CN219907892U - Electrolytic aluminum anode gas collection treatment device - Google Patents
Electrolytic aluminum anode gas collection treatment device Download PDFInfo
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- CN219907892U CN219907892U CN202321324714.9U CN202321324714U CN219907892U CN 219907892 U CN219907892 U CN 219907892U CN 202321324714 U CN202321324714 U CN 202321324714U CN 219907892 U CN219907892 U CN 219907892U
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- anode
- outlet
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- exhaust
- gas collection
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 38
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 35
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000004411 aluminium Substances 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 38
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 17
- 239000003546 flue gas Substances 0.000 claims description 17
- 238000010521 absorption reaction Methods 0.000 claims description 16
- 238000005868 electrolysis reaction Methods 0.000 claims description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- 229910021529 ammonia Inorganic materials 0.000 claims description 10
- 238000003487 electrochemical reaction Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model provides an electrolytic aluminum positive pole gas collection processing apparatus, includes the positive pole body that sets up in the aluminium cell, its positive pole body is last to be equipped with many perforation and forms the air vent, and the air inlet of air vent sets up on positive pole body collet, the gas outlet setting is at positive pole body top, establish the top of positive pole bodyThe exhaust branch pipes are matched with the air guide holes in number, the inlet of each exhaust branch pipe is connected with the outlet of the corresponding air guide hole, the outlet of each exhaust branch pipe is connected with the inlet of the exhaust manifold, the outlet of the exhaust manifold is connected with the inlet of the exhaust pump, and the outlet of the exhaust pump is connected with the CO through the buffer tank 2 The processing device is connected, the device is favorable for thinning the anode bottom palm bubble layer, improving the current efficiency and simultaneously collecting CO 2 The gas is treated to reduce CO 2 And (5) discharging.
Description
Technical Field
The utility model relates to an electrolytic aluminum anode gas collection treatment device.
Background
The cryolite-fused salt electrolysis method is adopted in the modern electrolytic aluminum industrial production, and CO can be generated in the anode bottom of the aluminum electrolysis cell due to the reaction principle and the property of the carbon anode 2 And (3) gas. With the progress of the reaction, gas gradually gathers at the anode bottom to form a bubble film with the thickness of about 2 cm, current transmission is hindered, anode overvoltage is increased, effective polar distance is reduced, secondary reaction with aluminum liquid is caused, and current efficiency is reduced.
With the development of the technical scale, the volume of the anode is larger and larger, resulting in larger area of the anode bottom, and CO generated by the anode bottom 2 The gas movement path is longer, resulting in anode bottom palm CO 2 The more difficult and timely to discharge the gas, the problem is paid attention to by all parties, the study on the discharge of the anode at home and abroad is mainly focused on a grooved anode, and the groove formed at the bottom of the anode can accelerate the discharge of the gas to a certain extent, but on one hand, the grooved height is limited and cannot work in the whole period of the anode; on the other hand, a large amount of bubbles still gather in the channel after slotting, electrolyte cannot escape in time, the slotting anode can reduce the voltage of 30mV at most, and energy conservation limitation exists for the anode overvoltage with the upper limit of 400 mV.
In addition, the existing electrolytic aluminum industry mainly treats the polluted gas and dust such as fluorine, sulfur and the like, and the flue gas has large discharge amount, complex components and CO 2 Low concentration, no special purpose for CO 2 Is caused to CO 2 The flue gas after purification is directly discharged, so that the need is urgentThe device can discharge the CO at the bottom of the anode 2 Simultaneous gas and CO 2 The gas is treated, so that the technical effect of two purposes is realized.
Disclosure of Invention
The utility model solves the defects of the prior art and provides the anode bottom palm bubble layer which is favorable for thinning the anode bottom palm bubble layer, improving the current efficiency and simultaneously collecting CO 2 The gas is treated to reduce CO 2 And a discharged electrolytic aluminum anode gas collection treatment device.
