Ion exchange membrane electrolyzer

Abstract

The utility model belongs to ion exchange membrane electrolytic cell technical field, concretely relates to a kind of ion exchange membrane electrolytic cell, including electrolytic cell body, the downside of electrolytic cell body is provided with cathode feed pipeline, the downside of electrolytic cell body and located the right side of cathode feed pipeline is provided with sacrifice electrode one.This scheme can be led to ground by the setting of sacrifice electrode one, sacrifice electrode two, and cooperate the effect of eight graphite electrodes, break the stray current gathering cycle generated by electrolytic cell, improve the export efficiency of stray current.Greatly prolong the service period of feed pipeline, also ensure the long-period operation of electrolytic cell, by setting manual pressure relief valve on pressure relief pipeline to release pressure, can be adjusted pressure relief rate at any time according to actual pressure difference, ensure cathode and anode pressure difference is always about 2.0kpa, effectively protect ion exchange membrane from large pressure difference damage, prolong the service life of ion exchange membrane, reduce production cost and consumption.

Description

Technical Field

[0001] This utility model belongs to the field of ion membrane electrolyzer technology, and specifically relates to an ion membrane electrolyzer. Background Technology

[0002] An ion-exchange membrane electrolyzer is a highly efficient and environmentally friendly electrochemical device widely used in the chlor-alkali industry (chlorine and caustic soda production), water electrolysis for hydrogen production, and CO2 electrolysis reduction. Its core feature is the use of selective ion-exchange membranes to achieve directional ion migration, thereby improving product purity and energy efficiency.

[0003] A utility model patent with patent authorization announcement number CN210736910U discloses an ion membrane electrolyzer, which includes a tank frame and multiple electrolysis unit tank groups arranged on the tank frame. The feature is that the two ends of the multiple electrolysis unit tank groups are respectively locked by copper busbar end plates. The copper busbar end plates are either copper busbar end plates fixed on a fixed base or movable copper busbar end plates fixed on a top rod base. Different numbers of electrolysis unit tank groups and copper busbar end plates for locking multiple electrolysis unit tank groups are selected according to the production capacity requirements. The copper busbar end plates are connected to the power supply.

[0004] However, existing ion membrane electrolyzers also have certain defects. First, during long-term operation and observation of existing ion membrane electrolyzers, due to the limited collection of stray current at the feed distribution pipe flange, the stray current discharge efficiency is low, which often leads to electrochemical corrosion and leakage of the unit cell plates and feed pipe flanges. This makes the equipment prone to damage and increases the frequency of maintenance. After the stray current is discharged, it circulates in the pipe and the grounding flat iron, resulting in the problem of low stray current discharge efficiency.

[0005] Secondly, existing ion-exchange membrane electrolyzers suffer from problems such as large pipeline diameters and rapid depressurization of hydrogen due to its inherent properties during depressurization. This results in large negative and positive pressures, causing the ion-exchange membrane to oscillate and potentially tear, damaging the equipment and increasing the workload for personnel. Summary of the Invention

[0006] The purpose of this invention is to provide an ion-exchange membrane electrolyzer that solves the problems of existing ion-exchange membrane electrolyzers during long-term operation and observation. These problems include limited collection of stray current at the feed distribution pipe flange, low stray current discharge efficiency, frequent electrochemical corrosion and leakage of unit cell plates and feed pipe flanges, increased equipment damage and maintenance frequency, and low stray current discharge efficiency due to circulation within the pipes and grounding flat iron after discharge. Furthermore, this invention addresses the issue that existing ion-exchange membrane electrolyzers, due to the large pipe diameter and the rapid depressurization of hydrogen gas during depressurization, generate large negative and positive pressures, causing ion membrane swaying, tearing, equipment damage, and increased labor intensity.

[0007] To achieve the above objectives, this utility model provides an ion-exchange membrane electrolyzer, comprising an electrolyzer body, a cathode feed line disposed on the lower side of the electrolyzer body, a sacrificial electrode one disposed on the lower side of the electrolyzer body and to the right of the cathode feed line, an anode feed line disposed on the upper side of the electrolyzer body, and a sacrificial electrode two disposed on the upper side of the electrolyzer body and to the right of the anode feed line. Both the sacrificial electrode one and the sacrificial electrode two are electrically connected to a graphite electrode via a grounding wire. A pressure relief line is disposed at the lower part of the electrolyzer body, and a manual pressure relief valve is disposed on the pressure relief line.

[0008] The principle of this utility model is as follows: the telescopic end is moved by the hydraulic cylinder, which in turn moves the toothed plate and causes the telescopic rod to slide along the inner wall of the fixed plate. This causes the second limiting plate to disengage from the fixed plate and moves the first limiting plate. Under the meshing relationship, the toothed plate can drive the gear to rotate, which in turn drives the support shaft to rotate, which in turn drives the rotating disk to rotate, which in turn drives the elastic plate to rotate. This causes the elastic plate to be squeezed against the limiting rod, which in turn causes the elastic plate to oscillate, and finally causes the first limiting plate to contact the fixed plate.

