Alkaline electrolytic bath pole frame with integrally installed diaphragm

Abstract

According to the alkaline electrolytic cell pole frame with the integrally-installed diaphragm, the diaphragm is arranged on the surface of the pole frame in a covering mode, the pole frame is in the shape of an annular frame, laying steps are annularly arranged on the inner side of the surface of the pole frame, and an oxyhydrogen outlet and an alkaline liquor inlet are formed in the outer portions of the upper side and the lower side of a laying step pair respectively. The outer edge surface of the laying step is annularly provided with an opening limiting groove, the opening limiting groove is formed between the oxygen outlet and the alkali liquor inlet in a separated mode, the outer side surface of the opening limiting groove is provided with the outer edge of the diaphragm, and the outer side of the opening limiting groove and the diaphragm are pressed and fixed through a limiting pressing strip. The diaphragm can be ensured to be flat and tight after being mounted, and the assembly process of the PPS diaphragm is effectively simplified. Through limiting packaging of the PPS diaphragm, the diaphragm and the electrode frame are integrally formed, the packaged bipolar plate can be directly stacked when the electrolytic cell is assembled, so that the assembling procedure is simplified, and in the assembling process, even if assembling deviation occurs, dislocation of internal parts cannot occur in the adjusting process, and therefore the assembling consistency is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of alkaline electrolytic cells, and particularly relates to an alkaline electrolytic cell pole frame integrated with a diaphragm. BACKGROUND

[0002] In recent years, China has vigorously adjusted the energy structure, actively promoted clean energy, and strived to achieve the double carbon goal. Hydrogen energy is an important carrier for achieving the double carbon goal, and green hydrogen plays a crucial role. Currently, green hydrogen is mainly produced by wind-solar coupling alkaline water electrolysis equipment. Mature commercial alkaline electrolytic cells currently use polyphenylene sulfide (PPS) diaphragms. During the assembly of the electrolytic cell, the cut PPS diaphragm needs to be compared and assembled on the step and then laid flat on the pole plate. This process requires multiple people to cooperate to lay the diaphragm as flat as possible in place. Even with the assistance of auxiliary tooling, it is difficult to lay the diaphragm tightly and flat in place due to the flexibility of the PPS diaphragm under the force.

[0003] Moreover, during the assembly of large electrolytic cells, it is inevitable to tilt, and it is easy to cause the diaphragm to be misaligned during adjustment, resulting in internal gas leakage of the electrolytic cell. In addition, during the use of the electrolytic cell, the diaphragm in a relaxed state is more likely to stick to the pole plate, causing uneven flow field and increasing the area of the diaphragm subjected to scouring force, which may cause the diaphragm to fall off during use, thereby causing safety accidents.

[0004] Therefore, an integrated alkaline electrolytic cell pole frame is needed to overcome the problems of time-consuming and labor-intensive assembly of polyphenylene sulfide (PPS) diaphragms for alkaline electrolytic cells and difficulty in assembling them in place. CONTENT OF THE INVENTION

[0005] To address the aforementioned issues, this paper proposes an alkaline electrolyzer electrode frame with integrated diaphragm installation. The electrode frame is annular in shape, with steps forming a ring on the inner side of its surface. Hydrogen / oxygen outlets and an alkali inlet are respectively located on the upper and lower outer sides of the steps. Each step has an annularly shaped opening limiting groove positioned between the oxygen outlet and the alkali inlet. A tensioning ring is located at the inner corner of each opening limiting groove. The oxygen outlet and alkali inlet are symmetrical about the vertical axis of the electrode frame. The oxygen outlet and alkali inlet are respectively connected to… The outlet and inlet are interconnected with the inner side of the electrode frame. The oxygen outlet and the alkaline inlet are symmetrically provided on the front and back sides of the left and right sides, respectively. The outer surface of the opening limiting groove is provided with the outer edge of the diaphragm. The outer side of the opening limiting groove is pressed and fixed to the diaphragm by the limiting strip. This paper provides an integrated electrode frame. During the assembly process, even if there is an assembly deviation, the internal parts will not be misaligned during the adjustment process, thus ensuring the consistency of the assembly and effectively simplifying the assembly process of the PPS diaphragm. The electrode frame is integrally formed by limiting and sealing the PPS diaphragm, and can be directly stacked during the assembly of the electrolytic cell, thus simplifying the assembly process.

