Landfill infiltration wastewater treatment device and method

Abstract

The invention discloses a garbage percolation wastewater treatment device and a method thereof, and mainly relates to the technical field of wastewater treatment devices. Comprising a sedimentation tank and a pesticide spraying decontamination assembly, the lower surface of the sedimentation tank is fixedly connected with a plurality of supporting blocks used for supporting the sedimentation tank, the outer wall of the sedimentation tank is fixedly communicated with a drainage pipe used for drainage, and the pesticide spraying decontamination assembly is located on the inner wall of the sedimentation tank and comprises a connecting cylinder and a dirt collecting box used for collecting dirt. The lower end of the connecting cylinder is rotationally connected with the inner wall bottom of the sedimentation tank. The invention has the following beneficial effects: after a flocculating agent solution is added into the sedimentation tank, the flocculating agent can be in full contact with wastewater, so that the flocculating agent is promoted to be combined with suspended solids to form larger flocs, and subsequent sedimentation or filtration is facilitated; and secondly, dirt deposited on the inner wall of the sedimentation tank can be automatically scraped, the effective volume and the wastewater treatment capacity of the sedimentation tank can be kept, the dirt does not need to be manually cleaned, and the labor cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment devices, and particularly relates to a landfill leachate wastewater treatment device and a method thereof. Background Art

[0002] Landfill leachate wastewater treatment devices are mainly used to treat the leachate generated in landfills, and remove pollutants in the wastewater through physical, chemical, and biological methods to ensure that the leachate wastewater meets the discharge standards or can be reused.

[0003] Existing technologies such as the invention with the publication number CN113562880B disclose a landfill leachate wastewater treatment equipment and a treatment process. The key points of its technical solution are as follows: It includes a treatment tank, a support plate, and a second treatment tank. The second treatment tank is installed on the top of the support plate, an air purification pipe is installed on the top of the second treatment tank, a first box is installed on the back of the treatment tank, a disinfection tank is installed on the top of the treatment tank, a cleaning tank is installed on the top of the support plate, a first treatment tank is installed on the top of the support plate, and a trigger is installed on the inner bottom wall of the second treatment tank. In the present invention, by installing an air purification pipe, the air can be purified. The malodorous gas generated by the leachate is discharged from the air purification pipe, the fan drives the air to flow, and then the malodorous gas enters the interior of the fragrance tank through the pipeline. The heating wire heats the fragrance, so that the malodorous gas is mixed with the fragrance to dilute the malodorous gas and achieve the air purification function.

[0004] Regarding the above related content, the following technical defects are found: 1. When treating landfill leachate wastewater in the prior art, the wastewater needs to be first put into the sedimentation tank wall for sedimentation. In order to facilitate the sedimentation operation of the wastewater, a flocculant is added to the sedimentation tank to improve the sedimentation efficiency. After the flocculant is put into the interior of the sedimentation tank, the diffusion speed is slow, and it cannot be fully mixed with the wastewater, which will lead to a decline in the wastewater treatment effect; 2. When the sedimentation tank in the prior art is in use, the dirt at the bottom of the inner wall of the sedimentation tank is inconvenient to clean, and the effective volume of the sedimentation tank and the wastewater treatment capacity cannot be maintained. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages in the prior art that after the flocculant is put into the interior of the sedimentation tank, the diffusion speed is slow, it cannot be fully mixed with the wastewater, which will lead to a decline in the wastewater treatment effect; when the sedimentation tank is in use, the dirt at the bottom of the inner wall of the sedimentation tank is inconvenient to clean, and the effective volume of the sedimentation tank and the wastewater treatment capacity cannot be maintained, and a landfill leachate wastewater treatment device and a method thereof are proposed.

[0006] To achieve the above object, the present invention adopts the following technical solution: A garbage leachate wastewater treatment device, including a sedimentation tank and a chemical spraying and decontamination component. The lower surface of the sedimentation tank is fixedly connected with a plurality of support blocks for supporting the sedimentation tank. The outer wall of the sedimentation tank is fixedly communicated with a drain pipe for draining water. The chemical spraying and decontamination component is located on the inner wall of the sedimentation tank. The chemical spraying and decontamination component includes a connecting cylinder and a dirt collection box for collecting dirt. The lower end of the connecting cylinder is rotatably connected to the bottom of the inner wall of the sedimentation tank. The upper end of the connecting cylinder is provided with a circular hole for injecting a flocculant into the connecting cylinder. The outer wall of the connecting cylinder is fixedly connected with a plurality of scraping plates for scraping the dirt inside the sedimentation tank. The lower surface of the scraping plate is in contact with the bottom of the inner wall of the sedimentation tank. The cross-section of the scraping plate is in the shape of a "C". The scraping plate is arranged in a hollow structure. The inner wall of the scraping plate is communicated with the inner wall of the connecting cylinder. One side of the outer wall of the scraping plate is fixedly communicated with a plurality of spray pipes for spraying the flocculant into the sedimentation tank. The outer wall of the sedimentation tank is provided with an installation hole for placing the dirt collection box. The installation hole is communicated with the inside of the sedimentation tank. The inner wall of the sedimentation tank is in contact with the dirt collection box. The lower surface of the dirt collection box is fixedly connected with an ear plate for driving the dirt collection box to move. The lower surface of the sedimentation tank is fixedly connected with an electric push rod for driving the ear plate to move. The inner wall of the dirt collection box is in contact with a filter screen for separating the dirt and wastewater inside the dirt collection box. The inner wall of the dirt collection box is fixedly connected with a plurality of fixing strips for supporting the filter screen. The filter screen is placed on the upper surface of the fixing strips. The outer wall of the filter screen is in contact with the inner wall of the dirt collection box. One side of the outer wall of the dirt collection box away from the sedimentation tank is fixedly communicated with a connecting hose. The end of the connecting hose away from the dirt collection box is fixedly connected to the outer wall of the sedimentation tank. A water pump is installed inside the dirt collection box for allowing the wastewater inside the dirt collection box to flow into the sedimentation tank along the connecting hose. The outer wall of the dirt collection box is fixedly connected with a first sealing ring. The first sealing ring is in contact with the sedimentation tank. The cross-section of the first sealing ring is in the shape of an "L".

