CN114657602B - Water supplementing device and water supplementing method for water electrolysis hydrogen production system - Google Patents
Water supplementing device and water supplementing method for water electrolysis hydrogen production system Download PDFInfo
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- CN114657602B CN114657602B CN202210254113.9A CN202210254113A CN114657602B CN 114657602 B CN114657602 B CN 114657602B CN 202210254113 A CN202210254113 A CN 202210254113A CN 114657602 B CN114657602 B CN 114657602B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 461
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 197
- 239000001257 hydrogen Substances 0.000 title claims abstract description 196
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 196
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 186
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 122
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000001301 oxygen Substances 0.000 claims abstract description 67
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 67
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000005086 pumping Methods 0.000 claims abstract description 46
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 21
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 101
- 238000012544 monitoring process Methods 0.000 claims description 25
- 239000013589 supplement Substances 0.000 claims description 10
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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- 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
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
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- 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
- C25B15/023—Measuring, analysing or testing during electrolytic production
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Automation & Control Theory (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application relates to the technical field of water electrolysis hydrogen production equipment, in particular to a water supplementing device and a water supplementing method for a water electrolysis hydrogen production system, wherein the water supplementing device comprises a water tank, a first valve, a second valve, a third valve, a fourth valve, a pressure stabilizing valve, a water supply pipeline, a pumping device, a water outlet pipeline and at least one water conveying pipeline; the pump design scheme can effectively solve the problem that the whole water supplementing device cannot be used due to the fact that a single pump is used, and the pumping loop is internally provided with the parallel pressure stabilizing valve, so that the normal use of the pump can be guaranteed when the water supplementing at the later stage is abnormal. In addition, the independent water supplementing of the hydrogen separator and the oxygen separator can be effectively realized through the logic control of the control system, the risk of hydrogen-oxygen mixing is avoided, and the safety and the stability of the operation of the water supplementing device and the hydrogen production system are improved.
Description
Technical Field
The application relates to the technical field of water electrolysis hydrogen production equipment, in particular to a water supplementing device and a water supplementing method for a water electrolysis hydrogen production system.
Background
The hydrogen energy sources are attracting attention because of the advantages of no pollution in combustion, high heat generation and the like. The existing technology for preparing hydrogen by electrolyzing water is mature, and the operation is relatively simple, thus being an important means for preparing hydrogen at present and later. The water supplementing device of the existing hydrogen production equipment mostly adopts a one-to-one (1 water supplementing pump corresponds to one set of frame) water supplementing mode, and only depends on a control valve and a water pump to carry out water supplementing on a hydrogen separator and an oxygen separator of the hydrogen production system (the hydrogen production equipment), so that the mixing phenomenon of hydrogen and oxygen is easy to generate, and safety risks are generated; when a plurality of sets of hydrogen production equipment are operated, the water supplementing devices of the sets are operated simultaneously for supplementing water, so that on one hand, the operation risk of the equipment is increased, and on the other hand, the use cost of the equipment is also increased; how to optimize the water replenishing device and the water replenishing mode becomes the focus of the research of the heavy water replenishing device of the current water electrolysis hydrogen production system.
Disclosure of Invention
The application aims to provide a water supplementing device and a water supplementing method for a water electrolysis hydrogen production system, which solve the problems of single water supplementing pump and one-to-one single water supplementing shortage of the existing water supplementing device and hydrogen and oxygen mixing.
The application provides a water replenishing device for a water electrolysis hydrogen production system, which comprises a water supply pipeline, a water outlet pipeline and at least one water delivery pipeline, wherein the water supply pipeline is connected with the water delivery pipeline; the water outlet pipeline comprises an input pipeline and an output pipeline which are connected;
at least one water tank is arranged between the water supply pipeline and the input pipeline, and a plurality of water tanks are arranged between the water supply pipeline and the input pipeline in parallel; the water inlet of the water tank is connected with a water supply pipeline, and a first valve is arranged between the water inlet and the water supply pipeline;
the water outlet of the water tank is connected with an input pipeline, and a second valve is arranged between the water outlet and the input pipeline; the output pipeline is provided with at least one water supply interface, and a plurality of water delivery pipelines are correspondingly connected with a plurality of water supply interfaces of the output pipeline; the output ends of the water delivery pipelines are respectively connected with a plurality of water electrolysis hydrogen production systems for supplementing water of the water electrolysis hydrogen production systems;
the water delivery pipeline comprises a hydrogen side water supplementing pipeline and an oxygen side water supplementing pipeline which are arranged in parallel, a water supplementing outlet of the hydrogen side water supplementing pipeline is provided with a third valve, and the third valve is connected with a hydrogen separator or a hydrogen scrubber of the water electrolysis hydrogen production system; the water supplementing outlet of the oxygen side water supplementing pipeline is provided with a fourth valve which is connected with an oxygen separator or an oxygen scrubber of the water electrolysis hydrogen production system.
