CN220413535U - Alkaline water electrolysis hydrogen production system - Google Patents
Alkaline water electrolysis hydrogen production system Download PDFInfo
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- CN220413535U CN220413535U CN202321696680.6U CN202321696680U CN220413535U CN 220413535 U CN220413535 U CN 220413535U CN 202321696680 U CN202321696680 U CN 202321696680U CN 220413535 U CN220413535 U CN 220413535U
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- pipeline
- hydrogen
- oxygen
- alkali liquor
- flow
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 169
- 239000001257 hydrogen Substances 0.000 title claims abstract description 168
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 168
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 145
- 239000001301 oxygen Substances 0.000 claims abstract description 145
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 145
- 239000007788 liquid Substances 0.000 claims abstract description 78
- 239000003513 alkali Substances 0.000 claims abstract description 68
- 238000000926 separation method Methods 0.000 claims abstract description 45
- 230000001105 regulatory effect Effects 0.000 claims abstract description 44
- 238000010992 reflux Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 70
- 238000001514 detection method Methods 0.000 claims description 16
- 230000001276 controlling effect Effects 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 description 11
- 239000012670 alkaline solution Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The present disclosure provides an alkaline water electrolysis hydrogen production system, comprising an electrolytic tank, a hydrogen gas-liquid separation unit and an oxygen gas-liquid separation unit; the liquid outlet of the hydrogen gas-liquid separation unit is connected with a first pipeline, the liquid outlet of the oxygen gas-liquid separation unit is connected with a second pipeline, the first pipeline and the second pipeline are converged to an alkali liquor reflux pipeline, and the alkali liquor reflux pipeline is connected with an oxygen side pipeline and a hydrogen side pipeline which are connected in parallel; the hydrogen side pipeline is connected to the hydrogen side alkali liquor flow channel inlet of the electrolytic cell, and the oxygen side pipeline is connected to the oxygen side alkali liquor flow channel inlet of the electrolytic cell; the hydrogen side pipeline and the oxygen side pipeline are respectively provided with a flowmeter and a flow regulating device. The system can respectively control the flow of the inlets at the two sides of the hydrogen and oxygen of the electrolytic tank, can ensure that the concentration of the alkali liquor at the inlets at the two sides of the hydrogen and oxygen of the electrolytic tank is kept consistent, and can provide different control options for alkali liquor circulation strategies under different working conditions.
Description
Technical Field
The application relates to the field of alkaline water electrolysis hydrogen production, in particular to an alkaline water electrolysis hydrogen production system.
Background
In the prior art, the electrolyte circulation mode of the alkaline water electrolysis hydrogen production system mainly comprises two modes, wherein the first mode is to combine the electrolytes of the hydrogen side separator and the oxygen side separator and then return the electrolytes to the electrolytic tank through an inlet at the end part of the electrolytic tank, and then simultaneously distribute the electrolytes to the cathode side and the anode side of each electrolytic cell. Another way is to return the electrolyte in the hydrogen side separator to the cathode side of each cell of the electrolytic cell and the electrolyte in the oxygen side separator to the anode side of each cell of the electrolytic cell, which causes variations in the electrolyte concentrations on the cathode side and the anode side after a long period of operation, and therefore, it is necessary to additionally provide an electrolyte circulation tank to partially exchange the electrolytes on the cathode side and the anode side.
Disclosure of Invention
The utility model aims to provide an alkaline water electrolysis hydrogen production system so as to realize the respective control of the flow of inlets on both sides of the hydrogen and oxygen of an electrolytic tank.
In order to achieve the above object, the present disclosure provides an alkaline water electrolysis hydrogen production system including an electrolysis cell, a hydrogen gas-liquid separation unit, and an oxygen gas-liquid separation unit; the liquid outlet of the hydrogen gas-liquid separation unit is connected with a first pipeline, the liquid outlet of the oxygen gas-liquid separation unit is connected with a second pipeline, the first pipeline and the second pipeline are converged to an alkali liquor reflux main pipeline, and the alkali liquor reflux main pipeline is connected with an oxygen side pipeline and a hydrogen side pipeline which are connected in parallel; the hydrogen side pipeline is connected to a hydrogen side alkali liquor flow channel inlet of the electrolytic tank, and the oxygen side pipeline is connected to an oxygen side alkali liquor flow channel inlet of the electrolytic tank; the hydrogen side pipeline is provided with a first flowmeter and a first flow regulating device; the oxygen side pipeline is provided with a second flowmeter and a second flow regulating device; the hydrogen side gas outlet of the electrolytic tank is connected to the hydrogen gas-liquid separation unit, and the oxygen side gas outlet of the electrolytic tank is connected to the oxygen gas-liquid separation unit.
