Iron removal device for ash produced by solid waste incineration

Abstract

The application discloses a kind of for solid waste incineration ash produced iron removal device, including hanging rack, the hanging rack is suspended in the form of suspension above ash conveyor belt, permanent magnet device, the permanent magnet device is installed by the hanging rack, magnetic force generated by permanent magnet device is adsorbed to iron material on ash conveyor belt, rotary device, the rotary device is installed by the hanging rack, and permanent magnet device is located in the inside of the rotary device, magnetic force generated by permanent magnet device penetrates the rotary device, so that iron material is taken away from permanent magnet device along with the rotary device, after being taken away, rotary device loses magnetism at the position where it is separated from permanent magnet device, at this time, iron material originally adsorbed on the surface of rotary device falls off;Passive cleaning device, the passive cleaning device is elastically installed by the hanging rack;The device can realize the efficient separation of iron material in ash, and can also be automatically cleaned, to ensure magnetic penetration.

Description

Technical Field

[0001] This invention relates to the field of waste incineration ash treatment technology, and in particular to an iron removal device for ash generated from solid waste incineration, which is suitable for the separation and recovery of ferrous metals during the ash transportation process of incineration plants. Background Technology

[0002] The ash produced during waste incineration usually contains a certain amount of ferrous metals (such as iron nails, iron wires, metal fragments, etc.). If these metal impurities are not effectively separated, they will not only affect the resource utilization of the ash (such as brick making, roadbed materials, etc.), but may also damage subsequent processing equipment (such as crushers, grinding mills, etc.).

[0003] Currently, common iron removal technologies for ash and slag mainly include:

[0004] Permanent magnet drum separator: It uses a permanent magnet drum to adsorb iron objects, but dust easily accumulates on the drum surface, which leads to the weakening of magnetic force and is inconvenient to clean.

[0005] Electromagnetic separators require continuous power supply, have high energy consumption, and exhibit poor stability under high-temperature conditions.

[0006] Mechanical screening + magnetic separation: The process is complex, the equipment occupies a large space, and the separation effect on small iron particles (<5mm) is not good.

[0007] Using belt drive for separation is a more efficient separation method and offers greater stability.

[0008] However, existing belt-driven iron removal devices have the following technical problems:

[0009] 1. When an ferrous object is attracted by a permanent magnet, the dust particles adhering to its surface are also drawn upwards, causing them to adhere to the surface of the transmission belt and form an air gap. According to Maxwell's equations, the magnetic field strength is inversely proportional to the square of the distance, which leads to a 15-20% decrease in effective magnetic induction.

[0010] 2. Iron-containing dust (Fe2O3, etc.) will form secondary magnetic circuits, dispersing the energy of the main magnetic field.

[0011] 3. Non-magnetic dust (such as SiO2) may become embedded in the micropores on the surface of the rotating belt, increasing magnetic resistance.

[0012] Based on the above problems, we designed an iron removal device for ash produced by solid waste incineration that can achieve efficient separation of iron in ash and slag, and can also automatically clean itself to ensure magnetic penetration. Summary of the Invention

[0013] The technical problem to be solved by the present invention is to provide an iron removal device for ash produced by solid waste incineration that can achieve efficient separation of iron in ash and slag and can also automatically clean it to ensure magnetic penetration.

[0014] To solve the above problems, the present invention adopts the following technical solution:

[0015] An iron removal device for ash residue produced by solid waste incineration, comprising,

[0016] The mounting frame is suspended above the ash conveyor belt.

[0017] A permanent magnet device, mounted on the mounting frame, uses magnetic force to attract and remove ferrous materials from the ash conveyor belt.

[0018] A slewing device is mounted on the mounting frame, and a permanent magnet device is located inside the slewing device. The magnetic force generated by the permanent magnet device penetrates the slewing device, causing the iron object to be carried away from the permanent magnet device along with the slewing device. After being carried away, the position of the slewing device that is separated from the permanent magnet device loses its magnetism. At this time, the iron object that was originally adsorbed on the surface of the slewing device falls off.

[0019] A passive cleaning device is flexibly installed via the mounting frame. During the rotation of the rotary device, the passive cleaning device extends and retracts, thereby cleaning the surface of the rotary device.

