Prebaked anode calcination flue gas treatment device and treatment method for electrolytic aluminum

Abstract

The invention relates to the technical field of flue gas treatment, and provides a pre-baked anode calcination flue gas treatment device and method for electrolytic aluminum, the treatment device comprises a main body, and the main body is provided with a containing space; a plurality of anode tubes are arranged in the accommodating space in sequence; a cathode wire is arranged in each anode tube in a penetrating manner, and the cathode wires can adsorb impurities in the flue gas into the anode tubes after being electrified; the spraying piece is arranged in the accommodating space; and a plurality of rotating sheets are arranged, and one rotating sheet is rotationally arranged in each anode tube. The invention further provides a treatment method for the calcination flue gas of the prebaked anode for electrolytic aluminum. The treatment method comprises the steps that the flue gas is introduced into the denitration piece for denitration; introducing the denitrated flue gas into a desulfurization tower for desulfurization; removing impurities from the desulfurized flue gas; and introducing the flue gas subjected to impurity removal into a white smoke removal tower. According to the technical scheme, the technical problem that more water sources are used during self-cleaning of the flue gas treatment device in the prior art is solved.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of flue gas treatment, and in particular, to a device and method for treating flue gas from prebaked anode calcination for electrolytic aluminum. Background Art

[0002] In the electrolytic aluminum industry, the prebaked anode calcination process produces a large amount of flue gas, which has complex components and contains a variety of pollutants, such as nitrogen oxides (NOx), sulfur oxides (SOx), dust particles and other harmful substances.

[0003] At present, the traditional method for treating flue gas from prebaked anode calcination is to first use denitrification and desulfurization equipment to denitrify and desulfurize the flue gas, and then transport the treated flue gas to a wet electrostatic precipitator for further impurity removal. Although the wet electrostatic precipitator can effectively remove impurities such as dust particles in the flue gas, it still has some shortcomings in actual use.

[0004] Among them, the existing automatic cleaning methods of wet electrostatic precipitators mostly rely on the spray system. Through long-term spraying, the impurity dust adsorbed on the electrode plate or the inner wall of the anode tube is washed away by the flushing effect of the water flow, so as to achieve the purpose of automatic cleaning. This method uses a lot of water sources and does not meet the current requirements of energy conservation, emission reduction and sustainable development. Summary of the invention

[0005] To overcome the above-mentioned defects, the embodiments of the present disclosure provide a device and method for treating flue gas from prebaked anode calcination for electrolytic aluminum, which solves the technical problem in the prior art that a large amount of water is used in self-cleaning of the flue gas treatment device.

[0006] According to one aspect, at least one embodiment of the present disclosure provides a prebaked anode calcination flue gas treatment device for electrolytic aluminum, comprising: A main body, wherein the main body has a containing space, and the containing space has an air inlet and an air outlet; Anode tubes, wherein the anode tubes are arranged in sequence in the accommodation space, and the smoke passes through the air inlet, the anode tubes and the air outlet in sequence. Each anode tube is provided with a cathode wire, and the cathode wire can absorb impurities in the flue gas onto the inner wall of the anode tube after being energized; A spraying member, the spraying member is arranged in the accommodating space and located above the accommodating space, and the spraying member is used for spraying water to clean the anode tube; There are several rotating plates, one of which is rotatably arranged in each anode tube, and the rotating plate can rotate relative to the anode tube to throw the spray water toward the inner wall of the anode tube.

[0007] For example, in a prebaked anode calcining flue gas treatment device for electrolytic aluminum provided in at least one embodiment of the present disclosure, the upper end surface of the rotating plate has a water containing cavity, the lower end surface of the rotating plate has a guide member, the guide member has a guide surface extending outward and downward to guide water flow to the inner wall of the anode tube, and the rotating plate is provided with a guide hole that is connected to the water containing cavity and is used to guide water flow to the guide member.

[0008] For example, in at least one embodiment of the present disclosure, a prebaked anode calcination fume treatment device for electrolytic aluminum is provided, wherein the main body comprises: A shell, the air inlet and the air outlet are both located on the shell, and the interior of the shell forms the accommodating space; an upper mounting frame, wherein the upper mounting frame is arranged in the accommodating space; A lower mounting frame, wherein the lower mounting frame is arranged in the accommodation space and is correspondingly located below the upper mounting frame, and the anode tube is arranged between the upper mounting frame and the lower mounting frame along the up-down direction; There are several mounting columns, and the upper mounting frame and the lower mounting frame are each provided with several mounting columns arranged transversely, one end of the cathode wire is arranged on a mounting column of the upper mounting frame, and the other end is arranged on a mounting column of the lower mounting frame, and each of the mounting columns is provided with several cathode wires arranged longitudinally.

