Landfill leachate disc type drying treatment equipment and coating material

Abstract

The invention discloses landfill leachate disc type drying treatment equipment and a coating material, and relates to the technical field of environmental protection, the landfill leachate disc type drying treatment equipment comprises a shell, a plurality of discs and a heating device, and further comprises a spraying device and a scraping device; the spraying device comprises a plurality of spraying pipes; a spraying section is arranged at one end, close to the disc, of the spraying pipe; the spraying section is provided with a plurality of spraying openings, and the spraying directions of the spraying openings face the corresponding discs. The scraping device comprises a plurality of fixing plates and a plurality of scraping pieces; the fixed plate is positioned in the treatment space; the multiple scraping pieces are arranged on the side, close to the corresponding discs, of the fixing plate and can make contact with and abut against the corresponding discs, and the fixing plate can guide solid crystals to move in the direction close to the waste discharging opening. According to the landfill leachate drying device, the efficiency of discharging solid crystals after the landfill leachate is dried can be effectively improved while the drying effect of the landfill leachate is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of environmental protection, and particularly to a disc drying treatment device for landfill leachate and a coating material. Background Art

[0002] During the landfill and stacking processes of domestic waste, leachate is generated due to fermentation, rainwater scouring, and immersion by surface water and groundwater. Landfill leachate is a high-concentration organic wastewater with complex components, mainly originating from the water contained in the waste itself, the water generated by the biochemical reaction of the waste, the reverse infiltration of underground groundwater, and atmospheric precipitation. Since landfill leachate can cause serious pollution to the surrounding water bodies and soil if not properly treated, special treatment equipment is usually used to treat landfill leachate.

[0003] During the landfill and stacking processes of domestic waste, leachate is generated due to fermentation, rainwater scouring, and immersion by surface water and groundwater. Landfill leachate is a high-concentration organic wastewater with complex components, mainly originating from the water contained in the waste itself, the water generated by the biochemical reaction of the waste, the reverse infiltration of underground groundwater, and atmospheric precipitation. Since landfill leachate can cause serious pollution to the surrounding water bodies and soil if not properly treated, special treatment equipment is usually used to treat landfill leachate.

[0004] Currently, a drying device is usually used to treat landfill leachate. It dries the landfill leachate sprayed onto the surface of a carrier by the heat of a heating medium (steam) to obtain solid crystals, and scrapes off and discharges the solid crystals on the surface of the carrier by a scraper, so as to effectively reduce the impact of landfill leachate on the environment. However, although the above drying device has a good drying effect on the landfill leachate sprayed onto the surface of the carrier, the landfill leachate sprayed onto the surface of the carrier is prone to leaving the carrier under the action of gravity due to untimely heat drying. After that, it needs to be recovered and then re-sprayed onto the surface of the carrier for drying treatment again, and it is difficult to ensure the effect of scraping off the solid crystals by the scraper, thus affecting the treatment efficiency of landfill leachate.

[0005] Therefore, it is urgent to improve the above existing technology to improve its treatment efficiency of landfill leachate. Summary of the Invention

[0006] This application provides a disc drying treatment device for landfill leachate and a coating material, which can effectively improve the efficiency of discharging solid crystals after drying landfill leachate while ensuring the drying effect of landfill leachate.

[0007] On the one hand, this application provides a disc drying treatment device for landfill leachate, adopting the following technical solution: A garbage leachate disk drying treatment device and a coating material, comprising a housing, a plurality of disks and a heating device. The interior of the housing has a treatment space, and the housing also has a waste discharge port for discharging solid crystals. The plurality of disks are arranged in the treatment space with their axes coinciding and evenly spaced. The heating device can introduce steam into the interiors of the plurality of disks and can discharge the liquid formed after the steam condenses, and further includes a spraying device and a scraping device. The spraying device includes a spraying pipe fixedly arranged on the housing, one end of which extends into the treatment space and is located between adjacent disks. The end of the spraying pipe close to the disk has a plurality of spraying sections. Each disk corresponds to two spraying sections, and the two spraying sections are respectively located on both sides of the corresponding disk in the axial direction. The spraying sections extend in the radial direction of the disk, and the spraying sections have a plurality of spraying orifices. The plurality of spraying orifices are evenly spaced along the extension direction of the spraying section, and the spraying direction of the spraying orifices faces the corresponding disk. The scraping device includes a plurality of fixing plates and a plurality of scraping members. Each disk corresponds to two fixing plates, and the two fixing plates are respectively located on both sides of the corresponding disk in the axial direction. The fixing plates are located in the treatment space, extend in the radial direction of the disk, and are respectively located on both sides of the axis of the disk from the spraying pipe. The plurality of scraping members are arranged on the side of the fixing plate close to the corresponding disk and can be in contact with and against the corresponding disk, and the fixing plates can guide the solid crystals to move towards the direction close to the waste discharge port.