[0020] Preferably, the mounting frame includes two parallel frame rods, with a mounting rod fixed at the top of each frame rod near both ends. Slide grooves are provided on the inner and outer walls of each frame rod, with one end of the slide groove closed and the other end extending forward through the frame rod. A groove is provided at the bottom of the frame rod between the two slide grooves. A first side rod is detachably installed between the front ends of the two frame rods, and a second side rod is detachably installed between the rear ends of the two frame rods. Both the permanent magnet device and the rotary device are mounted via the frame rods.

[0021] Preferably, a mounting hole is radially penetrating the outer wall of the mounting rod.

[0022] Preferably, the permanent magnet device includes a hanging plate, a housing, and a permanent magnet. The hanging plate spans between the two frame rods and is fixed to the frame rods. The housing is detachably installed at the bottom of the hanging plate and has an opening at the bottom. The permanent magnet is inserted through the bottom opening of the housing, and the bottom of the permanent magnet is partially exposed outside the housing. Fixing members for fixing the permanent magnet are screwed into both sides of the housing. The magnetic force generated by the permanent magnet penetrates downward through the rotating device.

[0023] Preferably, the rotary device includes a rotary belt, a tension roller group, a transition roller group, a drive roller group, a drive motor, and a transmission unit; the transition roller group has upper and lower sets, respectively installed on the upper and lower sides of the frame rod; the tension roller group is slidably installed via the slide groove; the tension roller group and the lower transition roller group are on the same horizontal plane; the drive roller group is installed on the top of the frame rod; the drive roller group and the upper transition roller group are on the same horizontal plane; the drive roller group and the upper transition roller group are located below the tension roller group. Between the tension roller group and the lower transition roller group; the rotary belt is installed through the tension roller group, the transition roller group and the drive roller group; the drive motor is connected to drive the drive roller group through the transmission unit; the drive roller group drives the passive cleaning device; the passive cleaning device cleans the outer surface of the rotary belt; the lower end face of the permanent magnet is close to the inner wall surface of the rotary belt; scrapers are equidistantly arranged on the outer wall surface of the rotary belt, and the end of the scraper away from the rotary belt is inclined downward in the direction of movement of the rotary belt.

[0024] Preferably, the tensioning roller assembly includes two parallel sliding blocks, each sliding block having a sliding strip that engages with the groove, and a sliding plate that engages with the groove. A first roller shaft is rotatably mounted between the two sliding blocks. A drive rod is rotatably mounted via a first side rod, the drive rod being inserted into the groove and threadedly engaged with the sliding plate. Rotation of the drive rod causes the sliding plate to slide along the groove. The transition roller assembly includes two symmetrically arranged first bearing seats, and a second roller shaft is rotatably mounted between the two first bearing seats. The active roller assembly includes two symmetrically arranged second bearing seats. A third roller shaft is rotatably mounted between the two second bearing seats. Rollers are mounted on the first, second, and third roller shafts, and the rotary belt is supported by the rotation of the rollers. A drive plate is welded to the roller body that engages with the third roller shaft, and the passive cleaning device is driven by the drive plate.

[0025] Preferably, an annular groove is machined on the outer wall of the roller body, the rotating belt is positioned through the annular groove, and synchronous tooth grooves are distributed in annularly near both ends of the bottom of the annular groove. The middle part of the inner wall of the rotating belt is a smooth part, which contacts the permanent magnet. Synchronous teeth are provided near both sides of the inner wall of the rotating belt, and the synchronous teeth mesh with the synchronous tooth grooves.

[0026] Preferably, the passive cleaning device includes two vertical rods welded to the top of the frame rods, a negative pressure box fixed between the two vertical rods, the negative pressure box having a negative pressure port facing the outer wall of the rotating belt, a guide rod fixed to the end face of the vertical rod facing the rotating belt, and a sliding rod slidably installed between the two guide rods, with a limit cap screwed into the end of the guide rod, the limit cap limiting the sliding of the sliding rod; a spring is sleeved on the guide rod, and under the action of the spring, the sliding rod moves towards the rotating belt. The slide rod is rotatably mounted near both ends on its outer side, and the drive plate cooperates with the pulleys. A sleeve is fixed to the outer wall of the slide rod, and an outer support is provided on the outer wall of the sleeve. Brushes are embedded through the outer support. When the drive plate separates from the pulleys, the brushes act on the surface of the rotating belt. When the apex of the drive plate acts on the pulleys, the brushes detach from the outer surface of the rotating belt. At the same time as the detachment, the scraper passes through the detachment point of the brushes. A negative pressure fan is connected to the negative pressure box.

