Electrolytic cell permeable membrane

Abstract

The utility model relates to a permeable membrane of an electrolytic bath. The annular membrane frame is clamped between the pole frames in a sealing manner, a membrane is arranged in a membrane frame ring, and an annular bulge and a breast bulge are arranged on the membrane in a protruding manner; a liquid inlet through hole is formed in the lower portion of the membrane frame in a penetrating mode, a concave liquid inlet through groove is formed in the lower portion of the radial end face of the membrane frame, and the liquid inlet through groove is communicated with the membrane frame inner ring and the liquid inlet through groove. A first row of liquid discharging through holes and a second row of liquid discharging through holes are formed in the upper portion of the membrane frame in a penetrating mode, a first concave liquid discharging through groove and a second concave liquid discharging through groove are formed in the upper portion of the radial end face of the membrane frame and formed in the radial end faces of the two sides of the membrane frame respectively, and the first liquid discharging through groove is communicated with an inner ring of the membrane frame and the first liquid discharging through holes. And the second liquid discharge through groove is communicated with the membrane frame inner ring and the second liquid discharge through hole. According to the permeable membrane of the electrolytic bath, the ionization efficiency of the electrode plates is ensured, the gas production rate is increased, and the service life of the permeable membrane is prolonged; and the liquid passing groove is easier to process.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen energy production, in particular to an electrolytic cell permeable membrane. Background Art

[0002] Hydrogen electrolysis is a technology that decomposes water into hydrogen and oxygen through an electrochemical process. The process of hydrogen electrolysis is to electrolyze water molecules into hydrogen ions and hydroxide ions under the action of direct current. The hydrogen ions further combine to form hydrogen, while the hydroxide ions lose electrons at the anode to form oxygen.

[0003] At present, the mainstream process technologies for hydrogen production by electrolysis mainly include: alkaline water electrolysis technology and PEM water electrolysis technology. Alkaline water electrolysis technology uses potassium hydroxide or sodium hydroxide solution as the electrolyte, and transports negative ions through a porous permeable membrane to separate hydrogen and oxygen; PEM water electrolysis technology uses a proton exchange membrane as a key component of the electrolyzer, which can efficiently produce a large amount of hydrogen without carbon dioxide emissions. Among them, alkaline water electrolysis technology has a commercial history of nearly 100 years worldwide due to its high maturity and low acquisition cost. The technology is relatively mature, the electrolyzer equipment has a long life, and the cost is relatively low. In contrast, PEM water electrolysis technology has developed rapidly in the past decade. Although it occupies a large area, it has the advantages of higher energy conversion efficiency and longer service life.

[0004] However, the conventional electrolytic hydrogen production device still has the following shortcomings:

[0005] 1. The permeable membrane is pressed tightly by the electrode plate, resulting in poor ionization effect and affecting gas production; and the squeezed permeable membrane has a short life;

[0006] 2. The processing of the liquid trough is complicated. Utility Model Content

[0007] In order to solve the technical problems existing in the background technology, the utility model provides an electrolytic cell permeable membrane to ensure the ionization efficiency of the electrode plate, improve the gas production, and extend the life of the permeable membrane; the liquid tank is easier to process.

[0008] The technical solution adopted by the utility model is:

[0009] An electrolytic cell permeable membrane, comprising:

[0010] The sealing clamp is arranged in an annular membrane frame between the pole frames, a membrane sheet is arranged in the ring of the membrane frame, and a ring convexity and a nipple convexity are arranged on the membrane sheet;

[0011] The lower part of the membrane frame is provided with a liquid inlet through hole along its axial direction, and the lower part of the radial end surface of the membrane frame is provided with an inwardly concave liquid inlet through groove, and the liquid inlet through groove is connected with the inner ring of the membrane frame and the liquid inlet through groove;

[0012] The upper part of the membrane frame is provided with a first drainage hole and a second drainage hole along its axial direction, and the upper part of the radial end surface of the membrane frame is provided with a first concave drainage groove and a second drainage groove. The first drainage groove and the second drainage groove are respectively arranged on the radial end surfaces on both sides of the membrane frame, the first drainage groove is connected with the inner ring of the membrane frame and the first drainage hole, and the second drainage groove is connected with the inner ring of the membrane frame and the second drainage hole.

[0013] Furthermore, a concave sealing groove is provided at the edge of the membrane frame for accommodating an annular sealing gasket.

[0014] Furthermore, the annular protrusion is arranged in a concentric ring shape with the center of the diaphragm as a circle.

[0015] Furthermore, the upper and lower parts of the annular protrusion are provided with separation gaps to facilitate the circulation of electrolyte.

