CN218232591U - Alkaline water electrolysis hydrogen production system - Google Patents
Alkaline water electrolysis hydrogen production system Download PDFInfo
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- CN218232591U CN218232591U CN202222804250.3U CN202222804250U CN218232591U CN 218232591 U CN218232591 U CN 218232591U CN 202222804250 U CN202222804250 U CN 202222804250U CN 218232591 U CN218232591 U CN 218232591U
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- 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 application provides an alkaline water electrolysis hydrogen production system, wherein an oxygen scrubber cleans oxygen and a hydrogen scrubber cleans hydrogen, liquid and alkali carried by the oxygen and the hydrogen form alkali liquor, the cleaned oxygen and the hydrogen respectively pass through a second gas-liquid separator and a fourth gas-liquid separator, and the alkali liquor is separated from the oxygen and the hydrogen and is respectively stored in the second gas-liquid separator and the fourth gas-liquid separator; and the alkali liquor in the second gas-liquid separator and the fourth gas-liquid separator is respectively stored in the first water drainer and the second water drainer, after the alkali liquor in the first water drainer and the second water drainer reaches the preset volume, the alkali liquor in the first water drainer and the second water drainer is all discharged into the liquid supplementing box assembly, when the alkali liquor needs to be supplemented in the electrolytic bath, the alkali liquor in the liquid supplementing box assembly is supplemented into the electrolytic bath by the liquid supplementing pump assembly, so that the collection and utilization of waste water are realized, and the loss of the alkali liquor amount is reduced.
Description
Technical Field
The application relates to the technical field of electrolytic hydrogen production, in particular to an alkaline water electrolysis hydrogen production system.
Background
Hydrogen is used as industrial raw material gas, has rich application in chemical industry, and mainly has three mature technical routes from the source; firstly, hydrogen is produced by reforming fossil energy; second, hydrogen is produced as a by-product in industry; thirdly, electrolyzing water to produce hydrogen. In the process of hydrogen production by water electrolysis, the most mature technical route at present is an alkaline water electrolysis technology. In the existing water electrolysis hydrogen production, an oxygen gas-water separator and a hydrogen gas-water separator in a hydrogen production separation system can produce pollution discharge, and meanwhile, a drying part in a purification system can also produce pollution discharge in the working process. The waste liquid produced by these waste discharge processes is alkaline and carries a pollution risk if not properly treated.
SUMMERY OF THE UTILITY MODEL
To solve one of the above problems, the present application provides an alkaline water electrolysis hydrogen production system, comprising: an electrolysis cell for electrolyzing water to generate oxygen to be treated and hydrogen to be treated; the oxygen treatment assembly is communicated with the electrolytic bath and is configured to purify oxygen, the oxygen treatment assembly comprises a first gas-liquid separator, an oxygen scrubber, an oxygen cooler, a second gas-liquid separator and a first water discharger which are sequentially communicated, and an oxygen discharge assembly is arranged on the second gas-liquid separator; the hydrogen treatment assembly is communicated with the electrolytic bath and is configured to purify hydrogen, the hydrogen treatment assembly comprises a third gas-liquid separator, a hydrogen scrubber, a hydrogen cooler, a fourth gas-liquid separator and a second water drainer which are sequentially communicated, and a hydrogen discharge assembly is arranged on the fourth gas-liquid separator; the liquid supplementing tank assembly is respectively communicated with the first water drainer and the second water drainer and is configured to collect liquid in the first water drainer and the second water drainer; and the liquid replenishing pump assembly is respectively communicated with the liquid replenishing tank assembly and the electrolytic cell and is configured to discharge liquid in the liquid replenishing tank assembly so as to replenish the liquid in the electrolytic cell.
The system for producing hydrogen by alkaline water electrolysis as described above, wherein, the alkaline water electrolysis hydrogen production system also comprises a liquid circulation component; the liquid circulation assembly includes: the alkali liquor circulating pump is respectively communicated with the liquid outlet of the first gas-liquid separator and the liquid outlet of the third gas-liquid separator; the alkali liquor cooler is respectively communicated with the alkali liquor circulating pump and the electrolytic bath; the fluid infusion pump assembly is in communication with the first gas-liquid separator and/or the third gas-liquid separator.
