CN113106475A - Wide-power water electrolysis hydrogen production system - Google Patents
Wide-power water electrolysis hydrogen production system Download PDFInfo
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- CN113106475A CN113106475A CN202110273992.5A CN202110273992A CN113106475A CN 113106475 A CN113106475 A CN 113106475A CN 202110273992 A CN202110273992 A CN 202110273992A CN 113106475 A CN113106475 A CN 113106475A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
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- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
Abstract
The utility model relates to a wide power brineelectrolysis hydrogen manufacturing system belongs to brineelectrolysis hydrogen manufacturing technical field, it includes the brineelectrolysis hydrogen manufacturing module that the multiunit is parallelly connected, set up the brineelectrolysis hydrogen manufacturing module of a plurality of different power grades in every brineelectrolysis hydrogen manufacturing module, every brineelectrolysis hydrogen manufacturing module includes a plurality of electrolysis tanks, be provided with many platinum catalysis sticks in every electrolysis tank, the periphery rigid coupling of catalysis stick has the globular platinum metal catalytic unit of a plurality of pinecones, all catalysis sticks rotate around the axis of catalysis stick through drive arrangement. The method has the effects of adapting to power fluctuation of wind power and photovoltaic power and improving the reaction speed and production efficiency of electrolytic hydrogen.
Description
Technical Field
The application relates to the field of electrolytic hydrogen production, in particular to a wide-power water electrolysis hydrogen production system.
Background
At present, in a new energy system, hydrogen energy is an ideal secondary energy, and compared with other energy sources, the hydrogen heat value is high, and a combustion product is water, so that the hydrogen energy is the most environment-friendly energy source. Hydrogen is stored in the form of both gas and liquid phases in high pressure tanks and in the form of solid phases in hydrogen storage materials, and therefore, hydrogen is considered to be the most promising energy carrier for replacing traditional fossil fuels. At present, the hydrogen production method mainly comprises coal hydrogen production, natural gas reforming hydrogen production and the like, wherein the hydrogen production method is pollution-free and the purity of the obtained hydrogen is high through a water electrolysis mode. However, the water electrolysis hydrogen production has the problem of high cost, so that the water electrolysis hydrogen production has not been popularized and applied. With the large-scale development of wind power, photovoltaic power generation, tidal power generation and other technologies in China, the hydrogen production by electrolyzing water by utilizing renewable energy provides a green, low-carbon, low-cost and sustainable production mode for hydrogen energy.
However, due to the fluctuation of power supplies such as wind power, photovoltaic and the like, higher requirements are put forward on the power fluctuation resistant range and system control of the water electrolysis hydrogen production system. The patent with publication number CN111826669A discloses a large-scale water electrolysis hydrogen production system with wide power fluctuation adaptability and a control method, wherein a plurality of water electrolysis hydrogen production modules with different power levels are arranged in each water electrolysis hydrogen production module connected in parallel, and the scheme adopts a system architecture flexibly matching the water electrolysis hydrogen production modules with different power levels, so that each water electrolysis hydrogen production device is in the vicinity of an optimal working point under the wide power fluctuation condition, therefore, the hydrogen production energy consumption efficiency of large-scale water electrolysis under each input working condition can be improved, and the wide power fluctuation adaptability of the water electrolysis hydrogen production system is greatly improved.
In the recent research results of the Chinese scientific and technical university, the original plate-shaped and sheet-shaped platinum metal catalyst is skillfully designed into a 'loose ball structure' catalyst distributed all over the needle point, and under the condition of keeping the catalytic hydrogen production effect unchanged, compared with a commercial platinum carbon catalyst, the consumption of the platinum metal is only one seventy-fifth of the original consumption, so that the cost of the catalyst is greatly reduced. Further research around the technology is needed, and therefore, how to design a water electrolysis hydrogen production system which has wide power fluctuation applicability and is more efficient and economical is a technical problem to be solved.
Disclosure of Invention
In order to solve the technical problems of high cost and small power fluctuation resistance range of water electrolysis hydrogen production, the application provides a wide-power water electrolysis hydrogen production system.