[0009] For example, in a prebaked anode calcining fume treatment device for electrolytic aluminum provided in at least one embodiment of the present disclosure, the rotating plate has an inner gear ring, and further includes: A mounting plate, the mounting plate is located in the anode tube, the rotating plate is rotatably arranged on the mounting plate, and the rotating plate is coaxially arranged with the mounting plate; The first gear is eccentrically rotatably arranged on the mounting plate, and the first gear is meshed with the inner gear ring to drive the rotating plate to rotate.

[0010] For example, at least one embodiment of the present disclosure provides a prebaked anode calcination fume treatment device for electrolytic aluminum, which further includes: A second mounting frame, the second mounting frame is arranged on the upper mounting frame, the second mounting frame is a hollow structure, and the second mounting frame is used for passing gas; A wind wheel, the wind wheel is rotatably arranged in the second mounting frame, and the wind wheel can rotate driven by the gas; A rotating shaft, the rotating shaft is rotatably arranged on the second mounting frame, and one end of the rotating shaft is arranged on the wind wheel; A rotating disk, which is arranged on the other end of the rotating shaft and is located outside the second mounting frame, and has an outer gear ring; a second gear meshing with the outer gear ring; A connecting rod is connected between the first gear and the second gear, and is used to drive the first gear to rotate under the action of the second gear.

[0011] For example, in a fume treatment device for prebaked anode calcination for electrolytic aluminum provided in at least one embodiment of the present disclosure, the rotating plate is lifted and lowered in the anode tube, and the rotating disk is lifted and lowered on the rotating shaft.

[0012] For example, in a prebaked anode calcining flue gas treatment device for electrolytic aluminum provided in at least one embodiment of the present disclosure, the rotating shaft has a spiral groove, the inner wall of the turntable has a protrusion that is aligned with the spiral groove, and the turntable can descend with the cooperation of the protrusion and the spiral groove, and after descending, it is used to drive the rotating sheet to extend into the anode tube.

[0013] For example, at least one embodiment of the present disclosure provides a prebaked anode calcination fume treatment device for electrolytic aluminum, which further includes: An elastic member, one end of which is arranged on the turntable, and the other end of which is arranged on the second mounting frame, and the elastic member is used to elastically push the turntable upward.

[0014] For example, at least one embodiment of the present disclosure provides a prebaked anode calcination fume treatment device for electrolytic aluminum, which further includes: Denitrification parts; A desulfurization tower, connected to the gas outlet of the denitrification component and used to receive the denitrification flue gas in the denitrification component, the desulfurization tower is connected to the gas inlet; A de-whitening tower is connected to the air outlet and is used to receive the smoke from the air outlet and reduce the humidity of the smoke.

[0015] According to another aspect, at least one embodiment of the present disclosure further provides a method for treating flue gas from calcining prebaked anodes for electrolytic aluminum, comprising the following steps: S1. Pass the flue gas into the denitrification device for denitrification; S2, passing the denitrified flue gas into a desulfurization tower for desulfurization; S3, passing the desulfurized flue gas into the air inlet, after the cathode wire is energized, an electric field is formed between the cathode wire and the anode tube, and the electric field adsorbs impurities to the inner wall of the anode tube; S3, start the spraying part, introduce gas to drive the wind wheel to rotate, and then control the rotating piece to descend and rotate in the anode tube; S4. Pass the flue gas after impurities removal into the de-whitening tower, reduce the flue gas temperature to below the dew point, and condense the water vapor into liquid water for separation.

[0016] The beneficial effects of the embodiments of the present disclosure are: In the present disclosure, in order to save water and improve the cleaning efficiency, a rotating piece is rotatably arranged in each anode tube, and the diameter of the rotating piece is smaller than the diameter of the internal cavity of the anode tube, so as to ensure that the water flow can flow through the inner wall of the anode tube and prevent the anode tube from being blocked by the rotating piece. In order to enhance the effect of the rotating piece and spray the spray water to the inner wall of the anode tube as much as possible, the present disclosure rotates the rotating piece to throw the spray water received by the upper end surface of the rotating piece to the inner wall of the anode tube, thereby enhancing the cleaning effect. The arrangement of the spraying part and the rotating piece can clean the anode tube regularly, prevent impurities from accumulating on the inner wall of the anode tube, ensure the long-term stable operation of the device, and extend the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments of the present disclosure. Obviously, the drawings described below are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on the contents of the exemplary embodiments of the present disclosure and these drawings without creative work.

[0018] Figure 1 This is a schematic structural diagram of a fume treatment device for prebaked anode calcination for electrolytic aluminum in one embodiment of the present disclosure; Figure 2 for Figure 1 A magnified schematic diagram of point A; Figure 3 for Figure 1 A schematic diagram of the structure of the anode tube in the embodiment of FIG. Figure 4 for Figure 1 A schematic structural diagram of the second gear in the embodiment of FIG. Figure 5 for Figure 1 A schematic structural diagram of an elastic member in an embodiment of the present invention; Figure 6 for Figure 1 A schematic diagram of the structure of the installation disk in the embodiment of FIG. Figure 7 for Figure 6 An enlarged schematic diagram of point B; Figure 8 for Figure 1 A schematic diagram of a partial explosion in an embodiment of the present invention; Fig. 9 for Figure 1 A schematic diagram of the structure of the two upper mounting frames in the embodiment; Fig.10 This is a schematic diagram of the flue gas treatment process in another embodiment of the present disclosure.