[0027] Preferably, a throwing plate is installed between the bottom of the two frame rods. One end of the throwing plate is connected to the bottom of the permanent magnet, and the other end is inclined downward. When the rotating belt runs above the throwing plate, it loses its magnetism. At this time, the iron adsorbed on the surface of the rotating belt is thrown onto the throwing plate and discharged along the throwing plate.

[0028] Preferably, a return material cover is welded between the outer sides of the two slide blocks; the lower end of the return material cover is inclined downward to correspond to the throwing plate, and the upper end of the return material cover is higher than the axis of the first roller.

[0029] The beneficial effects of this invention are:

[0030] Firstly, this device, through the continuous rotation of the rotating belt and the permanent magnet positioned above the ash conveyor belt, ensures that there is always magnetic capture of ferrous objects on the ash conveyor belt, resulting in a high capture rate (the measured capture rate of ferrous objects is greater than 90%).

[0031] Secondly, the rotation of the roller drives the rotating body to rotate, which in turn drives the passive cleaning device to make elastic displacement. The operation of the passive cleaning device will jump away from the scraper, avoiding action on the scraper surface and avoiding technical problems of operation interference. At the same time, the bristles can clean the surface of the rotating belt, ensuring the surface of the rotating belt is clean and ensuring that the magnetism of the permanent magnet can be effectively penetrated.

[0032] Thirdly, the design of the tension roller assembly maintains the tension of the rotating belt, ensuring a stable distance between the rotating belt and the permanent magnet. This ensures that the magnet can effectively capture ferrous objects after penetrating the rotating belt. When maintenance of the permanent magnet is required, the displacement of the tension roller assembly loosens the rotating belt, making it easier to remove the permanent magnet from the side of the rotating belt. The tension roller assembly can also be loosened to separate the rotating belt from the roller body, facilitating the adjustment of the rotating belt's position and ensuring accurate matching of the scraper's position, thus avoiding operational interference with the passive cleaning device.

[0033] Fourthly, this device is suspended and does not occupy ground space, making it easy to set up and also convenient for direct upgrades to existing ash conveyors.

[0034] Fifthly, the passive cleaning device captures particles through negative pressure after sweeping away particles from the surface of the rotating belt, preventing particles from falling and keeping the entire working area clean. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a perspective view of the present invention;

[0037] Figure 2 A schematic diagram showing the installation of the mounting frame and permanent magnet device;

[0038] Figure 3 A 3D view of the mounting frame;

[0039] Figure 4 This is a schematic diagram of the installation of the rotary device;

[0040] Figure 5 Here is a structural diagram of the slide block;

[0041] Figure 6 for Figure 1 Enlarged view at point A;

[0042] Figure 7 This is a three-dimensional view of the roller.

[0043] Figure 8 This is a schematic diagram of the rear of the device;

[0044] Figure 9 This is a schematic diagram of the front of the device.

[0045] Figure reference numerals:

[0046] 1. Mounting frame; 2. Permanent magnet device; 3. Rotary device; 4. Passive cleaning device; 5. Throwing plate; 11. Frame rod; 12. Mounting rod; 13. Slide groove; 14. Groove; 15. First side rod; 16. Second side rod; 121. Mounting hole; 21. Mounting plate; 22. Housing; 23. Permanent magnet; 24. Fixing component; 31. Rotary belt; 32. Tensioning roller group; 33. Transition roller group; 34. Drive roller group; 35. Drive motor; 36. Transmission unit; 37. Roller body; 3111. Smooth part; 3112. Synchronous gear; 3131. Scraper. Slide 321, slide bar 322, slide plate 323, first roller shaft 324, drive rod 325, return material cover 3221, first bearing seat 331, second roller shaft 332, second bearing seat 341, third roller shaft 342, drive plate 371, annular groove 372, synchronous tooth groove 373, vertical rod 41, negative pressure box 42, negative pressure port 43, guide rod 44, slide bar 45, limit cap 46, spring 47, pulley 48, sleeve 49, outer support 410, brush bristles 411, negative pressure fan 412. Detailed Implementation

[0047] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0048] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0049] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0050] Furthermore, in the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] See Figure 1 The illustrated iron removal device for ash residue produced by solid waste incineration includes,

[0053] The mounting frame 1 is suspended above the ash conveyor belt by a suspension method.

