CN214361730U - Water electrolysis hydrogen production device with diaphragm - Google Patents
Water electrolysis hydrogen production device with diaphragm Download PDFInfo
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- CN214361730U CN214361730U CN202121813791.1U CN202121813791U CN214361730U CN 214361730 U CN214361730 U CN 214361730U CN 202121813791 U CN202121813791 U CN 202121813791U CN 214361730 U CN214361730 U CN 214361730U
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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
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- 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
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Abstract
The utility model discloses a water electrolysis hydrogen production device with a diaphragm, which comprises an electrolytic bath, a hydrogen separator and an oxygen separator; the electrolytic bath comprises a cathode plate, a cathode metal net, a first gasket, a diaphragm, a second gasket, an anode metal net, an anode plate, a hydrogen liquid outlet and an oxygen liquid outlet; the separator has a polytetrafluoroethylene porous membrane substrate layer and a perfluorosulfonic acid resin surface layer, or the separator has a polytetrafluoroethylene porous membrane substrate layer and a sulfonated polyether ether ketone surface layer; the diaphragm is disposed between the first spacer and the second spacer. The utility model discloses a device can reduce the energy consumption.
Description
Technical Field
The utility model relates to a water electrolysis hydrogen production device with a diaphragm.
Background
The traditional alkaline water electrolysis hydrogen production device has the advantages that the diaphragm resistance is large, and the electrolysis efficiency is slightly low; the distance between the cathode plate and the anode plate in the electrolytic cell is larger, so that the resistance between the cathode and the anode is larger, and the improvement of the electrolytic efficiency is not facilitated. In addition, the electrolyte separated in the hydrogen separator and the oxygen separator generally flows directly into the electrolytic cell, which is not favorable for the balance of the electrolyte concentration in the electrolytic cell.
CN102943282A discloses an electrolyte self-circulation medium-pressure water electrolysis hydrogen production system. The electrolytic bath comprises an oxygen separator, a hydrogen separator and an electrolytic bath, wherein heat exchange tubes are respectively arranged in the oxygen separator and the hydrogen separator; one side of the electrolytic cell is respectively connected with a first oxygen electrolyte mixing outlet pipe and a first hydrogen electrolyte mixing outlet pipe, and the other side of the electrolytic cell is respectively connected with a second oxygen electrolyte mixing outlet pipe and a second hydrogen electrolyte mixing outlet pipe; the two sides of the electrolytic cell are respectively connected with a first return pipe and a second return pipe, a third return pipe is arranged below the inside of the electrolytic cell, a plurality of small electrolytic cells are arranged inside the electrolytic cell, and small holes corresponding to the small electrolytic cells are arranged on a pipe body of the third return pipe. The electrolyte self-circulation system of this patent document is relatively complicated.
CN111118526A discloses an electrolytic cell for producing hydrogen by water electrolysis, comprising: the first heat dissipation aluminum seat at the upper end and the second heat dissipation aluminum seat at the lower end are respectively provided with a plurality of heat dissipation fins, an electrolysis electrode assembly is arranged between the first heat dissipation aluminum seat and the second heat dissipation aluminum seat, the upper part and the lower part of the electrolysis electrode assembly are respectively provided with a sealing cover plate, a heat dissipation fan is also arranged above the first heat dissipation aluminum seat, and a heat dissipation fan is also arranged below the second heat dissipation aluminum seat and is connected together through a plurality of screw rods and nuts. This patent document merely reduces the power loss of the electrolytic cell by dissipating heat from the electrolytic cell.
CN203625487U discloses an ionic membrane electrolytic cell, which comprises an ionic membrane, a cathode and an anode are respectively attached to two sides of the ionic membrane, the cathode comprises a cathode support net, an elastic net, a protection net and an active coating surface net which are sequentially arranged, the active coating surface net is close to the ionic membrane, and the cathode is provided with a precipitation device for precipitating redundant iron ions and a discharge device for discharging the precipitated iron ions. The cathode structure of this patent document is relatively complex and does not mention the recycling of the electrolyte.
Thus, further improvements in alkaline electrolyzed water hydrogen production apparatus are desired.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a hydrogen production apparatus by water electrolysis with a diaphragm. The utility model discloses a device can reduce the energy consumption. Further, the electrolysis efficiency of hydrogen production by water electrolysis can be greatly improved. Specifically, the electrolytic efficiency can be improved from the traditional 80 percent to more than 95 percent. In addition, the device can make electrolyte concentration balanced, improves the stability of production. The utility model discloses a following technical scheme reaches above-mentioned purpose.
