Continuous Graphitization Furnace Flue Gas Heat Energy Recovery Device for Sustainable CS2 Collection

Abstract

The present invention relates to the field of flue gas heat energy recovery, and particularly to a continuous graphitization furnace flue gas heat energy recovery device for sustainable collection of CS2, which includes a main flue pipe and a secondary flue pipe connected thereto. There are symmetric heat exchange racks arranged vertically inside the main flue pipe, on which there are a water inlet pipe and a water outlet pipe. There are two liquid storage cylinders inside the secondary flue pipe, and a cavity for storing the solution is formed between the outer wall thereof and the inner wall of the secondary flue pipe. A first liquid injection pipe is provided at the air inlet end of the secondary flue pipe, and symmetric water pumps are installed on the outside of the secondary flue pipe. The present invention first adopts a two-stage heat exchange design to fully recover the heat energy in the flue gas and improve the energy utilization efficiency, and then through a four-pass absorption process to ensure that the harmful substances in the flue gas are fully removed to meet the environmental protection emission standards. During this period, the mixed liquid is recycled multiple times, reducing resource waste and lowering the operation cost.

Description

Technical Field

[0001] The present invention relates to the field of flue gas heat energy recovery, and particularly to a continuous graphitization furnace flue gas heat energy recovery device for sustainable collection of CS2. Background Art

[0002] A continuous graphitization furnace is a device used for high-temperature treatment of carbon-based materials (such as petroleum coke, pitch coke, etc.). By continuously heating (usually above 2800°C), its crystal structure is transformed into a graphitized material, which is widely used in the production of high-performance materials such as lithium battery anode materials, graphite electrodes, and nuclear reactor moderators. During the graphitization process, a large amount of high-temperature flue gas is generated. This flue gas not only contains a large amount of heat energy but may also contain harmful gases such as carbon disulfide (CS2), sulfur dioxide (SO2), and nitrogen oxides (NO X ) etc.

[0003] Traditional flue gas treatment methods usually combine heat energy recovery and flue gas purification to reduce energy waste and environmental pollution. The flue gas is treated by means of cooling, dust removal, and chemical absorption. Among them, an alkaline solution (such as sodium carbonate or calcium hydroxide solution) is used to absorb acidic gases (including CS2) in the flue gas to form soluble salts, thereby reducing environmental pollution and improving resource utilization efficiency. However, the existing technologies have the following problems: Spraying the alkaline solution once often cannot completely remove the acidic gas, and multiple sprays are required to ensure the absorption effect; frequent spraying will lead to a large consumption of the alkaline solution, increasing the operating cost; the generated mixed waste liquid (containing alkaline substances and acidic substances) needs to be further treated to meet the environmental protection discharge standards or recover valuable components therein. As the amount of waste liquid increases, the cost and complexity of subsequent treatment will also increase significantly.

[0004] Based on the above situation, the present invention proposes a continuous graphitization furnace flue gas heat energy recovery device for sustainable collection of CS2. Summary of the Invention

[0005] In order to overcome the disadvantages of low absorption efficiency, resource waste, and complex waste liquid treatment in the prior art, the present invention provides a continuous graphitization furnace flue gas heat energy recovery device for sustainable collection of CS2.

[0006] A continuous graphitization furnace flue gas heat energy recovery device for sustainable collection of CS2 includes a main flue pipe and a secondary flue pipe connected thereto. There are symmetric heat exchange racks up and down inside the main flue pipe, on which there are a water inlet pipe and a water outlet pipe. There are two liquid storage cylinders inside the secondary flue pipe, and a cavity for storing the solution is formed between its outer wall and the inner wall of the secondary flue pipe. A first liquid injection pipe is provided at the air inlet end of the secondary flue pipe. Symmetric water pumps are installed on the outside of the secondary flue pipe, and their suction ports are both located in the adjacent cavity, and their discharge ports are both connected to a second liquid injection pipe. Sprayers are installed at the liquid outlet ends of the first liquid injection pipe and the second liquid injection pipe.

[0007] Optionally, both the top and bottom sides of the liquid storage cylinder are open, and its top port is conical.

[0008] Optionally, a thick pipe section for containing the mixed waste liquid is provided at the bottom of the secondary smoke pipe near the exhaust pipe, and a liquid guide groove is provided on the secondary smoke pipe near the thick pipe section.

[0009] Optionally, an electrochemical sensor is installed at the thick pipe section near the exhaust pipe.

