A waste gas desulfurization and dust removal device and process for a high-temperature graphitization furnace

Abstract

The application discloses a waste gas desulfurization and dust removal device and process for a high-temperature graphitization furnace, relates to the technical field of waste gas desulfurization and dust removal of a high-temperature graphitization furnace, and comprises a desulfurization tower, a control panel is fixedly installed on the sidewall of the desulfurization tower, a smoke inlet pipe penetrates through and is fixedly connected to the sidewall of the desulfurization tower, a gas outlet pipe is fixedly communicated with the upper end of one side of the desulfurization tower, a storage box is placed on the inner bottom surface of the desulfurization tower, a discharge box door is arranged in correspondence with the storage box, and the discharge box door is movably installed on the sidewall of the desulfurization tower. The smoke inlet pipe is connected with a fan, the fan sends the high-temperature flue gas generated by the graphitization furnace into the smoke inlet pipe, meanwhile, the fan draws the normal-temperature air outside into the annular cavity, the normal-temperature air in the annular cavity exchanges heat with the high-temperature flue gas in the smoke inlet pipe, so that the temperature of the flue gas in the smoke inlet pipe is reduced, and the cyclone separator can avoid being subjected to high temperature for a long time, thereby prolonging the service life of the cyclone separator.

Description

Technical Field

[0001] This invention relates to the field of waste gas desulfurization and dust removal technology for high-temperature graphitization furnaces, specifically to a waste gas desulfurization and dust removal device and process for high-temperature graphitization furnaces. Background Technology

[0002] Graphitization furnaces are mainly used for the sintering and graphitization of carbon materials, graphitization of PI films, graphitization of thermal conductive materials, sintering of carbon fiber ropes, graphitization of carbon fiber filaments, purification of graphite powder, and high-temperature treatment of other materials that can be graphitized in a carbon environment. When the graphitization furnace is working, it generates a large amount of high-temperature exhaust gas, also known as pitch fumes. When the temperature of the flue gas generated during the operation of the graphitization furnace is higher than 260°C, the pitch fumes are easily decomposed to produce secondary carbon powder, which exacerbates the dust load. When the temperature is lower than 200°C, the pitch fumes instantly become viscous and coke, and they adhere to the pipe walls and dust removal components like glue to form hard coke blocks, which are difficult to remove.

[0003] Therefore, this invention proposes a waste gas desulfurization and dust removal device and process for high-temperature graphitization furnaces. Summary of the Invention

[0004] The purpose of this invention is to provide a desulfurization and dust removal device and process for waste gas from a high-temperature graphitization furnace, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a desulfurization and dust removal device for exhaust gas from a high-temperature graphitization furnace, comprising a desulfurization tower, a control panel fixedly installed on the side wall of the desulfurization tower, an inlet pipe extending through and fixedly connected to the side wall of the desulfurization tower, an outlet pipe fixedly connected to the upper end of one side of the desulfurization tower, a storage box placed at the bottom of the inner surface of the desulfurization tower, the storage box having a corresponding unloading box door, the unloading box door being movably installed on the side wall of the desulfurization tower, a hydrocyclone fixedly connected to one end of the inlet pipe extending into the desulfurization tower, the inlet pipe being fixedly connected to the upper end of the side wall of the hydrocyclone, and an outlet pipe extending through and fixedly connected to the center of the top of the hydrocyclone, an outlet hole being opened at the bottom of the hydrocyclone, a connecting rod fixedly connected to the outer side wall of the hydrocyclone, the connecting rod being fixedly connected to the side wall of the desulfurization tower, a temperature sensor being provided on the hydrocyclone, and the temperature sensor being electrically connected to the control panel;

[0006] Preferably, an annular cavity is formed through the side wall of the smoke inlet pipe, a spiral blade is fixedly connected inside the annular cavity, fine holes are densely formed on the spiral blade, and a guide plate is fixedly installed on the top of the inner surface of the cyclone separator, the guide plate corresponding to the smoke inlet pipe.

[0007] Preferably, a desulfurization box is fixedly installed on the inner wall of the desulfurization tower. The upper surface of the desulfurization box is sloping, the bottom of the desulfurization box is coplanar with the flue gas inlet pipe, and a drop hole is opened at the bottom of the desulfurization box.

[0008] Preferably, a filter plate is slidably connected inside the desulfurization box, and a vertical plate is fixedly connected to one side of the upper surface of the filter plate. The vertical plate extends through the desulfurization box and is slidably and sealed to the desulfurization box. A horizontal plate is fixedly connected to one end of the vertical plate extending out of the desulfurization box. A rectangular groove is opened on the side wall of the desulfurization tower. A protective box is provided outside the rectangular groove. The protective box is fixedly connected to the outer side wall of the desulfurization tower. The horizontal plate extends through the rectangular groove and is slidably connected to the rectangular groove. One end of the horizontal plate extending out of the rectangular groove is located inside the protective box. A control rod is fixedly connected to one end of the horizontal plate located in the protective box. The control rod extends through the protective box and is slidably connected to the protective box. An electric cylinder is fixedly installed on the upper side of one side of the desulfurization tower. The control rod is set on the electric cylinder. One side of the desulfurization box is coplanar with the desulfurization tower. A desulfurization box door is movably provided on the side wall of the desulfurization box and the desulfurization tower that are coplanar. Crushing rods are densely and fixedly connected to the top of the inner surface of the desulfurization box.

[0009] Preferably, a zigzag tube is fixedly connected to one side of the annular cavity, one end of the zigzag tube extends into the desulfurization tower and is fixedly connected to the desulfurization tower, a hollow cavity is formed on the side wall of the hydrocyclone, one end of the zigzag tube extending into the desulfurization tower is fixedly connected to the hollow cavity, the bottom of the hollow cavity is fixedly connected to the outlet, and a baffle plate is fixedly connected inside the annular cavity, the baffle plate being located on the side near the spiral blade at the connection between the zigzag tube and the annular cavity.

[0010] Preferably, a fixing plate is fixedly connected to the desulfurization tower, and multiple perforations are equally spaced on the fixing plate. A fixing plate is attached to the fixing plate, and multiple dust removal filter cartridges are fixedly connected to the upper end face of the fixing plate. The dust removal filter cartridges extend through the perforations and are slidably connected to the perforations.

