Hazardous waste incineration fly ash heavy metal adsorption device

Abstract

The hazardous waste incineration fly ash heavy metal adsorption device comprises a spraying box, a drying box and an adsorption box, an air inlet and an air outlet are formed in the adsorption box, a partition plate is rotationally connected into the adsorption box, an adsorption area and a replacement area are defined by the upper end face and the lower end face of the partition plate and the inner side wall of the adsorption box correspondingly, and the air inlet and the air outlet are both located in the adsorption area; a plurality of adsorption plates are arranged in the adsorption area and the replacement area, the adsorption plates are detachably connected to the partition plate through connecting assemblies, and a replacement door is hinged to the replacement area, so that the adsorption process and the replacement process are synchronously carried out; and the operation of replacing the adsorption plate by an operator in the replacement area does not cause interruption of the heavy metal adsorption process, so that the continuity of the heavy metal adsorption process is ensured, and the method has the effect of improving the removal efficiency of the heavy metal in the incineration fly ash.

Description

Technical Field

[0001] The present application relates to the technical field of incineration fly ash treatment, and in particular to a heavy metal adsorption device for hazardous waste incineration fly ash. Background Art

[0002] Hazardous waste refers to solid waste that is included in the "National Hazardous Waste List" or is identified as having hazardous characteristics according to the national hazardous waste identification standards and identification methods. The disposal of hazardous waste will produce a large amount of hazardous waste incineration fly ash waste gas. The incineration fly ash waste gas mainly includes heavy metals, dioxins and various organic salts. Among them, heavy metals are a typical hazardous waste. When discharged into the external environment, they will cause potential harm to animals, plants and humans. Therefore, the incineration fly ash needs to be treated to remove heavy metals. The conventional treatment method uses adsorption plates such as activated carbon for adsorption, so that they can be captured, collected and effectively removed.

[0003] Chinese patent publication number CN113509808A discloses a heavy metal adsorption device for flue gas from hazardous waste incineration disposal, including a stirring and spraying unit, a drying and filtering unit, and an adsorption and disinfection unit. In the stirring and spraying unit, spray liquid is sprayed out from the spray liquid outlet of the spray disc, and the flue gas entering the stirring and spraying shell is fully contacted with the spray liquid under the stirring action of the stirring blade group, thereby removing smaller impurities such as mud, heavy metals, etc. in the flue gas. The flue gas after preliminary purification flows to the drying and filtering unit for secondary drying and re-filtration, and then the flue gas enters the adsorption and disinfection unit. Under the action of the primary adsorption plate, the secondary adsorption plate, and the ultraviolet lamp, the secondary adsorption of heavy metals in the flue gas and disinfection are achieved, so that the removal of heavy metals in the flue gas is more thorough and the purification effect is better.

[0004] When too much heavy metals are adsorbed, these active sites will be occupied in large quantities, causing the number of sites that can be used for subsequent adsorption of heavy metals to decrease sharply, resulting in a significant decrease in adsorption efficiency and an inability to effectively remove the remaining heavy metal pollutants.

[0005] However, after long-term use, the primary adsorption plate and the secondary adsorption plate of the adsorption disinfection unit adsorb too much heavy metals, so that a large number of active sites in the adsorption plate are occupied and adsorption saturation occurs. Therefore, the staff needs to replace the adsorption plate that is saturated with adsorption. However, replacing the adsorption plate will lead to the interruption of the heavy metal adsorption process, thereby extending the heavy metal removal time and reducing the heavy metal removal efficiency, which is obviously insufficient. Utility Model Content

[0006] In order to improve the removal efficiency of heavy metals in incineration fly ash, the present application provides a hazardous waste incineration fly ash heavy metal adsorption device.

[0007] The present application provides a hazardous waste incineration fly ash heavy metal adsorption device that adopts the following technical solutions:

[0008] A hazardous waste incineration fly ash heavy metal adsorption device comprises a spray box, a drying box and an adsorption box connected in sequence, the adsorption box is provided with an air inlet and an air outlet, the adsorption box is provided with a replacement motor, the output shaft of the replacement motor is provided with a partition, the partition is rotatably connected to the inside of the adsorption box, the outer peripheral side wall of the partition is tightly fitted with the inner wall of the adsorption box, the upper and lower end faces of the partition are respectively enclosed with the inner wall of the adsorption box to form an adsorption area and a replacement area, the air inlet and the air outlet are both located in the adsorption area, and a plurality of adsorption plates are provided in the adsorption area and the replacement area, and the plurality of adsorption plates are detachably connected to the partition through a connecting assembly, and a replacement door is hinged on the replacement area.

