A series type SPE pure water electrolyzer and its guide net and guide ring

Abstract

The present invention discloses a series type SPE pure water electrolyzer and its guide net and guide ring, which relate to the technical field of series type SPE pure water electrolyzer; in order to improve efficiency and stability; the electrolyzer comprises a negative electrode side end plate, a positive electrode side end plate and two or more single slots stacked between the negative electrode side end plate and the positive electrode side end plate; the guide net is actually the anode guide net in the series type SPE pure water electrolyzer, and the anode guide net comprises a first grid line and a second grid line that are staggered; the guide ring is actually the cathode guide ring and the anode guide ring in the series type SPE pure water electrolyzer, and the cathode guide ring comprises a cathode guide ring body, a cathode bolt hole and a cathode sealing groove. The present invention can realize the series connection of two or even more electrolyzers, has a simple structure, is practical and reliable, and provides an optimized solution for efficient hydrogen production; adopts water inlets and outlets of different sizes, so that the flow field distribution near the water outlet is more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of a series type SPE pure water electrolyzer, in particular to a series type SPE pure water electrolyzer and a flow guide net and a flow guide ring thereof. Background Art

[0002] As an efficient and clean energy, hydrogen is highly favored in the future energy system. In addition, as people's demand for health gradually increases, hydrogen medical treatment has also emerged, and hydrogen inhalation machines and hydrogen-rich water cups have come out one after another. Water electrolysis hydrogen production technology is no longer unfamiliar to everyone. Traditional water electrolysis technology is mainly based on alkaline electrolyzers, but the corrosive electrolyte is easily discharged with the gas. Obviously, its safety is not particularly suitable for human medical treatment. SPE water electrolysis uses pure water, which is non-corrosive, and the purity of hydrogen can reach 99.999%, which has an absolute advantage in hydrogen medical treatment.

[0003] In order to meet the needs of different scenarios, the SPE electrolyzer needs to achieve different hydrogen production rates. The anode water flow method is adopted. By sharing the anode, two electrolyzers are connected in parallel, which can increase the hydrogen production rate by 1 times, but such an increase is still very limited. The structure of the series-type SPE electrolyzer is like a fuel cell stack. Multiple pieces or even dozens of pieces can be stacked up, and the hydrogen production rate can be adjusted over a large range. The SPE electrolyzer in the present invention has a simple structure, a uniform water flow field, and a strong catalyst adhesion. It has the advantages of high efficiency, good stability, and long service life, and provides an optimized solution for SPE in a variety of application scenarios. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a series type SPE pure water electrolyzer and its guide net and guide ring.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A series type SPE pure water electrolyzer comprises a negative electrode side end plate, a positive electrode side end plate and two or more single cells stacked between the negative electrode side end plate and the positive electrode side end plate, wherein a negative electrode side current collecting plate and a positive electrode side current collecting plate are respectively arranged between the single cell located at the top and the single cell located at the bottom and the negative electrode side end plate and the positive electrode side end plate, and an insulating plate is respectively arranged between the negative electrode side current collecting plate and the positive electrode side current collecting plate and the negative electrode side end plate and the positive electrode side end plate; the single cell comprises a cathode guide ring and an anode guide ring, and the cathode guide ring and the anode guide ring inner walls are respectively embedded with a cathode guide ring sealing glue line and an anode guide ring sealing glue line of adapted size, and a cathode current collector, a cathode microporous layer, a membrane electrode, an anode current collector and an anode guide net are arranged in sequence between the cathode guide ring and the anode guide ring; an intermediate conductive plate is arranged between two adjacent single cells; and the electrolyzer as a whole is penetrated by bolts and fixedly installed with nuts.

[0007] Preferably: the negative electrode side end plate and the positive electrode side end plate are both glass cloth laminates or high-strength aluminum materials with a thickness of 5-10 mm; the negative electrode side current collecting plates and the positive electrode side current collecting plates are both metal plain plates with pole ears, using titanium substrates and platinum-plated.

[0008] Furthermore: the cathode microporous layer is a specially made stainless steel felt with a filtration accuracy of 40-80 μm.