The utility model provides a water electrolysis hydrogen production device with a diaphragm, which comprises an electrolytic bath, a hydrogen separator and an oxygen separator;
the electrolytic bath comprises a cathode plate, a cathode metal net, a first gasket, a diaphragm, a second gasket, an anode metal net, an anode plate, a hydrogen liquid outlet and an oxygen liquid outlet;
the separator has a polytetrafluoroethylene porous membrane substrate layer and a perfluorosulfonic acid resin surface layer, or the separator has a polytetrafluoroethylene porous membrane substrate layer and a sulfonated polyether ether ketone surface layer; the diaphragm is arranged between the first gasket and the second gasket;
the cathode metal net is arranged between the cathode plate and the first gasket, and two sides of the cathode metal net are respectively arranged in a manner of clinging to the cathode plate and the first gasket; a cathode chamber is formed between the cathode plate and the diaphragm and is configured to contain a catholyte; the cathode chamber is communicated with a hydrogen liquid outlet;
the anode metal mesh is arranged between the anode plate and the second gasket, and two sides of the anode metal mesh are respectively arranged in a manner of clinging to the anode plate and the second gasket; an anode chamber is formed between the anode plate and the diaphragm and is configured to contain an anolyte; the anode chamber is communicated with an oxygen liquid outlet;
the hydrogen separator is provided with a hydrogen liquid inlet, a hydrogen outlet and a hydrogen separator electrolyte outlet, the hydrogen separator is used for separating hydrogen and electrolyte, and the hydrogen liquid inlet is connected with the hydrogen liquid outlet of the electrolytic cell;
the oxygen separator is provided with an oxygen liquid inlet, an oxygen outlet and an electrolyte outlet of the oxygen separator, the oxygen separator is used for separating oxygen and electrolyte, and the oxygen liquid inlet is connected with the oxygen liquid outlet of the electrolytic cell.
According to the device of the present invention, preferably, the thickness of the diaphragm is 10 to 100 μm; the polytetrafluoroethylene porous membrane has micropores with a pore diameter of 100-2000 nm.
The device according to the present invention, preferably, the device further comprises a balance pipe connected to the oxygen separator electrolyte outlet and the hydrogen separator electrolyte outlet, respectively, for balancing the liquid level of the hydrogen separator and the liquid level of the oxygen separator.
The device according to the present invention preferably further comprises an electrolyte mixer and a circulation pump, wherein,
the electrolyte mixer is provided with an inlet end and an outlet end, and the inlet end is respectively connected with the electrolyte outlet of the hydrogen separator and the electrolyte outlet of the oxygen separator;
the circulating pump is provided with a circulating pump inlet and a circulating pump outlet, the circulating pump inlet is connected with the outlet end of the electrolyte mixer, and the circulating pump outlet is connected with the electrolytic bath.
The device according to the present invention preferably further comprises a hydrogen scrubber and an oxygen scrubber;
the hydrogen scrubber is provided with a hydrogen inlet to be scrubbed, a desalted water inlet of the hydrogen scrubber and a scrubbing hydrogen outlet; the hydrogen inlet to be washed is connected with the hydrogen outlet of the hydrogen separator.
The oxygen scrubber is provided with an oxygen inlet to be scrubbed, an oxygen scrubber desalted water inlet and a scrubbing oxygen outlet; the oxygen inlet to be washed is connected with the oxygen outlet of the oxygen separator.
The device according to the utility model, preferably, the device still include hydrogen purification equipment, hydrogen purification equipment with the washing hydrogen export of hydrogen scrubber links to each other.
The apparatus according to the present invention, preferably, the apparatus further comprises an oxygen purification device connected to the scrubbing oxygen outlet of the oxygen scrubber.
According to the utility model discloses a device, preferably:
the hydrogen scrubber also has a hydrogen scrubber scrubbing liquid outlet for discharging a scrubbing liquid generated by the hydrogen scrubber scrubbing hydrogen gas;
the oxygen scrubber also has an oxygen scrubber scrubbing liquid outlet for discharging scrubbing liquid produced by the oxygen scrubber scrubbing oxygen.
According to the utility model discloses a device, preferably:
the hydrogen separator is also provided with a washing liquid inlet of the hydrogen separator, and the washing liquid inlet of the hydrogen separator is connected with the washing liquid outlet of the hydrogen scrubber;
the oxygen separator is also provided with an oxygen separator washing liquid inlet which is connected with the oxygen scrubber washing liquid outlet.
