CN214032711U - Water electrolysis hydrogen production device - Google Patents
Water electrolysis hydrogen production device Download PDFInfo
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- CN214032711U CN214032711U CN202121130446.8U CN202121130446U CN214032711U CN 214032711 U CN214032711 U CN 214032711U CN 202121130446 U CN202121130446 U CN 202121130446U CN 214032711 U CN214032711 U CN 214032711U
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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
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Abstract
The utility model discloses a hydrogen production device by electrolyzing water. This electrolytic water hydrogen plant includes: the hydrogen side gas-liquid separator is arranged on the oxygen side of the electrolytic bath; the electrolytic cell is provided with a hydrogen liquid outlet, an oxygen liquid outlet, an anolyte inlet, a catholyte inlet and at least one group of electrolytic reactors; the hydrogen side gas-liquid separator is provided with a hydrogen liquid inlet and a hydrogen side electrolyte outlet; the oxygen side gas-liquid separator is provided with an oxygen liquid inlet and an oxygen side electrolyte outlet; the two ends of the first circulating pipe are respectively connected with the hydrogen side electrolyte outlet and the anode electrolyte inlet, the two ends of the second circulating pipe are respectively connected with the oxygen side electrolyte outlet and the cathode electrolyte inlet, one end of the balance pipe is connected with the first circulating pipe, and the other end of the balance pipe is connected with the second circulating pipe. The hydrogen production device by electrolyzing water can balance the concentration of the electrolyte in the cathode chamber and the anode chamber.
Description
Technical Field
The utility model relates to a hydrogen production device by electrolyzing water.
Background
Hydrogen energy is a recognized clean energy source, and has the advantages of light density, good thermal conductivity, good combustion performance and the like. Hydrogen energy is a secondary energy which is produced by using other energy sources through a certain method, and is not like coal, oil and natural gas which can be directly exploited. The commonly used industrial hydrogen production methods mainly comprise the hydrogen production by reforming natural gas steam, the hydrogen production by converting methanol steam, the hydrogen production by electrolyzing water and the hydrogen production by oxidizing and reforming hydrocarbons. Wherein, the hydrogen production process by electrolyzing water has higher maturity, and the purity of the produced hydrogen is high. The existing equipment for producing hydrogen by electrolyzing water mainly has two types: discrete and hybrid. The long-term use of the discrete water electrolysis hydrogen production equipment can lead the concentration of the anolyte in the electrolytic cell to be higher and higher, and the concentration of the catholyte to be lower and lower, thus leading the water electrolysis catalysis efficiency to be reduced. Although the mixed water electrolysis hydrogen production equipment can transfer the high-concentration electrolyte to the low-concentration area, the distribution is uniform, the material balance is not facilitated, and the problem of the catalytic efficiency cannot be solved.
CN213013112U discloses a comprehensive heat management system of a large alkaline electrolytic water hydrogen production device. The comprehensive heat management system comprises an electrolytic bath, a hydrogen side gas-liquid separator, an oxygen side gas-liquid separator, an alkali liquor filter and an alkali liquor circulating pump. The electrolytic bath is connected with a hydrogen side gas-liquid separator and an oxygen side gas-liquid separator respectively. The alkali liquor output ends of the hydrogen side gas-liquid separator and the oxygen side gas-liquid separator are mixed through an alkali liquor filter and return to the electrolytic tank through an alkali liquor circulating pump. The device can not solve the problem of electrolyte concentration balance in the anode chamber and the cathode chamber.
CN211530761U discloses a wind-abandoning water electrolysis hydrogen production coupling coal-fired power generation system. The system comprises an electrolytic bath, a hydrogen separator, an oxygen separator and an alkali liquor circulating pump. The electrolytic cell is connected with the hydrogen separator and the oxygen separator respectively. The alkali liquor obtained by the separation of the hydrogen separator and the oxygen separator is mixed and returned to the electrolytic tank through an alkali liquor circulating pump. The device can not solve the problem of electrolyte concentration balance in the anode chamber and the cathode chamber.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an electrolytic water hydrogen plant, the device can make the electrolyte concentration in cathode chamber and the positive pole indoor balanced.
The utility model provides an electrolytic water hydrogen plant, include: the hydrogen side gas-liquid separator is arranged on the oxygen side of the electrolytic bath;
the electrolytic cell is provided with a hydrogen liquid outlet, an oxygen liquid outlet, an anolyte inlet, a catholyte inlet and at least one group of electrolytic reactors; the electrolytic reactor is provided with a cathode chamber and an anode chamber, and is configured to electrolyze a hydrogen-side electrolyte to form a gas-liquid mixture containing hydrogen gas, and electrolyze an oxygen-side electrolyte to form a gas-liquid mixture containing oxygen gas; the oxygen liquid outlet is connected with the anode chamber and is used for discharging a gas-liquid mixture containing oxygen out of the electrolytic cell; the hydrogen gas liquid outlet is connected with the cathode chamber and is arranged to discharge a gas-liquid mixture containing hydrogen gas out of the electrolytic cell; the anolyte inlet is connected to the anode chamber and is configured to supply a hydrogen side electrolyte to the anode chamber; the catholyte inlet is connected to the cathode chamber and configured to supply oxygen-side electrolyte to the cathode chamber;
the hydrogen side gas-liquid separator is provided with a hydrogen liquid inlet and a hydrogen side electrolyte outlet, the hydrogen liquid inlet is connected with the hydrogen liquid outlet of the electrolytic cell, and the hydrogen side gas-liquid separator is used for separating a gas-liquid mixture containing hydrogen to form a hydrogen side mixed solution and hydrogen to be purified, and enabling the hydrogen side mixed solution to form a hydrogen side electrolyte;
the oxygen side gas-liquid separator is provided with an oxygen liquid inlet and an oxygen side electrolyte outlet, the oxygen liquid inlet is connected with the oxygen liquid outlet of the electrolytic cell, the oxygen side gas-liquid separator is used for separating a gas-liquid mixture containing oxygen to form an oxygen side mixed solution and oxygen to be purified, and the oxygen side mixed solution is made to form an oxygen side electrolyte;
the two ends of the first circulating pipe are respectively connected with the hydrogen-side electrolyte outlet and the anode electrolyte inlet and are used for conveying the hydrogen-side electrolyte to the anode electrolyte inlet;
the two ends of the second circulation pipe are respectively connected with the oxygen-side electrolyte outlet and the cathode electrolyte inlet and are used for conveying the oxygen-side electrolyte to the cathode electrolyte inlet;
one end of the balance pipe is connected with the first circulation pipe, the other end of the balance pipe is connected with the second circulation pipe, and the balance pipe is used for balancing the liquid levels of the hydrogen side gas-liquid separator and the oxygen side gas-liquid separator.