[0009] By adopting the above technical solution, under the blocking of the partition, the heavy metals in the incineration fly ash can only be adsorbed by the adsorption plate in the adsorption zone. When the adsorption plate in the adsorption zone is saturated with adsorption, the replacement motor starts and drives the partition to rotate 180 degrees. At this time, the unsaturated adsorption plate in the replacement zone moves to the adsorption zone for adsorption, and the adsorption plate saturated with adsorption in the adsorption zone enters the replacement zone. Then the worker opens the replacement door and replaces the saturated adsorption plate through the connecting component. After the replacement is completed, the replacement door is closed. This setting realizes the synchronization of the adsorption process and the replacement process. The operator's operation of replacing the adsorption plate in the replacement zone will not cause the interruption of the heavy metal adsorption process, thereby ensuring the continuity of the heavy metal adsorption process, shortening the heavy metal removal time, and improving the removal efficiency of heavy metals in incineration fly ash.

[0010] Optionally, the connecting assembly includes a mounting plate arranged on both sides of the adsorption plate, and a plurality of mounting posts are evenly and equidistantly arranged on the mounting plate, and a plug-in block is slidably connected to the plurality of mounting posts. The opposite end faces of the adsorption plate are provided with plug-in slots that are plugged into the plug-in blocks. Each of the mounting posts is provided with a spring, one end of the spring is provided on the mounting plate, and the other end is provided on the plug-in block. When the spring is in a natural state, the plug-in block is plugged into the plug-in slot.

[0011] By adopting the above technical solution, after opening the replacement door, the worker pulls the plug-in block to disengage it from the plug-in slot. At this time, the spring is compressed, and the worker pulls the adsorption plate out of the installation slot. After taking it out, the worker inserts the new adsorption plate into the installation slot. Then the worker releases the force on the plug-in block, and the spring resets to push the plug-in block into the inside of the plug-in slot. At this time, the adsorption plate is installed on the partition under the plug-in cooperation of the two plug-in blocks and the plug-in slot. The setting of the connecting component realizes the rapid replacement of the adsorption plate on the partition, and improves the stability of the adsorption plate on the partition during the rotation of the partition, reduces the possibility of the adsorption plate detaching from the partition, and ensures the smooth progress of the adsorption plate replacement operation.

[0012] Optionally, a stirring assembly is provided in the spray box, and the stirring assembly includes a main stirring shaft and multiple auxiliary stirring shafts rotatably connected to the inside of the spray box, the main stirring shaft is arranged at the axis center of the spray box, and the multiple auxiliary stirring shafts are evenly arranged circumferentially on the outer surface of the main stirring shaft, and the main stirring shaft and the auxiliary stirring shaft are both provided with multiple stirring blades, and the adjacent stirring blades are staggered. A rotating assembly for driving the main stirring shaft and the auxiliary stirring shaft to rotate synchronously is provided in the spray box.

[0013] By adopting the above technical solution, when the incineration fly ash enters the spray box, the rotating component drives the main stirring shaft and multiple auxiliary stirring shafts to rotate synchronously. The rotation of the main stirring shaft and the auxiliary stirring shaft drives the stirring blades to rotate in the spray box. During the rotation process, the laminar flow state of the incineration fly ash is broken, and the incineration fly ash is fully dispersed into the interior of the spray box and fully contacts with the spray liquid. When in contact with the spray liquid, it absorbs some heavy metal impurities in the incineration fly ash. The setting of the stirring component improves the mixing effect of the incineration fly ash and the spray liquid, thereby increasing the removal rate of heavy metals per unit time, thereby further improving the removal efficiency of heavy metals.

[0014] Optionally, the rotating assembly includes a driving gear arranged on the main stirring shaft, a driven gear meshing with the driving gear is arranged on the secondary stirring shaft, the driving gear and the driven gear are rotatably connected to the top wall of the spray box, and a ring gear is arranged on the inner circumferential side wall of the spray box, and the ring gear is meshed with multiple driven gears.

