CN114790551A - Liquid level balance control system and method for water electrolysis hydrogen production equipment - Google Patents
Liquid level balance control system and method for water electrolysis hydrogen production equipment Download PDFInfo
- Publication number
- CN114790551A CN114790551A CN202210307915.1A CN202210307915A CN114790551A CN 114790551 A CN114790551 A CN 114790551A CN 202210307915 A CN202210307915 A CN 202210307915A CN 114790551 A CN114790551 A CN 114790551A
- Authority
- CN
- China
- Prior art keywords
- liquid level
- separator
- hydrogen
- pneumatic
- regulating valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000001257 hydrogen Substances 0.000 title claims abstract description 157
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 157
- 239000007788 liquid Substances 0.000 title claims abstract description 154
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000001105 regulatory effect Effects 0.000 claims abstract description 80
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000001301 oxygen Substances 0.000 claims abstract description 74
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 74
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 68
- 239000010408 film Substances 0.000 claims abstract description 33
- 239000010409 thin film Substances 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 42
- 230000001276 controlling effect Effects 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000007405 data analysis Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
Abstract
The invention relates to a liquid level balance control system and method for water electrolysis hydrogen production equipment, which comprises a first liquid level detector, a second liquid level detector, a valve positioner, a controller and a pneumatic thin film regulating valve group, wherein the first liquid level detector is connected with the second liquid level detector; the liquid level balance of the hydrogen separator and the oxygen separator of the water electrolysis hydrogen production equipment is adjusted through the pneumatic film adjusting valve bank consisting of the plurality of pneumatic film adjusting valves connected in parallel, so that the effective adjusting range of the pneumatic film adjusting valve bank is improved, the water electrolysis hydrogen production equipment can stably run in a wide load power fluctuation range, and the liquid level balance of the hydrogen separator and the oxygen separator of the water electrolysis hydrogen production equipment is effectively adjusted and controlled in the whole process; meanwhile, the water electrolysis hydrogen production equipment has wider application range and lays a foundation for the large-scale application of green hydrogen.
Description
Technical Field
The invention relates to the technical field of hydrogen production by water electrolysis, in particular to a liquid level balance control system and method for hydrogen production equipment by water electrolysis.
Background
The liquid level balance control of the existing water electrolysis hydrogen production equipment usually depends on a single pneumatic film regulating valve to carry out liquid level balance control on a hydrogen/oxygen separator; in actual production, the effective adjustable range of a single pneumatic membrane adjusting valve is generally 30-90%, and the working condition requirement of conventional water electrolyte hydrogen production equipment is met; but for large-capacity water electrolysis hydrogen production equipment, the opening of the pneumatic film regulating valve is less than 10% when the equipment is started initially or runs under low load; or when the pneumatic diaphragm regulating valve is in high-load operation, the opening degree of the pneumatic diaphragm regulating valve is higher than 90%; at the moment, the pneumatic membrane regulating valve is in an uncontrollable state, so that the stable operation of the water electrolysis hydrogen production equipment is influenced; the control mode of a single pneumatic film regulating valve can only meet the liquid level balance control of the water electrolysis hydrogen production equipment with small power fluctuation; meanwhile, the liquid level balance of the hydrogen/oxygen separator of the large-capacity water electrolysis hydrogen production equipment is difficult to be adjusted and controlled in the whole process.
Renewable energy power (green electricity) hydrogen production (green hydrogen) is highly advocated because of its environmental protection and zero carbon, and a large-capacity water electrolysis hydrogen production device is produced at the same time and is rapidly moving to the market; however, the renewable energy power is limited by the influence of natural conditions such as day and night, season, weather and the like, so that the renewable energy power has the characteristics of obvious fluctuation, intermittence and the like. The method has higher requirements on the control and regulation of the liquid level balance of the water electrolysis hydrogen production equipment, and not only can improve the utilization rate of renewable energy power, but also can ensure the stable operation under the wide load power fluctuation. Obviously, the adjustment mode of the existing single pneumatic membrane valve cannot meet the corresponding control requirement; therefore, a new liquid level balance control system and method for a water electrolysis hydrogen production device is urgently needed in the industry.