[0016] Furthermore, the nipple is arranged in the ring of the annular convexity, and a plurality of nipples are arranged in a circular array distributed along the center of the diaphragm.

[0017] Furthermore, the protruding ends of the annular protrusion and the nipple protrusion are flush with the radial end surface of the membrane frame.

[0018] Furthermore, two groups of liquid inlet through holes are symmetrically arranged along the central axis of the membrane frame.

[0019] Furthermore, two groups of the liquid inlet grooves are provided and are respectively located at two ends of the liquid inlet through hole.

[0020] Furthermore, the first liquid drainage through hole and the second liquid drainage through hole are symmetrically arranged along the central axis of the membrane frame.

[0021] Furthermore, the liquid inlet through hole, the first liquid discharge through hole, and the second liquid discharge through hole are connected to the liquid through hole on the pole frame;

[0022] The liquid inlet groove, the first liquid discharge groove and the second liquid discharge groove are arranged in a semicircular tube shape and are matched with the liquid passage grooves at the liquid passage holes on the pole frame respectively.

[0023] The advantages of the electrolytic cell permeable membrane of the utility model are:

[0024] 1. Improve the contact with the plate through the ring convexity and nipple convexity to reduce the contact resistance;

[0025] 2. The protruding nipple and the semicircular ring convex with separation gap prevent the contact between the plate and the permeable membrane, increase the gas production, prolong the permeable membrane, reduce the generation of cavitation, and improve safety;

[0026] 3. The semi-circular tubular shapes of the liquid inlet groove, the first liquid discharge groove and the second liquid discharge groove facilitate the placement of the membrane frame and make it easier to perform mechanical processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation of the utility model, the drawings required in the specific implementation are briefly introduced below. The drawings in the following description are implementations of the utility model.

[0028] Figure 1 This is a general three-dimensional schematic diagram of an electrolytic cell permeable membrane provided by an example of the utility model;

[0029] Figure 2 This is a schematic diagram of the overall front view of an electrolytic cell permeable membrane provided by an example of the utility model;

[0030] Figure 3 This utility model example Figure 2 An enlarged three-dimensional schematic diagram of part A in the middle;

[0031] Figure 4 This utility model example Figure 2 An enlarged stereoscopic schematic diagram of part B in the figure.

[0032] In the figure:

[0033] 10. membrane frame, 11. diaphragm, 12. sealing tank,

[0034] 21. Ring convexity, 22. Nipple convexity,

[0035] 30. Liquid inlet hole, 31. Liquid inlet slot,

[0036] 41. The first liquid discharge through hole, 42. The second liquid discharge through hole,

[0037] 51. A first liquid discharge groove, 52. A second liquid discharge groove. DETAILED DESCRIPTION

[0038] In order to more clearly and explicitly illustrate the specific implementation purpose and implementation method of the utility model, the technical solution of the utility model will be fully described below. The described embodiment is a part of the embodiment of the utility model, not all the embodiments. Without making creative work, all other embodiments based on the embodiment described in the utility model belong to the protection scope of the utility model.

[0039] The utility model discloses an electrolytic cell permeable membrane, such as Figure 1 , Figure 2 As shown, including:

[0040] The sealing clamp is an annular membrane frame 10 between the pole frames, a membrane sheet 11 is arranged inside the ring of the membrane frame 10, and an inwardly concave sealing groove 12 is arranged at the edge of the membrane frame 10 to accommodate an annular sealing gasket, which is clamped and sealed by the pole frame and the membrane frame 10.

[0041] An annular protrusion 21 and a nipple 22 are protrudingly provided on the diaphragm 11, and the protruding ends of the annular protrusion 21 and the nipple 22 are flush with the radial end surface of the membrane frame 10; the annular protrusion 21 is arranged as a concentric ring with the center of the diaphragm 11 as a circle, and the upper and lower parts of the annular protrusion 21 are provided with separation gaps to facilitate the circulation of electrolyte; the nipple 22 is arranged in the ring of the annular protrusion 21, and a plurality of nipples 22 are distributed in a circular array along the center of the diaphragm 11.

[0042] The lower part of the membrane frame 10 is provided with a liquid inlet through hole 30 along its axial direction. Figure 3 As shown, the liquid inlet holes 30 are symmetrically arranged in two groups along the central axis of the membrane frame 10, and a concave liquid inlet groove 31 is arranged at the lower part of the radial end surface of the membrane frame 10. The liquid inlet groove 31 is arranged in two groups and is respectively located at the two ends of the liquid inlet hole 30, and the liquid inlet groove 31 is connected with the inner ring of the membrane frame 10 and the liquid inlet groove 31.

