Device and method for treating aging garbage leachate

Abstract

The present invention discloses a device for treating leachate from aged garbage, comprising a leachate filter box, a liquid inlet pipe and a liquid outlet pipe, wherein an annular fracture is arranged on the liquid inlet pipe, and the liquid inlet pipe is located at the position of the annular fracture and is covered with an annular filter consisting of two groups of semi-annular filter nets, and the two groups of semi-annular filter nets are provided with a reverse shaping plate and a flushing mechanism on one side away from each other, and a moving mechanism for driving the two groups of semi-annular filter nets to move is arranged in the leachate filter box, and the moving mechanism drives the semi-annular filter nets to move and resist against the reverse shaping plate to cause reverse deformation, and a semi-annular fracture is arranged in the middle of the reverse shaping plate, and the flushing mechanism comprises a blocking body and a flushing nozzle arranged on the blocking body, and a driving structure for driving the blocking body to move up and down is arranged in the leachate filter box, and the present invention separates the annular filter net into two groups of semi-annular filter nets, and flushes after moving the semi-annular filter net and forming a reverse deformation, thereby improving the flushing effect and convenience of the annular filter net and avoiding clogging of the annular filter net.

Description

Technical Field

[0001] The invention relates to the technical field of garbage treatment, and in particular to a device and method for treating aged garbage leachate. Background Art

[0002] Landfills will generate a large amount of leachate during long-term operation. The leachate generated by new landfills has good biodegradability and is relatively easy to treat. However, the leachate from aging landfills has the characteristics of complex water quality, poor biodegradability, imbalanced C / N ratio, gradually decreasing COD value, gradually increasing ammonia nitrogen and total nitrogen, and high conductivity. It is extremely difficult to treat and is a thorny problem in the current landfill leachate treatment industry.

[0003] At present, biological methods are still the main body of landfill leachate treatment technology. The mainstream process is the two-stage A / O+MBR+NF+RO process. The membrane process can stably and effectively ensure that the effluent meets the standards, but it is inevitable to produce a batch of membrane concentrate. Under normal circumstances, the concentrate produced by treating the leachate is about 30~40% of the leachate treatment volume. Many landfills often take the method of returning to the regulating tank for circulation treatment or directly recharging the landfill, causing pollutants to circulate in the landfill. Long-term recharging of the landfill body poses an environmental safety hazard. The recharging of the concentrated liquid into the landfill body causes the liquid level in the body to rise, the body to be unstable, and there are safety hazards such as dam breach; at the same time, after the liquid level rises, the existing anti-seepage measures face the risk of leachate leakage, which seriously affects the smooth and safe operation of the city.

[0004] The Chinese patent with application number 202410151323.4 proposes a device and method for treating old landfill leachate. The device includes a raw water tank, a sequencing batch reactor (SBR), an intermediate water tank, an upflow anaerobic sludge blanket (UASB) and an effluent water tank. The treatment method is mainly to convert organic nitrogen and ammonia nitrogen into nitrite nitrogen and nitrate nitrogen by performing a short-range nitrification reaction in the SBR, and then adjust the pH value and perform anaerobic ammonia oxidation in the UASB to achieve high-efficiency and low-consumption denitrification. However, this technology has certain limitations in practical applications, such as high requirements for influent water quality, complex operation, and relatively high energy consumption.

[0005] The Chinese patent with application number 202310382343.8 provides a device and method for treating aged landfill leachate. The device includes a raw water tank, a catalytic ozone oxidation reactor, an ozone generator, a stabilization water tank, a SNAD integrated reactor and a settling tank. The treatment method involves pretreatment through a catalytic ozone oxidation reactor, and then simultaneous short-range nitrification, anaerobic ammonia oxidation and denitrification in a SNAD integrated reactor to achieve a high-efficiency biological denitrification process with low oxygen aeration and low carbon source consumption. Although this technology has improved the treatment efficiency to a certain extent, there are still problems such as high equipment investment cost and complex operation and maintenance.

[0006] In summary, the current technology still has certain deficiencies in treating aged landfill leachate, such as low treatment efficiency, high energy consumption, complex operation, high investment cost, etc., especially the problem of filtration blockage in the initial process of treating aged landfill leachate, which affects the subsequent process treatment. Therefore, it is necessary to study a new, efficient, low-consumption, easy-to-operate and low-investment-cost device and method for treating aged landfill leachate to solve the above-mentioned technical problems. The present invention is an innovative solution proposed to address these problems. Summary of the invention

[0007] The object of the present invention is to provide a device and method for treating aged landfill leachate to solve the above technical problems.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for treating leachate from aging garbage, comprising a leachate filter box, wherein the leachate filter box is provided with an inlet pipe at the upper part and an outlet pipe at the lower part, the outlet pipe is a three-way pipe, the inlet pipe is located in the inner cavity of the leachate filter box and is provided with an annular fracture, the inlet pipe is located at the position of the annular fracture and is covered with an annular filter screen, the annular filter screen is composed of two semi-annular filter screens spliced ​​together, and the two semi-annular filter screens are provided with a reverse shaping plate and a flushing mechanism on the sides away from each other, a moving mechanism for driving the two semi-annular filter screens to move toward the sides away from or close to each other is provided in the leachate filter box, the moving mechanism drives the semi-annular filter screens to move and resist against the reverse shaping plate to cause reverse deformation, a semi-annular fracture is provided in the middle of the reverse shaping plate, the flushing mechanism comprises a sealing body for sealing the semi-annular fracture and a flushing nozzle arranged on the sealing body, and a driving structure for driving the sealing body to move up and down is provided in the leachate filter box.