[0019] In the figure: 1. main body, 11. accommodating space, 12. air inlet, 13. air outlet, 2. anode tube, 3. cathode wire, 4. spray part, 5. rotating plate, 52. water containing chamber, 53. guide part, 14. shell, 61. upper mounting frame, 62. lower mounting frame, 7. mounting column, 54. inner gear ring, 8. mounting plate, 9. first gear, 10. second mounting frame, 110. wind wheel, 120. rotating shaft, 130. rotating plate, 131. outer gear ring, 140. second gear, 150. connecting rod, 121. spiral groove, 132. protrusion, 160. elastic part, 17. denitrification part, 18. desulfurization tower, 19. desulfurization tower. DETAILED DESCRIPTION

[0020] The present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure.

[0021] In order to simplify the drawings, only the parts related to the disclosure are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0022] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0023] In the present disclosure, unless otherwise expressly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0025] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] Example 1 like Figure 1~Figure 3 As shown, it shows a prebaked anode calcining flue gas treatment device for electrolytic aluminum in an embodiment of the present disclosure, including a main body 1, the main body 1 has a accommodating space 11, the accommodating space 11 has an air inlet 12 and an air outlet 13; there are a plurality of anode tubes 2, which are arranged in sequence in the accommodating space 11, and the flue gas passes through the air inlet 12, the anode tube 2 and the air outlet 13 in sequence; each anode tube 2 is penetrated by a cathode wire 3, and the cathode wire 3 can absorb impurities in the flue gas to the inner wall of the anode tube 2 after power is turned on; a spray part 4 is arranged in the accommodating space 11 and is located above the accommodating space 11, and the spray part 4 is used for spraying water to clean the anode tube 2; there are a plurality of rotating pieces 5, and a rotating piece 5 is rotatably arranged in each anode tube 2, and the rotating piece 5 can rotate relative to the anode tube 2 so that the spray water on its upper end surface is thrown toward the inner wall of the anode tube 2.

[0027] For example, Figures 1 to 3 As shown, the main body 1 has a storage space 11, and is provided with an air inlet 12 and an air outlet 13. Several anode tubes 2 are arranged in sequence and installed in the storage space 11 to ensure that the smoke can pass through the air inlet 12, the anode tube 2 and the air outlet 13 in sequence. A cathode wire 3 is passed through each anode tube 2. When the power is turned on, an electric field is formed around the cathode wire 3, and impurities in the smoke are adsorbed onto the inner wall of the anode tube 2 under the action of the electric field. A spray part 4 is installed above the storage space 11. When the anode tube 2 needs to be cleaned, the spray part 4 is started regularly to spray water.

[0028] When the anode tube 2 is cleaned in the prior art, a large amount of water is mainly sprayed by the spraying part 4, so that the spraying water flows into the anode tube 2, flows through the inner wall of the anode tube 2, and washes down the impurities on the inner wall of the anode tube 2. In order to save water resources and improve the cleaning efficiency, the present invention rotatably sets a rotating piece 5 in each anode tube 2. The diameter of the rotating piece 5 is smaller than the diameter of the internal cavity of the anode tube 2, so as to ensure that the water flow can flow through the inner wall of the anode tube 2 after the rotating piece 5 rotates, and prevent the anode tube 2 from being blocked by the rotating piece 5. In order to enhance the effect of the rotating piece 5 and spray the spraying water to the inner wall of the anode tube 2 as much as possible, the present invention rotates the rotating piece 5, and throws the spraying water received by the upper end surface of the rotating piece 5 to the inner wall of the anode tube 2, so as to enhance the cleaning effect. The arrangement of the spraying part 4 and the rotating piece 5 can clean the anode tube 2 regularly, prevent impurities from accumulating on the inner wall of the anode tube 2, ensure the long-term stable operation of the device, and extend the service life of the device.

[0029] In some examples, the upper end surface of the rotating piece 5 has a water containing cavity 52, and the lower end surface of the rotating piece 5 has a guide member 53, the guide member 53 has a guide surface 531 extending outward and downward in an arc shape to guide water flow to the inner wall of the anode tube 2, and the rotating piece 5 is provided with a guide hole that is connected to the water containing cavity 52 and is used to guide water flow to the guide member.