The wide-power water electrolysis hydrogen production system provided by the application adopts the following technical scheme:
including the parallelly connected brineelectrolysis hydrogen manufacturing module of multiunit, set up the brineelectrolysis hydrogen manufacturing module of a plurality of different power grades in every brineelectrolysis hydrogen manufacturing module, every brineelectrolysis hydrogen manufacturing module includes a plurality of electrolysis tanks, is provided with many platinum catalysis sticks in every electrolysis tank, and the periphery rigid coupling of catalysis stick has the globular platinum metal catalytic unit of a plurality of pinecones, and the catalysis stick rotates around the axis of catalysis stick through drive arrangement.
By adopting the technical scheme, when the electric quantity is changed, the corresponding number of the electrolyzed water modules and the corresponding number of the electrolyzed water modules in the modules can be started, so that the system can adapt to the power fluctuation of wind power and photovoltaic power; a plurality of pinecone-shaped platinum metal catalytic units are fixedly connected to the periphery of the catalytic rod, so that the contact area of the catalyst and reactants in the alkaline electrolytic solution is greatly increased; when the catalytic rod rotates in the electrolytic bath, the pinecone-shaped platinum metal catalytic unit and the alkaline electrolytic solution generate relative motion, so that hydrogen or oxygen bubbles generated on the surface of the catalytic unit are timely separated from the catalyst, the alkaline electrolytic solution can be contacted with the catalyst more fully and efficiently to generate reaction, and the reaction speed is further improved.
Optionally, the rotation directions of two adjacent catalytic rods are opposite.
By adopting the technical scheme, the alkaline electrolytic solutions around the platinum metal catalytic unit generate mutual impact, and bubbles are better separated.
Optionally, each electrolytic cell is divided into a plurality of cathode reaction areas and anode reaction areas by ion exchange membranes, and a plurality of catalytic rods of each reaction area are arranged in at least two rows and are arranged in the electrolytic cell in an equidistant plum blossom shape.
By adopting the technical scheme, the space in the electrolytic cell is fully utilized, the size of equipment is reduced, and the reaction efficiency is improved.
Optionally, the electrolytic cell is provided with a closed cell top plate, the driving device is installed on the upper surface of the cell top plate, a rotating shaft of the driving device is coaxially connected with the catalytic rod, an insulating section is arranged at a joint of the rotating shaft and the catalytic rod, and the electrified conducting wire is abutted to the peripheral wall of the part, exposed out of the cell top plate, of the catalytic rod.
By adopting the technical scheme, the catalytic rod can rotate and can be in an electrified state to perform catalytic reaction.
Optionally, the lower surface of the top plate of the electrolytic cell is fixedly connected with a plurality of partition plates at positions corresponding to the ion exchange membrane, hydrogen is collected to the hydrogen gas-liquid separator by the hydrogen collecting pipe horizontally penetrating through the partition plates, and oxygen is collected to the oxygen gas-liquid separator by the oxygen collecting pipe horizontally penetrating through the partition plates.
By adopting the technical scheme, the hydrogen and the oxygen are respectively recycled, and the mixing of the hydrogen and the oxygen is avoided.
Optionally, the pinecone-shaped platinum metal catalytic unit comprises a center rod vertically and fixedly connected to the outer peripheral surface of the catalytic rod, and a plurality of layers of petal-shaped reaction plates fixedly connected to the outer peripheral surface of the center rod.
By adopting the technical scheme, the contact area of the catalyst and reactants in the alkaline electrolytic solution is greatly increased, and the reaction plate is basically in a vertical state, so that the bubbles can be conveniently discharged.
Optionally, a fan blade device for enabling the alkaline electrolytic solution to flow upwards from the bottom is arranged at the bottom in the electrolytic cell;
by adopting the technical scheme, not only the bubbles generated on the surface of the catalyst are timely separated from the catalyst, but also the generated bubbles can quickly rise to the surface of the alkaline electrolytic solution, so that the reaction speed is further increased, and the efficiency is improved.
Optionally, the electrolytic cell is communicated with a purifier, and the alkaline electrolytic solution in the electrolytic cell is purified by the purifier and then pumped into the electrolytic cell by a circulating pump.
