Efficient electrolysis system based on anode bagging

Abstract

The utility model provides a high-efficiency electrolysis system based on an anode bag. The high-efficiency electrolysis system comprises an electrolytic bath, an anode frame, a cathode frame and a diaphragm bag, the anode frame sleeves the outer side of the anode plate, and the diaphragm bag isolates the anolyte from the catholyte to form a liquid level difference. A catholyte injection device is arranged at the bottom of the cathode frame, and parallel flow injection of catholyte is achieved. By adopting the design that the anode is bagged and the cathode is not bagged, the bag sticking phenomenon is reduced, the quality and grade rate of electrodeposited nickel are improved, and the electrolysis efficiency is improved by about 40%. The anode frame and the cathode frame are integrally formed by injection molding, so that the structural strength is enhanced, and the cost is reduced. An acid mist collecting chamber is arranged at the top of the diaphragm bag and is matched with an acid mist suction device, so that acid mist is effectively treated, and the working environment is improved. And the concentration polarization is eliminated by parallel flow injection of the catholyte, and the electrolysis efficiency is improved. The device has the remarkable advantages in the aspects of improving the electrolysis efficiency, reducing the cost, improving the environment and enhancing the system stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrochemistry technical field, concretely is a kind of high-efficiency electrolytic system based on anode sleeve bag, realize the substantial promotion of electrolytic efficiency and the effective separation of electrolytic product. BACKGROUND

[0002] Electrolysis technology, as one of the core processes of electrochemical industry, is widely used in metal smelting, chemical synthesis, environmental protection and new energy development, etc. Traditional electrolytic system is usually composed of electrolytic cell, anode, cathode and corresponding electrolyte, by applying external current to promote the oxidation-reduction reaction of ions in electrolyte on the electrode surface, so as to realize the transformation of matter or the storage and release of energy. However, with the continuous growth of industrial demand and the increasing strictness of environmental protection requirements, traditional electrolytic system faces many challenges, including but not limited to low electrolytic efficiency, high energy consumption, complex electrolyte management and environmental pollution, etc.

[0003] Especially in electrolytic metallurgy, the effective isolation and efficient circulation of electrolyte between anode and cathode become the key factors restricting the electrolytic efficiency. In the traditional design of electrolytic cell, anode liquid and cathode liquid are often directly mixed or only separated by simple physical barrier, which not only leads to the mutual contamination of electrolyte components, affecting the purity and yield of electrolytic product, but also aggravates the side reactions in electrolysis process, such as the generation of acid mist, further deteriorating the working environment and increasing the environmental protection treatment cost.

[0004] In addition, anode frame and cathode frame, as important components supporting electrodes and guiding electrolyte flow, the selection of their structure and material is directly related to the stability and durability of electrolytic system. Traditional frame is mostly assembled by thermosetting material, which not only has complex manufacturing process and high cost, but also is easy to deform or even damage due to stress concentration in long-term use, affecting the electrolytic efficiency and service life.

[0005] In view of the above problems, the industry has carried out extensive exploration and improvement. For example, by introducing diaphragm technology to realize the complete isolation of anode liquid and cathode liquid, the cross contamination of electrolyte is effectively prevented; using new materials such as corrosion-resistant plastic to make electrolytic cell and frame, the corrosion resistance and service life of the system are improved; optimizing the injection and discharge mode of electrolyte, promoting the uniform distribution and efficient circulation of electrolyte, reducing dead zone and concentration gradient, so as to improve the electrolytic efficiency.

[0006] However, due to the cathode sleeve bag, the nickel deposited on the cathode is easy to stick to the bag; due to the cathode sleeve bag, the difficulty of nickel deposition is increased. At the same time, a large amount of oxygen is generated on the surface of anode, and the equivalent acid is also generated. The anode chamber is exposed to air, and acid mist is generated during the deposition process, which makes the acid mist in the plant large and the operating environment poor. These problems limit the improvement of electrolytic efficiency and the stable operation of electrolytic system. Utility model content

[0007] The utility model wants to overcome the technical problems of the prior art, and provides a high -efficient electrolysis system based on anode bag.