According to the utility model discloses an electrolytic water hydrogen plant, preferably, the balance pipe sets up the first circulating pipe is close to hydrogen side vapour and liquid separator's one end with the second circulating pipe is close to oxygen side vapour and liquid separator's one end, the balance pipe with hydrogen side vapour and liquid separator with oxygen side vapour and liquid separator parallels.
According to the hydrogen production device by electrolyzing water of the utility model, preferably, the first circulating pipe is provided with a first feeding pump, and the first feeding pump is set to control the amount of the electrolyte at the hydrogen side delivered to the electrolytic bath, so as to control the liquid level of the gas-liquid separator at the hydrogen side; and a second feeding pump is arranged on the second circulating pipe and is used for controlling the amount of the electrolyte at the oxygen side conveyed to the electrolytic cell so as to control the liquid level of the gas-liquid separator at the oxygen side.
According to the water electrolysis hydrogen production device of the utility model, preferably, the water electrolysis hydrogen production device further comprises a hydrogen side scrubber and an oxygen side scrubber;
the hydrogen side gas-liquid separator is also provided with a hydrogen gas outlet to be purified and a hydrogen side washing liquid inlet, and the oxygen side gas-liquid separator is also provided with an oxygen gas outlet to be purified and an oxygen side washing liquid inlet;
the hydrogen side scrubber is provided with a hydrogen inlet to be purified, a hydrogen outlet and a hydrogen side scrubbing liquid outlet; the hydrogen inlet to be purified is connected with the hydrogen outlet to be purified of the hydrogen-side gas-liquid separator, and the hydrogen-side washing liquid outlet is connected with the hydrogen-side washing liquid inlet of the hydrogen-side gas-liquid separator; the hydrogen side scrubber is configured to scrub hydrogen gas to be purified to form hydrogen gas and a hydrogen side scrubbing solution;
the oxygen side scrubber is provided with an oxygen inlet to be purified, an oxygen outlet and an oxygen side scrubbing liquid outlet; the to-be-purified oxygen inlet is connected with the to-be-purified oxygen outlet of the oxygen side gas-liquid separator, and the oxygen side washing liquid outlet is connected with the oxygen side washing liquid inlet of the oxygen side gas-liquid separator; the oxygen side scrubber is configured to scrub the oxygen to be purified to form oxygen and an oxygen side scrubbing liquid.
According to the water electrolysis hydrogen production device of the utility model, preferably, the water electrolysis hydrogen production device also comprises a desalting water tank and a water supply pump;
the desalting water tank is respectively connected with the hydrogen side scrubber and the oxygen side scrubber through the water supply pump; the demineralized water tank is configured to supply demineralized water to the hydrogen side scrubber and the oxygen side scrubber; the water supply pump is configured to control the supply amount of the demineralized water, thereby controlling the liquid levels of the hydrogen-side gas-liquid separator and the oxygen-side gas-liquid separator.
According to the hydrogen production device by electrolyzing water, the electrolysis reactor preferably comprises a cation exchange membrane, a cathode plate and an anode plate;
the cathode plate and the anode plate are arranged in parallel and opposite to each other, and the cation exchange membrane is arranged between the cathode plate and the anode plate; a cathode chamber is formed between the cathode plate and the cation exchange membrane, and an anode chamber is formed between the anode plate and the cation exchange membrane.
According to the hydrogen production device by electrolyzing water of the utility model, preferably, the electrolysis reactor also comprises an anode metal net and a cathode metal net;
the anode metal mesh is arranged between the anode plate and the cation exchange membrane and is in contact with the cation exchange membrane and the anode plate;
the cathode metal mesh is arranged between the cathode plate and the cation exchange membrane and is in contact with the cation exchange membrane and the cathode plate.
According to the hydrogen production device by electrolyzing water of the utility model, preferably, the electrolytic bath also comprises an end pressure plate, a middle pole frame, an end pole frame and a plurality of groups of electrolytic reactors;
the end pressure plates are arranged at two ends of the electrolytic cell, the middle pole frame is arranged between the two adjacent groups of electrolytic reactors, and the end pole frame is arranged between the electrolytic reactors at the two ends and the end pressure plates.
According to the hydrogen production device by electrolyzing water of the utility model, preferably, the electrolytic bath is provided with an oxygen pole frame and a hydrogen pole frame;
the oxygen electrode frame is arranged at the upper end and the lower end of the anode chamber, and the hydrogen electrode frame is arranged at the upper end and the lower end of the cathode chamber.
According to the utility model discloses an electrolytic water hydrogen plant, preferably, the electrolysis trough still is provided with the insulation board, the insulation board sets up the end clamp plate with between the end utmost point frame.
The water electrolysis hydrogen production device is provided with the first circulating pipe and the second circulating pipe, which can lead the electrolyte in the cathode chamber and the electrolyte in the anode chamber to be in cross circulation; the balance pipe can control the liquid levels of the hydrogen side gas-liquid separator and the oxygen side gas-liquid separator, so that the liquid levels of the hydrogen side gas-liquid separator and the oxygen side gas-liquid separator are balanced. This promotes the balance of electrolyte concentrations in the cathode chamber and the anode chamber, and improves the catalytic efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a water electrolysis hydrogen production device of the utility model.
Fig. 2 is a schematic structural diagram of an electrolytic cell of the water electrolysis hydrogen production device of the utility model.
FIG. 3 is an enlarged view of a portion of the electrolytic reactor of the electrolytic cell shown in FIG. 2.