[0010] Optionally, sliding cylinders are fixedly connected to the outer walls of both liquid storage cylinders. A magnetic floating frame is slidably connected inside the sliding cylinders. A third liquid injection pipe is connected to the first liquid injection pipe, and its liquid outlet ports symmetrically arranged up and down are located in the cavity between the inner walls of the liquid storage cylinder and the secondary smoke pipe. An electromagnet is provided on the inner side of the top wall of the sliding cylinder, and the position of the magnetic floating frame is controlled by energizing or de-energizing to optimize the solution storage and discharge process.

[0011] Optionally, a sliding frame is provided inside the thick pipe section of the secondary smoke pipe. Symmetrically distributed second springs are connected between the sliding frame and the secondary smoke pipe. The symmetrically distributed second springs are all wound around the sliding frame. A large round hole is opened on the bottom wall of the sliding frame. A blocking frame for controlling the opening and closing of the large round hole is slidably connected to the sliding frame. The blocking frame is arranged in a dome shape. Symmetrically distributed first springs are connected between the blocking frame and the sliding frame. The symmetrically distributed first springs are all wound around the blocking frame.

[0012] Optionally, an electromagnetic frame is provided inside the exhaust pipe of the secondary smoke pipe. A sliding magnetic block is slidably connected to the electromagnetic frame. The electromagnetic frame and the sliding magnetic block are both provided with uniformly distributed sector-shaped air holes, and the sector-shaped air holes of the two are arranged staggeredly. A tension spring is connected between the sliding magnetic block and the electromagnetic frame. The tension spring is wound around the electromagnetic frame. The sliding magnetic block is fixedly connected with a magnetic pushing frame. The magnetic pushing frame passes through the sliding frame. A clamping frame is fixedly connected to the blocking frame. A clamping block is fixedly connected to the side of the magnetic pushing frame close to the clamping frame.

[0013] Optionally, a bayonet is opened on the clamping frame for precise clamping connection with the clamping block on the magnetic pushing frame.

[0014] Optionally, the electrochemical sensor, the electromagnet, and the electromagnetic frame are electrically connected through a control module.

[0015] Optionally, a rotating frame is provided inside each spray head.

[0016] The beneficial effects of the present invention are as follows: First, through the two-stage heat exchange design, the heat energy in the flue gas is fully recovered, improving the energy utilization efficiency. Then, through the four-pass absorption process, it is ensured that the harmful substances in the flue gas are fully removed, meeting the environmental protection emission standards. During this period, the mixed liquid is recycled multiple times, reducing resource waste and lowering the operating cost.

[0017] Through the linkage control of the electrochemical sensor, the magnetic floating frame, and the electromagnetic frame, the present invention ensures that the flue gas is fully in contact with the mixed liquid, improving the removal effect of harmful substances.

[0018] In the present invention, the rotating frame drives the nozzle to rotate, converting the solution into a scattered water curtain, covering a larger area, thus having a larger contact area with the flue gas, accelerating the absorption rate of harmful substances, and improving the absorption efficiency of harmful substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic three-dimensional structure diagram of the present invention.

[0020] Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of components such as the main flue pipe, auxiliary flue pipe, and heat exchange frame of the present invention.

[0021] Figure 3 It is a schematic cross-sectional view of the three-dimensional structure of components such as the liquid storage cylinder, sliding cylinder, and magnetic floating frame of the present invention.

[0022] Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of components such as the sliding cylinder, magnetic floating frame, and electromagnet of the present invention.

[0023] Figure 5 It is a schematic cross-sectional view of the three-dimensional structure of components such as the sliding frame, blocking frame, and first spring of the present invention.

[0024] Figure 6 It is a separation diagram of the sliding frame and the blocking frame of the present invention.

[0025] Figure 7 It is a schematic cross-sectional view of the three-dimensional structure of components such as the electromagnetic frame, sliding magnetic block, and tension spring of the present invention.

[0026] Figure 8 It is a schematic cross-sectional view of the three-dimensional structure of components such as the magnetic pushing frame, main flue pipe nozzle, and clamping frame block of the present invention.

[0027] Figure 9 It is a schematic three-dimensional structure diagram of the clamping frame and the clamping block of the present invention.

[0028] Figure 10 It is a schematic three-dimensional structure diagram of the first liquid injection pipe, nozzle, and rotating frame of the present invention.