[0015] By adopting the above technical solution, after the stirring motor is started, it drives the main stirring shaft to rotate, the main stirring shaft drives the driving gear to rotate, the driving gear drives multiple meshing driven gears to rotate, and the driven gear drives multiple auxiliary stirring shafts to rotate synchronously. At the same time, under the setting of the ring gear, the driven gear will move along the circumference of the ring gear during the rotation process, and the movement of the driven gear drives the multiple auxiliary stirring shafts to move along the inner circumferential side wall of the spray box, realizing all-round stirring of the incineration fly ash inside the spray box during the movement. The setting of the rotating component further expands the range of action of the mixing rod, thereby further increasing the contact area between the incineration fly ash and the spray liquid, and further improving the removal effect of heavy metals.

[0016] Optionally, an air inlet pipe is connected to the spray box, and an annular groove connected to the air inlet pipe is provided in the side wall of the spray box. An arc-shaped baffle is slidably provided in the annular groove, and the arc-shaped baffle blocks the annular groove. A plurality of air outlets are evenly spaced on the arc-shaped baffle, and the air outlet directions of the plurality of air outlets are set toward the stirring assembly. A connecting rod is provided on the main stirring shaft, and the end of the connecting rod away from the main stirring shaft is connected to the arc-shaped baffle.

[0017] By adopting the above technical solution, the incineration fly ash enters the annular groove through the air inlet pipe, and under the cover of the arc-shaped baffle, the incineration fly ash flows along the inside of the annular groove. At the same time, when the stirring motor drives the main stirring shaft to rotate, the main stirring shaft drives the connecting rod to rotate. During the rotation of the connecting rod, the arc-shaped baffle is pulled to slide in the annular groove. During the movement of the arc-shaped baffle, the air outlet is moved along the inner peripheral side wall of the spray box. This arrangement realizes the ejection of incineration fly ash from all directions of the inner peripheral side wall of the spray box, improves the uniformity of the incineration fly ash entering the spray box, and enables the incineration fly ash to be more fully in contact with the spray liquid, thereby improving the removal efficiency of heavy metals.

[0018] Optionally, the opposite end surfaces of the arc-shaped baffle are provided with guide strips, and the inner side walls opposite to the annular groove are provided with guide grooves that slide in cooperation with the guide strips.

[0019] By adopting the above technical solution, the setting of the guide strips and guide grooves can make the movement of the arc baffle in the annular groove smoother, ensuring the uniformity of the incineration exhaust gas entering the spray box. At the same time, the setting of the guide strips and guide grooves can improve the sealing between the arc baffle and the annular groove, reducing the possibility of leakage of intake air through the gap between the arc baffle and the annular groove.

[0020] Optionally, a viewing window is provided on the spray box.

[0021] By adopting the above technical solution, the setting of the viewing window makes it convenient for workers to observe the spraying conditions inside the spray box, and when a fault occurs inside the spray box, it is convenient for workers to carry out timely maintenance.

[0022] Optionally, the inner side walls of the spray box, the drying box and the adsorption box are all coated with a polytetrafluoroethylene coating.

[0023] By adopting the above technical solution, the polytetrafluoroethylene coating is a coating with excellent corrosion resistance, which can enable the spray box, drying box and adsorption box to maintain stable physical properties during long-term use, reduce deformation, cracking or leakage caused by corrosion inside the box, and extend the service life of the device.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The present application sets a partition and a connecting assembly. Under the blocking of the partition, heavy metals in the incineration fly ash can only be adsorbed by the adsorption plates in the adsorption zone. When the adsorption plates in the adsorption zone are saturated, the partition rotates 180 degrees to exchange the adsorption plates in the replacement zone and the adsorption zone. The worker opens the replacement door and replaces the saturated adsorption plate through the connecting assembly. After the replacement is completed, the replacement door is closed. This arrangement realizes the simultaneous execution of the adsorption process and the replacement process. The operator's operation of replacing the adsorption plate in the replacement zone will not interrupt the heavy metal adsorption process, thereby ensuring the continuity of the heavy metal adsorption process, shortening the heavy metal removal time, and improving the removal efficiency of heavy metals in incineration fly ash.

[0026] 2. This application provides a connecting rod and an arc-shaped baffle. During the rotation of the connecting rod, the arc-shaped baffle is pulled to slide in the annular groove. During the movement of the arc-shaped baffle, the air outlet moves along the inner peripheral side wall of the spray box. This arrangement enables the incineration fly ash to be ejected from the inner peripheral side wall of the spray box in all directions, improves the uniformity of the incineration fly ash entering the spray box, and at the same time enables the incineration fly ash to come into more complete contact with the spray liquid, thereby improving the removal efficiency of heavy metals. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of this application.