The reference numerals are explained below:
1-an electrolytic cell; 111-a first end platen; 112-a second end platen; 12-an electrolytic reactor; 121-cathode plate; 122-a cathode metal mesh; 123-cation exchange membrane; 124-anode metal mesh; 125-an anode plate; 13-middle pole frame; 14-terminal frame; 15-oxygen frame; 16-a hydrogen electrode frame; 17-an insulating plate; 18-a first gas-liquid channel; 19-a third gas-liquid channel; 20-a hydrogen liquid outlet; 21-hydrogen side gas-liquid separator; 22-oxygen side gas-liquid separator; 31-a first circulation duct; 32-a second circulation pipe; 4-a balance tube; 51-a first feed pump; 52-a second feed pump; 61-hydrogen side scrubber; 62-oxygen side scrubber; 7-a demineralized water tank; 8-water supply pump.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto.
The utility model discloses an electrolytic water hydrogen manufacturing device includes electrolysis trough, hydrogen side vapour and liquid separator, oxygen side vapour and liquid separator, first circulating pipe, second circulating pipe and balance pipe. In certain embodiments, the electrolytic water hydrogen plant further comprises one or more of a hydrogen side scrubber, an oxygen side scrubber, a demineralized water tank, and a feed water pump.
Electrolytic cell
The utility model discloses an electrolysis trough includes hydrogen gas liquid export, oxygen gas liquid export, anolyte entry, catholyte entry and at least a set of electrolytic reactor. In certain embodiments, the electrolytic cell of the present invention may further comprise one or more of an end pressure plate, an insulation plate, an end frame, a middle frame, an oxygen frame, a hydrogen frame, and a gas-liquid channel.
The utility model discloses an electrolytic reactor is provided with cathode chamber and anode chamber, and it sets up to form the gas-liquid mixture who contains hydrogen and the gas-liquid mixture who contains oxygen with electrolyte. The electrolyte may be an aqueous solution containing an alkali metal hydroxide. For example, an aqueous solution of sodium hydroxide or an aqueous solution of potassium hydroxide may be used. In certain embodiments, the electrolytic reactor comprises a cathode plate, a cation exchange membrane, and an anode plate. The anode plate and the cathode plate are oppositely and parallelly arranged. The cation exchange membrane is disposed between the anode plate and the cathode plate. The cation exchange membrane is respectively parallel to the anode plate and the cathode plate. A cathode chamber is formed between the cathode plate and the cation exchange membrane. An anode chamber is formed between the anode plate and the cation exchange membrane. The kind of the cation exchange membrane is not limited, and a perfluorosulfonic acid cation exchange membrane is preferable. Thus avoiding the explosion safety accident caused by the crossing of the hydrogen and the oxygen to a greater extent. Preferably, the electrolytic reactor further comprises an anode metal mesh and a cathode metal mesh. The anode metal mesh is arranged between the anode plate and the cation exchange membrane. Two ends of the anode metal mesh are respectively abutted with the anode plate and the cation exchange membrane. The cathode metal net is arranged between the cathode plate and the cation exchange membrane. The two ends of the cathode metal net are respectively abutted with the cathode plate and the cation exchange membrane. Thus, the zero polar distance electrolytic cell is formed, the resistance of the electrolytic cell is reduced, and the effects of energy conservation and consumption reduction are achieved.
A hydrogen gas liquid outlet for discharging a gas-liquid mixture containing hydrogen gas out of the electrolytic cell. The hydrogen liquid outlet is connected with the cathode chamber. According to one embodiment of the present invention, the hydrogen gas liquid outlet is connected to the cathode chamber through a second gas-liquid passage. The hydrogen gas liquid outlet may be provided at the top of the electrolytic cell.
An oxygen liquid outlet for discharging the oxygen-containing gas-liquid mixture out of the electrolytic cell. The oxygen liquid outlet is connected with the anode chamber. According to one embodiment of the present invention, the oxygen-liquid outlet is connected to the anode chamber through a first gas-liquid passage. The oxygen liquid outlet may be provided at the top of the electrolysis cell.
And an anolyte inlet for delivering the hydrogen-side electrolyte formed in the hydrogen-side gas-liquid separator to the anode chamber. The anolyte inlet is connected to the anode chamber. According to one embodiment of the present invention, the anolyte inlet is connected to the anode chamber through a third gas-liquid channel. The anolyte inlet may be provided in the lower part of the cell.
A catholyte inlet for delivering the oxygen-side electrolyte formed in the oxygen-side gas-liquid separator to the cathode compartment. The catholyte inlet is connected to the cathode chamber. According to one embodiment of the invention, the catholyte inlet is connected to the cathode chamber through a fourth gas-liquid channel. The catholyte inlet may be provided in a lower portion of the cell.
In certain embodiments, the electrolysis reactors are arranged in at least two groups. For example, the electrolytic reactors may be arranged in three groups, four groups, five groups, six groups, and the like. The middle pole frame is arranged between the two adjacent groups of electrolytic reactors. The oxygen pole frames are arranged at the upper end and the lower end of the anode chamber. The hydrogen electrode frames are arranged at the upper end and the lower end of the cathode chamber. The end pressing plates are arranged into two groups which are respectively arranged at two ends of the electrolytic cell. The end pole frame is arranged between the end electrolysis reactor and the end pressure plate. The insulation board is arranged between the end pole frame and the end pressure plate.
The two sets of end pressure plates may be a first end pressure plate and a second end pressure plate, respectively. The first end pressing plate and the second end pressing plate can be correspondingly provided with screw holes. The first end pressure plate and the second end pressure plate are fastened through bolts. According to one embodiment of the invention, the tie bolts extend through the space between the first end pressure plate and the second end pressure plate and extend out of the threaded holes in the first end pressure plate and the second end pressure plate. The tensioning bolt is fixed with the first end pressure plate and the second end pressure plate through the nut and the belleville spring.