Further, the water replenishing device of the application further comprises a pumping unit, wherein the pumping unit comprises a first pumping loop, and the first pumping loop is arranged on the output pipeline and is positioned at the front end of the water supply interface; the first pumping circuit comprises a first ball valve, a first filter, a first water supplementing pump, a first check valve and a second ball valve which are sequentially arranged.
Further, the pumping unit comprises a second pumping circuit; the second pumping circuit is arranged in parallel with the first pumping circuit, and comprises a third ball valve, a second filter, a second water supplementing pump, a second check valve and a fourth ball valve which are sequentially arranged.
Further, the water supplementing device also comprises a pressure stabilizing loop, and the pressure stabilizing loop comprises a pressure stabilizing valve; the pressure stabilizing valve is arranged in parallel with the pumping unit and used for stabilizing the pressure of the first pumping loop and/or the second pumping loop.
Further, a pressure monitoring unit and/or a flow monitoring unit are/is arranged on the output pipeline between the pumping unit and the water supply interface, the pressure monitoring unit is used for monitoring the pressure of the output pipeline, and the flow monitoring unit is used for detecting the flow of the output pipeline.
Further, the pressure monitoring unit comprises a pressure transmitter and a pressure gauge which are arranged in parallel; the flow monitoring unit includes a flow meter.
Further, each water tank is provided with a liquid level meter, and the liquid level meter is used for monitoring the liquid level of the water tank; the bottom of the water tank is provided with a sewage outlet.
Further, each water tank is further provided with a fifth valve, and the fifth valve is arranged in parallel with the first valve and is positioned between the water supply pipeline and the input pipeline.
The application also provides a water supplementing method for the water electrolysis hydrogen production system, which comprises the water supplementing device for the water electrolysis hydrogen production system, and comprises the following steps of:
setting a water supplementing liquid level threshold of the hydrogen production system; and acquiring the water supplementing liquid level information of each hydrogen production system, and controlling and executing corresponding water supplementing operation according to the water supplementing liquid level information of each hydrogen production system.
Further, the water replenishing liquid level threshold of the hydrogen production systems is set, water replenishing liquid level information of each hydrogen production system is obtained, and corresponding water replenishing operation is controlled and executed according to the water replenishing liquid level information of each hydrogen production system; the method specifically comprises the following steps:
the current water supplementing liquid level information of the hydrogen production systems is larger than the set water supplementing liquid level threshold value, which means that the hydrogen production systems are in a full state and water supplementing is not needed, and at the moment, the third valve and the fourth valve of each water conveying pipeline are not opened;
in the plurality of hydrogen production systems, if the current water supplementing liquid level information of one hydrogen production system is smaller than a set water supplementing liquid level threshold value, a third valve or a fourth valve of a water conveying pipeline of the hydrogen production system is opened, and after the hydrogen side and the oxygen side of the hydrogen production system are subjected to independent water supplementing, the hydrogen side of the hydrogen production system is subjected to independent water supplementing, or the oxygen side of the hydrogen production system is subjected to independent water supplementing, and then the hydrogen side is subjected to independent water supplementing; the water replenishing completion judgment is that the water replenishing liquid level information rises to a set water replenishing liquid level threshold value;
in the hydrogen production systems, the current water supplementing liquid level information of the hydrogen production systems does not reach the set water supplementing liquid level threshold value, the water supplementing is preferentially carried out on the side with the minimum water supplementing liquid level information,
the hydrogen side of one hydrogen production system with the minimum water supplementing liquid level information is the hydrogen side of the other hydrogen production system, so that the hydrogen sides of the hydrogen production systems needing water supplementing are supplemented simultaneously, a third valve corresponding to a water conveying pipeline is opened to supplement water, the water supplementing liquid level information is raised to a set water supplementing liquid level threshold value, and the corresponding third valve is closed until the water supplementing liquid level information of the hydrogen sides of all the hydrogen production systems needing water supplementing is raised to the water supplementing liquid level threshold value, and the hydrogen side water supplementing is completed;
and the side with the minimum water replenishing liquid level information is the oxygen side of one hydrogen production system, so that the oxygen sides of the hydrogen production systems needing water replenishing are simultaneously replenished, the fourth valve corresponding to the water conveying pipeline is opened to replenish water, the water replenishing liquid level information is raised to the set water replenishing liquid level threshold value, and the corresponding fourth valve is closed until the water replenishing liquid level information of the oxygen sides of all the hydrogen production systems needing water replenishing is raised to the water replenishing liquid level threshold value, and the water replenishing of the oxygen sides is completed.