[0009] Preferably, side rods are symmetrically provided on both sides of the semi-annular filter screen, guide rods are provided on the tops of the side rods, the leachate filter box is composed of a top plate, a bottom plate and a surrounding side plate arranged between the top plate and the bottom plate, a driving cavity is provided inside the top plate, a movable guide groove connecting the inner cavity of the leachate filter box and the driving cavity is provided at the bottom of the top plate, a guide rod is provided on the top of the side rod to form a sliding connection with the movable guide groove, the movable mechanism is arranged in the driving cavity and drives the guide rod to slide along the movable guide groove, four groups of movable guide grooves are arranged symmetrically in pairs, and are used for the guide rods at the top ends of the side rods on both sides of the two semi-annular filter screens to slide, and the two semi-annular filter screens can move toward the side away from each other and resist against the reverse shaping plate through the cooperation of the guide rods and the movable guide grooves.

[0010] Preferably, the movable guide groove includes symmetrically arranged inclined grooves and straight grooves connected between the two groups of inclined grooves. Positioning plates are symmetrically arranged on both sides of the reverse forming plate. The curvature of the reverse forming plate is the same as that of the liquid inlet pipe. The moving mechanism drives the semi-ring filter screens on both sides to move in opposite directions to the end point so that the side rods fit the positioning plates. The moving mechanism drives the semi-ring filter screens on both sides that are away from each other to move toward the side that is close to each other so that the side rods on the semi-ring filter screens on both sides fit together. The two groups of straight grooves for the sliding of the semi-ring filter screen on one side are arranged in parallel and the distance between the two groups of straight grooves is equal to the width dimension of the semi-ring filter screen when it is fully expanded.

[0011] Preferably, four groups of long plates are provided in the driving chamber corresponding to the four groups of side rods on the annular filter screen, the bottom ends of the long plates are provided with slide grooves, a slide plate is slidably provided in the slide grooves, the top of the guide rod is connected to the slide plate, the moving mechanism includes symmetrically arranged driving rods and a double-headed motor, the driving rod is rotatably arranged in the driving chamber, a rod hole for the driving rod to pass through is provided on the long plate, a first guide shaft is provided in the rod hole, first reciprocating spiral grooves for the first guide shaft to slide are symmetrically provided at both ends in the length direction of the driving rod, and the rotation of one side driving rod drives the two groups of long plates to move in the direction of approaching or moving away from each other, first bevel gears are provided on the output ends on both sides of the double-headed motor, and second bevel gears meshing with the first bevel gears are provided on the driving rods on both sides.

[0012] Preferably, two groups of guide rods are symmetrically arranged at the top ends of the side rods, the top ends of the guide rods are rotatably connected to the slide plates, and two groups of movable guide grooves on the top plate corresponding to the positions of the top ends of each group of side rods are arranged corresponding to the guide rods.

[0013] Preferably, long holes are provided on both sides of the sealing body, and a second reciprocating spiral groove is provided in the long hole. The driving structure includes a rotating rod rotatably arranged on the leachate filter box, the upper end of the rotating rod extends into the driving cavity, and the lower end is inserted into the long hole. A worm gear is provided at one end of the rotating rod located in the driving cavity, and a second guide shaft is provided at one end of the rotating rod located in the long hole to form a sliding connection with the second reciprocating spiral groove. A worm meshingly connected to the worm gear is provided on the driving rod, and a first ratchet and pawl mechanism is provided between the worm and the driving rod. The driving rod includes a slot rod and a light rod, the slot rod is rotatably connected to the light rod, and a second ratchet and pawl mechanism is provided between the slot rod and the light rod, the first ratchet and pawl mechanism and the second ratchet and pawl mechanism are arranged in opposite directions, the first reciprocating spiral groove is arranged on the slot rod, and the worm is arranged on the light rod.

[0014] Preferably, the liquid outlet pipe is provided with a fixed plate at the lower end of the leachate filter box, a water cavity is provided in the sealing body, a piston plate which slides up and down with the water cavity is provided on the top of the fixed plate, a water tank is provided on the top of the leachate filter box, a hose is connected between the water cavity and the water tank, and a one-way valve which only allows water in the water tank to enter the water cavity is provided at the connection between the sealing body and the hose.

[0015] Preferably, a groove is provided on the side of the side rod close to the semi-ring filter, and side plates are provided at both ends of the semi-ring filter. The side plates are slidably arranged in the groove, and a spring is provided in the groove, and one end of the spring is fixed on the end face of the side plate away from the semi-ring filter.

[0016] Preferably, rubber bodies are provided on both side end surfaces of the side rod.