Four sets of gas-liquid channels can be arranged, namely a first gas-liquid channel, a second gas-liquid channel, a third gas-liquid channel and a fourth gas-liquid channel. The first gas-liquid channel is connected with the anode chambers of the electrolytic reactors and is connected with the oxygen-liquid outlet. The first gas-liquid channel is arranged to combine the gas-liquid mixture containing oxygen generated in the plurality of electrolysis reactors and discharge the gas-liquid mixture out of the electrolysis cell from the oxygen-liquid outlet. The second gas-liquid channel is connected with the cathode chambers of the electrolytic reactors and is connected with the hydrogen liquid outlet. The second gas-liquid passage is provided to join the gas-liquid mixture containing hydrogen gas produced in the plurality of electrolytic reactors and to discharge the gas-liquid mixture from the hydrogen gas liquid outlet out of the electrolytic cell. The third gas-liquid channel is connected with the anode chambers of the electrolytic reactors and is connected with the anolyte inlet. The third gas-liquid channel is configured to deliver the hydrogen-side electrolyte to the anode chambers of the respective electrolytic reactors. The fourth gas-liquid channel is connected with the cathode chamber of each electrolytic reactor and is connected with the cathode electrolyte inlet. The fourth gas-liquid channel is provided to deliver the oxygen-side electrolyte to the cathode chamber of each electrolytic reactor.
Hydrogen side gas-liquid separator
The hydrogen-side gas-liquid separator is configured to separate a gas-liquid mixture containing hydrogen gas to form a hydrogen-side mixed liquid and hydrogen gas to be purified, and to make the hydrogen-side mixed liquid form a hydrogen-side electrolyte. The hydrogen-side gas-liquid separator is provided with a hydrogen-liquid inlet and a hydrogen-side electrolyte outlet. The hydrogen liquid inlet is connected with the hydrogen liquid outlet of the electrolytic cell. And the gas-liquid mixture containing the hydrogen enters the hydrogen-side gas-liquid separator through the hydrogen liquid inlet to form hydrogen-side mixed liquid and hydrogen to be purified. The hydrogen side electrolyte outlet is connected to the anolyte inlet of the cell. The hydrogen side mixed liquid is mixed with a hydrogen side scrubbing liquid from the hydrogen side scrubber to form a hydrogen side electrolyte. The hydrogen side electrolyte exits the hydrogen side gas-liquid separator through a hydrogen side electrolyte outlet.
The hydrogen-side gas-liquid separator may also be provided with an outlet for hydrogen gas to be purified and an inlet for hydrogen-side scrubbing liquid. The hydrogen outlet to be purified is used for discharging the hydrogen to be purified out of the hydrogen-side gas-liquid separator. The hydrogen gas outlet to be purified may be connected to the hydrogen gas inlet to be purified of the hydrogen side scrubber. According to one embodiment of the present invention, the hydrogen gas outlet to be purified is provided at the top of the hydrogen-side gas-liquid separator. The hydrogen side wash inlet is for receiving hydrogen side wash from the hydrogen side scrubber. The hydrogen side mixed liquor is mixed with the hydrogen side scrubbing solution to form a hydrogen side electrolyte. The hydrogen side wash inlet may be connected to a hydrogen side wash outlet of the hydrogen side scrubber.
Oxygen side gas-liquid separator
The oxygen-side gas-liquid separator is configured to separate a gas-liquid mixture containing oxygen gas to form an oxygen-side mixed liquid and the oxygen gas to be purified, and to cause the oxygen-side mixed liquid to form an oxygen-side electrolyte. The oxygen side gas-liquid separator is provided with an oxygen liquid inlet and an oxygen side electrolyte outlet. The oxygen liquid inlet is connected with the oxygen liquid outlet of the electrolytic cell. And the gas-liquid mixture containing the oxygen enters the oxygen side gas-liquid separator through the oxygen liquid inlet to form oxygen side mixed liquid and the oxygen to be purified. The oxygen side electrolyte outlet is connected to the catholyte inlet of the electrolysis cell. The oxygen side mixed liquor is mixed with the oxygen side scrubbing liquor from the oxygen side scrubber to form an oxygen side electrolyte. The oxygen-side electrolyte exits the oxygen-side gas-liquid separator through an oxygen-side electrolyte outlet.
The oxygen-side gas-liquid separator may also be provided with an outlet for oxygen to be purified and an inlet for an oxygen-side washing liquid. The to-be-purified oxygen outlet is used for discharging the to-be-purified oxygen out of the oxygen-side gas-liquid separator. The outlet for oxygen to be purified may be connected to the inlet for oxygen to be purified of the oxygen side scrubber. According to one embodiment of the invention, the outlet for oxygen to be purified is arranged at the top of the oxygen side gas-liquid separator. The oxygen side wash inlet is for receiving an oxygen side wash from the oxygen side scrubber. The oxygen side mixed liquor is mixed with the oxygen side washing liquor to form oxygen side electrolyte. The oxygen side wash inlet may be connected to the oxygen side wash outlet of the oxygen side scrubber.
First circulation pipe
Both ends of the first circulation pipe are connected to a hydrogen-side electrolyte outlet and an anolyte inlet, respectively, for conveying the hydrogen-side electrolyte to the anolyte inlet. In certain embodiments, a first feed pump is disposed on the first circulation conduit. The first feed pump is used for controlling the amount of the electrolyte on the hydrogen side conveyed to the electrolytic cell, so that the liquid level of the gas-liquid separator on the hydrogen side is controlled.
Second circulation pipe
The second circulation pipe has both ends connected to the oxygen-side electrolyte outlet and the catholyte inlet, respectively, for delivering the oxygen-side electrolyte to the catholyte inlet. In certain embodiments, a second feed pump is provided on the second circulation conduit. The second feed pump is used for controlling the amount of the electrolyte at the oxygen side conveyed to the electrolytic bath, so that the liquid level of the gas-liquid separator at the oxygen side is controlled.
Balance tube
One end of the balance pipe is connected with the first circulation pipe, and the other end of the balance pipe is connected with the second circulation pipe. The balance tube is used for balancing the liquid levels of the hydrogen-side gas-liquid separator and the oxygen-side gas-liquid separator. In some embodiments, the equilibrium tube is disposed at an end of the first circulation tube near the hydrogen-side gas-liquid separator and at an end of the second circulation tube near the oxygen-side gas-liquid separator. The balance tube is parallel to the hydrogen-side gas-liquid separator and the oxygen-side gas-liquid separator.