[0007] Preferably, the outer wall of the connecting cylinder is fixedly connected with a conical tooth ring for driving the connecting cylinder to rotate. The upper surface of the sedimentation tank is fixedly connected with a limit bolt. The inner wall of the limit bolt is fixedly connected with a connecting shaft. One end of the connecting shaft is fixedly connected with a conical gear for driving the conical tooth ring to rotate. The conical tooth ring meshes with the conical gear. The outer wall of the sedimentation tank is fixedly connected with a welding plate. One side of the welding plate is fixedly connected with a servo motor for driving the connecting shaft to rotate. The output end of the servo motor is fixedly connected to the end of the connecting shaft away from the conical gear.

[0008] Preferably, the spraying and decontamination component further includes a cylinder and a fixing plate for supporting the cylinder. One side of the fixing plate is fixedly connected to the outer wall of the sedimentation tank. The cylinder is fixedly connected to the side of the fixing plate away from the sedimentation tank. The output end of the cylinder is fixedly connected to a pressing plate for squeezing the dirt on the filter screen, and the size of the pressing plate is adapted to the size of the filter screen.

[0009] Preferably, a plurality of convex spikes are fixedly connected to the upper surface of the scraper, and the convex spikes are arranged in a conical structure.

[0010] Preferably, a plurality of positioning plates are fixedly connected to the lower surface of the dirt collection box. A positioning rod is slidably inserted through the side surface of the positioning plate. One end of the short arm of the positioning rod is fixedly connected to the lower surface of the sedimentation tank, and one end of the long arm of the positioning rod is fixedly connected to a cushion block.

[0011] Preferably, a partition and sealing component is provided on the outer wall of the sedimentation tank. The partition and sealing component includes two partition plates and two mounting plates. The mounting plates are fixed on the outer wall of the sedimentation tank. The cross section of the partition plate is in a semi-circular shape. A connecting plate for driving the partition plate to move is fixedly connected to the upper surface of the partition plate. A lead screw for driving the partition plate to move is threadedly inserted through the surface of the long arm of the connecting plate. The lower end of the lead screw is rotatably connected to the upper surface of the mounting plate. Two motors for driving the lead screw to rotate are fixedly connected to the outer wall of the sedimentation tank. The output end of the motor is fixedly connected to the lead screw. A second sealing ring is fixedly connected to the upper surface of the partition plate, and the second sealing ring is respectively in contact with the inner wall of the sedimentation tank and the outer wall of the connecting cylinder. A guide rod for guiding and limiting the connecting plate is slidably inserted through the surface of the long arm of the connecting plate, and the lower end of the guide rod is fixedly connected to the upper surface of the mounting plate.

[0012] Preferably, the partition and sealing component further includes a positioning ring, and the positioning ring is fixed on the outer wall of the connecting cylinder and is located 10 centimeters above the scraper.

[0013] Preferably, a storage component is provided on the outer wall of the sedimentation tank. The storage component includes a fixing frame. A medicine storage cylinder for storing flocculant is fixedly connected to the inner wall of the fixing frame. The lower end of the medicine storage cylinder is in a conical structure. A medicine outlet hole is opened on the lower surface of the medicine storage cylinder, and the medicine outlet hole is communicated with the inside of the medicine storage cylinder. A fixing seat is fixedly connected to the lower surface of the medicine storage cylinder. An adapter plate is rotatably connected to the inner wall of the fixing seat. A sealing plate for sealing the medicine outlet hole is fixedly connected to one side of the adapter plate. The diameter of the sealing plate is larger than the diameter of the medicine outlet hole. A sealing gasket for improving the sealing performance between the sealing plate and the medicine storage cylinder is fixedly connected to the upper surface of the sealing plate. A driving motor for driving the adapter plate to rotate is fixedly connected to one side of the fixing seat, and the output end of the driving motor is fixedly connected to the adapter plate.

[0014] Preferably, the medicine storage cylinder is specifically an acrylic cylinder.