By adopting the technical scheme, because the alkaline electrolytic solution in the electrolytic cell is always in a motion state, the alkaline electrolytic solution can easily react with the cell wall of the electrolytic cell and other facilities in the cell to form impurities, the concentration of the alkaline electrolytic solution is influenced, and the formed impurities are attached to the surface of the platinum metal catalytic unit to reduce the catalytic effect, so that the solution in the electrolytic cell is purified and then pumped into the electrolytic cell, the solution is close to the optimal concentration, and the normal operation of hydrogen reaction is ensured.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the system can adapt to the power fluctuation of wind power and photovoltaic power by arranging a plurality of water electrolysis modules connected in parallel and electrolysis baths with different powers; the arrangement of the catalytic rod and the pinecone-shaped platinum metal catalytic unit increases the contact area between the catalyst and the alkaline electrolytic solution; when the catalytic rod rotates in the electrolytic bath, the pinecone-shaped platinum metal catalytic unit and the alkaline electrolytic solution generate relative motion, so that hydrogen or oxygen bubbles generated on the surface of the catalytic unit are timely separated from the catalyst, the alkaline electrolytic solution can be contacted with the catalyst more fully and efficiently to generate reaction, and the reaction speed is further improved;
2. by arranging the fan blade device, bubbles on the surface of the catalyst are further separated in time, and the generated bubbles can quickly rise to the surface of the alkaline electrolytic solution, so that the reaction speed is further increased, and the efficiency is improved;
3. through setting up the clarifier, purify the interior solution of electrolysis trough, then pump into the electrolysis trough again for solution is close best concentration and purity, has guaranteed the normal clear of hydrogen reaction.
Drawings
FIG. 1 is an overall schematic diagram of a wide power water electrolysis hydrogen production system;
FIG. 2 is a schematic view of the construction of the electrolytic cell;
FIG. 3 is an enlarged partial schematic view of portion A of FIG. 2;
FIG. 4 is a schematic structural view (plan view) showing the focal point of a quincunx arrangement of catalytic rods and a purification circulation path of an alkaline electrolytic solution in an electrolytic cell.
Description of reference numerals: 1. a catalytic rod; 11. a center pole; 12. reaction plates; 2. an ion exchange membrane; 3. a drive device; 4. a conductive spring plate; 5. a trough top plate; 6. a partition panel; 71. a hydrogen collecting pipe; 72. an oxygen collecting pipe; 8. a fan blade device; 81. a fan blade; 82. a waterproof type drive motor; 91. a liquid discharge pipe; 92. a liquid inlet pipe.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The application discloses a wide-power water electrolysis hydrogen production system, which refers to fig. 1 and comprises a rectifier transformer and a plurality of groups of water electrolysis hydrogen production modules connected in parallel, wherein each water electrolysis hydrogen production module is provided with a plurality of electrolysis baths with different power levels, and wind power, photovoltaic power and the like are converted into direct current through the rectifier transformer and then transmitted to the water electrolysis hydrogen production modules; the hydrogen production system also comprises a hydrogen gas-liquid separator, an oxygen gas-liquid separator, a hydrogen cooler and an oxygen cooler. Hydrogen produced by the water electrolysis hydrogen production module reaction sequentially passes through the hydrogen gas-liquid separator for water separation, is washed and cooled by the hydrogen cooler, and is finally stored. And the oxygen produced by the water electrolysis hydrogen production module reaction is sequentially subjected to water separation through an oxygen gas-liquid separator, washed and cooled through an oxygen cooler and finally stored. In addition, the hydrogen production system further comprises a purifier for purifying the alkaline electrolytic solution in the electrolytic cell. The purifier is also connected with a liquid supplementing device for supplementing alkaline electrolytic solution.
