Acid mist recovery system for electrolytic bath
By installing diaphragm bags and suction devices on the anode plates of the electrolytic cell, the simultaneous recovery of acid mist and anolyte is achieved, solving the problem of improper acid mist treatment in traditional electrolytic cells, improving recovery efficiency and reducing energy consumption and costs.
Patent Information
- Application Number
- CN202423171842.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-20
AI Technical Summary
The acid mist generated during the anode reaction in traditional electrolyzers is not properly treated, leading to environmental pollution and personal injury. Existing technologies are unable to effectively recycle and treat it.
An acid mist recovery system for an electrolytic cell was designed, including a diaphragm bag fitted on the anode plate and a suction device. The suction port is divided into two parts, which are used to extract the anolyte and acid mist respectively, so as to achieve simultaneous recovery.
It improves the recovery efficiency of acid mist and anolyte, reduces energy consumption and costs, and at the same time avoids the overflow of acid mist, protecting the environment and personnel safety.
Smart Images
Figure CN223548124U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of metal electrolytic refining technology in the electrochemical industry, and in particular to an acid mist recovery system for electrolytic cells. Background Technology
[0002] Traditional electrolysis technology involves placing the anode and cathode in a tank where the electrolyte flows slowly. Under the influence of an electric field, anions move directionally towards the anode and cations move directionally towards the cathode. By controlling certain technical conditions, the target metal cations are electrolytically deposited at the cathode, thereby obtaining high-purity electrolytic products.
[0003] Taking nickel sulfate electrowinning as an example:
[0004] The nickel sulfate electrowinning process uses NiSO4 as the electrolyte, and the following electrode reactions occur under the action of direct current:
[0005] Cathode reaction: Ni 2+ +2e=Ni,2H + +2e = H2;
[0006] The anode uses a quaternary alloy or titanium plated with lead dioxide as the anode plate. Because a passivation film forms on its surface, preventing the ionization of the anode metal, the main reaction at the anode is:
[0007] 2H₂O-4e=O₂+4H + .
[0008] That is, nickel is electrolytically deposited at the cathode, and a side reaction occurs, releasing a small amount of hydrogen gas; acid is produced at the anode (H+ combines with sulfate ions), and oxygen is released at the same time.
[0009] During nickel sulfate electrowinning, the anodic reaction generates hydrogen ions that combine with sulfate ions to form sulfuric acid, which remains in the anolyte. At the same time, the anodic reaction produces oxygen. When the oxygen bubbles break on the surface of the anolyte, they carry the anolyte and the sulfuric acid out, producing acid mist.
[0010] During the operation of the electrolytic cell, a diaphragm bag is installed on the outside of the anode plate, and a cavity is formed inside the diaphragm bag to contain the anolyte and acid mist. If the acid mist is not properly treated, it will overflow, which will not only pollute the environment, but also cause harm to people's health.
[0011] Therefore, it is necessary to propose a new technical solution to overcome the shortcomings of existing technologies. Utility Model Content
[0012] To address the aforementioned issues, this application provides an acid mist recovery system for electrolytic cells, capable of recovering the anolyte and acid mist generated during electrowinning.
[0013] This application provides an acid mist recovery system for an electrolytic cell, including a diaphragm bag fitted onto an anode plate, wherein a receiving cavity for containing anolyte and acid mist is formed inside the diaphragm bag;
[0014] Also includes:
[0015] A suction tube with a suction port, the suction tube communicating with a receiving cavity; and
[0016] A suction device, wherein the suction device is connected to a suction tube;
[0017] The suction area of the suction port is divided into at least a first part and a second part. The first part is adapted to be immersed in the anolyte to extract the anolyte, and the second part is adapted to be exposed outside the anolyte to extract acid mist.
[0018] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.
[0019] Optionally, the area of the first part is S1, and the area of the second part is S2, and the condition S1:S2 = 1:(0.5-20) is met.
[0020] Optionally, the area of the first part is S1, and the area of the second part is S2, and the condition S1:S2 = 1:(1-15) is satisfied.
[0021] Optionally, the inner diameter of the suction port is 10mm to 30mm.