[0008] By adopting the above technical solution, the spraying device can spray the garbage leachate more evenly onto the surface of the disk, so that the garbage leachate sprayed onto the surface of the disk can be heated and dried more fully, thereby effectively improving the efficiency of the garbage leachate being heated and dried to obtain solid crystals. At the same time, it is convenient for the scraping device to scrape and discharge the solid crystals on the surface of the disk, effectively improving the efficiency of discharging the solid crystals after the garbage leachate is dried while ensuring the drying effect of the garbage leachate.

[0009] Optionally, the inner and outer walls on both sides of the disk along its own axis direction are concave-convex surfaces, and the scraping member is adapted to the shape of the outer wall surface of the corresponding disk.

[0010] By adopting the above technical solution, it can effectively increase the contact area between the steam introduced into the disk and the disk, and at the same time can effectively increase the contact area between the garbage leachate and the surface of the disk, thereby effectively improving the efficiency of heat transfer from the disk to the garbage leachate on the surface of the disk, and further improving the efficiency of the garbage leachate being heated and dried.

[0011] Optionally, the outer walls on both sides of the disc along its own axis direction are each provided with a plurality of annular track grooves, the axes of the grooves coincide with the axis of the disc, and the plurality of grooves are equidistantly distributed in the radial direction of the disc.

[0012] By adopting the above technical solution, during the rotation of the disc, the garbage leachate sprayed onto the surface of the disc can flow along the grooves under its own gravity, so that the garbage leachate can be further evenly distributed on the surface of the disc, further improving the efficiency of heat drying of the garbage leachate. At the same time, it can reduce the situation where the garbage leachate leaves the disc without being heated and dried in time, and improve the treatment efficiency of the garbage leachate.

[0013] Optionally, the scraping member is movably connected to the fixing plate, and the moving direction of the scraping member is parallel to the axis of the disc.

[0014] By adopting the above technical solution, it is convenient for the staff to adjust the position of the scraping member according to the wear condition of the scraping member, so that the scraping member keeps in contact with and abuts against the corresponding disc surface, and stably scrapes the solid crystals.

[0015] Optionally, the scraping device further includes a plurality of elastic members, and the plurality of elastic members correspond to the plurality of scraping members one by one; Both ends of the elastic member are respectively connected to the fixing plate and the scraping member, and have a tendency to drive the scraping member to move towards the corresponding disc and keep in contact with and abut against the outer wall of the disc.

[0016] By adopting the above technical solution, the scraping member has a tendency to keep in contact with and abut against the corresponding disc surface, and the scraping force of the scraping member on the solid crystals increases, so that the scraping device can maintain a strong scraping effect on the solid crystals for a period of time, saving the labor input of manually adjusting the scraping device according to the wear condition of the scraping member.

[0017] Optionally, the interior of the fixing plate has a sealed space, the sealed space penetrates the fixing plate towards the corresponding disc to form a plurality of moving spaces, and the plurality of moving spaces correspond to the plurality of scraping members one by one; During the process of the scraping member moving relative to the fixing plate, the corresponding moving space can be kept sealed.

[0018] By adopting the above technical solution, when there are firmly adhered solid crystals and the corresponding scraping member fails to scrape them off at once, it will move inward to avoid the solid crystals. At this time, the scraping effect of the corresponding scraping member on the solid crystals will be further enhanced, and at the same time, the scraping effect of other scraping members on the solid crystals will be enhanced to a certain extent, so as to briefly improve the scraping effect of the scraping device on the solid crystals within a certain range.

[0019] Optionally, the multiple spray nozzles on the spray section correspond one by one to the multiple grooves on the corresponding disc, and the spraying direction of the spray nozzles faces the corresponding grooves.

[0020] By adopting the above technical solution, it is convenient for the subsequent leachate to flow along the grooves as the disc rotates, and at the same time, it can effectively reduce the probability that the leachate splashes after being sprayed onto the surface of the corresponding disc, resulting in less leachate remaining on the disc surface.

[0021] Optionally, the diameters of the multiple spray nozzles on the same spray section gradually decrease in the direction towards the axis of the disc.

[0022] By adopting the above technical solution, the leachate sprayed onto the disc surface can be distributed more evenly, so that the leachate on the disc surface can be heated and dried in time, and further improve the efficiency of the leachate being heated and dried.