[0008] In order to achieve the above purpose, the utility model adopts the technical scheme as follows:

[0009] A high -efficient electrolysis system based on anode bag, it has electrolytic tank, the anode frame of being set in the outside of anode plate, and the cathode frame of being set in the outside of cathode plate, the outside of anode frame is set with diaphragm bag, the diaphragm bag is configured to isolate anode liquid and cathode liquid, and make the liquid level difference between anode liquid and cathode liquid, the bottom of cathode frame has cathode liquid injection device, the cathode liquid injection device is suitable for injecting cathode liquid from the below of cathode plate, so that the injected cathode liquid forms parallel flow relative to cathode plate.

[0010] The above technical scheme can be further improved by the following technical measures.

[0011] As an implementation manner, the anode frame is integrally injection molded, and / or the cathode frame is integrally injection molded.The anode frame has a plurality of partition ribs for supporting the diaphragm bag, and the plurality of partition ribs are arranged in a longitudinal and transverse interlaced manner.Intersections of the longitudinal and transverse partition ribs form intersection portions, and a limiting column is arranged on each intersection portion.The limiting column is configured to abut against the anode plate to limit the distance between the anode plate and the anode frame.The limiting column is threadedly connected with the intersection portion of the partition rib, so that the distance between the anode plate and the anode frame is adjustable.

[0012] As another implementation manner, an acid mist collecting chamber is formed at the top of the diaphragm bag, and the acid mist collecting chamber is configured to communicate with an acid mist suction device.The suction area of the suction port of the acid mist suction device is divided into at least a first portion and a second portion, the first portion is adapted to be immersed in the anode liquid to extract the anode liquid, and the second portion is adapted to be exposed outside the anode liquid to extract the acid mist.The area of the first portion is S1, the area of the second portion is S2, and S1:S2=1:(1-10).The diaphragm bag has an air inlet for external air to enter, and an air flow channel is formed between the air inlet and the suction port to prevent the formation of suction negative pressure in the acid mist collecting chamber.The suction pipe of the acid mist suction device sequentially passes through the diaphragm bag and the anode frame, and is arranged at the upper portion of the anode frame.

[0013] As a further embodiment, the cathode frame comprises lateral columns and a bottom beam, the bottom beam being provided with a liquid inlet member, and the liquid outlet being arranged on the liquid inlet member. The cathode liquid injection device comprises a liquid inlet pipe for obtaining cathode liquid from the outside, the liquid inlet pipe extending along the lateral columns from top to bottom to the bottom beam. The bottom beam is provided with a liquid inlet groove facing the cathode plate, and the liquid inlet member is arranged in the liquid inlet groove.

[0014] With the above technical scheme, the utility model has the following beneficial effects:

[0015] Firstly, the method of bagging the anode and not bagging the cathode can realize large flow circulation of the cathode, improve the concentration polarization problem of the cathode, help to improve the quality and grade rate of electrodeposited nickel, reduce the bag sticking phenomenon in the electrodeposition process, and the cathode does not need to replace the diaphragm bag and the diaphragm frame, which is convenient for tank operation, reduces the labor intensity, and improves the production efficiency. This design not only avoids cross contamination of the electrolyte, ensures the purity and yield of the electrolytic product, but also releases the space on the cathode side, so that the plate area of the cathode plate can be significantly increased, about 15% or so. This change directly promotes the increase of the current density in the electrolysis process, and the current intensity is increased by about 30%, thereby significantly improving the electrolysis efficiency. Comprehensive these effects, the yield of a single tank can be increased by more than 40%, which is of great significance to improve the production efficiency and reduce the cost of unit product.

[0016] Secondly, the anode frame and the cathode frame are integrally injection molded, which not only simplifies the manufacturing process and reduces the cost, but also significantly improves the structural strength of the frame. The traditional frame is assembled by splicing the thermosetting material, which is not only complicated to manufacture and high in cost, but also easy to deform or even damage due to stress concentration during long-term use. The integrally injection molded frame effectively avoids these problems, ensures the stability and durability of the electrolysis system, and prolongs the service life of the equipment.

