CN215757650U - Electrolytic bath - Google Patents

Abstract

The utility model provides an electrolytic cell which comprises two opposite end pole structures, a middle polar plate and a plurality of electrolytic units, wherein the middle polar plate and the plurality of electrolytic units are tightly pressed between the two end pole structures, each adjacent electrolytic units are isolated by an isolation structure, the isolation structure comprises a partition plate and an isolation frame sleeved on the circumferential outer side of the partition plate, the isolation frame is provided with an electrolyte inlet and an electrolyte outlet, comb tooth structures are arranged in the directions of the electrolyte inlet and the electrolyte outlet, which are close to the center of the partition plate, and the thickness of comb teeth and gaps of the comb tooth structures is between 3 mm and 5 mm. Adopt as above structure, inside electrolyte can flow in or flow out electrolysis unit through the space of the broach structure of electrolyte import and electrolyte export, when electrolyte import and electrolyte export received the extrusion, because broach and the space of broach structure are comparatively intensive, the broach can butt relative isolation frame, and the broach structure can not produce deformation, and the flow of electrolyte import and electrolyte export just can not diminish or block up.

Description

Electrolytic bath

Technical Field

The utility model relates to the technical field of electrolytic hydrogen production equipment, in particular to an electrolytic cell.

Background

The electrolytic hydrogen production process generally adopts a diaphragm type aqueous solution electrolytic cell to produce hydrogen, after the electrolyte is injected into the electrolytic cell, direct current is communicated with the electrolytic cell, and the anode and the cathode in the electrolytic cell can respectively generate oxygen and hydrogen.

The electrolytic cell comprises a main polar plate, an electrolyte inlet and an electrolyte outlet are arranged on the outer side of the circumference of the main polar plate, the electrolyte inlet and the electrolyte outlet are of a comb tooth structure generally, and gaps among comb teeth in the comb tooth structure can be used for electrolyte to enter and exit. The electrolysis trough is at the sealed in-process of installation, need the installation to compress tightly the sealed pad on main polar plate circumference outer edge, and sealed pad extrusion main polar plate leads to setting up and receives the extrusion equally in main polar plate's electrolyte import and electrolyte export, and because the broach structure is comparatively sparse, the broach structure just can produce deformation, causes electrolyte import and electrolyte export flow to diminish, takes place to block up even.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide an electrolytic cell in which the flow rate of the electrolyte inlet and the electrolyte outlet is not reduced or blocked by squeezing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an electrolytic cell, wherein an electrolyte inlet and an electrolyte outlet are not reduced in flow or blocked due to extrusion.

In order to solve the technical problems, the utility model provides an electrolytic cell which comprises two opposite end pole structures, and a middle polar plate and a plurality of electrolytic units which are tightly pressed between the two end pole structures, wherein each adjacent electrolytic unit is isolated by an isolation structure, the isolation structure comprises a partition plate and an isolation frame sleeved on the circumferential outer side of the partition plate, the isolation frame is provided with an electrolyte inlet and an electrolyte outlet, comb tooth structures are arranged in the directions of the electrolyte inlet and the electrolyte outlet, which are close to the center of the partition plate, and the thickness of comb teeth and gaps of the comb tooth structures is between 3 mm and 5 mm.

Adopt as above structure, inside electrolyte can flow in or flow out electrolysis unit through the space of the broach structure of electrolyte import and electrolyte export, when electrolyte import and electrolyte export received the extrusion, because broach and the space of broach structure are comparatively intensive, the broach can butt relative isolation frame, and the broach structure can not produce deformation, and the flow of electrolyte import and electrolyte export just can not diminish or block up.

Optionally, keep apart the frame both sides and all be equipped with sealed waterline, it is adjacent through relative between the isolation structure sealed waterline compresses tightly there is sealed the pad.