[0023] Optionally, the spraying direction of the spray nozzle is inclined upward towards the corresponding disc.

[0024] By adopting the above technical solution, the impact force of the leachate when it is sprayed onto the disc surface can be further reduced, thus further reducing the leachate splash, and at the same time, it can further reduce the probability that the leachate fails to be heated and dried in time and leaves the disc under the action of gravity.

[0025] On the other hand, the present application also provides a coating material, adopting the following technical solution: A coating material is used on the above-mentioned garbage leachate disc drying treatment equipment to form a thermal spray coating on the surface of the disc, and it includes tungsten carbide powder and alloy powder.

[0026] In summary, the present application includes at least one of the following beneficial effects: 1. While ensuring the drying effect of the leachate, it can effectively improve the efficiency of discharging solid crystals after the leachate is dried. 2. It can make the leachate sprayed onto the disc surface more evenly distributed, reduce the probability that the leachate fails to be heated and dried in time and leaves the disc under the action of gravity, so as to effectively improve the efficiency and effect of the leachate being heated and dried. 3. It can maintain a high scraping effect on solid crystals within a certain period of time, thereby effectively improving the reliability of the scraping device to scrape and discharge the solid crystals on the disc surface. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of a disc drying treatment device for landfill leachate in Embodiment 1; Figure 2 is Figure 1 a partial cross-sectional view along the direction of line A-A (the base is omitted); Figure 3 is Figure 1 a cross-sectional view along the direction of line B-B (the liquid pump is briefly shown); Figure 4 is a schematic structural diagram of the structure installed in the treatment space in Embodiment 1; Figure 5 is Figure 4 an enlarged view at C in; Figure 6 is a schematic diagram of the internal partial structure of the scraping device in Embodiment 1.

[0028] Description of the Reference Numerals: 1. Housing; 11. Base; 12. Treatment Space; 13. Exhaust Port; 14. Drainage Port; 15. Waste Discharge Port; 2. Disc; 21. Groove; 3. Heating Device; 31. Heating Tube; 311. Cavity; 312. Through Hole; 313. Inlet; 314. Outlet; 32. Partition; 4. Driving Device; 5. Spraying Device; 51. Storage Tank; 52. Liquid Pump; 53. Spraying Pipe; 531. Spraying Section; 532. Spraying Nozzle; 6. Scraping Device; 61. Fixed Plate; 611. Barrier; 612. Sealed Space; 613. Activity Space; 62. Scraping Member; 63. Elastic Member. Detailed Description of the Embodiments

[0029] The following is a further detailed description of the present application in conjunction with the attached Figures 1-6 drawings.

[0030] Embodiment 1: The embodiment of the present application discloses a disc drying treatment device for landfill leachate, which is used to treat landfill leachate and can obtain solid crystals and gas by heating and drying the landfill leachate, and discharge the solid crystals and gas separately for harmless treatment.

[0031] Refer to Figure 1 and Figure 2, The garbage leachate disk drying treatment equipment includes a housing 1, a plurality of disks 2, a heating device 3, a driving device 4, a spraying device 5 and a scraping device 6. Among them, the housing 1 serves as an installation carrier for other structures and also provides a place for the garbage leachate to be heated and dried; the disks 2 serve as a heat transfer medium for the garbage leachate to be heated and dried on their surfaces; the heating device 3 is used to transfer heat to the plurality of disks 2; the driving device 4 is used to drive the plurality of disks 2 to rotate, facilitating the uniform distribution of the garbage leachate on the disks 2 and then uniformly heated and dried; the spraying device 5 is used to spray the garbage leachate onto the surface of the disks 2; the scraping device 6 is used to scrape the solid crystals on the surface of the disks 2 and then guide their discharge.

[0032] Refer to Figure 1 and Figure 3 , The housing 1 is generally in a cuboid structure. The bottom of the housing 1 has a base 11 that elevates its main body, and the housing 1 is placed on the ground through the base 11; the interior of the housing 1 has a treatment space 12 for the garbage leachate to be heated and dried. The top of the housing 1 is provided with an exhaust port 13 for the gas generated after the garbage leachate is heated and dried to be discharged. The bottom of the housing 1 has a drain port 14 for the excess garbage leachate to be discharged. One side in the width direction of the housing 1 has a waste discharge port 15 for the solid crystals to be discharged, and the exhaust port 13, the drain port 14 and the waste discharge port 15 are all communicated with the treatment space 12.

