A fine filtering device for modified carbon black production

Abstract

The application discloses a fine filtering device for modified carbon black production, which comprises a filtering box body, a hopper-shaped material collecting hopper fixedly arranged at the bottom of the filtering box body, a material discharging valve fixedly arranged at the bottom of the material collecting hopper, a flue gas inlet fixedly arranged at the side of the filtering box body and communicating with the material collecting hopper, a horizontal fixed flower plate fixedly arranged at the position close to the upper end of the filtering box body, a plurality of through holes uniformly arranged on the fixed flower plate in a rectangular array, a filtering assembly respectively arranged in each through hole of the fixed flower plate, an exhaust pipe arranged on the side wall of the filtering box body and located above the fixed flower plate, and a vibrating assembly and a spraying assembly arranged on the filtering box body and used for removing the carbon black outside the filtering assemblies. The application can effectively strip the carbon black particles on the surface of the filtering cloth bag, avoid forming a dense powder cake layer, and thus improve the filtering efficiency.

Description

Technical Field

[0001] This invention relates to the field of modified carbon black production equipment technology, and in particular to a fine filtration device for modified carbon black production. Background Technology

[0002] Carbon black is an amorphous carbon, appearing as a lightweight, loose, and extremely fine black powder with a huge specific surface area. Its typical production process involves using carbonaceous materials such as coal tar and anthracene oil as raw materials. Under conditions of insufficient air, the mixture undergoes a complex fuel combustion and hydrocarbon thermal decomposition process in a reactor. The reaction zone temperature reaches 1600–1950℃, generating high-temperature carbon black flue gas containing carbon black, N2, H2, CO, CO2, and other components. To terminate the carbon black reaction and control the product structure, atomized water is directly injected into the high-temperature flue gas in the quenching section, utilizing the heat absorption of water vaporization to achieve rapid cooling. After the flue gas temperature rapidly drops to approximately 260℃, it enters a bag filter for gas-solid separation. The separated carbon black undergoes granulation and drying processes before entering a product storage tank, while the exhaust gas is sent to a power generation workshop for recycling.

[0003] However, the above process presents the following significant technical problems in engineering practice: During filtration, carbon black readily adheres to the surface of the filter bag. This adhesion not only makes cleaning the filter bag difficult but also forms a dense initial cake layer on the filter bag surface. When the carbon black concentration in the flue gas is high, the cake layer thickens rapidly and the porosity decreases, resulting in a significant increase in filtration resistance (pressure difference). Increased resistance directly leads to increased system energy consumption, heavier fan load, and may even affect the normal operation of downstream processes. Summary of the Invention

[0004] The purpose of this invention is to provide a fine filtration device for the production of modified carbon black, thereby solving the technical problems mentioned in the background section.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention discloses a fine filtration device for modified carbon black production, comprising a filter box, a conical hopper fixedly disposed at the bottom of the filter box, a discharge valve fixedly disposed at the bottom of the hopper, a flue gas inlet fixedly disposed on the side of the filter box near the hopper and connected thereto, a horizontal fixed tube sheet fixedly disposed inside the filter box near the upper part, a plurality of through holes evenly distributed in a rectangular array on the fixed tube sheet, filter components being inserted into each through hole of the fixed tube sheet, an exhaust pipe disposed on the side wall of the filter box above the fixed tube sheet, and a vibration component and a blowing component disposed on the filter box for removing the outer layer of carbon black from the plurality of filter components.

[0006] Furthermore, each of the filter components includes an inner sleeve disposed in the corresponding through hole of the fixed tube sheet. A bag cage is fixedly disposed at the bottom of the inner sleeve, and a filter bag is sleeved on the outside of the bag cage. The upper end of the filter bag is fixedly connected to the lower end of the inner sleeve by a hoop, and the bottom of the filter bag is a closed structure.

[0007] Furthermore, the vibration assembly includes two symmetrically rotatably mounted drive shafts on the side wall of the filter housing. One end of each drive shaft is connected to the output end of two reducers fixedly mounted on the outer wall of the filter housing. The input ends of the two reducers are respectively equipped with drive motors. The other ends of the two drive shafts are located inside the filter housing and are fitted with eccentric grooved wheels. Each eccentric grooved wheel has a connecting ring rotatably mounted on its outer circumference. The outer circumference of each connecting ring is hinged to one end of a connecting rod. The other end of each connecting rod is hinged to the upper two ends of a movable perforated plate vertically sliding inside the filter housing. The movable perforated plate has through holes that fit with the outer circumference of each inner sleeve. Each inner sleeve has a limiting protrusion ring on its outer circumferential wall near the upper and lower surfaces of the movable perforated plate. The outer diameter of the limiting protrusion ring is larger than the inner diameter of the through hole on the movable perforated plate.

