an embodiment of the present invention, on the basis of the above embodiment, further, the buffering device 16 includes: a control valve 160; a buffer tank 162, wherein the control valve 160 is connected in series with the buffer tank 162. In this embodiment, the damper device 16 is provided with a control valve 160 and a damper tank 162, and the control valve 160 and the damper tank 162 are provided in series. With the above arrangement, control of opening or closing of the control valve 160 is realized to control whether the buffer tank 162 is activated or not.

It can be understood that, when the hydrogen gas needs to be collected by the buffer tank 162 in the hydrogen production system, that is, when the liquid level of the first separation device 14 needs to be adjusted, the control valve 160 is controlled to be opened, so that the hydrogen gas is collected by the buffer tank 162; when the hydrogen gas is not collected by the buffer tank 162 in the hydrogen production system, that is, when the liquid level of the first separation device 14 is not required to be adjusted, the control valve 160 is closed and the buffer tank 162 is not operated.

It should be noted that during the start-up and power change of the hydrogen production system, the liquid level difference between the liquid levels of the first separation device 14 and the second separation device 22 occurs because the hydrogen generation rate is 2 times the oxygen generation rate.

Example 3:

in any of the above embodiments, as shown in fig. 1, according to an embodiment of the present invention, on the basis of the above embodiment, further, the first separating device 14 includes: a first water separator 142; the purifying device 144, the first water separator 142 and the purifying device 144 are connected in series on the first output pipeline; wherein the buffering device 16 is connected in parallel with the first output line between the first water separator 142 and the purifying device 144.

In this embodiment, the first separating device 14 is provided with a first water separator 142 and a purifying device 144, and the first water separator 142 and the purifying device 144 are arranged in series on a first output line of the first separating device 14. The liquid (e.g., water vapor) in the separated hydrogen gas is removed by the first water separator 142. Further, the hydrogen gas processed by the first water separator 142 is purified by the purification device 144, so that the purity of the hydrogen gas produced by the hydrogen production system is ensured.

Meanwhile, the buffering device 16 is connected in parallel with the first output pipeline between the first water separator 142 and the purifying device 144, so that the pipeline control between the pipeline where the buffering device 16 is located and the pipeline formed between the first water separator 142 and the purifying device 144 is not interfered with each other, and the working independence of each pipeline is ensured.

Example 4:

as shown in fig. 1, according to an embodiment of the present invention, on the basis of the above embodiment, further, the number of the buffer devices 16 is plural, and the plural buffer devices 16 are connected in parallel with each other.

In this embodiment, a plurality of buffer devices 16 are provided in the hydrogen production system. The plurality of buffering devices 16 are connected in parallel, so that the plurality of buffering devices 16 can be independently controlled without mutual interference, and the control independence of the buffering devices 16 is ensured, thereby ensuring the reasonability of the control process of the whole hydrogen production system.

Example 5:

as shown in fig. 1, according to an embodiment of the present invention, on the basis of the above embodiment, further, the first separating device 14 further includes: a first backpressure valve 146, the first backpressure valve 146 being arranged in series on a first output line between the first water separator 142 and the purification device 144; wherein the damping device 16 is connected in parallel with the first output line between the first water separator 142 and the first back pressure valve 146.

In this embodiment, a first backpressure valve 146 is also provided in the first separator 14. The first backpressure valve 146 is serially arranged on the first output pipeline between the first water separator 142 and the purification device 144, so that the time for performing purification treatment on the hydrogen gas treated by the first water separator 142 is controlled through the first backpressure valve 146.

Further, the buffering device 16 is disposed in parallel on the first output line between the first water separator 142 and the first backpressure valve 146, so as to control the timing of purifying the hydrogen collected in the buffering device 16 through the first backpressure valve 146.

As can be appreciated, based on detecting that the pressure value in the hydrogen production system is greater than or equal to the first preset pressure value, the first backpressure valve 146 and the purification device 144 are controlled to be opened to perform the purification treatment on the hydrogen gas; based on detecting that the pressure value in the hydrogen production system is less than the first preset pressure value, first backpressure valve 146 and purification device 144 are controlled to close.