[0017] A method for treating an aged landfill leachate treatment device comprises the following steps:

[0018] Step 1: The aged garbage leachate is homogenized in the regulating tank and then brought to the leachate filter box in the filtration unit to filter and remove large particles of pollutants;

[0019] Step 2: The filtered leachate flows into the UV-ozone reaction tank through the outlet pipe, and the UV lamp effectively enhances the ozone oxidation treatment effect, decomposing the difficult-to-degrade macromolecular organic matter into small molecules;

[0020] Step 3: The wastewater treated by the ozone reaction tank enters the denitrification tank, and denitrifying bacteria reduce the nitrogen (N) in nitrate (NO3−) to nitrogen gas (N2) through a series of intermediate products (NO2−, NO, N2O);

[0021] Step 4: The treated wastewater is pumped into the primary DTRO treatment unit through a self-priming pump, and then enters the secondary DTRO treatment unit for reverse osmosis treatment. The effluent meets the discharge standards, and the membrane concentrates of the two stages are returned to the regulating tank through the DTRO membrane concentrate discharge port, mixed with the raw water and then enter the treatment system again;

[0022] Step 5: After treating the leachate for a cycle, clean the annular filter screen, and continue to treat the leachate from the aged garbage.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] By separating the annular filter into two semi-annular filter screens, the semi-annular filter screens are moved and made to abut against the reverse shaping plate to achieve reverse deformation, and flushing is performed by a flushing nozzle, so that the particle impurities blocking the filter screen can fall more easily, which is beneficial to the cleaning of the annular filter screen;

[0025] Side rods are arranged on both sides of the semi-ring filter, and guide rods are arranged on the tops of the side rods. The guide rods cooperate with the movable guide grooves to drive the side rods to slide toward the side away from each other first, and then move toward the side close to each other, so that the semi-ring filter performs an expansion action and then retracts, so that the semi-ring filter changes regularly, protects the filter, and avoids deformation of the filter;

[0026] A side plate is arranged on the outer side of the semi-ring filter, which is slidably arranged in the groove of the side rod and connected to the side plate through a spring, so that the side rod continuously generates a pre-tightening force on the semi-ring filter to prevent the semi-ring filter from loosening and affecting the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is a schematic diagram of the present invention highlighting the interior of the leachate filter box;

[0030] Figure 3 is a schematic diagram for explaining the present invention highlighting the movable guide groove;

[0031] Figure 4 It is an exploded schematic diagram of the present invention highlighting the plate ring filter, the blocking body and the moving mechanism;

[0032] Figure 5 is an exploded schematic diagram of the present invention highlighting a longboard and a skateboard;

[0033] Figure 6 yes Figure 5 A magnified schematic diagram of part A;

[0034] Figure 7 is a schematic diagram of the present invention highlighting the interior of the driving cavity;

[0035] Figure 8 is a schematic diagram for explaining the present invention, highlighting the first ratchet and pawl mechanism and the second ratchet and pawl mechanism;

[0036] Fig. 9 It is an exploded schematic diagram of the present invention highlighting the side plate and the spring;

[0037] Fig.10 It is a schematic diagram for explaining the decomposition of the annular filter screen into semi-annular filter screens and the reverse deformation of the annular filter screen according to the present invention.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1. Leachate filter box; 101. Top plate; 102. Bottom plate; 103. Side plate; 2. Liquid inlet pipe; 3. Liquid outlet pipe; 4. Annular fracture; 5. Semi-annular filter screen; 6. Semi-annular fracture; 7. Flushing nozzle; 8. Hidden groove; 9. Side rod; 10. Guide rod; 11. Drive cavity; 12. Moving guide groove; 121. Inclined groove; 122. Straight groove; 13. Reverse shaping plate; 14. Long plate; 15. Slide; 16. Slide plate; 17. Double-head motor; 18. Rod hole; 19. First guide shaft; 20. First reciprocating spiral groove; 21. First A bevel gear; 22, a second bevel gear; 23, a driving rod; 24, a blocking body; 25, a long hole; 26, a second reciprocating spiral groove; 27, a rotating rod; 28, a worm wheel; 29, a second guide shaft; 30, a worm; 31, a light rod; 32, a groove rod; 33, a first ratchet and pawl mechanism; 34, a second ratchet and pawl mechanism; 35, a hose; 36, a groove; 37, a side plate; 38, a spring; 39, a rubber body; 40, a water tank; 41, a fixing plate; 42, a piston plate; 43, a water chamber; 44, a positioning plate; 45, a support rod; 46, a sliding mouth. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-10 , the present invention provides a technical solution:

[0042] See also Figure 1-3A device for treating leachate from aging garbage comprises a leachate filter box 1, wherein the leachate filter box 1 is provided with a liquid inlet pipe 2 at the top and a liquid outlet pipe 3 at the bottom, wherein the liquid outlet pipe 3 is a three-way pipe, wherein one end of the three-way pipe is connected to the inner cavity of the leachate filter box 1, and the other two ends of the three-way pipe are located at the outer end of the leachate filter box 1 and are both provided with valves, wherein one end of the three-way pipe is located at the outer end of the leachate filter box 1 and is used to discharge the filtered leachate to the next process for treatment, and the other end is used to discharge the water with particulate impurities after cleaning to the outside when cleaning the annular filter screen. The liquid inlet pipe 2 is located in the inner cavity of the leachate filter box 1 and is provided with an annular fracture 4. The liquid inlet pipe 2 is located at the position of the annular fracture 4 and is covered with an annular filter screen, wherein two groups of liquid outlet pipes 3 are provided and are respectively located on both sides of the annular filter screen, and the leachate passes through the annular filter screen at the annular fracture 4 for filtration, and the annular filter screen is composed of two semi-annular filter screens 5 spliced ​​together, and the two semi-annular filter screens 5 are provided with a reverse shaping plate 13 and a flushing mechanism on the side away from each other, and a moving mechanism for driving the two semi-annular filter screens 5 to move toward the side away from or close to each other is provided in the leachate filter box 1, and the moving mechanism drives the semi-annular filter screens 5 to move and resist against the reverse shaping plate 13 to cause reverse deformation, and the reverse shaping plate 13 is provided in the middle. The semi-ring fracture 6, the flushing mechanism includes a blocking body 24 for blocking the semi-ring fracture 6 and a flushing nozzle 7 arranged on the blocking body 24, and a hidden groove 8 for hiding the flushing nozzle 7 is arranged on the blocking body 24. The flushing nozzle 7 is arranged in multiple groups along the side of the hidden groove 8, which can be used for flushing with the arc of the semi-ring filter 5 after the direction deformation. After the semi-ring filter 5 moves to one side of the flushing nozzle 7 and the upper and lower ends are fitted with the reverse shaping plate 13 to cause reverse deformation, the arc surface of one side of the semi-ring filter 5 used for filtering changes from the inner side of the arc to the outer side of the arc, which increases the filter hole of the end face of one side of the semi-ring filter 5 used for filtering, so that the particulate impurities blocked on the semi-ring filter 5 are more easily flushed down when the flushing nozzle 7 is flushed. A driving structure for driving the plugging body 24 to move up and down is provided in the leachate filter box 1. The plugging body 24 is in the position of closing the semi-ring fracture 6 in the initial state. At this time, the flushing nozzle 7 is blocked by the reverse shaping plate 13 to avoid contact with the leachate. When the semi-ring filter 5 needs to be cleaned, the driving structure drives the plugging body 24 to move downward, so that the flushing nozzle 7 passes through the semi-ring fracture 6 and flushes the semi-ring filter 5. The state in which the annular filter is decomposed into two semi-ring filter 5 and reversely deformed is referred to in Fig.10 .

[0043] See also Figure 3 , 47. In order to stabilize the reverse deformation process of the semi-annular filter 5, side rods 9 are symmetrically arranged on both sides of the semi-annular filter 5, and guide rods 10 are arranged on the top of the side rods 9. The leachate filter box 1 is composed of a top plate 101, a bottom plate 102 and a surrounding side plate 103 arranged between the top plate 101 and the bottom plate 102. A driving cavity 11 is arranged inside the top plate 101, and a moving guide groove 12 connecting the inner cavity of the leachate filter box 1 and the driving cavity 11 is arranged at the bottom of the top plate 101. A guide rod 10 that forms a sliding connection with the moving guide groove 12 is arranged on the top of the side rod 9. The moving mechanism is arranged in the driving cavity 1 1 and drives the guide rod 10 to slide along the movable guide groove 12. The movable guide groove 12 is provided with four groups and is symmetrically arranged in pairs, and is used for the guide rods 10 at the top ends of the side rods 9 on both sides of the two semi-annular filter screens 5 to slide. The two semi-annular filter screens 5 can move toward the side away from each other and abut against the reverse shaping plate 13 through the cooperation of the guide rod 10 and the movable guide groove 12. The semi-annular filter screen 5 can realize the transformation of stably unfolding the two sides and then stably retracting them through the cooperation of the guide rod 10 and the movable guide groove 12, so that the semi-annular filter screen 5 can maintain a stable shape during the parallel process to avoid distortion and affect the subsequent filtering effect.

[0044] The specific manner in which the semi-annular filter screen 5 is first expanded and then retracted through the cooperation of the guide rod 10 and the movable guide groove 12 is as follows: the movable guide groove 12 includes symmetrically arranged inclined grooves 121 and straight grooves 122 connected between the two groups of inclined grooves 121, and positioning plates 44 are symmetrically arranged on both sides of the reverse shaping plate 13, and the curvature of the reverse shaping plate 13 is the same as that of the liquid inlet pipe 2. The moving mechanism drives the semi-annular filter screens 5 on both sides to move in opposite directions to the end point so that the side rods 9 are attached to the positioning plate 44, and the moving mechanism drives the semi-annular filter screens 5 on both sides that are far away from each other to move toward the side that is close to each other so that the side rods 9 on the semi-annular filter screens 5 on both sides are attached, wherein the straight grooves 122 are symmetrically arranged on both sides of the reverse shaping plate 13. The length is the shortest distance from the reverse shaping plate 13 to the liquid inlet pipe 2. In this way, when the semi-annular filter screen 5 just contacts the reverse shaping plate 13 or the liquid inlet pipe 2, the guide rod 10 just enters the inclined groove 121, so that when the semi-annular filter screen 5 is deformed by abutting against the reverse shaping plate 13 or the liquid inlet pipe 2, it can also be retracted through the cooperation of the guide rod 10 and the inclined groove 121. In addition, two groups of straight grooves 122 for one side of the semi-annular filter screen 5 are arranged in parallel and the distance between the two groups of straight grooves 122 is equal to the width size of the semi-annular filter screen 5 when it is fully expanded, so that when the guide rod 10 passes through the straight groove 122, the side rods 9 on both sides can make the semi-annular filter screen 5 fully expanded.