[0011] Preferably, a maintenance box door is movably provided on the upper end face of the desulfurization tower, and a stop block is fixedly connected to the bottom of the maintenance box door, with the bottom of the stop block abutting against the fixing plate.

[0012] Preferably, a plurality of the dust collector filter cartridges extend through and are slidably connected to scrapers.

[0013] Preferably, a guide block is provided directly above the outlet pipe. The upper end of the guide block is conical, and the lower end of the guide block is inverted conical. A connecting strip is fixedly connected to the side wall of the guide block, and the other end of the connecting strip is fixedly connected to the inner wall of the desulfurization tower.

[0014] Preferably, a waste gas desulfurization and dust removal process for a high-temperature graphitization furnace includes: S1: Connecting the flue pipe and the fan, and then setting the temperature control value inside the hydrocyclone to 230℃ through the control panel. When the temperature inside the hydrocyclone is lower than 230℃, the control panel will correspondingly reduce the rate of ambient temperature air supplied by the fan through the annular cavity to the hydrocyclone. When the temperature inside the hydrocyclone is higher than 230℃, the control panel will correspondingly increase the flow rate of ambient temperature air supplied by the fan through the annular cavity to the hydrocyclone, so as to ensure that the temperature inside the hydrocyclone is maintained in the 230℃ range.

[0015] S2: The high-temperature flue gas in the graphitization furnace is sent into the flue gas inlet pipe by the fan, and finally sent into the hydrocyclone for cooling, desulfurization and primary dust removal.

[0016] S3: After being processed by the cyclone separator, the high-temperature flue gas undergoes secondary fine dust removal by the dust collector filter cartridge. The purified clean gas flows out through the outlet pipe, and the impurities eventually fall into the storage tank.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, the flue pipe is connected to the fan. The fan sends the high-temperature flue gas generated by the graphitization furnace into the flue pipe. At the same time, the fan draws in ambient air and sends it into the annular cavity. The ambient air in the annular cavity exchanges heat with the high-temperature flue gas in the flue pipe to reduce the temperature of the flue gas in the flue pipe. This also prevents the hydrocyclone from being subjected to high temperatures for a long time, thereby extending the service life of the hydrocyclone.

[0019] 2. In this invention, high-temperature flue gas enters the cyclone separator through the flue gas inlet pipe, while room temperature air enters the cyclone separator simultaneously. Since the annular cavity is inside the flue gas inlet pipe, when room temperature air and high-temperature flue gas flow into the cyclone separator simultaneously, the room temperature air will surround the high-temperature flue gas and eventually mix with the high-temperature flue gas to neutralize the high temperature, thereby cooling the high-temperature flue gas.

[0020] 3. In this invention, after entering the hydrocyclone, a spiral vortex is formed from top to bottom under the guidance of the guide plate. Large particles of impurities are thrown to the cylinder wall and settled by centrifugal force. Large particles of impurities in the high-temperature flue gas fall downward through the outlet under the action of centrifugal force. The flue gas that has been cooled and cleaned flows upward through the outlet pipe. Moreover, the high-temperature flue gas expands and the dust has strong fluidity, making it difficult to separate large particles of dust by centrifugal force. After the flue gas is cooled, the flue gas density increases and the inertia of solid dust particles is enhanced. They are more likely to be thrown to the cylinder wall under the centrifugal force in the hydrocyclone, which significantly improves the separation effect of large particles of carbon black, coke particles and other impurities.

[0021] 4. In this invention, the desulfurization chamber door is opened, and alkaline dry powder is placed on the filter plate. The electric cylinder is started via the control panel. The operation of the electric cylinder drives the horizontal plate downward through the control lever. The horizontal plate, through the vertical plate, drives the filter plate up and down, thereby screening the alkaline dry powder. The fine alkaline dry powder falls through the filter plate and finally falls into the annular cavity through the drop hole. When the air in the annular cavity passes through, it carries the alkaline dry powder along with it. After entering the hydrocyclone, the alkaline dry powder coats the flue gas. The alkaline dry powder and flue gas mix and swirl together in the hydrocyclone, and the alkaline dry powder in the flue gas is also mixed with the flue gas. It displaces HF and HCl, and its contact area is larger than that of direct powder spraying, so its desulfurization effect is better;

[0022] 5. The present invention, through the design of the spiral blade, serves two purposes. Firstly, it acts as a connecting base for the inner wall of the annular cavity, connecting the inner walls on both sides of the annular cavity. Secondly, after the alkaline dry powder falls into the annular cavity, it enters the spiral blade area. When room temperature air moves within the annular cavity, some of it moves with the spiral blade, while a small portion moves through the fine holes on the spiral blade. As the spiral blade guides the movement, it carries the alkaline dry powder in this area. As the alkaline dry powder moves, it passes through the fine holes under the action of room temperature air, resulting in a uniform annular distribution when it exits the annular cavity and enters the hydrocyclone. This prevents the alkaline dry powder from agglomerating and clumping, thereby improving the mixing uniformity of the alkaline dry powder and high-temperature flue gas, and further promoting the desulfurization effect of the flue gas.

[0023] 6. The present invention, through the design of the filter plate, causes the fine alkaline dry powder to vibrate continuously as the filter plate moves up and down, and then enters the annular cavity through the filter plate. Finally, the clumps or large-particle alkaline dry powder remain on the filter plate. This method ensures that only fine alkaline dry powder enters the annular cavity, thereby promoting the desulfurization effect.

[0024] 7. In this invention, when room temperature air moves within the annular cavity, a small portion is initially blocked by the baffle plate. The baffle plate has a downward-facing guide slope on the side facing the airflow direction. This small portion of the air is blocked by the baffle plate and eventually enters the hollow cavity through the folded tube, and is finally ejected from the outlet. This continuously exchanges heat with the flue gas inside the cyclone separator to reduce its temperature. At the same time, the continuous ejection of gas from the outlet accelerates the passage of large particles of impurities through the outlet, preventing large particles from clogging the outlet.

[0025] 8. The present invention, through the design of a temperature sensor inside the hydrocyclone, can monitor the flue gas temperature inside the hydrocyclone in real time, so as to control the flue gas temperature inside the hydrocyclone between 200 degrees Celsius and 260 degrees Celsius. This temperature range can ensure the efficient chemical reaction between alkaline dry powder and acidic gas, and prevent reaction failure and dust agglomeration caused by high temperature. At the same time, it can ensure the effect of cyclone centrifugal dust removal, and enable the desulfurization process and the dust removal process to operate in synergy and efficiency.