The alkaline water electrolysis hydrogen production system as described above, wherein the liquid replenishing tank assembly comprises: a first tank in communication with the first drain, the first tank configured to collect liquid within the first drain; and a second tank communicating with the second drain, the second tank being configured to collect liquid within the second drain; the fluid replacement pump assembly comprises: a first liquid pump that is respectively communicated with the first tank and the first gas-liquid separator, the first liquid pump being configured to discharge liquid in the first tank; and a second liquid pump that is communicated with the second tank and the second gas-liquid separator, respectively, the second liquid pump being configured to discharge liquid in the second tank.
The alkaline water electrolysis hydrogen production system comprises an electrolytic bath, a first gas-liquid separator, a second recovery pipe and a second recovery pipe, wherein the first gas-liquid separator is communicated with the second gas-liquid separator through the second recovery pipe; or the liquid supplementing pump assembly is communicated with the second gas-liquid separator through a second recovery pipe, and the second recovery pipe is coiled on a pipeline between the electrolytic tank and the second gas-liquid separator.
The alkaline water electrolysis hydrogen production system as described above, wherein, the alkaline water electrolysis hydrogen production system also comprises a liquid circulation component; the liquid circulation assembly includes: the alkali liquor circulating pump is respectively communicated with the liquid outlet of the first gas-liquid separator and the liquid outlet of the third gas-liquid separator; the alkali liquor cooler is respectively communicated with the alkali liquor circulating pump and the electrolytic bath; the liquid supplementing pump assembly is communicated with the alkali liquor cooler.
The alkaline water electrolysis hydrogen production system as described above, wherein the oxygen treatment assembly further comprises: the first pipeline is communicated with a second pipeline between the second gas-liquid separator and the first water drainage device, a first switch valve is arranged on the first pipeline, and a second switch valve is arranged on the second pipeline; the third switch valve is arranged on a third pipeline between the first water drainage device and the liquid replenishing tank assembly; the hydrogen processing assembly further comprises: a fourth pipeline, which is communicated with a fifth pipeline between the fourth gas-liquid separator and the second drainer, and is provided with a fourth switch valve, and a fifth switch valve; and a sixth switching valve disposed on a sixth pipe between the second drain and the fluid tank assembly.
The alkaline water electrolysis hydrogen production system as described above, further comprising: a first level sensor disposed within the first drain, the first level sensor configured to detect a level of liquid within the first drain and generate a first level signal; a second liquid level sensor disposed within the second drain, the second liquid level sensor configured to detect a liquid level within the second drain and generate a second liquid level signal; a first controller, which is respectively connected to the first liquid level sensor, the second liquid level sensor, the first switch valve, the second switch valve, the third switch valve, the fourth switch valve, the fifth switch valve and the sixth switch valve; the first controller receives the first liquid level signal and the second liquid level signal, controls the first switch valve, the second switch valve and the third switch valve to be opened or closed according to the first liquid level signal, and controls the fourth switch valve, the fifth switch valve and the sixth switch valve to be opened or closed according to the second liquid level signal.
The alkaline water electrolysis hydrogen production system is characterized in that the first pipeline is provided with a first stop valve; a second stop valve is arranged on the third pipeline; a third stop valve is arranged on the fourth pipeline; and a fourth stop valve is arranged on the sixth pipeline.
The alkaline water electrolysis hydrogen production system as described above, wherein the alkaline water electrolysis hydrogen production system further comprises: a concentration sensor disposed within the electrolytic cell, the concentration sensor configured to detect a concentration of the lye within the electrolytic cell and generate a concentration signal; and the second controller is respectively connected with the concentration sensor and the fluid infusion pump assembly, receives the concentration signal and controls the start and stop of the fluid infusion pump assembly according to the concentration signal.
The system for producing hydrogen by electrolyzing alkaline water as described above, wherein a third liquid level sensor is disposed within the fluid replacement tank assembly, the third liquid level sensor configured to detect a liquid level within the fluid replacement tank assembly and generate a third liquid level signal; and the third controller is respectively connected with the third liquid level sensor and the fluid infusion pump assembly, and controls the starting and stopping of the fluid infusion pump assembly according to the third liquid level signal.