[0017] Furthermore, the acid mist collecting chamber arranged at the top of the diaphragm bag cooperates with the acid mist suction device to form a high-efficiency acid mist treatment system. In the electrolysis process, a large amount of oxygen and acid will be generated on the surface of the anode. If these acid mists are directly discharged into the air, not only the environment will be polluted, but also the operating environment will be deteriorated, and the health of the workers will be affected. The acid mist collecting chamber of the utility model can effectively capture these acid mists, and the acid mist suction device can safely process them, thereby completely solving the problem of acid mist generated by the anode chamber exposed to the air, improving the working environment, and reducing the environmental protection treatment cost.

[0018] Finally, the cathode liquid injection device arranged at the bottom of the cathode frame realizes parallel flow injection of the cathode liquid. This design enables the cathode liquid to uniformly and stably cover the surface of the cathode plate, eliminates concentration polarization phenomenon, and improves electrolysis efficiency. At the same time, parallel flow injection is also helpful for uniform distribution and efficient circulation of the electrolyte, reduces dead zones and concentration gradient, and further improves the overall performance of the electrolysis system.

[0019] In summary, the high-efficiency electrolysis system based on the anode sleeve bag has significant technical advantages in improving electrolysis efficiency, reducing production cost, improving working environment, and improving system stability and durability. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but not limit the present application.

[0021] Figure 1 is a structural schematic diagram of the electrolytic cell in embodiment one.

[0022] Figure 2 is a length direction cross-sectional view of the electrolytic cell in embodiment one.

[0023] Figure 3 is a width direction cross-sectional view of the electrolytic cell in embodiment one.

[0024] Figure 4 is a top view of the electrolytic cell in embodiment one.

[0025] Figure 5 is a structural schematic diagram of the anode assembly in embodiment one.

[0026] Figure 6 is an exploded view of the anode assembly in embodiment one.

[0027] Figure 7 is a structural schematic diagram of the anode frame in embodiment one.

[0028] Figure 8 is a structural schematic diagram of the cathode assembly in embodiment one.

[0029] Figure 9 is an exploded view of the cathode assembly in embodiment one.

[0030] Figure 10 is a structural schematic diagram of the cathode frame in embodiment one.

[0031] REFERENCE SIGNS:

[0032] 1. electrolytic cell; 2. anode assembly; 201. anode frame; 201a. spacer rib; 202. diaphragm bag; 203. anode plate; 204. anode conductive beam; 205. acid mist suction device; 3. cathode assembly; 301. cathode frame; 302. cathode plate; 303. cathode liquid injection device; 303a. liquid inlet pipe; 303b. liquid inlet member. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the present application will be further described in detail below with reference to the drawings. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0034] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] Unless otherwise defined, the technical terms or scientific terms used in the present patent document should be understood as the common meanings understood by those skilled in the art to which the present application belongs. The "first", "second" and similar words used in the patent specification and claims of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. Similarly, "one", "an" or "the" and similar words do not represent a quantity limitation, but represent the existence of at least one. "Including" or "containing" and similar words mean that the elements or objects appearing before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, and do not exclude other elements or objects. "Center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are only used to represent relative positional relationships, which may change accordingly when the absolute position of the described object changes, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0036] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For the ordinary skill in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0037] Some embodiments of the utility model are described in detail below in conjunction with the drawings.In the case of no conflict, the features in the following examples can be combined with each other.

[0038] Example one:

[0039] As Figures 1 to 4 shown, the embodiment provides a kind of high-efficiency electrolysis system based on anode sleeve bag, which mainly includes electrolytic tank 1, anode assembly 2 and cathode assembly 3.Electrolytic tank 1 as the main container of electrolysis process, for containing anode liquid and cathode liquid, and provide the physical space required for electrolysis.Anode assembly 2 and cathode assembly 3 are respectively arranged at the two sides of electrolytic tank 1, and the ion in electrolyte is caused to occur oxidation-reduction reaction on electrode surface by applying external current.