The technical scheme of the application has the following advantages:
the water supplementing device for the water electrolysis hydrogen production system can effectively save the use quantity of pumps through the one-to-many design concept, save the equipment cost, simultaneously effectively avoid the problem that the whole water supplementing device cannot be used due to the problem of single pump pumping by using a one-to-one pump design scheme, and ensure the normal use of the pumps when the water supplementing at the later stage is abnormal due to the fact that the parallel pressure stabilizing valve is arranged in the pumping loop. In addition, the liquid levels of the hydrogen separator and the oxygen separator are detected and judged through the logic control of the control system, raw material water is supplemented to the scrubbers, and the scrubbers automatically overflow to the separators to complete water supplementing, so that the safe and stable operation of the hydrogen production system is ensured; in addition, the independent water supplementing of the hydrogen separator and the oxygen separator can be effectively realized through the logic control of the control system, the risk of hydrogen-oxygen mixing is avoided, and the safety and the stability of the operation of the water supplementing device and the hydrogen production system are improved.
The water supplementing method realizes independent water supplementing of the hydrogen side and the oxygen side of the hydrogen production system, effectively avoids the mixing of hydrogen and oxygen on the hydrogen side and the oxygen side in the water supplementing process, simultaneously meets the requirement of independent water supplementing of the hydrogen side and the oxygen side of a plurality of hydrogen production systems, meets the requirement of separating hydrogen from oxygen, ensures safety and greatly improves the water supplementing efficiency.
Drawings
FIG. 1 is a block diagram of a water replenishment device for a water electrolysis hydrogen production system of the present application;
wherein: 1. the device comprises a first valve, 2, a liquid level meter, 3, a water tank, 4, a blow-down valve, 5, a pressure stabilizing valve, 6, a pressure transmitter, 7, a pressure meter, 8, a flowmeter, 9, a first filter, 10, a first water supplementing pump, 11, a first check valve, 12, a third valve, 13, a fourth valve, 14, a fifth valve, 15, a second valve, 16, a first ball valve, 17 and a second ball valve.
Detailed Description
The following describes in further detail the embodiments of the present application with reference to the drawings and examples. The following examples are illustrative of the application and are not intended to limit the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, a water replenishing device for a water electrolysis hydrogen production system of the present application includes a water supply line, a water outlet line, and at least one water delivery line; the water outlet pipeline comprises an input pipeline and an output pipeline which are connected;
at least one water tank is arranged between the water supply pipeline and the input pipeline, and a plurality of water tanks are arranged between the water supply pipeline and the input pipeline in parallel; the water inlet of the water tank 3 is connected with a water supply pipeline, and a first valve 1 is arranged between the water inlet and the water supply pipeline; each water tank is also provided with a fifth valve 14 which is arranged in parallel with the first valve and is positioned between the water supply pipeline and the input pipeline;
the water outlet of the water tank is connected with an input pipeline, and a second valve 15 is arranged between the water outlet and the input pipeline; the output pipeline is provided with at least one water supply interface, and a plurality of water delivery pipelines are correspondingly connected with a plurality of water supply interfaces of the output pipeline; the output ends of the water delivery pipelines are respectively connected with a plurality of water electrolysis hydrogen production systems for supplementing water of the water electrolysis hydrogen production systems;
the water delivery pipeline comprises a hydrogen side water supplementing pipeline and an oxygen side water supplementing pipeline which are arranged in parallel, a water supplementing outlet of the hydrogen side water supplementing pipeline is sequentially provided with a first check valve 11 and a third valve 12, and the third valve is connected with a hydrogen separator or a hydrogen scrubber of the water electrolysis hydrogen production system; the water supplementing outlet of the oxygen side water supplementing pipeline is sequentially provided with a first check valve and a fourth valve 13, and the fourth valve is connected with an oxygen separator or an oxygen scrubber of the water electrolysis hydrogen production system.