Disclosure of Invention
The invention aims to provide a liquid level balance control system and a liquid level balance control method for water electrolysis hydrogen production equipment, which are suitable for stable production operation of the water electrolysis hydrogen production equipment with wide load power fluctuation and can effectively regulate and control the liquid level balance of a hydrogen/oxygen separator of the water electrolysis hydrogen production equipment in the whole process during the production operation of the water electrolysis hydrogen production equipment; the liquid level balance of the hydrogen/oxygen separator refers to the liquid level balance of the hydrogen separator and the oxygen separator.
The invention provides a liquid level balance control system for water electrolysis hydrogen production equipment, which comprises a first liquid level detector, a second liquid level detector, a valve positioner, a controller and a pneumatic thin film regulating valve group, wherein the first liquid level detector is connected with the second liquid level detector;
the pneumatic membrane regulating valve group comprises at least two pneumatic membrane regulating valves; the pneumatic film regulating valve group is formed by connecting two or more pneumatic film regulating valves in parallel;
the first liquid level detector is arranged on the hydrogen separator and used for detecting the liquid level of the hydrogen separator and transmitting the detected liquid level information to the controller; the hydrogen separator is communicated with the hydrogen scrubber, the outlet pipeline of the hydrogen scrubber is provided with the pneumatic membrane regulating valve group, and the pneumatic membrane regulating valve group is used for controlling the flow of the outlet pipeline of the hydrogen scrubber;
the second liquid level detector is arranged on the oxygen separator and used for detecting the liquid level of the oxygen separator and transmitting the detected liquid level information to the controller;
the valve positioner is arranged corresponding to a pneumatic membrane regulating valve of the pneumatic membrane regulating valve group, one valve positioner is arranged corresponding to each pneumatic membrane regulating valve, and the valve positioners are used for converting command electric signals sent by the controller into pneumatic signals, controlling the opening size of the pneumatic membrane regulating valves and feeding the detected opening size of the pneumatic membrane regulating valves back to the controller;
the controller is connected with the first liquid level detector, the second liquid level detector and the valve positioner; the controller is used for carrying out data analysis processing on real-time signals transmitted by the first liquid level detector, the second liquid level detector and the valve positioner, sending out corresponding execution instructions according to data analysis processing results, and controlling the operation of the pneumatic thin film regulating valve group so as to realize liquid level balance control of the water electrolysis hydrogen production equipment.
Furthermore, the pneumatic membrane regulating valve group is formed by connecting two or more pneumatic membrane regulating valves with different flow rates in parallel. Preferably, the throughputs of two or more pneumatic diaphragm regulating valves connected in parallel in the pneumatic diaphragm valve group are ordered according to an equal difference proportion, such as: the flow rate of the first pneumatic membrane regulating valve is 1-500 units, the flow rate of the second pneumatic membrane regulating valve is 500-1500, the flow rate of the third pneumatic membrane regulating valve is 1000-1500, and the like. The controller effectively achieves liquid level balance of a hydrogen separator and an oxygen separator of the water electrolysis hydrogen production equipment under the operation of various load powers by controlling the opening of each pneumatic film regulating valve in the pneumatic film valve group which is sequenced according to the equal difference proportion.
Furthermore, the hydrogen separator is communicated with a hydrogen scrubber, an outlet pipeline of the hydrogen scrubber is provided with the pneumatic membrane regulating valve bank, and the pneumatic membrane regulating valve bank is used for controlling the flow of the outlet pipeline of the hydrogen scrubber.
Further, the first liquid level detector and the second liquid level detector are differential pressure transmitters.
Further, the controller is a PLC programmable controller.
The invention also provides a liquid level balance control method for the water electrolysis hydrogen production equipment, which comprises the following steps:
liquid level detection, which is to respectively detect and acquire liquid level information of a hydrogen separator and an oxygen separator in the water electrolysis hydrogen production equipment;
and analyzing and processing the liquid level information, comparing and analyzing the acquired liquid level information of the hydrogen separator and the oxygen separator, and executing corresponding instruction operation according to the comparison and analysis results of the liquid level information of the hydrogen separator and the oxygen separator.