[0028] Figure 2 It is a cross-sectional view of the adsorption box in the embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view of the spray box in the embodiment of the present application.

[0030] Figure 4 It is a structural schematic diagram of the rotating assembly in an embodiment of the present application.

[0031] Explanation of the accompanying symbols: 1. Spray box; 101. Visual window; 102. Air inlet pipe; 2. Drying box; 3. Adsorption box; 31. Air inlet; 32. Air outlet; 33. Adsorption area; 34. Replacement area; 341. Replacement door; 4. Adsorption plate; 41. Plug-in slot; 5. Partition; 51. Replacement motor; 6. Connecting assembly; 61. Mounting plate; 62. Mounting column; 63. Plug-in block; 64. Spring; 7. Stirring assembly; 71. Main stirring shaft; 72. Auxiliary stirring shaft; 73. Stirring blade; 8. Rotating assembly; 81. Stirring motor; 82. Driving gear; 83. Driven gear; 84. Ring gear; 9. Ring groove; 91. Guide groove; 10. Arc baffle; 1001. Guide strip; 1002. Air outlet; 11. Connecting rod. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The embodiment of the present application discloses a heavy metal adsorption device for hazardous waste incineration fly ash.

[0034] Reference Figure 1 and Figure 2 A device for adsorbing heavy metals from fly ash from incineration of hazardous waste includes a spray box 1, a drying box 2 and an adsorption box 3 connected in sequence. The inner side walls of the spray box 1, the drying box 2 and the adsorption box 3 are all coated with a polytetrafluoroethylene coating. A visual window 101 is provided on the outer surface of the spray box 1 so that workers can observe the working conditions in the spray box 1. An air inlet pipe 102 is installed on one side of the spray box 1. A spray assembly (not shown in the figure) is provided in the spray box 1 to spray the incineration fly ash gas. A drying assembly (not shown in the figure) is provided in the drying box 2 to dry the incineration fly ash. An air inlet 31 and an air outlet 32 ​​are provided at opposite ends of the adsorption box 3. The air inlet 31 is connected to the air outlet end of the drying box 2 through a connecting pipe, and the air outlet 32 ​​is connected to the outside atmosphere. A plurality of adsorption plates 4 for adsorbing heavy metals in the incineration fly ash are provided in the adsorption box 3.

[0035] The gas carrying the incineration fly ash enters the interior of the spray box 1 through the air inlet pipe 102. After the spray liquid sprayed by the spray assembly comes into contact with the gas, the small particles of heavy metal impurities in the gas are captured by the spray liquid. The incineration fly ash gas that has undergone preliminary filtration then enters the drying box 2 for drying, and after drying, enters the adsorption box 3. Under the multiple adsorption effects of multiple adsorption plates 4, the heavy metals in the incineration fly ash are further removed, and then the incineration fly ash gas with heavy metals removed is discharged through the outlet 32.

[0036] Reference Figure 1 and Figure 2A partition 5 is rotatably connected in the adsorption box 3. When the axis of the partition 5 is parallel to the length direction of the adsorption box 3, the outer side wall of the partition 5 is tightly fitted with the inner wall of the adsorption box 3. A replacement motor 51 is installed on the outer side wall of the adsorption box 3 to drive the partition 5 to rotate 180° each time. The upper and lower end faces of the partition 5 are respectively enclosed with the inner wall of the adsorption box 3 to form an adsorption area 33 and a replacement area 34. The air inlet 31 and the air outlet 32 ​​are opened on the side wall of the adsorption box 3 located in the adsorption area 33, and a replacement door 341 is hinged on the outer side wall of the replacement area 34. A plurality of adsorption plates 4 are provided in the adsorption area 33 and the replacement area 34. The plurality of adsorption plates 4 are arranged in sequence along the moving direction of the incineration fly ash gas, and the plurality of adsorption plates 4 are detachably connected to the upper and lower end faces of the partition 5 through a connecting component 6.

