Efficient and energy-saving activated carbon screening regeneration device

Abstract

The invention relates to the technical field of activated carbon recycling and regenerating devices, in particular to an efficient and energy-saving activated carbon screening and regenerating device which comprises an adsorption tower and a regenerating tower, and is characterized in that a tower bottom unloader for conveying activated carbon is mounted at the bottom of the adsorption tower; the outlet end of the tower bottom unloader is correspondingly provided with the inlet end of an activated carbon recycling and conveying device, the outlet end of the activated carbon recycling and conveying device is provided with a tower top unloader, and the outlet end of the tower top unloader is correspondingly provided with an activated carbon attachment removing device.

Description

Technical Field

[0001] The present invention relates to the technical field of activated carbon recovery and regeneration devices, in particular to an efficient and energy-saving activated carbon screening and regeneration device. Background Art

[0002] According to the design principle of the regeneration tower, the outlets of the preheating section and the cooling section are low-temperature areas. The high-concentration SO2 analysis gas released by the activated carbon at high temperature is extracted out of the tower by the downstream fan in the air extraction section. At the same time, the carbon distribution chamber and the discharging section of the regeneration tower adopt nitrogen gas sealing. If the analysis gas is not extracted cleanly and the nitrogen gas pressure and flow rate of the gas seal are insufficient, the analysis gas remaining in the regeneration tower may escape to the preheating section and the cooling section, condense when encountering low-temperature materials, generate liquid acid, and thus cause corrosion at the corresponding positions.

[0003] However, in actual production, there is basically no corrosion and damage in the preheating section and the cooling tower of the regeneration tower. However, the heat exchange tubes in the heating section of the regeneration tower are damaged within one year. This part is a high-temperature area of about 420°C, which is much higher than the acid dew point temperature. After analysis, the corroded tubes show obvious sulfur and chlorine corrosion characteristics, and the main components include sulfur, chlorine, iron, potassium, chromium, nickel, etc. There are also certain differences in the specific element composition of the inner and outer side adhesives. The characteristics of the inner side adhesive are high chlorine and potassium contents, and the outer side adhesive has high sulfur and oxygen contents. In addition, many shiny white spots are also found on the outside of many corroded tubes, mainly containing chlorine, potassium, iron, oxygen, etc. The surrounding black substances are mainly relatively single iron sulfide compounds. From the above analysis, it can be known that the main reason for the corroded tubes is high-chlorine ash.

[0004] The main source of high-chlorine ash is the dust particles in the flue gas attached to the surface of the activated carbon discharged from the adsorption tower. In previous projects, the activated carbon discharged from the adsorption tower was directly sent into the regeneration tower without treatment. In some projects, the chlorine ion content in the flue gas is high and the concentration of alkali metal dust is high, resulting in eutectic melting in the high-temperature section of the regeneration tower, causing problems such as plate clogging and damage of the regeneration tower, increased corresponding energy consumption, and poor regeneration efficiency, thereby affecting the normal operation of the regeneration tower. Therefore, the present application proposes an efficient and energy-saving activated carbon screening and regeneration device to solve the above problems. Summary of the Invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an efficient and energy-saving activated carbon screening and regeneration device. The technical solution for solving the problem is that it includes an adsorption tower and a regeneration tower. It is characterized in that a bottom discharger for transporting activated carbon is installed at the bottom of the adsorption tower. The outlet end of the bottom discharger is correspondingly arranged with the inlet end of the activated carbon recovery and transportation device. The outlet end of the activated carbon recovery and transportation device is installed with a top discharger, and the outlet end of the top discharger is correspondingly arranged with an activated carbon attachment removal device; The activated carbon attachment removal device includes a casing located above the top of the tower. Four elastic connectors arranged in a rectangular array are fixedly installed on the inner wall of the casing. The four elastic connectors are jointly fixedly connected to a sieve frame with an open left end. A sealing device is installed at the left end of the activated carbon. The sieve frame is connected to a discharging device that is used in cooperation with the sealing device. The lower end of the sieve frame is fixedly connected to a sieve mesh, and the aperture of the sieve mesh is smaller than the diameter of the activated carbon. A vertical shaft is rotatably connected to the lower end of the sieve frame. The vertical shaft is fixedly connected to an eccentric vibration block. A first motor for driving the vertical shaft is fixedly connected to the front end of the sieve frame. A material distribution device that cooperates with the top of the regeneration tower is arranged at the bottom of the casing.