Optionally, the system further comprises a lye cooler; the main alkali liquor reflux pipeline is connected to a feed inlet of the alkali liquor cooler, and a discharge outlet pipeline of the alkali liquor cooler is connected with an oxygen side pipeline and a hydrogen side pipeline which are connected in parallel.
Optionally, the system further comprises a control unit; the first flow regulating device is a first variable frequency pump, and the control unit receives the signal of the first flow meter and is in signal connection with the first variable frequency pump; the second flow control device is a second variable frequency pump, and the control unit receives the signal of the second flow meter and is in signal connection with the second variable frequency pump.
Optionally, the system further comprises a control unit, and a discharge port pipeline of the lye cooler is provided with a circulating pump; the first flow regulating device is a first regulating valve, and the control unit is respectively connected with the first flow meter and the first regulating valve in a signal manner and is used for receiving a first flow signal of the first flow meter and regulating the opening and closing of the first regulating valve according to the first flow signal; the second flow regulating device is a second regulating valve, and the control unit is respectively connected with the second flow meter and the second regulating valve in a signal manner and is used for receiving a second flow signal of the second flow meter and regulating the opening and closing of the second regulating valve according to the second flow signal.
Optionally, the discharge port of the lye cooler is connected with the feed inlet of a filter, and the discharge port of the filter is connected with the feed inlet of the circulating pump.
Optionally, the first regulating valve and the second regulating valve are each independently selected from one of a ball valve, a butterfly valve, a globe valve, a needle valve, a membrane regulating valve and an electric regulating valve; the circulation pump is a non-positive displacement pump.
Optionally, the first flowmeter and the second flowmeter are each independently selected from one of an area flowmeter, a volumetric flowmeter, a coriolis flowmeter, and an electromagnetic flowmeter.
Optionally, the hydrogen side pipeline is further provided with a first control valve, and the first control valve is used for controlling the circulation and the cutting-off of the hydrogen side pipeline and controlling the single-phase flow of the liquid in the hydrogen side pipeline; the oxygen side pipeline is also provided with a second control valve, and the second control valve is used for controlling the circulation and the cutting-off of the oxygen side pipeline and controlling the single-phase flow of the liquid in the oxygen side pipeline.
Optionally, the electrolytic tank comprises a positive electrode and a negative electrode, and the positive electrode and the negative electrode are respectively positioned at two ends of the electrolytic tank; the cathode end of the electrolytic tank is provided with a hydrogen side gas outlet, an oxygen side gas outlet, a hydrogen side alkali liquor flow passage inlet and an oxygen side alkali liquor flow passage inlet.
Optionally, the electrolytic cell comprises a positive electrode, a first negative electrode and a second negative electrode, wherein the positive electrode is positioned in the middle of the electrolytic cell, and the first negative electrode and the second negative electrode are respectively positioned at two ends of the electrolytic cell; the first cathode end of the electrolytic tank is provided with a first hydrogen side gas outlet, a first oxygen side gas outlet, a first hydrogen side alkali liquor flow channel inlet and a first oxygen side alkali liquor flow channel inlet, and the second cathode end of the electrolytic tank is provided with a second hydrogen side gas outlet, a second oxygen side gas outlet, a second hydrogen side alkali liquor flow channel inlet and a second oxygen side alkali liquor flow channel inlet; the hydrogen side pipeline is connected with a first hydrogen side pipeline and a second hydrogen side pipeline which are connected in parallel, and the oxygen side pipeline is connected with a first oxygen side pipeline and a second oxygen side pipeline which are connected in parallel; the first hydrogen side gas outlet and the second hydrogen side gas outlet are connected to a feed inlet pipeline of the hydrogen gas-liquid separation unit, and the first oxygen side gas outlet and the second oxygen side gas outlet are connected to a feed inlet pipeline of the oxygen gas-liquid separation unit; the first hydrogen side pipeline is connected to a first hydrogen side alkali liquor flow channel inlet of the electrolytic tank, and the second hydrogen side pipeline is connected to a second hydrogen side flow channel inlet of the electrolytic tank; the first oxygen side pipeline is connected to a first oxygen side alkali liquor flow passage inlet of the electrolytic tank, and the second oxygen side pipeline is connected to a second oxygen side alkali liquor flow passage inlet of the electrolytic tank.