Hydrogen side scrubber
The hydrogen side scrubber is configured to scrub the hydrogen gas to be purified to form hydrogen gas and a hydrogen side scrub solution. The hydrogen side scrubber is provided with an inlet for hydrogen to be purified, a hydrogen outlet and an outlet for hydrogen side scrubbing liquid. And the inlet of the hydrogen to be purified is connected with the outlet of the hydrogen to be purified of the hydrogen side gas-liquid separator. The hydrogen to be purified passes through a hydrogen side scrubber to form hydrogen and a hydrogen side scrubbing solution. The hydrogen outlet is configured to discharge hydrogen out of the hydrogen-side scrubber. The hydrogen-side scrubbing liquid outlet is configured to discharge the hydrogen-side scrubbing liquid out of the hydrogen-side scrubber. In certain embodiments, the hydrogen-side scrubbing liquid outlet is connected to the hydrogen-side scrubbing liquid inlet of the hydrogen-side gas-liquid separator. The hydrogen side washing liquid enters the hydrogen side gas-liquid separator through a hydrogen side washing liquid outlet to form hydrogen side electrolyte with the hydrogen side mixed liquid.
The hydrogen side scrubber may also be provided with a demineralized water inlet. The demineralized water inlet is configured to supply demineralized water to the hydrogen-side scrubber. The demineralized water is used to wash the hydrogen to be purified.
Oxygen side scrubber
The oxygen side scrubber is configured to scrub the oxygen to be purified to form oxygen and an oxygen side scrubbing liquid. The oxygen side scrubber is provided with an oxygen inlet to be purified, an oxygen outlet and an oxygen side scrubbing liquid outlet. The inlet of the oxygen to be purified is connected with the outlet of the oxygen side gas-liquid separator. The oxygen to be purified passes through an oxygen side scrubber to form oxygen and an oxygen side scrubber liquor. The oxygen outlet is configured to discharge oxygen out of the oxygen side scrubber. The oxygen side wash outlet is configured to discharge the oxygen side wash out of the oxygen side scrubber. In certain embodiments, the oxygen-side wash outlet is connected to the oxygen-side wash inlet of the oxygen-side gas-liquid separator. And the oxygen side washing liquid enters the oxygen side gas-liquid separator through the hydrogen side washing liquid outlet to form oxygen side electrolyte with the oxygen side mixed liquid.
The oxygen side scrubber may also be provided with a demineralized water inlet. The demineralized water inlet is configured to supply demineralized water to the oxygen side scrubber. The demineralized water is used to wash the oxygen to be purified.
Demineralized water tank and water supply pump
The demineralized water tank is connected to the hydrogen side scrubber and the oxygen side scrubber, respectively, and is configured to supply demineralized water to the hydrogen side scrubber and the oxygen side scrubber. In some embodiments, a water supply pump is disposed on a pipeline connecting the demineralized water tank with the hydrogen-side scrubber and the oxygen-side scrubber, and the water supply pump is used for controlling the injection amount of the demineralized water, so as to control the liquid levels of the hydrogen-side gas-liquid separator and the oxygen-side gas-liquid separator.
Example 1
Fig. 1 is a schematic structural diagram of a water electrolysis hydrogen production device of the utility model. As shown in fig. 1, the electrolytic water hydrogen production apparatus of the present embodiment includes an electrolytic tank 1, a hydrogen-side gas-liquid separator 21, an oxygen-side gas-liquid separator 22, a first circulation pipe 31, a second circulation pipe 32, a balance pipe 4, a first feed pump 51, a second feed pump 52, a hydrogen-side scrubber 61, an oxygen-side scrubber 62, a demineralized water tank 7, and a water supply pump 8.
The electrolytic cell 1 includes an electrolytic reactor 12, a hydrogen gas liquid outlet (not shown), and an oxygen gas liquid outlet (not shown). The electrolytic reactor 12 includes a cathode plate 121, a cathode expanded metal 122, a cation exchange membrane 123, an anode expanded metal 124, and an anode plate 125. Cathode plate 121 and anode plate 125 are disposed parallel and opposite. The cation exchange membrane 123 is disposed between the cathode plate 121 and the anode plate 125 and is parallel to the cathode plate 121 and the anode plate 125, respectively. A cathode chamber is formed between the cathode plate 121 and the cation exchange membrane 123. An anode chamber is formed between the anode plate 125 and the cation exchange membrane 123. The cathode metal mesh 122 is disposed between the cathode plate 121 and the cation exchange membrane 123, and is in contact with the cathode plate 121 and the cation exchange membrane 123. The anode metal mesh 124 is disposed between the anode plate 125 and the cation exchange membrane 123, and is in contact with the anode plate 125 and the cation exchange membrane 123. The electrolytic reactor 12 electrolyzes the electrolyte and generates a gas-liquid mixture containing oxygen in the anode chamber and hydrogen in the cathode chamber. A hydrogen gas-liquid outlet (not shown) is connected to the cathode chamber and discharges a gas-liquid mixture containing hydrogen gas out of the electrolytic cell 1. An oxygen-liquid outlet (not shown) is connected to the anode chamber for discharging the gas-liquid mixture containing oxygen out of the electrolytic cell 1.
The hydrogen-side gas-liquid separator 21 is provided with a hydrogen liquid inlet connected to a hydrogen liquid outlet of the electrolytic bath 1. The hydrogen-side gas-liquid separator 21 separates a gas-liquid mixture containing hydrogen gas to form a hydrogen-side mixed liquid and hydrogen gas to be purified.
The oxygen-side gas-liquid separator 22 is provided with an oxygen-liquid inlet connected to an oxygen-liquid outlet of the electrolytic bath 1. The oxygen-side gas-liquid separator 22 separates a gas-liquid mixture containing oxygen gas to form an oxygen-side mixed liquid and oxygen gas to be purified.