[0006] Preferably, the activated carbon recovery and conveying device includes a vibrating screen for screening activated carbon arranged corresponding to the outlet end of the bottom discharger of the tower. A bottom storage bin for storing activated carbon is arranged corresponding to the vibrating screen. The feeding port of a bucket elevator is arranged corresponding to the storage bin. The outlet of the bucket elevator is arranged corresponding to a top storage bin for storing activated carbon. The outlet end of the top storage bin is fixedly communicated with the inlet end of the top discharger of the tower.

[0007] Preferably, each of the elastic connectors respectively includes a bottom support plate fixedly connected to the inner wall of the casing. The bottom support plate is fixedly connected to a bottom cylinder. An upper support plate fixedly connected to the sieve frame is arranged corresponding to the bottom support plate. The upper support plate is fixedly connected to a top cylinder corresponding to the bottom cylinder. The top cylinder and the bottom cylinder are jointly sleeved with a support spring.

[0008] Preferably, the sealing device includes a bracket fixedly connected to the sieve frame. The bracket is fixedly connected to an electric telescopic rod. The telescopic end of the electric telescopic rod is fixedly connected to a baffle for blocking the open left end of the sieve frame.

[0009] Preferably, the discharging device includes two mounting plates arranged opposite to each other on the left and right and respectively fixedly connected to the bracket and the sieve frame. A lead screw is rotatably connected to the opposite ends of the two mounting plates. A cross bar parallel to the lead screw is fixedly connected to the opposite ends of the two mounting plates. A driven rod threadedly connected to the lead screw is slidably connected to the cross bar. The driven rod is fixedly connected to a push plate that abuts against the sieve mesh. A second motor for driving the lead screw is fixedly connected to the right mounting plate. A protective cover for shielding the lead screw and the cross bar is fixedly connected to the opposite ends of the two mounting plates.

[0010] Preferably, the material distribution device includes a discharge channel located at the bottom of the housing. A partition is fixedly connected to the inner wall of the discharge channel. The partition divides the discharge channel into a first material channel and a second material channel. The first material channel is fixedly connected to the top inlet end of the regeneration tower. A screw conveyor is fixedly installed in the second channel. The upper end of the partition is rotatably connected to a longitudinal shaft. One end of a distribution plate is fixedly connected to the outer edge of the longitudinal shaft. A third motor for driving the longitudinal shaft is fixedly connected to the front end of the housing.

[0011] The beneficial effects of the present invention are as follows: When this application is in use, a bottom discharger is connected to the outlet end of the adsorption tower to convey the activated carbon discharged from the adsorption tower to the vibrating screen of the activated carbon recovery and conveying device for preliminary screening. After the activated carbon is preliminarily screened to remove most of the impurities, it is discharged from the vibrating screen to the bottom storage bin of the tower. Then, the bucket elevator conveys the activated carbon in the bottom storage bin of the tower to the top storage bin of the tower to facilitate its transportation to the regeneration tower for recycling. However, at this time, although the activated carbon in the bottom storage bin of the tower has been screened by the vibrating screen, high-chlorine ash still adheres to its surface, which is the main reason for the corrosion of the tubes in the regeneration tower. Therefore, this application is provided with an activated carbon attachment removal device at the top of the regeneration tower. By driving the longitudinal shaft to rotate by the first motor, the activated carbon entering the regeneration tower can be vibrationally screened by the eccentric vibration blocks on the longitudinal shaft, and the high-chlorine ash attached to the activated carbon can be efficiently removed. Furthermore, the corrosion of the tubes in the regeneration tower can be effectively avoided, the damage frequency of the regeneration tower can be reduced, and its service life can be extended. At the same time, after there is no corrosion inside the heat exchange tubes, the activated carbon flows smoothly, the regeneration effect is good, the efficiency is high, the fuel consumption for regeneration is reduced, the stability of the desulfurization and denitrification performance of the activated carbon is guaranteed, energy can be effectively saved, and the amount of dust with strong erosion ability in the flue gas after desorption is small, which plays a very good protective role for the equipment of the regeneration flue gas treatment system. Description of the Drawings