In order to achieve the above purpose, the utility model firstly provides an electrolytic aluminum anode gas collection treatment device, which comprises an anode body arranged in an aluminum electrolysis cell, wherein a plurality of through holes are formed in the anode body to form gas guide holes, gas inlets of the gas guide holes are arranged on a bottom palm of the anode body, gas outlets of the gas guide holes are arranged at the top of the anode body, exhaust branch pipes matched with the number of the gas guide holes are arranged above the anode body, an inlet of each exhaust branch pipe is connected with an outlet of a corresponding gas guide hole, an outlet of each exhaust branch pipe is connected with an inlet of an exhaust manifold, and an outlet of the exhaust manifold is connected with an inlet of an exhaust pump.
High concentration CO gathered on bottom palm of anode body 2 The flue gas is pumped into the buffer tank under the action of the exhaust pump, and the exhaust pump realizes the collection of high-concentration CO on the bottom palm of the anode body 2 The flue gas is actively discharged, thereby realizing the purpose of carrying out CO on the bottom palm of the anode body 2 The internal voltage of the aluminum electrolysis cell can be controlled in a proper range by actively controlling the thickness of the air film.
In this embodiment, the exhaust pump is connected to a control system, which is connected to a sensor for monitoring the voltage in the aluminum electrolysis cell. Thus, the voltage in the aluminum electrolytic cell is monitored in real time through the control system, and then the opening and closing and the power of the exhaust pump are controlled, so that the purpose of actively controlling the thickness of the anode air film is achieved.
In this embodiment, the exhaust branch pipe penetrates through the heat insulation layer at the top of the anode body and is connected with the air guide hole.
In this embodiment, the air inlets of the air holes are uniformly distributed on the bottom palm of the anode body.
In this embodiment, the pitch between the centers of the air inlets of the adjacent air guide holes is not more than 200mm.
In this embodiment, the outlet of the exhaust pump is connected with CO through a buffer tank 2 The processing device is connected. High concentration CO in buffer tank 2 The flue gas is led into the flue gas treatment device for treatment, thus greatly reducing CO 2 Is green and environment-friendly.
In this embodiment, the CO 2 The treatment device adopts an ammonia method CO 2 Flue gas trapping device, CO 2 The treatment device comprises an absorption tower and an ammonia removal tower, wherein one end of the absorption tower is provided with an ammonia water inlet, the other end of the absorption tower is connected with an air outlet of a buffer tank, the top of the absorption tower is provided with a pipeline connected with the ammonia removal tower, and the bottom of the absorption tower is provided with a liquid outlet and NH (NH) 4 HCO 3 Processing device is connected with the NH 4 HCO 3 The processing device processes NH 4 HCO 3 Solution treatment to agricultural NH 4 HCO 3 And (3) particles.
In this embodiment, the CO 2 The treatment device adopts a carbon dioxide electrochemical reduction device, the carbon dioxide electrochemical reduction device comprises an electrochemical reaction chamber, a cathode product collecting tank and an anode product collecting tank, the electrochemical reaction chamber comprises an anode chamber and a cathode chamber, the cathode product collecting tank is connected with the top of the cathode chamber, the anode product collecting tank is connected with the top of the anode chamber, and an air outlet of the buffer tank is communicated with the cathode chamber.
By adopting the structure, the device has simple structure, realizes the collection of high-concentration CO at the bottom palm of the electrolytic cell source-anode body through the cooperation of the air guide hole and the exhaust pump when the aluminum is produced by the molten salt electrolysis method of the aluminum cell 2 Is favorable for accelerating the discharge of anode gas and reducing CO 2 The thickness of the bubble layer improves the current efficiency and the operation stability of the aluminum electrolysis cell, and the high concentration CO is collected 2 The flue gas is treated, so that the production cost and the greenhouse gas emission of an aluminum electrolysis plant are greatly reduced, and the aluminum electrolysis plant is energy-saving and efficient, and meanwhile, has the advantages of cleanness and environmental protection.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the structure of the anode body of the present utility model;
FIG. 3 is a schematic view of the structure of the anode body of the present utility model in an aluminum electrolysis cell;
FIG. 4 is a schematic diagram of a flue gas treatment system according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of another embodiment of a flue gas treatment system according to the present utility model.
In the attached drawings, 1, an anode body; 11. an air guide hole; 12. an exhaust branch pipe; 13. a heat preservation layer; 14. an exhaust manifold; 2. an aluminum electrolysis cell; 3. an exhaust pump; 4. a control system; 5. a buffer tank; 6. a flue gas treatment device; 61. an absorption tower; 62. an ammonia removal tower; 63. NH (NH) 4 HCO 3 A processing device; 64. a cathode product collection tank; 65. an anode product collection tank; 66. an electrochemical reaction chamber.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.