Optionally, the system comprises at least two electrolytic tanks, and one end of a pipeline which is directly communicated between a hydrogen side gas outlet of each electrolytic tank and the hydrogen gas-liquid separation unit is connected with a feed inlet of the hydrogen gas-liquid separation unit after being summarized; one end of a pipeline which is directly communicated between the oxygen side gas outlet of each electrolytic tank and the oxygen gas-liquid separation unit is connected with the feed inlet of the oxygen gas-liquid separation unit after summarizing.
Optionally, a hydrogen side gas outlet temperature detection assembly is arranged on the pipeline of the hydrogen side gas outlet; and/or an oxygen side gas outlet temperature detection assembly is arranged on the pipeline of the oxygen side gas outlet; a pipeline of the hydrogen side alkali liquor flow passage inlet is provided with a hydrogen side alkali liquor flow passage inlet temperature detection assembly; and/or an oxygen side alkali liquor flow passage inlet temperature detection assembly is arranged on the pipeline of the oxygen side alkali liquor flow passage inlet.
Through the technical scheme, the alkaline water electrolysis hydrogen production system can respectively control the flow of the inlets at the two sides of the hydrogen and oxygen of the electrolytic tank, can ensure that the concentration of the alkaline solution at the inlets at the two sides of the hydrogen and oxygen of the electrolytic tank is kept consistent, and can provide different control options for alkaline solution circulation strategies under different working conditions.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a first specific embodiment of a alkaline water electrolysis hydrogen production system of the present disclosure;
FIG. 2 is a second specific embodiment of the alkaline aqueous electrolytic hydrogen production system of the present disclosure;
FIG. 3 is a third particular embodiment of the alkaline aqueous electrolytic hydrogen production system of the present disclosure;
fig. 4 is a fourth particular embodiment of an alkaline water electrolysis hydrogen production system of the present disclosure.
Description of the reference numerals
1 electrolytic tank 2 hydrogen gas-liquid separation unit
3 oxygen gas-liquid separation unit 4 lye cooler
5 control unit 6 first flowmeter
7 second flowmeter 8 first variable frequency Pump
9 second variable frequency pump 10 circulating pump
11 first regulating valve 12 second regulating valve
13 hydrogen side alkali liquor flow channel inlet 14 oxygen side alkali liquor flow channel inlet
15 Hydrogen side gas outlet 16 oxygen side gas outlet
17 first hydrogen side gas outlet 18 first oxygen side gas outlet
19 first hydrogen side lye flow channel inlet 20 first oxygen side lye flow channel inlet
21 second hydrogen side gas outlet 22 second oxygen side gas outlet
23 second hydrogen side lye flow channel inlet 24 second oxygen side lye flow channel inlet
Detailed Description
The following describes specific embodiments of the present disclosure in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
The present disclosure provides a hydrogen production system by alkaline water electrolysis, as shown in fig. 1, the system comprises an electrolytic tank 1, a hydrogen gas-liquid separation unit 2 and an oxygen gas-liquid separation unit 3; the liquid outlet of the hydrogen gas-liquid separation unit 2 is connected with a first pipeline, the liquid outlet of the oxygen gas-liquid separation unit 3 is connected with a second pipeline, the first pipeline and the second pipeline are converged to an alkali liquor reflux pipeline, and the alkali liquor reflux main pipeline is connected with an oxygen side pipeline and a hydrogen side pipeline which are connected in parallel; the hydrogen side pipeline is connected to a hydrogen side lye flow channel inlet 13 of the electrolytic tank, and the oxygen side pipeline is connected to an oxygen side lye flow channel inlet 14 of the electrolytic tank; the hydrogen side pipe is provided with a first flow meter 6 and a first flow rate adjusting device; the oxygen side pipeline is provided with a second flowmeter 7 and a second flow regulating device; the hydrogen side gas outlet 15 of the electrolyzer is connected to the hydrogen gas-liquid separation unit 2, and the oxygen side gas outlet 16 of the electrolyzer is connected to the oxygen gas-liquid separation unit 3.