[0015] A method for treating landfill leachate wastewater includes the following steps: S1, the landfill leachate wastewater first passes through a grille to remove large particulate impurities, then enters an adjustment tank to balance the water quality and quantity, and subsequently the wastewater is introduced into a sedimentation tank, where suspended solids are removed by gravitational sedimentation; S2, the wastewater enters an anaerobic reactor, and under the action of anaerobic microorganisms, organic matter is degraded into methane and carbon dioxide, while reducing the COD; S3, the wastewater enters an aerobic reactor, and aerobic microorganisms further degrade organic matter and convert ammonia nitrogen into nitrate through nitrification; S4, in the denitrification tank, nitrate is reduced to nitrogen to complete the denitrification process; S5, the biologically treated wastewater enters a membrane separation system, and ultrafiltration, nanofiltration or reverse osmosis membranes remove dissolved organic matter and salts; S6, the wastewater passes through an activated carbon adsorption tower to remove refractory organic matter and color; S7, the photocatalytic oxidation technology is adopted to further degrade refractory organic matter to ensure that the effluent water quality meets the standards.

[0016] In summary, the beneficial effects of the present invention are as follows: In the present invention, two effects are achieved by setting the medicine spraying and decontamination component: First, after adding the flocculant solution to the sedimentation tank, the flocculant can be fully contacted with the wastewater, promoting the combination of the flocculant and suspended matter to form larger flocs, which is convenient for subsequent sedimentation or filtration; Second, the dirt deposited on the inner wall of the sedimentation tank can be automatically scraped off, which can maintain the effective volume of the sedimentation tank and the wastewater treatment capacity, and there is no need for manual cleaning of the dirt, reducing the labor cost.

[0017] In the present invention, two effects are achieved by setting the partition and sealing component: First, it can play a role in sealing the sedimentation tank, thereby minimizing the emission of foul odors when the wastewater precipitates inside the sedimentation tank; Second, the sedimentation tank can be divided into two spaces, a larger space above the partition board and a smaller space below the partition board, enabling the medicine spraying and decontamination component to perform the operation of scraping dirt in the smaller space below the partition board, avoiding the mixing of dirt and the settled wastewater during the process of scraping dirt.

[0018] In the present invention, by setting the material storage component, personnel can pour the flocculant solution into the medicine storage cylinder in advance, enabling the subsequent operation of adding the flocculant solution to be automated, reducing the number of times personnel come into contact with chemicals, and improving the practicality of the landfill leachate wastewater treatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Appendix Figure 1It is a schematic diagram of the three-dimensional structure of the present invention; Appendix Figure 2 It is a schematic diagram of the partial structure of the present invention; Appendix Figure 3 It is a schematic diagram of the structure of the medicine spraying and decontamination component of the present invention; Appendix Figure 4 It is a schematic diagram of the partial structure of the medicine spraying and decontamination component of the present invention; Appendix Figure 5 It is a schematic diagram of the partial structure below the sedimentation tank of the present invention; Appendix Figure 6 It is of the present invention Figure 5 Enlarged view of part A; Appendix Figure 7 It is a schematic diagram of the disassembled partial structure of the medicine spraying and decontamination component of the present invention; Appendix Figure 8 It is a schematic diagram of the structure of the partition sealing component of the present invention; Appendix Figure 9 It is a schematic diagram of the structure of the material storage component of the present invention; Appendix Figure 10 It is a schematic diagram of the partial structure of the material storage component of the present invention; Appendix Figure 11 It is a schematic diagram of the structure of the material storage cylinder in the material storage component of the present invention.

[0020] Reference numerals shown in the drawings: 1, sedimentation tank; 2, support block; 3, medicine spraying and decontamination component; 301, connecting cylinder; 302, scraper; 303, round hole; 304, spray pipe; 305, convex thorn; 306, conical tooth ring; 307, limit bolt; 308, connecting shaft; 309, bevel gear; 310, welding plate; 311, servo motor; 312, mounting hole; 313, sewage collection box; 314, first sealing ring; 315, filter screen; 316, fixing strip; 317, connecting hose; 318, electric push rod; 319, ear plate; 320, positioning plate; 321, positioning rod; 322, cushion block; 323, fixing plate; 324, cylinder; 325, pressing plate; 4, partition sealing component; 41, partition board; 42, second sealing ring; 43, connecting plate; 44, lead screw; 45, mounting plate; 46, motor; 47, guide rod; 48, positioning ring; 5, material storage component; 51, fixing frame; 52, medicine storage cylinder; 53, medicine outlet hole; 54, fixing seat; 55, connecting plate; 56, sealing plate; 57, driving motor; 58, sealing gasket; 6, drain pipe. Detailed implementation manners

[0021] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0022] Referring to Figure 1 and Figure 2 As shown, the present invention provides a technical solution: a garbage leachate wastewater treatment device and its method, including a sedimentation tank 1 and a chemical spraying and decontamination component 3. A plurality of support blocks 2 for supporting the sedimentation tank 1 are fixedly connected to the lower surface of the sedimentation tank 1, and a drain pipe 6 for draining water is fixedly communicated with the outer wall of the sedimentation tank 1.

[0023] Among them, the chemical spraying and decontamination component 3 is located on the inner wall of the sedimentation tank 1, a partition and sealing component 4 is provided on the outer wall of the sedimentation tank 1, and a material storage component 5 is provided on the outer wall of the sedimentation tank 1.