[0037] Reference Figure 1 and Figure 2 The connecting component 6 includes mounting plates 61 arranged on both sides of the adsorption plate 4. The mounting plates 61 are fixedly connected to the partition 5. Each mounting plate 61 is fixedly connected to a plurality of mounting posts 62. The plurality of mounting posts 62 are evenly distributed along the length direction of the mounting plate 61. Each mounting plate 61 is slidably connected to a plug-in block 63, and the plug-in block 63 slides with the mounting post 62. The opposite end faces of each adsorption plate 4 are provided with a plug-in slot 41 for plugging with the plug-in block 63. Each mounting post 62 is sleeved with a spring 64, one end of the spring 64 is fixedly connected to the mounting plate 61, and the other end is fixedly connected to the plug-in block 63. When the spring 64 is in a natural state, the plug-in block 63 is plugged into the plug-in slot 41.

[0038] Under the blocking of the partition 5, the incineration fly ash gas can only be adsorbed by the multiple adsorption plates 4 in the adsorption area 33. When the adsorption plate 4 in the adsorption area 33 is saturated with adsorption, the replacement motor 51 is started and drives the partition 5 to rotate 180 degrees. At this time, the unsaturated adsorption plate 4 in the replacement area 34 moves to the adsorption area 33 for adsorption. The saturated adsorption plate 4 in the adsorption area 33 enters the replacement area 34. The worker opens the replacement door 341 and pulls the plug block 63 to disengage it from the plug slot 41. At this time, the spring 64 is compressed, and the worker pulls the adsorption plate 4 out of the installation slot. After taking out, the worker inserts a new adsorption plate 4 into the installation slot. Slot, then the worker releases the force on the plug-in block 63, and the spring 64 resets to push the plug-in block 63 into the plug-in slot 41. At this time, the adsorption plate 4 is installed on the partition 5 under the plug-in cooperation of the two plug-in blocks 63 and the plug-in slot 41. After the installation is completed, the worker closes the replacement door 341. This setting realizes the synchronization of the adsorption process and the replacement process. The operator's operation of replacing the adsorption plate 4 in the replacement area 34 will not cause the interruption of the heavy metal adsorption process, thereby ensuring the continuity of the heavy metal adsorption process, thereby shortening the removal time of heavy metals and improving the removal efficiency of heavy metals in incineration fly ash.

[0039] Reference Figure 3 and Figure 4 In order to improve the contact effect between the incineration fly ash gas and the spray liquid, a stirring assembly 7 is provided in the spray box 1. The stirring assembly 7 includes a main stirring shaft 71 and a plurality of auxiliary stirring shafts 72 rotatably connected to the spray box 1. In this embodiment, the number of auxiliary stirring shafts 72 is two, wherein the main stirring shaft 71 is arranged at the center position of the spray box 1, and the two auxiliary stirring shafts 72 are equidistantly distributed on the outer peripheral side of the main stirring shaft 71. A plurality of stirring blades 73 are fixedly connected to the main stirring shaft 71 and the auxiliary stirring shaft 72, and adjacent stirring blades 73 are staggered. A rotating assembly 8 is provided in the spray box 1.

[0040] Reference Figure 3 and Figure 4 The rotating assembly 8 includes a stirring motor 81 fixedly mounted on the top surface of the spray box 1, the output shaft of the stirring motor 81 is coaxially fixedly connected to the main stirring shaft 71, and a driving gear 82 is fixedly connected to the side of the main stirring shaft 71 close to the inner top wall of the spray box 1. The driving gear 82 is meshed with a driven gear 83 corresponding to the two auxiliary stirring shafts 72 one by one. The two driven gears 83 are respectively fixedly connected to the corresponding auxiliary stirring shafts 72, and a gear ring 84 that meshes with the two driven gears 83 is fixedly connected to the inner circumferential side wall of the spray box 1. One end of the auxiliary stirring shaft 72 close to the inner top wall of the spray box 1 is fixedly connected to a support block (not shown in the figure). An annular cavity (not shown in the figure) that slides with the support block is opened on the inner top wall of the spray box 1, and the cross-section of the support block is T-shaped.