[0033] Refer to Figure 2 and Figure 3 , The heating device 3 includes a heating pipe 31 and a partition 32. Among them, the heating pipe 31 is used for the transportation and movement of the heating medium; the partition 32 is used to separate the heating medium from the substance formed after the heat of the heating medium is utilized.

[0034] The heating pipe 31 is generally in a hollow cylinder structure. The heating pipe 31 is installed through the housing 1, and its axis is parallel to the length direction of the housing 1; the interior of the heating pipe 31 has a cavity 311. A plurality of disks 2 are fixedly installed on the heating pipe 31 and are located in the treatment space 12. The axis of the disk 2 coincides with the axis of the heating pipe 31, and the plurality of disks 2 are equally spaced along the axis direction of the heating pipe 31; a number of through holes 312 are provided on the outer side of the heating pipe 31 to communicate the cavity 311 with the internal space of the plurality of disks 2; both ends in the axis direction of the heating pipe 31 respectively have an inlet 313 for steam to enter and an outlet 314 for the condensed water generated after the heat of the steam is utilized to flow out.

[0035] The heating pipe 31 can rotate relative to the housing 1. The rotation axis of the heating pipe 31 coincides with its own axis, and during the rotation of the heating pipe 31, the plurality of disks 2 will also rotate synchronously with it.

[0036] The partition plate 32 is fixedly installed on the heating pipe 31 and is located in the cavity 311. It is installed obliquely with respect to the axis of the heating pipe 31, and a plurality of through holes 312 on the heating pipe 31 are distributed on both sides close to the same long side of the partition plate 32. When the heating device 3 operates and the heating pipe 31 rotates in the required direction (such as Figure 3 shown), at this time, the steam entering the cavity 311 through the inlet 313 can enter the internal spaces of the plurality of discs 2 respectively through the plurality of through holes 312 on one side of the partition plate 32, so that heat can be transferred to the surfaces of the plurality of discs 2; when the heat of the steam is transferred and absorbed to become condensed water, the condensed water inside the plurality of discs 2 will be able to flow into the cavity 311 through the plurality of through holes 312 on the other side of the partition plate 32, and then flow out through the outlet 314. In this embodiment, the instrument for manufacturing steam and the instrument for recovering condensate are omitted from the expression.

[0037] Referring to Figure 1 and Figure 2 , the driving device 4 is fixedly installed on one side in the length direction of the housing 1 and can drive the heating pipe 31 to rotate relative to the housing 1 in the required direction (such as Figure 3 shown). In this embodiment, it is preferably a structure composed of a motor and a belt drive mechanism for the driving device 4; and it is preferably located at a position close to the outlet 314 of the heating pipe 31 in the length direction of the housing 1; since the driving device 4 with the above functions is a common prior art, it will not be described in detail here, and it is only briefly shown in the drawings.

[0038] Referring to Figure 1 and Figure 3 , the spraying device 5 includes a storage tank 51, a spraying pipe 53 and two liquid pumps 52. Among them, the storage tank 51 is used to store the landfill leachate; the spraying pipe 53 is used to spray the landfill leachate onto the surface of the disc 2; and the liquid pump 52 is used to drive the landfill leachate to flow along the pipeline.

[0039] The storage tank 51 is placed on one side of the housing 1. The storage tank 51 is fixedly connected to the housing 1 through a pipeline and communicates with the drain port 14. At the same time, it is connected and communicated with the spraying pipe 53 through a pipeline; the two liquid pumps 52 correspond one by one to the two pipelines connected to the storage tank 51, and are used to control the landfill leachate that is not heated and dried in time in the treatment space 12 to be sent into the storage tank 51 for recovery through the pipeline, or to control the landfill leachate in the storage tank 51 to be sent into the spraying pipe 53 through the pipeline and finally sprayed onto the surface of the disc 2 to be heated and dried.

[0040] Referring to Figure 1 and Figure 4 , in this embodiment, since the above-mentioned housing 1, the plurality of discs 2, the heating device 3, the driving device 4 and the storage tank 51 and the liquid pump 52 in the spraying device 5 are all prior arts in this field, they will not be described in detail here, and they are only briefly shown in the drawings.

[0041] Referring to Figure 4 and Figure 6 For the convenience of heat transfer from the disc 2 to the leachate on the surface of the disc 2, it is preferable that a plurality of grooves 21 are distributed on both the inner wall and the outer wall on both sides of the axis direction of the disc 2, forming a concave-convex surface to expand the contact area between the steam and the leachate and the disc 2, so as to effectively improve the effect of heat drying the leachate. In this embodiment, it is preferable that the wall thickness in the axis direction of the disc 2 is uniform, so that the heat distribution transferred to the disc 2 by the steam is uniform, and thus it is convenient for the leachate to be heated evenly on the surface of the disc 2.

