Cathode roasting flue gas purification device

Abstract

The utility model relates to a cathode roasting flue gas purification device which comprises a cooling tower, a tar removal piece, a wet desulfurization tower, a connecting piece and an independent wet-type electric precipitator, and the cooling tower can cool flue gas generated by cathode roasting; the tar removal part is connected with the cooling tower; the wet desulfurization tower is connected with the tar removal part and can remove sulfur dioxide in the flue gas; the independent electric dust remover is connected with the wet desulfurization tower and can remove dust in the flue gas; and the connecting piece is connected with the cooling tower, the tar capturing tower, the wet desulfurization tower and the independent wet-type electric dust remover. The technical scheme provided by the utility model has the beneficial technical effects that the tar removal part is independently adopted to remove the tar firstly, so that the tar can be prevented from entering the wet desulfurization tower, and the influence of the tar on the wet desulfurization tower is further avoided. Moreover, gas such as tar, sulfur dioxide and dust in the cathode roasting flue gas can be effectively purified. The problem of overlong consumption in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas purification, specifically to a cathode roasting flue gas purification device. Background Technology

[0002] With the recovery in demand for aluminum and the gradual resumption of production by electrolytic aluminum companies, the entire cathode carbon block market is also gradually improving. Cathode roasting furnaces are important production tools for cathode carbon products. Since the raw materials for cathode carbon products are mostly pitch coke, petroleum coke, and anthracite, a large amount of complex roasting flue gas is generated during the production process.

[0003] In treating roasting flue gas, enterprises primarily focus on controlling asphalt fumes, dust, and fluorides. In recent years, sulfur dioxide and benzo[a]pyrene in roasting flue gas have also received attention. During long-term use, roasting flue gas purification systems often experience unstable operation and fail to consistently meet emission standards. The most direct manifestation of this is the frequent emission of yellow, black, or brown smoke from the chimney.

[0004] Currently, the main processes used in cathode baking in my country are as follows:

[0005] 1. "Cooling tower + electrostatic precipitator series process" This solution is the earliest treatment method, but it cannot remove sulfur dioxide and dust from flue gas. After long-term operation, it can no longer meet the latest environmental protection emission standards.

[0006] 2. "Cooling tower + alumina dry adsorption" This method cannot remove sulfur dioxide from flue gas, and its applicability is limited. When the asphalt fume content is high, this technology cannot be used alone.

[0007] Therefore, it is very necessary to provide a cathode roasting flue gas purification device to solve the above-mentioned technical problems. Utility Model Content

[0008] Based on the above description, this utility model provides a cathode roasting flue gas purification device to solve the problem that the cathode roasting process in the prior art takes a long time to reach the emission standards.

[0009] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A cathode roasting flue gas purification device includes a cooling tower, a tar removal component, a wet desulfurization tower, and a connecting component. The cooling tower can cool the flue gas generated by cathode roasting; the tar removal component is connected to the cooling tower and can remove tar from the flue gas; the wet desulfurization tower is connected to the tar removal component and can remove sulfur dioxide from the flue gas; the connecting component is connected to the cooling tower, the tar removal component, and the wet desulfurization tower.

[0010] Furthermore, the connector includes a flue gas inlet and a first flue. The flue gas inlet is connected to the cooling tower; one end of the first flue is connected to the flue gas inlet, and the other end of the first flue is connected to the cooling tower.

[0011] Furthermore, the tar removal unit includes a first tar capture tower and a second tar capture tower, the inlet ends of the first tar capture tower and the second tar capture tower are both connected to the cooling tower, and the outlet ends of the first tar capture tower and the second tar capture tower are both connected to the wet desulfurization tower.

[0012] Furthermore, it also includes a tar collection device, which comprises a tar settling tank, a first tar connecting pipe, and a second tar connecting pipe. The tar settling tank is located below the first tar capture tower and the second tar capture tower. One end of the first tar connecting pipe is connected to the first tar capture tower, and the other end of the first tar connecting pipe is connected to the tar settling tank. One end of the second tar connecting pipe is connected to the second tar capture tower, and the other end of the second tar connecting pipe is connected to the tar settling tank.