[0009] Further preferably, the cathode current collector and the anode current collector are both multi-layer sintered woven wire meshes, the mesh number of the wire mesh is 20-80 meshes; the materials are stainless steel and titanium respectively, wherein the anode current collector is platinum-plated.

[0010] As a preferred embodiment of the present invention, the membrane electrode adopts a solid polymer proton membrane, and the catalyst is attached to the solid polymer electrolyte membrane by a permeation method.

[0011] A flow guide net for a series type SPE pure water electrolyzer, which is essentially an anode flow guide net in the series type SPE pure water electrolyzer, wherein the anode flow guide net comprises a first grid line and a second grid line which are staggered; the anode flow guide net and the second grid line both comprise long sections and short sections for forming meshes, the long sections and the short sections are staggered, and the short sections of the first grid line are all arranged below the short sections of the second grid line which is adjacent to the left side thereof.

[0012] As a further solution of the present invention: the material of the anode guide mesh is titanium, model TA1; a coating is arranged on the surface of the anode guide mesh, and the coating is ruthenium iridium or platinum; the shape of the anode guide mesh is rhombus, square or circle adapted to the activation area of ​​the electrolytic cell.

[0013] A guide ring for a series type SPE pure water electrolyzer, which is essentially a cathode guide ring and an anode guide ring in the series type SPE pure water electrolyzer, wherein the cathode guide ring comprises a cathode guide ring body, a cathode bolt hole and a cathode sealing groove; a hydrogen guide groove is arranged on an outer wall on one side of the top of the cathode guide ring body, a cathode hydrogen outlet is arranged in the hydrogen guide groove, a cathode water outlet is arranged on an outer wall on one side of the top of the cathode guide ring body, and a cathode water inlet is arranged on an outer wall on the other side of the top of the cathode guide ring body; the anode guide ring comprises an anode guide ring body, an anode bolt hole and an anode sealing groove; water guide grooves are symmetrically arranged on the outer walls on both sides of the top of the anode guide ring body, an anode water outlet and an anode water inlet are arranged in the two water guide grooves respectively, and an anode hydrogen outlet is arranged on an outer wall on one side of the top of the anode guide ring body.

[0014] Based on the above scheme, it is preferred that: the inner diameter of the cathode water outlet is larger than the inner diameter of the cathode water inlet, and the inner diameter of the anode water outlet is larger than the inner diameter of the anode water inlet; the cathode bolt holes and the anode bolt holes are evenly distributed on the top outer walls of the cathode guide ring body and the anode guide ring body, respectively, and the number is.

[0015] On the basis of the above scheme, it is further preferred that: the cathode sealing groove ensures that the cathode hydrogen outlet is connected with the inside of the cathode guide ring body, and isolates the cathode water outlet and the cathode water inlet; the anode sealing groove ensures that the anode water outlet and the anode water inlet are connected with the inside of the anode guide ring body, and isolates the anode hydrogen outlet; the sealing method of the cathode sealing groove and the anode sealing groove is glue-dispensing sealing, and the glue used for glue-dispensing is silicone rubber, EPDM or fluororubber; the water guide groove and the hydrogen guide groove are both provided with transition fillets.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention can realize the series connection of two or even more electrolyzers, has a simple structure, is practical and reliable, and provides an optimized solution for efficient hydrogen production; the use of water inlets and outlets of different sizes makes the flow field distribution near the water outlet more uniform.

[0018] 2. The present invention adopts a dispensing method for sealing, which reduces the use of other sealing components, improves the assemblability of the electrolytic cell, and makes the whole more simple and reliable.

[0019] 3. The 3D flow field of the anode side flow network adopted in the present invention weakens the impact effect of water flow and oxygen flow, realizes good distribution of gas and water, reduces the starvation effect of water reaching the collector to a certain extent, improves water electrolysis efficiency and reduces energy consumption.

[0020] 4. The guide net for the SPE electrolytic cell of the present invention adopts a precious metal coating, has excellent corrosion resistance during the electrolysis process, and has a long service life of the electrolytic cell.