[0042] Referring to Figure 4 and Figure 5 The groove 21 is an annular groove, the axis of the groove 21 coincides with the axis of the disc 2, and the distance between adjacent grooves 21 is equal, so that the distribution of the plurality of grooves 21 presents a concentric circle pattern. In this embodiment, it is preferable that a fillet is provided at the connection position between adjacent grooves 21 of the disc 2, so that the position between adjacent grooves 21 of the disc 2 has a cambered surface convex structure.

[0043] Referring to Figure 1 and Figure 3 The spray pipe 53 passes through the housing 1 and is fixedly connected to the housing 1. The position where the spray pipe 53 is located is lower than the axis of the disc 2 and is located on the side of the axis of the disc 2 along the horizontal direction away from the waste discharge port 15.

[0044] Referring to Figure 3 and Figure 4 The part of the spray pipe 53 located in the treatment space 12 extends in the direction close to the axis of the disc 2 with a plurality of spray sections 531. The number of the spray sections 531 is twice the number of the discs 2. Each disc 2 corresponds to two spray sections 531 for spraying the leachate onto its surface, and the two spray sections 531 are respectively located on both sides of the axis direction of the corresponding disc 2, and the leachate is respectively sprayed onto the outer walls on both sides of the axis direction of the corresponding disc 2.

[0045] The projection of the axis of the spray section 531 on the outer wall of the corresponding disc 2 in the axis direction of the disc 2 coincides with a certain radius line of the disc 2 and can just completely fall onto the corresponding disc 2, and the length direction of the spray section 531 is inclined downward relative to the horizontal direction in the direction away from the waste discharge port 15.

[0046] Referring to Figure 4 and Figure 5, a plurality of spray nozzles 532 are formed in the spray pipe 53 on the spray section 531. The plurality of spray nozzles 532 are equidistantly distributed along the length direction of the spray section 531 on the spray section 531, and the plurality of spray nozzles 532 correspond one-to-one to the plurality of grooves 21 on the corresponding disc 2; the spray direction of the spray nozzles 532 is aligned with the corresponding grooves 21 on the adjacent side of the corresponding disc 2, so that the spray pipe 53 can mainly spray the leachate into the grooves 21 on the surface of the disc 2.

[0047] At this time, since the plurality of discs 2 keep rotating during the spraying of the leachate, among the leachate sprayed onto the surface of the disc 2, part of the leachate will directly enter the groove 21, and the rest of the leachate will flow along the surface of the disc 2 under its own gravity and enter the groove 21; among the leachate that enters the groove 21, part of the leachate can be directly heated and dried at its position, and the excess leachate will flow downward along the groove 21 under its own gravity, so that the leachate in the groove 21 can be evenly distributed as the disc 2 rotates, so that the leachate can be evenly heated and dried, and the utilization rate of the heat on the disc 2 can be improved.

[0048] Further, preferably, the spray direction of the spray nozzles 532 is inclined upward toward the surface of the corresponding disc 2 with respect to the axis direction of the disc 2.

[0049] At this time, after the leachate is ejected from the spray nozzles 532, under the action of its own gravity, its ejection speed will decrease, so that the probability of the leachate splashing after being ejected onto the surface of the disc 2 can be reduced, and thus more leachate can be effectively ejected onto the surface of the disc 2 to be heated and dried; moreover, the spray direction of the spray nozzles 532 on the surface of the disc 2 is in the same direction as the moving direction of the corresponding position on the surface of the disc 2 during its rotation, so that the probability of the leachate splashing after being ejected onto the surface of the rotating disc 2 can be further reduced, and thus the effect of the leachate being ejected onto the surface of the disc 2 to be heated and dried can be further improved.

[0050] Furthermore, preferably, the diameters of the plurality of spray nozzles 532 are different, and gradually decrease along the length direction of the spray section 531 toward the direction close to the axis of the disc 2.

[0051] At this time, during the spraying of the garbage leachate, the amount of garbage leachate sprayed through the spray port 532 close to the axis of the disk 2 will be less than the amount of garbage leachate sprayed through the spray port 532 far from the axis of the disk 2; correspondingly, the area on the surface of the disk 2 for spraying the garbage leachate through the spray port 532 close to the axis of the disk 2 is smaller, and the area on the surface of the disk 2 for spraying the garbage leachate through the spray port 532 far from the axis of the disk 2 is larger, so that the garbage leachate can be more evenly distributed on the surface of the disk 2 after spraying, so that the garbage leachate sprayed onto the surface of the disk 2 can be heated and dried in time, and the heat transferred to the surface of the disk 2 can be fully utilized.