[0013] Furthermore, the connecting component includes a second flue, a third flue, a first valve, and a second valve. One end of the second flue is connected to the cooling tower, and the other end of the second flue is connected to the first tar capture tower. One end of the third flue is connected to the cooling tower, and the other end of the third flue is connected to the second tar capture tower. The first valve is connected to the second flue and can control the opening and closing of the channel between the cooling tower and the first tar capture tower. The second valve is connected to the third flue and can control the opening and closing of the channel between the cooling tower and the second tar capture tower.

[0014] Furthermore, the connecting components include a fourth flue, a fifth flue, an auxiliary flue, a third valve, and a fourth valve. One end of the fourth flue is connected to the first tar capture tower, and the other end is connected to the wet desulfurization tower. One end of the fifth flue is connected to the second tar capture tower, and the other end is connected to the middle of the fourth flue. One end of the auxiliary flue is connected to the fourth flue, and the other end is connected to the wet desulfurization tower. The third valve is connected to the fourth flue and can control the opening and closing of the channel between the first tar capture tower and the wet desulfurization tower. The fourth valve is connected to the fifth flue and can control the opening and closing of the channel between the second tar capture tower and the wet desulfurization tower.

[0015] Furthermore, it also includes a first induced draft fan and a second induced draft fan, wherein the first induced draft fan is connected to one end of the fourth flue near the wet desulfurization tower; and the second induced draft fan is connected to the middle of the auxiliary flue.

[0016] Furthermore, the connecting component includes a fifth valve, a sixth valve, a seventh valve, and an eighth valve. The fifth valve is connected to the fourth flue and is located in front of the first induced draft fan; the sixth valve is connected to the fourth flue and is located behind the first induced draft fan; the seventh valve is connected to the auxiliary flue and is located in front of the second induced draft fan; and the eighth valve is connected to the auxiliary flue and is located behind the second induced draft fan.

[0017] Furthermore, it includes an independent wet electrostatic precipitator and a dust collection device. The independent wet electrostatic precipitator is connected to the wet desulfurization tower. A chimney is connected to the upper end of the independent wet electrostatic precipitator. The independent wet electrostatic precipitator can remove dust and residual tar from the purified flue gas and discharge the purified flue gas through the chimney. The dust collection device is located on the lower side of the independent wet electrostatic precipitator and can collect dust and residual tar inside the independent wet electrostatic precipitator.

[0018] Furthermore, the connector includes a sixth flue, one end of which is connected to the wet desulfurization tower, and the other end of which is connected to the independent wet electrostatic precipitator.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0020] This application employs a separate tar removal unit to pre-remove tar, preventing tar from entering the wet desulfurization tower and thus avoiding its impact. Furthermore, this application effectively purifies gases such as tar, sulfur dioxide, and dust from the cathode roasting flue gas. It solves the problem that existing cathode roasting processes require a long time to meet emission standards. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of a cathode roasting flue gas purification device provided in an embodiment of this utility model;

[0022] Figure 2 for Figure 1 Enlarged structural diagram at point Q;

[0023] Figure 3 for Figure 1 Enlarged structural diagram at point W;

[0024] Figure 4 for Figure 1 A magnified structural diagram at point E in the middle.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Cooling tower;

[0027] 2. Tar removal components; 21. First tar capture tower; 22. Second tar capture tower;

[0028] 3. Wet desulfurization tower;

[0029] 4. Connecting parts; 41. Flue gas inlet; 42. First flue;

[0030] 43. Second flue; 431. First valve;

[0031] 44. Third flue; 441. Second valve;

[0032] 45. Fourth flue; 451. Third valve; 452. Fifth valve; 453. Sixth valve;