Compared with the prior art, the technical scheme has the following advantages:
the oxygen scrubber cleans oxygen and the hydrogen scrubber cleans hydrogen, the liquid and alkali carried by the oxygen and the hydrogen form alkali liquor, the cleaned oxygen and the hydrogen respectively pass through the second gas-liquid separator and the fourth gas-liquid separator, and the alkali liquor is separated from the oxygen and the hydrogen and respectively stored in the second gas-liquid separator and the fourth gas-liquid separator; and the alkali liquor in the second gas-liquid separator and the fourth gas-liquid separator is respectively stored in the first water drainer and the second water drainer, after the alkali liquor in the first water drainer and the second water drainer reaches the preset volume, the alkali liquor in the first water drainer and the second water drainer is all discharged into the liquid supplementing box assembly, when the alkali liquor needs to be supplemented in the electrolytic bath, the alkali liquor in the liquid supplementing box assembly is supplemented into the electrolytic bath by the liquid supplementing pump assembly, so that the collection and utilization of waste water are realized, and the loss of the alkali liquor amount is reduced.
Drawings
The drawings are only for purposes of illustrating and explaining the present application and are not to be construed as limiting the scope of the present application. Wherein:
FIG. 1 is a schematic diagram of the configuration of an alkaline water electrolysis hydrogen production system according to the present application;
FIG. 2 is a block diagram of a first control portion of the alkaline water electrolysis hydrogen production system according to the present application;
FIG. 3 is a block diagram showing the structure of a second control part of the system for producing hydrogen by alkaline water electrolysis according to the present application;
FIG. 4 is a block diagram showing the structure of the third control part of the system for producing hydrogen by alkaline water electrolysis according to the present application.
The reference numbers illustrate:
10. an electrolytic cell; 20. an oxygen treatment component; 21. a first gas-liquid separator; 22. an oxygen scrubber; 23. an oxygen cooler; 24. a second gas-liquid separator; 25. a first drainer; 26. an oxygen discharge assembly; 30. a hydrogen processing assembly; 31. a third gas-liquid separator; 32. a hydrogen scrubber; 33. a hydrogen gas cooler; 34. a fourth gas-liquid separator; 35. a second drainer; 36. a hydrogen gas discharge assembly; 40. a fluid infusion tank assembly; 50. a fluid infusion pump assembly; 60. a liquid circulation assembly; 61. an alkali liquor circulating pump; 62. an alkali liquor cooler; 71. a first on-off valve; 72. a second on-off valve; 73. a third on-off valve; 74. a fourth switching valve; 75. a fifth on-off valve; 76. a sixth switching valve; 81. a first shut-off valve; 82. a second stop valve; 83. a third stop valve; 84. a fourth stop valve; 91. a first liquid level sensor; 92. a second liquid level sensor; 93. a first controller; 94. a concentration sensor; 95. a second controller; 96. third liquid level sensing; 97. and a third controller.
Detailed Description
The present application is described in further detail below with reference to the figures and examples. The features and advantages of the present application will become more apparent from the description.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, the technical features related to the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other. The following discussion provides a number of embodiments of the present application. While each embodiment represents a single combination of applications, the various embodiments of the disclosure may be substituted or combined in any combination, and thus, the disclosure is intended to include all possible combinations of the same and/or different embodiments of what is described. Thus, if one embodiment comprises A, B, C and another embodiment comprises a combination of B and D, this application should also be considered to include an embodiment that includes one or more of all other possible combinations of A, B, C, D, although this embodiment may not be explicitly recited in text below. In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the present application provides an alkaline water electrolysis hydrogen production system comprising: an electrolyzer 10, an oxygen treatment assembly 20, a hydrogen treatment assembly 30, a fluid replacement tank assembly 40, and a fluid replacement pump assembly 50.
The electrolytic cell 10 is used to electrolyze water to generate oxygen gas to be treated and hydrogen gas to be treated.
The oxygen processing assembly 20 is communicated with the electrolytic bath 10, the oxygen processing assembly 20 is configured to purify oxygen, the oxygen processing assembly 20 comprises a first gas-liquid separator 21, an oxygen scrubber 22, an oxygen cooler 23, a second gas-liquid separator 24 and a first water discharger 25 which are communicated in sequence, and an oxygen discharge assembly 26 is arranged on the second gas-liquid separator 24.