[0009] When the hydraulic cylinder drives the telescopic end to move back to its original position, it pulls the toothed plate to move, thereby moving the telescopic rod. This causes the second limiting plate to contact the fixed plate, and the first limiting plate to disengage from the fixed plate. Under this meshing relationship, the toothed plate drives the gear to rotate back to its original position, causing the rotating disk to rotate back to its original position. This causes the elastic plate to contact the limiting rod, ultimately resetting the elastic plate. This cycle repeats, allowing the elastic plate to agitate the electrolyte, accelerating its flow rate and improving electrolysis efficiency.

[0010] The beneficial effects of this invention are as follows: By setting sacrificial electrode one and sacrificial electrode two, and in conjunction with the function of eight graphite electrodes, the stray current generated by the electrolytic cell can be guided to the ground, breaking the stray current accumulation cycle and improving the stray current extraction efficiency. This greatly extends the service life of the feed pipeline and ensures the long-term operation of the electrolytic cell. By setting a manual pressure relief valve on the pressure relief pipeline, the pressure relief rate can be adjusted at any time according to the actual pressure difference, ensuring that the anode-cathode pressure difference is always around 2.0 kPa, effectively protecting the ion membrane from damage by large pressure differences, extending the service life of the ion membrane, and reducing production costs and consumption. The hydraulic cylinder drives the toothed plate to move back and forth. Under the meshing relationship, it can drive the gear to deflect back and forth, thereby driving the rotating disk to rotate, causing the elastic plate to move back and forth. Combined with the squeezing effect of the limit rod, the oscillation effect of the elastic plate can be improved, thereby agitating the electrolyte to increase the electrolyte flow rate and thus ensuring good electrolysis efficiency.

[0011] Furthermore, eight graphite electrodes are provided, which are evenly distributed around the electrolytic cell body. By providing graphite electrodes, stray currents can be discharged.

[0012] Furthermore, both the first and second sacrificial electrodes are in the form of a mesh cylinder, and both are made of titanium alloy. The titanium alloy material gives the first and second sacrificial electrodes good durability.

[0013] Furthermore, the electrolytic cell body is equipped with an agitation mechanism, which includes a support shaft. The support shaft is mounted on the inner wall of the electrolytic cell body via a sealed bearing. A rotating disk is fixedly sleeved on the outer side of the support shaft. The rotating disk is rotatably connected to the inner bottom of the electrolytic cell body. A limiting pad is fixedly connected to the inner bottom of the electrolytic cell body, and the limiting pad contacts the rotating disk. An elastic plate is fixedly connected to the upper end of the rotating disk. A gear is fixedly sleeved on the outer side of the support shaft. A hydraulic cylinder is provided at the lower end of the electrolytic cell body. A toothed plate is fixedly connected to the telescopic end of the hydraulic cylinder, and the toothed plate meshes with the gear. A fixed plate is fixedly connected to the lower end of the electrolytic cell body. A telescopic rod is slidably connected to the inner wall of the fixed plate, and the telescopic rod is fixedly connected to the toothed plate. Through the action of the hydraulic cylinder, toothed plate, and other structures, the rotating disk can drive the elastic plate to rotate back and forth, agitating the electrolyte and improving the subsequent electrolysis efficiency.

[0014] Furthermore, four limiting tiles are provided, and the four limiting tiles are arranged in a ring array on the electrolytic cell body. By setting the limiting tiles, the rotation of the rotating disk can be limited.

[0015] Furthermore, a limiting rod is fixedly connected to the inner bottom of the electrolytic cell body. The limiting rod contacts the elastic sheet, and the elastic sheet can be squeezed by the setting of the limiting rod.

[0016] Furthermore, a first limiting disc is fixedly sleeved on the outer side of the telescopic rod, and a second limiting disc is fixedly sleeved on the outer side of the telescopic rod. The second limiting disc is in contact with the fixed plate. Through the setting of the first limiting disc and the second limiting disc, the toothed plate can be moved and limited. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the grounding wire of the ion-exchange membrane electrolyzer according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the pipeline depressurization of the ion-exchange membrane electrolyzer according to an embodiment of the present invention;

[0019] Figure 3 This is a three-dimensional view of the overall structure of the ion-exchange membrane electrolyzer according to an embodiment of the present invention;

[0020] Figure 4 The ion-exchange membrane electrolyzer of this embodiment of the invention Figure 3 Top view;

[0021] Figure 5 The ion-exchange membrane electrolyzer of this embodiment of the invention Figure 3 A bottom view.