[0024] The specific settings and functions of its chemical spraying and decontamination component 3, partition and sealing component 4, and material storage component 5 will be specifically described below.

[0025] Referring to Figures 3 to 7As shown in the figure, in this implementation: The chemical spraying and dirt removal component 3 includes a connecting cylinder 301 and a dirt collection tank 313 for collecting dirt. The lower end of the connecting cylinder 301 is rotatably connected to the bottom of the inner wall of the sedimentation tank 1. The upper end of the connecting cylinder 301 is provided with a circular hole 303 for injecting flocculant into the inside of the connecting cylinder 301. A plurality of scraping plates 302 for scraping the dirt inside the sedimentation tank 1 are fixedly connected to the outer wall of the connecting cylinder 301. The lower surface of the scraping plate 302 is attached to the bottom of the inner wall of the sedimentation tank 1. The cross-section of the scraping plate 302 is in the shape of a "C", and the scraping plate 302 is arranged as a hollow structure. The inner wall of the scraping plate 302 is communicated with the inner wall of the connecting cylinder 301. One side of the outer wall of the scraping plate 302 is fixedly communicated with a plurality of spray pipes 304 for spraying flocculant into the sedimentation tank 1. An installation hole 312 for placing the dirt collection tank 313 is provided on the outer wall of the sedimentation tank 1. The installation hole 312 is communicated with the inside of the sedimentation tank 1. The inner wall of the sedimentation tank 1 is attached to the dirt collection tank 313. An ear plate 319 for driving the dirt collection tank 313 to move is fixedly connected to the lower surface of the dirt collection tank 313. An electric push rod 318 for driving the ear plate 319 to move is fixedly connected to the lower surface of the sedimentation tank 1. A filter screen 315 for separating the dirt and wastewater inside the dirt collection tank 313 is attached to the inner wall of the dirt collection tank 313. A plurality of fixing bars 316 for supporting the filter screen 315 are fixedly connected to the inner wall of the dirt collection tank 313. The filter screen 315 is placed on the upper surface of the fixing bars 316. The outer wall of the filter screen 315 is attached to the inner wall of the dirt collection tank 313. A connecting hose 317 is fixedly communicated with one side of the outer wall of the dirt collection tank 313 away from the sedimentation tank 1. One end of the connecting hose 317 away from the dirt collection tank 313 is fixedly communicated with the outer wall of the sedimentation tank 1. A water pump for allowing the wastewater inside the dirt collection tank 313 to flow into the sedimentation tank 1 along the connecting hose 317 is installed inside the dirt collection tank 313. A first sealing ring 314 is fixedly connected to the outer wall of the dirt collection tank 313. The first sealing ring 314 is attached to the sedimentation tank 1. The cross-section of the first sealing ring 314 is in the shape of an "L". By setting the chemical spraying and dirt removal component 3, two effects are achieved: First, after injecting the flocculant solution into the sedimentation tank 1, the flocculant can be fully contacted with the wastewater, promoting the combination of the flocculant and the suspended matter to form larger flocs, which is convenient for subsequent sedimentation or filtration; Second, the dirt deposited on the inner wall of the sedimentation tank 1 can be automatically scraped off, which can maintain the effective volume of the sedimentation tank 1 and the wastewater treatment capacity, and there is no need for manual cleaning of the dirt, reducing the labor cost.

[0026] The outer wall of the connecting cylinder 301 is fixedly connected with a conical gear ring 306 for driving the connecting cylinder 301 to rotate. The upper surface of the sedimentation tank 1 is fixedly connected with a limit bolt 307. The inner wall of the limit bolt 307 is fixedly connected with a connecting shaft 308. One end of the connecting shaft 308 is fixedly connected with a conical gear 309 for driving the conical gear ring 306 to rotate. The conical gear ring 306 meshes with the conical gear 309. The outer wall of the sedimentation tank 1 is fixedly connected with a welding plate 310. One side of the welding plate 310 is fixedly connected with a servo motor 311 for driving the connecting shaft 308 to rotate. The output end of the servo motor 311 is fixedly connected with the end of the connecting shaft 308 far from the conical gear 309. Starting the servo motor 311 drives the connecting shaft 308 to rotate. The connecting shaft 308 drives the conical gear 309 to rotate. The conical gear 309 drives the conical gear ring 306 to rotate. The conical gear ring 306 drives the connecting cylinder 301 to rotate, achieving the effect of automatically controlling the rotation of the connecting cylinder 301.

[0027] The chemical spraying and decontamination assembly 3 further includes a cylinder 324 and a fixing plate 323 for supporting the cylinder 324. One side of the fixing plate 323 is fixedly connected with the outer wall of the sedimentation tank 1. The cylinder 324 is fixedly connected with the side of the fixing plate 323 far from the sedimentation tank 1. The output end of the cylinder 324 is fixedly connected with a pressing plate 325 for squeezing the dirt on the filter screen 315. The size of the pressing plate 325 is adapted to the size of the filter screen 315. After the sewage collection tank 313 drives the filter screen 315 to move below the pressing plate 325, start the cylinder 324 to drive the pressing plate 325, so that the pressing plate 325 squeezes the dirt on the filter screen 315, so that the remaining water in the dirt can be further squeezed out. After the squeezed wastewater is mixed with the wastewater inside the sewage collection tank 313, it will flow back into the sedimentation tank 1 along the connecting hose 317.