[0040] The structure of anode assembly 2 is as shown in Figures 5 to 7 , mainly includes anode frame 201, diaphragm bag 202, anode plate 203 and anode conductive beam 204.Anode frame 201 is sleeved on the outside of anode plate 203, and plays the role of supporting and positioning anode plate.Diaphragm bag 202 is sleeved on the outside of anode frame 201, for isolating anode liquid and cathode liquid, to prevent cross contamination between the two.Anode conductive beam 204 is used to hang anode assembly 2 in electrolytic tank 1, to ensure its stable position in the electrolysis process.Anode plate 203 is electrically connected to anode conductive plate on electrolytic tank 1 through anode conductive beam 204.Both ends of anode frame 201 extend a supporting ear, and anode frame 201 is positioned on electrolytic tank 1 through supporting ear.The position for positioning anode frame 201 on electrolytic tank 1 is lower than the position for positioning anode plate 203.

[0041] Anode frame 201 includes front frame body, rear frame body and spacing structure spacing front and rear frame bodies in front-rear direction.Anode frame has replicable one-piece injection molding features, which are configured to form an integral structure with the spacing structure and the front and rear frame bodies by the injection molding process.This one-piece injection molding technology not only simplifies the production process, shortens the production cycle and reduces the production cost, but also improves the structural strength and corrosion resistance of the anode frame, and greatly reduces the mass and production cost of the anode frame.

[0042] The spacing structure is arranged at the edges of the front and rear frame bodies and defines a polar plate receiving cavity between the front and rear frame bodies for accommodating the polar plate. The polar plate receiving cavity is designed to enable the polar plate to be accommodated in the anode frame 201 and maintain a distance from the diaphragm bag 202, preventing adhesion between the anode plate 203 and the diaphragm bag 202.

[0043] Further, the inner side of the front frame body has a plurality of front spacing ribs 201a integrally formed thereon and interconnected with each other. These front spacing ribs not only enhance the structural strength of the front frame body, but also form front liquid inlet channels for the electrolyte to enter the polar plate receiving cavity. Similarly, the inner side of the rear frame body has a plurality of rear spacing ribs integrally formed thereon and interconnected with each other, and these rear spacing ribs form rear liquid inlet channels for the electrolyte to enter the polar plate receiving cavity. The use of an integrally injection-molded anode frame eliminates the need to embed reinforcing components such as steel bars in the front and rear spacing ribs, thereby reducing the size of the spacing ribs and the proportion of the area occupied by the spacing ribs in the front and rear liquid inlet surfaces of the anode frame, reducing the impact on the cathode power lines and current distribution, improving the uniformity of the cathode current distribution, and ensuring the quality of the cathode product.

[0044] In addition, the two front spacing ribs intersecting with each other form a front intersection portion at their intersection, and a front limiting post (not shown in the figure) is arranged on the front intersection portion. The front limiting post is arranged to abut against the anode plate 203 to maintain the distance between the anode plate and the front spacing rib. Similarly, the two rear spacing ribs intersecting with each other form a rear intersection portion at their intersection, and a rear limiting post is arranged on the rear intersection portion. The rear limiting post is adapted to abut against the polar plate to maintain the distance between the polar plate and the rear spacing rib. The design of the front and rear limiting posts ensures the stability of the polar plate during electrolysis, prevents the anode frame spacing rib 201a from deforming inward due to the liquid level difference between the anode and cathode, and avoids scratching the plating layer of the anode.

[0045] In the present embodiment, the front and rear limiting posts can be arranged to extend to the length of the anode plate 203 receiving cavity, which can be adjusted by the user, and the limiting post and the intersection portion are connected by threads. Such a design increases the applicability and flexibility of the anode frame 201, and the distance between the anode plate 202 and the spacing rib 201a can be adjusted according to actual needs to meet the needs of different electrolysis systems.