[0029] Reference numerals in the drawings: 1 - main flue pipe, 2 - auxiliary flue pipe, 3 - heat exchange frame, 4 - first liquid injection pipe, 5 - nozzle, 6 - liquid storage cylinder, 7 - water pump, 8 - second liquid injection pipe, 801 - liquid guide groove, 9 - electrochemical sensor, 10 - sliding cylinder, 11 - magnetic floating frame, 12 - third liquid injection pipe, 13 - electromagnet, 14 - sliding frame, 15 - blocking frame, 16 - first spring, 17 - second spring, 18 - electromagnetic frame, 19 - sliding magnetic block, 20 - tension spring, 21 - magnetic pushing frame, 22 - clamping frame, 23 - clamping block, 24 - rotating frame. DETAILED DESCRIPTION OF THE INVENTION

[0030] The following is only a preferred embodiment of the present invention, and does not limit the protection scope of the present invention accordingly.

[0031] Embodiment 1: A continuous graphitization furnace flue gas heat energy recovery device for continuously collecting CS2, as Figures 1 - 3 shown, includes a main flue pipe 1 and a secondary flue pipe 2 connected to its upper end. There are two heat exchange racks 3 symmetrically arranged up and down in the main flue pipe 1 for recovering the heat energy of the flue gas, and an inlet water pipe and an outlet water pipe are provided thereon. Inside the secondary flue pipe 2, two liquid storage cylinders 6 are arranged vertically. A cavity for storing the solution is formed between the outer wall and the inner wall of the secondary flue pipe 2. Both the top and bottom sides of the liquid storage cylinder 6 are open, and its top port is conical. At the inlet end of the secondary flue pipe 2, a first liquid injection pipe 4 is provided for spraying an alkaline solution to absorb harmful substances in the flue gas;

[0032] On the outside of the secondary flue pipe 2, water pumps 7 are symmetrically arranged up and down. Their suction ports are both located in the adjacent cavities, and their discharge ports are both connected to second liquid injection pipes 8 for pumping the mixed liquid in the cavities. At the liquid outlet of the first liquid injection pipe 4 and the second liquid injection pipe 8, spray heads 5 are installed for converting the solution into a scattered water curtain. At the bottom of the secondary flue pipe 2 near the exhaust pipe, there is a thick pipe section for containing the mixed waste liquid. A liquid guide groove 801 is provided on the secondary flue pipe 2 near the thick pipe section. An electrochemical sensor 9 is installed on the thick pipe section near the exhaust pipe for detecting the concentration of harmful substances in the flue gas.

[0033] As Figures 5 - 7 shown, a sliding rack 14 is provided in the thick pipe section of the secondary flue pipe 2. Symmetrically distributed second springs 17 are connected between the sliding rack 14 and the secondary flue pipe 2. The symmetrically distributed second springs 17 are all wound around the sliding rack 14 to form an elastic support structure. A large round hole is opened on the bottom wall of the sliding rack 14. A blocking rack 15 for controlling the opening and closing of the large round hole is slidably connected to the sliding rack 14. The blocking rack 15 is arranged in a dome shape. Symmetrically distributed first springs 16 are connected between the blocking rack 15 and the sliding rack 14. The symmetrically distributed first springs 16 are all wound around the blocking rack 15.

[0034] During use, first install the main flue pipe 1 on the outlet of the continuous graphitization furnace to ensure that the flue gas can smoothly enter the interior of the device. And the inlet water pipe of the heat exchange rack 3 is connected to an external water pipe, and the outlet water pipe is connected to the next-stage treatment equipment (such as a cooling tower or a heat exchanger) to form a closed-loop cooling system. And use appropriate clamps or connectors to firmly fix the alkaline solution output pipe on the inlet of the first liquid injection pipe 4 to ensure the stability and tightness of the solution transportation.

[0035] When the flue gas enters from the bottom of the main flue pipe 1, it first passes through the lower heat exchange rack 3. The lower heat exchange rack 3 will absorb a large amount of heat in the flue gas to achieve primary heat exchange, significantly reducing the temperature of the flue gas. The flue gas after primary heat exchange continues to rise and enters the upper heat exchange rack 3. The upper heat exchange rack 3 further absorbs the residual heat in the flue gas to complete secondary heat exchange, ensuring that the thermal energy in the flue gas is fully recovered.