The alkaline water electrolysis hydrogen production system can respectively control the flow of inlets at the two sides of the hydrogen and oxygen of the electrolytic tank, can ensure that the concentration of alkali liquor at the inlets at the two sides of the hydrogen and oxygen of the electrolytic tank is kept consistent, and can provide different control options for alkali liquor circulation strategies under different working conditions. Specifically, the first flow adjusting device and the second flow adjusting device are controlled to conduct fine adjustment, so that the flow of alkali liquor entering the hydrogen side or the oxygen side of the cell diaphragm of the electrolytic cell is manually fine adjusted, the pressure of the cathode side and the anode side of the electrolytic cell is different, and the purity of oxygen/hydrogen gas is improved.
In one embodiment of the present disclosure, the system may further comprise a lye cooler; the main alkali liquor reflux pipeline is connected to a feed inlet of the alkali liquor cooler, and a discharge outlet pipeline of the alkali liquor cooler is connected with an oxygen side pipeline and a hydrogen side pipeline which are connected in parallel.
In a specific embodiment of the present disclosure, as shown in fig. 1, the system may further comprise a control unit 5; the first flow regulating device is a first variable frequency pump 8, and the control unit 5 receives the signal of the first flowmeter 6 and is in signal connection with the first variable frequency pump 8; the second flow control device is a second variable frequency pump 9, and the control unit 5 receives the signal of the second flowmeter 7 and is in signal connection with the second variable frequency pump 9. In this embodiment, the variable frequency pump, the flowmeter and the control unit are electrically connected, and the flowmeter in the present disclosure is used for detecting the electrolyte flow rate of the water electrolysis hydrogen production system, and sending to the control unit, and feeding back to the control unit according to the input voltage and current, the gas purity data, and controlling the rotation speed of the variable frequency pump by the control unit, so as to adjust the flow rates of the cathode side and the anode side.
In another specific embodiment of the disclosure, as shown in fig. 2, the system further comprises a control unit, and a discharge port pipeline of the lye cooler is provided with a circulating pump 10; the first flow rate adjusting device is a first adjusting valve 11, and the control unit is respectively connected with the first flow rate meter 6 and the first adjusting valve 11 in a signal manner and is used for receiving a first flow rate signal of the first flow rate meter 6 and adjusting the opening and closing of the first adjusting valve 11 according to the first flow rate signal; the second flow rate adjusting device is a second adjusting valve 12, and the control unit is respectively connected with the second flow rate meter 7 and the second adjusting valve 12 in a signal manner, and is used for receiving a second flow rate signal of the second flow rate meter 7 and adjusting the opening and closing of the second adjusting valve 12 according to the second flow rate signal. In this embodiment, the regulating valve, the flow meter and the control unit are electrically connected, and the flow meter in the present disclosure is used for detecting the flow rate of the electrolyte in the water electrolysis hydrogen production system, and sending the flow rate to the control unit, and feeding back the flow rate to the control unit according to the input voltage and current and the data of gas purity, and controlling the opening of the regulating valve by the control unit so as to regulate the flow rates of the cathode side and the anode side.
According to the present disclosure, the discharge port of the lye cooler 4 may be connected with the feed port of a filter, and the discharge port of the filter is connected with the feed port of the circulation pump 10. The present disclosure filters impurities present in the lye by providing filters on the lines of the lye cooler 4 and the circulation pump 10.
According to the present disclosure, the first regulating valve 11 and the second regulating valve 12 may be well-known control valves capable of continuous control of valve opening, and by way of example, the first regulating valve 11 and the second regulating valve 12 may each be independently selected from one of ball valves, butterfly valves, globe valves, needle valves, membrane regulating valves, and electric regulating valves; the circulation pump 10 may be a non-positive displacement pump, and the circulation pump 10 may be a centrifugal pump, a turbo pump, or the like, as examples.
According to the present disclosure, the first flowmeter 6 and the second flowmeter 7 may each be independently selected from one of an area flowmeter, a volumetric flowmeter, a coriolis flowmeter, and an electromagnetic flowmeter.
According to the present disclosure, the hydrogen side pipe may further be provided with a first control valve for controlling the flow and cut-off of the hydrogen side pipe and controlling the single-phase flow of the liquid in the hydrogen side pipe; the oxygen side pipeline can be further provided with a second control valve, and the second control valve is used for controlling the circulation and the cutting-off of the oxygen side pipeline and controlling the single-phase flow of the liquid in the oxygen side pipeline. The first control valve and the second control valve may be, for example, on-off valves, shut-off valves or check valves for flow-through of a pipeline shut-off or control of single-phase flow of liquid in the event of a malfunction, start-up or shut-down. The single-phase flow of liquid in the hydrogen side pipeline and the single-phase flow of liquid in the oxygen side pipeline in the present disclosure are specifically one-way flows from the lye cooler to the electrolyzer.