[0021] 5. The hydrogen guide groove and the water guide groove of the present invention both have optimized openings and rounded transitions, which ensure the laminar flow of the fluid near the guide area and avoid the starvation effect caused by turbulent flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a series SPE pure water electrolyzer proposed by the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a flow guide network of a series SPE pure water electrolyzer proposed by the present invention;

[0024] Figure 3 for Figure 2 A magnified view of point A;

[0025] Figure 4 A top view of a cathode guide ring of a series-type SPE pure water electrolyzer proposed by the present invention;

[0026] Figure 5 A bottom view of a cathode guide ring of a series-type SPE pure water electrolyzer proposed by the present invention;

[0027] Figure 6 A top view of an anode guide ring of a series-type SPE pure water electrolyzer proposed by the present invention;

[0028] Figure 7 The bottom view is of an anode guide ring of a series-type SPE pure water electrolyzer proposed by the present invention.

[0029] In the figure: 1 single tank, 2 negative electrode side end plate, 3 insulating plate, 4 negative electrode side current collecting plate, 5 cathode guide ring, 6 cathode guide ring sealing wire, 7 cathode current collector, 8 cathode microporous layer, 9 membrane electrode, 10 anode current collector, 11 anode guide net, 12 anode guide ring, 13 anode guide ring sealing wire, 14 middle conductive plate, 15 positive electrode side current collecting plate, 16 positive electrode side end plate, 111 first grid line, 112 second grid line, 11 3 long sections, 114 short sections, 500 cathode guide ring body, 501 cathode water outlet, 502 cathode bolt hole, 503 cathode sealing groove, 504 cathode hydrogen outlet, 505 hydrogen guide groove, 506 cathode water inlet, 1200 anode guide ring body, 1201 anode water outlet, 1202 anode bolt hole, 1203 anode sealing groove, 1204 anode hydrogen outlet, 1205 water guide groove, 1206 anode water inlet. DETAILED DESCRIPTION

[0030] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0033] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0034] Embodiment 1:

[0035] A series type SPE pure water electrolyzer, such as Figure 1 As shown, it includes a negative electrode side end plate 2, a positive electrode side end plate 16, and two or more single slots 1 stacked between the negative electrode side end plate 2 and the positive electrode side end plate 16, wherein the negative electrode side current collecting plate 4 and the positive electrode side current collecting plate 15 are respectively arranged between the single slot 1 located at the top and the single slot 1 located at the bottom and the negative electrode side end plate 2 and the positive electrode side end plate 16, and the negative electrode side current collecting plate 4 and the positive electrode side current collecting plate 15 are respectively arranged between the negative electrode side end plate 2 and the positive electrode side end plate 16; the single slot 1 includes a cathode guide ring 5 and an anode guide ring 12, the inner walls of the cathode guide ring 5 and the anode guide ring 12 are respectively embedded with a cathode guide ring sealing wire 6 and an anode guide ring sealing wire 13 of adapted size, and a cathode current collector 7, a cathode microporous layer 8, a membrane electrode 9, an anode current collector 10 and an anode guide net 11 are arranged in sequence between the cathode guide ring 5 and the anode guide ring 12; an intermediate conductive plate 14 is arranged between two adjacent single cells 1; the electrolytic cell as a whole is penetrated by bolts and fixed with nuts.

[0036] In order to improve the use effect; Figure 1 As shown, the negative electrode side end plate 2 and the positive electrode side end plate 16 are both glass cloth laminates or high-strength aluminum materials with a thickness of 5-10 mm; the negative electrode side current collecting plate 4 and the positive electrode side current collecting plate 15 are both metal plain plates with pole ears, using titanium substrates and platinum-plated.

[0037] In order to improve the use effect; Figure 1 As shown, the cathode microporous layer 8 is a specially made stainless steel felt with a filtration accuracy of 40-80 μm.

[0038] In order to improve the use effect; Figure 1 As shown, the cathode current collector 7 and the anode current collector 10 are both multi-layer sintered woven wire meshes with a mesh size of 20 to 80 meshes; the materials are stainless steel and titanium, respectively, wherein the anode current collector 10 is platinum-plated.

[0039] In order to improve the use effect; Figure 1As shown, the membrane electrode 9 adopts a solid polymer proton membrane, and the catalyst is attached to the solid polymer electrolyte membrane by a permeation method.