Referring to fig. 2, each electrolytic cell is divided into a plurality of cathode reaction areas and anode reaction areas by an ion exchange membrane 2, a plurality of platinum catalytic rods 1 are arranged in each reaction area, and a plurality of pinecone-shaped platinum metal catalytic units are fixedly connected to the peripheries of the catalytic rods 1. As shown in fig. 3, the pinecone-shaped platinum metal catalytic unit includes a center rod 11 vertically fixed to the outer peripheral surface of the catalytic rod 1, and a plurality of layers of petal-shaped reaction plates 12 fixed to the outer peripheral surface of the center rod 11. The multiple layers of reaction plates 12 are axially arranged along the central rod 11, each layer is provided with 3-6 reaction plates 12, and the reaction plates are uniformly fixed on the peripheral surface of the central rod 11 in a petal shape.
With reference to fig. 2 and 3, the cell is provided with a closed cell roof 5, and all the catalytic rods 1 extend out of the cell roof 5 and are rotated about the axes of the catalytic rods 1 by the driving means 3. Drive arrangement 3 can be the upper surface motor of installing at roof 5, and drive arrangement 3's pivot and catalysis stick 1 coaxial coupling, and the pivot is provided with the insulating section with the kneck of catalysis stick 1, and circular telegram wire and the perisporium butt of catalysis stick 1 exposure roof 5 part. Preferably, a conductive elastic sheet 4 can be arranged, one end of the conductive elastic sheet 4 is connected with the electrified lead and fixed on the top plate 5 of the electrolytic cell, and the other end is pressed against the peripheral wall of the catalytic rod 1. Referring to fig. 4, the plurality of catalytic rods 1 of each cathode reaction zone and each anode reaction zone may be arranged in two or more rows, and in order to save space, the plurality of rows of catalytic rods 1 are arranged in an equidistant plum blossom shape in the electrolytic cell. In order to increase the impact of the alkaline electrolytic solution on the surface of the catalytic unit, the rotation directions of the adjacent two catalytic rods 1 are opposite.
Referring back to fig. 2, the lower surface of the top plate 5 of the electrolytic cell is fixedly connected with a plurality of partition plates 6 at positions corresponding to the ion exchange membrane 2, and the bottoms of the partition plates 6 extend into the alkaline electrolytic solution and are connected with the electrolytic ion exchange membrane 2. The partition plates 6 divide the top space of the electrolytic cell into a plurality of independent spaces, so that the generated hydrogen and oxygen are prevented from being mixed. The hydrogen collecting pipe 71 and the oxygen collecting pipe 72 horizontally penetrate through the plurality of partition plates 6, the hydrogen collecting pipe 71 is provided with an air inlet in a hydrogen reaction area, and the oxygen collecting pipe 72 is provided with an air inlet in an oxygen reaction area. The hydrogen collecting pipe 71 is communicated with the hydrogen gas-liquid separator, and the oxygen collecting pipe 72 is communicated with the oxygen gas-liquid separator.
In order to accelerate the discharge of the gas in the alkaline electrolytic solution, a fan blade device 8 for making the alkaline electrolytic solution flow upward from the bottom is installed at the bottom in the electrolytic cell, and the fan blade device 8 comprises a fan blade 81 and a waterproof driving motor 82.
As shown in FIG. 4, the electrolytic cell is communicated with a purifier, and the alkaline electrolytic solution in the electrolytic cell is purified by the purifier and then pumped into the electrolytic cell by a circulating pump. Liquid discharge ports and liquid inlets are respectively formed in two opposite electrolytic tank walls of each reaction area, all the liquid discharge ports are arranged at positions close to the bottom plate of the electrolytic tank, and the liquid discharge ports are communicated through liquid discharge pipes 91 and then connected with the purifier. All liquid inlets are arranged at positions close to the groove top plate 5 and are communicated by a liquid inlet pipe 92 to be connected with an outlet of the purifier.