The hydrogen processing assembly 30 is communicated with the electrolytic bath 10, the hydrogen processing assembly 30 is configured to purify hydrogen, the hydrogen processing assembly 30 includes a third gas-liquid separator 31, a hydrogen scrubber 32, a hydrogen cooler 33, a fourth gas-liquid separator 34, a second water drainer 35 which are communicated in sequence, and a hydrogen discharge assembly 36 is arranged on the fourth gas-liquid separator 34.
The fluid replacement tank assembly 40 is in communication with the first and second drains 25, 35, respectively, and the fluid replacement tank assembly 40 is configured to collect fluid within the first and second drains 25, 35.
The fluid replacement pump assembly 50 is respectively communicated with the fluid replacement tank assembly 40 and the electrolytic bath 10, and the fluid replacement pump assembly 50 is configured to discharge the fluid in the fluid replacement tank assembly 40 to be replaced into the electrolytic bath 10.
In the alkaline water electrolysis hydrogen production system provided by the application, the oxygen scrubber 22 cleans oxygen and the hydrogen scrubber 32 cleans hydrogen, liquid and alkali carried by the oxygen and the hydrogen form alkali liquor, the cleaned oxygen and hydrogen pass through the second gas-liquid separator 24 and the fourth gas-liquid separator 34 respectively, and the alkali liquor is separated from the oxygen and the hydrogen and is stored in the second gas-liquid separator 24 and the fourth gas-liquid separator 34 respectively; and the alkali liquor in the second gas-liquid separator 24 and the fourth gas-liquid separator 34 is respectively stored in the first water drainer 25 and the second water drainer 35, when the alkali liquor in the first water drainer 25 and the second water drainer 35 reaches the preset volume, the alkali liquor in the first water drainer 25 and the second water drainer 35 is discharged into the liquid supplementing tank assembly 40, and when the alkali liquor needs to be supplemented into the electrolytic cell 10, the liquid supplementing pump assembly 50 supplements the alkali liquor in the liquid supplementing tank assembly 40 into the electrolytic cell 10, so that the collection and utilization of waste water are realized, and the loss of the alkali liquor amount is reduced.
As shown in FIG. 1, in one embodiment of the present application, the alkaline water electrolysis hydrogen production system further includes a liquid circulation assembly 60.
The liquid circulation assembly 60 includes: a lye circulating pump 61 and a lye cooler 62.
The alkali liquor circulating pump 61 is respectively communicated with the liquid outlet of the first gas-liquid separator 21 and the liquid outlet of the third gas-liquid separator 31.
The lye cooler 62 is respectively communicated with the lye circulating pump 61 and the electrolytic bath 10.
The fluid replenishing pump assembly 50 is in communication with the first gas-liquid separator 21 and/or the third gas-liquid separator 31.
The hydrogen and oxygen decomposed from the electrolytic bath 10 are both provided with alkali liquor, when the hydrogen and oxygen pass through the first gas-liquid separator 21 and the second gas-liquid separator 24 respectively, the alkali liquor is separated from the oxygen and the hydrogen and is stored in the first gas-liquid separator 21 and the second gas-liquid separator 24 respectively, when the alkali liquor needs to be supplemented in the electrolytic bath 10, the alkali liquor in the first gas-liquid separator 21 and the second gas-liquid separator 24 is pumped out by the alkali liquor circulating pump 61 and is supplemented into the electrolytic bath 10 through the alkali liquor cooler 62, so that the collection and utilization of waste water are realized, and the loss of the alkali liquor amount is reduced. In addition, the liquid supplementing pump assembly 50 supplements the liquid in the liquid supplementing tank assembly 40 to the first gas-liquid separator 21 and/or the third gas-liquid separator 31, on one hand, the temperature of the alkali liquor in the liquid supplementing pump assembly 50 is low, the alkali liquor with low temperature is supplemented to the first gas-liquid separator 21 and/or the third gas-liquid separator 31, and the temperature of the gas passing through the first gas-liquid separator 21 and/or the third gas-liquid separator 31 can be reduced; on the other hand, the alkali liquor in the liquid supplementing pump assembly 50 firstly enters the first gas-liquid separator 21 and/or the third gas-liquid separator 31 and is supplemented into the electrolytic cell 10 through the alkali liquor circulating pump 61 and the alkali liquor cooler 62, so that the situation that the pressure in the system is greatly changed when the alkali liquor is supplemented is avoided, and the stable operation of the system is ensured.