[0006] The electrode frame is a circular frame with an oxygen outlet and an alkali inlet in the middle of its surface width. An annular protrusion on the inner side of the oxygen outlet and alkali inlet on the electrode frame surface provides a laying step. The laying step is a protruding, integrated annular boss. An indented limiting groove is provided on the outer arc surface of the laying boss. The outer arc of the laying boss fits into the inner arc edge of the oxygen outlet and alkali inlet. By providing an opening limiting groove on the rear side of the already required laying boss, efficient fixation of the diaphragm is easily achieved, ensuring the integrity of the electrode frame, simplifying assembly, and facilitating adjustment.

[0007] Both the oxygen outlet and the alkali inlet are arc-shaped through-holes. The oxygen outlet is equidistantly located on the upper surface of the electrode frame, and the alkali inlet is equidistantly located on the lower surface of the electrode frame. The oxygen outlet and the alkali inlet are symmetrically arranged with respect to the transverse axis of the electrode plate. The depth of the gas outlet groove and the liquid inlet groove is the same as the depth of the opening limiting groove. Several gas outlet grooves are equidistantly located in front of the oxygen outlet, and a single liquid inlet groove is located in the middle of the front side of the alkali removal inlet.

[0008] The cutting dimensions of the limiting strip are consistent with the opening limiting groove. The material of the limiting strip includes, but is not limited to, sealing materials such as polytetrafluoroethylene, fluororubber, and nylon. This effectively simplifies the assembly process of the PPS diaphragm. The assembly of the PPS diaphragm can be completed simply by positioning, fixing, and embedding.

[0009] The cutting type limiting area protruding at the cutting edge of the diaphragm is aligned with the opening limiting groove, the radius of the limiting area is the inner diameter radius r of the opening limiting groove plus the width of the opening limiting groove plus twice the depth of the opening limiting groove, the PPS diaphragm is embedded in the opening limiting groove through the limiting pressing strip, which can effectively ensure that the PPS is installed in place during the assembly process of the electrolytic cell, and limit the diaphragm from falling off during the subsequent operation process, thereby ensuring the product performance.

[0010] Beneficial effects:

[0011] The PPS diaphragm is embedded in the opening limiting groove through the limiting pressing strip, which can effectively ensure that the PPS is installed in place during the assembly process of the electrolytic cell, and limit the diaphragm from falling off during the subsequent operation process, thereby ensuring the product performance.

[0012] The assembly process of the PPS diaphragm is effectively simplified, and the assembly of the PPS diaphragm can be completed by simple positioning, fixing and embedding.

[0013] Through the limiting packaging of the PPS diaphragm, the bipolar plate is integrally formed, and can be directly stacked during the assembly of the electrolytic cell, thereby simplifying the assembly process.

[0014] An integrated pole frame is provided, and even if there is an assembly deviation during the assembly process, the adjustment process will not cause misalignment of the inner part, thereby ensuring the consistency of the assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a top view of a diaphragm integrated installation alkaline electrolytic cell pole frame;

[0016] Figure 2 is an A-A sectional view of a diaphragm integrated installation alkaline electrolytic cell pole frame;

[0017] Figure 3 is a B-B sectional view of a diaphragm integrated installation alkaline electrolytic cell pole frame;

[0018] Figure 4 is a local enlarged schematic view of a diaphragm integrated installation alkaline electrolytic cell pole frame;

[0019] Figure 5 is a PPS diaphragm cutting of a diaphragm integrated installation alkaline electrolytic cell pole frame;

[0020] In the figure; 1, pole frame, 2, laying step, 3, opening limiting groove, 4, alkali inlet, 5, hydrogen oxygen outlet, 6, gas outlet groove, 7, liquid inlet groove, 8, tensioning ring, 9, diaphragm. DETAILED DESCRIPTION

[0021] In order to deepen the understanding of the utility model, the utility model will be further described in combination with examples and drawings below, and the examples are only used for explaining the utility model and do not constitute the limitation of the protection scope of the utility model.