[0026] 9. In this invention, the alkaline dry powder on the filter plate moves up and down synchronously, and the alkaline dry powder is constantly struck and squeezed by the crushing rod above, which can promptly crush the alkaline dry powder into clumps, so that the alkaline dry powder entering the annular cavity remains in a fine state, and also prevents the alkaline dry powder from clumping and being unable to pass through the filter plate. When the filter plate moves up and down, it will continuously contact the crushing rod and be struck by the crushing rod to produce a vibration effect, which can effectively prevent the filter plate from clogging. The lower end of the crushing rod is wrapped with a wear-resistant rubber sleeve to prevent damage to the surface of the filter plate.

[0027] 10. In this invention, the flue gas that has undergone desulfurization and dust removal from the outlet pipe moves upward. When it passes through the dust removal filter cartridge, the remaining fine impurity particles in the flue gas are blocked by the filter holes of the dust removal filter cartridge. The remaining clean gas passes through the dust removal filter cartridge and is finally discharged through the outlet pipe, thereby improving the purification effect of the flue gas to meet environmental emission standards.

[0028] 11. In this invention, when the vertical plate moves up and down, it drives the scraper to move up and down. The scraper moves up and down and continuously scrapes off the impurity particles attached to the side wall of the dust collector filter cartridge to prevent the filter holes of the dust collector filter cartridge from being blocked, so as to ensure the long-term stability of the air volume of the dust collector filter cartridge, to ensure the long-term continuous dust removal capability, reduce the frequency of shutdown to clean the dust collector filter cartridge, and thus achieve better dust removal effect.

[0029] 12. In this invention, by opening the maintenance box door, the fixing plate and the dust collector filter cartridge can be directly removed as a whole, which facilitates the maintenance and cleaning of the dust collector filter cartridge. When installing it, simply insert the dust collector filter cartridge into the perforation so that the fixing plate fits against the fixing plate, and then close the maintenance box door. After closing the maintenance box door, the stop block on the maintenance box door directly abuts against the fixing plate, thereby fixing the fixing plate and the dust collector filter cartridge. Using the above fixing method, the dust collector filter cartridge can be fixed quickly without additional operation, which facilitates the disassembly, cleaning, inspection and replacement of the dust collector filter cartridge.

[0030] 13. In this invention, the inverted conical design of the lower end of the guide block is to guide the flue gas flowing out of the outlet pipe, thereby increasing the diffusion area of ​​the flue gas and making it more widely distributed, so as to prevent it from concentrating in one place and impacting the dust collectors in the middle, thus reducing the dust removal effect of the dust collectors. The design of the guide block can effectively prevent impurities blocked by the dust collectors from falling into the outlet pipe. The conical design of the upper end of the guide block is to facilitate the impurities falling on the guide block to fall down along its conical slope.

[0031] 14. In this invention, the design of the upper surface of the desulfurization box as a slope is to prevent impurities from accumulating rapidly on the desulfurization box. Attached Figure Description

[0032] Figure 1 This is an overall structural diagram of the present invention;

[0033] Figure 2 This is an overall side view of the present invention;

[0034] Figure 3 This is a cross-sectional view of the present invention;

[0035] Figure 4 This is a side sectional view of the present invention;

[0036] Figure 5 This is a combined view of the maintenance box door and the stop block of the present invention;

[0037] Figure 6 This is a cross-sectional view of the desulfurization box of the present invention;

[0038] Figure 7 For the present invention Figure 3 A magnified view of a section at point A in the middle;

[0039] Figure 8 For the present invention Figure 4 A magnified view of a section at point B in the middle;

[0040] Figure 9 For the present invention Figure 4 A magnified view of a section at point C;

[0041] Figure 10 For the present invention Figure 4 A magnified view of a section at point D;

[0042] Figure 11 For the present invention Figure 4 A magnified view of a section at point E in the middle.

[0043] In the picture:

[0044] 1. Desulfurization tower; 11. Control panel; 12. Inlet pipe; 13. Outlet pipe; 14. Storage tank; 15. Hydrocyclone; 16. Outlet pipe; 17. Outlet hole; 18. Connecting rod; 19. Unloading box door; 2. Annular cavity; 21. Spiral blade; 22. Fine hole; 23. Guide plate; 3. Desulfurization box; 31. Drop hole; 4. Vertical plate; 41. Filter plate; 42. Horizontal plate; 43. Protective box; 44. Rectangular trough; 45. Electric cylinder; 46. Desulfurization box door; 47. Crushing rod; 5. Folding tube; 51. Hollow cavity; 52. Wind baffle; 6. Fixing plate; 61. Perforation; 62. Fixing piece; 63. Dust collector filter cartridge; 7. Maintenance box door; 71. Stop block; 8. Scraper; 9. Guide block; 91. Connecting strip. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Please see Figures 1 to 11 The present invention provides a technical solution:

[0047] A desulfurization and dust removal device for exhaust gas from a high-temperature graphitization furnace includes a desulfurization tower 1. A control panel 11 is fixedly installed on the side wall of the desulfurization tower 1. An inlet pipe 12 extends through and is fixedly connected to the side wall of the desulfurization tower 1. An outlet pipe 13 is fixedly connected to the upper end of one side of the desulfurization tower 1. A storage box 14 is placed at the bottom of the inner surface of the desulfurization tower 1. The storage box 14 has a corresponding unloading door 19, which is movably installed on the side wall of the desulfurization tower 1. The inlet pipe 12 extends through... One end of the desulfurization tower 1 is fixedly connected to a hydrocyclone 15. The flue gas inlet pipe 12 is fixedly connected to the upper side wall of the hydrocyclone 15. The top center of the hydrocyclone 15 extends through and is fixedly connected to an outlet pipe 16. An outlet hole 17 is opened at the bottom of the hydrocyclone 15. A connecting rod 18 is fixedly connected to the outer side wall of the hydrocyclone 15. The connecting rod 18 is fixedly connected to the side wall of the desulfurization tower 1. A temperature sensor is installed on the hydrocyclone 15. The temperature sensor is electrically connected to the control panel 11.