In an exemplary embodiment of the present disclosure, the electrolytic cell 1 may include a positive electrode and a negative electrode, which are respectively positioned at both ends of the electrolytic cell 1; wherein, the cathode end of the electrolytic tank 1 is provided with a hydrogen side alkali liquor flow passage outlet 15, an oxygen side alkali liquor flow passage outlet 16, a hydrogen side gas inlet 13 and an oxygen side gas inlet 14.
In an exemplary embodiment of the present disclosure, as shown in fig. 3 and 4, the electrolytic cell includes a positive electrode, a first negative electrode, and a second negative electrode, where the positive electrode is located in the middle of the electrolytic cell, and the first negative electrode and the second negative electrode are located at two ends of the electrolytic cell, respectively; wherein, a first cathode end of the electrolytic tank 1 is provided with a first hydrogen side gas outlet 17, a first oxygen side gas outlet 18, a first hydrogen side alkali liquor flow passage inlet 19 and a first oxygen side alkali liquor flow passage inlet 20, and a second cathode end of the electrolytic tank 1 is provided with a second hydrogen side gas outlet 21, a second oxygen side gas outlet 22, a second hydrogen side alkali liquor flow passage inlet 23 and a second oxygen side alkali liquor flow passage inlet 24; the hydrogen side pipeline is connected with a first hydrogen side pipeline and a second hydrogen side pipeline which are connected in parallel, and the oxygen side pipeline is connected with a first oxygen side pipeline and a second oxygen side pipeline which are connected in parallel; the first hydrogen-side gas outlet 17 and the second hydrogen-side gas outlet 21 are connected to a feed inlet pipe of the hydrogen gas-liquid separation unit 2, and the first oxygen-side gas outlet 18 and the second oxygen-side gas outlet 22 are connected to a feed inlet pipe of the oxygen gas-liquid separation unit 3; the first hydrogen side pipeline is connected to a first hydrogen side lye flow channel inlet 19 of the electrolytic tank 1, and the second hydrogen side pipeline is connected to a second hydrogen side lye flow channel inlet 23 of the electrolytic tank 1; the first oxygen side pipeline is connected to a first oxygen side lye flow channel inlet 20 of the electrolytic cell 1, and the second oxygen side pipeline is connected to a second oxygen side lye flow channel inlet 24 of the electrolytic cell 1.
In a specific embodiment of the disclosure, the system may include at least two electrolytic tanks, where one end of a pipeline directly connected between the hydrogen side gas outlet of each electrolytic tank and the hydrogen gas-liquid separation unit is summarized and then connected with the feed inlet of the hydrogen gas-liquid separation unit; one end of a pipeline which is directly communicated between the oxygen side gas outlet of each electrolytic tank and the oxygen gas-liquid separation unit is connected with the feed inlet of the oxygen gas-liquid separation unit after summarizing.
According to the present disclosure, a hydrogen side gas outlet temperature detection assembly may be provided on a pipe of the hydrogen side gas outlet; and/or an oxygen side gas outlet temperature detection component can be arranged on the pipeline of the oxygen side gas outlet, and the hydrogen side temperature detection component and the oxygen side temperature detection component are used for detecting the temperature of the electrolytic tank; a pipeline of the hydrogen side alkali liquor flow passage inlet can be provided with a hydrogen side alkali liquor flow passage inlet temperature detection assembly; and/or, an oxygen side alkali liquor flow passage inlet temperature detection component can be arranged on the pipeline of the oxygen side alkali liquor flow passage inlet, and the hydrogen side temperature detection component and the oxygen side temperature detection component are used for detecting the temperature of alkali liquor.
According to the present disclosure, the hydrogen gas-liquid separation unit may further include a hydrogen-side gas-liquid separator, a hydrogen-side scrubber, and a hydrogen-side cooler, and the oxygen gas-liquid separation unit may further include an oxygen-side gas-liquid separator, an oxygen-side scrubber, and an oxygen-side cooler; the gas-liquid inlet of the hydrogen-side gas-liquid separator is connected with the hydrogen side flow outlet of the electrolytic cell unit, the gas outlet of the hydrogen-side gas-liquid separator is connected with the gas inlet of the hydrogen-side scrubber, and the gas outlet of the hydrogen-side scrubber is connected with the gas inlet of the hydrogen-side cooler; the gas-liquid inlet of the oxygen side gas-liquid separator is connected with the oxygen side flow outlet of the electrolytic cell unit, the gas outlet of the oxygen side gas-liquid separator is connected with the gas inlet of the oxygen side scrubber, and the gas outlet of the oxygen side scrubber is connected with the gas inlet of the oxygen side cooler.