[0030] For example, Figure 4 As shown, a water containing cavity 52 is provided on the upper end surface of the rotating piece 5. A guide member 53 is installed on the lower end surface of the rotating piece 5, so that one end of the guide member 53 is connected to the water containing cavity 52, and the other end leads to the inner wall of the anode tube 2. When the spraying member 4 sprays water, the water flows into the water containing cavity 52. ​​After the rotating piece 5 rotates, the water in the water containing cavity 52 flows to the inner wall of the anode tube 2 through the guide member 53 under the action of centrifugal force.

[0031] The water chamber 52 allows the spray water to be thrown toward the inner wall of the anode tube 2 through the guide hole and the guide surface, and the guide surface 531 ensures that there is enough water to clean the inner wall of the anode tube 2. The guide member 53 can accurately guide the water to the inner wall of the anode tube 2, making the cleaning more comprehensive and thorough.

[0032] In some examples, the air inlet 12 and the air outlet 13 are both located on the shell 14; a accommodating space 11 is formed inside the shell 14; an upper mounting frame 61 is arranged in the accommodating space 11; a lower mounting frame 62 is arranged in the accommodating space 11 and is correspondingly located below the upper mounting frame 61, and the anode tube 2 is arranged between the upper mounting frame 61 and the lower mounting frame 62 along the up and down directions; there are a plurality of mounting columns 7, and a plurality of mounting columns 7 are arranged horizontally on the upper mounting frame 61 and the lower mounting frame 62, one end of the cathode line 3 is arranged on a mounting column 7 of the upper mounting frame 61, and the other end is arranged on a mounting column 7 of the lower mounting frame 62, and a plurality of cathode lines 3 are arranged vertically on each mounting column 7.

[0033] For example, Figure 3 , Fig. 9 As shown, a housing 14 is provided with a receiving space 11, an air inlet 12 and an air outlet 13. An upper mounting frame 61 is arranged in the receiving space 11; a lower mounting frame 62 is arranged in the receiving space 11, the upper mounting frame 61 and the lower mounting frame 62 are arranged at intervals in the vertical direction, and the anode tube 2 is located between the upper mounting frame 61 and the lower mounting frame 62; there are a plurality of mounting posts 7, and a plurality of mounting posts 7 are arranged transversely on the upper mounting frame 61 and the lower mounting frame 62, and the length direction of the mounting posts 7 is arranged longitudinally, one end of the cathode line 3 is arranged on a mounting post 7 of the upper mounting frame 61, and the other end is arranged on a mounting post 7 of the lower mounting frame 62, and a plurality of cathode lines 3 are arranged longitudinally on each mounting post 7.

[0034] The arrangement of the upper mounting frame 61 and the mounting column 7 provides a mounting structure for the anode tube 2 and the cathode wire 3, ensuring the structural stability of the device. The horizontally arranged mounting columns 7 and the longitudinally arranged cathode wires 3 form a reasonable layout, and the reasonable mounting layout enables the anode tube 2 and the cathode wire 3 to be arranged in an orderly manner, which is conducive to the uniform passage of flue gas and improves the adsorption efficiency of the electric field on impurities.

[0035] In some examples, the rotating plate 5 has an inner gear ring 54, the mounting disk 8 is located in the anode tube 2 and is connected to the second mounting frame 10, the rotating plate 5 is rotatably arranged below the outer periphery of the mounting disk 8, and the rotating plate 5 and the mounting disk 8 are coaxially arranged; the first gear 9 is eccentrically rotatably arranged on the mounting disk 8, and the first gear 9 is engaged with the inner gear ring 54 to drive the rotating plate 5 to rotate.

[0036] For example, Figure 8 As shown, the cathode wire 3 passes through the mounting plate 8 and the rotating plate 5. An inner gear ring 54 is provided on the inner wall of the rotating plate 5, and the upper end surface of the rotating plate 5 and the mounting plate 8 form a water containing cavity 52, so as to ensure that the rotating plate 5 can rotate along the axis of the mounting plate 8 and prevent the spray water from flowing out of the through hole in the center of the rotating plate 5. The first gear 9 is eccentrically arranged on the mounting plate 8 and meshes with the inner gear ring 54. When the first gear 9 rotates, the rotating plate 5 is driven to rotate by meshing with the inner gear ring 54.

[0037] The mounting plate 8 provides a rotation support for the rotating plate 5, ensuring that the rotating plate 5 can rotate stably. The meshing transmission mode of the first gear 9 and the inner gear ring 54 enables the rotating plate 5 to throw the spray water toward the inner wall of the anode tube 2 more efficiently, thereby improving the cleaning effect.

[0038] It should be noted that the mounting plate 8 is an I-shaped block. The structure of the mounting plate 8 can prevent the first gear 9 from being separated from the rotating plate 5, and can form a water containing chamber 52 with the rotating block to ensure the cleaning efficiency. The rotating plate 5 does not need a high rotation speed to transport the spray water to the inner wall of the anode tube 2.