[0046] At the top of the polar plate receiving cavity, a polar plate inlet is formed for placing the anode plate 202. Such a design facilitates the installation and replacement of the anode plate, improving the maintenance efficiency of the electrolysis system. At the same time, lateral through holes are formed on the left and right sides of the polar plate receiving cavity for the flow of electrolyte, and a bottom through hole is formed at the bottom for the flow of electrolyte. Such a design further ensures the uniform distribution and effective update of the electrolyte, thereby improving the mass transfer efficiency during electrolysis and avoiding the problem of concentration polarization.

[0047] In summary, the anode frame of the present embodiment achieves the goals of replicability, light weight, short production cycle, and low cost by adopting the one-piece injection molding technology and optimizing the structural design. At the same time, by setting the front and rear partitioning ribs, front and rear limiting columns, and other structures, the flow path of the electrolyte is effectively improved, the electrolysis efficiency is improved, and the stability of the anode plate 202 during the electrolysis process is ensured. In addition, the anode frame 201 also has the advantages of simple structure, easy manufacturing and maintenance, and is expected to become a new generation of mainstream product in the electrolysis industry.

[0048] Since the anode frame 201 is made of one-piece injection molding technology, it has the advantages of simple structure, easy manufacturing, and low cost. At the same time, one-piece injection molding also improves the structural strength of the anode frame 201, making it less likely to deform or damage during long-term use. The anode frame 201 is provided with a plurality of partitioning ribs 201a, which are arranged in a crisscross manner, not only enhancing the overall strength of the anode frame 201, but also providing good support for the diaphragm bag 202.

[0049] The diaphragm bag 202 is made of a material that is corrosion-resistant, high-temperature-resistant, and has good elasticity, and can be made of the diaphragm cloth disclosed in Chinese Patent No. CN102433636B, entitled "Machine-woven diaphragm cloth for electrolytic nickel and its weaving method". The top of the diaphragm bag 202 forms an acid mist collection chamber (not separately marked in the figure), which is located above the liquid level of the anode liquid. The acid mist collection chamber is in communication with the acid mist suction device 205. During the electrolysis process, a large amount of oxygen and acid mist will be generated on the anode surface, which will be extracted and treated by the acid mist suction device 205 through the acid mist collection chamber, thereby avoiding pollution of the environment and harm to the operators.

[0050] The suction port of the acid mist suction device 205 is divided into two parts: the first part is immersed in the anode liquid to extract impurities and bubbles in the anode liquid; the second part is exposed outside the anode liquid and is used to extract acid mist. By reasonably designing the area ratio of the suction port (such as S1:S2=1:(1-10)), it can be ensured that the acid mist can be effectively extracted, and the flow of the electrolyte and the stability of the electrolysis process will not be affected due to excessive suction force. In addition, the diaphragm bag 202 is also provided with an air inlet (not shown in the figure), which is used for the external air to enter the acid mist collection chamber, forming an air flow channel between the suction port, and preventing the formation of suction negative pressure in the acid mist collection chamber.

[0051] The area of the first portion 511 is S1, the area of the second portion 512 is S2, and S1:S2 = 1:(1-10) is satisfied; if the area of the first portion 511 is too large, it will cause too much anode liquid to be sucked, thereby blocking the suction pipe and affecting the effective suction of the acid mist by the suction port. Within this ratio range, it can be ensured that the anode liquid and the acid mist can be fully extracted, and the recovery efficiency remains at a high level. In order to further improve the recovery efficiency of the anode liquid and the acid mist, it is recommended that the area ratio of the first portion 511 to the second portion 512 be adjusted to S1:S2 = 1:2.