[0033] 46. ​​Fifth flue; 461. Fourth valve;

[0034] 47. Auxiliary flue; 471. Seventh valve; 472. Eighth valve;

[0035] 48. Sixth flue;

[0036] 5. Tar collection component; 51. Tar settling tank; 52. First tar connecting pipe; 53. Second tar connecting pipe;

[0037] 6. First induced draft fan; 7. Second induced draft fan;

[0038] 8. Independent wet electrostatic precipitator; 81. Chimney;

[0039] 9. Dust collection components. Detailed Implementation

[0040] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0041] 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 in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0042] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0043] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0044] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0045] like Figures 1 to 4 As shown, a cathode roasting flue gas purification device includes a cooling tower 1, a tar removal component 2, a wet desulfurization tower 3, and a connecting component 4. The cooling tower 1 is capable of cooling the flue gas generated during cathode roasting; the tar removal component 2 is connected to the cooling tower 1 and is capable of removing tar from the flue gas; the wet desulfurization tower 3 is connected to the tar removal component 2 and is capable of removing sulfur dioxide from the flue gas; the connecting component 4 is connected to the cooling tower 1, the tar removal component 2, and the wet desulfurization tower 3.

[0046] In this embodiment, the main function of cooling tower 1 is to cool the flue gas generated during the cathode roasting process. In industrial production, especially in processes involving high-temperature roasting, the generated flue gas often carries a high temperature. Direct discharge or subsequent treatment may damage the equipment or affect the treatment effect. The main working principle of cooling tower 1 is as follows: dry (low enthalpy) air is drawn into the cooling tower through the air inlet after being driven by a fan; high-temperature water molecules with high saturated vapor pressure flow towards the low-pressure air, and hot, humid (high enthalpy) water is sprayed into the tower from the water distribution system. When the water droplets come into contact with the air, on the one hand, due to direct heat transfer between the air and the air, and on the other hand, due to the pressure difference between the water vapor surface and the air, evaporation occurs under the action of pressure, carrying away the latent heat of vaporization, thus achieving the purpose of cooling and meeting the working conditions of subsequent processes. Secondly, tar removal unit 2 is connected to cooling tower 1 and is responsible for removing tar components from the cooled flue gas. Tar is a byproduct of industrial production, containing substances harmful to the environment. If not removed, it can affect the normal operation of subsequent processing equipment. The tar removal unit 2 employs an electrostatic precipitator, which uses a high-voltage DC electric field to separate tar droplets. Under normal circumstances, gases are non-conductive, but under a high-voltage electric field, electrons within the gas gain sufficient energy to become free electrons and conduct electricity. All ionized positive and negative ions fill the entire space between the corona electrode and the precipitating electrode. When coal gas containing tar droplets and other impurities passes through this electric field, the impurities, having adsorbed negative ions and electrons, move to the precipitating electrode under the influence of the Coulomb force, releasing their charge and adsorbing onto the electrode, thus purifying the gas. When the amount of impurities adsorbed on the precipitating electrode exceeds its adhesion force, it automatically flows downwards and is discharged from the bottom of the tar electrostatic precipitator. The clean gas leaves from the top of the tar electrostatic precipitator and enters the next process. Compared to mechanical tar removers, the tar electrostatic precipitator features high tar removal efficiency, low resistance loss, and large gas throughput. This not only ensures the gas quality requirements of subsequent processes and improves product recovery rate, but also significantly improves the operating environment. Furthermore, the wet desulfurization tower 3, connected to the tar removal unit, is a crucial component of the flue gas treatment system. Wet desulfurization technology utilizes a solution containing a desulfurizing agent to contact the flue gas, absorbing sulfur dioxide through a chemical reaction, thereby reducing sulfur oxide emissions. Limestone-gypsum wet desulfurization technology can remove various sulfur-containing gases from flue gas. It utilizes limestone or lime slurry to absorb SO2 from the flue gas, generating calcium sulfite. The separated calcium sulfite can be discarded or oxidized to calcium sulfate for recovery as gypsum. It is currently the most mature and stable desulfurization process in the world, achieving a desulfurization efficiency of over 90%. Wet flue gas desulfurization technology involves a gas-liquid reaction, resulting in a fast reaction rate and high desulfurization efficiency, generally exceeding 90%. It is a mature technology with wide applicability.Wet desulfurization technology is relatively mature, with safe and reliable operation. Among numerous desulfurization technologies, it has consistently maintained a dominant position, accounting for over 80% of the total installed capacity. A wet desulfurization tower 3 typically includes a spray system, a reaction zone, and a demister, ensuring desulfurization efficiency and emission quality. This application independently employs a tar removal component 2 to remove tar first, preventing tar from entering the wet desulfurization tower 3 and thus avoiding its impact. Furthermore, this application effectively purifies gases such as tar, sulfur dioxide, and dust in the cathode roasting flue gas. It solves the problem that existing cathode roasting processes require a long time to meet emission standards.