[0012] Figure 1 It is the full-section front view of the present invention.

[0013] Figure 2 It is the first-view partial three-dimensional sectional view of the present invention.

[0014] Figure 3 It is the enlarged view of area A in the first-view partial three-dimensional sectional view of the present invention.

[0015] Figure 4 It is the enlarged view of area B in the first-view partial three-dimensional sectional view of the present invention.

[0016] Figure 5 It is the second-view partial three-dimensional view of the present invention.

[0017] Figure 6 It is the third-view partial three-dimensional view of the present invention.

[0018] Figure 7 It is an enlarged view of area C in the third - perspective partial three - dimensional view of the present invention.

[0019] Figure 8 It is the fourth - perspective partial three - dimensional view of the present invention.

[0020] Figure 9 It is an enlarged view of area D in the fourth - perspective partial three - dimensional view of the present invention.

[0021] Reference numerals 1. Regeneration tower, 2. Bottom discharger, 3. Activated carbon recovery and conveying device, 4. Top discharger, 5. Activated carbon attachment removal device, 6. Housing, 7. Elastic connector, 8. Sieve frame, 9. Sealing device, 10. Discharging device, 11. Sieve mesh, 12. Vertical axis, 13. Eccentric vibration block, 14. First motor, 15. Material distribution device, 16. Vibration sieve, 17. Bottom storage bin, 18. Bucket elevator, 19. Top storage bin, 20. Bottom support plate, 21. Bottom cylinder, 22. Upper support plate, 23. Adsorption tower, 24. Top cylinder, 25. Support spring, 26. Bracket, 27. Electric telescopic rod, 28. Baffle, 29. Mounting plate, 30. Lead screw, 31. Cross bar, 32. Driven rod, 33. Pusher plate, 34. Second motor, 35. Protective cover, 36. Partition board, 37. First material channel, 38. Second material channel, 39. Screw conveyor, 40. Rotating shaft, 41. Distribution plate, 42. Third motor. Detailed implementation manners

[0022] The following further elaborates on the detailed implementation manners of the present invention in conjunction with the attached Figures 1-9 drawings.

[0023] Embodiment 1. The technical solution it solves is that when this application is in use, a bottom discharger 2 is connected to the outlet end of the adsorption tower 23 to convey the activated carbon discharged from the adsorption tower 23 to the vibrating screen 16 of the activated carbon recovery and conveying device 3 for preliminary screening. After the activated carbon is preliminarily screened by the vibrating screen 16 to remove most of the impurities, it is discharged from the vibrating screen 16 to the bottom storage bin 17. Then, the bucket elevator 18 conveys the activated carbon in the bottom storage bin 17 to the top storage bin 19 to facilitate its conveyance to the regeneration tower 1 for recycling. However, at this time, although the activated carbon in the bottom storage bin 17 has been screened by the vibrating screen 16, high-chlorine ash still adheres to its surface, which is the main reason for corroding the tubes in the regeneration tower 1. Therefore, this application arranges an activated carbon attachment removal device 5 at the top of the regeneration tower 1. By driving the vertical shaft 12 to rotate through the first motor 14, the eccentric vibration block 13 on the vertical shaft 12 can be used to vibrate and screen the activated carbon entering the regeneration tower 1, efficiently removing the high-chlorine ash adhering to the activated carbon, thereby effectively avoiding the corrosion of the tubes in the regeneration tower 1, reducing the damage frequency of the regeneration tower 1, and extending its service life. At the same time, after there is no corrosion inside the heat exchange tubes, the activated carbon flows smoothly, the regeneration effect is good, the efficiency is high, and the stability of the desulfurization and denitrification performance of the activated carbon is guaranteed, which can effectively save energy. The vibrating screen 16 in this application aims to separate the activated carbon, and a suitable existing technology can be selected. The structure of the vibrating screen 16 will not be specifically described in this application.