[0008] Furthermore, the inner wall of the filter box is symmetrically fixedly provided with two horizontal plates below the movable tube sheet. Each horizontal plate has a through hole. The lower ends of the movable tube sheet are fixedly provided with two vertical slide rods that slide in cooperation with the through holes on the corresponding horizontal plates. Each slide rod is fitted with a spring at the part between the movable tube sheet and the horizontal plate. The lower end of each slide rod is fixedly provided with a limiting head. The diameter of the limiting head is larger than the inner diameter of the through hole on the horizontal plate.

[0009] Furthermore, each through hole of the fixed plate is rotatably provided with an outer sleeve, and a rotary transmission mechanism for causing the multiple outer sleeves to rotate is provided between one of the drive shafts and each of the outer sleeves; each inner sleeve is slidably engaged with the corresponding outer sleeve, and multiple transmission grooves are evenly provided circumferentially on the inner peripheral wall of each outer sleeve, and multiple elongated transmission bosses that are adapted to each transmission groove are provided on the outer peripheral wall of each inner sleeve.

[0010] Furthermore, the rotary transmission mechanism includes a driving bevel gear sleeved on one of the driving shafts and a driven shaft rotatably disposed at one end of the fixed plate. The lower end of the driven shaft is provided with a driven bevel gear that meshes with the driving bevel gear, and the upper end of the driven shaft is provided with a driving spur gear. The upper end of each of the outer sleeves is respectively fitted with a driven spur gear. The driven spur gear on the outermost outer sleeve meshes with the driving spur gear, and the two driven spur gears on each of the two adjacent outer sleeves mesh with each other.

[0011] Furthermore, the blowing assembly includes an air supply pipe fixedly installed on one side of the upper part of the filter box. One end of the air supply pipe located outside the filter box is connected to the output end of an air compressor fixedly installed outside the filter box. The other end of the air supply pipe located inside the filter box is connected to a blowing pipe horizontally fixedly installed below the top plate of the filter box. At the bottom of the blowing pipe, nozzles are fixedly installed and connected to each of the filter assemblies at positions corresponding to them.

[0012] Furthermore, a pulse valve is installed on the air supply pipe.

[0013] Furthermore, the bottom of the blowpipe is covered with a Venturi tube on the outside of each nozzle, and the lower end diameter of each Venturi tube is smaller than the upper end diameter.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention integrates three cleaning methods: vertical vibration, horizontal rotation, and pulse jet cleaning. Vibration disrupts the overall structure of the filter cake layer, rotation generates centrifugal force to detach surface particles, and pulse jet cleaning impacts the filter bag from the inside, causing it to expand and deform. The three methods work synergistically to effectively remove carbon black particles from the surface of the filter bag, preventing the formation of a dense powder cake layer and thus improving filtration efficiency. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation of the filter assembly of the present invention; Figure 3 This is a schematic diagram of the vibration component (single-sided) structure of the present invention; Figure 4 This is a schematic diagram of the drive shaft end connection component of the present invention; Figure 5 This is a cross-sectional view of the inner sleeve and outer sleeve of the present invention. Figure 6 This is a partial schematic diagram of the jet pipe of the present invention; Explanation of reference numerals in the attached drawings: 1. Filter box; 2. Collection hopper; 3. Discharge valve; 4. Flue gas inlet; 5. Fixed tube sheet; 6. Exhaust pipe; 7. Inner sleeve; 8. Bag cage; 9. Filter bag; 10. Hoop; 11. Drive shaft; 12. Reducer; 13. Drive motor; 14. Eccentric grooved wheel; 15. Connecting ring; 16. Connecting rod; 17. Movable tube sheet; 18. Limiting protrusion; 19. Horizontal plate; 20. Slide rod; 21. Spring; 22. Limiting head; 23. Outer sleeve; 24. Transmission groove; 25. Transmission boss; 26. Driven bevel gear; 27. Driven shaft; 28. Driven bevel gear; 29. ​​Driven spur gear; 30. Driven spur gear; 31. Air supply pipe; 32. Air compressor; 33. Blowpipe; 34. Nozzle; 35. Venturi tube; 36. Pulse valve. Detailed Implementation

[0017] like Figures 1-6 As shown, a fine filtration device for modified carbon black production includes a filter box 1, and a cone-shaped collection hopper 2 is fixedly installed at the bottom of the filter box 1. The collection hopper 2 and the filter box 1 are integrally connected structures.