[0047] In some embodiments, the connector 4 includes a flue gas inlet 41 and a first flue 42. The flue gas inlet 41 is connected to the cooling tower 1. One end of the first flue 42 is connected to the flue gas inlet 41, and the other end of the first flue 42 is connected to the cooling tower 1.

[0048] In this embodiment, one end of the first flue 42 is connected to the flue gas inlet 41, and the other end is connected to the cooling tower 1. This allows the flue gas generated during cathode baking to be introduced into the cooling tower 1.

[0049] In some embodiments, the tar removal unit 2 includes a first tar capture tower 21 and a second tar capture tower 22. The air inlets of the first tar capture tower 21 and the second tar capture tower 22 are both connected to the cooling tower 1, and the air outlets of the first tar capture tower 21 and the second tar capture tower 22 are both connected to the wet desulfurization tower 3.

[0050] In this embodiment, because tar has high viscosity, it can easily affect the operation of the tar capture tower. Therefore, two tar capture devices are installed as backups for each other, thereby avoiding the problem of the entire flue gas treatment equipment shutting down due to the failure of a single electrostatic tar capture device.

[0051] In some embodiments, the system further includes a tar collection device 5, which includes a tar settling tank 51, a first tar connecting pipe 52, and a second tar connecting pipe 53. The tar settling tank 51 is located below the first tar capture tower 21 and the second tar capture tower 22. One end of the first tar connecting pipe 52 is connected to the first tar capture tower 21, and the other end of the first tar connecting pipe 52 is connected to the tar settling tank 51. One end of the second tar connecting pipe 53 is connected to the second tar capture tower 22, and the other end of the second tar connecting pipe 53 is connected to the tar settling tank 51.

[0052] In this embodiment, the tar removed from the two tar capture towers flows into the tar settling tank 51. The tar is collected centrally in the settling tank 51, facilitating subsequent processing or disposal steps. This design not only improves the overall efficiency of the system but also helps reduce environmental pollution and safety hazards.

[0053] In some embodiments, the connector 4 includes a second flue 43, a third flue 44, a first valve 431, and a second valve 441. One end of the second flue 43 is connected to the cooling tower 1, and the other end of the second flue 43 is connected to the first tar capture tower 21. One end of the third flue 44 is connected to the cooling tower 1, and the other end of the third flue 44 is connected to the second tar capture tower 22. The first valve 431 is connected to the second flue 43 and can control the opening and closing of the channel between the cooling tower 1 and the first tar capture tower 21. The second valve 441 is connected to the third flue 44 and can control the opening and closing of the channel between the cooling tower 1 and the second tar capture tower 22.