[0048] As an embodiment of the present invention, as shown in the figure, an annular cavity 2 is provided through the side wall of the smoke inlet pipe 12, and a spiral blade 21 is fixedly connected inside the annular cavity 2. The spiral blade 21 is densely provided with fine holes 22, and a guide plate 23 is fixedly installed on the top of the inner surface of the cyclone separator 15. The guide plate 23 corresponds to the smoke inlet pipe 12.

[0049] During operation, the flue pipe 12 is connected to the fan. The fan sends the high-temperature flue gas generated by the graphitization furnace into the flue pipe 12. At the same time, the fan draws in ambient air and sends it into the annular cavity 2. The ambient air in the annular cavity 2 exchanges heat with the high-temperature flue gas in the flue pipe 12 to reduce the temperature of the flue gas in the flue pipe 12. This also prevents the hydrocyclone 15 from being subjected to high temperatures for a long time, thereby extending the service life of the hydrocyclone 15.

[0050] Then, the high-temperature flue gas enters the cyclone separator 15 from the flue gas inlet pipe 12, and at the same time, the ambient air enters the cyclone separator 15. Since the annular cavity 2 is inside the flue gas inlet pipe 12, when the ambient air and the high-temperature flue gas flow into the cyclone separator 15 at the same time, the ambient air will wrap around the high-temperature flue gas and eventually mix with the high-temperature flue gas to neutralize the high temperature, thereby cooling the high-temperature flue gas.

[0051] After entering the hydrocyclone 15, the flow is guided by the guide vane 23 to form a spiral flow from top to bottom. The centrifugal force throws large particles of impurities to the cylinder wall and settles. Under the action of centrifugal force, large particles of impurities in the high-temperature flue gas fall downward through the outlet 17. The flue gas that has been cooled and cleaned flows upward through the outlet pipe 16. Moreover, the high-temperature flue gas expands and the dust has strong fluidity, making it difficult to separate large particles of dust by centrifugal force. After the flue gas is cooled, the flue gas density increases and the inertia of solid dust particles is enhanced. They are more likely to be thrown to the cylinder wall under the centrifugal force in the hydrocyclone 15, which significantly improves the separation effect of large particles of carbon black, coke particles and other impurities.

[0052] The design of the spiral blade 21 serves two purposes. Firstly, it acts as a connecting base for the inner wall of the annular cavity 2, connecting the inner walls on both sides of the annular cavity 2. Secondly, after the alkaline dry powder falls into the annular cavity 2, it enters the spiral blade 21 area. When room temperature air moves within the annular cavity 2, some of it moves with the spiral blade 21, while a small portion moves through the fine holes 22 on the spiral blade 21. As the spiral blade 21 guides the movement, it carries the alkaline dry powder in this area. As the alkaline dry powder moves, it passes through the fine holes 22, and under the influence of room temperature air, some of it passes through the fine holes 22, resulting in a uniform annular distribution when it exits the annular cavity 2 and enters the hydrocyclone 15. This prevents the alkaline dry powder from agglomerating and clumping, thereby improving the mixing uniformity of the alkaline dry powder and high-temperature flue gas, and further promoting the desulfurization effect of the flue gas.

[0053] The temperature sensor inside the hydrocyclone 15 is designed to monitor the flue gas temperature in real time, so as to control the flue gas temperature in the hydrocyclone 15 between 200 degrees Celsius and 260 degrees Celsius. This temperature range can ensure the efficient chemical reaction between alkaline dry powder and acidic gas, prevent reaction failure and dust agglomeration caused by high temperature, and ensure the effect of cyclone centrifugal dust removal, so that the desulfurization process and the dust removal process can operate in synergy and efficiency.

[0054] As an embodiment of the present invention, as shown in the figure, a desulfurization box 3 is fixedly installed on the inner wall of the desulfurization tower 1. The upper surface of the desulfurization box 3 is a slope, the bottom of the desulfurization box 3 is coplanar with the flue gas inlet pipe 12, and a drop hole 31 is opened at the bottom of the desulfurization box 3.

[0055] The sloping design of the upper surface of the desulfurization box 3 during operation is to prevent impurities from accumulating rapidly on the desulfurization box 3.

[0056] As an embodiment of the present invention, as shown in the figure, a filter plate 41 is slidably connected inside the desulfurization tank 3. A vertical plate 4 is fixedly connected to one side of the upper end face of the filter plate 41. The vertical plate 4 extends through the desulfurization tank 3 and is slidably and sealed to the desulfurization tank 3. A horizontal plate 42 is fixedly connected to one end of the vertical plate 4 extending out of the desulfurization tank 3. A rectangular groove 44 is provided on the side wall of the desulfurization tower 1. A protective box 43 is provided on the outside of the rectangular groove 44. The protective box 43 is fixedly connected to the outside wall of the desulfurization tower 1. The horizontal plate 42 extends through the rectangular groove 44 and is slidably connected to the rectangular groove 44. The horizontal plate 42 extends out of the rectangular groove 44 and is located inside the protective box 43. A control rod is fixedly connected to one end of the horizontal plate 42 located in the protective box 43. The control rod extends through the protective box 43 and is slidably connected to the protective box 43. An electric cylinder 45 is fixedly installed on the upper side of one side of the desulfurization tower 1. The control rod is set on the electric cylinder 45. One side of the desulfurization box 3 is coplanar with the desulfurization tower 1. A desulfurization box door 46 is movably provided on the side wall of the desulfurization box 3 and the desulfurization tower 1. Crushing rods 47 are densely fixedly connected to the top of the inner surface of the desulfurization box 3.

[0057] During operation, the desulfurization chamber door 46 is opened, and alkaline dry powder is placed on the filter plate 41. The electric cylinder 45 is started via the control panel 11. The operation of the electric cylinder 45 moves the horizontal plate 42 downward via the control lever. The horizontal plate 42 moves the filter plate 41 up and down via the vertical plate 4, thereby screening the alkaline dry powder. The fine alkaline dry powder falls through the filter plate 41 and finally falls into the annular cavity 2 through the drop hole 31. When the air in the annular cavity 2 passes through, it carries the alkaline dry powder along with it. After entering the hydrocyclone 15, the alkaline dry powder coats the flue gas. The alkaline dry powder and flue gas mix and swirl together in the hydrocyclone 15, and the alkaline dry powder in the flue gas is also coated with alkaline dry powder. It displaces HF and HCl, and its contact area is larger than that of direct powder spraying, so its desulfurization effect is better;

[0058] The design of the filter plate 41 allows the fine alkaline dry powder to continuously vibrate as it moves up and down, passing through the filter plate 41 and entering the annular cavity 2. Finally, the agglomerated or large-particle alkaline dry powder remains on the filter plate 41. This method ensures that only fine alkaline dry powder enters the annular cavity 2, thereby promoting the desulfurization effect.