[0052] Reference Figure 3 and Figure 4 The scraping device 6 includes a plurality of fixed plates 61 and a plurality of scraping members 62. The fixed plates 61 serve as mounting carriers for the plurality of scraping members 62; and the scraping members 62 are used to contact the surface of the disc 2 to scrape off the solid crystals formed after the landfill leachate is heated and dried.

[0053] Reference Figure 4 and Figure 6 The number of the fixing plates 61 is also twice the number of the disks 2 , and two fixing plates 61 are correspondingly installed on both sides of the axis direction of each disk 2 , and the two fixing plates 61 are symmetrically distributed relative to the corresponding disk 2 .

[0054] The fixed plate 61 is a rectangular plate-shaped structure as a whole, and is located in the processing space 12 as a whole. One end of the fixed plate 61 in the length direction is fixedly connected to the inner wall of the shell 1. Its position is lower than the axis of the disk 2 and is located on the side of the axis of the disk 2 close to the waste outlet 15; the projection of the fixed plate 61 in the length direction along the axis direction of the disk 2 on the outer wall of one side of the corresponding disk 2 coincides with a certain radius line of the disk 2, and the length direction of the fixed plate 61 is inclined upward relative to the horizontal direction in the direction away from the waste outlet 15.

[0055] A plurality of scrapers 62 are correspondingly mounted on each fixed plate 61. The scrapers 62 are mounted on one side of the fixed plate 61 close to the corresponding disc 2, and the plurality of scrapers 62 correspond to the plurality of grooves 21 on the surface of the corresponding disc 2. The shape of the end of the scraper 62 close to the corresponding disc 2 is adapted to the shape of the surface of the disc 2 where the grooves 21 are located, and can fit against the concave and convex surface of the disc 2. When the garbage leachate is heated and dried on the surface of the disc 2 to form solid crystals, as the disc 2 rotates, the plurality of scrapers 62 will contact the solid crystals on the surface of the disc 2 and scrape them off. The scraped solid crystals will move and be discharged along the surface of the plurality of scrapers 62 or the surface of the corresponding fixed plate 61 in the direction close to the waste outlet 15 under the action of their own gravity. In this embodiment, the structures of the scrapers 62 are preferably the same, so that the staff can replace the scrapers 62 when some of them are damaged and cannot be used.

[0056] Referring to Figure 3 and Figure 6 , further, to improve the reliability of the solid crystals being scraped off and then moving under the guidance of multiple scraping members 62 and the corresponding fixing plates 61 and being discharged through the waste discharge port 15, preferably, a retaining strip 611 that protrudes upward is provided on the side of the fixing plate 61 away from the corresponding multiple scraping members 62 in the width direction, which can effectively prevent the scraped solid crystals from falling from the side of the fixing plate 61 away from the corresponding multiple scraping members 62; and preferably, the portions of the adjacent scraping members 62 on the same fixing plate 61 that are in contact with the surface of the disc 2 are smooth and in abutting contact, which can improve the smoothness of the scraped solid crystals moving along the surfaces of the multiple scraping members 62, and at the same time can effectively reduce the probability of the scraped solid crystals getting stuck in the gaps between the adjacent scraping members 62.

[0057] Referring to Figure 4 and Figure 6 , further, since the scraping member 62 will be worn during the process of scraping the solid crystals on the surface of the disc 2, a gap is likely to be formed between the worn scraping member 62 and the surface of the disc 2, resulting in the scraping effect of the scraping member 62 on the solid crystals being affected.

[0058] For this reason, preferably, the scraping member 62 is movably connected to the fixing plate 61, and the scraping device 6 further includes a plurality of elastic members 63 that can drive the scraping member 62 to move. The moving direction of the scraping member 62 and the fixing plate 61 is parallel to the width direction of the fixing plate 61. The elastic members 63 are installed inside the fixing plate 61. A plurality of elastic members 63 are installed on the fixing plate 61 and the plurality of elastic members 63 correspond to the plurality of corresponding scraping members 62 one by one.

[0059] Both ends of the elastic member 63 are fixedly connected to the fixing plate 61 and the corresponding scraping member 62 respectively, and have a tendency to drive the scraping member 62 to move away from the corresponding fixing plate 61 and keep the scraping member 62 in abutting contact with the corresponding surface of the disc 2. In this embodiment, preferably, the elastic member 63 is a compression spring.