[0022] Pole frame 1, laying step 2, opening limiting groove 3, lye inlet 4, hydrogen and oxygen gas outlet 5, gas outlet groove 6, liquid inlet groove 7, tensioning ring 8, diaphragm 9.

[0023] As Figure 1 , 2 , 3, 4, 5 are shown;

[0024] The application discloses a diaphragm integrated installation alkaline electrolytic cell pole frame, the surface of the pole frame 1 is covered with a diaphragm 9, the pole frame 1 is in the shape of an annular frame, a laying step 2 is arranged in the form of a ring on the inner side of the surface of the pole frame 1, the outer parts of the upper and lower sides of the laying step 2 are respectively provided with a hydrogen-oxygen gas outlet 5 and an alkali liquid inlet 4, the outer edge surfaces of the laying step 2 are annularly provided with open limiting grooves 3, the open limiting grooves 3 are arranged in a separated manner between the oxygen gas outlet and the alkali liquid inlet 4, the inner side sharp corners of the open limiting grooves 3 are provided with tension clamps 8, the oxygen gas outlet and the alkali liquid inlet 4 are left-right symmetrical with the vertical axis of the pole frame 1 as a reference, the oxygen gas outlet and the alkali liquid inlet 4 are respectively connected with the inner side of the pole frame 1 through a gas outlet groove 6 and a liquid inlet, the front and back sides of the left and right sides of the oxygen gas outlet and the alkali liquid inlet 4 are respectively provided with two gas outlet grooves 6 and liquid inlets 7 which are two-sides symmetrical, the outer side surface of the open limiting groove 3 is provided with the outer edge of the diaphragm 9, the outer side of the open limiting groove 3 is connected with the diaphragm 9 through a limiting pressing strip, the pole frame 1 is a circular ring frame, the middle part of the surface width of the pole frame 1 is provided with the oxygen gas outlet and the alkali liquid inlet 4, the inner side of the oxygen gas outlet and the alkali liquid inlet 4 of the surface of the pole frame 1 is annularly and protrusively provided with the laying step 2, the laying step 2 is in the shape of a protrusive annular integrated boss, the outer circular arc upper surface of the laying boss is concavely provided with the open limiting groove 3, the outer side circular arc of the laying boss is matched with the inner side arc edge of the oxygen gas outlet and the alkali liquid inlet 4, the oxygen gas outlet and the alkali liquid inlet 4 are in the shape of an arc-shaped through groove, the oxygen gas outlet circular arc is equidistantly arranged on the upper side of the surface of the pole frame 1, the alkali liquid inlet 4 circular arc is equidistantly arranged on the lower side of the surface of the pole frame 1, the oxygen gas outlet and the alkali liquid inlet 4 are symmetrically arranged with the pole plate horizontal axis as a reference, the depths of the gas outlet groove 6 and the liquid inlet groove 7 are the same as the depth of the open limiting groove 3, the gas outlet groove 6 is equidistantly arranged on the front side of the oxygen gas outlet, the liquid inlet groove 7 is a single one arranged on the front side middle part of the alkali liquid inlet, the limiting pressing strip is cut to the same size as the open limiting groove 3, the material of the limiting pressing strip includes but is not limited to polytetrafluoroethylene, fluororubber, nylon and other sealing materials, the limiting area is protrusively and cutly arranged on the outer edge of the diaphragm 9, the limiting area is aligned with the open limiting groove 3, the radius of the limiting area is the inner diameter radius r of the open limiting groove 3 plus the width of the open limiting groove 3 plus twice the depth of the open limiting groove 3.