[0039] In some examples, the second mounting frame 10 is disposed on the upper mounting frame 61, the second mounting frame 10 is a hollow structure, and the second mounting frame 10 is used to pass gas; the wind wheel 110 is rotatably disposed in the second mounting frame 10, and the wind wheel 110 can rotate driven by the gas; the rotating shaft 120 is rotatably disposed on the second mounting frame 10, and one end of the rotating shaft 120 is disposed on the wind wheel 110; the turntable 130 is disposed on the other end of the rotating shaft 120 and is located outside the second mounting frame 10, and the outer wall of the turntable 130 has an outer gear ring 131; the second gear 140 is meshed with the outer gear ring 131; the connecting rod 150 is connected between the first gear 9 and the second gear 140, and is used to drive the first gear 9 to rotate under the action of the second gear 140.

[0040] For example, Figure 3 , Figure 6 As shown, the second mounting frame 10 is installed on the upper mounting frame 61, and is set as a hollow structure for passing gas. The wind wheel 110 is rotatably set in the second mounting frame 10. When the gas passes into the second mounting frame 10, the wind wheel 110 is driven to rotate. The rotating shaft 120 is rotatably set on the second mounting frame 10, one end of which is connected to the wind wheel 110, and the other end is installed with a turntable 130. The turntable 130 is located outside the second mounting frame 10. Several mounting shells are designed on the second mounting frame 10. The turntable 130 is installed in the shell, and the mounting shell provides conditions for the installation of the second gear 140. An outer gear ring 131 is set on the outer wall of the turntable 130, and a second gear 140 meshing with the outer gear ring 131 is installed. The second gear rotates on the mounting shell.

[0041] The first gear 9 and the second gear 140 are connected by a connecting rod 150, and the connecting rod 150 passes through the mounting shell and rotates on the rotating shell. When the wind wheel 110 rotates, the rotating disk 130 is driven to rotate through the rotating shaft 120, thereby rotating the second gear 140, and then the first gear 9 is driven to rotate through the connecting rod 150, and finally the rotating piece 5 is rotated. The mounting plate 8 is connected to the second mounting frame 10 through the first gear 9, the connecting rod 150, the second gear 140 and the rotating plate 130.

[0042] The wind wheel 110 is driven by gas to rotate, providing power for the rotation of the rotating piece 5, without the need for excessive additional electric drive, thereby reducing energy consumption and operating costs. Through a series of gear transmission structures, the rotation of the wind wheel 110 can be transmitted to the rotating piece 5, achieving effective transmission and conversion of power and ensuring the normal rotation of the rotating piece 5. It should be noted that the mounting shell can prevent the connecting rod 150 from deviating, and the rotating shaft 120 and the second mounting frame 10 are rotationally sealed.

[0043] In some examples, the rotating sheet 5 is lifted and lowered in the anode tube 2 , and the rotating disk 130 is lifted and lowered on the rotating shaft 120 .

[0044] For example, Figure 6 As shown, in order to prevent the rotating piece 5 from being always in the anode tube 2, resulting in poor exhaust of the anode tube 2, the present invention enables the rotating piece 5 to be raised and lowered in the anode tube 2. For example, when cleaning the anode tube 2, the rotating piece 5 is lowered into the anode tube 2, and when purifying the flue gas, the rotating piece 5 is raised out of the anode tube 2.

[0045] In some examples, the rotating shaft 120 has a spiral groove 121, and the inner wall of the rotating disk 130 has a protrusion 132 that slidably cooperates with 121. The rotating disk 130 can descend under the cooperation of the protrusion 132 and the spiral groove 121, and after descending, it drives the rotating sheet 5 to extend into the anode tube 2.

[0046] For example, Figure 7 As shown, a spiral groove 121 is processed on the surface of the rotating shaft 120, and a protrusion 132 is provided on the inner wall of the rotating disk 130. When the rotating shaft 120 rotates, the protrusion 132 slides along the spiral groove 121, thereby driving the rotating disk 130 to descend along the rotating shaft 120. For example: when it is necessary to clean the inner wall of the anode tube 2, ventilation is firstly conducted into the second mounting frame 10, and the wind wheel 110 is started to rotate the wind wheel 110 first. After the wind wheel 110 rotates, it drives the rotating shaft 120 to rotate. Due to the cooperation between the spiral groove 121 and the protrusion 132, after the rotating shaft 120 rotates, the protrusion 132 is first driven to slide along the spiral groove 121 through the spiral groove 121. After the protrusion 132 slides, when the rotating disk 130 descends to the lowest point of the spiral groove 121, the upper end face and the lower end face of the rotating disk 130 are both provided with extended edges. The side profile of the rotating disk 130 is an I-shaped. The second gear 140 is driven to descend by the extended edge, and the second gear 140 drives the rotating piece 5 to descend through the connecting rod 150 and the mounting plate 8. After the rotating piece 5 descends, it extends into the anode tube 2, and the rotating shaft 120 continues to rotate, driving the rotating disk 130 to rotate continuously, thereby driving the rotating piece 5 to rotate continuously. During the continuous rotation, the rotating piece 5 cannot continue to descend. After the rotating piece 5 rotates continuously, the spray water can be continuously sprayed onto the inner wall of the anode tube 2. Compared with the traditional direct spraying method, the spraying time of this structure during the cleaning process is shorter, thereby saving more water.