[0036] Along the traveling route of the flue gas, the cooled flue gas will enter the secondary flue pipe 2 and is ready for harmful substance absorption treatment. The alkaline solution in the first liquid injection pipe 4 is sprayed out through the nozzle 5 in a conical shape and comes into full contact with the flue gas. The alkaline solution absorbs harmful substances (such as sulfur dioxide, nitrogen oxides, etc.) in the flue gas to form soluble salts. The absorbed mixed liquid flows into the cavity along the conical surface at the top of the liquid storage cylinder 6 to complete the first absorption. The water pump 7 in the upper part pumps out the first mixed liquid and sprays it again through the upper second liquid injection pipe 8 and its nozzle 5. The sprayed mixed liquid further absorbs harmful substances in the flue gas to form a second mixed liquid. The second mixed liquid continues to flow downward into the lower cavity to complete the second absorption. The water pump 7 in the lower part pumps out the second mixed liquid and sprays it again through the nozzle 5. The sprayed mixed liquid continues to absorb the remaining harmful substances in the flue gas to form a third mixed liquid. The third mixed liquid flows along the liquid guide groove 801 into the thick pipe section at the bottom of the secondary flue pipe 2 to complete the third absorption. Since the liquid guide groove 801 is higher than the inlet of the exhaust pipe of the secondary flue pipe 2, the third mixed liquid flows downward along the liquid guide groove 801 to form a water curtain. The flue gas after three times of absorption passes through the water curtain, and the water curtain further absorbs the remaining harmful substances in the flue gas. Finally, the treated flue gas is discharged from the exhaust pipe outlet to complete the fourth absorption.

[0037] In summary, first, through the two-stage heat exchange design, the thermal energy in the flue gas is fully recovered to improve the energy utilization efficiency. Then, through the four-stage absorption process, it is ensured that the harmful substances in the flue gas are fully removed to meet the environmental protection emission standards. During this period, the mixed liquid is recycled multiple times, reducing resource waste and lowering the operating cost.

[0038] As described above, the third mixed liquid flows into the thick pipe section at the bottom of the secondary flue pipe 2 and reaches the tray composed of the sliding rack 14 and the blocking rack 15. Under the gravity of the third mixed liquid, the tray composed of the sliding rack 14 and the blocking rack 15 is pressed downward, and the second spring 17 undergoes a slight deformation. When the amount of the third mixed liquid in the tray reaches a certain level, the mixed liquid presses the blocking rack 15 downward, causing the blocking rack 15 to slide downward relative to the sliding rack 14, and the first spring 16 deforms. The blocking rack 15 is separated from the sliding rack 14, and the third mixed liquid flows from the gap between the blocking rack 15 and the sliding rack 14 to the lower part of the thick pipe section. Since the blocking rack 15 is arranged in a dome shape, the third mixed liquid in the tray can quickly flow to the lower part of the thick pipe section.

[0039] When the quantity of the third mixed liquid in the tray decreases to a certain amount, under the elastic action of the first spring 16, the baffle 15 quickly moves upward and fits with the carriage 14 to re - form the tray. As the third mixed liquid continues to flow in, a certain amount of the mixed liquid accumulates in the tray again until the accumulated amount exceeds the elastic force of the first spring 16, and the baffle 15 slides downward again to separate from the carriage 14, discharging part of the mixed liquid. Through the above - mentioned cyclic process, the tray formed by the carriage 14 and the baffle 15 always accumulates a certain amount of the mixed liquid. When the flue gas enters the exhaust pipe from the thick pipe section, the flue gas will contact the mixed liquid accumulated on the tray, and the mixed liquid further absorbs harmful substances in the flue gas, completing the last purification process, improving the utilization rate of the alkaline solution and the removal effect of harmful substances in the flue gas.

[0040] Example 2: On the basis of Example 1, as Figure 3 and Figure 4 shown, the outer walls of both liquid storage cylinders 6 are fixedly connected with sliding cylinders 10. Magnetically - floating frames 11 are slidably connected in both sliding cylinders 10. A third liquid injection pipe 12 is connected to the first liquid injection pipe 4, and its liquid outlet ports symmetrically arranged up and down are located in the cavity between the liquid storage cylinder 6 and the inner wall of the auxiliary flue pipe 2, for evenly distributing the alkaline solution and improving the absorption efficiency of harmful substances. Inside the top wall of each sliding cylinder 10, an electromagnet 13 is provided to control the position of the magnetically - floating frame 11 by energizing or de - energizing, optimizing the solution storage and discharge process.