[0054] The permanent magnet device 2 is installed via the mounting frame 1. The magnetic force generated by the permanent magnet device 2 attracts and removes ferrous objects from the ash conveyor belt.

[0055] The rotating device 3 is installed via the mounting frame 1, and the permanent magnet device 2 is located inside the rotating device 3. The magnetic force generated by the permanent magnet device 2 penetrates the rotating device 3, causing the iron object to be carried away from the permanent magnet device 2 along with the rotating device 3. After being carried away, the position of the rotating device 3 that is separated from the permanent magnet device 2 loses its magnetism. At this time, the iron object that was originally adsorbed on the surface of the rotating device 3 falls off.

[0056] The passive cleaning device 4 is flexibly installed on the mounting frame 1. During the rotation of the rotary device 3, the passive cleaning device 4 is extended and retracted, and the surface of the rotary device 3 is cleaned by the passive cleaning device 4.

[0057] In the above technical solution, the suspending frame 1 is used in conjunction with iron cables or chains to suspend the ash conveyor belt above it and as close as possible to the ash conveyor belt.

[0058] The permanent magnet device 2 provides magnetic force, which penetrates the rotary device 3 and adsorbs iron objects on the ash conveyor belt.

[0059] After the iron object is adsorbed, it is carried away by the rotating device 3. After it is separated from the permanent magnet device 2, the magnetism disappears, and the iron object falls off and is separated.

[0060] In the above technical solution, the permanent magnet device 2 is used, which does not require power supply and has lower energy consumption.

[0061] See Figure 1 , Figure 2 and Figure 3As shown, the mounting frame 1 includes two parallel frame rods 11. A mounting rod 12 is fixed to the top of each frame rod 11 near both ends. Slide grooves 13 are provided on the inner and outer walls of each frame rod 11. One end of each slide groove 13 is closed, and the other end extends forward through the frame rod 11. A groove 14 is provided at the bottom of each frame rod 11 between the two slide grooves 13. A first side rod 15 is detachably installed between the front ends of the two frame rods 11, and a second side rod 16 is detachably installed between the rear ends of the two frame rods 11. The permanent magnet device 2 and the rotary device 3 are both mounted via the frame rods 11.

[0062] See Figure 2 As shown, a mounting hole 121 is radially penetrating the outer wall of the mounting rod 12.

[0063] During suspension installation, the iron chain or cable is passed through the mounting hole 121, thereby suspending the device directly above the ash conveyor belt.

[0064] See Figure 1 and Figure 2 As shown, the permanent magnet device 2 includes a mounting plate 21, a housing 22, and a permanent magnet 23. The permanent magnet 23 is composed of several NdFeB magnetic blocks, which are bonded together with epoxy resin. The housing 22 is made of 1.5mm thick electrical pure iron, with a μ-metal shielding layer on the top. The magnetic induction intensity at the contact surface of the rotating belt 31 reaches 0.8-1.2T. The mounting plate 21 spans between the two frame rods 11 and is fixed to the frame rods 11. The housing 22 is detachably installed at the bottom of the mounting plate 21. The bottom of the housing 22 has an opening, and the permanent magnet 23 is inserted through the bottom opening of the housing 22. The bottom of the permanent magnet 23 is partially exposed outside the housing 22. Fixing members 24 for fixing the permanent magnet 23 are screwed into both sides of the housing 22. The magnetic force generated by the permanent magnet 23 penetrates downward through the rotating device 3.

[0065] In the above technical solution, the box 22 is suspended and installed by the hanging plate 21.

[0066] During use, permanent magnets may weaken due to high temperatures, mechanical impacts, and other factors.