The device of the utility model preferably further comprises a desalting water device and a feeding pump;
the desalted water equipment is used for purifying water and is provided with a desalted water equipment outlet which is respectively connected with the desalted water inlet of the hydrogen scrubber and the desalted water inlet of the oxygen scrubber;
the feed pump is provided with a feed pump inlet and a feed pump outlet, the feed pump inlet is connected with the outlet of the desalted water equipment, and the feed pump outlet is respectively connected with the desalted water inlet of the hydrogen scrubber and the desalted water inlet of the oxygen scrubber.
The utility model discloses a be equivalent to zero polar distance between negative pole, diaphragm and the positive pole, resistance is less. Adopt the utility model discloses a diaphragm can reduce diaphragm resistance, improves the electric conductivity of diaphragm. The device of the utility model can greatly improve the electrolysis efficiency, and the electrolysis efficiency can be improved to more than 95 percent from the traditional 80 percent. Furthermore, the utility model discloses a device can carry the electrolyte of separating out in hydrogen separator and the oxygen separator to the electrolysis trough after being mixed by the electrolyte mixer for electrolyte concentration is balanced, improves the stability of production.
Drawings
Fig. 1 is a schematic diagram of a water electrolysis hydrogen production device with a diaphragm according to the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
FIG. 3 is a schematic view of the installation of the electrolytic cell of the present invention.
The reference numerals are explained below:
100-electrolytic cell, 110-cathode plate, 120-cathode metal net, 161-first gasket, 130-diaphragm, 162-second gasket, 140-anode metal net, 150-anode plate, 210-hydrogen separator, 220-oxygen separator, 310-hydrogen scrubber, 320-oxygen scrubber, 400-electrolyte mixer, 500-circulation pump, 600-demineralized water device, 700-feed pump.
Detailed Description
The invention will be further described with reference to the drawings and the following examples, but the scope of the invention is not limited thereto.
The water electrolysis hydrogen production device with the diaphragm comprises an electrolytic bath, a hydrogen separator, an oxygen separator, a hydrogen washer, an oxygen washer, an electrolyte mixer and a circulating pump. Optionally, the hydrogen production apparatus by water electrolysis with a diaphragm of the present invention may further include a demineralized water device, a feed pump, a hydrogen purification device, and an oxygen purification device. Optionally, the hydrogen production apparatus by water electrolysis with a diaphragm of the present invention may further include a balance tube. As described in detail below.
< electrolytic cell >
The utility model discloses an electrolytic bath comprises a cathode plate, a cathode metal net, a first gasket, a diaphragm, a second gasket, an anode metal net and an anode plate. Thus being beneficial to forming an electrolytic tank with zero polar distance, greatly reducing the resistance among the cathode, the diaphragm and the anode, reducing the energy consumption and improving the electrolytic efficiency.
In certain embodiments, the separator has a polytetrafluoroethylene porous membrane substrate layer and a perfluorosulfonic acid resin surface layer. Specifically, the separator uses a polytetrafluoroethylene porous membrane as a substrate layer, and a perfluorosulfonic acid resin is coated on the substrate layer to form a surface layer. In other embodiments, the separator has a polytetrafluoroethylene porous membrane substrate layer and a sulfonated polyetheretherketone surface layer. Specifically, the diaphragm takes a polytetrafluoroethylene porous membrane as a substrate layer, and a surface layer is formed by coating sulfonated polyether ether ketone on the substrate layer. The polytetrafluoroethylene porous membrane and the perfluorinated sulfonic acid resin and the sulfonated polyether ether ketone belong to materials known in the field and are not described in detail here. Sulfonated polyetheretherketone may be abbreviated SPEEK.
The polytetrafluoroethylene porous membrane may be a polytetrafluoroethylene skeleton-type porous membrane. The polytetrafluoroethylene porous membrane has micropores with a pore diameter of 100 to 2000 nm. The pore diameter of the micropores is preferably 130 to 1500nm, more preferably 150 to 1300nm, and still more preferably 150 to 800 nm. The aperture of the micropores is small, so that the electrolyte can pass through, and gas can be isolated at the same time. The diaphragm structure is also beneficial to reducing the resistance of the diaphragm, reducing the energy consumption and improving the water electrolysis efficiency.
In certain embodiments, the separator has a polytetrafluoroethylene porous membrane substrate layer and two perfluorosulfonic acid resin surface layers, the two perfluorosulfonic acid resin surface layers being located on both sides of the polytetrafluoroethylene porous membrane substrate layer, respectively. In other embodiments, the separator has a polytetrafluoroethylene porous membrane substrate layer and two sulfonated polyetheretherketone surface layers, the two sulfonated polyetheretherketone surface layers being located on both sides of the polytetrafluoroethylene porous membrane substrate layer. The thickness of the separator may be 10 to 100 μm. The thickness of the traditional diaphragm is 300-800 mu m, and the resistance is larger.