The implementation principle of the wide-power water electrolysis hydrogen production system in the embodiment of the application is as follows: when the electric quantity is large, starting all the water electrolysis modules and all the electrolytic tanks in the modules; when the electric quantity is small, selecting part of the electrolytic water modules to start, and selectively starting the electrolytic cells with different powers according to the electric quantity, so that the system can adapt to the power fluctuation of wind power and photovoltaic power; hydrogen and oxygen are generated in the electrified electrolytic cell, the catalytic rod 1 rotates in the electrolytic cell, the pinecone-shaped spherical platinum metal catalytic unit and the alkaline electrolytic solution move relatively, so that hydrogen or oxygen bubbles generated on the surface of the catalytic unit are timely separated from the catalyst, and the bubbles are quickly discharged along with the rising alkaline electrolytic solution under the stirring of the fan blades, so that the reaction speed is integrally improved, and the efficiency of producing hydrogen and oxygen is improved. After a period of production, the alkaline electrolyte solution in the electrolytic cell contains more impurities, and at this time, the alkaline electrolyte solution in the electrolytic cell is discharged to the purifier through the liquid discharge pipe 91, and the purifier purifies the alkaline electrolyte solution and then introduces the alkaline electrolyte solution into the electrolytic cell through the liquid inlet pipe 92.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a wide power brineelectrolysis hydrogen manufacturing system, includes the brineelectrolysis hydrogen manufacturing module that the multiunit is parallelly connected, sets up the brineelectrolysis hydrogen manufacturing module of a plurality of different power grades in every brineelectrolysis hydrogen manufacturing module, and every brineelectrolysis hydrogen manufacturing module includes a plurality of electrolysis trough, its characterized in that: be provided with many platinum catalytic rods (1) in every electrolysis trough, the periphery rigid coupling of catalytic rod (1) has a plurality of spherical platinum metal catalytic unit of pine cone, and catalytic rod (1) rotates around the axis of catalytic rod (1) through drive arrangement (3).
2. The wide power water electrolysis hydrogen production system according to claim 1, characterized in that: the rotation directions of two adjacent catalytic rods (1) are opposite.
3. The wide power water electrolysis hydrogen production system according to claim 2, characterized in that: a plurality of negative reaction areas and positive reaction areas are separated into each electrolytic cell through an ion exchange membrane (2), and a plurality of catalytic rods (1) of each reaction area are arranged in at least two rows and are arranged in the electrolytic cell in an equidistant plum blossom shape.
4. The wide power water electrolysis hydrogen production system according to claim 3, characterized in that: the electrolytic cell is provided with confined cell roof (5), and drive arrangement (3) are installed at the upper surface of cell roof (5), and the pivot and the catalysis stick (1) coaxial coupling of drive arrangement (3), and the kneck of pivot and catalysis stick (1) is provided with insulating section, and circular wall butt that circular telegram wire and catalysis stick (1) expose cell roof (5) part.
5. The wide power water electrolysis hydrogen production system according to claim 4, characterized in that: the lower surface of a top plate (5) of the electrolytic cell is fixedly connected with a plurality of partition plates (6) at positions corresponding to the ion exchange membrane (2), hydrogen is collected to the hydrogen gas-liquid separator by a hydrogen collecting pipe (71) horizontally penetrating through the partition plates (6), and oxygen is collected to the oxygen gas-liquid separator by an oxygen collecting pipe (72) horizontally penetrating through the partition plates (6).
6. The wide power electrolytic water hydrogen production system according to any one of claims 1 to 5, characterized in that: the pinecone-shaped platinum metal catalytic unit comprises a center rod (11) vertically and fixedly connected to the peripheral surface of the catalytic rod (1) and a plurality of layers of petal-shaped reaction plates (12) fixedly connected to the peripheral surface of the center rod (11).
7. The wide power electrolytic water hydrogen production system according to any one of claims 1 to 5, characterized in that: the bottom in the electrolytic cell is provided with a fan blade device (8) which can make alkaline electrolytic solution flow upwards from the bottom.
8. The wide power electrolytic water hydrogen production system according to any one of claims 1 to 5, characterized in that: the electrolytic cell is communicated with a purifier, and alkaline electrolytic solution in the electrolytic cell is purified by the purifier and then pumped into the electrolytic cell by a circulating pump.
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Cited By (2)
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| CN112553640A (en) * | 2019-09-09 | 2021-03-26 | 梁尚安 | Solar energy electrolytic water dynamic hydrogen and oxygen production equipment |
| CN113737203A (en) * | 2021-09-27 | 2021-12-03 | 长江勘测规划设计研究有限责任公司 | Evaporative cooling medium self-circulation full-immersion type water electrolysis hydrogen production system and use method |
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Application publication date: 20210713 |