Further, the respectively detecting and acquiring liquid level information of a hydrogen separator and an oxygen separator in the water electrolysis hydrogen production equipment specifically includes:
detecting the liquid level of the hydrogen separator by using a first liquid level detector, converting a detected liquid level signal into an electric signal and transmitting the electric signal to the controller to obtain liquid level information of the hydrogen separator;
and detecting the liquid level of the oxygen separator by using a second liquid level detector, converting the detected liquid level signal into an electric signal and transmitting the electric signal to the controller to obtain the liquid level information of the oxygen separator.
Further, the obtained liquid level information of the hydrogen separator and the oxygen separator is compared and analyzed, and corresponding instruction operation is executed according to the liquid level information comparison and analysis results of the hydrogen separator and the oxygen separator; the method specifically comprises the following steps: analyzing and comparing the acquired liquid level information of the hydrogen separator and the oxygen separator by using a controller;
if the liquid level value of the hydrogen separator is greater than that of the oxygen separator, the controller sends out a reduction execution instruction to reduce the opening of a pneumatic film regulating valve in a pneumatic film regulating valve group at the side of the hydrogen separator until the liquid level difference between the hydrogen separator and the oxygen separator is stabilized within a threshold range;
if the liquid level value of the hydrogen separator is smaller than that of the oxygen separator, the controller sends an increased execution instruction to increase the opening of the pneumatic film regulating valve in the pneumatic film regulating valve group at the hydrogen separator side until the liquid level difference between the hydrogen separator and the oxygen separator is stabilized within the threshold range.
Further, the threshold range of the liquid level difference of the hydrogen separator and the oxygen separator is +/-5 mm.
Advantageous effects
The technical scheme of the invention has the following advantages: the invention provides a liquid level balance control system for water electrolysis hydrogen production equipment, which comprises a first liquid level detector, a second liquid level detector, a valve positioner, a controller and a pneumatic film regulating valve group, wherein the first liquid level detector is connected with the second liquid level detector; the liquid level balance of the hydrogen separator and the oxygen separator of the water electrolysis hydrogen production equipment is adjusted through the pneumatic film adjusting valve bank consisting of the plurality of pneumatic film adjusting valves connected in parallel, so that the effective adjusting range of the pneumatic film adjusting valve bank is improved, the water electrolysis hydrogen production equipment can stably run in a wide load power fluctuation range, and the liquid level balance of the hydrogen separator and the oxygen separator of the water electrolysis hydrogen production equipment is effectively adjusted and controlled in the whole process; meanwhile, the water electrolysis hydrogen production equipment has wider application range and lays a foundation for the scale application of 'green hydrogen'.
The liquid level balance control method for the water electrolysis hydrogen production equipment corresponds to the beneficial effects obtained by the balance control system, and the discussion is not repeated here.
Drawings
FIG. 1 is a schematic diagram of a liquid level balance control system for a water electrolysis hydrogen production plant according to the present invention;
wherein: 1001. the device comprises an electrolytic cell, 1002, a hydrogen separator, 1003, an oxygen separator, 1004, a hydrogen scrubber, 1005, an oxygen scrubber, 1006, a heat exchanger, L1, a first liquid level detector, L2, a second liquid level detector, LV1, a pneumatic membrane regulating valve (small valve), LV2, a pneumatic membrane regulating valve (large valve), M, a circulating pump, LY1, a valve positioner, a PLC and a programmable controller.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the liquid level balance control system for a water electrolysis hydrogen production device of the invention comprises a first liquid level detector, a second liquid level detector, a valve positioner, a controller and a pneumatic thin film regulating valve group; the pneumatic membrane regulating valve group comprises at least two pneumatic membrane regulating valves; the pneumatic membrane regulating valve group is formed by connecting two or more pneumatic membrane regulating valves in parallel.