Example 6:

as shown in fig. 1, according to an embodiment of the present invention, on the basis of the above embodiment, further, the hydrogen production system further includes: a three-way valve 18, the three-way valve 18 being arranged in series on the first output line, the three-way valve 18 being in communication with the inlet end of the damping device 16.

In this embodiment, the hydrogen production system is also provided with a three-way valve 18. A three-way valve 18 is disposed in series on the first output line, the three-way valve 18 communicating with the inlet end of the buffer device 16.

Through the arrangement mode, when the liquid level of the first separation device 14 in the hydrogen production system is abnormal, the control three-way valve 18 is communicated with the inlet end of the buffer device 16, and the control valve 160 is controlled to be opened, so that the buffer tank 162 collects and stores hydrogen, and the liquid level of the first separation device 14 is adjusted.

Specifically, a first port of the three-way valve 18 is connected to the first water separator, a second port of the three-way valve 18 is communicated with the purification device, and a third port of the three-way valve 18 is communicated with the inlet end of the buffer device 16.

Through the arrangement mode, when the liquid level of the first separation device 14 in the hydrogen production system is normal, the first interface and the second interface of the three-way valve 18 are controlled to be communicated so as to ensure the normal work of the hydrogen production system; when the liquid level of the first separation device 14 in the hydrogen production system is abnormal, the first interface and the third interface of the three-way valve 18 are controlled to be communicated, and the control valve 160 is controlled to be opened, so that the buffer tank 162 collects and stores hydrogen, and the liquid level of the first separation device 14 is adjusted.

In any of the above embodiments, the buffer device 16 further comprises: the check valve 20, the check valve 20 is connected in series with the outlet of the buffer tank 162, and the buffer tank 162 is positioned between the control valve 160 and the check valve 20; the conducting direction of the check valve 20 is from the control valve 160 to the buffer tank 162.

In this embodiment, the damping device 16 is also provided with a non-return valve 20. And the check valve 20 is connected in series with the outlet of the buffer tank 162, and the buffer tank 162 is arranged between the control valve 160 and the check valve 20, wherein the communication direction of the check valve 20 is the direction from the control valve 160 to the buffer tank 162. Through the above-mentioned setting mode that sets up check valve 20 position relation and conduction direction, guaranteed on the one hand to collect hydrogen and follow control valve 160 to buffer tank 162 direction unidirectional flow, on the other hand has prevented among the hydrogen manufacturing system hydrogen backward flow to buffer tank 162 in.

Example 7:

as shown in fig. 1, according to an embodiment of the present invention, on the basis of the above embodiment, further, the first separating device 14 further includes: a first separator 148, an inlet of the first separator 148 being connected to the first port; a first washing device 1410, the first washing device 1410 being connected to the outlet of the first separator 148; a cooler 1412, a first washing device 1410 and the cooler 1412 are arranged in series on a first output line between the first separator 148 and the first water separator 142.

In this embodiment, the first separating device 14 is further provided with a first separator 148, a first washing device 1410 and a cooler 1412. Wherein the inlet of the first separator 148 is connected to the first interface, the first washing device 1410 is connected to the outlet of the first separator 148, and the first washing device 1410 and the cooler 1412 are arranged in series on the first output line between the first separator 148 and the first water separator 142.

In the embodiment of the present invention, the mixture is first separated by the first separator 148 to separate the hydrogen from the mixture; the separated hydrogen gas may contain a large amount of liquid, and after flowing into the first washing device 1410 through the outlet of the first separator 148, the liquid is removed to obtain the cleaned hydrogen gas, so as to ensure the purity of the hydrogen gas; and then the hydrogen gas with still high temperature after cleaning is cooled by the cooler 1412, so that the hydrogen gas treated by the first treatment device has low temperature and less impurities, thereby ensuring the safety of hydrogen gas treatment in the subsequent hydrogen preparation process.

Example 8:

as shown in fig. 1, according to an embodiment of the present invention, on the basis of the above embodiment, further, the hydrogen production system further includes: and the second separation device 22, wherein the second separation device 22 is connected with the second interface of the electrolysis device 12 and is used for separating oxygen in the mixture.