[0047] By using the cooperation of the spiral groove 121 and the protrusion 132, the rotational motion of the rotating shaft 120 is converted into the descending motion of the rotating disk 130, the structure is simple, and the automatic transition from the descending motion to the rotating motion is realized. No additional control mechanism is required, and only the wind wheel 110 is used to drive the rotating shaft 120 to rotate, driving the descending and rotating of the rotating piece 5, which not only reduces the water consumption during the equipment dust cleaning process, but also prevents the rotating piece 5 from staying inside the anode tube 2 during the equipment purifying the flue gas, thereby affecting the discharge of the flue gas.

[0048] In some examples, one end of the elastic member 160 is disposed on the turntable 130 , and the other end is disposed on the second mounting bracket 10 , and the elastic member 160 elastically pushes the turntable 130 upward.

[0049] For example, Figure 5 As shown, one end of the elastic member 160 is mounted on the rotating disk 130, and the other end is mounted on the second mounting frame 10. When the rotating disk 130 descends, the elastic member 160 is compressed; when the wind wheel 110 stops rotating, the elastic member 160 is reset, driving the rotating disk 130 to rotate in the opposite direction and rise, thereby lifting the rotating sheet 5 out of the anode tube 2.

[0050] The setting of the elastic member 160 can assist the turntable 130 in rising, reduce the demand for external power, and reduce energy consumption. The elastic member 160 can also play a role of buffering and stabilization, preventing the turntable 130 from shaking violently during the lifting process, and ensuring the stable operation of the device. After the turntable 130 rises, it drives the rotating piece 5 to extend out of the anode tube 2, preventing the rotating piece 2 from blocking the anode tube 2 and affecting the exhaust of smoke in the anode tube 2.

[0051] In some examples, the desulfurization tower 18 is connected to the air outlet of the denitrification component 17, and is used to receive the denitrified flue gas in the denitrification component 17. The desulfurization tower 18 is connected to the air inlet 12; the denitrification tower 19 is connected to the air outlet 13, and the denitrification tower 19 is used to receive the gas in the air outlet 13 and reduce the humidity of the flue gas.

[0052] For example, Fig.10 As shown, the arrangement of the denitrification unit 17, the desulfurization tower 18 and the denitrification tower 19 realizes multi-stage treatment of flue gas, which can effectively remove pollutants such as nitrogen oxides and sulfur oxides in the flue gas and reduce the humidity of the flue gas. Multi-stage treatment can improve the purification degree of flue gas, make the discharged flue gas more environmentally friendly, and reduce pollution to the environment.

[0053] Example 2 like Figure 1 , Figure 6 and Fig.10 As shown, it shows a treatment method of a treatment device for treating prebaked anode calcining flue gas for electrolytic aluminum in another embodiment of the present disclosure, comprising the following steps: S1, passing the flue gas into the denitrification element 17 for denitrification; S2, passing the denitrified flue gas into a desulfurization tower 18 for desulfurization; S3, the flue gas after denitration is introduced into the air inlet 12, and after the cathode line 3 is energized, an electric field is formed between the cathode line 3 and the anode tube 2, and the electric field adsorbs impurities to the inner wall of the anode tube 2; S3, start the spraying part 4, introduce gas to drive the wind wheel 110 to rotate, and then control the rotating piece 5 to descend and rotate in the anode tube 2; S4. The flue gas after impurity removal is passed into the de-whitening tower 19, and the flue gas temperature is reduced to below the dew point, so that the water vapor is condensed into liquid water for separation.

[0054] For example, Figures 1 to 9As shown, the original flue gas generated by the calcination of the pre-baked anode is denitrated by the denitrification unit 17. The denitrification unit 17 uses a suitable denitrification process to convert nitrogen oxides in the flue gas into harmless nitrogen and water. The reaction temperature, catalyst dosage (if the SCR process is used), and reducing agent injection amount in the denitrification process are controlled to ensure that the denitrification efficiency is optimal.

[0055] The flue gas after denitration treatment is transported to the desulfurization tower 18 for desulfurization treatment. Alkaline absorbent, such as limestone slurry in the limestone-gypsum method, is used in the desulfurization tower 18 to chemically react with sulfur dioxide in the flue gas to convert it into calcium sulfite or calcium sulfate precipitation. The operating parameters of the desulfurization tower 18, such as liquid-gas ratio, absorbent concentration and residence time, are optimized to improve the desulfurization efficiency. At the same time, the slurry in the desulfurization tower 18 is regularly monitored and treated to ensure its composition and performance stability.