[0022] Optionally, the inner diameter of the suction port is 15mm to 25mm.
[0023] Optionally, the suction tube passes through the diaphragm bag and is attached to the anode diaphragm frame.
[0024] Optionally, the anode diaphragm frame has a mounting portion for mounting the suction tube.
[0025] Optionally, the diaphragm bag is sealed.
[0026] Optionally, the diaphragm bag has a balance port;
[0027] The balance port and the suction port are located on opposite sides of the diaphragm bag.
[0028] Optionally, the suction port is located on the top side of the diaphragm bag.
[0029] This application discloses an acid mist recovery system for an electrolytic cell. The suction device uses a suction pipe to suction the anolyte and acid mist in the containment chamber, thereby achieving the simultaneous recovery of the anolyte and acid mist and improving the recovery efficiency.
[0030] Importantly, the suction port of the suction tube is divided into a first part and a second part. This design simplifies the structure of the system, makes it easy to operate, and reduces energy consumption and costs. Attached Figure Description
[0031] Figure 1 A schematic diagram of an electrolytic cell and an acid mist recovery system provided in this application;
[0032] Figure 2 for Figure 1 A schematic diagram of a local structure in the image;
[0033] Figure 3 for Figure 1 Sectional view in;
[0034] Figure 4 for Figure 3 A magnified structural diagram of part A in the diagram;
[0035] Figure 5 This is a schematic diagram of the electrolytic cell and acid mist recovery system in this application;
[0036] Figure 6 for Figure 1 A schematic diagram of the structure of the anode plate, diaphragm bag, and suction tube;
[0037] Figure 7 for Figure 6 The sectional view in the image.
[0038] The annotations in the figure are explained as follows:
[0039] 10. Electrolytic cell; 11. Reservoir; 12. Cathode liquid level; 13. Anode liquid level;
[0040] 20. Anode plate;
[0041] 30. Diaphragm bag; 31. Receiving cavity; 32. Anode diaphragm frame;
[0042] 40. Overflow device; 41. Overflow port;
[0043] 50. Suction tube; 51. Suction port; 511. First part; 512. Second part; 52. First mounting joint; 53. Second mounting joint; 54. Third mounting joint; 55. First pipe section; 56. Second pipe section;
[0044] 60. Manifold;
[0045] 70. Suction device. Detailed Implementation
[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0047] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.
[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0049] like Figures 1 to 7 As shown, this application provides an acid mist recovery system for an electrolytic cell 10, including a diaphragm bag 30 sleeved on an anode plate 20, with a receiving cavity 31 formed inside the diaphragm bag 30 for containing anolyte and acid mist; the acid mist recovery system also includes a suction pipe 50 with a suction port 51 and a suction device 70, the suction pipe 50 communicating with the receiving cavity 31; the suction device 70 communicating with the suction pipe 50; wherein, the suction area of the suction port 51 is divided into at least a first part 511 and a second part 512, the first part 511 being adapted to be immersed in the anolyte to extract the anolyte, and the second part 512 being adapted to be exposed outside the anolyte to extract acid mist.
[0050] The suction device 70 uses the suction pipe 50 to suction the anolyte and acid mist from the receiving cavity 31, achieving simultaneous recovery of the anolyte and acid mist, thereby improving recovery efficiency. Importantly, the suction port 51 of the suction pipe 50 is divided into a first part 511 and a second part 512. This design simplifies the system structure, makes it easy to operate, and reduces energy consumption and cost. By suctioning the anolyte from the receiving cavity 31, a level difference is created between the catholyte inside and outside the diaphragm bag 30. This ensures that the catholyte outside the diaphragm bag 30 penetrates into it, and the catholyte level is higher than the anolyte level. Under this level difference, the anolyte in the diaphragm bag 30 does not flow back into the catholyte in the electrolytic cell 10, while the catholyte in the electrolytic cell 10 flows into the diaphragm bag 30 and mixes with the anolyte.