The diaphragm is provided with a first gasket and a second gasket on two sides respectively. The cathode metal net is arranged between the cathode plate and the first gasket, and the two sides of the cathode metal net are respectively tightly attached to the cathode plate and the first gasket. The anode metal mesh is arranged between the anode plate and the second gasket, and two sides of the anode metal mesh are respectively tightly attached to the anode plate and the second gasket. The structure is beneficial to forming a diaphragm electrolytic cell with zero polar distance and reducing energy consumption. In addition, the arrangement of the first gasket and the second gasket can be used for protecting and fixing the diaphragm, and the service life of the diaphragm is prolonged.
A cathode chamber is formed between the cathode plate and the diaphragm, the cathode chamber being configured to contain a catholyte. For example, the cathode compartment is filled with catholyte. The cathode metal mesh is positioned in the cathode chamber. The cathode chamber is communicated with a hydrogen liquid outlet. This allows the mixture of hydrogen gas and electrolyte to be discharged.
An anode chamber is formed between the anode plate and the diaphragm, and the anode chamber is configured to contain an anolyte. For example, an anolyte is charged to the anode chamber. The anode metal mesh is positioned in the anode chamber. The anode chamber is communicated with an oxygen liquid outlet. This allows the mixture of oxygen and electrolyte produced in the anode compartment to be discharged.
In the present invention, the first gasket and the second gasket may have the same structure. For example, the first gasket and the second gasket are both square gaskets with openings in the middle. The first gasket and the second gasket may be made of polytetrafluoroethylene. Such materials are corrosion resistant.
In the utility model, the electrolytic bath is provided with a hydrogen gas liquid outlet and an oxygen gas liquid outlet. The hydrogen gas liquid outlet is used for discharging a mixture of the hydrogen gas and the electrolyte. The oxygen liquid outlet is used for discharging the mixture of the oxygen and the electrolyte.
According to the principle of water electrolysis, hydrogen is generated in the cathode chamber, and the generated hydrogen is discharged to a hydrogen separator through a hydrogen gas-liquid outlet; the anode chamber generates oxygen, and the generated oxygen is discharged to the oxygen separator through the oxygen liquid outlet.
In the utility model, the anode chamber and the cathode chamber can be a plurality of groups.
In the present invention, other structures of the electrolytic cell than the structures of the cathode chamber and the anode chamber may employ those known in the art. For example, the electrolytic cell of the utility model also comprises an insulating plate, a polar frame and the like.
In the utility model, the zero polar distance is arranged between the cathode, the diaphragm and the anode, so the resistance is minimum, and the novel diaphragm is adopted to replace the traditional diaphragm, thus the electrolysis efficiency is greatly improved. The electrolytic efficiency can be improved to more than 95 percent from the traditional 80 percent, and the energy consumption can be reduced.
< Hydrogen separator >
The hydrogen separator of the utility model is provided with a hydrogen liquid inlet, a hydrogen outlet, a hydrogen separator electrolyte outlet and a hydrogen separator washing liquid inlet. The hydrogen separator is used for separating hydrogen gas and electrolyte. Thus, the mixture of the hydrogen and the electrolyte can be separated to obtain the hydrogen and the electrolyte, thereby facilitating the further purification of the hydrogen.
The hydrogen liquid inlet is connected with the hydrogen liquid outlet of the electrolytic cell, namely, the mixture of the hydrogen and the electrolyte generated by the electrolytic cell enters the hydrogen separator. The hydrogen outlet is used for discharging hydrogen separated from most of electrolyte. And the electrolyte outlet of the hydrogen separator is used for discharging the separated electrolyte to the electrolyte mixer.
< Hydrogen scrubber >
The utility model discloses a hydrogen scrubber has the hydrogen import, hydrogen scrubber demineralized water import, washing hydrogen export and the export of hydrogen scrubber washing liquid of remaining to wash. The hydrogen scrubber is used to scrub the electrolyte (lye) in the hydrogen gas. The inlet of the hydrogen to be washed is connected with the hydrogen outlet of the hydrogen separator. The washing hydrogen outlet is connected with hydrogen purification equipment. The hydrogen purification equipment is used for further purifying the washing hydrogen obtained by the hydrogen washer. The hydrogen scrubber scrubbing liquid outlet of the hydrogen scrubber is connected with the hydrogen separator scrubbing liquid inlet of the hydrogen separator. Therefore, the washing liquid generated by the hydrogen scrubber can be discharged into the hydrogen separator and then into the electrolytic cell, so that the cyclic utilization of the washing liquid is realized, the resource is saved, and the hydrogen scrubber is more environment-friendly.