[0059] As the filter plate 41 moves up and down, the alkaline dry powder on the filter plate 41 moves up and down synchronously. The alkaline dry powder is constantly struck and squeezed by the crushing rod 47 above, which can promptly crush the clumps of alkaline dry powder, keeping the alkaline dry powder entering the annular cavity 2 in a fine state. It also prevents the alkaline dry powder from clumping and being unable to pass through the filter plate 41. When the filter plate 41 moves up and down, it will continuously contact the crushing rod 47 and be struck by the crushing rod 47 to produce a vibration effect, which can effectively prevent the filter plate 41 from clogging. The lower end of the crushing rod 47 is wrapped with a wear-resistant rubber sleeve to prevent damage to the surface of the filter plate 41.

[0060] As an embodiment of the present invention, as shown in the figure, a zigzag tube 5 is fixedly connected to one side of the annular cavity 2. One end of the zigzag tube 5 extends into the desulfurization tower 1 and is fixedly connected to the desulfurization tower 1. A hollow cavity 51 is opened on the side wall of the hydrocyclone 15. One end of the zigzag tube 5 extending into the desulfurization tower 1 is fixedly connected to the hollow cavity 51. The bottom of the hollow cavity 51 is fixedly connected to the outlet 17. A baffle plate 52 is fixedly connected inside the annular cavity 2. The baffle plate 52 is located on the side near the spiral blade 21 at the connection between the zigzag tube 5 and the annular cavity 2.

[0061] During operation, when room temperature air moves within the annular cavity 2, a small portion is initially blocked by the baffle plate 52. The baffle plate 52 has a downward-facing guide slope on the side facing the airflow direction. This small portion of the air is blocked by the baffle plate 52 and eventually enters the hollow cavity 51 through the folding tube 5, and is finally ejected from the outlet 17. This continuously exchanges heat with the flue gas in the cyclone separator 15 to reduce the temperature of the flue gas in the cyclone separator 15. At the same time, the continuous ejection of gas from the outlet 17 accelerates the falling of large particulate impurities in the cyclone separator 15 through the outlet 17, and also prevents large particulate impurities from clogging the outlet 17.

[0062] The alkaline dry powder uses sodium bicarbonate dry powder, which has higher reactivity than common desulfurization powders such as limestone and quicklime. Furthermore, its optimal reaction temperature is well-suited to the 200-260°C range controlled within this hydrocyclone 15. It can not only remove sulfur dioxide from flue gas... It can also remove acidic pollutants such as HF and HCl from flue gas;

[0063] First, the sodium bicarbonate powder undergoes an activation reaction within hydrocyclone 15. The chemical reaction equation is as follows:

[0064] ;

[0065] Then, a desulfurization reaction is carried out to remove sulfur dioxide from the flue gas. The chemical reaction equation is:

[0066] ;

[0067] Secondly, an oxidation side reaction occurs in the flue gas, and its chemical reaction equation is as follows:

[0068] ;

[0069] Similarly, the chemical reaction equations for removing HF and HCl from flue gas are as follows:

[0070] ;

[0071] ; .

[0072] As an embodiment of the present invention, as shown in the figure, a fixing plate 6 is fixedly connected to the desulfurization tower 1. A plurality of perforations 61 are equally spaced on the fixing plate 6. A fixing piece 62 is attached to the fixing plate 6. A plurality of dust removal filter cartridges 63 are fixedly connected to the upper end face of the fixing piece 62. The dust removal filter cartridges 63 extend through the perforations 61 and are slidably connected to the perforations 61.

[0073] During operation, the flue gas that has undergone desulfurization and dust removal from the outlet pipe 16 moves upward. When it passes through the dust removal filter cartridge 63, the remaining fine impurity particles in the flue gas are blocked by the filter holes of the dust removal filter cartridge 63. The remaining clean gas passes through the dust removal filter cartridge 63 and is finally discharged through the outlet pipe 13, thereby improving the purification effect of the flue gas to meet the environmental emission standards.

[0074] When the vertical plate 4 moves up and down, it drives the scraper 8 to move up and down. The scraper 8 moves up and down and continuously scrapes off the impurity particles attached to the side wall of the dust collector filter cartridge 63 to prevent the filter holes of the dust collector filter cartridge 63 from being blocked, so as to ensure the long-term stability of the air volume of the dust collector filter cartridge 63, to ensure the long-term continuous dust removal capability, reduce the frequency of shutdown to clean the dust collector filter cartridge 63, and thus achieve better dust removal effect.

[0075] Impurities falling from the hydrocyclone 15 and those intercepted by the dust removal filter cartridge 63 eventually fall into the storage tank 14 at the bottom of the desulfurization tower 1. The storage tank 14 can be centrally processed by opening the unloading box door 19.

[0076] As an embodiment of the present invention, as shown in the figure, a maintenance box door 7 is movably provided on the upper end face of the desulfurization tower 1, and a stop block 71 is fixedly connected to the bottom of the maintenance box door 7, with the bottom of the stop block 71 abutting against the fixing plate 62.

[0077] During operation, the fixing plate 62 and the dust collector filter cartridge 63 can be directly removed by opening the maintenance box door 7, facilitating the maintenance and cleaning of the dust collector filter cartridge 63. When installing it, simply insert the dust collector filter cartridge 63 into the through hole 61 so that the fixing plate 62 fits against the fixing plate 6, and then close the maintenance box door 7. After closing the maintenance box door 7, the stop block 71 on the maintenance box door 7 directly abuts against the fixing plate 62, thereby fixing the fixing plate 62 and the dust collector filter cartridge 63. Using the above fixing method, the dust collector filter cartridge 63 can be quickly fixed without additional operation, which facilitates the disassembly, cleaning, inspection and replacement of the dust collector filter cartridge 63.

[0078] As an embodiment of the present invention, as shown in the figure, a plurality of dust removal filter cartridges 63 extend through and are slidably connected to scrapers 8.