[0040] Embodiment 2:

[0041] A flow guide net for a series type SPE pure water electrolyzer, which is essentially the anode flow guide net 11 in the series type SPE pure water electrolyzer described in Example 1, such as Figure 1-3 As shown, the anode guide mesh 11 includes first grid lines 111 and second grid lines 112 that are staggered; the anode guide mesh 11 and the second grid lines 112 both include long sections 113 and short sections 114 for forming meshes, the long sections 113 and the short sections 114 are staggered, and the short sections 114 of the first grid line 111 are all arranged below the short sections 114 of the second grid line 112 adjacent to the left thereof.

[0042] The anode guide mesh 11 is made of titanium and its model is TA1.

[0043] The surface of the anode guide mesh 11 is provided with a coating, and the coating is made of ruthenium iridium or platinum.

[0044] The shape of the anode guide mesh 11 is rhombus, square or circle which is adapted to the activation area of ​​the electrolytic cell.

[0045] Embodiment 3:

[0046] A guide ring of a series type SPE pure water electrolyzer, which is essentially the cathode guide ring 5 and the anode guide ring 12 in the electrolyzer described in Example 1, such as Figure 4 , Figure 5 As shown, the cathode guide ring 5 includes a cathode guide ring body 500, a cathode bolt hole 502 and a cathode sealing groove 503; a hydrogen guide groove 505 is provided on the outer wall on one side of the top of the cathode guide ring body 500, a cathode hydrogen outlet 504 is provided in the hydrogen guide groove 505, a cathode water outlet 501 is provided on the outer wall on one side of the top of the cathode guide ring body 500, and a cathode water inlet 506 is provided on the outer wall on the other side of the top of the cathode guide ring body 500.

[0047] like Figure 6 , Figure 7 As shown, the anode guide ring 12 comprises an anode guide ring body 1200, an anode bolt hole 1202 and an anode sealing groove 1203; water guide grooves 1205 are symmetrically arranged on the outer walls on both sides of the top of the anode guide ring body 1200, and an anode water outlet 1201 and an anode water inlet 1206 are respectively opened in the two water guide grooves 1205, and an anode hydrogen outlet 1204 is opened on the outer wall on one side of the top of the anode guide ring body 1200.

[0048] The inner diameter of the cathode water outlet 501 is larger than the inner diameter of the cathode water inlet 506 , and the inner diameter of the anode water outlet 1201 is larger than the inner diameter of the anode water inlet 1206 .

[0049] The cathode bolt holes 502 and the anode bolt holes 1202 are evenly distributed on the top outer walls of the cathode guide ring body 500 and the anode guide ring body 1200 , respectively, and the number of the holes is .

[0050] The cathode sealing groove 503 ensures that the cathode hydrogen outlet 504 is electrically connected to the inside of the cathode guide ring body 500, and isolates the cathode water outlet 501 and the cathode water inlet 506; the anode sealing groove 1203 ensures that the anode water outlet 1201 and the anode water inlet 1206 are electrically connected to the inside of the anode guide ring body 1200, and isolates the anode hydrogen outlet 1204; the sealing method of the cathode sealing groove 503 and the anode sealing groove 1203 is glue-dispensing sealing, and the glue used for glue-dispensing is silicone rubber, EPDM or fluororubber.

[0051] The water guide groove 1205 and the hydrogen guide groove 505 are both provided with transitional rounded corners.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A series type SPE pure water electrolyzer, comprising a negative electrode side end plate (2), a positive electrode side end plate (16), and two or more single tanks (1) stacked between the negative electrode side end plate (2) and the positive electrode side end plate (16), characterized in that: A negative electrode side current collecting plate (4) and a positive electrode side current collecting plate (15) are arranged between the uppermost single cell (1) and the lowermost single cell (1) and the negative electrode side end plate (2) and the positive electrode side end plate (16), respectively; an insulating plate (3) is arranged between the negative electrode side current collecting plate (4) and the positive electrode side current collecting plate (15) and the negative electrode side end plate (2) and the positive electrode side end plate (16), respectively; the single cell (1) comprises a cathode current guide ring (5) and an anode current guide ring (12); the cathode current guide ring (5) and the anode current guide ring (12) are arranged between the cathode current guide ring (5) and the anode current guide ring (12); A cathode guide ring sealing rubber line (6) and an anode guide ring sealing rubber line (13) of matching sizes are respectively embedded in the inner wall of the flow ring (12); a cathode current collector (7), a cathode microporous layer (8), a membrane electrode (9), an anode current collector (10) and an anode guide net (11) are sequentially arranged between the cathode guide ring (5) and the anode guide ring (12); an intermediate conductive plate (14) is arranged between two adjacent single cells (1); and the electrolytic cell as a whole is penetrated by bolts and fixedly installed with nuts.