The water replenishing device also comprises a pumping unit, wherein the pumping unit comprises a first pumping loop and a second pumping loop; the first pumping loop is arranged on the output pipeline and is positioned at the front end of the water supply interface; the first pumping circuit comprises a first ball valve 16, a first filter 9, a first water supplementing pump 10, a first check valve 11 and a second ball valve 17 which are sequentially arranged; the second pumping circuit is arranged in parallel with the first pumping circuit, and comprises a third ball valve, a second filter, a second water supplementing pump, a second check valve and a fourth ball valve which are sequentially arranged.
The water supplementing device also comprises a pressure stabilizing loop, wherein the pressure stabilizing loop comprises a pressure stabilizing valve 5; the pressure stabilizing valve is arranged in parallel with the pumping unit and used for stabilizing the pressure of the first pumping loop and/or the second pumping loop.
In this embodiment, the first valve, the third valve and the fourth valve are preferably water supplementing valves; the second valve 15 is an electromagnetic ball valve, and the fifth valve is a manual ball valve; the first ball valve, the second ball valve, the third ball valve and the fourth ball valve are partition ball valves, and electromagnetic ball valves are preferred.
Raw water enters respective raw water tanks through water supplementing solenoid valves, the raw water tanks are provided with liquid level detection units and control the starting and stopping of the water supplementing solenoid valves, a bypass of the water supplementing solenoid valves is provided with a manual water supplementing ball valve, the raw water tanks are provided with drain outlets and water outlets, and the outlets of the water tanks are combined and then connected with inlets of water supplementing pumps of pumping devices; the inlet of the water supplementing pump is provided with a partition ball valve and a filter, so that the maintenance is convenient, impurities in water are filtered, the outlet of the water supplementing pump is provided with a check valve and a partition ball valve, the water or gas of other units is prevented from returning to the outlet of the pump, meanwhile, a self-operated pressure stabilizing valve is arranged in parallel in a loop of the water supplementing pump, and when the pressure of the outlet of the pump is too high, the reflux setting of the water supplementing pump is realized by adjusting the bypass pressure stabilizing valve; the device adopts a mode that a double pump loop (a first pumping loop and a second pumping loop) is used for one standby.
The output pipeline between the pumping unit and the water supply interface is provided with a pressure monitoring unit and/or a flow monitoring unit, the pressure monitoring unit is used for monitoring the pressure of the output pipeline, and the flow monitoring unit is used for detecting the flow of the output pipeline. Each water tank is provided with a liquid level meter 2 which is used for monitoring the liquid level of the water tank; the bottom of the water tank is provided with a drain outlet, the drain outlet is connected with a drain valve 4, and the drain valve is a manual ball valve or an electromagnetic ball valve. Preferably, the pressure monitoring unit comprises a pressure transmitter 6 and a pressure gauge 7 arranged in parallel; the flow monitoring unit comprises a flow meter 8.
A flowmeter and a pressure transmitter are arranged on the main pipeline, and whether the main pipeline is abnormal or not is judged by pressure, and a low flow alarm is set; the plurality of water delivery pipelines are respectively connected with different hydrogen production systems, and check valves and pneumatic ball valves are respectively arranged on the hydrogen side water supplementing pipeline and the oxygen side water supplementing pipeline of the hydrogen separator and the oxygen separator to prevent water from flowing back; the water is supplemented to the scrubber preferentially in the water supplementing process, and the water supplementing on the hydrogen side and the oxygen side is realized in a control logic mode, so that the mixing of the hydrogen and the oxygen is effectively avoided.