[0067] When the permanent magnet needs to be replaced, simply disconnect the connection between the mounting plate 21 and the housing 22, allowing the housing 22 to fall between the two frame rods 11. After falling, it can be removed from the side of the rotating device 3 for replacement, without having to dismantle the entire device, making maintenance more convenient.

[0068] The permanent magnet is fixed in place using fasteners, and its height can be adjusted as needed.

[0069] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the rotary device 3 includes a rotary belt 31, a tension roller group 32, a transition roller group 33, a drive roller group 34, a drive motor 35, and a transmission unit 36. The transition roller group 33 has upper and lower sets, respectively installed on the upper and lower sides of the frame rod 11. The tension roller group 32 is slidably installed through the slide groove 13. The tension roller group 32 and the lower transition roller group 33 are on the same horizontal plane. The drive roller group 34 is installed on the top of the frame rod 11. The drive roller group 34 and the upper transition roller group 33 are on the same horizontal plane. The drive roller group 34 and the upper transition roller group 33 are located below the tension roller group 32. Between the transition roller group 33 below and the rotating belt 31; the rotating belt 31 is installed through the tension roller group 32, the transition roller group 33 and the active roller group 34; the drive motor 35 is connected to drive the active roller group 34 through the transmission unit 36; the active roller group 34 drives the passive cleaning device 4; the passive cleaning device 4 cleans the outer surface of the rotating belt 31; the lower end face of the permanent magnet 23 is close to the inner wall surface of the rotating belt 31; scrapers 3131 are equidistantly arranged on the outer wall surface of the rotating belt 31, and the end of the scraper 3131 away from the rotating belt 31 is inclined downward in the direction of movement of the rotating belt 31.

[0070] The gap between the lower surface of the permanent magnet 23 and the inner wall of the rotating belt 31 is ≤0.3mm.

[0071] The transmission unit 36 ​​is one of belt drive, gear drive, or chain drive.

[0072] In this embodiment, the transmission unit 36 ​​is a belt drive, and a synchronous toothed belt is used.

[0073] The drive motor 35 is a 0.75kW servo motor with a rated torque of 4.8N·m.

[0074] In the above technical solution, the scraper 3131 is designed so that during the rotation of the rotating belt 31, the magnetically adsorbed iron object can be driven away from the effective range of the permanent magnet.

[0075] The rotation of the rotary belt 31 is achieved by a single drive motor 35, which also passively drives the passive cleaning device 4 to clean the outer surface of the rotary belt 31. Keeping the surface of the rotary belt 31 clean allows for better magnetic penetration.

[0076] See Figure 3 , Figure 5 and Figure 6 As shown, the tensioning roller assembly 32 includes two parallel sliding blocks 321. Each sliding block 321 has a sliding strip 322 that cooperates with the sliding groove 13. Each sliding block 321 has a sliding plate 323 that engages with the groove 14. A first roller shaft 324 is rotatably mounted between the two sliding blocks 321. A drive rod 325 is rotatably mounted via the first side rod 15. The drive rod 325 is inserted into the groove 14 and threadedly engaged with the sliding plate 323. The rotation of the drive rod 325 drives the sliding plate 323 to slide along the groove 14. The transition roller assembly 33 includes... The active roller assembly 34 includes two symmetrically arranged first bearing seats 331, and a second roller shaft 332 is rotatably mounted between the two first bearing seats 331; the active roller assembly 34 includes two symmetrically arranged second bearing seats 341; a third roller shaft 342 is rotatably mounted between the two second bearing seats 341, and roller bodies 37 are mounted on the first roller shaft 324, the second roller shaft 332 and the third roller shaft 342, and the rotary belt 31 is rotatably supported by the roller bodies 37; a drive plate 371 is welded to the roller body 37 that mates with the third roller shaft 342, and the passive cleaning device 4 is driven by the drive plate 371.

[0077] In the above technical solution, the active rotating roller 37 is upgraded by designing a drive plate 371. The drive plate 371 is an isosceles triangle with an arc transition at its tip. The passive cleaning device 4 is driven by the drive plate 371 to avoid interference between the passive cleaning device 4 and the scraper 3131.