In one embodiment of the present application, a fluid replacement tank assembly comprises: the first box and the second box.
The first tank is in communication with the first drain, the first tank configured to collect liquid within the first drain.
The second tank communicates with the second drain, and the second tank is configured to collect liquid in the second drain.
The fluid infusion pump subassembly includes: the first liquid pump is respectively communicated with the first box body and the first gas-liquid separator, and the first liquid pump is configured to discharge liquid in the first box body.
The second liquid pump is respectively communicated with the second box body and the second gas-liquid separator, and the second liquid pump is configured to discharge liquid in the second box body.
The structure enables the oxygen treatment component and the hydrogen treatment component to be respectively provided with an independent device for recovering and supplementing alkali liquor, so that the alkali liquor generated by the oxygen treatment component and the alkali liquor generated by the hydrogen treatment component can be independently supplemented into the electrolytic cell.
In one embodiment of the present application, the make-up pump assembly is in communication with the first gas-liquid separator through a first recovery pipe coiled around the conduit between the electrolyzer and the first gas-liquid separator.
The temperature of alkali liquor in the liquid supplementing pump component is low, and the structure can cool oxygen generated from the electrolytic bath, so that the energy of the system is reasonably utilized, and the energy-saving and environment-friendly effects are achieved.
Similarly, in another embodiment of the present application, the make-up pump assembly communicates with the second gas-liquid separator through a second recovery pipe coiled on a pipe between the electrolytic bath and the second gas-liquid separator.
The temperature of alkali liquor in the liquid supplementing pump component is lower, and the structure can cool down the hydrogen generated from the electrolytic bath, so that the energy of the system is reasonably utilized, and the energy-saving and environment-friendly effects are realized.
As shown in FIG. 1, in one embodiment of the present application, the alkaline water electrolysis hydrogen production system further includes a liquid circulation assembly 60.
The liquid circulation assembly 60 includes: a lye circulating pump 61 and a lye cooler 62.
The alkali liquor circulating pump 61 is respectively communicated with the liquid outlet of the first gas-liquid separator 21 and the liquid outlet of the third gas-liquid separator 31.
The lye cooler 62 is respectively communicated with the lye circulating pump 61 and the electrolytic bath 10.
The fluid replacement pump assembly 50 is in communication with the lye cooler 62.
The hydrogen and oxygen decomposed from the electrolytic bath 10 are both provided with alkali liquor, when the hydrogen and oxygen pass through the first gas-liquid separator 21 and the second gas-liquid separator 24 respectively, the alkali liquor is separated from the oxygen and the hydrogen and is stored in the first gas-liquid separator 21 and the second gas-liquid separator 24 respectively, when the alkali liquor needs to be supplemented in the electrolytic bath 10, the alkali liquor in the first gas-liquid separator 21 and the second gas-liquid separator 24 is pumped out by the alkali liquor circulating pump 61 and is supplemented into the electrolytic bath 10 through the alkali liquor cooler 62, so that the collection and utilization of waste water are realized, and the loss of the alkali liquor amount is reduced.
As shown in fig. 1, in one embodiment of the present application, the oxygen treatment assembly 20 further comprises: a first pipe and a third on/off valve 73.
The first pipe is communicated with a second pipe between the second gas-liquid separator 24 and the first drain 25, the first pipe is provided with a first on-off valve 71, and the second pipe is provided with a second on-off valve 72.
The third on/off valve 73 is provided on the third pipe between the first drain 25 and the fluid replacement tank assembly 40.
The alkali liquor in the second gas-liquid separator 24 is discharged into the first water discharger 25 at regular time through the opening and closing of the second switch valve 72; when the alkali liquor in the first drainer 25 needs to be discharged into the liquid replenishing tank assembly 40, the second switch valve 72 is closed, the first switch valve 71 is opened for a set time (the set time is 2-3 seconds) so as to reduce the pressure in the first drainer 25, and after the first switch valve 71 is closed, the third switch valve 73 is opened so as to enable the alkali liquor in the first drainer 25 to enter the liquid replenishing tank assembly 40; when the alkali liquid in the first water discharger 25 is discharged to the set liquid level, the third on/off valve 73 is closed.