The hydrogen side scrubber 61 is used to scrub the hydrogen gas to be purified, forming hydrogen gas and a hydrogen side scrubbing solution. The hydrogen side scrubber 9 is provided with an inlet for hydrogen gas to be purified, a hydrogen gas outlet, and a hydrogen side scrubber liquid outlet. The hydrogen-side gas-liquid separator 21 is also provided with an outlet for hydrogen gas to be purified and an inlet for a hydrogen-side washing liquid. The hydrogen inlet to be purified is connected with the hydrogen outlet to be purified. The hydrogen side scrubbing liquid outlet is connected with the hydrogen side scrubbing liquid inlet. The hydrogen-side washing liquid is sent to the hydrogen-side gas-liquid separator 21 and mixed with the hydrogen-side mixed liquid in the hydrogen-side gas-liquid separator 21 to form a hydrogen-side electrolyte.
The oxygen side scrubber 62 is used to scrub the oxygen to be purified, forming oxygen and an oxygen side scrubbing solution. The oxygen side scrubber 62 is provided with an inlet for oxygen to be purified, an oxygen outlet and an outlet for oxygen side scrubbing liquid. The oxygen-side gas-liquid separator 22 is also provided with an outlet for oxygen to be purified and an inlet for an oxygen-side washing liquid. The oxygen inlet to be purified is connected with the oxygen outlet to be purified. The oxygen side washing liquid outlet is connected with the oxygen side washing liquid inlet. The oxygen-side washing liquid is sent to the oxygen-side gas-liquid separator 22 and mixed with the oxygen-side mixed liquid in the oxygen-side gas-liquid separator 22 to form an oxygen-side electrolytic solution.
The demineralized water tank 7 is connected to a hydrogen-side scrubber 61 and an oxygen-side scrubber 62, respectively, by a water supply pump 8. The demineralized water tank 7 supplies demineralized water to the hydrogen-side scrubber 61 and the oxygen-side scrubber 62. The water feed pump 8 controls the supply amount of the demineralized water, thereby controlling the liquid levels of the hydrogen-side gas-liquid separator 21 and the oxygen-side gas-liquid separator 22.
The hydrogen-side gas-liquid separator 21 is also provided with a hydrogen-side electrolyte outlet. The cell 1 is also provided with an anolyte inlet. The anolyte inlet is connected to the anode chamber. One end of the first circulation pipe 31 is connected to the hydrogen-side electrolyte outlet, and the other end of the first circulation pipe 31 is connected to the anolyte inlet. The first circulation pipe 31 transports the hydrogen-side electrolyte in the hydrogen-side gas-liquid separator 21 to the anode electrolyte inlet.
A first feed pump 51 is provided on the first circulation pipe 31, which controls the amount of the hydrogen-side electrolyte delivered to the anode electrolyte inlet, thereby controlling the liquid level of the hydrogen-side gas-liquid separator 21.
The oxygen-side gas-liquid separator 22 is also provided with an oxygen-side electrolyte outlet. The cell 1 is also provided with a catholyte inlet. The catholyte inlet is connected to the cathode chamber. One end of the second circulation pipe 32 is connected to the oxygen side electrolyte outlet, and the other end of the second circulation pipe 32 is connected to the catholyte outlet. The second circulation pipe 32 transports the oxygen-side electrolyte in the oxygen-side gas-liquid separator 22 to the cathode electrolyte inlet.
A second feed pump 52 is provided on the second circulation pipe 32, which controls the amount of oxygen side electrolyte delivered to the cathode electrolyte inlet, thereby controlling the liquid level of the oxygen side gas-liquid separator 22.
One end of the equalizing pipe 4 is connected to one end of the first circulating pipe 31 near the hydrogen-side gas-liquid separator 21, and the other end of the equalizing pipe 4 is connected to one end of the second circulating pipe 32 near the oxygen-side gas-liquid separator 22. The equilibrium tube 4 is in parallel with the hydrogen-side gas-liquid separator 21 and the oxygen-side gas-liquid separator 22, respectively. The equilibrium tube 4 balances the liquid levels of the hydrogen-side gas-liquid separator 21 and the oxygen-side gas-liquid separator 22.
Example 2
The same procedure as in example 1 was repeated except that the structure of the electrolytic cell 1 was as shown in FIG. 2:
fig. 2 is a schematic structural diagram of an electrolytic cell of the water electrolysis hydrogen production device of the utility model. The electrolytic cell 1 of the present embodiment includes an end platen, a plurality of electrolytic reactors 12, an intermediate electrode frame 13, an end electrode frame 14, an oxygen electrode frame 15, a hydrogen electrode frame 16, an insulating plate 17, a first gas-liquid passage 18, a second gas-liquid passage (not shown), a third gas-liquid passage 19, a fourth gas-liquid passage (not shown), a hydrogen-liquid outlet 20, an oxygen-liquid outlet (not shown), an anolyte inlet (not shown), and a catholyte inlet (not shown).
Fig. 3 is a partially enlarged view of the electrolytic reactor 12 shown in fig. 2. As shown in fig. 3, the electrolytic reactor 12 includes a cathode plate 121, a cathode expanded metal 122, a cation exchange membrane 123, an anode expanded metal 124, and an anode plate 125. Cathode plate 121 and anode plate 125 are disposed parallel and opposite. The cation exchange membrane 123 is disposed between the cathode plate 121 and the anode plate 125 and is parallel to the cathode plate 121 and the anode plate 125, respectively. A cathode chamber is formed between the cathode plate 121 and the cation exchange membrane 123. An anode chamber is formed between the anode plate 125 and the cation exchange membrane 123. The cathode metal mesh 122 is disposed between the cathode plate 121 and the cation exchange membrane 123, and is in contact with the cathode plate 121 and the cation exchange membrane 123. The anode metal mesh 123 is disposed between the anode plate 125 and the cation exchange membrane 123, and is in contact with the anode plate 125 and the cation exchange membrane 123. The electrolytic reactor 12 electrolyzes the electrolyte and generates a gas-liquid mixture containing oxygen in the anode chamber and hydrogen in the cathode chamber.
The middle pole frame 13 is disposed between the adjacent two electrolytic reactors 12. Oxygen electrode frames 15 are respectively arranged at the upper and lower ends of the anode chamber. The upper and lower ends of the cathode chamber are respectively provided with a hydrogen electrode frame 16.