[0079] A guide block 9 is provided directly above the outlet pipe 16. The upper end of the guide block 9 is conical, and the lower end of the guide block 9 is inverted conical. A connecting strip 91 is fixedly connected to the side wall of the guide block 9, and the other end of the connecting strip 91 is fixedly connected to the inner wall of the desulfurization tower 1.

[0080] During operation, the inverted cone shape at the lower end of the guide block 9 is designed to guide the flue gas flowing out of the outlet pipe 16, thereby increasing the diffusion area of ​​the flue gas and making it more widely distributed. This prevents the flue gas from concentrating in one place and impacting the dust collector filter cartridges 63 in the middle, thus reducing the dust removal effect of the dust collector filter cartridges 63. The design of the guide block 9 can effectively prevent impurities blocked by the dust collector filter cartridges 63 from falling into the outlet pipe 16. The cone shape at the upper end of the guide block 9 is designed to facilitate the impurities falling on the guide block 9 to fall down along its cone-shaped slope.

[0081] A process for desulfurization and dust removal of exhaust gas from a high-temperature graphitization furnace includes: S1: Connecting the flue gas inlet pipe 12 and the fan, and then setting the temperature control value inside the hydrocyclone 15 to 230℃ through the control panel 11. When the temperature inside the hydrocyclone 15 is lower than 230℃, the control panel 11 will correspondingly reduce the rate of ambient temperature air supplied by the fan to the hydrocyclone 15 through the annular cavity 2. When the temperature inside the hydrocyclone 15 is higher than 230℃, the control panel 11 will correspondingly increase the flow rate of ambient temperature air supplied by the fan to the hydrocyclone 15 through the annular cavity 2 to ensure that the temperature inside the hydrocyclone 15 is maintained in the 230℃ range.

[0082] S2: The high-temperature flue gas in the graphitization furnace is sent into the flue gas inlet pipe 12 by the fan, and finally sent into the hydrocyclone 15 for cooling, desulfurization and primary dust removal.

[0083] S3: After being processed by the cyclone separator 15, the high-temperature flue gas is subjected to secondary fine dust removal by the dust removal filter cartridge 63. The purified clean gas flows out through the outlet pipe 13, and the impurities eventually fall into the storage box 14.

[0084] Working principle: During operation, the inlet pipe 12 is connected to the fan. The fan sends the high-temperature flue gas generated by the graphitization furnace into the inlet pipe 12. At the same time, the fan draws in ambient air and sends it into the annular cavity 2. The ambient air in the annular cavity 2 exchanges heat with the high-temperature flue gas in the inlet pipe 12 to reduce the temperature of the flue gas in the inlet pipe 12. This also prevents the hydrocyclone 15 from being subjected to high temperatures for a long time, thereby extending the service life of the hydrocyclone 15.

[0085] Then, the high-temperature flue gas enters the cyclone separator 15 from the flue gas inlet pipe 12, and at the same time, the ambient air enters the cyclone separator 15. Since the annular cavity 2 is inside the flue gas inlet pipe 12, when the ambient air and the high-temperature flue gas flow into the cyclone separator 15 at the same time, the ambient air will wrap around the high-temperature flue gas and eventually mix with the high-temperature flue gas to neutralize the high temperature, thereby cooling the high-temperature flue gas.

[0086] After entering the hydrocyclone 15, the flow is guided by the guide vane 23 to form a spiral flow from top to bottom. The centrifugal force throws large particles of impurities to the cylinder wall and settles. Under the action of centrifugal force, large particles of impurities in the high-temperature flue gas fall downward through the outlet 17. The flue gas that has been cooled and cleaned flows upward through the outlet pipe 16. Moreover, the high-temperature flue gas expands and the dust has strong fluidity, making it difficult to separate large particles of dust by centrifugal force. After the flue gas is cooled, the flue gas density increases and the inertia of solid dust particles is enhanced. They are more likely to be thrown to the cylinder wall under the centrifugal force in the hydrocyclone 15, which significantly improves the separation effect of large particles of carbon black, coke particles and other impurities.

[0087] Open the desulfurization chamber door 46, place alkaline dry powder on the filter plate 41, and start the electric cylinder 45 through the control panel 11. The operation of the electric cylinder 45 drives the horizontal plate 42 to move downward through the control lever. The horizontal plate 42 drives the filter plate 41 to move up and down through the vertical plate 4, thereby screening the alkaline dry powder. The alkaline dry powder with a fine particle size falls through the filter plate 41 and finally falls into the annular cavity 2 through the drop hole 31. When the air in the annular cavity 2 passes through, it carries the alkaline dry powder with it. After entering the hydrocyclone 15, the alkaline dry powder coats the flue gas. The alkaline dry powder and flue gas mix and swirl together in the hydrocyclone 15, and the alkaline dry powder in the flue gas is also coated with alkaline dry powder. It displaces HF and HCl, and its contact area is larger than that of direct powder spraying, so its desulfurization effect is better;

[0088] The design of the spiral blade 21 serves two purposes. Firstly, it acts as a connecting base for the inner wall of the annular cavity 2, connecting the inner walls on both sides of the annular cavity 2. Secondly, after the alkaline dry powder falls into the annular cavity 2, it enters the spiral blade 21 area. When room temperature air moves within the annular cavity 2, some of it moves with the spiral blade 21, while a small portion moves through the fine holes 22 on the spiral blade 21. As the spiral blade 21 guides the movement, it carries the alkaline dry powder in this area. As the alkaline dry powder moves, it passes through the fine holes 22, and under the influence of room temperature air, some of it passes through the fine holes 22, resulting in a uniform annular distribution when it exits the annular cavity 2 and enters the hydrocyclone 15. This prevents the alkaline dry powder from agglomerating and clumping, thereby improving the mixing uniformity of the alkaline dry powder and high-temperature flue gas, and further promoting the desulfurization effect of the flue gas.

[0089] The design of the filter plate 41 allows the fine alkaline dry powder to continuously vibrate as it moves up and down, passing through the filter plate 41 and entering the annular cavity 2. Finally, the agglomerated or large-particle alkaline dry powder remains on the filter plate 41. This method ensures that only fine alkaline dry powder enters the annular cavity 2, thereby promoting the desulfurization effect.