2. A series type SPE pure water electrolyzer according to claim 1, characterized in that: The negative electrode side end plate (2) and the positive electrode side end plate (16) are both glass cloth laminates or high-strength aluminum materials with a thickness of 5-10 mm; the negative electrode side current collecting plate (4) and the positive electrode side current collecting plate (15) are both metal plain plates with pole ears, using titanium substrates and platinum-plated.

3. A series type SPE pure water electrolyzer according to claim 2, characterized in that: The cathode microporous layer (8) is a specially made stainless steel felt with a filtration accuracy of 40-80 μm.

4. A series type SPE pure water electrolyzer according to claim 3, characterized in that: The cathode current collector (7) and the anode current collector (10) are both multi-layer sintered woven wire meshes, the mesh number of the wire mesh is 20 to 80 meshes; the materials are stainless steel and titanium respectively, wherein the anode current collector (10) is treated by platinum plating.

5. A series type SPE pure water electrolyzer according to claim 4, characterized in that: The membrane electrode (9) adopts a solid polymer proton membrane, and the catalyst is attached to the solid polymer electrolyte membrane by a permeation method.

6. A guide ring for a series type SPE pure water electrolyzer, which is essentially the cathode guide ring (5) and the anode guide ring (12) in the series type SPE pure water electrolyzer according to any one of claims 1 to 5, characterized in that: The cathode guide ring (5) comprises a cathode guide ring body (500), a cathode bolt hole (502) and a cathode sealing groove (503); a hydrogen guide groove (505) is arranged on an outer wall on one side of the top of the cathode guide ring body (500), a cathode hydrogen outlet (504) is provided in the hydrogen guide groove (505), a cathode water outlet (501) is provided on an outer wall on one side of the top of the cathode guide ring body (500), and a cathode water inlet (502) is provided on an outer wall on the other side of the top of the cathode guide ring body (500). 6); the anode guide ring (12) comprises an anode guide ring body (1200), an anode bolt hole (1202) and an anode sealing groove (1203); water guide grooves (1205) are symmetrically arranged on the outer walls on both sides of the top of the anode guide ring body (1200), and an anode water outlet (1201) and an anode water inlet (1206) are respectively opened in the two water guide grooves (1205); and an anode hydrogen outlet (1204) is opened on the outer wall on one side of the top of the anode guide ring body (1200).

7. A guide ring for a series type SPE pure water electrolyzer according to claim 6, characterized in that: The inner diameter of the cathode water outlet (501) is greater than the inner diameter of the cathode water inlet (506), and the inner diameter of the anode water outlet (1201) is greater than the inner diameter of the anode water inlet (1206); the cathode bolt holes (502) and the anode bolt holes (1202) are evenly distributed on the top outer walls of the cathode guide ring body (500) and the anode guide ring body (1200), respectively, and the number of the holes is .

8. A guide ring for a series type SPE pure water electrolyzer according to claim 7, characterized in that: The cathode sealing groove (503) ensures that the cathode hydrogen outlet (504) is connected to the inside of the cathode guide ring body (500), and isolates the cathode water outlet (501) and the cathode water inlet (506); the anode sealing groove (1203) ensures that the anode water outlet (1201) and the anode water inlet (1206) are connected to the inside of the anode guide ring body (1200), and isolates the anode hydrogen outlet (1204); the sealing method of the cathode sealing groove (503) and the anode sealing groove (1203) is glue-dispensing sealing, and the glue used for glue-dispensing is silicone rubber, EPDM or fluororubber; the water guide groove (1205) and the hydrogen guide groove (505) are both provided with transition fillets.

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