[0025] Implementation example

[0026] The PPS diaphragm 9 is arranged along one side of the bipolar plate (single side (negative or positive side)), the outer circle line of the laying step 2 is provided with an opening limiting groove 3, a limiting pressing strip is arranged in the limiting groove, the edge of the PPS diaphragm 9 is pressed into the limiting groove and is pressed tightly through the limiting pressing strip, after the PPS diaphragm 9 is cut, the embedded groove part is further cut off according to the radius r of the inner circle 202 in the limiting groove in the area without the limiting groove, finally, the edge is sealed, then the PPS diaphragm 9 after the cutting and sealing is compared with the tensioning ring 8 at the sharp corner of the opening limiting groove 3, the PPS diaphragm 9 is fixed and straightened through the U-shaped clamping, finally, the edge of the PPS diaphragm 9 is embedded into the limiting groove through the limiting pressing strip and is fixed.

[0027] The PPS diaphragm is effectively guaranteed to be installed in place in the bipolar plate assembly process, the diaphragm 9 is effectively guaranteed not to fall off in the subsequent operation process, the PPS diaphragm 9 assembly process is effectively simplified, the integrated polar frame 1 design not only simplifies the assembly process, but also does not cause the internal parts to be misaligned in the adjustment process even if an assembly deviation occurs in the assembly process, thereby guaranteeing the consistency of the assembly.

[0028] The above only describes preferred embodiments of the utility model and is not used to limit the utility model, any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A diaphragm-integrated installation alkaline electrolyzer pole frame, the surface of the pole frame is covered with a diaphragm, characterized in that, The electrode frame is annular in shape, with a step-like structure on the inner side of the frame surface. Hydrogen and oxygen outlets and an alkali inlet are respectively located on the upper and lower outer sides of the step-like structure. An open limiting groove is annularly located on the outer edge of each step-like structure. The opening limiting groove is positioned between the oxygen outlet and the alkali inlet. A tensioning ring is located at the inner corner of each opening limiting groove. The oxygen outlet and alkali inlet are symmetrical about the vertical axis of the electrode frame. They are connected to the inner side of the electrode frame via an outlet groove and a liquid inlet, respectively. The front and rear sides of the left and right sides of the oxygen outlet and alkali inlet are symmetrically equipped with outlet grooves and liquid inlets. The outer surface of the opening limiting groove has the outer edge of a diaphragm, and the outer side of the opening limiting groove is pressed and fixed to the diaphragm by a limiting strip.

2. The membrane-integrated mounting alkaline electrolyzer polar frame according to claim 1, characterized in that, The electrode frame is a circular frame with an oxygen outlet and an alkali inlet in the middle of its surface width. The inner side of the oxygen outlet and alkali inlet on the surface of the electrode frame is provided with a circumferential protrusion for laying.

3. The membrane-integrated mounting alkaline electrolyzer polar frame according to claim 1, characterized in that, The paving step is a protruding, ring-shaped integrated boss. The outer arc of the paving boss has an indented limiting groove. The outer arc of the paving boss fits into the inner arc of the oxygen outlet and the alkali inlet.

4. The membrane-integrated mounting alkaline electrolyzer polar frame according to claim 1, characterized in that, The oxygen outlet and alkali inlet are both arc-shaped through-holes. The oxygen outlet is equidistantly located on the upper surface of the electrode frame, and the alkali inlet is equidistantly located on the lower surface of the electrode frame. The oxygen outlet and alkali inlet are symmetrically arranged with respect to the transverse axis of the electrode plate.

5. The membrane-integrated mounting alkaline electrolyzer polar frame according to claim 1, characterized in that, The depths of the gas outlet groove and the liquid inlet groove are the same as the depth of the opening limiting groove. The gas outlet grooves are arranged in a plurality of equal distances in front of the oxygen outlet, and the liquid inlet groove is a single one located in the middle of the front side of the alkali removal liquid inlet.

6. The membrane-integrated mounting alkaline electrolyzer polar frame according to claim 1, characterized in that, The cutting dimensions of the limiting strip are consistent with the opening limiting groove, and the material of the limiting strip includes, but is not limited to, polytetrafluoroethylene, fluororubber, and nylon sealing materials.

7. The membrane-integrated mounting alkaline electrolyzer polar frame according to claim 1, characterized in that, The diaphragm has a protruding cutting edge with a limiting area, which is aligned with the opening limiting groove. The radius of the limiting area is the inner diameter radius r of the opening limiting groove + the width of the opening limiting groove + twice the depth of the opening limiting groove.

Images