[0045] See also Figure 4 , 67. The specific structure of the semi-annular filter screen 5 that can be expanded and retracted by moving between the reverse shaping plate 13 and the liquid inlet pipe 2 is as follows: four groups of long plates 14 are provided in the driving chamber 11 corresponding to the four groups of side rods 9 on the annular filter screen, and a slide groove 15 is provided at the bottom of the long plate 14. A slide plate 16 is slidably provided in the slide groove 15. The top of the guide rod 10 is connected to the slide plate 16. The moving mechanism includes a symmetrically arranged driving rod 23 and a double-headed motor 17. The driving rod 23 is rotatably arranged in the driving chamber 11. A rod hole 18 for the driving rod 23 to pass through is provided on the long plate 14. A first guide shaft 19 is provided in the rod hole 18. The two ends of the driving rod 23 in the length direction are symmetrically provided with first guide shafts 19 for sliding. The reciprocating spiral groove 20 and the driving rod 23 on one side rotate to drive the two groups of long plates 14 to move towards or away from each other. A first bevel gear 21 is provided on the output ends of both sides of the double-headed motor 17, and a second bevel gear 22 meshing with the first bevel gear 21 is provided on the driving rods 23 on both sides. When the double-headed motor 17 drives the driving rod 23 to rotate and the long plate 14 moves linearly and the guide rod 10 passes through the inclined groove 121, the slide plate 16 will move in the slide groove 15, so that the guide rod 10 can slide along the inclined groove 121 without getting stuck, so that the semi-annular filter screen 5 can be expanded and retracted while moving between the reverse shaping plate 13 and the liquid inlet pipe 2.

[0046] See also Figure 5 , 6 7. Two groups of guide rods 10 are symmetrically arranged at the top of the side rods 9. The top of the guide rods 10 is rotatably connected to the slide plate 16. Two groups of movable guide grooves 12 corresponding to the top positions of each group of side rods 9 on the top plate 101 are arranged corresponding to the guide rods 10. In this way, the side rods 9 can be moved more stably through the cooperation between the guide rods 10 and the movable guide grooves 12.

[0047] See also Figure 4-8In order to enable a set of double-headed motors 17 to drive both the semi-ring filter screen 5 to move and the blocking body 24 to move up and down, long holes 25 are provided on both sides of the blocking body 24, and a second reciprocating spiral groove 26 is provided in the long hole 25. The driving structure includes a rotating rod 27 rotatably arranged on the leachate filter box 1, the upper end of the rotating rod 27 extends into the driving cavity 11, and the lower end is inserted into the long hole 25. A worm gear 28 is provided at one end of the rotating rod 27 located in the driving cavity 11, and a second guide shaft 29 is provided at one end of the rotating rod 27 located in the long hole 25 to form a sliding connection with the second reciprocating spiral groove 26. A worm 30 meshingly connected to the worm gear 28 is provided on the driving rod 23, and a first ratchet pawl mechanism 33 is provided between the worm 30 and the driving rod 23. The driving rod 23 includes a slotted rod 32 and a smooth rod 31, and the slotted rod 32 is rotatably connected to the smooth rod 31. A second ratchet pawl mechanism 34 (the second ratchet pawl mechanism 34 is provided) is provided between the slotted rod 32 and the smooth rod 31. The first ratchet pawl mechanism 33 and the second ratchet pawl mechanism 34 are arranged in opposite directions, the first reciprocating spiral groove 20 is arranged on the groove rod 32, and the worm 30 is arranged on the light rod 31. When the double-headed motor 17 drives the light rod 31 to rotate forward, through the arrangement of the first ratchet pawl and the second ratchet pawl, the worm 30 will follow the rotation of the light rod 31 and can drive the rotating rod 27 to rotate and drive the blocking body 24 to move up and down, while the groove rod 32 does not rotate. When the double-headed motor 17 drives the light rod 31 to reverse, the worm 30 will not rotate, and the groove rod 32 rotates and drives the long plate 14 to move and drives the semi-ring filter screen 5 to move. In the above, the first ratchet pawl mechanism 33 includes a first pawl arranged on the light rod 31 and a ratchet groove arranged on the worm 30, and the second ratchet pawl mechanism 34 includes a second pawl arranged on the light rod 31 and a second ratchet groove arranged on the groove rod 32.