The application also provides a water supplementing method for the water electrolysis hydrogen production system, which comprises the water supplementing device for the water electrolysis hydrogen production system, and comprises the following steps of:
the method comprises the steps of setting a water supplementing liquid level threshold of each hydrogen production system, obtaining water supplementing liquid level information of each hydrogen production system, and controlling and executing corresponding water supplementing operation according to the water supplementing liquid level information of each hydrogen production system; the method specifically comprises the following steps:
the current water supplementing liquid level information of the hydrogen production systems is larger than the set water supplementing liquid level threshold value, which means that the hydrogen production systems are in a full state and water supplementing is not needed, and at the moment, the third valve and the fourth valve of each water conveying pipeline are not opened;
in the plurality of hydrogen production systems, if the current water supplementing liquid level information of one hydrogen production system is smaller than a set water supplementing liquid level threshold value, a third valve or a fourth valve of a water conveying pipeline of the hydrogen production system is opened, and after the hydrogen side and the oxygen side of the hydrogen production system are subjected to independent water supplementing, the hydrogen side of the hydrogen production system is subjected to independent water supplementing, or the oxygen side of the hydrogen production system is subjected to independent water supplementing, and then the hydrogen side is subjected to independent water supplementing; the water replenishing completion judgment is that the water replenishing liquid level information rises to a set water replenishing liquid level threshold value;
in the hydrogen production systems, the current water supplementing liquid level information of the hydrogen production systems does not reach the set water supplementing liquid level threshold value, the water supplementing is preferentially carried out on the side with the minimum water supplementing liquid level information,
the hydrogen side of one hydrogen production system with the minimum water supplementing liquid level information is the hydrogen side of the other hydrogen production system, so that the hydrogen sides of the hydrogen production systems needing water supplementing are supplemented simultaneously, a third valve corresponding to a water conveying pipeline is opened to supplement water, the water supplementing liquid level information is raised to a set water supplementing liquid level threshold value, and the corresponding third valve is closed until the water supplementing liquid level information of the hydrogen sides of all the hydrogen production systems needing water supplementing is raised to the water supplementing liquid level threshold value, and the hydrogen side water supplementing is completed;
and the side with the minimum water replenishing liquid level information is the oxygen side of one hydrogen production system, so that the oxygen sides of the hydrogen production systems needing water replenishing are simultaneously replenished, the fourth valve corresponding to the water conveying pipeline is opened to replenish water, the water replenishing liquid level information is raised to the set water replenishing liquid level threshold value, and the corresponding fourth valve is closed until the water replenishing liquid level information of the oxygen sides of all the hydrogen production systems needing water replenishing is raised to the water replenishing liquid level threshold value, and the water replenishing of the oxygen sides is completed.
The specific water supplementing application of the scheme comprises the following steps:
the method comprises the steps of adopting a 1# to N # raw material water tank, configuring according to the scale of a hydrogen production system, and adopting two pumping loops which are used for one and are prepared for a pumping device; two water supplementing pumps are provided for 01 to i sets of hydrogen production system equipment to supplement water.
4 x 1000 cubic hydrogen production equipment is needed, 4 sets of hydrogen production systems with the working pressure of 2.0MPa and 2 sets of raw material water tanks with the volume of 10 cubic are arranged, and according to a chemical reaction formula, 2H2 O= = = 2H2 ++O2 ≡ (electrifying); the generation of 1m3 of hydrogen requires the consumption of about 1L of water; therefore, the maximum water supplementing amount required by 4 sets of 1000m3/h equipment is 4m3/h, the water supplementing pump is selected to be not less than 6m3/h,
when a set of separators is fed with water separately, taking the size of an actual container as an example, the required amount of water fed from a low liquid level to a high liquid level of the device is about 1m each time 3 The maximum effective water supplementing flow is 5m 3 And/h (pump output flow is 6m3/h, water consumption in the water replenishing process is 1m3/h, and the difference is taken), so that the water replenishing time is about 1/5×60=12 minutes (calculated according to 10 minutes).
According to the characteristic curve of the pump, a bypass pressure stabilizing valve of DN20 is selected, and the diameter is selected to ensure that the maximum reflux flow can circulate and the minimum flow of the pump operation is ensured.
When 4 sets of systems are supplemented with water at the same time, the system requirement is about 3.5m 3 Maximum water supplementing 2m 3 And/h, thus the water replenishment time is about 1.75h, during which the system can continue to operate steadily.
The time method comprises the following steps:
according to the gas yield ratio of the system, 2H2 O= = = = 2H2 ++O2 +.in the water electrolysis process, the yield of hydrogen is twice that of oxygen, the same liquid (containing the alkaline liquid with teaching, needing to be washed out in a scrubber) is considered here, so the water supplementing times of the hydrogen and oxygen separators are calculated according to 2:1 (the water supplementing ratio is not less than the ratio), and the water supplementing time and the water supplementing amount of each set of equipment are different in consideration of different operation conditions of the equipment; the water make-up logic is set as follows:
according to the calculation result, when considering the time of water replenishment on the hydrogen side and the oxygen side respectively, the single time period should be not less than 2*3 =6h (when water replenishment is performed simultaneously, the single water replenishment time is longest, about 1.75h is considered here as 2h, and hydrogen is replenished 2 times simultaneously and oxygen is replenished 1 time simultaneously in 1 cycle); taking a 24 hour day as an example, water replenishment is performed during a 4p+2 hour period.