Optionally, sealed waterline is embedded structure, including a plurality of draw-in grooves, crest line and set up in the edge at sealed waterline both ends, the width of draw-in groove is between 10 millimeters to 20 millimeters, the width of crest line is between 0.6 millimeters to 1 millimeter, the edge with the difference in height of draw-in groove bottom is between 1 millimeter to 1.5 millimeters.

Optionally, the electrolysis cell comprises a membrane comprising a layer of high polymer woven fabric covered on both sides with a layer of metal oxide.

Optionally, the membrane has a thickness in a range of 500 to 800 microns.

Optionally, the electrolysis unit further includes a first polar plate and a second polar plate respectively disposed on two sides of the diaphragm, the first polar plate and the second polar plate are both made of nickel-based materials, and both are in a 3D network structure.

Optionally, the end pole structure includes a tension bolt, an elastic member, an end clamping plate and an end pole plate, and the tension bolt and the elastic member of the end pole structure can be matched to compress the end clamping plate and the end pole plate of the end pole structure.

Optionally, papillary structures are uniformly distributed on both sides of the partition plate.

Drawings

FIG. 1 is an enlarged schematic structural view of a comb tooth structure of an electrolytic cell provided in an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of an electrolytic cell provided in the embodiment of the present invention;

FIG. 3 is a schematic view of a first embodiment of the isolation structure of FIG. 2;

FIG. 4 is a schematic perspective view of a second embodiment of the isolation structure of FIG. 2;

FIG. 5 is an enlarged schematic view of the seal water line of FIG. 3;

FIG. 6 is an enlarged partial schematic view of the electrolysis cell, separator structure and intermediate plate of FIG. 2;

figure 7 is a side view of the cell of figure 2.

The reference numerals in fig. 1-7 are illustrated as follows:

1 end utmost point structure, 11 tie bolts, 12 elastic component, 13 end splint, 14 end polar plates, 15 supporting parts, 2 electrolysis unit, 21 diaphragms, 22 first polar plate, 23 second polar plate, 3 isolation structure, 31 baffle, 32 isolation frame, 33 sealed waterline, 331 draw-in groove, 332 crest line, 333 edge, 34 sealed pad, 35 electrolyte import, 36 electrolyte export, 37 broach structure, broach 371, 372 gaps, 4 middle polar plates.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-4, fig. 1 is an enlarged schematic structural view of a comb structure of an electrolytic cell according to an embodiment of the present invention; FIG. 2 is a schematic view of the structure of an electrolytic cell provided in the embodiment of the present invention; FIG. 3 is a schematic view of a first embodiment of the isolation structure of FIG. 2; fig. 4 is a perspective view of a second embodiment of the isolation structure of fig. 2.

The embodiment of the utility model provides an electrolytic cell, which comprises two opposite end pole structures 1, and a middle polar plate 4 and a plurality of electrolytic units 2 which are tightly pressed between the two end pole structures 1, wherein each adjacent electrolytic unit 2 is isolated by an isolation structure 3, the isolation structure 3 comprises a partition plate 31 and an isolation frame 32 which is sleeved on the circumferential outer side of the partition plate 31, the isolation frame 32 is provided with an electrolyte inlet 35 and an electrolyte outlet 36, the electrolyte inlet 35 and the electrolyte outlet 36 are both provided with a comb tooth structure 37 in the direction close to the center of the partition plate 31, and the thickness of comb teeth 371 and gaps 372 of the comb tooth structure 37 is between 3 mm and 5 mm.

Adopt like above structure, electrolyte can flow in or flow out electrolysis unit 2 through the space 372 of the broach structure 37 of electrolyte import 35 and electrolyte export 36, when electrolyte import 35 and electrolyte export 36 received the extrusion, because broach 371 and the space 372 of broach structure 37 are comparatively intensive, broach 371 can butt relative isolation frame 32, makes broach structure 37 whole not produce deformation, and the flow of electrolyte import 35 and electrolyte export 36 just can not reduce, more can not appear the jam condition.