In this embodiment, the hydrogen production system is further provided with a second separation device 22, wherein the second separation device 22 is connected to the second interface of the electrolysis device 12 for separating oxygen from the mixture.

In the above manner, the rate at which the first separation device 14 separates hydrogen is determined with reference to the rate at which the second separation device 22 separates oxygen to adjust the level of the first separation device 14.

Example 9:

as shown in fig. 1, according to an embodiment of the present invention, on the basis of the above embodiment, further, the second separation device 22 includes: a second separator 222 connected to a second port of the electrolyzer 12; a second washing device 224, the second washing device 224 being connected to the outlet of the second separator 222; a second water separator 226 and a second backpressure valve 228, the second water separator 226 and the second backpressure valve 228 being arranged in series between the second washing arrangement 224 and the exhaust end 34 of the second separating arrangement 22.

In this embodiment, the second separator 22 is provided with a second separator 222, a second washing device 224, a second water separator 226 and a second backpressure valve 228 in series in this order. Further, a second separator 222 is provided in connection with the second interface of the electrolysis device 12, a second scrubber 224 is provided in connection with the outlet of the second separator 222, a second water separator 226 and a second backpressure valve 228 are provided in series between the second scrubber 224 and the exhaust end 34 of the second separator 22.

Through the above connection arrangement, the generated mixture is separated by the second separator 222 to obtain separated oxygen; the separated oxygen is cleaned by the second cleaning device 224 to remove the liquid in the oxygen; the cleaned oxygen is then subjected to a water removal process by the second water separator 226 to ensure the dryness of the oxygen and thus the rate of discharge of the oxygen through the discharge end 34.

It should be noted that, as shown in fig. 1, in order to ensure the recycling of the whole hydrogen production system, the first separator 148 and the second separator 222 are respectively connected with the filter 28, and the filter 28 is communicated with the electrolysis device 12 through the solenoid valve 32, so that the liquid in the first separator 148 and the second separator 222 is recycled by the electrolysis device 12.

As will be appreciated by those skilled in the art, in any of the embodiments of the present application, the electrolysis device 12 is connected to the storage device 30 to provide the electrolysis reaction solution for the electrolysis reaction of the electrolysis device 12.

Example 10:

as shown in fig. 1, according to an embodiment of the present invention, on the basis of the above embodiment, further, the hydrogen production system further includes: a first level sensor 24, the first level sensor 24 being arranged on the first separating apparatus 14 for detecting the level of the liquid in the first separating apparatus 14.

In this embodiment, the hydrogen production system is further provided with a first liquid level sensor 24, and the first liquid level sensor 24 is arranged on the first separation device 14 to detect the liquid level of the first separation device 14, so that the specific liquid level value of the first separation device 14 is obtained, and the accuracy of the liquid level regulation control of the first separation device 14 is ensured.

Example 11:

as shown in fig. 1, according to an embodiment of the present invention, on the basis of the above embodiment, further, the hydrogen production system further includes: a second liquid level sensor 26, the second liquid level sensor 26 being arranged on the second separating means 22 for detecting the liquid level of the second separating means 22.

In this embodiment, the hydrogen production system is further provided with a second liquid level sensor 26, and the second liquid level sensor 26 is arranged on the second separation device 22, so that the liquid level of the second separation device 22 is detected, and the specific liquid level value of the second separation device 22 is obtained, so that the liquid level of the first separation device 14 is adjusted by the liquid level reference of the second separation device 22, and the accuracy of pressure adjustment control of the whole hydrogen production system is ensured.

Example 12:

according to a second aspect of the present invention, as shown in fig. 2, there is provided a method for controlling a hydrogen production system, which is used for the hydrogen production system according to any one of the above embodiments, the hydrogen production system further includes: the control method of the second separation device comprises the following steps:

step 202, acquiring a liquid level difference value of a first separation device and a second separation device;

and 204, controlling the conduction of at least one buffer device according to the liquid level difference value so as to adjust the liquid level of the first separation device.