The hydrogen production equipment by water electrolysis comprises: an electrolytic cell 1001, a hydrogen separator 1002, an oxygen separator 1003, a hydrogen scrubber 1004, an oxygen scrubber 1005, a heat exchanger 1006, and a circulation pump M;
the hydrogen separator and the oxygen separator are connected in parallel with the electrolytic bath, and the outlet end of the hydrogen separator is communicated with the hydrogen scrubber; the outlet end of the oxygen separator is communicated with the oxygen scrubber; the electrolyzer 1001 is energized to electrolyze water to generate hydrogen and oxygen, and the hydrogen is output through the hydrogen separator 1002 and the hydrogen scrubber 1004. Oxygen is output through an oxygen separator 1003 and an oxygen scrubber 1005. The hydrogen separator 1002 and the oxygen separator 1003 are connected by a pipe at the bottom to keep the gas pressure of the two gas-water separators equal. One end of the heat exchanger 1006 is communicated with the electrolytic cell through a circulating pump, and the other end of the heat exchanger is communicated with the bottom communication pipelines of the hydrogen separator and the oxygen separator; and the cooling medium flows into the electrolytic cell through the inlet of the heat exchanger and the circulating pump M, and then returns to the outlet end of the heat exchanger through the communication pipelines at the bottoms of the hydrogen separator and the oxygen separator, so that the circulating heat exchange of the electrolytic cell is realized.
As an implementation mode, the first liquid level detector and the second liquid level detector both adopt differential pressure transmitters, and the pneumatic membrane regulating valve group is formed by connecting two pneumatic membrane regulating valves with different throughputs in parallel.
The first liquid level detector L1 is mounted on the hydrogen separator 1002; the second level detector L2 is mounted on the oxygen separator 1003; a pneumatic membrane regulating valve (small valve) LV1 and a pneumatic membrane regulating valve (large valve) LV2 are arranged on an outlet pipeline of the hydrogen scrubber 1004 in parallel; a valve positioner LY1 is provided to the pneumatic diaphragm regulating valve (small valve) LV1 and the pneumatic diaphragm regulating valve (large valve) LV2, respectively.
The first liquid level detector L1 detects the liquid level of the hydrogen separator in real time, converts a detected liquid level signal into a 4-20 mA standard electric signal and transmits the signal to the Programmable Logic Controller (PLC); the second liquid level detector L2 detects the liquid level of the oxygen separator in real time, converts a detected liquid level signal into a 4-20 mA standard electric signal and transmits the signal to the programmable controller; the programmable controller receives the real-time liquid level signal transmitted by the transmitter, analyzes and processes the data, and then sends an instruction electric signal to the valve positioner; the valve positioner converts the electric signal into a pneumatic signal, adjusts the opening of the pneumatic film regulating valve, and controls the liquid level balance of the separator of the hydrogen production equipment.
When the water electrolysis hydrogen production equipment runs at the initial start-up or under a small load, the controller controls the pneumatic film regulating valve (large valve) to be closed, and the liquid level balance of the hydrogen/oxygen separator is effectively regulated and controlled through the pneumatic film regulating valve (small valve); when the water electrolysis hydrogen production equipment runs under a large load or an overload, the pneumatic film regulating valve (small valve) is controlled to be closed, and the liquid level balance of the hydrogen/oxygen separator is effectively regulated and controlled through the pneumatic film regulating valve (large valve); and the pneumatic film regulating valve (small valve) and the pneumatic film regulating valve (big valve) are both opened, and the liquid level balance of the hydrogen/oxygen separator is effectively regulated and controlled through the whole pneumatic film regulating valve group connected in parallel. The water electrolysis hydrogen production equipment can effectively adjust and control the liquid level balance of the hydrogen/oxygen separator through the pneumatic film adjusting valve group in the whole process while stably running in a wide load power fluctuation range.
The invention also provides a liquid level balance control method for the water electrolysis hydrogen production equipment, which comprises the following steps:
liquid level detection, which is to respectively detect and acquire liquid level information of a hydrogen separator and an oxygen separator in the water electrolysis hydrogen production equipment; the method specifically comprises the following steps:
detecting the liquid level of the hydrogen separator by using a first liquid level detector, converting a detected liquid level signal into an electric signal and transmitting the electric signal to a programmable controller to obtain liquid level information of the hydrogen separator;
and the second liquid level detector is used for detecting the liquid level of the oxygen separator, converting the detected liquid level signal into an electric signal and transmitting the electric signal to the programmable controller to obtain the liquid level information of the oxygen separator.