[0041] As Figures 7 - 9 shown, an electromagnetic frame 18 is provided in the exhaust pipe of the auxiliary flue pipe 2. A sliding magnetic block 19 is slidably connected to the lower part of the electromagnetic frame 18. The electromagnetic frame 18 and the sliding magnetic block 19 are both provided with evenly - distributed fan - shaped air holes, and the fan - shaped air holes of the two are arranged staggeredly. A tension spring 20 is connected between the sliding magnetic block 19 and the electromagnetic frame 18, and the tension spring 20 is wound around the electromagnetic frame 18. The sliding magnetic block 19 is fixedly connected with a magnetic pushing frame 21, and the magnetic pushing frame 21 passes through the carriage 14. A clamping frame 22 is fixedly connected to the baffle 15. A clamping block 23 is fixedly connected to the side of the magnetic pushing frame 21 close to the clamping frame 22. A clamping notch is provided on the clamping frame 22 for precise clamping with the clamping block 23 on the magnetic pushing frame 21. The electrochemical sensor 9 is electrically connected to the electromagnet 13 and the electromagnetic frame 18 through a control module.

[0042] When there is enough solution in the cavity, the magnetic floating frame 11 moves upward under the buoyancy force to seal the liquid outlet of the third liquid injection pipe 12. The external alkaline solution can only flow in through the first liquid injection pipe 4. When the electrochemical sensor 9 detects that the flue gas in the exhaust pipe still contains harmful substances, the electromagnet 13 and the electromagnetic frame 18 are controlled to be energized. The electromagnet 13 will generate magnetism, and the magnetic floating frame 11 is repelled by the magnetic force to move downward, opening the liquid outlet of the third liquid injection pipe 12. The external fresh alkaline solution is replenished into the cavity. The replenished alkaline solution makes the alkaline concentration of the mixed liquid pumped out by the water pump 7 higher, and the intensity of the harmful substances absorbed by the mixed liquid sprayed out by the second liquid injection pipe 8 is enhanced, improving the purification efficiency.

[0043] When the electromagnetic frame 18 is energized, it attracts the sliding magnetic block 19 to move upward, deforming the tension spring 20. The fan-shaped air holes of the electromagnetic frame 18 are staggered from the sliding magnetic block 19, sealing the exhaust pipe of the auxiliary flue pipe 2, and the flue gas cannot be discharged temporarily. The sliding magnetic block 19 drives the magnetic pushing frame 21 and the clamping block 23 to move upward. The clamping block 23 is clamped into the clamping frame 22, and the magnetic pushing frame 21 is buckled with the blocking frame 15, making the sliding frame 14 and the blocking frame 15 form a whole. More mixed liquid can be accumulated in the tray. The flue gas accumulates in the thick pipe section, and the contact time with the mixed liquid on the tray is extended, further absorbing trace harmful substances in the flue gas.

[0044] When the electrochemical sensor 9 does not detect harmful substances, the electromagnet 13 and the electromagnetic frame 18 are controlled to be de-energized. The magnetic floating frame 11 moves upward under the buoyancy force to seal the liquid outlet of the third liquid injection pipe 12. The electromagnetic frame 18 no longer attracts the sliding magnetic block 19. Under the action of the tension spring 20, the sliding magnetic block 19 moves downward to reset, and the exhaust pipe is unsealed. The flue gas can be discharged from the exhaust pipe. At the same time, the sliding magnetic block 19 drives the magnetic pushing frame 21 and the clamping block 23 to move downward to reset. The clamping block 23 disengages from the clamping frame 22, and the blocking frame 15 slides downward relative to the sliding frame 14. The mixed liquid in the tray flows out from the gap, and the blocking frame 15 moves upward to reset under the elastic action of the first spring 16. In summary, through the linkage control of the electrochemical sensor 9, the magnetic floating frame 11 and the electromagnetic frame 18, it is ensured that the flue gas is in full contact with the mixed liquid, improving the removal effect of harmful substances.

[0045] As Figure 10 shown, a rotating frame 24 is provided in each of the three nozzles 5, which can realize the multi-angle spraying of the nozzles 5, optimizing the distribution effect of the liquid or gas.

[0046] When the first liquid injection pipe 4 and the second liquid injection pipe 8 spray the solution through the nozzles 5, the solution will impact the fan blades (similar to a turbine) inside the rotating frame 24, converting the linear kinetic energy of the water flow into the rotational mechanical energy of the fan blades, driving the rotating frame 24 to rotate. The rotation of the rotating frame 24 directly drives the nozzles 5 to rotate synchronously. Thus, the rotating nozzles 5 can convert the solution into a scattered water curtain, covering a larger area, and thus having a larger contact area with the flue gas. The contact area between the scattered water curtain and the flue gas is significantly increased, accelerating the absorption speed of harmful substances and improving the absorption efficiency of harmful substances.