[0028] A plurality of barbs 305 are fixedly connected to the upper surface of the scraper 302. The barbs 305 are arranged in a conical structure. The barbs 305 can puncture the foam in the wastewater, enabling the flocculant solution to be more fully mixed with the wastewater.

[0029] A plurality of positioning plates 320 are fixedly connected to the lower surface of the sewage collection tank 313. A positioning rod 321 is slidably inserted through the side surface of the positioning plate 320. One end of the short arm of the positioning rod 321 is fixedly connected with the lower surface of the sedimentation tank 1. One end of the long arm of the positioning rod 321 is fixedly connected with a cushion block 322. When the electric push rod 318 drives the sewage collection tank 313 to move, the positioning plate 320 fixed on the lower surface of the sewage collection tank 313 will move along the arc surface of the positioning rod 321, thereby improving the stability of the movement process of the sewage collection tank 313.

[0030] Refer to Figure 8As shown in the figure, in this embodiment: The partition sealing assembly 4 includes two partition plates 41 and two mounting plates 45. The mounting plates 45 are fixed to the outer wall of the sedimentation tank 1. The cross-section of the partition plate 41 is a semi-circle. A connecting plate 43 for driving the movement of the partition plate 41 is fixedly connected to the upper surface of the partition plate 41. A lead screw 44 for driving the movement of the partition plate 41 is threadedly penetrated through the surface of the long arm end of the connecting plate 43. The lower end of the lead screw 44 is rotatably connected to the upper surface of the mounting plate 45. Two motors 46 for driving the rotation of the lead screw 44 are fixedly connected to the outer wall of the sedimentation tank 1. The output end of the motor 46 is fixedly connected to the lead screw 44. A second sealing ring 42 is fixedly connected to the upper surface of the partition plate 41. The second sealing ring 42 is respectively in contact with the inner wall of the sedimentation tank 1 and the outer wall of the connecting cylinder 301. A guide rod 47 for guiding and limiting the connecting plate 43 is slidably penetrated through the surface of the long arm end of the connecting plate 43. The lower end of the guide rod 47 is fixedly connected to the upper surface of the mounting plate 45. By setting the partition sealing assembly 4, two effects are achieved: Firstly, it can play a role in sealing the sedimentation tank 1, thereby minimizing the escape of foul odors when the wastewater is settling inside the sedimentation tank 1. Secondly, the sedimentation tank 1 can be divided into two spaces, a larger space above the partition plate 41 and a smaller space below the partition plate 41, enabling the chemical spraying and dirt removal assembly 3 to perform the operation of scraping dirt in the smaller space below the partition plate 41, avoiding the mixing of dirt and the settled wastewater during the process of scraping dirt.

[0031] The partition sealing assembly 4 further includes a positioning ring 48. The positioning ring 48 is fixed to the outer wall of the connecting cylinder 301 and is located 10 centimeters above the scraper 302. When the partition plate 41 needs to function as a partition for the internal space of the sedimentation tank 1, by adjusting the upper surface of the partition plate 41 to be in contact with the positioning ring 48, the partition plate 41 can be quickly moved to the designated position.

[0032] Refer to Figures 9 to 11As shown in the figure, in this implementation: The material storage component 5 includes a fixed frame 51. The inner wall of the fixed frame 51 is fixedly connected with a medicine storage cylinder 52 for containing flocculant. The lower end of the medicine storage cylinder 52 is in a conical structure. A medicine outlet hole 53 is opened on the lower surface of the medicine storage cylinder 52. The medicine outlet hole 53 is communicated with the inside of the medicine storage cylinder 52. A fixed seat 54 is fixedly connected to the lower surface of the medicine storage cylinder 52. A connecting plate 55 is rotatably connected to the inner wall of the fixed seat 54. One side of the connecting plate 55 is fixedly connected with a sealing plate 56 for sealing the medicine outlet hole 53. The diameter of the sealing plate 56 is larger than the diameter of the medicine outlet hole 53. A sealing gasket 58 for improving the sealing performance between the sealing plate 56 and the medicine storage cylinder 52 is fixedly connected to the upper surface of the sealing plate 56. A driving motor 57 for driving the connecting plate 55 to rotate is fixedly connected to one side of the fixed seat 54. The output end of the driving motor 57 is fixedly connected to the connecting plate 55. By setting the material storage component 5, personnel can pour the flocculant solution into the medicine storage cylinder 52 in advance, so that the subsequent operation of putting the flocculant solution can be carried out automatically, reducing the number of times personnel come into contact with chemicals and improving the practicability of the garbage leachate wastewater treatment device.

[0033] The medicine storage cylinder 52 is specifically an acrylic cylinder. By setting the medicine storage cylinder 52 as an acrylic cylinder, personnel can see the quantity of the flocculant inside the medicine storage cylinder 52 through the medicine storage cylinder 52.