[0051] In this embodiment, as Figures 1 to 7 As shown, the structure of the electrolytic cell 10 is not strictly limited, as long as it forms a receiving tank 11 to accommodate the anode plate 20, the diaphragm bag 30, and the catholyte, etc., for electrowinning. For example, the electrolytic cell 10 is generally rectangular in shape. The height of the catholyte in the electrolytic cell 10 is higher than the height of the anolyte in the diaphragm bag 30, so as to ensure that the anolyte can penetrate from the diaphragm bag 30 into the diaphragm bag 30.
[0052] In this embodiment, as Figures 1 to 2 As shown, the electrolytic cell 10 has an overflow device 40 that limits the catholy liquid level. The overflow device 40 is connected to a receiving tank 11. When the catholy liquid level in the receiving tank 11 exceeds a set value, the excess catholy liquid will flow out through the overflow device 40. The overflow device 40 is used to limit the catholy liquid level, control the flow direction of the electrolyte, improve current efficiency, and increase the yield of electrolytic metal. The overflow device 40 is located on one side of the electrolytic cell 10 and has an overflow port 41 connected to the receiving tank 11; excess catholy liquid can flow out through the overflow port 41.
[0053] In this embodiment, as Figures 1 to 3 As shown, there are multiple anode plates 20, and each anode plate 20 is fitted with a diaphragm bag 30 on its outer side. The number of suction pipes 50 corresponds to the number of anode plates 20. Each suction pipe 50 can respectively draw the anolyte and acid mist from the corresponding diaphragm bag 30 and collect them into the manifold 60. The suction device 70 can be a fan connected to the return pipe.
[0054] In this embodiment, as Figures 3 to 7As shown, the diaphragm bag 30 has an anode diaphragm frame 32 inside; the top of the diaphragm bag 30 is provided with an opening for the anode plate 20 to be removed or inserted. The top of the diaphragm bag 30 forms a cavity; the acid mist generated inside the diaphragm bag 30 can only accumulate in the cavity due to the resistance of the diaphragm bag 30. The suction port 51 is located on one side of the top of the diaphragm bag 30, so as to facilitate the suction port 51 to draw out the acid mist and the upper anolyte inside the diaphragm bag 30. The diaphragm bag 30 is sealed to prevent acid mist from overflowing. The suction device 70 can draw out all the anolyte and acid mist inside the diaphragm bag 30 through the suction pipe 50. Of course, in other embodiments, the diaphragm bag 30 has a balance port. By setting the balance port, the pressure difference inside and outside the diaphragm bag 302 can be balanced, avoiding problems such as rupture or leakage of the diaphragm bag 30 due to excessive pressure. The balance port and suction port 51 are located on opposite sides of the diaphragm bag 30; when the anolyte and acid mist are extracted, the pressure inside the diaphragm bag 30 gradually decreases. At this time, external air or liquid can enter the diaphragm bag 30 through the balance port, thereby maintaining the pressure balance inside and outside the diaphragm bag 30. This can avoid problems such as rupture or leakage of the diaphragm bag 30 due to excessive pressure.
[0055] In this embodiment, as Figures 3 to 7 As shown, the suction tube 50 passes through the diaphragm bag 30 and is attached to the anode diaphragm frame 32, enabling the anode diaphragm frame 32 to provide support for the suction tube 50. The anode diaphragm frame 32 has a mounting portion for mounting the suction tube 50. The mounting portion can be a mounting hole into which one end of the suction tube 50 is inserted to facilitate the assembly and disassembly of the suction tube 50 from the anode diaphragm frame 32. The mounting hole is a through hole; one end of the suction tube 50 is inserted into the through hole.
[0056] In this embodiment, as Figures 3 to 7 As shown, the suction pipe 50 may include one or more pipe segments; when the suction pipe 50 includes multiple pipe segments, adjacent pipe segments are connected by a connector. Specifically, the suction pipe 50 includes a first mounting connector 52, a second mounting connector 53, a third mounting connector 54, a first pipe segment 55, and a second pipe segment 56; the first mounting connector 52 is inserted into a mounting hole; the side wall of the electrolytic cell 10 has a through hole or threaded hole pre-embedded part; the second mounting connector 53 is located inside the electrolytic cell 10 and is inserted into the through hole; the third mounting connector 54 is located outside the electrolytic cell 10 and is inserted into the through hole; one end of the first pipe segment 55 is connected to the first mounting connector 52, and the other end is connected to the second mounting connector 53; one end of the second pipe segment 56 is connected to the third mounting connector 54, and the other end is connected to the manifold 60. The through hole is a threaded hole to facilitate the sealing and fixing of the second mounting connector 53 and the third mounting connector 54 with the through hole.