[0041] After the incineration fly ash gas enters the spray box 1 through the air inlet pipe 102, the stirring motor 81 is started, and the stirring motor 81 drives the main stirring shaft 71 to rotate, and the main stirring shaft 71 drives the driving gear 82 to rotate, and the driving gear 82 drives the meshing multiple driven gears 83 to rotate, and the driven gear 83 drives the multiple auxiliary stirring shafts 72 to rotate synchronously. At the same time, under the setting of the ring gear 84, the driven gear 83 will move circumferentially along the ring gear 84 during the rotation process, and the driven gear 83 moves and drives the multiple auxiliary stirring shafts 72 along the spray box 1. The inner peripheral side wall moves. During the movement, the stirring blades 73 rotating around the auxiliary stirring shaft 72 stir the gas inside the spray box 1 in all directions. The laminar flow state of the incineration fly ash is broken, and the incineration fly ash is fully dispersed into the interior of the spray box 1 and fully contacts with the spray liquid. When contacting with the spray liquid, some heavy metal impurities in the incineration fly ash are absorbed. This arrangement improves the mixing effect of the incineration fly ash and the spray liquid, thereby increasing the removal rate of heavy metals per unit time, thereby further improving the removal efficiency of heavy metals.

[0042] Reference Figure 3 and Figure 4A ring groove 9 connected to the air inlet pipe 102 is provided in the side wall of the spray box 1, and an arc-shaped baffle 10 is slidably connected in the ring groove 9. The arc-shaped baffle 10 blocks the ring groove 9, and the opposite ends of the arc-shaped baffle 10 are fixedly connected with guide bars 1001. A guide groove 91 slidingly matched with the guide bar 1001 is provided on the inner side wall opposite to the ring groove 9. A plurality of air outlets 1002 are evenly and equidistantly provided on the arc-shaped baffle 10, and the air outlet direction of the air outlet 1002 is set toward the main stirring shaft 71. A plurality of connecting rods 11 are fixedly connected to the main stirring shaft 71. In this embodiment, the number of connecting rods 11 is two, and the ends of the two connecting rods 11 away from the main stirring shaft 71 are fixedly connected to the arc-shaped baffle 10.

[0043] The incineration fly ash enters the annular groove 9 through the air inlet pipe 102. Under the cover of the arc-shaped baffle 10, the incineration fly ash flows along the inside of the annular groove 9. At the same time, when the stirring motor 81 drives the main stirring shaft 71 to rotate, the main stirring shaft 71 drives the connecting rod 11 to rotate. During the rotation of the connecting rod 11, the arc-shaped baffle 10 is pulled to slide in the annular groove 9. During the movement of the arc-shaped baffle 10, the air outlet 1002 is moved along the inner peripheral side wall of the spray box 1. This arrangement realizes the ejection of incineration fly ash from all directions of the inner peripheral side wall of the spray box 1, improves the uniformity of the incineration fly ash entering the spray box 1, and enables the incineration fly ash to be more fully in contact with the spray liquid, thereby improving the removal efficiency of heavy metals.

[0044] The implementation principle of the hazardous waste incineration fly ash heavy metal adsorption device of the embodiment of the present application is as follows: when the adsorption plate 4 in the adsorption area 33 is saturated with adsorption, the replacement motor 51 is started and drives the partition 5 to rotate 180 degrees. At this time, the unsaturated adsorption plate 4 in the replacement area 34 moves to the adsorption area 33 for adsorption work. The adsorption plate 4 with saturated adsorption in the adsorption area 33 enters the replacement area 34. The worker opens the replacement door 341 and pulls the plug-in block 63 to disengage it from the plug-in slot 41. At this time, the spring 64 is compressed, and the worker pulls the adsorption plate 4 out of the installation slot. After taking out, the worker inserts a new adsorption plate 4 into the installation slot. Then the worker releases the force on the plug-in block 63, and the spring 64 resets and pushes the plug-in block 63 into the plug-in slot 41. At this time, the adsorption plate 4 is installed on the partition 5 under the plug-in cooperation of the two plug-in blocks 63 and the plug-in slot 41. After the installation is completed, the worker closes the replacement door 341. This setting realizes the simultaneous progress of the adsorption process and the replacement process. The operator's operation of replacing the adsorption plate 4 in the replacement area 34 will not cause the interruption of the heavy metal adsorption process, thereby ensuring the continuity of the heavy metal adsorption process, thereby shortening the heavy metal removal time and improving the removal efficiency of heavy metals in incineration fly ash.