[0078] In the above technical solution, the tension roller group 32 is adjustable in tension to ensure the rotational stability of the rotary belt 31. Secondly, when replacing or repairing the permanent magnet, the rotary belt 31 is loosened by relaxing the tension roller group 32, which facilitates the downward detachment of the housing 22 and then the rotary belt 31 is taken out from the side.

[0079] See Figure 3 , Figure 6 and Figure 7 As shown, an annular groove 372 is machined on the outer wall of the roller body 37, and the rotating belt 31 is positioned through the annular groove 372. Synchronous tooth grooves 373 are distributed in annularly near both ends of the bottom of the annular groove 372. The middle position of the inner wall of the rotating belt 31 is a smooth part 3111, which contacts the permanent magnet 23. Synchronous teeth 3112 are provided near both sides of the inner wall of the rotating belt 31, and the synchronous teeth 3112 mesh with the synchronous tooth grooves 373.

[0080] In the above technical solution, a special design is made for the rotary belt 31. The area of ​​the rotary belt 31 that needs magnetic penetration is the smooth part 3111. This smooth part 3111 can be close to the permanent magnet, and even occasionally make contact. The setting of the synchronous tooth 3112 ensures the accurate transmission ratio. Ensuring the accurate transmission ratio can ensure the running accuracy of the drive board 371.

[0081] See Figure 8 As shown, the passive cleaning device 4 includes two vertical rods 41 welded to the top of the frame rod 11. A negative pressure box 42 is fixed between the two vertical rods 41. The negative pressure box 42 has a negative pressure port 43 facing the outer wall of the rotating belt 31. A guide rod 44 is fixed at the end face of the vertical rod 41 facing the rotating belt 31. A sliding rod 45 is slidably installed between the two guide rods 44. A limit cap 46 is screwed into the end of the guide rod 44, and the limit cap 46 limits the sliding of the sliding rod 45. A spring 47 is sleeved on the guide rod 44. Under the action of the spring 47, the sliding rod 45 moves towards the rotating belt 31. The outer side of the sliding rod 45 is close to Pullers 48 are rotatably installed at both ends, and the drive plate 371 cooperates with the pulleys 48; a sleeve 49 is fixed on the outer wall of the slide rod 45, and an outer bracket 410 is provided on the outer wall of the sleeve 49. Brush bristles 411 are inserted through the outer bracket 410. When the drive plate 371 is separated from the pulley 48, the brush bristles 411 act on the surface of the rotating belt 31; when the apex of the drive plate 371 acts on the pulley 48, the brush bristles 411 detach from the outer surface of the rotating belt 31. At the same time as the detachment, the scraper 3131 passes through the detachment position of the brush bristles; a negative pressure fan 412 is connected to the negative pressure box 42, and the air outlet of the negative pressure fan 412 is connected to the dust removal equipment through a flexible hose.

[0082] The negative pressure box 42 maintains a negative pressure of -1.5kPa to -2kPa. The brush bristles 411 are made of copper-plated steel wire with a diameter of 0.15mm and a density of 8000~15000 wires / dm².

[0083] In the above technical solution, when the spring 47 is in a relaxed state, the end of the outer bracket 410 does not contact the scraper 3131. That is to say, even if the position of the drive plate 371 is inaccurate, the scraper 3131 will not make hard contact with the outer bracket 410. Only the bristles 411 will contact the scraper 3131, and since the bristles 411 can be softly deformed, the damage to the entire device is minimal.

[0084] The design of pulley 48 facilitates its cooperation with drive plate 371 to complete the displacement of slide rod 45.

[0085] See Figure 9As shown, a throwing plate 5 is installed between the bottom of the two frame rods 11. One end of the throwing plate 5 is connected to the lower part of the permanent magnet 23, and the other end is tilted downward. When the rotating belt 31 runs above the throwing plate 5, it loses its magnetism. At this time, the iron adsorbed on the surface of the rotating belt 31 is thrown onto the throwing plate 5 and discharged along the throwing plate 5.

[0086] In the above technical solution, the design of the throwing plate 5 can better receive the separated iron material and prevent the iron material from falling to the bottom of the ash conveyor belt.

[0087] See Figure 9 As shown, a return material cover 3221 is welded between the outer sides of the two slide blocks 321; the lower end of the return material cover 3221 is inclined downward to correspond to the throwing plate 5, and the upper end of the return material cover 3221 is higher than the axis of the first roller 324.