[0018] A discharge valve 3 is fixedly installed at the bottom of the collection hopper 2. A flue gas inlet 4, connected to the collection hopper 2, is fixedly installed on the side of the filter box 1 near the side. A horizontal fixed tube sheet 5 is fixedly installed inside the filter box 1 near the upper part. Multiple through holes are evenly opened in a rectangular array on the fixed tube sheet 5, and filter components are inserted into each through hole. An exhaust pipe 6 is installed on the side wall of the filter box 1 above the fixed tube sheet 5.

[0019] When the carbon black flue gas is being filtered normally, the carbon black flue gas enters the filter box 1 through the flue gas inlet 4. The gas in the carbon black flue gas will penetrate each filter component and flow to the top of the fixed tube sheet 5 and be discharged through the exhaust pipe 6. The carbon black particles in the carbon black flue gas will be intercepted by the filter components and settle into the collection hopper 2 at the bottom of the filter box 1. The discharge valve 3 can be opened periodically to discharge the carbon black collected in the collection hopper 2 to the next process.

[0020] In this embodiment, each of the filter components is a filter bag structure, specifically including an inner sleeve 7 disposed within the corresponding through hole of the fixed tube sheet 5. A bag cage 8 is fixedly disposed at the bottom of the inner sleeve 7, and a filter bag 9 is fitted onto the outside of the bag cage 8. The upper end of the filter bag 9 is fixedly connected to the lower part of the outer periphery of the inner sleeve 7 by a hoop 10, and the bottom of the filter bag 9 is a closed structure. Thus, when filtering carbon black flue gas, the filter bag 9 can intercept carbon black particles, while the gas passes through the filter bag 9, enters the area above the fixed tube sheet 5 through the inner sleeve 7, and is discharged through the exhaust pipe 6.

[0021] To prevent excessive accumulation of carbon black particles on the filter bag 9, the filter housing 1 is equipped with a vibration assembly and a jetting assembly for removing carbon black from the outer layer of the filter bags 9 of the multiple filter components.

[0022] Specifically, the vibration assembly includes two symmetrically rotatably mounted drive shafts 11 on the side wall of the filter housing 1. One end of each drive shaft 11 is connected to the output end of two reducers 12 fixedly mounted on the outer wall of the filter housing 1. The reducers 12 are specifically worm gear reducers, and drive motors 13 are respectively installed at the input ends of the two reducers 12. The other end of each drive shaft 11 is located inside the filter housing 1 and is fitted with an eccentric grooved wheel 14. A connecting ring 15 is rotatably fitted in the outer groove of each eccentric grooved wheel 14. The outer circumference of each connecting ring 15 is hinged to one end of a connecting rod 16. The other ends of the two connecting rods 16 are hinged to the upper ends of a movable perforated plate 17 that is vertically slidably disposed inside the filter housing 1. The movable plate 17 has through holes that fit with the outer periphery of each inner sleeve 7. Each inner sleeve 7 has a limiting protrusion ring 18 on its outer periphery near the upper and lower surfaces of the movable plate 17. The outer diameter of the limiting protrusion ring 18 is larger than the inner diameter of the through hole on the movable plate 17. Thus, the two limiting protrusion rings 18 enable each inner sleeve 7 to move up and down together with the movable plate 17.

[0023] When the two drive motors 13 are started, the two drive shafts 11 rotate synchronously. Through two sets of reciprocating transmission structures composed of eccentric grooved wheels 14, connecting collars 15, and connecting rods 16, the movable tube sheet 17 can drive multiple inner sleeves 7 and filter components to perform linear reciprocating motion in the vertical direction, thereby generating a vibration effect on the filter bags 9 on the filter components, which helps to shake off the carbon black particles on the surface of the filter bags 9.