[0060] At this time, when the scraping member 62 scrapes the solid crystals on the surface of the disc 2, the acting force exerted by the elastic member 63 on the scraping member 62 can improve the scraping effect of the scraping member 62 on the solid crystals; at the same time, when the scraping member 62 is worn, the acting force of the elastic member 63 on the scraping member 62 can make it move to ensure its abutting contact with the surface of the corresponding disc 2, so that the scraping member 62 can maintain a relatively high scraping effect on the solid crystals for a certain period of time.

[0061] Furthermore, in order to reduce the probability of damage to the scraping member 62 during the process of scraping solid crystals, and at the same time further improve the scraping effect of the scraping member 62 on the solid crystals on the surface of the disc 2, it is preferred that there is a linkage relationship between multiple scraping members 62 on the same fixing plate 61.

[0062] The inside of the fixing plate 61 has a sealed space 612. The sealed space 612 penetrates through one side of the fixing plate 61 close to the corresponding disc 2 to form a plurality of moving spaces 613. The plurality of moving spaces 613 correspond to the corresponding plurality of scraping members 62 one by one. One end of the scraping member 62 away from the corresponding disc 2 is located in the corresponding moving space 613, and during the movement of the scraping member 62, it can keep blocking the end of the moving space 613 away from the corresponding sealed space 612, so that the sealed space 612 remains sealed, and the plurality of moving spaces 613 can communicate with each other through the sealed space 612.

[0063] When there are firmly attached solid crystals on the surface of the disc 2, the scraping member 62 that scrapes them will move towards the direction close to the corresponding fixing plate 61 against the acting force of the corresponding elastic member 63 when it contacts them and fails to scrape them; during this process, the acting force of the corresponding elastic member 63 on the scraping member 62 will increase, and the resistance of the air pressure that the scraping member 62 needs to overcome during movement will also exert an acting force on it, so that the scraping member 62 has a greater tendency to move back to its original position, and exerts an acting force on the solid crystals on the side of the scraping member 62 close to the corresponding disc 2, replacing scraping with pressing, so that the attachment effect of the originally firmly attached solid crystals on the surface of the disc 2 is reduced, facilitating subsequent scraping of them; At the same time, during the process of the scraping member 62 moving towards the direction close to the corresponding fixing plate 61, it can, through the air pressure action inside the fixing plate 61, make other scraping members 62 on the same fixing plate 61 have a tendency to move away from the corresponding fixing plate 61, so as to further improve the scraping effect of other scraping members 62 on solid crystals; after the scraping member 62 moves back to its original position, the moving tendency of other scraping members 62 on the same fixing plate 61 will also disappear.

[0064] The implementation principle of the garbage leachate disc drying treatment equipment in the embodiment of the present application is as follows: The heating device 3 transfers heat to the plurality of discs 2 through steam. At the same time, during the process that the driving device 4 drives the plurality of discs 2 to rotate in the treatment space 12, the spraying device 5 will evenly spray the garbage leachate onto the surface of the corresponding disc 2 through the plurality of spray pipes 53. The garbage leachate will be evenly distributed on the surface of the disc 2, be heated and dried in a timely and sufficient manner to obtain solid crystals and generate gas, and the steam will become condensed water and be discharged after its heat is utilized; Among them, the gas will be discharged through the exhaust port 13 in the treatment space 12; the solid crystals will be scraped off the surface of the rotating disk 2 by the scraping device 6 through a plurality of scraping members 62, and after being scraped off, the solid crystals will move along the plurality of scraping members 62 and the fixing plate 61 and be discharged through the waste discharge port 15; When the leachate sprayed onto the surface of the disk 2 is not dried by heat in time, the excess leachate will drip under its own gravity and be recycled to the storage tank 51 through the drain port 14, and then be sprayed onto the surface of the disk 2 again through a plurality of spray pipes 53 for heat drying.

[0065] Embodiment 2: The embodiment of the present application discloses a coating material, which is used on a leachate disk drying treatment device disclosed in Embodiment 1. It is sprayed on the surface of the disk 2 through a high-speed gas spraying device to form a thermal spray coating, which is convenient for keeping the surface of the disk 2 dry and effectively reducing the probability of leachate adhesion on the surface of the disk 2.

[0066] The coating material includes tungsten carbide powder and alloy powder. Among them, the tungsten carbide powder is the main component of the coating material, and preferably the alloy powder is a composite powder material obtained by 22.2% Hastelloy powder and a thin film coating with a mass ratio (or volume ratio) of 10% covering the surface of the Hastelloy powder particles.