Similarly, in another embodiment of the present application, the hydrogen processing assembly 30 further comprises: a fourth pipe, and a sixth switching valve 76.
The fourth pipe is communicated with a fifth pipe between the fourth gas-liquid separator 34 and the second drainer 35, the fourth pipe is provided with a fourth on-off valve 74, and the fifth pipe is provided with a fifth on-off valve 75.
A sixth switching valve 76 is provided on the sixth pipe between the second drain 35 and the fluid replacement tank assembly 40.
The alkali liquor in the fourth gas-liquid separator 34 is discharged into the second water drainer 35 at regular time through the opening and closing of the fifth switch valve 75; when the alkali liquor in the second water drainer 35 needs to be discharged into the liquid replenishing tank assembly 40, the fifth switch valve 75 is closed, the fourth switch valve 74 is opened for a set time (the set time is 2-3 seconds) so as to reduce the pressure in the second water drainer 35, and after the fourth switch valve 74 is closed, the sixth switch valve 76 is opened so as to enable the alkali liquor in the second water drainer 35 to enter the liquid replenishing tank assembly 40; when the lye in the second drainer 35 is drained to the set level, the sixth on-off valve 76 is closed.
As shown in fig. 2, in one embodiment of the present application, the alkaline water electrolysis hydrogen production system further comprises: a first liquid level sensor 91, a second liquid level sensor 92, and a first controller 93.
A first fluid level sensor 91 is disposed within first drain 25, first fluid level sensor 91 being configured to detect a fluid level within first drain 25 and generate a first fluid level signal.
A second level sensor 92 is disposed within the second drain 35, the second level sensor 92 being configured to detect a level of liquid within the second drain 35 and generate a second level signal.
The first controller 93 is connected to the first liquid level sensor 91, the second liquid level sensor 92, the first on-off valve 71, the second on-off valve 72, the third on-off valve 73, the fourth on-off valve 74, the fifth on-off valve 75, and the sixth on-off valve 76, respectively.
The first controller 93 receives the first liquid level signal and the second liquid level signal, and controls the first switch valve 71, the second switch valve 72, and the third switch valve 73 to open or close according to the first liquid level signal, and controls the fourth switch valve 74, the fifth switch valve 75, and the sixth switch valve 76 to open or close according to the second liquid level signal.
When the first liquid level sensor 91 detects that the alkali liquor in the first water discharger 25 reaches the preset volume, the first controller 93 controls the second switch valve 72 to be closed and the first switch valve 71 to be opened for a set time (the set time is 2-3 seconds) according to the first liquid level signal, so that the pressure in the first water discharger 25 is reduced, and after the first switch valve 71 is closed, the first controller 93 controls the third switch valve 73 to be opened, so that the alkali liquor in the first water discharger 25 enters the liquid replenishing tank assembly 40; when the alkali liquid in the first water discharger 25 is discharged to the set liquid level, the first controller 93 controls the third on/off valve 73 to close.
Similarly, when the second liquid level sensor 92 detects that the alkali liquor in the second water drainer 35 reaches the preset volume, according to the second liquid level signal, the first controller 93 controls the fifth switch valve 75 to close, the fourth switch valve 74 is opened for the set time (the set time is 2-3 seconds), so as to reduce the pressure in the second water drainer 35, and after the fourth switch valve 74 is closed, the first controller 93 controls the sixth switch valve 76 to open, so as to enable the alkali liquor in the second water drainer 35 to enter the liquid replenishing tank assembly 40; when the lye in the second drainer 35 is drained to the set level, the first controller 93 controls the sixth switch valve 76 to close.
In one embodiment of the present application, as shown in fig. 1, a first shut-off valve 81 is provided on the first pipe.
A second shut-off valve 82 is provided on the third conduit.
A third shut-off valve 83 is arranged in the fourth conduit.
A fourth shut-off valve 84 is provided on the sixth conduit.
The stop valve can control the flow of liquid passing through the stop valve, so that the stop valve can control the flow of liquid in the pipeline where the stop valve is located, and a person skilled in the art can select the flow of the alkali liquor in the first pipeline, the third pipeline, the fourth pipeline and the sixth pipeline according to the requirement.