According to the present disclosure, a hydrogen side liquid trap may be connected to the hydrogen side cooler, and an oxygen side liquid trap may be connected to the oxygen side cooler. The hydrogen side liquid trap and the oxygen side liquid trap of the present disclosure can further remove moisture in hydrogen and oxygen.
According to the present disclosure, in order to recover moisture in the gas-liquid separation process, the hydrogen side scrubber, the hydrogen side cooler, the hydrogen side liquid trap, the oxygen side scrubber, the oxygen side cooler, and the oxygen side liquid trap may be integrated, that is, the hydrogen side gas-liquid separator is further in communication with the washing cooling water removal integration apparatus, and the oxygen side gas-liquid separator is further in communication with the washing cooling water removal integration apparatus.
The preferred embodiments of the present disclosure have been described in detail above, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (12)
1. The alkaline water electrolysis hydrogen production system is characterized by comprising an electrolytic tank, a hydrogen gas-liquid separation unit and an oxygen gas-liquid separation unit;
the liquid outlet of the hydrogen gas-liquid separation unit is connected with a first pipeline, the liquid outlet of the oxygen gas-liquid separation unit is connected with a second pipeline, the first pipeline and the second pipeline are converged to an alkali liquor reflux main pipeline, and the alkali liquor reflux main pipeline is connected with an oxygen side pipeline and a hydrogen side pipeline which are connected in parallel; the hydrogen side pipeline is connected to a hydrogen side alkali liquor flow channel inlet of the electrolytic tank, and the oxygen side pipeline is connected to an oxygen side alkali liquor flow channel inlet of the electrolytic tank; the hydrogen side pipeline is provided with a first flowmeter and a first flow regulating device; the oxygen side pipeline is provided with a second flowmeter and a second flow regulating device;
the hydrogen side gas outlet of the electrolytic tank is connected to the hydrogen gas-liquid separation unit, and the oxygen side gas outlet of the electrolytic tank is connected to the oxygen gas-liquid separation unit.
2. The alkaline water electrolysis hydrogen production system of claim 1 further comprising an lye cooler; the main alkali liquor reflux pipeline is connected to a feed inlet of the alkali liquor cooler, and a discharge outlet pipeline of the alkali liquor cooler is connected with an oxygen side pipeline and a hydrogen side pipeline which are connected in parallel.
3. The alkaline water electrolysis hydrogen production system of claim 1 or 2, further comprising a control unit; the first flow regulating device is a first variable frequency pump, and the control unit receives the signal of the first flow meter and is in signal connection with the first variable frequency pump; the second flow regulating device is a second variable frequency pump, and the control unit receives the signal of the second flow meter and is in signal connection with the second variable frequency pump.
4. The alkaline water electrolysis hydrogen production system according to claim 2, further comprising a control unit, wherein a discharge port pipeline of the lye cooler is provided with a circulating pump; the first flow regulating device is a first regulating valve, and the control unit is respectively connected with the first flow meter and the first regulating valve in a signal manner and is used for receiving a first flow signal of the first flow meter and regulating the opening and closing of the first regulating valve according to the first flow signal; the second flow regulating device is a second regulating valve, and the control unit is respectively connected with the second flow meter and the second regulating valve in a signal manner and is used for receiving a second flow signal of the second flow meter and regulating the opening and closing of the second regulating valve according to the second flow signal.
5. The alkaline water electrolysis hydrogen production system of claim 4 wherein the outlet of the lye cooler is connected to the inlet of a filter, the outlet of the filter being connected to the inlet of the circulation pump.
6. The alkaline water electrolysis hydrogen production system of claim 4 wherein the first and second regulator valves are each independently one of a ball valve, a butterfly valve, a globe valve, a needle valve, a membrane regulator valve, and an electric regulator valve; the circulation pump is a non-positive displacement pump.