The number of the end pressing plates is two, namely a first end pressing plate 111 and a second end pressing plate 112 which are respectively arranged at two ends of the electrolytic cell 1. An insulating plate 17 and an end frame 14 are arranged between the end pressure plate and the electrolysis reactor 12 arranged at the end. One side of the insulating plate 17 is in contact with one side of the end frame 14. The other side of the insulating plate 17 is in contact with the end press plate 11. The other side of the end frame 10 is in contact with the electrolytic reactor 12.
The first end pressing plate 111 and the second end pressing plate 112 are correspondingly provided with screw holes. The tension bolts extend through the space between the first end pressing plate 111 and the second end pressing plate 112 and protrude from screw holes formed in the first end pressing plate 111 and the second end pressing plate 112. The tension bolts are fixed to the first end pressing plate 111 and the second end pressing plate 112 by nuts and belleville springs.
The hydrogen gas liquid outlet 20 is provided at the upper part of the electrolytic cell 1, and discharges the gas-liquid mixture containing hydrogen gas generated in the electrolytic cell 1 to the electrolytic cell. An oxygen-liquid outlet (not shown) is provided at the upper part of the electrolytic cell 1, and discharges the oxygen-containing gas-liquid mixture generated in the electrolytic cell out of the electrolytic cell.
The first gas-liquid channel 18 is connected to the anode chamber of each electrolytic reactor 12 and to the oxygen-liquid outlet. The gas-liquid mixture containing oxygen gas produced in each of the electrolytic reactors 12 is merged through the first gas-liquid passage 18 and discharged out of the electrolytic cell through the oxygen gas-liquid outlet.
A second gas-liquid channel (not shown) is connected to the cathode chamber of each electrolytic reactor 12 and to the hydrogen gas liquid outlet 20. The gas-liquid mixture containing hydrogen gas produced in each electrolytic reactor 12 is merged via a second gas-liquid passage (not shown) and discharged from the electrolytic cell through a hydrogen gas liquid outlet 20.
An anolyte inlet (not shown) is provided at the lower part of the electrolytic cell 1, which delivers the hydrogen-side electrolyte to the electrolytic cell 1. A catholyte inlet (not shown) is provided in the lower part of the electrolytic cell 1, which delivers oxygen side electrolyte to the electrolytic cell 1.
The third gas-liquid channel 19 is connected to the anode chamber of each electrolytic reactor 12 and to an anolyte inlet (not shown). The third gas-liquid passage 19 delivers the hydrogen-side electrolytic solution to the anode chambers of the respective electrolytic reactors 12.
A fourth gas-liquid channel (not shown) is connected to the cathode chamber of each electrolytic reactor 12 and to a catholyte inlet (not shown). A fourth gas-liquid channel (not shown) delivers the oxygen-side electrolyte to the cathode chamber of each electrolytic reactor 12.
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. An apparatus for producing hydrogen by electrolyzing water, comprising: the hydrogen side gas-liquid separator is arranged on the oxygen side of the electrolytic bath;
the electrolytic cell is provided with a hydrogen liquid outlet, an oxygen liquid outlet, an anolyte inlet, a catholyte inlet and at least one group of electrolytic reactors; the electrolytic reactor is provided with a cathode chamber and an anode chamber, and is configured to electrolyze a hydrogen-side electrolyte to form a gas-liquid mixture containing hydrogen gas, and electrolyze an oxygen-side electrolyte to form a gas-liquid mixture containing oxygen gas; the oxygen liquid outlet is connected with the anode chamber and is used for discharging a gas-liquid mixture containing oxygen out of the electrolytic cell; the hydrogen gas liquid outlet is connected with the cathode chamber and is arranged to discharge a gas-liquid mixture containing hydrogen gas out of the electrolytic cell; the anolyte inlet is connected to the anode chamber and is configured to supply a hydrogen side electrolyte to the anode chamber; the catholyte inlet is connected to the cathode chamber and configured to supply oxygen-side electrolyte to the cathode chamber;
the hydrogen side gas-liquid separator is provided with a hydrogen liquid inlet and a hydrogen side electrolyte outlet, the hydrogen liquid inlet is connected with the hydrogen liquid outlet of the electrolytic cell, and the hydrogen side gas-liquid separator is used for separating a gas-liquid mixture containing hydrogen to form a hydrogen side mixed solution and hydrogen to be purified, and enabling the hydrogen side mixed solution to form a hydrogen side electrolyte;
the oxygen side gas-liquid separator is provided with an oxygen liquid inlet and an oxygen side electrolyte outlet, the oxygen liquid inlet is connected with the oxygen liquid outlet of the electrolytic cell, the oxygen side gas-liquid separator is used for separating a gas-liquid mixture containing oxygen to form an oxygen side mixed solution and oxygen to be purified, and the oxygen side mixed solution is made to form an oxygen side electrolyte;
the two ends of the first circulating pipe are respectively connected with the hydrogen-side electrolyte outlet and the anode electrolyte inlet and are used for conveying the hydrogen-side electrolyte to the anode electrolyte inlet;
the two ends of the second circulation pipe are respectively connected with the oxygen-side electrolyte outlet and the cathode electrolyte inlet and are used for conveying the oxygen-side electrolyte to the cathode electrolyte inlet;
one end of the balance pipe is connected with the first circulation pipe, the other end of the balance pipe is connected with the second circulation pipe, and the balance pipe is used for balancing the liquid levels of the hydrogen side gas-liquid separator and the oxygen side gas-liquid separator.
2. The apparatus for producing hydrogen by electrolyzing water according to claim 1, wherein said equilibrium tube is provided at an end of said first circulation tube close to said hydrogen-side gas-liquid separator and at an end of said second circulation tube close to said oxygen-side gas-liquid separator, said equilibrium tube being parallel to said hydrogen-side gas-liquid separator and said oxygen-side gas-liquid separator.
3. The apparatus for producing hydrogen by electrolyzing water as claimed in claim 1, wherein the first circulation pipe is provided with a first feed pump, and the first feed pump is configured to control the amount of the hydrogen side electrolyte delivered to the electrolytic cell, thereby controlling the liquid level of the hydrogen side gas-liquid separator; and a second feeding pump is arranged on the second circulating pipe and is used for controlling the amount of the electrolyte at the oxygen side conveyed to the electrolytic cell so as to control the liquid level of the gas-liquid separator at the oxygen side.