[0088] The purpose of the return hood 3221 is to use the centrifugal force generated during the rotation of the surface rotating belt 31 to throw the iron objects outward. Together with the throwing plate 5 below, the separated iron objects can be effectively collected.

[0089] When the device is working, the ash and slag pass through the conveyor belt at a speed of ≤50mm / s. The ferrous material is attracted to the outer surface of the rotating belt 31 by the permanent magnet 23. After moving to the throwing zone with the rotating belt 31 at a linear speed of 0.3-0.5m / s, it loses its magnetism and falls off. The brush bristles 411 contact the surface of the rotating belt 31 for cleaning under the action of the spring 47. The negative pressure system sucks up the residual fine powder.

[0090] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An iron removal device for ash residue produced by solid waste incineration, characterized in that: include, A mounting frame (1) is suspended above the ash conveyor belt by means of suspension. The mounting frame (1) includes two parallel frame rods (11). Slide grooves (13) are provided on the inner and outer walls of the frame rods (11). One end of the slide groove (13) is closed and the other end passes forward through the frame rod (11). At the bottom of the frame rod (11), a groove (14) is provided between the two slide grooves (13). A first side rod (15) is detachably installed between the front ends of the two frame rods (11). The permanent magnet device (2) is installed via the mounting frame (1). The magnetic force generated by the permanent magnet device (2) attracts and removes iron objects from the ash conveyor belt. Rotary device (3), the rotary device (3) is installed through the mounting frame (1), and the permanent magnet device (2) is located inside the rotary device (3). The magnetic force generated by the permanent magnet device (2) penetrates the rotary device (3), causing the iron object to be carried away from the permanent magnet device (2) along with the rotary device (3). After being carried away, the rotary device (3) loses its magnetism at the position where it is separated from the permanent magnet device (2). At this time, the iron object that was originally adsorbed on the surface of the rotary device (3) falls off. Passive cleaning device (4), the passive cleaning device (4) is elastically installed through the mounting frame (1), and the rotating device (3) rotates during the rotation process, driving the passive cleaning device (4) to extend and retract, and the passive cleaning device (4) cleans the surface of the rotating device (3); The permanent magnet device (2) includes a mounting plate (21), a housing (22), and a permanent magnet (23). The mounting plate (21) spans between two frame rods (11) and is fixed to the frame rods (11). The housing (22) is detachably installed at the bottom of the mounting plate (21). The bottom of the housing (22) has an opening, and the permanent magnet (23) is inserted from the bottom opening of the housing (22). The bottom of the permanent magnet (23) is partially exposed to the outside of the housing (22). Fixing members (24) for fixing the permanent magnet (23) are screwed into both sides of the housing (22). The magnetic force generated by the permanent magnet (23) penetrates downward through the rotary device (3). The rotary device (3) includes a rotary belt (31), a tension roller group (32), a transition roller group (33), a drive roller group (34), a drive motor (35), and a transmission unit (36). The transition roller group (33) is provided with upper and lower sets, which are respectively installed on the upper and lower sides of the frame rod (11). The tension roller group (32) is slidably installed through the slide groove (13). The tension roller group (32) and the lower transition roller group (33) are on the same horizontal plane. The drive roller group (34) is installed on the top of the frame rod (11). The drive roller group (34) and the upper transition roller group (33) are on the same horizontal plane. The drive roller group (34) and the upper transition roller group (33) are located on the tension roller group (35). 2) Between the transition roller group (33) below; the rotary belt (31) is installed through the tension roller group (32), the transition roller group (33) and the active roller group (34); the drive motor (35) is connected to drive the active roller group (34) through the transmission unit (36); the active roller group (34) drives the passive cleaning device (4); the passive cleaning device (4) cleans the outer surface of the rotary belt (31); the lower end face of the permanent magnet (23) is close to the inner wall of the rotary belt (31); scrapers (3131) are equidistantly arranged on the outer wall of the rotary belt (31), and the end of the scraper (3131) away from the rotary belt (31) is inclined downward in the direction of movement of the rotary belt (31); The tensioning roller assembly (32) includes two parallel sliding blocks (321), each sliding block (321) having a sliding strip (322) that engages with the groove (13), and a sliding plate (323) that engages with the groove (14). A first roller shaft (324) is rotatably mounted between the two sliding blocks (321). A drive rod (325) is rotatably mounted on the first side rod (15), the drive rod (325) being inserted into the groove (14), and the drive rod (325) being threadedly engaged with the sliding plate (323). The rotation of the drive rod (325) causes the sliding plate (323) to slide along the groove (14). The transition roller assembly (33) The active roller assembly (34) includes two symmetrically arranged first bearing seats (331), and a second roller shaft (332) is rotatably mounted between the two first bearing seats (331); the active roller assembly (34) includes two symmetrically arranged second bearing seats (341); a third roller shaft (342) is rotatably mounted between the two second bearing seats (341), and roller bodies (37) are mounted on the first roller shaft (324), the second roller shaft (332) and the third roller shaft (342), and the rotary belt (31) is rotatably supported by the roller bodies (37); a drive plate (371) is welded to the roller body (37) that mates with the third roller shaft (342), and the drive plate (371) drives the passive cleaning device (4). The outer wall of the roller (37) is machined with an annular groove (372), the rotary belt (31) is positioned by the annular groove (372), the bottom of the annular groove (372) is distributed with synchronous tooth grooves (373) near both ends, the middle position of the inner wall of the rotary belt (31) is a smooth part (3111), the smooth part (3111) is in contact with the permanent magnet (23), and synchronous teeth (3112) are provided near both sides of the inner wall of the rotary belt (31), the synchronous teeth (3112) mesh with the synchronous tooth grooves (373); The passive cleaning device (4) includes two vertical rods (41) welded to the top of the frame rod (11). A negative pressure box (42) is fixed between the two vertical rods (41). The negative pressure box (42) has a negative pressure port (43) facing the outer wall of the rotating belt (31). A guide rod (44) is fixed at one end of the vertical rod (41) facing the rotating belt (31). A sliding rod (45) is slidably installed between the two guide rods (44). A limit cap (46) is screwed into the end of the guide rod (44), and the limit cap (46) limits the sliding of the sliding rod (45). A spring (47) is sleeved on the guide rod (44). Under the action of the spring (47), the sliding rod (45) moves towards the rotating belt (31). The slide bar (45) is rotatably mounted near both ends of the slide bar (45), and the drive plate (371) cooperates with the pulley (48); a sleeve (49) is fixed on the outer wall of the slide bar (45), and an outer bracket (410) is provided on the outer wall of the sleeve (49). The outer bracket (410) is embedded with bristles (411). When the drive plate (371) separates from the pulley (48), the bristles (411) act on the surface of the rotating belt (31); when the apex of the drive plate (371) acts on the pulley (48), the bristles (411) detach from the outer surface of the rotating belt (31). At the same time as the detachment, the scraper (3131) passes through the detachment position of the bristles; a negative pressure fan (412) is connected to the negative pressure box (42).