[0056] The flue gas after denitration and desulfurization treatment enters the accommodation space 11 through the air inlet 12 of the main body 1. A plurality of anode tubes 2 are arranged in sequence in the accommodation space 11, and a cathode line 3 is inserted in each anode tube 2. The cathode line 3 is energized to form a strong electric field around the cathode line 3. Impurities in the flue gas are ionized under the action of the electric field force and adsorbed onto the inner wall of the anode tube 2, thereby further removing solid impurities in the flue gas.

[0057] The spraying member 4 located above the accommodating space 11 is started regularly to spray water to the anode tube 2. The spraying water first falls into the water containing cavity 52 of the rotating piece 5. One end of the guide member 53 on the lower end surface of the rotating piece 5 is connected to the water containing cavity 52, and the other end leads to the inner wall of the anode tube 2.

[0058] The wind wheel 110 is driven to rotate by the gas entering the second mounting frame 10, and the wind wheel 110 drives the rotating disk 130 to rotate through the rotating shaft 120. The outer gear ring 131 on the outer wall of the rotating disk 130 meshes with the second gear 140, and the second gear 140 drives the first gear 9 to rotate through the connecting rod 150. The first gear 9 meshes with the inner gear ring 54 on the inner wall of the rotating plate 5, thereby driving the rotating plate 5 to rotate. When the rotating plate 5 rotates, the spray water in the water chamber 52 is thrown toward the inner wall of the anode tube 2 through the guide member 53 to clean the impurities adsorbed on the inner wall of the anode tube 2.

[0059] The rotation speed and spraying time of the rotating sheet 5 are controlled to ensure that the inner wall of the anode tube 2 is fully cleaned. At the same time, the rotating sheet 5 and the rotating disk 130 can be lifted and lowered as needed to adjust different working states (cleaning state or impurity removal state) to improve work efficiency.

[0060] The flue gas after electric field adsorption and anode tube 2 cleaning is discharged from the outlet 13 of the main body 1 and enters the dehumidification tower 19. The dehumidification tower 19 adopts a suitable dehumidification process, such as condensation dehumidification or adsorption dehumidification, to reduce the humidity of the flue gas so that the treated flue gas meets the emission standards before being discharged. Efficient purification: Through multi-stage treatment processes such as denitrification, desulfurization, electric field adsorption of impurities and dehumidification, pollutants such as nitrogen oxides, sulfur oxides and solid impurities in the flue gas can be effectively removed to reduce pollution to the environment.

[0061] This treatment method achieves the following beneficial effects: The present disclosure is provided with cleaning devices such as a spraying member 4 and a rotating sheet 5, which can effectively clean the anode tube 2 regularly, prevent the accumulation of impurities from causing equipment blockage and damage, and extend the service life of the equipment. The design of the rotating sheet 5 reduces the cleaning time and cleaning water source, and uses gas to drive the wind wheel 110 to rotate to provide power for the rotating sheet 5, without the need for additional excessive electric drive, and synchronously drives several rotating sheets 5 to move.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, which should be included in the scope of the claims of the present disclosure.

Claims

1. A flue gas treatment device for prebaked anode calcination for electrolytic aluminum, characterized in that: include: A main body (1), the main body (1) having a containing space (11), the containing space (11) having an air inlet (12) and an air outlet (13); Anode tubes (2), wherein the anode tubes (2) are provided in a plurality and arranged in sequence in the accommodation space (11); smoke passes through the air inlet (12), the anode tubes (2) and the air outlet (13) in sequence; Each of the anode tubes (2) is provided with a cathode wire (3), and the cathode wire (3) is capable of absorbing impurities in the flue gas onto the inner wall of the anode tube (2) after being energized; a spraying member (4), the spraying member (4) being arranged in the accommodating space (11) and located above the accommodating space (11), the spraying member (4) being used for spraying water to clean the anode tube (2); A rotating plate (5), wherein the rotating plates (5) are in plurality, and one rotating plate (5) is rotatably arranged in each anode tube (2); the rotating plate (5) can rotate relative to the anode tube (2) so that the spray water is thrown toward the inner wall of the anode tube (2).

2. The device for treating flue gas from calcining prebaked anodes for electrolytic aluminum according to claim 1, characterized in that: The upper end surface of the rotating plate (5) has a water-containing cavity (52), the lower end surface of the rotating plate (5) has a guide member (53), the guide member (53) has a guide surface (531) extending outward and downward to guide water flow to the inner wall of the anode tube (2), and the rotating plate (5) is provided with a guide hole which is in communication with the water-containing cavity (52) and is used to guide water flow to the guide member (53).