In this embodiment, the hydrogen production system is provided with an electrolysis device, a first separation device, a second separation device, and at least one buffer device. A mixture comprising hydrogen is produced by the electrolysis device. The mixture enters the first separation device from the first interface of the electrolysis device. The first separation device separates hydrogen in the inflowing mixture to obtain separated hydrogen, and the second separation device separates hydrogen in the inflowing mixture to obtain separated oxygen. Further, through controlling one or more buffering devices arranged in parallel on a first output pipeline of the first separation device to collect and process the separated hydrogen, the liquid level of the first separation device is adjusted, and therefore the liquid level value in the first separation device is guaranteed to be within a reasonable value range relative to the liquid level value of the second separation device, namely the liquid level difference value of the first separation device and the second separation device is within a reasonable range.

By the mode, on one hand, the difference value between the liquid level in the first separation device and the liquid level in the second separation device is controlled within a reasonable range, so that hydrogen in the hydrogen production system is not excessive, the hydrogen is prevented from flowing backwards, and the risk of gas-liquid cross-connection is reduced; on the other hand, the invention adopts the mode of collecting hydrogen for adjustment, thus improving the hydrogen production speed and ensuring the utilization rate of hydrogen.

In some embodiments, the difference in liquid level between the liquid level of the first separation device and the liquid level of the second separation device is typically defined to be between 0.5cm and 2 cm.

In the above embodiment, the number of the at least one buffer device is plural, and the step of controlling the conduction of the at least one buffer device according to the liquid level difference specifically includes: calculating the change rate or the change value of the liquid level difference, and determining the opening number of the buffer devices corresponding to the change rate or the change value according to the change rate or the change value; the buffer devices controlling the number of the starting devices are conducted.

In this embodiment, the rate of change or value of change of the level difference is determined by detecting the level difference of the liquid levels of the first and second separation devices over a preset time. And then determining the opening number of the buffer devices corresponding to the change rate or the change value according to the change rate or the change value, and correspondingly controlling the opening number of the buffer devices to be conducted.

Specifically, the liquid level difference is a variation value, and the liquid level difference divided by the preset time is a variation rate. Through the control mode, the number of the hydrogen collecting and buffering devices is changed as required, so that the reasonability of hydrogen collection is ensured, the backflow phenomenon is more accurately avoided, and the accuracy and the safety in the control process of the whole hydrogen production system are improved.

It will be appreciated that the greater the rate of change, the greater the number of correspondingly activated damping devices, i.e. the corresponding relationship between the magnitude of the rate of change and the number of activated damping devices is proportional. Specifically, when the change rate is greater than or equal to a first preset rate threshold and less than a second preset rate threshold, a buffer device is started, or when the change rate is less than the first preset rate threshold, the buffer device is not started; the change rate is greater than or equal to a second preset rate threshold and less than a third preset rate threshold, and two buffer devices are started; and determining the number of the started buffer devices according to the preset speed threshold interval range corresponding to the change speed according to the rule.

The first preset speed threshold is smaller than the second preset speed threshold, and the second preset speed threshold is smaller than the third preset speed threshold.

Specifically, when the variation value is greater than or equal to a first preset variation value threshold and less than a second preset variation value threshold, starting a buffer device, or when the variation value is less than the first preset variation value threshold, not starting the buffer device; when the variation value is greater than or equal to a second preset variation value threshold value and smaller than a third preset variation value threshold value, starting the two buffer devices; and determining the number of the started buffer devices according to the preset variation value threshold interval range corresponding to the variation value according to the rule. The first preset variation threshold is smaller than the second preset variation threshold, and the second preset variation threshold is smaller than the third preset variation threshold.

In any of the above embodiments, the hydrogen production system further comprises: the three-way valve according to the liquid level difference, the step that at least one buffer device switches on specifically includes: and when the liquid level difference value is greater than or equal to the liquid level difference threshold value, controlling the three-way valve to be opened and controlling at least one buffer device to be conducted.