[0034] Detailed usage method: When the wastewater is settling in the sedimentation tank 1, first pour the flocculant solution into the connecting cylinder 301 along the round hole 303, then start the servo motor 311 to operate. The servo motor 311 drives the connecting shaft 308 to rotate, the connecting shaft 308 drives the bevel gear 309 to rotate, the bevel gear 309 drives the bevel gear ring 306 to rotate, the bevel gear ring 306 drives the connecting cylinder 301 to rotate, and the connecting cylinder 301 drives the scraper 302 and the spray pipe 304 to rotate. At this time, the centrifugal force generated when the scraper 302 rotates will automatically throw the flocculant solution inside the connecting cylinder 301 out along the spray pipe 304. At this time, the flocculant solution will enter the sedimentation tank 1 and mix with the leachate wastewater. At the same time, the scraper 302 will stir the leachate wastewater and the flocculant solution. Stirring ensures that the flocculant is evenly distributed in the wastewater, avoiding too high or too low local concentration, enabling the flocculant to fully contact the wastewater, promoting the combination of the flocculant and the suspended matter, forming larger flocs, which is convenient for subsequent sedimentation or filtration. After the flocculant solution is mixed with the wastewater, the operation of the servo motor 311 can be stopped. When it is necessary to scrape the dirt at the bottom of the inner wall of the sedimentation tank 1 after the wastewater sedimentation is completed, first start the servo motor 311 to drive the connecting shaft 308 to rotate, the connecting shaft 308 drives the bevel gear 309 to rotate, the bevel gear 309 drives the bevel gear ring 306 to rotate, the bevel gear ring 306 drives the connecting cylinder 301 to rotate, and the connecting cylinder 301 drives the scraper 302, so that the scraper 302 moves along the bottom of the inner wall of the sedimentation tank 1, so that the dirt at the bottom of the inner wall of the sedimentation tank 1 can be scraped into the sewage collection box 313. When the dirt enters the inside of the sewage collection box 313, then start the electric push rod 318 to drive the ear plate 319, the ear plate 319 drives the sewage collection box 313 to move, so that the sewage collection box 313 is separated from the installation hole 312. Subsequently, take out the filter screen 315 inside the sewage collection box 313 from the inside of the sewage collection box 313, so as to facilitate the next treatment of the dirt. After the dirt on the filter screen 315 is transferred away, then place the filter screen 315 on the fixing strip 316 on the sewage collection box 313. Subsequently, start the electric push rod 318 to drive the ear plate 319, the ear plate 319 drives the sewage collection box 313, so that the sewage collection box 313 returns to the inner wall of the installation hole 312, and the operation of scraping the dirt can be completed.

[0035] When the partition plate 41 needs to seal the sedimentation tank 1, start two motors 46 simultaneously. The motors 46 drive the lead screws 44 to rotate, and the lead screws 44 drive the connecting plate 43, causing the connecting plate 43 to move under the guiding and positioning of the guide rods 47. The connecting plate 43 drives the partition plate 41. When the two partition plates 41 block the upper opening of the sedimentation tank 1, stop the operation of the motors 46. At this time, the two partition plates 41 can seal the sedimentation tank 1, thereby minimizing the escape of foul odors when the wastewater precipitates inside the sedimentation tank 1. When the partition plate 41 needs to divide the internal space of the sedimentation tank 1, start one of the motors 46 first. This motor 46 drives the lead screw 44 to rotate, and the lead screw 44 drives the connecting plate 43. The connecting plate 43 drives the partition plate 41 to move. When the partition plate 41 fits against the upper surface of the positioning ring 48, stop the operation of this motor 46, and then start the other motor 46 to move the other partition plate 41 above the positioning ring 48. At this time, the two partition plates 41 divide the sedimentation tank 1 into two spaces, a larger space above the partition plate 41 and a smaller space below the partition plate 41, enabling the chemical spraying and dirt removal assembly 3 to perform the operation of scraping dirt in the smaller space below the partition plate 41, and preventing the dirt from being scattered and mixed with the settled wastewater during the process of scraping the dirt.

[0036] Before using the storage component 5, the operator needs to first fill the inside of the chemical storage cylinder 52 with a flocculant solution. When automatic dosing of the flocculant solution into the connecting cylinder 301 is required, start the drive motor 57 to drive the connecting plate 55 first, causing the connecting plate 55 to rotate along the inner wall of the fixed seat 54. When the connecting plate 55 drives the sealing plate 56, the flocculant solution inside the chemical storage cylinder 52 will fall into the connecting cylinder 301 along the chemical storage cylinder 52 and the medicine outlet hole 53 due to its own gravity. When the appropriate amount of flocculant solution has been added, start the servo motor 311 to drive the connecting plate 55 to rotate. The connecting plate 55 drives the sealing plate 56. When the sealing plate 56 drives the sealing gasket 58 to block the medicine outlet hole 53, the automatic feeding operation is completed. Among them, by setting the chemical storage cylinder 52 as an acrylic cylinder, the operator can see the quantity of the flocculant inside the chemical storage cylinder 52.