An electrolyte inlet 35 and an electrolyte outlet 36 are provided in the separation frames 32, and after each separation frame 32 is compressed, the electrolyte can flow into or out of the electrolytic unit 2 through the comb tooth structure 37.

As shown in fig. 3, in the first embodiment of the isolation structure 3, two electrolyte inlets 35 and two electrolyte outlets 36 are respectively disposed on two sides of the isolation frame 32, each electrolyte inlet 35 and each electrolyte outlet 36 are symmetrically disposed and have the same structure, and only names are different to distinguish purposes, and after each isolation frame 32 is pressed, both sides of each electrolyte inlet 35 and each electrolyte outlet 36 can be communicated with the comb tooth structure 37.

In the second embodiment of the isolation structure 3, as shown in fig. 4, two electrolyte inlets 35 and two electrolyte outlets 36 are also respectively disposed on two sides of the isolation frame 32, and both sides of each electrolyte inlet 35 and electrolyte outlet 36 can also communicate with the comb tooth structure 37.

Of course, in addition to the above two embodiments, the comb tooth structures 37 of the electrolyte inlets 35 and the electrolyte outlets 36 may be arranged in other manners, and the present invention is not limited thereto, as long as both sides of the electrolyte inlets 35 and the electrolyte outlets 36 can communicate with the comb tooth structures 37 after the isolation frames 32 are pressed. In addition, the arrangement positions and the arrangement number of the electrolyte inlets 35 and the electrolyte outlets 36 are not limited in the present invention, as long as the two can supply the electrolyte to enter and exit.

Referring to fig. 1, in the present embodiment, two end-pole structures 1 compress a middle pole plate 4, a plurality of electrolysis units 2, and a plurality of isolation structures 3 therebetween, the middle pole plate 4 is disposed at the center between the two end-pole structures 1, and the electrolysis units 2 and the isolation structures 3 are disposed on two sides in an overlapping manner. The two sides of the middle polar plate 4 are respectively provided with the isolation structures 3 in a close-fitting manner, and then the electrolysis units 2 and the isolation structures 3 are sequentially overlapped, so that the two electrolysis units 2 with the shortest distance from the two sides of the middle polar plate 4 can form a normal electrolysis environment; the end pole structures 1 at two ends comprise end pole plates 14, the two end pole plates 14 are arranged oppositely and different from the middle pole plate 4, the end pole plates 14 are firstly provided with the electrolytic units 2 towards one side of the center, then one side is overlapped to be provided with the isolation structures 3 and the electrolytic units 2, the end pole plates 14 can be matched with the isolation structure 3 closest to the center, and therefore the electrolytic units 2 between the end pole plates and the isolation structures can form a normal electrolytic environment.

It can be understood that what number of the electrolysis units 2 and the isolation structures 3 are specifically included in the electrolysis cell can be freely set according to the requirements in practical application, the utility model is not limited, if the number of the electrolysis units 2 and the isolation structures 3 is large, the voltage required for the electrolysis is high, and the voltage required for the communication between the middle pole plate 4 and the end pole structure 1 is high; if the number of electrolysis cells 2 and isolation structures 3 is small, the voltage required for communication between the intermediate plate 4 and the end plate structure 1 is low. In addition, the sizes and specific structures of the end pole structure 1, the electrolysis unit 2, the isolation structure 3 and the middle pole plate 4 are not limited in the utility model, as long as the end pole structure can electrolyze the electrolyte after being electrified to generate a corresponding product.

In this embodiment, the two sides of the isolation frame 32 are both provided with sealing waterlines 33, and the adjacent isolation structures 3 are compressed by the opposite sealing waterlines 33 to form sealing gaskets 34.

The partition plates 31 and the partition frames 32 can separate the adjacent electrolysis units 2 to prevent the electrolysis units 2 from interfering with each other; the two adjacent isolation frames 32 can press the sealing gasket 34 between the two, and the sealing gasket 34 is pressed between the sealing waterlines 33 which are oppositely arranged, so as to seal each electrolysis unit 2, wherein the material of the sealing gasket 34 can be fluorine-based plastic. Of course, the manner of sealing between the separators 3 is not limited in the present invention as long as it enables the respective cells 2 to be kept sealed, and the whole of the electrolytic cell to be kept sealed as well.