Examples:
0 to 6 points are one period, 0 to 4 points are water supplementing at the hydrogen side, and 5 to 6 points are water supplementing at the oxygen side;
6 to 12 points are one period, 7 to 10 points are hydrogen side water supplementing and 11 to 12 points are oxygen side water supplementing; the following increases in order.
Separately supplementing water to the hydrogen side and the oxygen side in respective time periods; only the water supplementing of the hydrogen separator or the oxygen separator is carried out, and each pneumatic valve is set to be in an interlocking state, so that only one valve is ensured to act. And in addition, the lowest liquid level of 01-i gas-liquid processors is judged, and water is supplemented from the lowest liquid level. And the liquid level difference values of different gas-liquid processor units can be set for water supplementing.
The number of times method is as follows:
according to the gas production ratio of the system, the water supplementing times of the hydrogen and oxygen separators are calculated according to 2:1, and the water supplementing time and water supplementing amount of each set of equipment are different in consideration of different operation conditions of the equipment, and the water supplementing logic is set as follows:
and each operation unit judges the water supplementing requirement simultaneously, and when the ith set of equipment needs water supplementing, the water supplementing hydrogen and oxygen side requirements are firstly judged, and 2i pneumatic valves are added in the system.
Preferably, when the single set of equipment needs to be replenished, only one valve (the third valve or the fourth valve corresponding to the set of equipment) is opened, and the rest valves are interlocked.
When the 2 nd set or the rest needs to be supplemented with water, if the water supplement is consistent, the same side water supplement can be started at the same time, and the water supplement of the last stage is ended as the judgment time.
Examples: the system adds water for 1 time on the oxygen side after adding water for 2 times on the hydrogen side of each system, when only a single system adds water, the 1# equipment adds water, and the lowest liquid level water adding device i# is judged through the liquid level, and meanwhile, each system separately counts to judge the water adding direction.
Examples: and 4 sets of systems are added in total, after each set of system supplements water for 2 times of hydrogen sides, the oxygen side supplements water for 1 time, when the 1# equipment supplements water for the hydrogen sides, if the 2# equipment judges that the water supplementing hydrogen sides are needed, the water supplementing valve is simultaneously opened, if the 2# equipment judges that the oxygen supplementing sides are needed, the 1# water supplementing is waited to be completed, and the same is carried out, and the equipment is judged in sequence, thereby the lowest water level equipment is supplemented with priority.
Liquid level method:
according to the gas production ratio of the system, the water supplementing times of the hydrogen and oxygen separators are calculated according to 2:1, and the water supplementing time and water supplementing amount of each set of equipment are different in consideration of different operation conditions of the equipment, and the water supplementing logic is set as follows:
and each operation unit judges the water supplementing requirement at the same time, and carries out graded water supplementing on the liquid level of the hydrogen separator and the oxygen separator.
According to calculation, the longest time of single water replenishing is 1.75h, in order to further improve the safety of the system (avoid that the water replenishing time of a single device is too long to cause the liquid level to be too low), the water replenishing liquid level can be divided into 4 grades (between the water replenishing low liquid level and the water replenishing high liquid level), and when the water replenishing minimum liquid level is 3/4, the water replenishing pump is started in advance to replenish water.
Preferably, when a plurality of water replenishing devices are required at the same time, when the water replenishing sides are consistent, the water replenishing devices on the same side can be started;
when the equipment is normally stopped, water is supplemented into the separator to the upper limit liquid level, so that the separator is in a safe liquid level state.
The water supplementing method realizes independent water supplementing of the hydrogen side and the oxygen side of the hydrogen production system, effectively avoids the mixing of hydrogen and oxygen on the hydrogen side and the oxygen side in the water supplementing process, simultaneously meets the requirement of independent water supplementing of the hydrogen side and the oxygen side of a plurality of hydrogen production systems, meets the requirement of separating hydrogen from oxygen, ensures safety and greatly improves the water supplementing efficiency.
It should be noted that the water replenishing device of the present application further includes a controller, the controller includes a control system, and the controller is connected with the valve, the pressure monitoring unit, the flowmeter, the liquid level meter and the water replenishing pump related to the present application, and the control system is conventionally arranged with reference to the prior art to control the operation of the whole water replenishing device for the water electrolysis hydrogen production system.