3. The device for treating flue gas from calcining prebaked anodes for electrolytic aluminum according to claim 2, characterized in that: The main body (1) comprises: A shell (14), the air inlet (12) and the air outlet (13) are both located on the shell (14), and the interior of the shell (14) forms the accommodating space (11); an upper mounting frame (61), the upper mounting frame (61) being arranged in the accommodating space (11); a lower mounting frame (62), the lower mounting frame (62) being arranged in the accommodating space (11) and correspondingly located below the upper mounting frame (61), the anode tube (2) being arranged between the upper mounting frame (61) and the lower mounting frame (62) along a vertical direction; A plurality of mounting posts (7) are provided, and the upper mounting frame (61) and the lower mounting frame (62) are each provided with a plurality of mounting posts (7) arranged transversely, one end of the cathode line (3) is arranged on a mounting post (7) of the upper mounting frame (61), and the other end is arranged on a mounting post (7) of the lower mounting frame (62), and each mounting post (7) is provided with a plurality of cathode lines (3) arranged longitudinally.

4. The device for treating flue gas from calcining prebaked anodes for electrolytic aluminum according to claim 3, characterized in that: The rotating plate (5) has an inner gear ring (54) and further comprises: a mounting plate (8), the mounting plate (8) being located inside the anode tube (2), the rotating plate (5) being rotatably disposed on the mounting plate (8), the rotating plate (5) being coaxially disposed with the mounting plate (8); A first gear (9), the first gear (9) being eccentrically rotatably arranged on the mounting plate (8), the first gear (9) being meshed with the inner gear ring (54) and being used to drive the rotating plate (5) to rotate.

5. The device for treating flue gas from calcining prebaked anodes for electrolytic aluminum according to claim 4, characterized in that: Also includes: a second mounting frame (10), the second mounting frame (10) being arranged on the upper mounting frame (61), the second mounting frame (10) being a hollow structure, and the second mounting frame (10) being used for passing gas; a wind wheel (110), the wind wheel (110) being rotatably disposed in the second mounting frame (10), and the wind wheel (110) being capable of rotating under the drive of gas; a rotating shaft (120), the rotating shaft (120) being rotatably mounted on the second mounting frame (10), and one end of the rotating shaft (120) being mounted on the wind wheel (110); a rotating disk (130), the rotating disk (130) being arranged on the other end of the rotating shaft (120) and being located outside the second mounting frame (10), the rotating disk (130) having an outer gear ring (131); a second gear (140), the second gear (140) being meshed with the outer gear ring (131); A connecting rod (150), the connecting rod (150) being connected between the first gear (9) and the second gear (140), and being used for driving the first gear (9) to rotate under the action of the second gear (140).

6. The device for treating flue gas from calcining prebaked anodes for electrolytic aluminum according to claim 5, characterized in that: The rotating plate (5) is arranged in the anode tube (2) in a lifting manner, and the rotating disk (130) is arranged in a lifting manner on the rotating shaft (120).

7. The device for treating flue gas from calcining prebaked anodes for electrolytic aluminum according to claim 5, characterized in that: The rotating shaft (120) has a spiral groove (121), and the inner wall of the rotating disk (130) has a protrusion (132) that is aligned with the spiral groove (121). The rotating disk (130) can descend under the cooperation of the protrusion (132) and the spiral groove (121), and after descending, it is used to drive the rotating sheet (5) to extend into the anode tube (2).

8. The device for treating flue gas from calcining prebaked anodes for electrolytic aluminum according to claim 5, characterized in that: Also includes: An elastic member (160), one end of the elastic member (160) being arranged on the rotating disk (130) and the other end being arranged on the second mounting frame (10), the elastic member (160) being used to elastically push the rotating disk (130) upwards.

9. The device for treating flue gas from calcining prebaked anodes for electrolytic aluminum according to claim 1, characterized in that: Also includes: Denitrification parts (17); a desulfurization tower (18), connected to the gas outlet end of the denitration element (17) and used to receive the denitration flue gas in the denitration element (17); the desulfurization tower (18) is connected to the gas inlet (12); A de-whitening tower (19) is connected to the gas outlet (13), and the de-whitening tower (19) is used to receive the smoke from the gas outlet (13) and reduce the humidity of the smoke.

10. A method for treating flue gas from calcining prebaked anodes for aluminum electrolysis, using a device for treating flue gas from calcining prebaked anodes for aluminum electrolysis as claimed in any one of claims 1 to 9, characterized in that: The processing method of the processing device comprises the following steps: S1, passing the flue gas into a denitrification unit (17) for denitrification; S2, passing the denitrified flue gas into a desulfurization tower (18) for desulfurization; S3, passing the desulfurized flue gas into the air inlet (12), and after the cathode wire (3) is energized, an electric field is formed between the cathode wire (3) and the anode tube (2), and the electric field adsorbs impurities to the inner wall of the anode tube (2); S3, starting the spraying element (4), introducing gas to drive the wind wheel (110) to rotate, thereby controlling the rotating plate (5) to descend and rotate inside the anode tube (2); S4. The flue gas after impurities removal is passed into the de-whitening tower (19), the flue gas temperature is lowered to below the dew point, and the water vapor is condensed into liquid water for separation.

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