Referring to fig. 5, fig. 5 is an enlarged schematic view of the sealing water line in fig. 3.

In this embodiment, the sealing waterline 33 is an embedded structure, and includes a plurality of clamping grooves 331, ridge 332 and the edge 333 that sets up in sealing waterline 33 both ends, and the width of clamping groove 331 is between 10 millimeters to 20 millimeters, and the width of ridge 332 is between 0.6 millimeters to 1 millimeter, and the difference in height of edge 333 and the clamping groove 331 bottom is between 1 millimeter to 1.5 millimeters.

It should be noted that, the sealing waterline 33 in the prior art is a structure that a V-shaped groove is arranged at every fixed distance, a plurality of V-shaped grooves form a complete sealing waterline 33, and the installation process of the sealing gasket 34 installed between the adjacent sealing waterlines 33 is as follows: firstly, clamping the sealing gaskets 34 between every two adjacent sealing waterlines 33, tightly pressing each part by the end pole structures 1 at two ends, and introducing steam into the electrolytic cell from the electrolyte inlet 35 to check whether the air leakage condition exists; then the end pole structures 1 at the two ends are disassembled, and whether the sealing gasket 34 is pressed into a shape fitting the sealing waterline 33 or not is checked; if the gasket 34 is not pressed to fit the shape of the seal water line 33, the above steps of pressing, steaming, checking for gas leakage, and checking the shape of the gasket 34 are repeated until the gasket 34 is completely fitted to the seal water line 33, and the step is usually repeated two or three times to complete the installation.

After the structure of this embodiment is adopted, the sealing gasket 34 can be more effectively pressed into the clamping grooves 331 of the sealing waterline 33, and the ridge 332 is arranged between the clamping grooves 331, so that the sealing gasket 34 is more tightly attached, and the sealing performance is improved. In this embodiment, the width of the clamping groove 311 is preferably 10 millimeters, the width of the ridge line 332 is preferably 0.6 millimeter, the height difference between the edge 333 and the bottom of the clamping groove 331 is preferably 1 millimeter, the sealing gasket 34 and the sealing waterline 33 can be attached more closely, the sealing gasket 34 is less prone to being separated, the sealing performance is improved, the electrolytic cell can adapt to the operation condition of higher pressure, and the subsequent energy consumption required for hydrogen compression is reduced.

Besides, because the size of the sealing waterline 33 is fixed, in practical application, the sealing gasket 34 can be shaped into a shape fitting the sealing waterline 33 during production, so that the mounting process of the sealing gasket 34 can be improved, the sealing gasket 34 is directly fitted between the adjacent sealing waterlines 33 in mounting, only the end pole structures 1 at two ends are required to be pressed tightly, and steam is introduced into the electrolytic cell to detect whether air leakage exists, the steps are not required to be repeated for repeated mounting, and the electrolytic cell can be directly used.

Referring to fig. 6, fig. 6 is a partially enlarged schematic view of the electrolysis unit, the isolation structure and the middle plate of fig. 2.

In this embodiment, the electrolytic cell 2 includes a separator 21, and the separator 21 includes a high polymer woven fabric layer, both sides of which are covered with metal oxide layers.

The diaphragm 21 made of the material has lower voltage drop, can improve the energy conversion efficiency, requires lower voltage under the same current magnitude, and can reduce the overall energy consumption of the electrolytic cell. In addition, the diaphragm 21 has lower voltage drop and can bear higher current density, under the condition that the number of the electrolysis units 2 and the input total current are not changed, the same electrolysis efficiency as the original electrolysis cell can be achieved only by the lower electrode area, namely, the electrolysis process can be completed only by the electrolysis unit 2 with smaller volume, and because the volume of the electrolysis unit 2 is reduced, the volumes of the end pole structure 1, the isolation structure 3 and the middle pole plate 4 can be reduced along with the reduction, so that the overall cost of the electrolysis cell is indirectly reduced.