2. The iron removal device for ash residue generated from solid waste incineration according to claim 1, characterized in that: A mounting rod (12) is fixed at the top of each of the frame rods (11) near both ends, and a second side rod (16) is detachably installed between the rear ends of the two frame rods (11); the permanent magnet device (2) and the rotary device (3) are both installed through the frame rods (11).

3. The iron removal device for ash residue generated from solid waste incineration according to claim 2, characterized in that: A mounting hole (121) is radially penetrating the outer wall of the mounting rod (12).

4. The iron removal device for ash residue generated from solid waste incineration according to claim 1, characterized in that: A throwing plate (5) is installed between the bottom of the two frame rods (11). One end of the throwing plate (5) is connected to the bottom of the permanent magnet (23), and the other end is tilted downward. When the rotating belt (31) runs above the throwing plate (5), it loses its magnetism. At this time, the iron adsorbed on the surface of the rotating belt (31) is thrown onto the throwing plate (5) and discharged along the throwing plate (5).

5. The iron removal device for ash residue generated from solid waste incineration according to claim 4, characterized in that: A return cover (3221) is welded between the outer sides of the two slides (321); the lower end of the return cover (3221) is tilted downwards and corresponds to the throwing plate (5), and the upper end of the return cover (3221) is higher than the axis of the first roller (324).

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