[0090] When room temperature air moves within the annular cavity 2, a small portion is initially blocked by the baffle plate 52. The baffle plate 52 has a downward-facing guide slope on the side facing the airflow direction. This small portion of the air is blocked by the baffle plate 52 and eventually enters the hollow cavity 51 through the folding tube 5, and is finally ejected from the outlet 17. This continuously exchanges heat with the flue gas in the cyclone separator 15 to reduce the temperature of the flue gas in the cyclone separator 15. At the same time, the continuous ejection of gas from the outlet 17 accelerates the falling of large particulate impurities in the cyclone separator 15 through the outlet 17, and also prevents large particulate impurities from clogging the outlet 17.

[0091] The temperature sensor inside the hydrocyclone 15 is designed to monitor the flue gas temperature in real time, so as to control the flue gas temperature in the hydrocyclone 15 between 200 degrees Celsius and 260 degrees Celsius. This temperature range can ensure the efficient chemical reaction between alkaline dry powder and acidic gas, prevent reaction failure and dust agglomeration caused by high temperature, and ensure the effect of cyclone centrifugal dust removal, so that the desulfurization process and the dust removal process can operate in synergy and efficiency.

[0092] As the filter plate 41 moves up and down, the alkaline dry powder on the filter plate 41 moves up and down synchronously. The alkaline dry powder is constantly struck and squeezed by the crushing rod 47 above, which can promptly crush the clumps of alkaline dry powder, keeping the alkaline dry powder entering the annular cavity 2 in a fine state. It also prevents the alkaline dry powder from clumping and being unable to pass through the filter plate 41. When the filter plate 41 moves up and down, it will continuously contact the crushing rod 47 and be struck by the crushing rod 47 to produce a vibration effect, which can effectively prevent the filter plate 41 from clogging. The lower end of the crushing rod 47 is wrapped with a wear-resistant rubber sleeve to prevent damage to the surface of the filter plate 41.

[0093] The alkaline dry powder uses sodium bicarbonate dry powder, which has higher reactivity than common desulfurization powders such as limestone and quicklime. Furthermore, its optimal reaction temperature is well-suited to the 200-260°C range controlled within this hydrocyclone 15. It can not only remove sulfur dioxide from flue gas... It can also remove acidic pollutants such as HF and HCl from flue gas;

[0094] First, the sodium bicarbonate powder undergoes an activation reaction within hydrocyclone 15. The chemical reaction equation is as follows:

[0095] ;

[0096] Then, a desulfurization reaction is carried out to remove sulfur dioxide from the flue gas. The chemical reaction equation is:

[0097] ;

[0098] Secondly, an oxidation side reaction occurs in the flue gas, and its chemical reaction equation is as follows:

[0099] ;

[0100] Similarly, the chemical reaction equations for removing HF and HCl from flue gas are as follows:

[0101] ;

[0102] ;

[0103] The flue gas that has undergone desulfurization and dust removal from the outlet pipe 16 moves upward. When it passes through the dust removal filter cartridge 63, the remaining fine impurity particles in the flue gas are blocked by the filter holes of the dust removal filter cartridge 63. The remaining clean gas passes through the dust removal filter cartridge 63 and is finally discharged through the outlet pipe 13, thereby improving the purification effect of the flue gas to meet the environmental emission standards.

[0104] When the vertical plate 4 moves up and down, it drives the scraper 8 to move up and down. The scraper 8 continuously scrapes off the impurity particles attached to the side wall of the dust collector filter cartridge 63 to prevent the filter holes of the dust collector filter cartridge 63 from being blocked, so as to ensure the long-term stability of the air volume of the dust collector filter cartridge 63, to ensure the long-term continuous dust removal capability, reduce the frequency of shutdown to clean the dust collector filter cartridge 63, and thus achieve better dust removal effect.

[0105] By opening the maintenance box door 7, the fixing plate 62 and the dust collector filter cartridge 63 can be taken out as a whole for easy maintenance and cleaning of the dust collector filter cartridge 63. When installing it, simply insert the dust collector filter cartridge 63 into the through hole 61 so that the fixing plate 62 fits against the fixing plate 6, and then close the maintenance box door 7. After closing the maintenance box door 7, the stop block 71 on the maintenance box door 7 directly abuts against the fixing plate 62, thereby fixing the fixing plate 62 and the dust collector filter cartridge 63. Using the above fixing method, the dust collector filter cartridge 63 can be fixed quickly without additional operation, which facilitates the disassembly, cleaning, inspection and replacement of the dust collector filter cartridge 63.

[0106] The inverted cone shape at the lower end of the guide block 9 is designed to guide the flue gas flowing out of the outlet pipe 16, thereby increasing the diffusion area of ​​the flue gas and making it more widely distributed. This prevents the flue gas from concentrating in one place and impacting the dust collector filter cartridges 63 in the middle, thus reducing the dust removal efficiency of the dust collector filter cartridges 63. The design of the guide block 9 can effectively prevent impurities blocked by the dust collector filter cartridges 63 from falling into the outlet pipe 16. The cone shape at the upper end of the guide block 9 is designed to facilitate the impurities falling on the guide block 9 to fall down along its cone-shaped slope.

[0107] The sloping design of the upper surface of the desulfurization box 3 is to prevent impurities from accumulating rapidly on the desulfurization box 3.

[0108] Impurities falling from the hydrocyclone 15 and those intercepted by the dust removal filter cartridge 63 eventually fall into the storage tank 14 at the bottom of the desulfurization tower 1. The storage tank 14 can be centrally processed by opening the unloading box door 19.

[0109] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A desulfurization and dust removal device for waste gas from a high-temperature graphitization furnace, comprising a desulfurization tower (1), characterized in that: A control panel (11) is fixedly installed on the side wall of the desulfurization tower (1). An inlet pipe (12) extends through and is fixedly connected to the side wall of the desulfurization tower (1). An outlet pipe (13) is fixedly connected to the upper end of one side of the desulfurization tower (1). A storage box (14) is placed at the bottom of the inner surface of the desulfurization tower (1). The storage box (14) has a corresponding unloading box door (19). The unloading box door (19) is movably installed on the side wall of the desulfurization tower (1). One end of the inlet pipe (12) extending into the desulfurization tower (1) is fixedly connected to... The cyclone separator (15) has an inlet pipe (12) fixedly connected to the upper side wall of the cyclone separator (15), and an outlet pipe (16) extends through and is fixedly connected to the center of the top of the cyclone separator (15). An outlet hole (17) is opened at the bottom of the cyclone separator (15). A connecting rod (18) is fixedly connected to the outer side wall of the cyclone separator (15). The connecting rod (18) is fixedly connected to the side wall of the desulfurization tower (1). A temperature sensor is installed on the cyclone separator (15). The temperature sensor is electrically connected to the control panel (11).