[0024] In this embodiment, the inner wall of the filter box 1 is symmetrically fixedly provided with two horizontal plates 19 below the movable flower plate 17. Each horizontal plate 19 is provided with a through hole. Two vertical slide rods 20 are fixedly provided at both ends of the lower part of the movable flower plate 17 and slide in cooperation with the through holes on the corresponding ends of the horizontal plates 19. Each slide rod 20 is fitted with a spring 21 at the part between the movable flower plate 17 and the horizontal plate 19. A limit head 22 is fixedly provided at the lower end of each slide rod 20. The diameter of the limit head 22 is larger than the inner diameter of the through hole on the horizontal plate 19.

[0025] In addition, each through hole of the fixed flower plate 5 is rotatably provided with an outer sleeve 23, and a rotary transmission mechanism for causing the multiple outer sleeves 23 to rotate is provided between one of the drive shafts 11 and each of the outer sleeves 23. Each inner sleeve 7 is slidably engaged with the corresponding outer sleeve 23, and multiple transmission grooves 24 are evenly formed along the circumferential direction on the inner peripheral wall of each outer sleeve 23. Multiple elongated transmission bosses 25 are provided on the outer peripheral wall of each inner sleeve 7, which are adapted to each of the transmission grooves 24. With the above settings, while ensuring that each inner sleeve 7 moves in a vertical reciprocating motion together with the movable tube sheet 17, the drive shaft 11 causes each outer sleeve 23 to rotate through the rotary transmission mechanism. Since each transmission groove 24 on the outer sleeve 23 engages with the transmission boss 25 on the inner sleeve 7, the outer sleeve 23 can drive the inner sleeve 7 and the entire filter assembly to rotate. When the filter bag 9 rotates, the carbon black particles attached to its surface will be subjected to centrifugal force, further promoting the carbon black particles to detach from the surface of the filter bag 9.

[0026] Specifically, the rotary transmission mechanism includes a driving bevel gear 26 mounted on one of the driving shafts 11 and a driven shaft 27 rotatably mounted on one end of the fixed tube sheet 5. A driven bevel gear 28 meshing with the driving bevel gear 26 is mounted on the lower end of the driven shaft 27. A driving spur gear 29 is mounted on the upper end of the driven shaft 27, and a driven spur gear 30 is mounted on the upper end of each of the outer sleeves 23. The driven spur gear 30 on the outermost outer sleeve 23 meshes with the driving spur gear 29, and the two driven spur gears 30 on each of two adjacent outer sleeves 23 mesh with each other. When the driving shaft 11 rotates, the meshing transmission action of the driving bevel gear 26 and the driven bevel gear 28 causes the driven shaft 27 to drive the driving spur gear 29 to rotate, thereby causing each outer sleeve 23 to rotate through the meshing transmission action of the driving spur gear 29 and each driven spur gear 30.

[0027] In this embodiment, the jetting assembly includes an air supply pipe 31 fixedly installed on one side of the upper part of the filter housing 1. One end of the air supply pipe 31 located outside the filter housing 1 is connected to the output end of an air compressor 32 fixedly installed outside the filter housing 1, and a pulse valve 36 is installed on the air supply pipe 31. The other end of the air supply pipe 31 located inside the filter housing 1 is connected to a jetting pipe 33 horizontally fixedly installed below the top plate of the filter housing 1. At the bottom of the jetting pipe 33, nozzles 34 are fixedly installed and connected to each of the filter components at positions corresponding to them. Furthermore, a venturi tube 35 is provided on the outside of each nozzle 34 at the bottom of the jetting pipe 33, and the lower diameter of each venturi tube 35 is smaller than its upper diameter.

[0028] The specific operation of the jet-blowing assembly in this embodiment is as follows: the air compressor 32 generates high-pressure gas, which is delivered through the air supply pipe 31 and controlled by the pulse valve 36 to form an instantaneous pulse airflow. After the airflow enters the jet-blowing pipe 33, it is sprayed downwards at high speed through each nozzle 34. When the high-speed airflow passes through the venturi tube 35, the lower end of the tube has a smaller diameter than the upper end, which can further increase the airflow pressure. The high-speed airflow impacts the filter bag from the inside, causing the filter bag to expand and shake instantaneously, thereby peeling off the carbon black particles attached to the surface.

[0029] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A fine filtration device for modified carbon black production, characterized in that: The filter includes a filter housing, a conical hopper fixedly installed at the bottom of the filter housing, a discharge valve fixedly installed at the bottom of the hopper, a flue gas inlet fixedly installed on the side of the filter housing near the hopper and connected thereto, a horizontal fixed tube sheet fixedly installed inside the filter housing near the upper part, a plurality of through holes evenly opened in a rectangular array on the fixed tube sheet, filter components being inserted into each through hole of the fixed tube sheet, an exhaust pipe installed on the side wall of the filter housing above the fixed tube sheet, and a vibration component and a blowing component installed on the filter housing for removing the outer carbon black of the plurality of filter components.