[0048] See also Figure 3-5 The outlet pipe 3 is located at the lower end of the leachate filter box 1 and is provided with a fixed plate 41, a water cavity 43 is provided in the sealing body 24, a piston plate 42 is provided on the top of the fixed plate 41 and slides up and down with the water cavity 43, a support rod 45 is provided on the top of the fixed plate 41 for fixing the piston plate 42, a water tank 40 is provided on the top of the leachate filter box 1, a hose 35 is connected between the water cavity 43 and the water tank 40, a one-way valve is provided at the connection hose 35 of the sealing body 24, which only allows the water in the water tank 40 to enter the water cavity 43, wherein the hose 35 has a certain amount of expansion and contraction, so that the sealing body 24 will not be interfered when it moves up and down, and when the sealing body 24 moves up in the above manner, water can be pumped out from the water tank 40, and when the sealing body 24 moves down, water can be sprayed out by the flushing nozzle 7 through the piston plate 42, and there is no need to set up a water pump control system separately, wherein a sliding mouth 46 for the sealing body 24 to slide up and down is provided on the bottom plate 102.

[0049] See also Fig. 9A groove 36 is provided on the side of the side rod 9 close to the semi-ring filter screen 5, and side plates 37 are provided at both ends of the semi-ring filter screen 5. The side plates 37 are slidably set in the groove 36. A spring 38 is provided in the groove 36. One end of the spring 38 is fixed to the end surface of the side plate 37 away from the semi-ring filter screen 5. The side rod 9 is connected to the side plate 37 through the spring 38, so that the side rod 9 continuously generates a pre-tightening force on the semi-ring filter screen 5 to prevent the semi-ring filter screen 5 from loosening and affecting the filtering effect (the loosening of the semi-ring filter screen 5 refers to the wrinkling and twisting of the semi-ring filter screen 5 during repeated reverse deformation, and the pulling force of the spring 38 on the side plate 37 should not be too large to prevent the semi-ring filter screen 5 from being over-stretched and increasing the filter hole).

[0050] See also Fig. 9 The side surfaces of the side rods 9 are provided with rubber bodies 39, one end of which is connected to the groove 36. When the two semi-ring filter screens 5 are spliced ​​to form an annular filter screen, the rubber body 39 is deformed and squeezes the side plate 37, restricting the movement of the side plate 37 to prevent the semi-ring filter screen 5 from shaking when the leachate passes through the semi-ring filter screen 5. When the semi-ring filter is flushed on one side of the reverse shaping plate 13, the rubber body 39 can also press the side plate 37 by deformation.

[0051] A method for treating an aged landfill leachate treatment device comprises the following steps:

[0052] Step 1: The aged garbage leachate is homogenized in the regulating tank and then brought to the leachate filter box 1 in the filtration unit to filter and remove large particles of pollutants;

[0053] Step 2: The filtered leachate flows into the UV-ozone reaction tank through the liquid outlet pipe 3, and the UV lamp effectively enhances the ozone oxidation treatment effect, decomposing the difficult-to-degrade macromolecular organic matter into small molecules;

[0054] Step 3: The wastewater treated by the ozone reaction tank enters the denitrification tank, and denitrifying bacteria reduce the nitrogen (N) in nitrate (NO3−) to nitrogen gas (N2) through a series of intermediate products (NO2−, NO, N2O);

[0055] Step 4: The treated wastewater is pumped into the primary DTRO treatment unit through a self-priming pump, and then enters the secondary DTRO treatment unit for reverse osmosis treatment. The effluent meets the discharge standards, and the membrane concentrates of the two stages are returned to the regulating tank through the DTRO membrane concentrate discharge port, mixed with the raw water and then enter the treatment system again;

[0056] Step 5: After treating the leachate for a cycle, clean the annular filter screen, and continue to treat the leachate from the aged garbage.

[0057] See also Figure 1-10The biggest difference between the above steps and the existing old garbage leachate treatment method is that the annular filter screen is cleaned. The specific process of flushing the annular filter screen after reverse deformation is as follows:

[0058] After treating a cycle of leachate, the annular filter screen needs to be cleaned. During cleaning, the double-headed motor 17 is started, and the first bevel gear 21 and the second bevel gear 22 cooperate to drive the light rod 31 to reverse, and the second ratchet pawl mechanism 34 between the light rod 31 and the groove rod 32 can drive the groove rod 32 to rotate. The groove rod 32 rotates and drives the long plate 14 to move toward the side of the shaping plate through the cooperation of the first reciprocating spiral groove 20 and the first guide shaft 19. The long plate 14 moves and drives the side rod 9 to move through the guide rod 10, thereby driving the semi-annular filter screen 5 to move. When the guide rod 10 passes through the inclined groove 121 for the first time, it will drive the slide plates 16 on both sides to slide in the slide grooves 15 of the long plates 14 on both sides toward the side away from each other, so that the semi-annular filter screen 5 is unfolded. When the guide rod 10 moves to the straight groove 122, the semi-annular filter screen 5 forms a plane. When the guide rod 10 continues to move to the inclined groove 121 close to the side of the reverse shaping plate 13, the upper and lower ends of the middle part of the semi-annular filter screen 5 just touch the reverse shaping plate 13. The guide rod 10 continues to move in the inclined groove 121, and the side rods 9 on both sides of the semi-annular filter screen 5 will move toward the side close to each other, and at the same time At the same time, the semi-ring filter screen 5 also gradually forms a semi-ring shape and completes the reverse deformation by abutting against the reverse shaping plate 13. After the side rod 9 moves to fit with the positioning plate 44, the rubber body 39 deforms and presses the side plate 37; then the double-headed motor 17 is driven to reverse, and the first bevel gear 21 and the second bevel gear 22 cooperate to drive the smooth rod 31 to rotate forward. Through the worm 30 and the first ratchet pawl mechanism 33 on the smooth rod 31, the rotation of the smooth rod 31 will drive the worm 30 to rotate. Under the action of the second ratchet pawl mechanism 34, the channel steel will not rotate, and the worm 3 0 drives the worm wheel 28 to rotate, thereby driving the rotating rod 27 to rotate. The second guide shaft 29 and the second reciprocating spiral groove 26 cooperate to drive the blocking body 24 to move downward and expose the flushing nozzle 7 to the position of the semi-ring fracture 6. The downward movement of the blocking body 24 will cause the piston plate 42 to compress the water cavity 43, so that water is sprayed out from the flushing nozzle 7 to clean the semi-ring filter 5. When flushing the semi-ring filter 5, the valve of the channel connecting the liquid outlet pipe 3 and the next leachate treatment process needs to be closed, and the valve of the channel connecting the external treatment cleaning liquid needs to be opened to prevent particulate impurities from entering the next leachate treatment process. When the flushing nozzle 7 finishes flushing the semi-ring filter 5 and moves upward through the blocking body 24, the piston plate 42 moves downward in the water cavity 43 to draw out the water in the water tank 40 through the hose 35, ready for the next cleaning use. After the semi-annular filter screen 5 is flushed, the double-headed motor 17 is driven to rotate forward and the light rod 31 is driven to rotate reversely. At this time, the worm 30 does not rotate but the groove rod 32 rotates. The cooperation between the first reciprocating spiral groove 20 and the first guide shaft 19 will drive the semi-annular filter screen 5 to move toward the side of the liquid inlet pipe 2 until the side rods 9 of the two semi-annular filter screens 5 are attached to each other to form a complete annular filter screen, which can be covered at the annular fracture 4 to filter the leachate.

[0059] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0060] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0061] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for treating aging landfill leachate, characterized in that: The invention comprises a leachate filter box (1), wherein the leachate filter box (1) is provided with a liquid inlet pipe (2) at the upper part and a liquid outlet pipe (3) at the lower part, wherein the liquid outlet pipe (3) is a three-way pipe, wherein the liquid inlet pipe (2) is provided with an annular fracture (4) at the inner cavity of the leachate filter box (1), and the liquid inlet pipe (2) is provided with an annular filter screen at the position of the annular fracture (4), wherein the annular filter screen is composed of two semi-annular filter screens (5) spliced ​​together, and the two semi-annular filter screens (5) are provided with a reverse shaping plate (13) and a washing machine on the side away from each other. The leachate filter box (1) is provided with a moving mechanism for driving two semi-ring filter screens (5) to move toward a side away from or close to each other, the moving mechanism drives the semi-ring filter screens (5) to move and to abut against the reverse shaping plate (13) to cause reverse deformation, a semi-ring fracture (6) is provided in the middle of the reverse shaping plate (13), the flushing mechanism comprises a plugging body (24) for plugging the semi-ring fracture (6) and a flushing nozzle (7) arranged on the plugging body (24), and the leachate filter box (1) is provided with a driving structure for driving the plugging body (24) to move up and down; The semi-annular filter screen (5) is symmetrically provided with side bars (9) on both sides, and the tops of the side bars (9) are provided with guide bars (10). The leachate filter box (1) is composed of a top plate (101), a bottom plate (102), and a peripheral side plate (103) arranged between the top plate (101) and the bottom plate (102). A driving cavity (11) is provided inside the top plate (101), and a movable guide groove (12) is provided at the bottom of the top plate (101) for connecting the inner cavity of the leachate filter box (1) and the driving cavity (11). The side bars (9) are provided with guide bars (10) on the tops of the side bars (9). ) is provided with a guide rod (10) at the top thereof and is slidably connected to the movable guide groove (12); the movable mechanism is arranged in the driving cavity (11) and drives the guide rod (10) to slide along the movable guide groove (12); the movable guide groove (12) is provided in four groups and is symmetrically arranged in pairs, and is used for the guide rods (10) at the top ends of the side rods (9) on both sides of the two semi-annular filter screens (5) to slide; the two semi-annular filter screens (5) move toward a side away from each other through the cooperation of the guide rod (10) and the movable guide groove (12) and abut against the reverse shaping plate (13); The movable guide groove (12) comprises symmetrically arranged inclined grooves (121) and straight grooves (122) connected between two groups of inclined grooves (121). Positioning plates (44) are symmetrically arranged on both sides of the reverse shaping plate (13). The curvature of the reverse shaping plate (13) is the same as that of the liquid inlet pipe (2). The moving mechanism drives the semi-annular filter screens (5) on both sides to move in opposite directions to the end point so that the side rods (9) fit the positioning plates (44). The moving mechanism drives the semi-annular filter screens (5) on both sides that are away from each other to move toward the side that is close to each other so that the side rods (9) on the semi-annular filter screens (5) on both sides fit together. The two groups of straight grooves (122) for sliding the semi-annular filter screen (5) on one side are arranged in parallel, and the distance between the two groups of straight grooves (122) is equal to the width dimension of the semi-annular filter screen (5) when it is fully unfolded.