[0037] A method for treating landfill leachate wastewater includes the following steps: S1, The landfill leachate wastewater first passes through a grille to remove large particulate impurities, then enters an adjustment tank to equalize the water quality and quantity, and subsequently the wastewater is introduced into the sedimentation tank 1, where suspended solids are removed by gravity sedimentation; S2, The wastewater enters an anaerobic reactor, where under the action of anaerobic microorganisms, organic matter is degraded into methane and carbon dioxide, while reducing the COD; S3, The wastewater enters an aerobic reactor, where aerobic microorganisms further degrade organic matter and convert ammonia nitrogen into nitrate through nitrification; S4. In the denitrification tank, nitrates are reduced to nitrogen, completing the nitrogen removal process; S5. The biologically treated wastewater enters the membrane separation system, and ultrafiltration, nanofiltration or reverse osmosis membranes remove dissolved organic matter and salts; S6. The wastewater passes through an activated carbon adsorption tower to remove refractory organic matter and color; S7. The photocatalytic oxidation technology is adopted to further degrade refractory organic matter and ensure that the effluent quality meets the standards.

Claims

1. A garbage leachate wastewater treatment device, comprising a sedimentation tank (1) and a chemical spraying and decontamination component (3), characterized in that: The lower surface of the sedimentation tank (1) is fixedly connected with a plurality of support blocks (2) for supporting the sedimentation tank (1). The outer wall of the sedimentation tank (1) is fixedly communicated with a drain pipe (6) for draining water. The chemical spraying and decontamination assembly (3) is located on the inner wall of the sedimentation tank (1). The chemical spraying and decontamination assembly (3) includes a connecting cylinder (301) and a dirt collection box (313) for collecting dirt. The lower end of the connecting cylinder (301) is rotatably connected to the bottom of the inner wall of the sedimentation tank (1). A circular hole (303) for injecting a flocculant into the connecting cylinder (301) is formed in the upper end of the connecting cylinder (301). A plurality of scraping plates (302) for scraping the dirt inside the sedimentation tank (1) are fixedly connected to the outer wall of the connecting cylinder (301). The lower surface of the scraping plate (302) is in contact with the bottom of the inner wall of the sedimentation tank (1). The cross section of the scraping plate (302) is in a "C" shape. The scraping plate (302) is arranged in a hollow structure. The inner wall of the scraping plate (302) is communicated with the inner wall of the connecting cylinder (301). A plurality of spray pipes (304) for spraying the flocculant into the sedimentation tank (1) are fixedly communicated with one side of the outer wall of the scraping plate (302).

2. The garbage leachate wastewater treatment device according to claim 1, wherein: An installation hole (312) for placing a sewage collection tank (313) is formed in the outer wall of the sedimentation tank (1). The installation hole (312) communicates with the inside of the sedimentation tank (1). The inner wall of the sedimentation tank (1) is in contact with the sewage collection tank (313). An ear plate (319) for driving the sewage collection tank (313) to move is fixedly connected to the lower surface of the sewage collection tank (313). An electric push rod (318) for driving the ear plate (319) to move is fixedly connected to the lower surface of the sedimentation tank (1). A filter screen (315) for separating dirt and wastewater inside the sewage collection tank (313) is in contact with the inner wall of the sewage collection tank (313). A plurality of fixing bars (316) for supporting the filter screen (315) are fixedly connected to the inner wall of the sewage collection tank (313). The filter screen (315) is placed on the upper surface of the fixing bars (316). The outer wall of the filter screen (315) is in contact with the inner wall of the sewage collection tank (313). A connecting hose (317) is fixedly connected to one side of the outer wall of the sewage collection tank (313) away from the sedimentation tank (1). One end of the connecting hose (317) away from the sewage collection tank (313) is fixedly connected to the outer wall of the sedimentation tank (1). A water pump for allowing the wastewater inside the sewage collection tank (313) to flow into the sedimentation tank (1) along the connecting hose (317) is installed inside the sewage collection tank (313). A first sealing ring (314) is fixedly connected to the outer wall of the sewage collection tank (313). The first sealing ring (314) is in contact with the sedimentation tank (1). The cross section of the first sealing ring (314) is in an "L" shape. A conical gear ring (306) for driving the connecting cylinder (301) to rotate is fixedly connected to the outer wall of the connecting cylinder (301). A limit bolt (307) is fixedly connected to the upper surface of the sedimentation tank (1). A connecting shaft (308) is fixedly connected to the inner wall of the limit bolt (307). A conical gear (309) for driving the conical gear ring (306) to rotate is fixedly connected to one end of the connecting shaft (308). The conical gear ring (306) is engaged with the conical gear (309). A welding plate (310) is fixedly connected to the outer wall of the sedimentation tank (1). A servo motor (311) for driving the connecting shaft (308) to rotate is fixedly connected to one side of the welding plate (310). The output end of the servo motor (311) is fixedly connected to the end of the connecting shaft (308) away from the conical gear (309).