The foregoing is merely a preferred embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the application.
Claims (8)
1. The water replenishing device for the water electrolysis hydrogen production system is characterized by comprising a water supply pipeline, a water outlet pipeline and at least one water delivery pipeline; the water outlet pipeline comprises an input pipeline and an output pipeline which are connected;
at least one water tank is arranged between the water supply pipeline and the input pipeline, and a plurality of water tanks are arranged between the water supply pipeline and the input pipeline in parallel; the water inlet of the water tank is connected with a water supply pipeline, and a first valve is arranged between the water inlet and the water supply pipeline;
the water outlet of the water tank is connected with an input pipeline, and a second valve is arranged between the water outlet and the input pipeline; the output pipeline is provided with at least one water supply interface, and a plurality of water delivery pipelines are correspondingly connected with a plurality of water supply interfaces of the output pipeline; the output ends of the water delivery pipelines are respectively connected with a plurality of water electrolysis hydrogen production systems for supplementing water of the water electrolysis hydrogen production systems;
the water delivery pipeline comprises a hydrogen side water supplementing pipeline and an oxygen side water supplementing pipeline which are arranged in parallel, a water supplementing outlet of the hydrogen side water supplementing pipeline is provided with a third valve, and the third valve is connected with a hydrogen separator or a hydrogen scrubber of the water electrolysis hydrogen production system; the water supplementing outlet of the oxygen side water supplementing pipeline is provided with a fourth valve which is connected with an oxygen separator or an oxygen scrubber of the water electrolysis hydrogen production system;
the device comprises a pumping unit, wherein the pumping unit comprises a first pumping loop which is arranged on an output pipeline and is positioned at the front end of a water supply interface; the first pumping circuit comprises a first ball valve, a first filter, a first water supplementing pump, a first check valve and a second ball valve which are sequentially arranged;
the pumping unit comprises a second pumping circuit; the second pumping circuit is arranged in parallel with the first pumping circuit, and comprises a third ball valve, a second filter, a second water supplementing pump, a second check valve and a fourth ball valve which are sequentially arranged.
2. The water replenishing device for a hydro-electrolytic hydrogen production system of claim 1, comprising a pressure stabilizing circuit comprising a pressure stabilizing valve; the pressure stabilizing valve is arranged in parallel with the pumping unit and used for stabilizing the pressure of the first pumping loop and/or the second pumping loop.
3. The water replenishing device for the water electrolysis hydrogen production system according to claim 2, wherein a pressure monitoring unit and/or a flow monitoring unit is/are arranged on the output pipeline between the pumping unit and the water supply interface, the pressure monitoring unit is used for monitoring the pressure of the output pipeline, and the flow monitoring unit is used for detecting the flow of the output pipeline.
4. A water replenishing device for a hydro-electrolytic hydrogen production system as recited in claim 3, wherein the pressure monitoring unit comprises a pressure transmitter and a pressure gauge arranged in parallel; the flow monitoring unit includes a flow meter.
5. A water replenishing device for a water electrolysis hydrogen production system as claimed in any one of claims 1 to 4 wherein each water tank is provided with a level gauge for monitoring the water level of the water tank.
6. A water replenishing device for a water electrolysis hydrogen production system as in claim 5 wherein each water tank is further provided with a fifth valve, the fifth valve being disposed in parallel with the first valve, the fifth valve being located between the water supply line and the input line; the third valve and the fourth valve of the multiple water delivery lines are interlocked.
7. A water replenishing method for a water electrolysis hydrogen production system, comprising the water replenishing device for a water electrolysis hydrogen production system as claimed in any one of claims 1 to 6, characterized by comprising the steps of:
setting a water supplementing liquid level threshold of the hydrogen production system; and acquiring the water supplementing liquid level information of each hydrogen production system, and controlling and executing corresponding water supplementing operation according to the water supplementing liquid level information of each hydrogen production system.