[0043] The upper part of the membrane frame 10 is provided with a first liquid discharge through hole 41 and a second liquid discharge through hole 42 along its axial direction. Figure 4 As shown, the first drainage hole 41 and the second drainage hole 42 are symmetrically arranged along the central axis of the membrane frame 10; the upper part of the radial end surface of the membrane frame 10 is provided with a concave first drainage groove 51 and a second drainage groove 52, and the first drainage groove 51 and the second drainage groove 52 are respectively arranged on the radial end surfaces on both sides of the membrane frame 10, the first drainage groove 51 is connected with the inner ring of the membrane frame 10 and the first drainage hole 41, and the second drainage groove 52 is connected with the inner ring of the membrane frame 10 and the second drainage hole 42.

[0044] The liquid inlet hole 30, the first liquid discharge hole 41, and the second liquid discharge hole 42 are connected to the liquid passage hole on the pole frame; the liquid inlet groove 31, the first liquid discharge groove 51, and the second liquid discharge groove 52 are set to be semicircular tubes and respectively match the liquid passage grooves at the liquid passage hole on the pole frame.

[0045] Based on the above, the embodiment of the electrolytic cell permeable membrane of the utility model is inspired. Through the above description, relevant staff can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of the utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electrolytic cell permeable membrane, characterized in that: include: A sealing clamp is provided on an annular membrane frame (10) between the pole frames, a membrane sheet (11) is provided in the ring of the membrane frame (10), and a ring protrusion (21) and a nipple protrusion (22) are provided on the membrane sheet (11); A liquid inlet through hole (30) is provided in the lower part of the membrane frame (10) along its axial direction, and a concave liquid inlet through groove (31) is provided in the lower part of the radial end surface of the membrane frame (10), and the liquid inlet through groove (31) is connected with the inner ring of the membrane frame (10) and the liquid inlet through groove (31); The upper part of the membrane frame (10) is provided with a first liquid drainage hole (41) and a second liquid drainage hole (42) penetrating along its axial direction, and the upper part of the radial end surface of the membrane frame (10) is provided with a first liquid drainage groove (51) and a second liquid drainage groove (52) which are concave. The first liquid drainage groove (51) and the second liquid drainage groove (52) are respectively arranged on the radial end surfaces on both sides of the membrane frame (10), the first liquid drainage groove (51) is connected to the inner ring of the membrane frame (10) and the first liquid drainage hole (41), and the second liquid drainage groove (52) is connected to the inner ring of the membrane frame (10) and the second liquid drainage hole (42).

2. The electrolytic cell permeable membrane according to claim 1, characterized in that: An inwardly concave sealing groove (12) is provided at the edge of the membrane frame (10) for accommodating an annular sealing gasket.

3. The electrolytic cell permeable membrane according to claim 1, characterized in that: The annular protrusion (21) is arranged in a concentric ring shape with the center of the diaphragm (11) as a circle.

4. The electrolytic cell permeable membrane according to claim 3, characterized in that: The upper and lower parts of the annular protrusion (21) are provided with separation gaps to facilitate the circulation of electrolyte.

5. The electrolytic cell permeable membrane according to claim 4, characterized in that: The nipple (22) is arranged in the ring of the annular protrusion (21), and a plurality of nipples (22) are arranged in a circular array distributed along the center of the diaphragm (11).

6. The electrolytic cell permeable membrane according to claim 5, characterized in that: The protruding ends of the annular protrusion (21) and the nipple protrusion (22) are flush with the radial end surface of the membrane frame (10).

7. The electrolytic cell permeable membrane according to claim 1, characterized in that: The liquid inlet through holes (30) are symmetrically arranged in two groups along the central axis of the membrane frame (10).

8. The electrolytic cell permeable membrane according to claim 7, characterized in that: The liquid inlet grooves (31) are provided in two groups and are respectively located at the two ends of the liquid inlet through hole (30).

9. The electrolytic cell permeable membrane according to claim 8, characterized in that: The first liquid drainage through hole (41) and the second liquid drainage through hole (42) are symmetrically arranged along the central axis of the membrane frame (10).

10. An electrolytic cell permeable membrane according to claim 9, characterized in that: The liquid inlet through hole (30), the first liquid discharge through hole (41), and the second liquid discharge through hole (42) are connected to the liquid through hole on the pole frame; The liquid inlet groove (31), the first liquid discharge groove (51), and the second liquid discharge groove (52) are configured in a semicircular tube shape and are matched with the liquid passage grooves at the liquid passage holes on the pole frame, respectively.

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