2. The waste gas desulfurization and dust removal device for a high-temperature graphitization furnace according to claim 1, characterized in that: The side wall of the smoke inlet pipe (12) is provided with an annular cavity (2), and a spiral blade (21) is fixedly connected inside the annular cavity (2). The spiral blade (21) is densely provided with fine holes (22). A guide plate (23) is fixedly installed on the top of the inner surface of the cyclone separator (15). The guide plate (23) corresponds to the smoke inlet pipe (12).

3. The waste gas desulfurization and dust removal device for a high-temperature graphitization furnace according to claim 2, characterized in that: A desulfurization box (3) is fixedly installed on the inner wall of the desulfurization tower (1). The upper surface of the desulfurization box (3) is a slope. The bottom of the desulfurization box (3) is coplanar with the flue gas inlet pipe (12), and a drop hole (31) is opened at the bottom of the desulfurization box (3).

4. The waste gas desulfurization and dust removal device for a high-temperature graphitization furnace according to claim 3, characterized in that: A filter plate (41) is slidably connected inside the desulfurization box (3). A vertical plate (4) is fixedly connected to one side of the upper end face of the filter plate (41). The vertical plate (4) extends through the desulfurization box (3) and is slidably connected to the desulfurization box (3). A horizontal plate (42) is fixedly connected to one end of the vertical plate (4) extending out of the desulfurization box (3). A rectangular groove (44) is provided on the side wall of the desulfurization tower (1). A protective box (43) is provided on the outside of the rectangular groove (44). The protective box (43) is fixedly connected to the outside wall of the desulfurization tower (1). The horizontal plate (42) extends through the rectangular groove (44) and is slidably connected to the rectangular groove (44). One end of the plate (42) extending out of the rectangular groove (44) is located inside the protective box (43), and a control rod is fixedly connected to one end of the horizontal plate (42) located in the protective box (43). The control rod extends through the protective box (43) and is slidably connected to the protective box (43). An electric cylinder (45) is fixedly installed on the upper side of one side of the desulfurization tower (1). The control rod is set on the electric cylinder (45). One side of the desulfurization box (3) is coplanar with the desulfurization tower (1). A desulfurization box door (46) is movably installed on the side wall of the desulfurization box (3) and the desulfurization tower (1) coplanar. A crushing rod (47) is densely fixedly connected to the top of the inner surface of the desulfurization box (3).

5. The waste gas desulfurization and dust removal device for a high-temperature graphitization furnace according to claim 4, characterized in that: One side of the annular cavity (2) is fixedly connected to a zigzag tube (5). One end of the zigzag tube (5) extends into the desulfurization tower (1) and is fixedly connected to the desulfurization tower (1). A hollow cavity (51) is opened on the side wall of the hydrocyclone (15). One end of the zigzag tube (5) extends into the desulfurization tower (1) and is fixedly connected to the hollow cavity (51). The bottom of the hollow cavity (51) is fixedly connected to the outlet (17). A wind baffle (52) is fixedly connected inside the annular cavity (2). The wind baffle (52) is located on the side of the zigzag tube (5) and the annular cavity (2) close to the spiral blade (21).

6. The waste gas desulfurization and dust removal device for a high-temperature graphitization furnace according to claim 5, characterized in that: A fixing plate (6) is fixedly connected to the desulfurization tower (1). Multiple perforations (61) are equally spaced on the fixing plate (6). A fixing piece (62) is attached to the fixing plate (6). Multiple dust removal filter cartridges (63) are fixedly connected to the upper end face of the fixing piece (62). The dust removal filter cartridges (63) extend through the perforations (61) and are slidably connected to the perforations (61).

7. The waste gas desulfurization and dust removal device for a high-temperature graphitization furnace according to claim 6, characterized in that: The desulfurization tower (1) is movably provided with a maintenance box door (7) on the upper end face. A stop block (71) is fixedly connected to the bottom of the maintenance box door (7). The bottom of the stop block (71) abuts against the fixing plate (62).

8. The waste gas desulfurization and dust removal device for a high-temperature graphitization furnace according to claim 7, characterized in that: Multiple dust collector filter cartridges (63) extend through and are slidably connected to scrapers (8).

9. A waste gas desulfurization and dust removal device for a high-temperature graphitization furnace according to claim 8, characterized in that: A guide block (9) is provided directly above the outlet pipe (16). The upper end of the guide block (9) is conical, and the lower end of the guide block (9) is inverted conical. A connecting strip (91) is fixedly connected to the side wall of the guide block (9), and the other end of the connecting strip (91) is fixedly connected to the inner wall of the desulfurization tower (1).

10. A waste gas desulfurization and dust removal process for a high-temperature graphitization furnace, applied to the waste gas desulfurization and dust removal device for the high-temperature graphitization furnace according to any one of claims 1-9, characterized in that, The process includes: S1: Connect the inlet pipe (12) and the fan, and then set the temperature control value inside the cyclone separator (15) to 230°C through the control panel (11). When the temperature inside the cyclone separator (15) is lower than 230°C, the control panel (11) will correspondingly reduce the rate of room temperature air sent by the fan through the annular cavity (2) to the cyclone separator (15). When the temperature inside the cyclone separator (15) is higher than 230°C, the control panel (11) will correspondingly increase the flow rate of room temperature air sent by the fan through the annular cavity (2) to the cyclone separator (15) to ensure that the temperature inside the cyclone separator (15) is maintained in the 230°C range. S2: The high-temperature flue gas in the graphitization furnace is sent into the flue gas inlet pipe (12) by the blower, and finally sent into the hydrocyclone (15) for cooling, desulfurization and primary dust removal; S3: After being processed by the cyclone separator (15), the high-temperature flue gas is subjected to secondary fine dust removal by the dust removal filter cartridge (63). The purified clean gas flows out through the outlet pipe (13), and the impurities eventually fall into the storage box (14).

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