As shown in fig. 3, in one embodiment of the present application, the alkaline water electrolysis hydrogen production system further comprises: a concentration sensor 94 and a second controller 95.
A concentration sensor 94 is disposed within the electrolytic cell 10, the concentration sensor 94 being configured to detect a concentration of the lye within the electrolytic cell 10 and generate a concentration signal.
The second controller 95 is connected with the concentration sensor 94 and the fluid infusion pump assembly 50 respectively, and the second controller 95 receives the concentration signal and controls the start and stop of the fluid infusion pump assembly 50 according to the concentration signal.
When the concentration sensor 94 detects that the concentration of the alkali liquor in the electrolytic cell 10 is not high, the second controller 95 controls the liquor supplementing pump assembly 50 to supplement the alkali liquor in the liquor supplementing tank assembly 40 into the electrolytic cell 10 according to the signal of the concentration sensor 94, so that the collection and utilization of the waste water are realized, and the loss of the alkali liquor amount is reduced.
As shown in fig. 4, in one embodiment of the present application, a third level sensor 96 and a third controller 97.
A third fluid level sensor 96 is disposed within the fluid replacement tank assembly 40, the third fluid level sensor 96 configured to detect a fluid level within the fluid replacement tank assembly 40 and generate a third fluid level signal.
The third controller 97 is connected to the third liquid level sensor 96 and the fluid infusion pump assembly 50, and the third controller 97 controls the start and stop of the fluid infusion pump assembly 50 according to the third liquid level signal.
When the third liquid level sensor 96 detects that the liquid in the liquid replenishing tank assembly 40 reaches the preset volume, the third controller 97 controls the liquid replenishing pump assembly 50 to replenish the alkali liquid in the liquid replenishing tank assembly 40 into the electrolytic cell 10 according to the third liquid level signal, so that the collection and utilization of the waste water are realized, and the loss of the alkali liquid amount is reduced.
In the description of the present application, it should be noted that the terms "first", "second", "third", "fourth", "fifth" and "sixth" 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 is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically indicated and limited. The term "plurality" means two or more unless expressly limited otherwise. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The present application has been described above with reference to preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the present application can be subjected to various substitutions and modifications, which are all within the scope of protection of the present application.
Claims (10)
1. An alkaline water electrolysis hydrogen production system, characterized in that the alkaline water electrolysis hydrogen production system comprises: an electrolysis cell for electrolyzing water to generate oxygen to be treated and hydrogen to be treated;
the oxygen treatment assembly is communicated with the electrolytic bath and is configured to purify oxygen, the oxygen treatment assembly comprises a first gas-liquid separator, an oxygen scrubber, an oxygen cooler, a second gas-liquid separator and a first water discharger which are sequentially communicated, and an oxygen discharge assembly is arranged on the second gas-liquid separator;
the hydrogen treatment assembly is communicated with the electrolytic bath and is configured to purify hydrogen, the hydrogen treatment assembly comprises a third gas-liquid separator, a hydrogen scrubber, a hydrogen cooler, a fourth gas-liquid separator and a second water drainer which are sequentially communicated, and a hydrogen discharge assembly is arranged on the fourth gas-liquid separator;
a fluid replacement tank assembly in communication with the first and second drains, respectively, the fluid replacement tank assembly configured to collect fluid within the first and second drains; and
the fluid replacement pump assembly is respectively communicated with the fluid replacement tank assembly and the electrolytic cell, and the fluid replacement pump assembly is configured to discharge the fluid in the fluid replacement tank assembly so as to be replaced into the electrolytic cell.
2. The system for hydrogen production by alkaline water electrolysis according to claim 1,
the alkaline water electrolysis hydrogen production system also comprises a liquid circulation component;
the liquid circulation assembly includes: the alkali liquor circulating pump is respectively communicated with the liquid outlet of the first gas-liquid separator and the liquid outlet of the third gas-liquid separator; and
the alkali liquor cooler is respectively communicated with the alkali liquor circulating pump and the electrolytic bath;
the fluid infusion pump assembly is in communication with the first gas-liquid separator and/or the third gas-liquid separator.