Specifically, the diaphragm 21 uses an ultrathin polyphenylene sulfide felt as a supporting framework, and polymer resin and a metal oxide layer are sprayed on both sides according to the required thickness, wherein the metal oxide layer is preferably a zirconia-based multi-component oxide, and the material has a lower voltage drop and can further improve the energy conversion efficiency.

In the present embodiment, the thickness of the diaphragm 21 ranges from 500 micrometers to 800 micrometers. The diaphragm 21 under the condition of the thickness has better energy conversion efficiency, and can effectively separate the first polar plate 22 and the second polar plate 23 at two sides, so that each electrolytic unit 2 can maintain higher-efficiency electrolysis and has longer service life.

It will be appreciated that the diaphragm 21 may be of other materials, configurations and thicknesses than those described above, and the present invention is not limited thereto, as long as it achieves the same technical effects as described above.

In this embodiment, the electrolysis unit 2 further includes a first polar plate 22 and a second polar plate 23 respectively disposed on two sides of the diaphragm 21, the first polar plate 22 and the second polar plate 23 are made of nickel-based materials, and both of the first polar plate 22 and the second polar plate 23 are in a 3D network structure.

Specifically, as shown in fig. 6, the first electrode plate 22 and the second electrode plate 23 are respectively disposed on two sides of the diaphragm 21 in a close contact manner, so that zero-pole-distance contact between the electrodes and the diaphragm material is realized, contact resistance is reduced, and electrolysis efficiency is improved. The first polar plate 22 and the second polar plate 23 are made of nickel-based materials, so that the contact resistance between the first polar plate and the diaphragm 21 can be further reduced, the voltage drop of the diaphragm 21 is reduced, the energy conversion efficiency is improved, and the electrolysis efficiency is further improved; the first polar plate 22 and the second polar plate 23 both adopt a 3D network structure, the specific surface area of the structure is high, the active area of the electrode can be increased during electrolysis, the active sites of the electrode can be increased, the operating conditions of high current and high current density can be met, and the output of electrolysis products can be increased.

In this embodiment, the first plate 22 and the second plate 23 are substantially the same in structure and material, and only have different names to distinguish the positive electrode and the negative electrode during electrolysis, as shown in fig. 6, in the electrolysis unit 2 on the left side of the middle plate 4, the first plate 22 is disposed on the left side of the diaphragm 21, the second plate 23 is disposed on the right side of the diaphragm 21, and in the electrolysis unit 2 on the right side of the middle plate 4, the first plate 22 is disposed on the right side of the diaphragm 21, and the second plate 23 is disposed on the left side of the diaphragm 21. That is, if the middle plate 4 is used as a positive electrode and the end plates 14 on both sides are used as negative electrodes, the first plate 22 on the left side of the diaphragm 21 is a positive electrode in the electrolysis cell 2 on the left side of the middle plate 4, the second plate 23 on the right side of the diaphragm 21 is a negative electrode, the first plate 22 on the right side of the diaphragm 21 is a positive electrode in the electrolysis cell 2 on the right side of the middle plate 4, and the second plate 23 on the left side of the diaphragm 21 is a negative electrode.

It is understood that, in practical applications, the first electrode plate 22 and the second electrode plate 23 may be made of other materials and structures, and they may be made of the same structure or different structures, and the present invention is not limited thereto, as long as they can form the electrolysis unit 2 with the diaphragm 21, and electrolyze the electrolyte to generate the electrolysis product.

In this embodiment, two sides of the partition plate 31 are uniformly distributed with mastoid structures. The mastoid structure enables the electrolyte to have enhanced fluidity and to be in full contact with the first and second electrode plates 22 and 23 on both sides.