2. The fine filtration device for modified carbon black production according to claim 1, characterized in that: Each of the filter components includes an inner sleeve disposed in the corresponding through hole of the fixed tube sheet. A bag cage is fixedly disposed at the bottom of the inner sleeve. A filter bag is sleeved on the outside of the bag cage. The upper end of the filter bag is fixedly connected to the lower end of the inner sleeve by a hoop. The bottom of the filter bag is a closed structure.

3. The fine filtration device for modified carbon black production according to claim 2, characterized in that: The vibration assembly includes two symmetrically rotatably mounted drive shafts on the side wall of the filter housing. One end of each drive shaft is connected to the output end of two reducers fixed on the outer wall of the filter housing. The input ends of the two reducers are respectively equipped with drive motors. The other ends of the two drive shafts are located inside the filter housing and are fitted with eccentric grooved wheels. Each eccentric grooved wheel has a connecting ring rotatably mounted on its outer circumference. The outer circumference of each connecting ring is hinged to one end of a connecting rod. The other end of each connecting rod is hinged to the upper two ends of a movable perforated plate that is vertically slidably mounted inside the filter housing. The movable perforated plate has through holes that fit with the outer circumference of each inner sleeve. Limiting protrusions are provided on the outer circumferential wall of each inner sleeve near the upper and lower surfaces of the movable perforated plate. The outer diameter of the limiting protrusions is larger than the inner diameter of the through holes on the movable perforated plate.

4. The fine filtration device for modified carbon black production according to claim 3, characterized in that: The inner wall of the filter box is symmetrically fixed with two horizontal plates below the movable tube sheet. Each horizontal plate has a through hole. At the lower ends of the movable tube sheet, two vertical sliding rods are fixedly installed, which slide in cooperation with the through holes on the corresponding horizontal plates. Each sliding rod is fitted with a spring at the part between the movable tube sheet and the horizontal plate. The lower end of each sliding rod is fixedly provided with a limiting head. The diameter of the limiting head is larger than the inner diameter of the through hole on the horizontal plate.

5. The fine filtration device for modified carbon black production according to claim 3, characterized in that: Each of the through holes of the fixed flower plate is rotatably provided with an outer sleeve, and a rotary transmission mechanism for causing the multiple outer sleeves to rotate is provided between one of the drive shafts and each of the outer sleeves; each of the inner sleeves is slidably engaged with the corresponding outer sleeve, and multiple transmission grooves are evenly provided circumferentially on the inner peripheral wall of each outer sleeve, and multiple elongated transmission bosses that are adapted to each of the transmission grooves are provided on the outer peripheral wall of each inner sleeve.

6. The fine filtration device for modified carbon black production according to claim 5, characterized in that: The rotary transmission mechanism includes a driving bevel gear sleeved on one of the driving shafts and a driven shaft rotatably disposed at one end of the fixed plate. The lower end of the driven shaft is provided with a driven bevel gear that meshes with the driving bevel gear, and the upper end of the driven shaft is provided with a driving spur gear. The upper end of each of the outer sleeves is respectively fitted with a driven spur gear. The driven spur gear on the outermost outer sleeve meshes with the driving spur gear, and the two driven spur gears on each of the two adjacent outer sleeves mesh with each other.

7. The fine filtration device for modified carbon black production according to claim 1, characterized in that: The blowing assembly includes an air supply pipe fixedly installed on one side of the upper part of the filter box. One end of the air supply pipe located outside the filter box is connected to the output end of an air compressor fixedly installed outside the filter box. The other end of the air supply pipe located inside the filter box is connected to a blowing pipe horizontally fixedly installed below the top plate of the filter box. At the bottom of the blowing pipe, nozzles are fixedly installed and connected to each of the filter assemblies at positions corresponding to them.

8. The fine filtration device for modified carbon black production according to claim 7, characterized in that: A pulse valve is installed on the gas supply pipe.

9. The fine filtration device for modified carbon black production according to claim 7, characterized in that: The bottom of the blowpipe is covered with a Venturi tube on the outside of each nozzle, and the lower end diameter of each Venturi tube is smaller than the upper end diameter.

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