< oxygen separator >
The oxygen separator of the utility model is provided with an oxygen liquid inlet, an oxygen outlet, an oxygen separator electrolyte outlet and an oxygen separator washing liquid inlet. The oxygen separator is used for separating oxygen and electrolyte. The oxygen liquid inlet is connected with the oxygen liquid outlet of the electrolytic cell, namely the electrolytic cell discharges the mixture of the generated oxygen and the electrolyte to the oxygen separator for separation. The oxygen outlet is used to discharge oxygen, which separates most of the electrolyte, to the oxygen scrubber. And the electrolyte outlet of the oxygen separator is used for discharging the separated electrolyte to the electrolyte mixer.
< oxygen scrubber >
The oxygen scrubber of the utility model has an oxygen inlet, an oxygen scrubber desalted water inlet, an oxygen scrubber cleaning water outlet and an oxygen scrubber cleaning liquid outlet. The oxygen scrubber is used to scrub the electrolyte (lye) in the oxygen. The oxygen inlet to be washed is connected with the oxygen outlet of the oxygen separator. The washing oxygen outlet is connected with oxygen purification equipment. The oxygen purification equipment is used for further purifying the washing oxygen obtained by the oxygen washer. An oxygen scrubber scrubbing liquid outlet of the oxygen scrubber is connected with an oxygen separator scrubbing liquid inlet of the oxygen separator. Therefore, the cleaning solution generated by the oxygen scrubber is discharged into the oxygen separator and then conveyed to the electrolytic cell, so that the recycling of cleaning solution resources is realized, and the device is more environment-friendly.
< electrolyte mixer >
The electrolyte mixer of the utility model has an inlet end and an outlet end. The electrolyte mixer can effectively mix the electrolyte. In certain embodiments, the electrolyte mixer may be an electrolyte heat exchanger; the electrolyte heat exchanger can be used for effectively mixing the electrolyte and adjusting the heat dissipation capacity of the electrolyte according to the requirement, so that the performance of the mixed electrolyte is more suitable for the electrolyte requirement of the electrolytic cell. The inlet end of the electrolyte mixer is respectively connected with the electrolyte outlet of the hydrogen separator and the electrolyte outlet of the oxygen separator. The electrolyte mixer effectively mixes the electrolyte from the hydrogen separator and the oxygen separator, and the electrolyte is introduced into the electrolytic bath through the circulating pump. This can prevent the concentration difference of the electrolytes in the cathode chamber and the anode chamber, improve the production stability, and further contribute to the improvement of the electrolysis efficiency.
< circulating Pump >
The utility model discloses a circulating pump has circulating pump entry and circulating pump export. The inlet of the circulating pump is connected with the outlet end of the electrolyte mixer, and the outlet of the circulating pump is connected with the electrolytic bath. This is advantageous in improving the efficiency of electrolyte delivery. The structure of the circulating pump is not particularly limited, and the function of the circulating pump of the present invention can be achieved.
The utility model realizes the zero polar distance mixed diaphragm water electrolysis hydrogen production. In the present invention, the structures of the hydrogen separator, the hydrogen scrubber, the oxygen separator, the oxygen scrubber, and the electrolyte mixer are not particularly limited, and those known in the art may be employed.
< balance tube >
The utility model discloses an equipment can also include balanced pipe. The balance pipe is respectively connected with an oxygen separator electrolyte outlet of the oxygen separator and a hydrogen separator electrolyte outlet of the hydrogen separator, and is used for balancing the liquid levels of the hydrogen separator and the oxygen separator.
< demineralized water Equipment >
In the utility model, the demineralized water equipment is used for purifying water, is mainly used for desalting and obtains the demineralized water. The demineralized water device has a demineralized water device outlet. In the present invention, the structure of the demineralized water apparatus is not particularly limited, and those known in the art may be employed.
< Charge Pump >
In the utility model, the purified water produced by the desalted water equipment can be respectively conveyed to the hydrogen scrubber and the oxygen scrubber through the feed pump.
The feed pump has a feed pump inlet and a feed pump outlet. The inlet of the feed pump is connected with the outlet of the desalted water equipment, and the outlet of the feed pump is respectively connected with the desalted water inlet of the hydrogen scrubber and the desalted water inlet of the oxygen scrubber. The desalted water device is used for introducing purified water, namely desalted water, into the hydrogen scrubber and the oxygen scrubber through the feed pump, so that hydrogen in the hydrogen scrubber is washed to remove alkali liquor, and oxygen in the oxygen scrubber is washed to remove alkali liquor. The utility model discloses in, the structure of charge pump does not have the special limitation, can realize the utility model discloses a charge pump function can, can adopt those that the field is common.