Analyzing and processing the liquid level information, comparing and analyzing the obtained liquid level information of the hydrogen separator and the oxygen separator, and executing corresponding instruction operation according to the comparison and analysis results of the liquid level information of the hydrogen separator and the oxygen separator; the method specifically comprises the following steps:
analyzing and comparing the obtained liquid level information of the hydrogen separator and the oxygen separator by using a programmable controller;
if the liquid level value of the hydrogen separator is greater than that of the oxygen separator, the programmable controller sends out a reduction execution instruction to reduce the opening of a pneumatic film regulating valve in a pneumatic film regulating valve group at the side of the hydrogen separator until the liquid level difference between the hydrogen separator and the oxygen separator is stabilized to fluctuate within +/-5 mm of a set threshold range; the stable operation of the water electrolysis hydrogen production equipment in a wide load power fluctuation range of 10-120 percent is ensured, and simultaneously the liquid level balance of the hydrogen/oxygen separator of the hydrogen production equipment is effectively adjusted in the whole process.
If the liquid level value of the hydrogen separator is smaller than that of the oxygen separator, the programmable controller sends an increased execution instruction to increase the opening degree of the pneumatic membrane regulating valve in the pneumatic membrane regulating valve group at the side of the hydrogen separator until the liquid level difference of the hydrogen separator and the oxygen separator is stabilized to fluctuate within the range of the set threshold value +/-5 mm; the stable operation of the water electrolysis hydrogen production equipment in a wide load power fluctuation range of 10-120 percent is ensured, and simultaneously, the liquid level balance of a hydrogen/oxygen separator of the hydrogen production equipment is effectively adjusted in the whole process.
The liquid level balance control method for the water electrolysis hydrogen production equipment corresponds to the beneficial effects obtained by the balance control system, and the discussion is not repeated here.
Claims (9)
1. A liquid level balance control system for water electrolysis hydrogen production equipment is characterized by comprising a first liquid level detector, a second liquid level detector, a valve positioner, a controller and a pneumatic thin film regulating valve group;
the pneumatic membrane regulating valve group comprises at least two pneumatic membrane regulating valves; the pneumatic membrane regulating valve group is formed by connecting two or more pneumatic membrane regulating valves in parallel;
the first liquid level detector is arranged on the hydrogen separator and used for detecting the liquid level of the hydrogen separator and transmitting the detected liquid level information to the controller; the hydrogen separator is communicated with the hydrogen scrubber, the outlet pipeline of the hydrogen scrubber is provided with the pneumatic membrane regulating valve group, and the pneumatic membrane regulating valve group is used for controlling the flow of the outlet pipeline of the hydrogen scrubber;
the second liquid level detector is arranged on the oxygen separator and used for detecting the liquid level of the oxygen separator and transmitting the detected liquid level information to the controller;
the valve positioner is arranged corresponding to a pneumatic membrane regulating valve of the pneumatic membrane regulating valve group, one valve positioner is correspondingly arranged on each pneumatic membrane regulating valve, and the valve positioners are used for converting command electric signals sent by the controller into pneumatic signals, controlling the opening size of the pneumatic membrane regulating valve and feeding the detected opening size of the pneumatic membrane regulating valve back to the controller;
the controller is connected with the first liquid level detector, the second liquid level detector and the valve positioner; the controller is used for carrying out data analysis processing on real-time signals transmitted by the first liquid level detector, the second liquid level detector and the valve positioner, sending out corresponding execution instructions according to data analysis processing results, and controlling the operation of the pneumatic thin film regulating valve group so as to realize liquid level balance control of the water electrolysis hydrogen production equipment.
2. The balance control system of claim 1, wherein the set of pneumatic diaphragm control valves is comprised of two or more pneumatic diaphragm control valves having different throughputs connected in parallel.
3. The balance control system of claim 2, wherein the hydrogen separator is in communication with a hydrogen scrubber, the outlet conduit of the hydrogen scrubber being provided with said set of pneumatic diaphragm regulating valves for controlling the flow rate of the outlet conduit of the hydrogen scrubber.
4. The balance control system of claim 1, wherein the first level detector and the second level detector are differential pressure transmitters.