[0022] The following detailed description illustrates the specific implementation method:

[0023] The reference numerals in the accompanying drawings of the instruction manual include: 1. Electrolytic cell body; 2. Cathode feed line; 3. Sacrificial electrode one; 4. Anode feed line; 5. Sacrificial electrode two; 6. Graphite electrode; 7. Pressure relief line; 8. Manual pressure relief valve; 9. Agitator mechanism; 90. Support shaft; 91. Rotating disc; 92. Limiting plate; 93. Elastic sheet; 94. Limiting rod; 95. Gear; 96. Hydraulic cylinder; 97. Toothed plate; 98. Fixed plate; 99. Telescopic rod; 99. Limiting disc one; 990. Limiting disc two; 991. Detailed Implementation

[0024] The implementation examples are basically as follows Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, this embodiment provides an ion-exchange membrane electrolyzer, including an electrolyzer body 1. A cathode feed line 2 is provided on the lower side of the electrolyzer body 1. A sacrificial electrode 3 is provided on the lower side of the electrolyzer body 1 and to the right of the cathode feed line 2. An anode feed line 4 is provided on the upper side of the electrolyzer body 1. A sacrificial electrode 5 is provided on the upper side of the electrolyzer body 1 and to the right of the anode feed line 4. Both the second sacrificial electrode 5 and the first sacrificial electrode 3 are electrically connected to a graphite electrode 6 through a grounding wire. A pressure relief line 7 is provided at the lower part of the electrolyzer body 1, and a manual pressure relief valve 8 is provided on the pressure relief line 7.

[0025] like Figure 1 As shown, there are eight graphite electrodes 6, which are evenly distributed around the electrolytic cell body 1. By setting the graphite electrodes 6, stray current can be discharged. Sacrificial electrode 1 3 and sacrificial electrode 2 5 are both in the form of mesh cylinders. Both sacrificial electrode 1 3 and sacrificial electrode 2 5 are made of titanium alloy. The titanium alloy material gives sacrificial electrode 1 3 and sacrificial electrode 2 5 good durability.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, an agitation mechanism 9 is provided on the electrolytic cell body 1. The agitation mechanism 9 includes a support shaft 90. The support shaft 90 is installed on the inner wall of the electrolytic cell body 1 through a sealed bearing. A rotating disk 91 is fixedly sleeved on the outer side of the support shaft 90. The rotating disk 91 is rotatably connected to the inner bottom of the electrolytic cell body 1. A limit plate 92 is fixedly connected to the inner bottom of the electrolytic cell body 1. The limit plate 92 contacts the rotating disk 91. An elastic sheet 93 is fixedly connected to the upper end of the rotating disk 91. A gear is fixedly sleeved on the outer side of the support shaft 90. 95. A hydraulic cylinder 96 is provided at the lower end of the electrolytic cell body 1. A toothed plate 97 is fixedly connected to the telescopic end of the hydraulic cylinder 96. The toothed plate 97 meshes with the gear 95. A fixed plate 98 is fixedly connected to the lower end of the electrolytic cell body 1. A telescopic rod 99 is slidably connected to the inner wall of the fixed plate 98. The telescopic rod 99 is fixedly connected to the toothed plate 97. Through the action of the hydraulic cylinder 96, the toothed plate 97 and other structures, the rotating disk 91 can drive the elastic sheet 93 to rotate back and forth, agitating the electrolyte and improving the subsequent electrolysis efficiency.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, four limiting tiles 92 are provided, and the four limiting tiles 92 are arranged in a ring array on the electrolytic cell body 1. By setting the limiting tiles 92, the rotation of the rotating disk 91 can be limited. A limiting rod 94 is fixedly connected to the bottom inner side of the electrolytic cell body 1. The limiting rod 94 contacts the elastic sheet 93. By setting the limiting rod 94, the elastic sheet 93 can be squeezed. A limiting disk 1 990 is fixedly sleeved on the outer side of the telescopic rod 99, and a limiting disk 2 991 is fixedly sleeved on the outer side of the telescopic rod 99. The limiting disk 2 991 contacts the fixed plate 98. By setting the limiting disk 1 990 and the limiting disk 2 991, the toothed plate 97 can be moved and limited.

[0028] The specific implementation process of this utility model is as follows: The telescopic end is moved by the hydraulic cylinder 96, which drives the toothed plate 97 to move and the telescopic rod 99 to slide along the inner wall of the fixed plate 98. This causes the second limiting plate 991 to disengage from the fixed plate 98 and the first limiting plate 990 to move. Under the meshing relationship, the toothed plate 97 can drive the gear 95 to rotate, which drives the support shaft 90 to rotate, which in turn drives the rotating disk 91 to rotate, which drives the elastic plate 93 to rotate. This causes the elastic plate 93 to be squeezed against the limiting rod 94, which causes the elastic plate 93 to oscillate, and finally causes the first limiting plate 990 to contact the fixed plate 98.