In this embodiment, the hydrogen production system is also provided with a three-way valve. When detecting that the liquid level difference value of the liquid levels of the first separation device and the second separation device is greater than or equal to the liquid level difference threshold value, controlling the three-way valve to open so as to enable hydrogen to enter the buffer device, controlling at least one buffer device to be conducted simultaneously, collecting the hydrogen, ensuring that the hydrogen cannot flow backwards, and reducing the risk of gas-liquid cross-connection.

Specifically, the first interface and the second interface of the three-way valve are controlled to be opened, so that hydrogen enters the buffer device.

Example 13:

according to an embodiment of the present invention, as shown in fig. 1, 1 or more buffer devices are connected in parallel between the rear end of the first separating device and the front end of the first back pressure valve, and each buffer device may correspond to a liquid level difference of a certain height. Therefore, the present embodiment proposes a method for controlling a hydrogen production system, taking three buffering devices as an example for the above-mentioned devices. The method automatically controls and starts 1 or more buffer devices based on the liquid level difference value of the first separation device and the second separation device so as to reduce the liquid level difference value of the first separation device and the second separation device, thereby ensuring the safety of the system. As shown in fig. 3, the method for controlling the hydrogen production system includes:

step 302, acquiring a liquid level difference value of a first separation device and a second separation device within a preset time;

step 304, judging whether the liquid level difference value is smaller than a first liquid level difference threshold value, if so, entering step 306, and if not, entering step 308;

step 306, maintaining the existing operation state of the hydrogen production system;

step 308, judging whether the liquid level difference value is smaller than a second liquid level difference threshold value, if so, entering step 310, and if not, entering step 312;

step 310, only one buffer device needs to be controlled to be opened;

step 312, judging whether the liquid level difference value is smaller than a third liquid level difference threshold value, if so, entering step 314, and if not, entering step 316;

step 314, controlling the two buffer devices to be opened;

step 316, controlling the three buffer devices to be opened;

step 318, judging whether the first backpressure valve is greater than or equal to a first pressure threshold value, if so, entering step 320, otherwise, entering step 322;

step 320, controlling the back pressure valve and the purification device to be opened;

step 322, control the back pressure valve and the purification device to close.

In the technical scheme, the liquid level difference value between the first separation device and the second separation device is monitored by observing the liquid level sensor within the preset time, and the specific range from the first liquid level difference threshold value to the third liquid level difference threshold value of the liquid level difference value is determined, so that the number of the started buffer devices is determined. Specifically, the liquid level of the first separation device is rapidly adjusted by opening 1 or 2 or 3 or more buffer devices, so that the liquid level difference value of the first separation device and the second separation device is within a reasonable range, and the danger caused by mutual gas-liquid series due to overlarge liquid level difference is avoided. Wherein the volume of the buffer device corresponds to the height of the liquid level difference between the first separation device and the certain second separation device.

The first liquid level difference threshold value, the second liquid level difference threshold value and the third liquid level difference threshold value are determined according to the volume of the buffer device corresponding to the first liquid level difference threshold value, the second liquid level difference threshold value and the third liquid level difference threshold value. Typically the first level difference threshold is set between 0.5cm and 2 cm. The first liquid level difference threshold value is smaller than or equal to the second liquid level difference threshold value, and the second liquid level difference threshold value is smaller than the third liquid level difference threshold value.

Specifically, the rate of change is calculated from the difference in liquid level formed within a preset time, i.e., the difference in liquid level divided by the preset time equals the rate of change. The first liquid level difference threshold divided by the preset time equals a first rate threshold, the second liquid level difference threshold divided by the preset time equals a second rate threshold, and the third liquid level difference threshold divided by the preset time equals a third rate threshold.

Further, when the pressure of the hydrogen production system is detected to be greater than or equal to a preset first pressure threshold value, the opening of the back pressure valve is controlled, and meanwhile, the opening of the purification device is also controlled. The hydrogen generated by the system is purified to control the purity of the prepared hydrogen.

The hydrogen gas after the purification treatment may be hydrogen gas collected by the buffer device or hydrogen gas after water separation treatment.