The use of the device of the present invention is described below: the demineralized water (i.e., purified water) is delivered to the hydrogen scrubber and the oxygen scrubber via the feed pumps; the washing liquid in the hydrogen washer flows automatically into the hydrogen separator; the scrubbing liquid in the oxygen scrubber flows automatically to the oxygen separator; hydrogen produced in the cathode chamber carries electrolyte (namely a mixture of the hydrogen and the electrolyte) to enter a hydrogen separator, the electrolyte automatically flows into an electrolyte mixer, the hydrogen enters a hydrogen scrubber and is discharged to hydrogen purification equipment from a scrubbing hydrogen outlet of the hydrogen scrubber; oxygen produced in the anode chamber entrains electrolyte (namely a mixture of the oxygen and the electrolyte) to enter an oxygen separator, the electrolyte automatically flows into an electrolyte mixer, the oxygen enters an oxygen scrubber and is discharged to oxygen purification equipment from a scrubbing oxygen outlet of the oxygen scrubber; the electrolytes from the hydrogen separator and the oxygen separator are effectively mixed in the electrolyte mixer and are conveyed to the electrolytic bath through the circulating pump.
Example 1
Fig. 1 is a schematic diagram of a water electrolysis hydrogen production device with a diaphragm according to the present invention. Fig. 2 is a partially enlarged view of fig. 1. FIG. 3 is a schematic view of the installation of the electrolytic cell of the present invention.
As shown in fig. 1, the water electrolysis hydrogen production apparatus with a membrane of the present embodiment includes an electrolytic bath 100, a hydrogen separator 210, an oxygen separator 220, a hydrogen scrubber 310, an oxygen scrubber 320, an electrolyte mixer 400, a circulation pump 500, a demineralized water device 600, a feed pump 700, a hydrogen purification device (not shown), and an oxygen purification device (not shown).
As shown in fig. 1, 2 and 3, the electrolytic cell 100 includes a cathode plate 110, a cathode expanded metal 120, a first gasket 161, a separator 130, a second gasket 162, an anode expanded metal 140 and an anode plate 150.
The separator 130 has a polytetrafluoroethylene porous membrane substrate layer and a perfluorosulfonic acid resin surface layer. The thickness of the separator 130 was 25 μm, and the pore diameter of the micropores was 200 nm. The diaphragm 130 is located between the first washer 161 and the second washer 162. In this embodiment, the first gasket 161 and the second gasket 162 are polytetrafluoroethylene square gaskets with openings in the middle.
The cathode expanded metal 120 is disposed between the cathode plate 110 and the first gasket 161, and both sides of the cathode expanded metal 120 are respectively disposed closely to the cathode plate 110 and the first gasket 161. The anode metal mesh 140 is disposed between the anode plate 150 and the second gasket 162, and two sides of the anode metal mesh 140 are respectively disposed to closely contact the anode plate 150 and the second gasket 162.
An anode chamber is formed between anode plate 150 and diaphragm 130, and the anode chamber contains an anolyte. An anode mesh 140 is located within the anode chamber. The anode chamber is communicated with an oxygen liquid outlet.
The cathode chamber and the anode chamber are respectively provided with a plurality of groups.
The electrolytic cell 100 has a hydrogen liquid outlet and an oxygen liquid outlet. The hydrogen liquid outlet discharges a mixture of hydrogen and electrolyte. The oxygen liquid outlet discharges the mixture of oxygen and electrolyte.
The hydrogen separator 210 has a hydrogen gas liquid inlet, a hydrogen gas outlet, a hydrogen separator electrolyte outlet, and a hydrogen separator wash liquid inlet. The hydrogen separator 210 separates hydrogen gas and electrolyte. The hydrogen liquid inlet is connected to the hydrogen liquid outlet of the electrolytic cell 100, i.e. the mixture of hydrogen and electrolyte generated by the electrolytic cell 100 enters the hydrogen separator 210.
The hydrogen scrubber 310 has a hydrogen gas inlet to be scrubbed, a hydrogen scrubber demineralized water inlet, a scrubbing hydrogen gas outlet, and a hydrogen scrubber scrubbing liquid outlet. The hydrogen inlet to be washed is connected to the hydrogen outlet of the hydrogen separator 210. The washing hydrogen outlet is connected with hydrogen purification equipment. The hydrogen scrubber scrubbing liquid outlet of the hydrogen scrubber 310 is connected to the hydrogen separator scrubbing liquid inlet of the hydrogen separator 210.