[0052] In the present embodiment, the inner diameter of the suction port is designed to be between 10 mm and 30 mm. If the inner diameter of the suction port is too large, it may adversely affect the size design of the anode plate and / or the diaphragm bag; and if the inner diameter is too small, it may not be able to effectively suck the anode liquid and the acid mist in time. In addition, too small inner diameter of the suction port will also affect the area distribution of the first portion and the second portion, which may cause the anode liquid to block the suction pipe, thereby affecting the suction effect of the acid mist. Therefore, the inner diameter of the suction port is preferably 15 mm to 25 mm. Specifically, the inner diameter of the suction pipe is designed to be 20 mm, and the outer diameter is 25 mm. Such a design can ensure that the anode liquid and the acid mist flow smoothly during the suction process, while effectively avoiding problems such as blockage and leakage. Of course, in actual application, the inner diameter of the suction port should be flexibly selected according to specific needs and conditions.

[0053] The structure of the cathode assembly 3 is shown in Figures 8 to 10 The cathode assembly 3 is mainly composed of a cathode frame 301, a cathode plate 302, and a cathode liquid injection device 303. The cathode frame 301 is sleeved on the outside of the cathode plate 302, and serves to support and fix the cathode plate. The cathode liquid injection device 303 is arranged at the bottom of the cathode frame 301, and is used to uniformly inject cathode liquid to the lower side of the cathode plate 302.

[0054] The cathode frame 301 is also made of one-piece injection molding technology, which has the advantages of simple structure, easy manufacturing, and low cost. The cathode frame 301 includes a lateral column and a bottom beam, and the bottom beam is provided with a liquid inlet member 303b (not separately marked in the figure), and the liquid inlet member 303b is provided with a liquid outlet (not shown in the figure), which is used to realize uniform liquid inlet of each cathode plate.

[0055] The cathode liquid injection device 303 includes two parts, a liquid inlet pipe 303a and a liquid inlet member 303b. The liquid inlet pipe 303a is connected to the source of cathode liquid from the outside world and extends along the lateral column of the cathode frame 301 from top to bottom to the bottom beam. The liquid inlet member 303b is arranged on the bottom beam and has a liquid inlet groove (not shown in the figure) facing the cathode plate 302 for uniformly distributing the cathode liquid in the liquid inlet pipe 303a to the bottom of the cathode plate 302. Through this design, the cathode liquid can cover the surface of the cathode plate 302 in a parallel flow manner, eliminating the concentration polarization phenomenon and improving the electrolysis efficiency.

[0056] The cathode frame 301 mainly includes a frame body and a cathode chamber formed inside the frame body. The cathode chamber is used to accommodate the cathode plate 302 and is the main area where the electrolysis reaction occurs. The frame body serves to support and fix the cathode plate 302 and guide the flow of cathode liquid. The frame body specifically includes lateral columns and a bottom beam, and also has crosswise and transverse partition ribs between them. The lateral column is vertically arranged to support the structure of the entire cathode frame 301. The bottom beam is horizontally arranged and connected to the lower end of the lateral column to form a stable frame structure. The cathode chamber is located inside this frame structure and is defined by the space surrounded by the lateral column and the bottom beam.

[0057] The core innovation of the cathode frame 301 lies in the cathode liquid injection device 303 thereon. This device is used to uniformly and efficiently inject the cathode liquid obtained from the outside world into the cathode chamber, to ensure that there is enough cathode liquid around the cathode plate 302 for electrolysis reaction and effectively eliminate the concentration polarization phenomenon.

[0058] The cathode liquid injection device mainly includes a liquid inlet pipe 303a and a liquid inlet member 303b. One end of the liquid inlet pipe 303a is connected to the cathode liquid supply device from the outside world, and the other end extends along the lateral column from top to bottom to the bottom beam and is fixed on the lateral column. This design ensures stable supply of cathode liquid and makes the cathode frame 301 easily connectable to the cathode liquid supply system from the outside world, improving the flexibility and operability of the entire electrolysis system.

[0059] The liquid inlet member 303b is arranged on the bottom beam and below the cathode chamber. The liquid inlet member 303b is provided with a liquid outlet, and the cathode liquid enters the liquid inlet member 303b from the liquid inlet pipe 303a and is injected into the cathode chamber through the liquid outlet. Since the liquid outlet is located below the cathode plate 302, the cathode liquid can be injected into the cathode chamber from below the cathode plate 302. This bottom injection method ensures that the cathode liquid is uniformly distributed around the cathode plate 302, effectively eliminating the concentration polarization phenomenon near the cathode plate 302.