5. The balance control system of claim 1, wherein the controller is a PLC programmable controller.
6. A control method of a liquid level balance control system for a water electrolysis hydrogen production device based on claims 1-5 is characterized by comprising the following steps:
liquid level detection, which is to respectively detect and acquire liquid level information of a hydrogen separator and an oxygen separator in the water electrolysis hydrogen production equipment;
and analyzing and processing the liquid level information, comparing and analyzing the acquired liquid level information of the hydrogen separator and the oxygen separator, and executing corresponding instruction operation according to the comparison and analysis results of the liquid level information of the hydrogen separator and the oxygen separator.
7. The liquid level balance control method for water electrolysis hydrogen production equipment according to claim 6, wherein the respectively detecting and acquiring the liquid level information of the hydrogen separator and the oxygen separator in the water electrolysis hydrogen production equipment specifically comprises:
detecting the liquid level of the hydrogen separator by using a first liquid level detector, converting a detected liquid level signal into an electric signal and transmitting the electric signal to the controller to obtain liquid level information of the hydrogen separator;
and detecting the liquid level of the oxygen separator by using a second liquid level detector, converting the detected liquid level signal into an electric signal and transmitting the electric signal to the controller to obtain the liquid level information of the oxygen separator.
8. The liquid level balance control method for hydrogen production equipment through water electrolysis as claimed in claim 6, characterized in that the acquired liquid level information of the hydrogen separator and the oxygen separator is compared and analyzed, and corresponding instruction operation is executed according to the comparison and analysis results of the liquid level information of the hydrogen separator and the oxygen separator; the method specifically comprises the following steps: analyzing and comparing the acquired liquid level information of the hydrogen separator and the oxygen separator by using a controller;
if the liquid level value of the hydrogen separator is greater than that of the oxygen separator, the controller sends out a reduction execution instruction to reduce the opening of a pneumatic film regulating valve in a pneumatic film regulating valve group at the side of the hydrogen separator until the liquid level difference between the hydrogen separator and the oxygen separator is stabilized within a threshold range;
if the liquid level value of the hydrogen separator is smaller than that of the oxygen separator, the controller sends an increased execution instruction to increase the opening degree of the pneumatic film regulating valve in the pneumatic film regulating valve group at the side of the hydrogen separator until the liquid level difference between the hydrogen separator and the oxygen separator is stabilized within the threshold range.
9. The method for controlling the liquid level balance of an apparatus for producing hydrogen by water electrolysis according to claim 8, wherein the threshold range of the liquid level difference between the hydrogen separator and the oxygen separator is ± 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210307915.1A CN114790551A (en) | 2022-03-25 | 2022-03-25 | Liquid level balance control system and method for water electrolysis hydrogen production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210307915.1A CN114790551A (en) | 2022-03-25 | 2022-03-25 | Liquid level balance control system and method for water electrolysis hydrogen production equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114790551A true CN114790551A (en) | 2022-07-26 |
Family
ID=82461900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210307915.1A Pending CN114790551A (en) | 2022-03-25 | 2022-03-25 | Liquid level balance control system and method for water electrolysis hydrogen production equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114790551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115992370A (en) * | 2022-12-26 | 2023-04-21 | 陕西华秦新能源科技有限责任公司 | Wide-power fluctuation operation device and method for alkaline water electrolysis hydrogen production system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10626513B1 (en) * | 2019-12-27 | 2020-04-21 | Haiming Li | Water electrolysis hydrogen production plant with a pumpless water supply system and process flow method |
| CN112760679A (en) * | 2021-01-27 | 2021-05-07 | 苏州竞立制氢设备有限公司 | Differential pressure adjusting method and device |
| CN113549953A (en) * | 2021-08-16 | 2021-10-26 | 阳光电源股份有限公司 | Liquid level balance control method of hydrogen production system and hydrogen production system |