[0045] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A hazardous waste incineration fly ash heavy metal adsorption device, comprising a spray box (1), a drying box (2) and an adsorption box (3) connected in sequence, wherein the adsorption box (3) is provided with an air inlet (31) and an air outlet (32), characterized in that: The adsorption box (3) is provided with a replacement motor (51), and the output shaft of the replacement motor (51) is provided with a partition (5), and the partition (5) is rotatably connected to the inside of the adsorption box (3), and the outer peripheral side wall of the partition (5) is tightly fitted with the inner side wall of the adsorption box (3), and the upper and lower end faces of the partition (5) are respectively enclosed with the inner side wall of the adsorption box (3) to form an adsorption area (33) and a replacement area (34), and the air inlet (31) and the air outlet (32) are both located in the adsorption area (33), and a plurality of adsorption plates (4) are provided in the adsorption area (33) and the replacement area (34), and the plurality of adsorption plates (4) are detachably connected to the partition (5) through a connecting assembly (6), and a replacement door (341) is hinged on the replacement area (34).

2. The device for adsorbing heavy metals from fly ash from hazardous waste incineration according to claim 1, characterized in that: The connecting assembly (6) includes a mounting plate (61) arranged on both sides of the adsorption plate (4), a plurality of mounting posts (62) are evenly and equidistantly arranged on the mounting plate (61), a plug-in block (63) is slidably connected to the plurality of mounting posts (62), and a plug-in slot (41) for plugging with the plug-in block (63) is provided on the opposite end surface of the adsorption plate (4), and a spring (64) is sleeved on each of the mounting posts (62), one end of the spring (64) is arranged on the mounting plate (61), and the other end is arranged on the plug-in block (63), and when the spring (64) is in a natural state, the plug-in block (63) is plugged into the plug-in slot (41).

3. The device for adsorbing heavy metals from fly ash from hazardous waste incineration according to claim 1, characterized in that: A stirring assembly (7) is provided in the spray box (1), and the stirring assembly (7) comprises a main stirring shaft (71) and a plurality of auxiliary stirring shafts (72) which are rotatably connected to the inside of the spray box (1); the main stirring shaft (71) is provided at the axis of the spray box (1); the plurality of auxiliary stirring shafts (72) are uniformly arranged on the outer surface of the main stirring shaft (71) in the circumferential direction; the main stirring shaft (71) and the auxiliary stirring shaft (72) are both provided with a plurality of stirring blades (73); adjacent stirring blades (73) are arranged in a staggered manner; and a rotating assembly (8) is provided in the spray box (1) for driving the main stirring shaft (71) and the auxiliary stirring shaft (72) to rotate synchronously.

4. The device for adsorbing heavy metals from fly ash from hazardous waste incineration according to claim 3, characterized in that: The rotating assembly (8) comprises a driving gear (82) arranged on the main stirring shaft (71); a driven gear (83) meshing with the driving gear (82) is arranged on the auxiliary stirring shaft (72); the driving gear (82) and the driven gear (83) are rotatably connected to the inner top wall of the spray box (1); a gear ring (84) is arranged on the inner peripheral side wall of the spray box (1); and the gear ring (84) meshes with a plurality of the driven gears (83).

5. The device for adsorbing heavy metals from fly ash from hazardous waste incineration according to claim 3, characterized in that: The spray box (1) is connected to an air inlet pipe (102), a side wall of the spray box (1) is provided with an annular groove (9) connected to the air inlet pipe (102), an arc-shaped baffle (10) is slidably provided in the annular groove (9), the arc-shaped baffle (10) blocks the annular groove (9), a plurality of air outlets (1002) are evenly and equidistantly provided on the arc-shaped baffle (10), the air outlet directions of the plurality of air outlets (1002) are arranged toward the stirring assembly (7), a connecting rod (11) is provided on the main stirring shaft (71), and the end of the connecting rod (11) away from the main stirring shaft (71) is connected to the arc-shaped baffle (10).

6. The hazardous waste incineration fly ash heavy metal adsorption device according to claim 5, characterized in that: The opposite end faces of the arc-shaped baffle (10) are both provided with guide strips (1001), and the inner side walls opposite to the annular groove (9) are provided with guide grooves (91) that are slidably matched with the guide strips (1001).

7. The hazardous waste incineration fly ash heavy metal adsorption device according to claim 1, wherein the spray box (1) is provided with a visual window (101).

8. The hazardous waste incineration fly ash heavy metal adsorption device according to claim 1, characterized in that: The inner side walls of the spray box (1), the drying box (2) and the adsorption box (3) are all coated with a polytetrafluoroethylene coating.

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