[0057] In this embodiment, as Figures 3 to 7As shown, the area of the first part 511 is S1, and the area of the second part 512 is S2, satisfying S1:S2 = 1:(0.5-20). If the area of the first part 511 is too large, too much anolyte will be drawn in, causing blockage of the suction pipe 50 and affecting the suction of acid mist at the suction port 51. Under this ratio, it can be ensured that both anolyte and acid mist can be fully extracted, and the recovery efficiency is high. To further optimize the recovery effect of anolyte and acid mist, the area of the first part 511 is S1, and the area of the second part 512 is S2, satisfying S1:S2 = 1:(1-15).
[0058] In this embodiment, as Figures 3 to 7 As shown, the inner diameter of the suction port 51 is 10mm to 30mm. If the inner diameter of the suction port 51 is too large, it will affect the dimensions of the anode plate 20 and / or the diaphragm bag 30. If the inner diameter of the suction port 51 is too small, it will be unable to timely suction of the anolyte and acid mist. Furthermore, an excessively small inner diameter of the suction port 51 will affect the area of the first part 511 and the area of the second part 512, making it impossible to reasonably allocate the areas of the first part 511 and the second part 512, easily causing the anolyte to clog the suction tube 50, resulting in the inability to suction the acid mist. Preferably, the inner diameter of the suction port 51 is 15mm to 25mm. Specifically, the inner diameter of the suction tube 50 is 20mm, and the outer diameter is 25mm. This inner diameter ensures that the anolyte and acid mist can flow smoothly during suction, avoiding problems such as blockage and leakage. Of course, in practical applications, an appropriate inner diameter of the suction port 51 can be selected according to specific needs and conditions.
[0059] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.
[0060] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are quite specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.
Claims
1. An acid mist recovery system for an electrolytic cell, comprising a diaphragm bag fitted over an anode plate, wherein the diaphragm bag has a containment cavity for containing anolyte and acid mist; Its features are, Also includes: A suction tube with a suction port, the suction tube being connected to a receiving cavity; and A suction device, wherein the suction device is connected to a suction tube; The suction area of the suction port is divided into at least a first part and a second part. The first part is adapted to be immersed in the anolyte to extract the anolyte, and the second part is adapted to be exposed outside the anolyte to extract acid mist.
2. The acid mist recovery system for an electrolytic cell according to claim 1, characterized in that, The area of the first part is S1, and the area of the second part is S2, and the condition S1:S2 = 1:(0.5-20) is met.
3. An acid mist recovery system for an electrolytic cell according to claim 1 or 2, characterized in that, The area of the first part is S1, and the area of the second part is S2, and the condition S1:S2 = 1:(1-15) is satisfied.
4. An acid mist recovery system for an electrolytic cell according to claim 1 or 2, characterized in that, The inner diameter of the suction port is 10mm to 30mm.
5. The acid mist recovery system for an electrolytic cell according to claim 1, characterized in that, The inner diameter of the suction port is 15mm to 25mm.
6. The acid mist recovery system for an electrolytic cell according to claim 1, characterized in that, The suction tube passes through the diaphragm bag and is attached to the anode diaphragm frame.
7. The acid mist recovery system for an electrolytic cell according to claim 6, characterized in that, The anode diaphragm frame has a mounting portion for mounting the suction tube.
8. The acid mist recovery system for an electrolytic cell according to claim 1, characterized in that, The diaphragm bag is sealed.
9. The acid mist recovery system for an electrolytic cell according to claim 1, characterized in that, The diaphragm bag has a balance opening; The balance port and the suction port are located on opposite sides of the diaphragm bag.
10. An acid mist recovery system for an electrolytic cell according to claim 1, characterized in that, The suction port is located on the top side of the diaphragm bag.