[0067] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A landfill leachate disk drying treatment device, comprising a housing (1), a plurality of disks (2) and a heating device (3), wherein the housing (1) has a treatment space (12) inside, and the housing (1) also has a waste outlet (15) for discharging solid crystals; the plurality of disks (2) are arranged in the treatment space (12) in a manner that their axes coincide and they are distributed at equal intervals; the heating device (3) is capable of passing steam into the interior of the plurality of disks (2) and of discharging liquid formed after the steam is condensed, characterized in that: It also includes a spraying device (5) and a scraping device (6); The spray device (5) comprises a spray pipe (53), the spray pipe (53) being fixedly arranged on the shell (1), one end of which extends into the processing space (12) and is located between adjacent disks (2); the spray pipe (53) has a plurality of spray sections (531) at one end close to the disk (2), each disk (2) corresponding to two spray sections (531), and the two spray sections (531) are respectively located on both sides of the axis direction of the corresponding disk (2); the spray section (531) extends in the radial direction of the disk (2), the spray section (531) has a plurality of spray ports (532), the plurality of spray ports (532) are evenly spaced along the extension direction of the spray section (531), and the spray direction of the spray ports (532) is toward the corresponding disk (2); The scraping device (6) comprises a plurality of fixed plates (61) and a plurality of scraping members (62); each of the disks (2) has two corresponding fixed plates (61), and the two fixed plates (61) are respectively located on both sides of the axis direction of the corresponding disk (2); the fixed plates (61) are located in the processing space (12), the fixed plates (61) extend in the radial direction of the disk (2), and are respectively located on both sides of the axis of the disk (2) with the spray pipe (53); the plurality of scraping members (62) are arranged on a side of the fixed plate (61) close to the corresponding disk (2) and are capable of contacting and abutting against the corresponding disk (2), and the fixed plates (61) are capable of guiding the solid crystals to move in a direction close to the waste outlet (15).

2. The landfill leachate disc drying treatment equipment according to claim 1, characterized in that: The inner wall and the outer wall on both sides of the disc (2) along its own axial direction are both concave and convex surfaces, and the scraping member (62) is adapted to the shape of the outer wall surface of the disc (2).

3. The landfill leachate disc drying treatment equipment according to claim 2, characterized in that: The outer walls of the disk (2) on both sides along its own axial direction are provided with a plurality of grooves (21) in annular tracks, the axes of the grooves (21) coincide with the axes of the disk (2), and the plurality of grooves (21) are distributed at equal intervals along the radial direction of the disk (2).

4. The landfill leachate disc drying treatment equipment according to claim 3 is characterized in that: The scraping member (62) is movably connected to the fixing plate (61), and the moving direction of the scraping member (62) is parallel to the axis of the disc (2).

5. The landfill leachate disc drying treatment equipment according to claim 4, characterized in that: The scraping device (6) further comprises a plurality of elastic members (63), and the plurality of elastic members (63) correspond one-to-one to the plurality of scraping members (62); The two ends of the elastic member (63) are respectively connected to the fixing plate (61) and the scraping member (62), and have a tendency to drive the scraping member (62) to move in a direction close to the corresponding disk (2) so as to keep in close contact with the outer wall of the disk (2).

6. The landfill leachate disc drying treatment equipment according to claim 5, characterized in that: The fixed plate (61) has a sealed space (612) inside, and the sealed space (612) penetrates the fixed plate (61) in a direction close to the corresponding disc (2) to form a plurality of movable spaces (613), and the plurality of movable spaces (613) correspond one-to-one to the plurality of scraping members (62); During the movement of the scraper (62) relative to the fixed plate (61), the corresponding movable space (613) can be kept sealed.

7. The landfill leachate disc drying treatment equipment according to claim 3 is characterized in that: The plurality of spray ports (532) on the spray section (531) correspond one-to-one to the plurality of grooves (21) on the corresponding disc (2), and the spraying direction of the spray ports (532) is toward the corresponding grooves (21).

8. The landfill leachate disc drying treatment equipment according to claim 7, characterized in that: The diameters of the plurality of spray openings (532) on the same spray section (531) gradually decrease in a direction approaching the axis of the disk (2).

9. The landfill leachate disc drying treatment equipment according to claim 7, characterized in that: The spraying direction of the spray port (532) is inclined upwards towards the direction close to the corresponding disk (2).

10. A coating material, used for forming a thermal spray coating on the surface of the disk (2) on a landfill leachate disk drying treatment device as claimed in any one of claims 1 to 9, characterized in that: Includes tungsten carbide powder and alloy powder.

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