[0029] When the hydraulic cylinder 96 drives the telescopic end to move back to its original position, it can pull the toothed plate 97 to move, thereby driving the telescopic rod 99 to move. This causes the second limiting plate 991 to contact the fixed plate 98, and the first limiting plate 990 to disengage from the fixed plate 98. Under the meshing relationship, the toothed plate 97 can drive the gear 95 to rotate back to its original position, thereby driving the rotating plate 91 to rotate back to its original position. This causes the elastic plate 93 to contact the limiting rod 94, and finally causes the elastic plate 93 to reset. This cycle repeats, allowing the elastic plate 93 to agitate the electrolyte, thereby accelerating the flow rate of the electrolyte and improving the electrolysis efficiency.

[0030] This scheme, through the setting of sacrificial electrode 1 (3) and sacrificial electrode 2 (5), and in conjunction with the function of eight graphite electrodes (6), can guide the stray current generated by the electrolytic cell to the ground, breaking the stray current accumulation cycle and improving the stray current extraction efficiency. This significantly extends the service life of the feed pipeline and ensures long-term operation of the electrolytic cell. By installing a manual pressure relief valve (8) on the pressure relief pipeline (7), the pressure relief rate can be adjusted at any time according to the actual pressure difference, ensuring that the anode-cathode pressure difference is always around 2.0 kPa. This effectively protects the ion exchange membrane from damage by large pressure differences, extends the membrane's service life, and reduces production costs and consumption. The hydraulic cylinder (96) drives the toothed plate (97) to move back and forth. In the meshing relationship, it drives the gear (95) to deflect back and forth, thereby driving the rotating disk (91) to rotate, causing the elastic plate (93) to move back and forth. Combined with the squeezing effect of the limiting rod (94), this enhances the oscillation effect of the elastic plate (93), thus agitating the electrolyte to increase its flow rate and ensure good electrolysis efficiency.

[0031] It should be noted in advance that, in this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An ion-exchange membrane electrolyzer, comprising an electrolyzer body, characterized in that: A cathode feed line is provided on the lower side of the electrolytic cell body. A sacrificial electrode one is provided on the lower side of the electrolytic cell body and to the right of the cathode feed line. An anode feed line is provided on the upper side of the electrolytic cell body. A sacrificial electrode two is provided on the upper side of the electrolytic cell body and to the right of the anode feed line. Both sacrificial electrode two and sacrificial electrode one are electrically connected to a graphite electrode through a grounding wire. A pressure relief line is provided at the lower part of the electrolytic cell body, and a manual pressure relief valve is provided on the pressure relief line.

2. The ion-exchange membrane electrolyzer according to claim 1, characterized in that: The graphite electrodes are provided in eight portions, which are evenly distributed around the electrolytic cell body.

3. The ion-exchange membrane electrolyzer according to claim 1, characterized in that: Both the first and second sacrificial electrodes are in the form of a mesh cylinder, and both are made of titanium alloy.

4. The ion-exchange membrane electrolyzer according to claim 1, characterized in that: The electrolytic cell body is equipped with an agitation mechanism, which includes a support shaft. The support shaft is mounted on the inner wall of the electrolytic cell body via a sealed bearing. A rotating disk is fixedly sleeved on the outer side of the support shaft. The rotating disk is rotatably connected to the inner bottom of the electrolytic cell body. A limit plate is fixedly connected to the inner bottom of the electrolytic cell body, and the limit plate contacts the rotating disk. An elastic plate is fixedly connected to the upper end of the rotating disk. A gear is fixedly sleeved on the outer side of the support shaft. A hydraulic cylinder is provided at the lower end of the electrolytic cell body. A toothed plate is fixedly connected to the telescopic end of the hydraulic cylinder, and the toothed plate meshes with the gear. A fixed plate is fixedly connected to the lower end of the electrolytic cell body. A telescopic rod is slidably connected to the inner wall of the fixed plate, and the telescopic rod is fixedly connected to the toothed plate.

5. The ion-exchange membrane electrolyzer according to claim 4, characterized in that: Four limiting tiles are provided, and the four limiting tiles are arranged in a ring array on the electrolytic cell body.

6. The ion-exchange membrane electrolyzer according to claim 4, characterized in that: A limiting rod is fixedly connected to the bottom inner side of the electrolytic cell body, and the limiting rod is in contact with the elastic sheet.

7. The ion-exchange membrane electrolyzer according to claim 4, characterized in that: A first limiting disc is fixedly sleeved on the outer side of the telescopic rod, and a second limiting disc is fixedly sleeved on the outer side of the telescopic rod. The second limiting disc is in contact with the fixing plate.

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