Referring to FIG. 7, FIG. 7 is a side view of the cell of FIG. 2.

The end pole structure 1 in this embodiment includes the tie bolt 11, the elastic component 12, the end splint 13 and the end polar plate 14, and the tie bolt 11 and the elastic component 12 of two end pole structures 1 can cooperate, compress tightly the end splint 13 and the end polar plate 14 of two end pole structures 1.

Referring to fig. 1 and 7, in this embodiment, the elastic member 12 is a butterfly spring set, and the tightening bolts 11 penetrate through the mounting holes 131 of the end clamping plates 13 and press the electrolysis unit 2, the isolation structure 3 and the middle pole plate 4 through the butterfly spring set and the self-thread structure, so that the components are relatively fixed to ensure the normal operation of the electrolysis cell. Of course, the end pole structure 1 may be other structures than those described above, and the electrolytic cell may be installed and fixed by other structures, which is not limited in the present invention as long as it can press each component in the electrolytic cell and make the electrolytic cell operate normally.

The end pole structure 1 further comprises a support part 15. With continued reference to fig. 1 and 7, the supporting portions 15 are disposed at both sides of the lower end of the end clamping plate 13 to integrally support the electrolytic cell at the upper end of each supporting portion 15, and since the electrolytic cell is integrally cylindrical, each supporting portion 15 can fix the electrolytic cell on the ground to prevent the electrolytic cell from rolling against the ground, and the transportation of the electrolytic cell is facilitated.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims (8)

1. An electrolytic cell characterized by: including two relative end utmost point structures (1) and compress tightly in two middle polar plate (4) and a plurality of electrolysis unit (2) between end utmost point structure (1), each is adjacent it is isolated through isolating structure (3) between electrolysis unit (2), isolating structure (3) are located including baffle (31) and cover baffle (31) circumference outside keep apart frame (32), keep apart frame (32) and be provided with electrolyte import (35) and electrolyte export (36), electrolyte import (35) with electrolyte export (36) are close to the direction at baffle (31) center all is provided with comb tooth structure (37), comb tooth (371) and space (372) thickness of comb tooth structure (37) all are between 3 millimeters to 5 millimeters.

2. The electrolytic cell of claim 1 wherein: keep apart frame (32) both sides and all be equipped with sealed waterline (33), it is adjacent through relative between isolation structure (3) sealed waterline (33) compress tightly sealed pad (34).

3. The electrolytic cell of claim 2 wherein: sealed waterline (33) is embedded structure, including a plurality of draw-in grooves (331), ridge (332) and set up in edge (333) at sealed waterline (33) both ends, the width of draw-in groove (331) is between 10 millimeters to 20 millimeters, the width of ridge (332) is between 0.6 millimeters to 1 millimeter, edge (333) with the difference in height of draw-in groove (331) bottom is between 1 millimeter to 1.5 millimeters.

4. The electrolytic cell of claim 1 wherein: the electrolytic unit (2) comprises a diaphragm (21), the diaphragm (21) comprises a high polymer textile layer, and both sides of the high polymer textile layer are covered with metal oxide layers.

5. The electrolytic cell of claim 4 wherein: the membrane (21) has a thickness in the range of 500 to 800 microns.

6. The electrolytic cell of claim 4 wherein: the electrolysis unit (2) further comprises a first polar plate (22) and a second polar plate (23) which are arranged on two sides of the diaphragm (21) respectively, the first polar plate (22) and the second polar plate (23) are made of nickel-based materials and are both in a 3D network structure.

7. The electrolytic cell of claim 1 wherein: end utmost point structure (1) includes tie bolt (11), elastic component (12), end splint (13) and end polar plate (14), two end utmost point structure (1) tie bolt (11) with elastic component (12) can cooperate, will two end utmost point structure (1) end splint (13) with end polar plate (14) compress tightly.

8. The electrolytic cell of claim 1 wherein: mastoid structures are uniformly distributed on the two sides of the partition plate (31).

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