3. The system for hydrogen production by alkaline water electrolysis according to claim 2,
the fluid infusion tank assembly comprises: a first tank in communication with the first drain, the first tank configured to collect liquid within the first drain; and
a second tank in communication with the second drain, the second tank configured to collect liquid within the second drain;
the fluid replacement pump assembly comprises: a first liquid pump that communicates with the first tank and the first gas-liquid separator, respectively, the first liquid pump being configured to discharge liquid in the first tank; and
a second liquid pump that communicates with the second tank and the second gas-liquid separator, respectively, the second liquid pump being configured to discharge liquid in the second tank.
4. The system for hydrogen production by alkaline water electrolysis according to claim 2,
the liquid supplementing pump assembly is communicated with the first gas-liquid separator through a first recovery pipe, and the first recovery pipe is coiled on a pipeline between the electrolytic bath and the first gas-liquid separator; or
The liquid supplementing pump assembly is communicated with the second gas-liquid separator through a second recovery pipe, and the second recovery pipe is wound on a pipeline between the electrolytic tank and the second gas-liquid separator.
5. The system for hydrogen production by alkaline water electrolysis according to claim 1,
the alkaline water electrolysis hydrogen production system also comprises a liquid circulation component;
the liquid circulation assembly includes: the alkali liquor circulating pump is respectively communicated with the liquid outlet of the first gas-liquid separator and the liquid outlet of the third gas-liquid separator; and
the alkali liquor cooler is respectively communicated with the alkali liquor circulating pump and the electrolytic bath;
and the liquid supplementing pump assembly is communicated with the alkali liquor cooler.
6. The system for hydrogen production by alkaline water electrolysis according to claim 1,
the oxygen treatment assembly further comprises: the first pipeline is communicated with a second pipeline between the second gas-liquid separator and the first water drainage device, a first switch valve is arranged on the first pipeline, and a second switch valve is arranged on the second pipeline; and
the third switch valve is arranged on a third pipeline between the first water drainage device and the liquid replenishing tank assembly;
the hydrogen processing assembly further comprises: a fourth pipeline, which is communicated with a fifth pipeline between the fourth gas-liquid separator and the second water drainer, and is provided with a fourth switch valve, and a fifth switch valve; and
a sixth switching valve disposed on a sixth conduit between the second drain and the fluid refill tank assembly.
7. The system for the production of hydrogen by the electrolysis of alkaline water according to claim 6,
the alkaline water electrolysis hydrogen production system also comprises: a first level sensor disposed within the first drain, the first level sensor configured to detect a level of liquid within the first drain and generate a first level signal;
a second level sensor disposed within the second drain, the second level sensor configured to detect a level of liquid within the second drain and generate a second level signal;
a first controller, which is respectively connected to the first liquid level sensor, the second liquid level sensor, the first switch valve, the second switch valve, the third switch valve, the fourth switch valve, the fifth switch valve and the sixth switch valve;
the first controller receives the first liquid level signal and the second liquid level signal, controls the first switch valve, the second switch valve and the third switch valve to be opened or closed according to the first liquid level signal, and controls the fourth switch valve, the fifth switch valve and the sixth switch valve to be opened or closed according to the second liquid level signal.
8. The system for the production of hydrogen by the electrolysis of alkaline water according to claim 6,
a first stop valve is arranged on the first pipeline; a second stop valve is arranged on the third pipeline;
a third stop valve is arranged on the fourth pipeline; and a fourth stop valve is arranged on the sixth pipeline.
9. The system for hydrogen production by alkaline water electrolysis according to claim 1,
the alkaline water electrolysis hydrogen production system further comprises: a concentration sensor disposed within the electrolytic cell, the concentration sensor configured to detect a concentration of the lye within the electrolytic cell and generate a concentration signal; and
and the second controller is respectively connected with the concentration sensor and the fluid infusion pump assembly, receives the concentration signal and controls the start and stop of the fluid infusion pump assembly according to the concentration signal.
10. The system for hydrogen production by alkaline water electrolysis according to claim 1,
a third liquid level sensor disposed within the fluid replacement tank assembly, the third liquid level sensor configured to detect a liquid level within the fluid replacement tank assembly and generate a third liquid level signal; and
and the third controller is respectively connected with the third liquid level sensor and the fluid infusion pump assembly, and controls the starting and stopping of the fluid infusion pump assembly according to the third liquid level signal.
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