[0060] The specific design of the liquid inlet member 303b is also an important innovation of the present embodiment. The liquid inlet member 303b can be configured as a square tube extending along the bottom beam at the bottom of the cathode chamber. The liquid outlets can be configured on both sides of the liquid inlet member 303b, i.e. both the front and back sides of the liquid inlet member 303b have a narrow gap serving as the liquid outlet. In the present embodiment, the liquid outlets are preferably configured at the top of the liquid inlet member 303b, so that the cathode liquid can flow into the cathode chamber from above and fully contact the cathode plate 302.

[0061] Further, in order to optimize the distribution of the cathode liquid and improve the electrolysis efficiency, the shape and distribution of the liquid outlets can also be adjusted as needed. For example, in the present embodiment, the liquid outlets are preferably configured as elongated slits extending in the length direction of the liquid inlet member 303b. This design allows the cathode liquid to be more evenly distributed across the entire bottom area of the cathode chamber, further improving the uniformity and efficiency of the electrolysis reaction.

[0062] In addition, the bottom beam can also have a liquid inlet groove facing the cathode chamber. The liquid inlet member 303b is then arranged in the liquid inlet groove to allow the cathode liquid to be injected more smoothly into the cathode chamber. The design of the liquid inlet groove can also guide the cathode liquid to flow more smoothly into the cathode chamber, while also helping to reduce waste and leakage of the cathode liquid.

[0063] In order to further optimize the flow path of the cathode liquid and improve the efficiency of electrolysis, a pair of spaced apart flow guide walls can also be arranged in the liquid inlet groove. The arrangement of the flow guide walls can guide the cathode liquid to flow along a predetermined path, avoiding the cathode liquid flowing randomly in the cathode chamber, thereby further improving the stability and efficiency of the electrolysis reaction.

[0064] In summary, the cathode frame 301 provided by the present embodiment realizes efficient and uniform injection of electrolyte by optimizing the injection method of cathode liquid, effectively eliminates the concentration polarization phenomenon, and improves the uniformity and efficiency of the electrolysis reaction. At the same time, the cathode frame 301 also has the advantages of simple structure, easy installation and maintenance, etc., and is suitable for metal electrolytic refining processes in various electrochemical industries.

[0065] In the electrolysis process, the cathode liquid is injected into the electrolysis tank 1, the generated anode liquid is extracted from the electrolysis tank 1 by the suction device, and is effectively isolated by the diaphragm bag 202 to form a liquid level difference. The external current is applied to the anode plate 203 through the anode conducting beam 204, while the cathode plate 302 is connected to the negative electrode of the power supply through the conducting part of the electrolysis tank 1. Under the action of the current, the ions in the anode liquid undergo oxidation reaction on the surface of the anode plate 203 to produce oxygen and corresponding acid; while the ions in the cathode liquid undergo reduction reaction on the surface of the cathode plate 302 to produce the desired electrolysis product.

[0066] The method of anode bagging and cathode non-bagging can reduce the bag sticking phenomenon in the electrodeposition process, and help to improve the quality and grade rate of electrodeposited nickel and cobalt, and the cathode does not need to replace the diaphragm bag and diaphragm frame, which is convenient for tank operation, reduces the labor intensity, and improves the production efficiency. This design not only avoids the cross contamination of electrolyte, ensures the purity and yield of electrolytic product, but also releases the space on the cathode side, so that the plate surface area of the cathode plate can be increased by about 15%. This change directly promotes the increase of current density in the electrolysis process, and the current intensity is increased by about 30%, thereby significantly improving the electrolysis efficiency. Comprehensive these effects, the yield of a single tank can be increased by more than 40%, which is of great significance to improve the production efficiency and reduce the cost of unit product. At the same time, the integrated injection molding structure of the anode frame 201 and the cathode frame 301 ensures the stability and durability of the electrolysis system, and reduces the manufacturing and maintenance costs.