4. The apparatus for producing hydrogen by electrolyzing water according to claim 1, further comprising a hydrogen side scrubber and an oxygen side scrubber;
the hydrogen side gas-liquid separator is also provided with a hydrogen gas outlet to be purified and a hydrogen side washing liquid inlet, and the oxygen side gas-liquid separator is also provided with an oxygen gas outlet to be purified and an oxygen side washing liquid inlet;
the hydrogen side scrubber is provided with a hydrogen inlet to be purified, a hydrogen outlet and a hydrogen side scrubbing liquid outlet; the hydrogen inlet to be purified is connected with the hydrogen outlet to be purified of the hydrogen-side gas-liquid separator, and the hydrogen-side washing liquid outlet is connected with the hydrogen-side washing liquid inlet of the hydrogen-side gas-liquid separator; the hydrogen side scrubber is configured to scrub hydrogen gas to be purified to form hydrogen gas and a hydrogen side scrubbing solution;
the oxygen side scrubber is provided with an oxygen inlet to be purified, an oxygen outlet and an oxygen side scrubbing liquid outlet; the to-be-purified oxygen inlet is connected with the to-be-purified oxygen outlet of the oxygen side gas-liquid separator, and the oxygen side washing liquid outlet is connected with the oxygen side washing liquid inlet of the oxygen side gas-liquid separator; the oxygen side scrubber is configured to scrub the oxygen to be purified to form oxygen and an oxygen side scrubbing liquid.
5. The apparatus for producing hydrogen by electrolyzing water as claimed in claim 4, further comprising a demineralized water tank and a water supply pump;
the desalting water tank is respectively connected with the hydrogen side scrubber and the oxygen side scrubber through the water supply pump; the demineralized water tank is configured to supply demineralized water to the hydrogen side scrubber and the oxygen side scrubber; the water supply pump is configured to control the supply amount of the demineralized water, thereby controlling the liquid levels of the hydrogen-side gas-liquid separator and the oxygen-side gas-liquid separator.
6. The apparatus for producing hydrogen by electrolyzing water as claimed in claim 1, wherein said electrolytic reactor comprises cation exchange membrane, cathode plate and anode plate;
the cathode plate and the anode plate are arranged in parallel and opposite to each other, and the cation exchange membrane is arranged between the cathode plate and the anode plate; a cathode chamber is formed between the cathode plate and the cation exchange membrane, and an anode chamber is formed between the anode plate and the cation exchange membrane.
7. The apparatus for producing hydrogen by electrolyzing water as claimed in claim 6, wherein said electrolytic reactor further comprises an anode metal mesh and a cathode metal mesh;
the anode metal mesh is arranged between the anode plate and the cation exchange membrane and is in contact with the cation exchange membrane and the anode plate;
the cathode metal mesh is arranged between the cathode plate and the cation exchange membrane and is in contact with the cation exchange membrane and the cathode plate.
8. The apparatus for producing hydrogen by electrolyzing water according to claim 1, wherein the electrolytic cell further comprises an end press plate, a middle pole frame, an end pole frame and a plurality of groups of electrolytic reactors;
the end pressure plates are arranged at two ends of the electrolytic cell, the middle pole frame is arranged between the two adjacent groups of electrolytic reactors, and the end pole frame is arranged between the electrolytic reactors at the two ends and the end pressure plates.
9. The apparatus for producing hydrogen by electrolyzing water as claimed in claim 8, wherein said electrolytic cell is provided with an oxygen frame and a hydrogen frame;
the oxygen electrode frame is arranged at the upper end and the lower end of the anode chamber, and the hydrogen electrode frame is arranged at the upper end and the lower end of the cathode chamber.
10. An apparatus for producing hydrogen by electrolyzing water as claimed in claim 8, wherein said electrolytic cell is further provided with an insulating plate disposed between said end pressing plate and said end frame.
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| CN113802146A (en) * | 2021-10-14 | 2021-12-17 | 中国华能集团清洁能源技术研究院有限公司 | Electrolytic cell diaphragm integrity online test system and use method |
| CN113881951A (en) * | 2021-11-03 | 2022-01-04 | 中国华能集团清洁能源技术研究院有限公司 | Alkali liquor segmented circulating electrolysis system and working method thereof |
| CN114717577A (en) * | 2022-05-09 | 2022-07-08 | 中国华能集团清洁能源技术研究院有限公司 | Hydrogen-oxygen self-balancing device and method for water electrolysis hydrogen production system |
| CN114990571A (en) * | 2022-05-25 | 2022-09-02 | 中国联合重型燃气轮机技术有限公司 | Water electrolysis device |
| CN115233248A (en) * | 2022-07-08 | 2022-10-25 | 广东佳德环保科技有限公司 | Water electrolysis hydrogen production and power generation integrated device and hydrogen production and power generation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113802146A (en) * | 2021-10-14 | 2021-12-17 | 中国华能集团清洁能源技术研究院有限公司 | Electrolytic cell diaphragm integrity online test system and use method |
| CN113802146B (en) * | 2021-10-14 | 2024-03-26 | 中国华能集团清洁能源技术研究院有限公司 | Electrolytic cell diaphragm integrity online test system and use method |
| CN113881951A (en) * | 2021-11-03 | 2022-01-04 | 中国华能集团清洁能源技术研究院有限公司 | Alkali liquor segmented circulating electrolysis system and working method thereof |
| CN114717577A (en) * | 2022-05-09 | 2022-07-08 | 中国华能集团清洁能源技术研究院有限公司 | Hydrogen-oxygen self-balancing device and method for water electrolysis hydrogen production system |
| CN114717577B (en) * | 2022-05-09 | 2024-01-26 | 中国华能集团清洁能源技术研究院有限公司 | Oxyhydrogen self-balancing device and method for electrolytic water hydrogen production system |
| CN114990571A (en) * | 2022-05-25 | 2022-09-02 | 中国联合重型燃气轮机技术有限公司 | Water electrolysis device |
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| CN116395639A (en) * | 2023-06-09 | 2023-07-07 | 温州高企氢能科技有限公司 | Hydrogen preparation and purification system |
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