Referring to fig. 1 to 5, an electrolytic aluminum anode gas collection treatment device comprises an anode body 1 arranged in an aluminum electrolysis cell 2, wherein a plurality of through holes are formed in the anode body 1 to form gas guide holes 11, gas inlets of the gas guide holes 11 are arranged on a bottom palm of the anode body 1, gas outlets of the gas guide holes 11 are arranged at the top of the anode body 1, and the gas inlets of the gas guide holes 11 are uniformly distributed on the bottom palm of the anode body 1The distance between the centers of the air inlets of adjacent air guide holes 11 is not more than 200mm, the exhaust branch pipes 12 which are matched with the air guide holes 11 in number are arranged above the anode body 1, the heat insulation layer 13 penetrating through the top of the anode body 1 of each exhaust branch pipe 12 is connected with the air guide holes 11, the inlet of each exhaust branch pipe 12 is connected with the outlet of the corresponding air guide hole 11, the outlet of each exhaust branch pipe 12 is connected with the inlet of the exhaust manifold 14, the outlet of the exhaust manifold 14 is connected with the inlet of the exhaust pump 3, and the outlet of the exhaust pump 3 is connected with CO through the buffer tank 5 2 The processing device is connected, the exhaust pump 3 is connected with the control system 4, and the control system 4 is connected with a sensor for monitoring voltage in the aluminum electrolysis cell 2.
By the mechanism, high-concentration CO gathered on bottom palm of the anode body 1 2 The flue gas is pumped into the buffer tank 5 under the action of the exhaust pump 3 and then is led into the flue gas treatment device 6, on one hand, the exhaust pump 3 realizes the high concentration CO gathered on the bottom palm of the anode body 1 2 The flue gas is actively discharged, thereby realizing the purpose of carrying out CO on the bottom palm of the anode body 1 2 Active control of the film thickness can control the internal voltage of the aluminium electrolysis cell 2 within a proper range, and on the other hand, the collected high-concentration CO 2 The flue gas is treated, thus greatly reducing CO 2 Is green and environment-friendly. Meanwhile, the voltage in the aluminum electrolysis cell 2 is monitored in real time through the control system 4, and then the opening and closing and the power of the exhaust pump 3 are controlled, so that the purpose of actively controlling the thickness of the anode air film is achieved.
As shown in FIG. 4, as CO 2 In one embodiment of the treatment device, the CO 2 The treatment device adopts an ammonia method CO 2 Flue gas trapping device, CO 2 The treatment device comprises an absorption tower 61 and an ammonia removal tower 62, wherein one end of the absorption tower 61 is provided with an ammonia water inlet, the other end of the absorption tower is connected with an air outlet of the buffer tank 5, the top of the absorption tower 61 is provided with a pipeline connected with the ammonia removal tower 62, and the bottom of the absorption tower 61 is provided with a liquid outlet and NH (NH) 4 HCO 3 Processing means 63 is connected to, said NH 4 HCO 3 The processing device 63 processes NH 4 HCO 3 Solution treatment to agricultural NH 4 HCO 3 And (3) particles.
As shown in FIG. 5, as CO 2 In another embodiment of the treatment device, the CO 2 The treatment device adopts a carbon dioxide electrochemical reduction device, the carbon dioxide electrochemical reduction device comprises an electrochemical reaction chamber 66, a cathode product collecting tank 64 and an anode product collecting tank 65, the electrochemical reaction chamber 66 comprises an anode chamber and a cathode chamber, the cathode product collecting tank 64 is connected with the top of the cathode chamber, the anode product collecting tank 65 is connected with the top of the anode chamber, and an air outlet of the buffer tank 5 is communicated with the anode chamber.
Example 1:
as shown in fig. 1 and 2, the diameter of the exhaust branch pipe 12 of the device is 30mm, the whole length is 260mm, the exhaust branch pipe 12 is inserted into the air guide hole 11 of the anode body 1 for 30mm deep, the upper part of the exhaust branch pipe 12 is kept above 200mm, and the exhaust branch pipe 12 can penetrate through the heat insulation layer 13.