[0067] The acid mist generated in the electrolysis process is extracted and treated by the acid mist suction device 205 through the acid mist collection chamber at the top of the diaphragm bag 202. The suction port of the acid mist suction device 205 is divided into two parts, which are used to extract the anode liquid and the acid mist exposed outside the anode liquid respectively. By reasonably designing the area ratio and air flow channel of the suction port, the effective extraction and treatment of acid mist can be ensured, and the harm to the environment and operating personnel can be avoided.

[0068] The cathode liquid injection device 303 injects the cathode liquid into the lower side of the cathode plate 302 in a parallel flow manner, so that the cathode liquid can uniformly and stably cover the surface of the cathode plate. This parallel flow injection method eliminates the concentration polarization phenomenon and improves the electrolysis efficiency.

[0069] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A high efficiency electrolysis system based on anode bagging, characterized in that, Possessing: an electrolytic cell, an anode frame sleeved outside the anode plate, and a cathode frame sleeved outside the cathode plate; a diaphragm bag is sleeved outside the anode frame, the diaphragm bag is configured to isolate the anolyte and the catholyte, and a liquid level difference is formed between the anolyte and the catholyte; the bottom of the cathode frame has a catholyte injection device, the catholyte injection device is suitable for injecting the catholyte from below the cathode plate, so that the injected catholyte forms a parallel flow relative to the cathode plate.

2. The high efficiency electrolysis system of claim 1, wherein, The anode frame is integrally injection molded, and / or the cathode frame is integrally injection molded.

3. The high efficiency electrolysis system of claim 2, wherein, The anode frame has a plurality of diaphragm ribs for supporting the diaphragm bag, and the plurality of diaphragm ribs are arranged in a longitudinal and transverse manner.

4. The high efficiency electrolysis system of claim 3, wherein, An intersection is formed at the intersection of the longitudinal and transverse diaphragm ribs, and a limiting column is arranged on the intersection, which is configured to abut against the anode plate to limit the distance from the anode frame.

5. The high efficiency electrolysis system of claim 4, wherein, The limiting column is threadedly connected with the diaphragm rib intersection, so that the distance between the anode plate and the anode frame is adjustable.

6. The high efficiency electrolysis system of any of claims 1-5, wherein, The top of the diaphragm bag forms an acid mist collecting chamber, which is configured to communicate with an acid mist suction device.

7. The high efficiency electrolysis system of claim 6, wherein, The suction area of the suction port of the acid mist suction device is divided into at least a first part and a second part, the first part is suitable for being immersed in the anolyte to extract the anolyte, and the second part is suitable for being exposed outside the anolyte to extract the acid mist.

8. The high efficiency electrolysis system of claim 7, wherein, The area of the first part is S1, the area of the second part is S2, and S1:S2=1:(1-10) is satisfied.

9. The high efficiency electrolysis system of claim 7 or 8, wherein, The diaphragm bag has an air inlet for external air to enter, and an air flow channel is formed between the air inlet and the suction port to prevent the formation of suction negative pressure in the acid mist collecting chamber.

10. The high efficiency electrolysis system of claim 7 or 8, wherein, The suction pipe of the acid mist suction device passes through the diaphragm bag and the anode frame in sequence and is arranged at the upper part of the anode frame.

11. The high efficiency electrolysis system of claim 1, wherein, The cathode frame includes a lateral column and a bottom beam, the bottom beam has a liquid inlet member, and the liquid inlet member is provided with a liquid outlet.

12. The high efficiency electrolysis system of claim 11, wherein, The catholyte injection device includes a liquid inlet pipe connected to the external catholyte, and the liquid inlet pipe extends from top to bottom along the lateral column to the bottom beam.

13. The high efficiency electrolysis system of claim 11, wherein, The bottom beam has a liquid inlet groove facing the cathode plate, and the liquid inlet member is arranged in the liquid inlet groove.

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