The oxygen separator 220 has an oxygen liquid inlet, an oxygen outlet, an oxygen separator electrolyte outlet, and an oxygen separator scrubbing liquid inlet. The oxygen separator 220 separates oxygen from the electrolyte. The oxygen liquid inlet is connected with the oxygen liquid outlet of the electrolytic bath 100.
The oxygen scrubber 320 has an oxygen to be scrubbed inlet, an oxygen scrubber demineralized water inlet, a scrubbing oxygen outlet, and an oxygen scrubber scrubbing liquid outlet. The inlet for oxygen to be washed is connected to the oxygen outlet of the oxygen separator 220. The washing oxygen outlet is connected with oxygen purification equipment. The oxygen scrubber wash outlet of the oxygen scrubber 320 is connected to the oxygen separator wash inlet of the oxygen separator 220.
The electrolyte mixer 400 has an inlet end and an outlet end. The inlet ends are connected to the hydrogen separator electrolyte outlet of the hydrogen separator 210 and the oxygen separator electrolyte outlet of the oxygen separator 220, respectively. The electrolytes from the hydrogen separator 210 and the oxygen separator 220 are efficiently mixed in the electrolyte mixer 400 and introduced into the electrolytic cell 100 through the circulation pump 500.
The circulation pump 500 has a circulation pump inlet and a circulation pump outlet. The inlet of the circulation pump is connected to the outlet end of the electrolyte mixer 400, and the outlet of the circulation pump is connected to the anode chamber and the cathode chamber.
The desalted water apparatus 600 purifies water to obtain desalted water. The demineralized water device 600 has a demineralized water device outlet.
The feed pump 700 has a feed pump inlet and a feed pump outlet. The feed pump inlet is connected to the demineralized water plant outlet, and the feed pump outlet is connected to the hydrogen scrubber demineralized water inlet of the hydrogen scrubber 310 and the oxygen scrubber demineralized water inlet of the oxygen scrubber 320, respectively. The demineralized water apparatus 600 introduces demineralized water into the hydrogen scrubber 310 and the oxygen scrubber 320 through the feed pump 700.
Example 2
The same as in example 1 except for the following settings:
the water electrolysis hydrogen production apparatus with a diaphragm of the present embodiment further includes a balance tube (not shown). The balancing pipe is connected to an oxygen separator electrolyte outlet of the oxygen separator 220 and a hydrogen separator electrolyte outlet of the hydrogen separator 210, respectively, for balancing a liquid level of the hydrogen separator 210 and a liquid level of the oxygen separator 220.
Example 3
The same as example 2 except for the following settings:
the separator 130 has a polytetrafluoroethylene porous membrane substrate layer and a sulfonated polyetheretherketone surface layer.
The present invention is not limited to the above embodiments, and any variations, modifications, and substitutions that may occur to those skilled in the art may be made without departing from the spirit of the present invention.
Claims (10)
1. A water electrolysis hydrogen production device with a diaphragm comprises an electrolytic bath, a hydrogen separator and an oxygen separator; the method is characterized in that:
the electrolytic bath comprises a cathode plate, a cathode metal net, a first gasket, a diaphragm, a second gasket, an anode metal net, an anode plate, a hydrogen liquid outlet and an oxygen liquid outlet;
the separator has a polytetrafluoroethylene porous membrane substrate layer and a perfluorosulfonic acid resin surface layer, or the separator has a polytetrafluoroethylene porous membrane substrate layer and a sulfonated polyether ether ketone surface layer; the diaphragm is arranged between the first gasket and the second gasket;
the cathode metal net is arranged between the cathode plate and the first gasket, and two sides of the cathode metal net are respectively arranged in a manner of clinging to the cathode plate and the first gasket; a cathode chamber is formed between the cathode plate and the diaphragm and is configured to contain a catholyte; the cathode chamber is communicated with a hydrogen liquid outlet;
the anode metal mesh is arranged between the anode plate and the second gasket, and two sides of the anode metal mesh are respectively arranged in a manner of clinging to the anode plate and the second gasket; an anode chamber is formed between the anode plate and the diaphragm and is configured to contain an anolyte; the anode chamber is communicated with an oxygen liquid outlet;
the hydrogen separator is provided with a hydrogen liquid inlet, a hydrogen outlet and a hydrogen separator electrolyte outlet, the hydrogen separator is used for separating hydrogen and electrolyte, and the hydrogen liquid inlet is connected with the hydrogen liquid outlet of the electrolytic cell;
the oxygen separator is provided with an oxygen liquid inlet, an oxygen outlet and an electrolyte outlet of the oxygen separator, the oxygen separator is used for separating oxygen and electrolyte, and the oxygen liquid inlet is connected with the oxygen liquid outlet of the electrolytic cell.