[0024] Embodiment 2. On the basis of Embodiment 1, during the use of this application, in order to recover the activated carbon discharged from the adsorption tower 23 to the regeneration tower 1 for reuse and avoid the high-chlorine ash adhering to the activated carbon from corroding the heat exchange tubes in the regeneration tower 1, a vibrating screen 16 is arranged at the bottom of the adsorption tower 23, and an activated carbon attachment removal device 5 is arranged at the top of the regeneration tower 1 to ensure that the recycling of the activated carbon will not damage the regeneration tower 1 and affect production.

[0025] Specifically, during the use of this application, the adsorption tower 23 discharges activated carbon to the vibrating screen 16 through the bottom discharger 2 for screening. The vibrating screen 16 separates the activated carbon and discharges it to the bottom storage bin 17 for storage to facilitate transfer. A bucket elevator 18 is correspondingly arranged at the bottom storage bin 17. Under the action of the bucket elevator 18, the activated carbon in the bottom storage bin 17 is lifted and conveyed to the top storage bin 19. The bottom of the top storage bin 19 is connected to the top discharger 4. Under the action of the top discharger 4, the activated carbon is conveyed and discharged onto the screen 11 of the activated carbon attachment removal device 5. In order to remove the high-chlorine ash attached to the activated carbon, an eccentric vibration block 13 connected to the vertical shaft 12 is arranged at the bottom of the screen frame 8. The first motor 14 is started to drive the vertical shaft 12 to rotate together with the eccentric vibration block 13. Since the eccentric vibration block 13 is eccentrically arranged relative to the vertical shaft 12, during its rotation, the screen frame 8 is caused to vibrate violently through the vertical shaft 12. Furthermore, the screen 11 installed at the lower end of the screen frame 8 will vibrate violently accordingly. As a result, the activated carbon on the screen 11 can be vibrated violently, and thus the high-chlorine ash attached to the activated carbon can be efficiently separated by vibration, ensuring the separation efficiency. The aperture of the screen 11 is smaller than the diameter of the activated carbon. Therefore, the high-chlorine ash can be separated downward through the screen 11, while the activated carbon with the high-chlorine ash removed remains on the screen 11.

[0026] Embodiment 3: On the basis of Embodiment 2, in order to ensure that the eccentric block causes the screen frame 8 to vibrate as the vertical shaft 12 rotates and does not cause excessive impact on other components, the outer wall of the screen frame 8 is connected to the machine shell 6 through four groups of elastic connectors 7. The elastic connector 7 is composed of a bottom support plate 20, a bottom cylinder 21, a top cylinder 24, an upper support plate 22, and a support spring 25, which can ensure the normal vibration of the screen frame 8 and provide buffering at the same time, thereby reducing the impact of vibration on other components.

[0027] Embodiment 4: On the basis of Embodiment 2, the discharge channel of this application is separated into a first material channel 37 and a second material channel 38 by a partition 36. While causing the vibrating screen 16 to vibrate through the movement of the eccentric block to separate the high-chlorine ash attached to the activated carbon, the third motor 42 of the material distribution device 15 should be started to reverse a set stroke. As a result, the third motor 42 can drive the rotating shaft 40 to reverse a corresponding stroke, so that the distribution plate 41 overlaps with the left inner wall of the machine shell 6, making the distribution plate 41 block the first material channel 37 of the discharge channel, while the second hopper is unobstructed. At this time, the blast furnace ash separated by the screen 11 can only enter the second material channel 38. When it is necessary to discharge the high-chlorine ash accumulated in the second material channel 38, the screw conveyor 39 can be started to discharge the high-chlorine ash in the second material channel 38 through the screw conveyor 39.