[0054] In this embodiment, the first valve 431 is installed on the second flue 43 to control the opening and closing of the passage between the cooling tower 1 and the first tar capture tower 21. By operating the first valve 431, the system can flexibly adjust the flow direction of the flue gas. For example, when it is necessary to maintain the first tar capture tower 21 or treat a specific type of flue gas, the first valve 431 can be closed, causing the flue gas to be diverted to the second tar capture tower 22. The operating principle of the first valve 431 is similar to that of the second valve 432, and will not be described in detail here.

[0055] In some embodiments, the connector 4 includes a fourth flue 45, a fifth flue 46, an auxiliary flue 47, a third valve 451, and a fourth valve 461. One end of the fourth flue 45 is connected to the first tar capture tower 21, and the other end of the fourth flue 45 is connected to the wet desulfurization tower 3. One end of the fifth flue 46 is connected to the second tar capture tower 22, and the other end of the fifth flue 46 is connected to the middle of the fourth flue 45. One end of the auxiliary flue 47 is connected to the fourth flue 45, and the other end of the auxiliary flue 47 is connected to the wet desulfurization tower 3. The third valve 451 is connected to the fourth flue 45 and can control the opening and closing of the channel between the first tar capture tower 21 and the wet desulfurization tower 3. The fourth valve 461 is connected to the fifth flue 46 and can control the opening and closing of the channel between the second tar capture tower 22 and the wet desulfurization tower 3.

[0056] In this embodiment, the third valve 451 is installed on the fourth flue 45 and is used to control the opening and closing of the channel between the first tar capture tower 21 and the wet desulfurization tower 3. By operating the third valve 451, the system can flexibly adjust the flow direction of the flue gas. For example, when it is necessary to maintain the wet desulfurization tower or treat a specific type of flue gas, the third valve 451 can be closed to divert or suspend the treatment of the flue gas. The operating principle of the fourth valve 461 is similar to that of the third valve 451, and will not be described in detail here.

[0057] In some embodiments, the system further includes a first induced draft fan 6 and a second induced draft fan 7, wherein the first induced draft fan 6 is connected to one end of the fourth flue 45 near the wet desulfurization tower 3; and the second induced draft fan 7 is connected to the middle of the auxiliary flue 47.

[0058] In this embodiment, the main function of the first induced draft fan 6 and the second induced draft fan 7 is to provide power to help the flue gas smoothly enter the fourth flue duct 45 from the first tar capture tower 21 and the second tar capture tower 22, and finally flow to the wet desulfurization tower 3. This ensures that the flue gas will not stagnate or backflow due to excessive resistance during the treatment process, thus guaranteeing the continuity and stability of the system.

[0059] In some embodiments, the connector 4 includes a fifth valve 452, a sixth valve 453, a seventh valve 471, and an eighth valve 472. The fifth valve 452 is connected to the fourth flue 45 and is located in front of the first induced draft fan 6. The sixth valve 453 is connected to the fourth flue 45 and is located behind the first induced draft fan 6. The seventh valve 471 is connected to the auxiliary flue 47 and is located in front of the second induced draft fan 7. The eighth valve 472 is connected to the auxiliary flue 47 and is located behind the second induced draft fan 7.

[0060] In this embodiment, the first induced draft fan 6 is opened and closed using the fifth valve 452 and the sixth valve 453, and the second induced draft fan 7 is opened and closed using the seventh valve 471 and the eighth valve 472. When the first induced draft fan 6 needs to reduce its power or requires maintenance, the second induced draft fan 7 is opened to ensure the normal operation of the process. Furthermore, the valves in this application are electrically operated dampers.

[0061] In some embodiments, the system includes an independent wet electrostatic precipitator 8 and a dust collection unit 9. The independent wet electrostatic precipitator 8 is connected to the wet desulfurization tower 3. A chimney 81 is connected to the upper end of the independent wet electrostatic precipitator 8. The independent wet electrostatic precipitator 8 can remove dust and residual tar from the purified flue gas and discharge the purified flue gas through the chimney 81. The dust collection unit 9 is located on the lower side of the independent wet electrostatic precipitator 8 and can collect dust and residual tar inside the independent wet electrostatic precipitator 8.