| CN113621990A (en) * | 2021-08-03 | 2021-11-09 | 中国船舶重工集团公司第七一八研究所 | Safety instrument system of water electrolysis hydrogen production equipment |
| CN113621975A (en) * | 2021-08-23 | 2021-11-09 | 清华大学 | Device and method for maintaining liquid level balance of alkaline electrolysis system and inhibiting gas leakage risk |
| CN114134527A (en) * | 2021-12-15 | 2022-03-04 | 考克利尔竞立(苏州)氢能科技有限公司 | Water electrolysis hydrogen production device and method with multiple electrolytic baths |
| CN114134514A (en) * | 2021-11-01 | 2022-03-04 | 无锡隆基氢能科技有限公司 | Water electrolysis hydrogen production system |
-
2022
- 2022-03-25 CN CN202210307915.1A patent/CN114790551A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10626513B1 (en) * | 2019-12-27 | 2020-04-21 | Haiming Li | Water electrolysis hydrogen production plant with a pumpless water supply system and process flow method |
| CN112760679A (en) * | 2021-01-27 | 2021-05-07 | 苏州竞立制氢设备有限公司 | Differential pressure adjusting method and device |
| CN113621990A (en) * | 2021-08-03 | 2021-11-09 | 中国船舶重工集团公司第七一八研究所 | Safety instrument system of water electrolysis hydrogen production equipment |
| CN113549953A (en) * | 2021-08-16 | 2021-10-26 | 阳光电源股份有限公司 | Liquid level balance control method of hydrogen production system and hydrogen production system |
| CN113621975A (en) * | 2021-08-23 | 2021-11-09 | 清华大学 | Device and method for maintaining liquid level balance of alkaline electrolysis system and inhibiting gas leakage risk |
| CN114134514A (en) * | 2021-11-01 | 2022-03-04 | 无锡隆基氢能科技有限公司 | Water electrolysis hydrogen production system |
| CN114134527A (en) * | 2021-12-15 | 2022-03-04 | 考克利尔竞立(苏州)氢能科技有限公司 | Water electrolysis hydrogen production device and method with multiple electrolytic baths |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115992370A (en) * | 2022-12-26 | 2023-04-21 | 陕西华秦新能源科技有限责任公司 | Wide-power fluctuation operation device and method for alkaline water electrolysis hydrogen production system |
| CN115992370B (en) * | 2022-12-26 | 2024-01-30 | 陕西华秦新能源科技有限责任公司 | Wide-power fluctuation operation device and method for alkaline water electrolysis hydrogen production system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114134527B (en) | Water electrolysis hydrogen production device and method with multiple electrolytic tanks | |
| CN113215593B (en) | Green hydrogen preparation system of hybrid electrolysis water | |
| CN112899712B (en) | Water electrolysis hydrogen production device and hydrogen production method | |
| CN114086204A (en) | Electrolytic cell array system and electrolytic water system control method | |
| WO2022162249A2 (en) | Differential pressure adjusting method and device | |
| CN114790551A (en) | Liquid level balance control system and method for water electrolysis hydrogen production equipment | |
| CN111059030A (en) | Air compressor three-stage cooling system and method based on dynamic independent control of cooling water quantity | |
| CN108728862A (en) | A kind of method that online hydrogen making machine is arranged in hydrogen station | |
| CN216738567U (en) | Online testing device for integrity of electrolytic cell diaphragm | |
| CN211737408U (en) | Air compressor tertiary cooling system based on cooling water quantity independent control | |
| CN218932321U (en) | Hydrogen production test system | |
| CN218951516U (en) | Oxygen side pure water circulation system in PEM electrolytic tank parallel system | |
| CN220812643U (en) | Gas-liquid separator communicating vessel and water electrolysis hydrogen production system | |
| CN115976572B (en) | Method, system, device and storage medium for controlling gas purity of electrolytic cell | |
| CN214067667U (en) | Fluid medium management device for demand side | |
| WO2022162248A2 (en) | Pressure difference adjusting device | |
| CN218232595U (en) | Water electrolysis hydrogen production system | |
| CN117070963A (en) | Device, system and method for controlling gas purity in water electrolysis hydrogen production system | |
| CN213085537U (en) | Water purifier pressure stabilizing system and water purifier | |
| CN210237490U (en) | Washing tank control system for isooctane prepared from four carbon sources | |
| CN220413543U (en) | Outlet adjusting device, electrolytic water hydrogen production system and hydrogen production station | |
| CN116356346A (en) | Hydrogen production system and hydrogen production system control method | |
| CN113802146B (en) | Electrolytic cell diaphragm integrity online test system and use method | |
| CN117604573B (en) | Nitrogen purging liquid level balance control system for hydrogen production by water electrolysis | |
| CN220379639U (en) | Recycling system of drum furnace water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220726 |
|
| RJ01 | Rejection of invention patent application after publication |