3. A garbage leachate wastewater treatment device according to claim 2, characterized in that: The chemical spraying and dirt removing assembly (3) further includes a cylinder (324) and a fixing plate (323) for supporting the cylinder (324). One side of the fixing plate (323) is fixedly connected to the outer wall of the sedimentation tank (1). The cylinder (324) is fixedly connected to the side of the fixing plate (323) away from the sedimentation tank (1). A pressing plate (325) for pressing the dirt on the filter screen (315) is fixedly connected to the output end of the cylinder (324). The size of the pressing plate (325) is adapted to the size of the filter screen (315).

4. The garbage leachate wastewater treatment device according to claim 3, wherein: The upper surface of the scraper (302) is fixedly connected with a plurality of barbs (305), and the barbs (305) are arranged in a conical structure.

5. A garbage leachate wastewater treatment device according to claim 4, characterized in that: The lower surface of the sewage collection tank (313) is fixedly connected with a plurality of positioning plates (320). A positioning rod (321) is slidably inserted through the side surface of the positioning plate (320). One end of the short arm of the positioning rod (321) is fixedly connected with the lower surface of the sedimentation tank (1), and one end of the long arm of the positioning rod (321) is fixedly connected with a cushion block (322).

6. The garbage leachate wastewater treatment device according to claim 5, wherein: A partition sealing assembly (4) is provided on the outer wall of the sedimentation tank (1). The partition sealing assembly (4) includes two partition plates (41) and two mounting plates (45). The mounting plates (45) are fixed on the outer wall of the sedimentation tank (1). The cross-section of the partition plate (41) is a semi-circle. A connecting plate (43) for driving the partition plate (41) to move is fixedly connected to the upper surface of the partition plate (41). A lead screw (44) for driving the partition plate (41) to move is threadedly inserted through the surface of the long arm of the connecting plate (43). The lower end of the lead screw (44) is rotatably connected to the upper surface of the mounting plate (45). Two motors (46) for driving the lead screw (44) to rotate are fixedly connected to the outer wall of the sedimentation tank (1). The output end of the motor (46) is fixedly connected to the lead screw (44). A second sealing ring (42) is fixedly connected to the upper surface of the partition plate (41). The second sealing ring (42) is respectively in contact with the inner wall of the sedimentation tank (1) and the outer wall of the connecting cylinder (301). A guide rod (47) for guiding and limiting the connecting plate (43) is slidably inserted through the surface of the long arm of the connecting plate (43). The lower end of the guide rod (47) is fixedly connected to the upper surface of the mounting plate (45).

7. A garbage leachate wastewater treatment device according to claim 6, characterized in that: The partition sealing assembly (4) further includes a positioning ring (48). The positioning ring (48) is fixed on the outer wall of the connecting cylinder (301), and the positioning ring (48) is located 10 centimeters above the scraper (302).

8. A garbage leachate wastewater treatment device according to claim 7, characterized in that: An outer wall of the sedimentation tank (1) is provided with a material storage assembly (5). The material storage assembly (5) includes a fixing frame (51). An inner wall of the fixing frame (51) is fixedly connected with a medicine storage cylinder (52) for containing a flocculant. A lower end of the medicine storage cylinder (52) is in a conical structure. A medicine outlet hole (53) is formed in a lower surface of the medicine storage cylinder (52). The medicine outlet hole (53) communicates with an interior of the medicine storage cylinder (52). A fixing seat (54) is fixedly connected to the lower surface of the medicine storage cylinder (52). A connecting plate (55) is rotatably connected to an inner wall of the fixing seat (54). A sealing plate (56) for sealing the medicine outlet hole (53) is fixedly connected to one side of the connecting plate (55). A diameter of the sealing plate (56) is larger than a diameter of the medicine outlet hole (53). A sealing gasket (58) for improving a sealing property between the sealing plate (56) and the medicine storage cylinder (52) is fixedly connected to an upper surface of the sealing plate (56). A driving motor (57) for driving the connecting plate (55) to rotate is fixedly connected to one side of the fixing seat (54). An output end of the driving motor (57) is fixedly connected to the connecting plate (55).

9. The garbage leachate wastewater treatment device according to claim 8, characterized in that: The medicine storage cylinder (52) is specifically an acrylic cylinder.

10. A method for treating landfill leachate wastewater, using a landfill leachate wastewater treatment device as described in claim 9, characterized in that, It includes the following steps: S1, The landfill leachate wastewater first removes large particulate impurities through a grille, and then enters an adjustment tank to balance the water quality and water volume. Subsequently, the wastewater is introduced into the sedimentation tank (1), and suspended solids are removed by gravitational sedimentation. S2, The wastewater enters an anaerobic reactor. Under the action of anaerobic microorganisms, organic substances are degraded into methane and carbon dioxide, and at the same time, the COD is reduced. S3, The wastewater enters an aerobic reactor. Aerobic microorganisms further degrade organic substances, and ammonia nitrogen is converted into nitrate through a nitrification reaction. S4, In a denitrification tank, nitrate is reduced to nitrogen, completing the denitrification process. S5, The biologically treated wastewater enters a membrane separation system, and ultrafiltration, nanofiltration or reverse osmosis membranes remove dissolved organic substances and salts. S6, The wastewater passes through an activated carbon adsorption tower to remove refractory organic substances and color. S7, The photocatalytic oxidation technology is adopted to further degrade refractory organic substances to ensure that the effluent water quality meets the standards.

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