[0047] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A continuous graphitization furnace flue gas heat energy recovery device for sustainable CS2 collection, comprising a main flue pipe (1) and a secondary flue pipe (2) connected thereto, characterized in that: Inside the main smoke pipe (1), there are symmetric heat exchange racks (3) up and down, on which there are water inlet pipes and water outlet pipes. Inside the secondary smoke pipe (2), there are two liquid storage cylinders (6), and a cavity for storing solution is formed between its outer wall and the inner wall of the secondary smoke pipe (2). At the air inlet end of the secondary smoke pipe (2), there is a first liquid injection pipe (4). Symmetric water pumps (7) are installed on the outside of the secondary smoke pipe (2), and their suction ports are both located in the adjacent cavities, and their discharge ports are both connected to second liquid injection pipes (8). Spray heads (5) are installed at the liquid outlet ports of the first liquid injection pipe (4) and the second liquid injection pipe (8); at the bottom of the secondary smoke pipe (2) near the exhaust pipe, there is a thick pipe section for containing the mixed waste liquid, and a liquid guide groove (801) is provided on the secondary smoke pipe (2) near the thick pipe section; inside the thick pipe section of the secondary smoke pipe (2), there is a sliding rack (14), and symmetric second springs (17) are connected between the sliding rack (14) and the secondary smoke pipe (2). The symmetric second springs (17) are both wound around the sliding rack (14). A large round hole is opened on the bottom wall of the sliding rack (14). A blocking rack (15) for controlling the opening and closing of the large round hole is slidably connected to the sliding rack (14). The blocking rack (15) is arranged in a dome shape. Symmetric first springs (16) are connected between the blocking rack (15) and the sliding rack (14). The symmetric first springs (16) are both wound around the blocking rack (15).

2. The continuous graphitization furnace flue gas heat energy recovery device for sustainable CS2 collection according to claim 1, characterized in that: Both the top and bottom sides of the liquid storage cylinder (6) are open, and its top port is conical.

3. A continuous graphitization furnace flue gas heat energy recovery device for sustainable CS2 collection according to claim 2, characterized in that: An electrochemical sensor (9) is installed on the thick pipe section near the exhaust pipe.

4. A continuous graphitization furnace flue gas heat energy recovery device for sustainable CS2 collection according to claim 3, characterized in that: Sliding cylinders (10) are fixedly connected to the outer walls of the two liquid storage cylinders (6). A magnetic floating rack (11) is slidably connected inside the sliding cylinders (10). A third liquid injection pipe (12) is connected to the first liquid injection pipe (4), and its symmetric liquid outlet ports are located in the cavity between the liquid storage cylinder (6) and the inner wall of the secondary smoke pipe (2). An electromagnet (13) is provided on the inner side of the top wall of the sliding cylinder (10).

5. A continuous graphitization furnace flue gas heat energy recovery device for sustainable CS2 collection according to claim 4, characterized in that: An electromagnetic rack (18) is provided inside the exhaust pipe of the secondary smoke pipe (2). A sliding magnetic block (19) is slidably connected to the electromagnetic rack (18). The electromagnetic rack (18) and the sliding magnetic block (19) are both provided with uniformly distributed fan-shaped air holes, and the fan-shaped air holes of the two are arranged staggeredly. A tension spring (20) is connected between the sliding magnetic block (19) and the electromagnetic rack (18). The tension spring (20) is wound around the electromagnetic rack (18). The sliding magnetic block (19) is fixedly connected to a magnetic pushing rack (21). The magnetic pushing rack (21) passes through the sliding rack (14). A clamping rack (22) is fixedly connected to the blocking rack (15). A clamping block (23) is fixedly connected to the side of the magnetic pushing rack (21) close to the clamping rack (22).

6. A continuous graphitization furnace flue gas heat energy recovery device for sustainable CS2 collection according to claim 5, characterized in that: A clamping opening is opened on the clamping rack (22) for precise clamping with the clamping block (23) on the magnetic pushing rack (21).

7. A continuous graphitization furnace flue gas heat energy recovery device for sustainable CS2 collection according to claim 6, characterized in that: The electrochemical sensor (9) is electrically connected to the electromagnet (13) and the electromagnetic rack (18) through a control module.

8. A continuous graphitization furnace flue gas heat energy recovery device for sustainable collection of CS2 according to claim 7, characterized in that: A rotating rack (24) is provided inside each spray head (5).

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