8. The water replenishing method of the water replenishing device for the water electrolysis hydrogen production system according to claim 7, wherein the water replenishing liquid level threshold value of the hydrogen production system is set, water replenishing liquid level information of each hydrogen production system is obtained, and corresponding water replenishing operation is controlled and executed according to the water replenishing liquid level information of each hydrogen production system; the method specifically comprises the following steps:
the current water supplementing liquid level information of the hydrogen production systems is larger than the set water supplementing liquid level threshold value, which means that the hydrogen production systems are in a full state and water supplementing is not needed, and at the moment, the third valve and the fourth valve of each water conveying pipeline are not opened;
in the plurality of hydrogen production systems, if the current water supplementing liquid level information of one hydrogen production system is smaller than a set water supplementing liquid level threshold value, a third valve or a fourth valve of a water conveying pipeline of the hydrogen production system is opened, and after the hydrogen side and the oxygen side of the hydrogen production system are subjected to independent water supplementing, the hydrogen side of the hydrogen production system is subjected to independent water supplementing, or the oxygen side of the hydrogen production system is subjected to independent water supplementing, and then the hydrogen side is subjected to independent water supplementing; the water replenishing completion judgment is that the water replenishing liquid level information rises to a set water replenishing liquid level threshold value;
in the hydrogen production systems, the current water supplementing liquid level information of the hydrogen production systems does not reach the set water supplementing liquid level threshold value, the water supplementing is preferentially carried out on the side with the minimum water supplementing liquid level information,
the hydrogen side of one hydrogen production system with the minimum water supplementing liquid level information is the hydrogen side of the other hydrogen production system, so that the hydrogen sides of the hydrogen production systems needing water supplementing are supplemented simultaneously, a third valve corresponding to a water conveying pipeline is opened to supplement water, the water supplementing liquid level information is raised to a set water supplementing liquid level threshold value, and the corresponding third valve is closed until the water supplementing liquid level information of the hydrogen sides of all the hydrogen production systems needing water supplementing is raised to the water supplementing liquid level threshold value, and the hydrogen side water supplementing is completed;
and the side with the minimum water replenishing liquid level information is the oxygen side of one hydrogen production system, so that the oxygen sides of the hydrogen production systems needing water replenishing are simultaneously replenished, the fourth valve corresponding to the water conveying pipeline is opened to replenish water, the water replenishing liquid level information is raised to the set water replenishing liquid level threshold value, and the corresponding fourth valve is closed until the water replenishing liquid level information of the oxygen sides of all the hydrogen production systems needing water replenishing is raised to the water replenishing liquid level threshold value, and the water replenishing of the oxygen sides is completed.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2851278Y (en) * | 2005-09-28 | 2006-12-27 | 中国船舶重工集团公司第七一八研究所 | Water filling device for use in water electrolysis |
| CN201183827Y (en) * | 2008-02-18 | 2009-01-21 | 扬州中联动力科技有限公司 | Water replenishing apparatus of water electrolytic hydrogen production system |
| CN212983077U (en) * | 2020-08-20 | 2021-04-16 | 北京海珀尔氢能科技有限公司 | Water electrolysis water replenishing control device |
| CN113373458A (en) * | 2021-06-17 | 2021-09-10 | 全球能源互联网研究院有限公司 | System and method for producing hydrogen by electrolyzing water through proton exchange membrane under condition of fluctuating power input |
| CN113430536A (en) * | 2021-07-16 | 2021-09-24 | 阳光电源股份有限公司 | Water electrolysis hydrogen production system |
| CN113584526A (en) * | 2021-08-30 | 2021-11-02 | 中国科学院上海应用物理研究所 | Universal water electrolysis hydrogen production test system and test method capable of being used in multiple stacks |
-
2022
- 2022-03-15 CN CN202210254113.9A patent/CN114657602B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2851278Y (en) * | 2005-09-28 | 2006-12-27 | 中国船舶重工集团公司第七一八研究所 | Water filling device for use in water electrolysis |
| CN201183827Y (en) * | 2008-02-18 | 2009-01-21 | 扬州中联动力科技有限公司 | Water replenishing apparatus of water electrolytic hydrogen production system |
| CN212983077U (en) * | 2020-08-20 | 2021-04-16 | 北京海珀尔氢能科技有限公司 | Water electrolysis water replenishing control device |
| CN113373458A (en) * | 2021-06-17 | 2021-09-10 | 全球能源互联网研究院有限公司 | System and method for producing hydrogen by electrolyzing water through proton exchange membrane under condition of fluctuating power input |
| CN113430536A (en) * | 2021-07-16 | 2021-09-24 | 阳光电源股份有限公司 | Water electrolysis hydrogen production system |
| CN113584526A (en) * | 2021-08-30 | 2021-11-02 | 中国科学院上海应用物理研究所 | Universal water electrolysis hydrogen production test system and test method capable of being used in multiple stacks |
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