[0028] Embodiment 5. On the basis of Embodiment 4, after the vibration of the sieve frame 8 is caused by the movement of the eccentric block, so that the activated carbon on the sieve mesh 11 is separated from the high-chlorine ash, in order to facilitate the activated carbon on the sieve mesh 11 to enter the regeneration tower 1, a sealing device 9 and a discharging device 10 are provided. When transporting the activated carbon on the sieve mesh 11 to the regeneration tower 1, first start the third motor 42 to drive the rotating shaft 40 to rotate forward by a set stroke, and then the distribution plate 41 will rotate forward by a set stroke and overlap on the right inner wall of the machine shell 6. At this time, the second hopper is blocked, and the first material channel 37 is in an unobstructed state; then start the electric telescopic rod 27 on the bracket 26 in the sealing device 9 to contract. The contraction of the electric telescopic rod 27 will drive the baffle 28 to move to the left, and then the left end opening of the sieve frame 8 will lose its block; then start the second motor 34 on the mounting plate 29 in the discharging device 10 to rotate forward by a set stroke. Then the second motor 34 will drive the lead screw 30 to rotate forward by a corresponding stroke, and the forward rotation of the lead screw 30 will drive the driven rod 32 to move to the left along the cross bar 31 by a corresponding stroke. Then the push plate 33 fixedly connected to the driven rod 32 will also move to the left by the same stroke. Initially, the push plate 33 abuts against the right side wall of the sieve frame 8. The leftward movement of the push plate 33 will push the activated carbon on the sieve mesh 11 to move to the left and be discharged through the opening at the left end of the sieve hole. Then the activated carbon will fall downward through the left end of the sieve frame 8 and into the first material channel 37, and then can enter the regeneration tower 1 through the first material channel 37 for recycling. After discharging the activated carbon on the sieve mesh 11, the second motor 34 should be started to reverse and reset, and then the lead screw 30 can be driven to reverse. The reverse rotation of the lead screw 30 will drive the push plate 33 to move to the right and reset through the driven rod 32. Then start the electric telescopic rod 27 to extend and drive the baffle 28 to move to the right and reset to block the left end opening of the sieve frame 8 again, so as to facilitate the separation of high-chlorine ash from the activated carbon by the activated carbon attachment removal device 5 again. The provided protective cover 35 can effectively prevent foreign objects from invading the connection parts of the lead screw 30 and the cross bar 31 and the driven rod 32, ensuring the normal operation of the discharging device 10.

[0029] The recycling of activated carbon reduces the consumption of resources, is conducive to energy-saving production. At the same time, the activated carbon attachment removal device 5 can efficiently remove the high-chlorine ash attached to the activated carbon, effectively avoiding the corrosion of the tubes in the regeneration tower 1, reducing the damage frequency of the regeneration tower 1, and prolonging the service life. At the same time, after there is no corrosion inside the heat exchange tubes, the activated carbon flows smoothly, the regeneration effect is good and the efficiency is high. The stability of the desulfurization and denitrification performance of the activated carbon is guaranteed, and energy can be effectively saved.

Claims

1. An efficient and energy-saving activated carbon screening and regeneration device, comprising an adsorption tower (23) and a regeneration tower (1), characterized in that, At the bottom of the adsorption tower (23), a bottom discharger (2) for conveying activated carbon is installed. The outlet end of the bottom discharger (2) is correspondingly arranged with the inlet end of an activated carbon recovery and conveying device (3). The outlet end of the activated carbon recovery and conveying device (3) is installed with a top discharger (4), and the outlet end of the top discharger (4) is correspondingly arranged with an activated carbon attachment removing device (5). The activated carbon attachment removing device (5) includes a casing (6) located above the top of the regeneration tower (1). Four groups of elastic connectors (7) arranged in a rectangular array are fixedly installed on the inner wall of the casing (6). The four groups of elastic connectors (7) are jointly and fixedly connected with a sieve frame (8) with an open left end. A sealing device (9) is installed at the left end of the activated carbon. The sieve frame (8) is connected with a discharging device (10) used in cooperation with the sealing device (9). The lower end of the sieve frame (8) is fixedly connected with a sieve mesh (11), and the aperture of the sieve mesh (11) is smaller than the diameter of the activated carbon. The lower end of the sieve frame (8) is rotatably connected with a vertical shaft (12), and the vertical shaft (12) is fixedly connected with an eccentric vibration block (13). The front end of the sieve frame (8) is fixedly connected with a first motor (14) for driving the vertical shaft (12). A material distribution and conveying device (15) matching with the top of the regeneration tower (1) is arranged at the bottom of the casing (6).