2. The device of claim 1, wherein the membrane has a thickness of 10 to 100 μm; the polytetrafluoroethylene porous membrane has micropores with a pore diameter of 100-2000 nm.
3. The apparatus of claim 1, further comprising a balancing pipe connected to the oxygen separator electrolyte outlet and the hydrogen separator electrolyte outlet, respectively, for balancing the liquid level of the hydrogen separator and the liquid level of the oxygen separator.
4. The apparatus of claim 1, further comprising an electrolyte mixer and a circulation pump, wherein,
the electrolyte mixer is provided with an inlet end and an outlet end, and the inlet end is respectively connected with the electrolyte outlet of the hydrogen separator and the electrolyte outlet of the oxygen separator;
the circulating pump is provided with a circulating pump inlet and a circulating pump outlet, the circulating pump inlet is connected with the outlet end of the electrolyte mixer, and the circulating pump outlet is connected with the electrolytic bath.
5. The apparatus of claim 4, further comprising a hydrogen scrubber and an oxygen scrubber;
the hydrogen scrubber is provided with a hydrogen inlet to be scrubbed, a desalted water inlet of the hydrogen scrubber and a scrubbing hydrogen outlet; the hydrogen inlet to be washed is connected with the hydrogen outlet of the hydrogen separator;
the oxygen scrubber is provided with an oxygen inlet to be scrubbed, an oxygen scrubber desalted water inlet and a scrubbing oxygen outlet; the oxygen inlet to be washed is connected with the oxygen outlet of the oxygen separator.
6. The apparatus of claim 5, further comprising a hydrogen purification device connected to the scrubbed hydrogen outlet of the hydrogen scrubber.
7. The apparatus of claim 6, further comprising an oxygen purification device connected to the scrubbed oxygen outlet of the oxygen scrubber.
8. The apparatus of claim 7, wherein:
the hydrogen scrubber also has a hydrogen scrubber scrubbing liquid outlet for discharging a scrubbing liquid generated by the hydrogen scrubber scrubbing hydrogen gas;
the oxygen scrubber also has an oxygen scrubber scrubbing liquid outlet for discharging scrubbing liquid produced by the oxygen scrubber scrubbing oxygen.
9. The apparatus of claim 8, wherein:
the hydrogen separator is also provided with a washing liquid inlet of the hydrogen separator, and the washing liquid inlet of the hydrogen separator is connected with the washing liquid outlet of the hydrogen scrubber;
the oxygen separator is also provided with an oxygen separator washing liquid inlet which is connected with the oxygen scrubber washing liquid outlet.
10. The apparatus of claim 9, further comprising a desalinated water unit and a feed pump;
the desalted water equipment is used for purifying water and is provided with a desalted water equipment outlet which is respectively connected with the desalted water inlet of the hydrogen scrubber and the desalted water inlet of the oxygen scrubber;
the feed pump is provided with a feed pump inlet and a feed pump outlet, the feed pump inlet is connected with the outlet of the desalted water equipment, and the feed pump outlet is respectively connected with the desalted water inlet of the hydrogen scrubber and the desalted water inlet of the oxygen scrubber.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832498A (en) * | 2021-10-13 | 2021-12-24 | 上海氢迈工程技术有限公司 | Detection device convenient for detecting performance of electrode or diaphragm in water electrolysis hydrogen production device |
| CN114086213A (en) * | 2021-10-27 | 2022-02-25 | 四川华能氢能科技有限公司 | Composite diaphragm for reducing energy consumption of hydrogen production by alkaline electrolysis of water |
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2021
- 2021-08-05 CN CN202121813791.1U patent/CN214361730U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832498A (en) * | 2021-10-13 | 2021-12-24 | 上海氢迈工程技术有限公司 | Detection device convenient for detecting performance of electrode or diaphragm in water electrolysis hydrogen production device |
| CN113832498B (en) * | 2021-10-13 | 2024-04-05 | 上海氢迈工程技术有限公司 | Detection device convenient for detecting electrode or diaphragm performance in water electrolysis hydrogen production device |
| CN114086213A (en) * | 2021-10-27 | 2022-02-25 | 四川华能氢能科技有限公司 | Composite diaphragm for reducing energy consumption of hydrogen production by alkaline electrolysis of water |
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