Example 14:

according to an embodiment of the present invention, as shown in fig. 1, 1 or more buffer devices are connected in parallel between the rear end of the first separating device and the front end of the first back pressure valve, and each buffer device may correspond to a liquid level difference of a certain height. Therefore, for the above-mentioned devices, taking three buffering devices as an example, the present embodiment proposes a workflow of a control method of a hydrogen production system as shown in fig. 4. Wherein the first liquid level difference threshold value is 0.5cm, the second liquid level difference threshold value is 0.5cm, and the third liquid level difference threshold value is 1 cm.

Step 402, acquiring a liquid level difference value of a first separation device and a second separation device within a preset time;

step 404, judging whether the liquid level difference value is smaller than a first liquid level difference threshold value, if so, entering step 406, and if not, entering step 408;

step 406, maintaining the existing operation state of the hydrogen production system;

step 408, judging whether the liquid level difference value is smaller than a second liquid level difference threshold value, if so, entering step 410, and if not, entering step 412;

step 410, only one buffer device needs to be controlled to be opened;

step 412, judging whether the liquid level difference value is smaller than a third liquid level difference threshold value, if so, entering step 414, and if not, entering step 416;

step 414, controlling the two buffer devices to be opened;

and step 416, controlling the three buffer devices to be opened.

When the hydrogen production system works, the electrolysis device generates a mixture. The first separation device separates hydrogen in the inflowing mixture to obtain hydrogen after separation treatment, and the second separation device separates the inflowing mixture to obtain oxygen after separation treatment.

In particular, during start-up and power changes of the oxygen generation system, a difference in liquid level between the first separation device and the second separation device occurs due to the fact that the hydrogen generation rate is 2 times the oxygen generation rate. The liquid level difference between the first separation device and the second separation device is monitored by observing the liquid level sensor within the preset time, and the liquid level difference is judged to exceed a first liquid level difference threshold value, specifically, the first liquid level difference threshold value is 0.5cm, namely when the liquid level difference is less than or equal to 0.5cm, the liquid level difference does not affect the safety of the hydrogen production system, and the hydrogen production system is kept in a normal working state. When the liquid level difference is larger than 0.5cm, the safety of the hydrogen production system is affected by the height of the liquid level difference, so that the buffer device is started to reduce the liquid level difference of the first separation device and the second separation device and keep the normal working state of the hydrogen production system.

When the power change speed of the hydrogen production system is too high, the change speed of the liquid level difference between the first separation device and the second separation device is very high, the liquid level difference between the first separation device and the second separation device is continuously monitored by the liquid level sensor under the state that one buffer device is opened, and when the liquid level difference between the first separation device and the second separation device is still increased within a preset time and exceeds a second liquid level difference threshold value, wherein the second liquid level difference threshold value is 0.5 cm. And under the condition of keeping one buffer device open, the second buffer device is opened, so that the two buffer devices act simultaneously to reduce the liquid level difference value of the first separation device and the second separation device and keep the normal working state of the hydrogen production system.

When the power change speed of the hydrogen production system is extremely high, the change speed of the liquid level difference between the first separation device and the second separation device is extremely high, and the liquid level difference between the first separation device and the second separation device is continuously monitored through the liquid level sensor under the condition that the two buffer devices are opened. And when the liquid level difference value of the first separation device and the second separation device is still increased within the preset time and exceeds a third liquid level difference threshold value, wherein the third liquid level difference threshold value is 1cm, the third buffer device is started under the condition that the two buffer devices are kept started, so that the three buffer devices act simultaneously to reduce the liquid level difference of the first separation device and the second separation device and keep the normal working state of the hydrogen production system.

According to the control method for improving the regulation rate of the alkaline electrolysis hydrogen production system, by setting the three liquid level difference detection threshold values and the three buffer devices, different numbers of buffer devices can be started according to the actual height of the liquid level difference value, so that the regulation and control of the liquid level difference in the first separation device and the second separation device are realized, the use of redundant resources is avoided, and the actual applicability of the system is improved. Therefore, the system regulation rate is effectively improved, the system safety is improved, and the hydrogen production efficiency is improved.

In the description herein, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly stated or limited otherwise; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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 invention. 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.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.