[0062] In this embodiment, the main function of the independent wet electrostatic precipitator 8 is to remove fine dust particles from the flue gas after treatment by the wet desulfurization tower. These dust particles may have not been completely removed during previous treatment processes or may be newly generated during the desulfurization process. The independent wet electrostatic precipitator 8 uses an electric field to charge the dust particles in the flue gas, which are then collected onto the collection plate of the precipitator under the action of the electric field force, thereby achieving dust removal. Subsequently, the purified flue gas is discharged through the chimney 81. In addition, in order to ensure sufficient diffusion and dilution of the flue gas, the chimney 81 usually has a certain height. This height needs to be determined according to the specific emission standards and environmental conditions to ensure that the emitted flue gas can meet the prescribed emission concentration limits. The independent wet electrostatic precipitator 8 can remove dust from flue gas, achieving ultra-clean emission standards. Its main working principle is as follows: First, water mist is sprayed onto the discharge electrode and corona zone. The water mist becomes charged and further atomized within the strong corona field formed by the spiked electrodes. The electric field force, the collision interception of the charged water mist, and adsorption and condensation work together to capture dust particles. Finally, the dust particles reach the collecting electrode under the drive of the electric field force and are captured. Simultaneously, a continuous water film forms on the collecting electrode, washing the captured dust into the ash hopper and discharging it with the water into the dust collection unit 9, without affecting the operation of the desulfurization system. The working principle of the wet electrostatic precipitator differs from that of the dry electrostatic precipitator. The wet electrostatic precipitator captures dust through water mist; therefore, it can effectively capture dust with high resistivity, ensuring the emission quality of the flue gas. The main function of the dust collection unit 9 is to collect the dust generated by the independent wet electrostatic precipitator 8 during the flue gas treatment process. The independent wet electrostatic precipitator 8 uses an electric field to charge dust particles in the flue gas, which are then collected onto the collection plate of the precipitator under the influence of the electric field force. However, over time, dust gradually accumulates on the collection plate, at which point a dust collection element 9 is needed to collect and store this dust to prevent it from being released back into the flue gas or causing environmental pollution.

[0063] In some embodiments, the connector 4 includes a sixth flue 48, one end of which is connected to the wet desulfurization tower 3, and the other end of which is connected to the independent wet electrostatic precipitator 8.

[0064] In this embodiment, one end of the sixth flue 48 is connected to the wet desulfurization tower 3, and the other end is connected to the independent wet electrostatic precipitator 8, so as to connect the wet desulfurization tower 3 and the independent wet electrostatic precipitator 8, thereby facilitating the subsequent process flow.

[0065] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0066] This application employs a separate tar removal unit to pre-remove tar, preventing tar from entering the wet desulfurization tower and thus avoiding its impact. Furthermore, this application effectively purifies gases such as tar, sulfur dioxide, and dust from the cathode roasting flue gas. It solves the problem that existing cathode roasting processes require a long time to meet emission standards.

[0067] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for cleaning cathode baking fumes, characterized in that The application relates to a cooling system for flue gas generated by cathode baking, which comprises the following components: a cooling tower (1) capable of cooling flue gas generated by cathode baking; a tar removal component (2) connected with the cooling tower (1), which is capable of removing tar in the flue gas; a wet desulfurization tower (3) connected with the tar removal component (2), which is capable of removing sulfur dioxide in the flue gas; a connecting component (4) connected with the cooling tower (1), the tar removal component (2) and the wet desulfurization tower (3).

2. A device for cleaning the fumes from the cathode baking according to claim 1, characterized in that, The connecting component (4) comprises: a flue gas access end (41) connected with the cooling tower (1); a first flue (42) with one end connected with the flue gas access end (41) and the other end connected with the cooling tower (1).