2. The highly efficient and energy-saving activated carbon screening and regeneration device according to claim 1, characterized in that, The activated carbon recovery and conveying device (3) includes a vibrating screen (16) for screening activated carbon correspondingly arranged with the outlet end of the bottom discharger (2). The vibrating screen (16) is correspondingly arranged with a bottom storage bin (17) for storing activated carbon. The storage bin is correspondingly arranged with the feed inlet of a bucket elevator (18). The discharge outlet of the bucket elevator (18) is correspondingly arranged with a top storage bin (19) for storing activated carbon. The outlet end of the top storage bin (19) is fixedly communicated with the inlet end of the top discharger (4).

3. An efficient and energy-saving activated carbon screening and regeneration device according to claim 1, characterized in that, Each group of the elastic connectors (7) respectively includes a bottom support plate (20) fixedly connected with the inner wall of the casing (6). The bottom support plate (20) is fixedly connected with a bottom cylinder (21). The bottom support plate (20) is correspondingly arranged with an upper support plate (22) fixedly connected with the sieve frame (8). The upper support plate (22) is fixedly connected with a top cylinder (24) corresponding to the bottom cylinder (21). The top cylinder (24) and the bottom cylinder (21) are jointly sleeved with a support spring (25).

4. The highly efficient and energy-saving activated carbon screening and regeneration device according to claim 1, characterized in that, The sealing device (9) includes a bracket (26) fixedly connected with the sieve frame (8). The bracket (26) is fixedly connected with an electric telescopic rod (27). The telescopic end of the electric telescopic rod (27) is fixedly connected with a baffle (28) for blocking the open left end of the sieve frame (8).

5. The highly efficient and energy-saving activated carbon screening and regeneration device according to claim 4, characterized in that, The discharging device (10) includes two mounting plates (29) arranged opposite to each other left and right and fixedly connected to the bracket (26) and the sieve frame (8) respectively. A lead screw (30) is rotatably connected to the opposite ends of the two mounting plates (29). A cross bar (31) parallel to the lead screw (30) is fixedly connected to the opposite ends of the two mounting plates (29). A driven rod (32) threadedly connected to the lead screw (30) is slidably connected to the cross bar (31). A push plate (33) in contact with the sieve mesh (11) is fixedly connected to the driven rod (32). A second motor (34) for driving the lead screw (30) is fixedly connected to the right mounting plate (29). A protective cover (35) for shielding the lead screw (30) and the cross bar (31) is fixedly connected to the opposite ends of the two mounting plates (29).

6. The high-efficiency and energy-saving activated carbon screening and regeneration device according to claim 1, characterized in that, The material distribution device (15) includes a discharging channel located at the bottom of the machine shell (6). A partition plate (36) is fixedly connected to the inner wall of the discharging channel. The partition plate (36) divides the discharging channel into a first material channel (37) and a second material channel (38). The first material channel (37) is fixedly connected and communicated with the top inlet end of the regeneration tower (1). A screw conveyor (39) is fixedly installed in the second channel. One end of a distribution plate (41) is fixedly connected to the outer edge of a rotating shaft (40) longitudinally arranged and rotatably connected to the upper end of the partition plate (36). A third motor (42) for driving the rotating shaft (40) is fixedly connected to the front end of the machine shell (6).

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