Two rows of ten air guide holes 11 with the diameter of 20mm are uniformly and equidistantly designed on the anode bottom and 180mm away from the edge of the anode bottom so as to lead CO generated at any point of the anode bottom 2 The displacement distance required for the bubbles to escape the bottom of the anode is within 200mm. The method ensures that gas can be discharged in time, and the thickness of the bubble layer at the bottom of the anode and the bubble infiltration distance are effectively reduced, so that the purposes of shortening the polar distance, reducing the voltage of the electrolytic cell and reducing the power consumption per ton of aluminum are realized.
The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather utilizing equivalent structural changes made in the present utility model description and drawings or directly/indirectly applied to other related technical fields are included in the scope of the present utility model.
Claims (8)
1. The utility model provides an electrolytic aluminum positive pole gas collection processing apparatus, includes the positive pole body that sets up in the aluminium cell, its characterized in that: the anode body is provided with a plurality of through holes to form air guide holes, an air inlet of each air guide hole is arranged on the bottom palm of the anode body, an air outlet of each air guide hole is arranged at the top of the anode body, exhaust branch pipes matched with the number of the air guide holes are arranged above the anode body, an inlet of each exhaust branch pipe is connected with an outlet of the corresponding air guide hole, an outlet of each exhaust branch pipe is connected with an inlet of the exhaust manifold, and an outlet of the exhaust manifold is connected with an inlet of the exhaust pump.
2. The electrolytic aluminum anode gas collection treatment device according to claim 1, wherein: the exhaust pump is connected with a control system, and the control system is connected with a sensor for monitoring voltage in the aluminum electrolysis cell.
3. The electrolytic aluminum anode gas collection treatment device according to claim 1, wherein: the exhaust branch pipe penetrates through the heat insulation layer at the top of the anode body and is connected with the air guide hole.
4. The electrolytic aluminum anode gas collection treatment device according to claim 1, wherein: the air inlets of the air guide holes are uniformly distributed on the bottom palm of the anode body.
5. The electrolytic aluminum anode gas collection treatment device according to claim 4, wherein: the distance between the centers of the air inlets of the adjacent air guide holes is not more than 200mm.
6. The electrolytic aluminum anode gas collection treatment device according to any one of claims 1 to 5, wherein: the outlet of the exhaust pump is connected with CO through a buffer tank 2 The processing device is connected.
7. The electrolytic aluminum anode gas collection treatment device according to claim 6, wherein: the CO 2 The treatment device adopts an ammonia method CO 2 Flue gas trapping device, CO 2 The treatment device comprises an absorption tower and an ammonia removal tower, wherein one end of the absorption tower is provided with an ammonia water inlet, the other end of the absorption tower is connected with an air outlet of a buffer tank, the top of the absorption tower is provided with a pipeline connected with the ammonia removal tower, and the bottom of the absorption tower is provided with a liquid outlet and NH (NH) 4 HCO 3 Processing device is connected with the NH 4 HCO 3 The processing device processes NH 4 HCO 3 Solution treatment to agricultural NH 4 HCO 3 And (3) particles.
8. The electrolytic aluminum anode gas collection treatment device according to claim 6, wherein: the CO 2 The treatment device adopts a carbon dioxide electrochemical reduction device, the carbon dioxide electrochemical reduction device comprises an electrochemical reaction chamber, a cathode product collecting tank and an anode product collecting tank, the electrochemical reaction chamber comprises an anode chamber and a cathode chamber, and an air outlet of the buffer tank is communicated with the cathode chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321324714.9U CN219907892U (en) | 2023-05-29 | 2023-05-29 | Electrolytic aluminum anode gas collection treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321324714.9U CN219907892U (en) | 2023-05-29 | 2023-05-29 | Electrolytic aluminum anode gas collection treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219907892U true CN219907892U (en) | 2023-10-27 |
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ID=88434926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321324714.9U Active CN219907892U (en) | 2023-05-29 | 2023-05-29 | Electrolytic aluminum anode gas collection treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219907892U (en) |
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2023
- 2023-05-29 CN CN202321324714.9U patent/CN219907892U/en active Active
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