3. The device for purifying the fumes of the cathode baking according to claim 1, characterized in that, The tar removal component (2) comprises a first tar capturing tower (21) and a second tar capturing tower (22), and the air inlet ends of the first tar capturing tower (21) and the second tar capturing tower (22) are connected with the cooling tower (1), and the air outlet ends of the first tar capturing tower (21) and the second tar capturing tower (22) are connected with the wet desulfurization tower (3).

4. A device for cleaning the fumes from the baking of a cathode according to claim 3, characterized in that The application further comprises a tar collecting component (5) comprising: a tar precipitation tank (51) arranged at the lower side of the first tar capturing tower (21) and the second tar capturing tower (22); a first tar connecting pipe (52) with one end connected with the first tar capturing tower (21) and the other end connected with the tar precipitation tank (51); a second tar connecting pipe (53) with one end connected with the second tar capturing tower (22) and the other end connected with the tar precipitation tank (51).

5. A device for cleaning the fumes from the baking of a cathode according to claim 3, characterized in that The connecting component (4) comprises: a second flue (43) with one end connected with the cooling tower (1) and the other end connected with the first tar capturing tower (21); a third flue (44) with one end connected with the cooling tower (1) and the other end connected with the second tar capturing tower (22); a first valve (431) connected with the second flue (43), which is capable of controlling the opening and closing of the channel between the cooling tower (1) and the first tar capturing tower (21); a second valve (441) connected with the third flue (44), which is capable of controlling the opening and closing of the channel between the cooling tower (1) and the second tar capturing tower (22).

6. A device for cleaning fumes from a cathode baking process according to claim 3, characterized in that The connecting component (4) comprises: a fourth flue (45) with one end connected with the first tar capturing tower (21) and the other end connected with the wet desulfurization tower (3); a fifth flue (46) with one end connected with the second tar capturing tower (22) and the other end connected with the middle part of the fourth flue (45); an auxiliary flue (47) with one end connected with the fourth flue (45) and the other end connected with the wet desulfurization tower (3). A third valve (451) is connected to the fourth flue (45), and the third valve (451) can control the opening and closing of the passage between the first tar capturing tower (21) and the wet desulfurization tower (3); A fourth valve (461) is connected to the fifth flue (46), and the fourth valve (461) can control the opening and closing of the passage between the second tar capturing tower (22) and the wet desulfurization tower (3).

7. A device for cleaning fumes from the roasting of a cathode according to claim 6, characterized in that Further comprising: A first induced draft fan (6) is connected to one end of the fourth flue (45) near the wet desulfurization tower (3); A second induced draft fan (7) is connected to the middle of the auxiliary flue (47).

8. A device for cleaning fumes from a cathode baking according to claim 7, characterized in that The connecting member (4) comprises: A fifth valve (452) is connected to the fourth flue (45) and located in front of the first induced draft fan (6); A sixth valve (453) is connected to the fourth flue (45) and located behind the first induced draft fan (6); A seventh valve (471) is connected to the auxiliary flue (47) and located in front of the second induced draft fan (7); An eighth valve (472) is connected to the auxiliary flue (47) and located behind the second induced draft fan (7).

9. The device for cleaning the fumes of the cathode baking according to claim 1, characterized in that, Comprising: A separate wet electric precipitator (8) is connected to the wet desulfurization tower (3), and a chimney (81) is connected to the upper end of the separate wet electric precipitator (8), and the separate wet electric precipitator (8) can remove dust and residual tar from the purified flue gas and discharge the purified flue gas through the chimney (81); A dust collecting member (9) is arranged on the lower side of the separate wet electric precipitator (8) and can collect dust and residual tar in the separate wet electric precipitator (8).

10. A device for cleaning the fumes from the roasting of a cathode according to claim 9, characterized in that, The connecting member (4) comprises: A sixth flue (48) is connected to the wet desulfurization tower (3) at one end, and the other end of the sixth flue (48) is connected to the separate wet electric precipitator (8).

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