2. The device for treating aged landfill leachate according to claim 1, characterized in that: The driving chamber (11) is provided with four groups of long plates (14) corresponding to the four groups of side rods (9) on the annular filter screen. The bottom ends of the long plates (14) are provided with slide grooves (15). A slide plate (16) is slidably provided in the slide grooves (15). The top ends of the guide rods (10) are connected to the slide plate (16). The moving mechanism comprises symmetrically arranged driving rods (23) and a double-headed motor (17). The driving rods (23) are rotatably arranged in the driving chamber (11). The long plates (14) are provided with rods for the driving rods (23) to pass through. A hole (18) is provided in the rod hole (18), a first guide shaft (19) is provided in the rod hole (18), first reciprocating spiral grooves (20) for sliding of the first guide shaft (19) are symmetrically provided at both ends of the length direction of the driving rod (23), the driving rod (23) on one side rotates to drive the two groups of long plates (14) to move in a direction of approaching or moving away from each other, first bevel gears (21) are provided on the output ends of both sides of the double-headed motor (17), and second bevel gears (22) meshingly connected with the first bevel gears (21) are provided on the driving rods (23) on both sides.

3. The device for treating aged landfill leachate according to claim 2, characterized in that: Two groups of guide rods (10) are symmetrically arranged at the top ends of the side rods (9); the top ends of the guide rods (10) are rotatably connected to the slide plates (16); and two groups of movable guide grooves (12) corresponding to the top ends of each group of side rods (9) are arranged on the top plate (101) corresponding to the guide rods (10).

4. The device for treating aged landfill leachate according to claim 2, characterized in that: Long holes (25) are provided on both sides of the blocking body (24), and second reciprocating spiral grooves (26) are provided in the long holes (25). The driving structure comprises a rotating rod (27) rotatably arranged on the leachate filter box (1), the upper end of the rotating rod (27) extending into the driving cavity (11) and the lower end inserted into the long hole (25), a worm gear (28) is provided at one end of the rotating rod (27) located in the driving cavity (11), and a second guide shaft (29) is provided at one end of the rotating rod (27) located in the long hole (25) to form a sliding connection with the second reciprocating spiral groove (26), and a worm gear (28) is provided on the driving rod (23). A worm (30) meshingly connected to a wheel (28), a first ratchet and pawl mechanism (33) being provided between the worm (30) and the driving rod (23), the driving rod (23) comprising a slotted rod (32) and a smooth rod (31), the slotted rod (32) being rotatably connected to the smooth rod (31), a second ratchet and pawl mechanism (34) being provided between the slotted rod (32) and the smooth rod (31), the first ratchet and pawl mechanism (33) and the second ratchet and pawl mechanism (34) being arranged in opposite directions, the first reciprocating spiral groove (20) being arranged on the slotted rod (32), and the worm (30) being arranged on the smooth rod (31).

5. The device for treating aged landfill leachate according to claim 1, characterized in that: The liquid outlet pipe (3) is provided with a fixed plate (41) at the lower end of the leachate filter box (1), a water cavity (43) is provided in the blocking body (24), a piston plate (42) is provided on the top of the fixed plate (41) and is slidable up and down with the water cavity (43), a water tank (40) is provided on the top of the leachate filter box (1), a hose (35) is connected between the water cavity (43) and the water tank (40), and a one-way valve is provided at the connection point of the blocking body (24) to the hose (35) so as to allow only water in the water tank (40) to enter the water cavity (43).

6. The device for treating aged landfill leachate according to claim 1, characterized in that: A groove (36) is provided on a side of the side rod (9) close to the semi-annular filter (5), and side plates (37) are provided at both ends of the semi-annular filter (5). The side plates (37) are slidably arranged in the groove (36), and a spring (38) is provided in the groove (36). One end of the spring (38) is fixed to an end surface of the side plate (37) away from the semi-annular filter (5).

7. The device for treating aged landfill leachate according to claim 6, characterized in that: Rubber bodies (39) are provided on both side end surfaces of the side rod (9).

8. A method for treating aged landfill leachate using the device for treating aged landfill leachate according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: The aged garbage leachate is homogenized in a regulating tank and then transferred to a leachate filter box (1) to filter and remove large particles of pollutants; Step 2: The filtered leachate flows into the UV-ozone reaction tank through the liquid outlet pipe (3), and passes through the UV lamp to effectively enhance the ozone oxidation treatment effect, so that the macromolecular organic matter that is difficult to degrade is decomposed into small molecules; Step 3: The wastewater treated by the ozone reaction tank enters the denitrification tank, and the denitrifying bacteria reduce the nitrogen in the nitrate to nitrogen gas through a series of intermediate products; Step 4: The treated wastewater is pumped into the primary DTRO treatment unit through a self-priming pump, and then enters the secondary DTRO treatment unit for reverse osmosis treatment. The effluent meets the discharge standards, and the membrane concentrates of the two stages are returned to the regulating tank through the DTRO membrane concentrate discharge port, mixed with the raw water and then enter the treatment system again; Step 5: After treating the leachate for a cycle, clean the annular filter screen, and continue to treat the leachate from the aged garbage.

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