7. The alkaline water electrolysis hydrogen production system of claim 1 wherein the first flow meter and the second flow meter are each independently one selected from the group consisting of an area flow meter, a volumetric flow meter, a coriolis flow meter and an electromagnetic flow meter.
8. The alkaline water electrolysis hydrogen production system according to claim 1, wherein the hydrogen side pipeline is further provided with a first control valve for controlling the flow and cut-off of the hydrogen side pipeline and controlling the single-phase flow of the liquid in the hydrogen side pipeline; the oxygen side pipeline is also provided with a second control valve, and the second control valve is used for controlling the circulation and the cutting-off of the oxygen side pipeline and controlling the single-phase flow of the liquid in the oxygen side pipeline.
9. The alkaline water electrolysis hydrogen production system of claim 1 wherein the electrolyzer comprises a positive electrode and a negative electrode, the positive electrode and the negative electrode being located at respective ends of the electrolyzer; the cathode end of the electrolytic tank is provided with a hydrogen side gas outlet, an oxygen side gas outlet, a hydrogen side alkali liquor flow passage inlet and an oxygen side alkali liquor flow passage inlet.
10. The alkaline water electrolysis hydrogen production system of claim 1 wherein the electrolyzer comprises a positive electrode, a first negative electrode and a second negative electrode, the positive electrode being located in the middle of the electrolyzer, the first negative electrode and the second negative electrode being located at the two ends of the electrolyzer, respectively;
the first cathode end of the electrolytic tank is provided with a first hydrogen side gas outlet, a first oxygen side gas outlet, a first hydrogen side alkali liquor flow channel inlet and a first oxygen side alkali liquor flow channel inlet, and the second cathode end of the electrolytic tank is provided with a second hydrogen side gas outlet, a second oxygen side gas outlet, a second hydrogen side alkali liquor flow channel inlet and a second oxygen side alkali liquor flow channel inlet; the hydrogen side pipeline is connected with a first hydrogen side pipeline and a second hydrogen side pipeline which are connected in parallel, and the oxygen side pipeline is connected with a first oxygen side pipeline and a second oxygen side pipeline which are connected in parallel;
the first hydrogen side gas outlet and the second hydrogen side gas outlet are connected to a feed inlet pipeline of the hydrogen gas-liquid separation unit, and the first oxygen side gas outlet and the second oxygen side gas outlet are connected to a feed inlet pipeline of the oxygen gas-liquid separation unit; the first hydrogen side pipeline is connected to a first hydrogen side alkali liquor flow channel inlet of the electrolytic tank, and the second hydrogen side pipeline is connected to a second hydrogen side alkali liquor flow channel inlet of the electrolytic tank; the first oxygen side pipeline is connected to a first oxygen side alkali liquor flow passage inlet of the electrolytic tank, and the second oxygen side pipeline is connected to a second oxygen side alkali liquor flow passage inlet of the electrolytic tank.
11. The alkaline water electrolysis hydrogen production system of claim 1, wherein the system comprises at least two electrolytic cells,
one end of a pipeline which is directly communicated between the hydrogen side gas outlet of each electrolytic tank and the hydrogen gas-liquid separation unit is summarized and then connected with a feed inlet of the hydrogen gas-liquid separation unit;
one end of a pipeline which is directly communicated between the oxygen side gas outlet of each electrolytic tank and the oxygen gas-liquid separation unit is connected with the feed inlet of the oxygen gas-liquid separation unit after summarizing.
12. The alkaline water electrolysis hydrogen production system according to claim 1, wherein a hydrogen side gas outlet temperature detection assembly is provided on a pipeline of the hydrogen side gas outlet; and/or an oxygen side gas outlet temperature detection assembly is arranged on the pipeline of the oxygen side gas outlet;
a pipeline of the hydrogen side alkali liquor flow passage inlet is provided with a hydrogen side alkali liquor flow passage inlet temperature detection assembly; and/or an oxygen side alkali liquor flow passage inlet temperature detection assembly is arranged on the pipeline of the oxygen side alkali liquor flow passage inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321696680.6U CN220413535U (en) | 2023-06-30 | 2023-06-30 | Alkaline water electrolysis hydrogen production system |
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| CN202321696680.6U CN220413535U (en) | 2023-06-30 | 2023-06-30 | Alkaline water electrolysis hydrogen production system |
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| CN202321696680.6U Active CN220413535U (en) | 2023-06-30 | 2023-06-30 | Alkaline water electrolysis hydrogen production system |
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2023
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