A pretreatment device for biochemical treatment of landfill leachate

Abstract

The present invention relates to the technical field of sewage treatment, and in particular to a pretreatment device for biochemical treatment of landfill leachate, comprising a bottom cylinder, a lifting cover movably arranged above the bottom cylinder, a support plate fixedly arranged on the outer wall of the bottom cylinder, and a telescopic cylinder fixedly arranged on the upper surface of the support plate, a fixed plate fixedly arranged on the outer wall of the lifting cover, and the telescopic end of the telescopic cylinder is fixedly connected to the lower surface of the fixed plate, and a support seat is fixedly arranged on the bottom inner wall of the bottom cylinder. The present invention can effectively filter out large particles of solid, suspended matter, and some organic matter and heavy metals in the leachate, and can also realize automatic cleaning of impurities, so that the filter bag can be continuously recycled, ensuring that the leachate can be treated uninterruptedly, effectively improving the treatment efficiency, and can also directly lift the lifting cover through the telescopic cylinder, which is convenient for replacing and cleaning the filter bag, and also convenient for overhauling and maintaining the equipment, and the use effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a pretreatment device for landfill leachate before biochemical treatment. Background Art

[0002] With the acceleration of urbanization, the amount of garbage generated is increasing day by day. As the main treatment facilities, landfills and incineration plants continue to produce leachate with complex components and strong pollution during operation. Traditional leachate treatment methods face many difficulties and are difficult to meet the current strict environmental protection standards and resource recovery needs. The treatment steps of leachate mainly include pretreatment process, biochemical treatment process and deep treatment process. The main purpose of the pretreatment process is to effectively filter out large particles of solids, suspended matter and some organic matter and heavy metals in the leachate. The main purpose of the biochemical treatment process is to transform organic matter and ammonia nitrogen into harmless substances through microbial action. The main purpose of the deep treatment process is to remove trace organic matter, heavy metals and nutrients. Among them, the pretreatment link before biological treatment is very important, because if the impurities such as suspended solids, colloidal substances, high-concentration organic matter and some heavy metal particles contained in the leachate are directly entered into the subsequent biochemical treatment, membrane separation and other core process links without effective pretreatment, it will cause many thorny problems.

[0003] At present, the main method for pre-treatment of landfill leachate before biological treatment is to filter it through traditional screens, which can only intercept large-sized floating objects and blocky debris, and the mechanical screen needs to be cleaned frequently. During the cleaning process, filtering treatment can no longer be performed, which greatly affects the treatment efficiency. Therefore, it is urgent to design a pre-treatment device for landfill leachate before biochemical treatment to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the defects in the prior art and to propose a pretreatment device for landfill leachate before biochemical treatment.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A pretreatment device for biochemical treatment of landfill leachate, comprising a bottom cylinder, a lifting cover movably arranged above the bottom cylinder, a support plate fixedly arranged on the outer wall of the bottom cylinder, and a telescopic cylinder fixedly arranged on the upper surface of the support plate, a fixed plate fixedly arranged on the outer wall of the lifting cover, and the telescopic end of the telescopic cylinder is fixedly connected to the lower surface of the fixed plate, a support seat fixedly arranged on the bottom inner wall of the bottom cylinder, and a rotating shaft rotatably connected to the upper surface of the support seat, a rotating disk fixedly arranged on the outer wall of the rotating shaft, and the outer wall of the rotating disk is provided with liquid guide ports distributed in an annular manner with equal distances, an upper clamping ring is placed in the liquid guide port, and a filter bag is fixedly arranged on the lower surface of the upper clamping ring, and upper clamping blocks distributed in an annular manner with equal distances are fixedly arranged on the outer wall of the upper clamping ring, a positioning groove is arranged on the inner wall of the liquid guide port, and the upper clamping block and The positioning grooves cooperate with each other, the upper surface of the turntable is also fixedly provided with a fence, and the fence and the rotating shaft are fixedly provided with dividing strips that are equidistantly distributed in an annular manner, and the dividing strips and the liquid guide ports are staggered, the outer wall of the rotating shaft is also fixedly provided with a disc, and an outer cylinder that is equidistantly distributed in an annular manner and corresponds to the liquid guide port is provided above the disc, a support frame is fixedly provided on the outer wall of the outer cylinder, and the bottom end of the support frame is connected to the upper surface of the disc, an inner cylinder is sleeved in the outer cylinder, an annular groove is provided on the inner wall of the outer cylinder, a limiting ring is fixedly provided on the outer wall of the inner cylinder, and the limiting ring is rotatably provided in the annular groove, a partition is fixedly provided between the bottom cylinder and the support seat, a liquid discharge pipe is provided on one side outer wall of the bottom cylinder, and a waste discharge port is provided on the other side outer wall of the bottom cylinder, and also includes:

[0007] A driving assembly, the driving assembly is arranged in the lifting cover and is used to drive the rotating shaft to rotate;

[0008] A rotating assembly, which is arranged below the turntable and is used to drive the inner cylinder to rotate in the outer cylinder;

[0009] A twisting assembly, which is arranged in the inner cylinder and is used to twist the filter bag when the inner cylinder rotates;

[0010] The lower row component is arranged in the disc and is used to collect the filter residue discharged from the filter bag and guide it to the side of the partition plate toward the waste outlet.

[0011] As a further solution of the present invention: the rotating assembly includes a stepper motor fixedly arranged on the upper surface of the turntable, the driving end of the stepper motor is rotatably connected to a rotating rod, and a gear is fixedly arranged on the end of the rotating rod, the outer wall of the inner cylinder is provided with a tooth groove, and the gear and the tooth groove are meshed, the outer wall of the outer cylinder is also fixedly provided with a limit block, and the rotating rod passes through the limit block.

[0012] As a further scheme of the present invention: the torsion assembly includes a ring plate movably arranged in the inner cylinder, the inner wall of the inner cylinder is fixedly provided with an upper side plate and a lower side plate which are equidistantly distributed in a ring shape, and a vertical rod is fixedly provided between the upper side plate and the lower side plate, the vertical rod penetrates the ring plate, and a spring is sleeved on the outer side of the vertical rod, one end of the spring is connected to the lower surface of the ring plate, and the other end of the spring is connected to the upper surface of the lower side plate, the bottom end of the filter bag is fixedly connected with a lower clamping ring, and the lower clamping ring is located in the ring plate, the upper surface of the ring plate is provided with through openings which are equidistantly distributed in a ring shape, the lower surface of the ring plate is provided with clamping grooves which are equidistantly distributed in a ring shape, and the clamping grooves and the through openings are staggered, and the outer side of the lower clamping ring is fixedly provided with lower clamping blocks which are equidistantly distributed in a ring shape, and the lower clamping blocks are located in the clamping grooves.

[0013] As a further solution of the present invention: a splash plate is fixedly provided on the outer wall of the enclosure to shield the stepper motor located on the turntable.

[0014] As a further solution of the present invention: the driving assembly includes a servo motor fixedly arranged on the upper surface of the lifting cover, and the driving end of the servo motor is rotatably connected to a block, the top end of the rotating shaft is provided with a square groove, and the block is inserted into the square groove.

[0015] As a further solution of the present invention: a sealing gasket is fixedly provided on the top of the bottom tube, and the sealing gasket is located between the top of the bottom tube and the bottom of the lifting cover.

[0016] As a further solution of the present invention: the lower discharge component includes lower discharge ports which are equidistantly opened in a ring shape on the outer wall of the disc, and the lower discharge ports correspond to the filter bag. A collecting bucket is threadedly connected to the lower discharge port, and a lower discharge cylinder corresponding to the collecting bucket is fixedly provided on the lower surface of the disc.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a pretreatment device for landfill leachate before biochemical treatment. Before purifying the landfill leachate, the driving assembly can be used to drive the rotating shaft to rotate, so that the liquid guide bucket is aligned with the liquid guide port on the turntable, and the rotating assembly can be used to drive the corresponding inner cylinder below the liquid guide port to rotate in the outer cylinder. When the inner cylinder rotates, the middle position of the filter bag can be twisted with the help of the twisting assembly, which plays a role in closing the middle section of the filter bag. In this way, when the landfill leachate to be purified is guided to the liquid guide port through the liquid guide bucket and falls into the filter bag, the leachate can be The impurities in the filter bag are retained in the filter bag, and the leachate after the impurities are filtered out will pass through the filter bag and be discharged from the bottom. With the help of the bottom discharge component, the leachate is guided to the side of the partition close to the drain pipe and discharged through the drain pipe, which effectively realizes the pretreatment of the leachate, effectively filters out large particles of solids, suspended matter, and some organic matter and heavy metals in the leachate, which is more conducive to the subsequent biochemical treatment of the leachate. In the process of treatment, when more impurities accumulate above the torsion of the filter bag, the drive component can be used to drive the shaft to rotate, so that the turntable rotates together. The new group of twisted filter bags are moved to the bottom of the liquid guide bucket to collect impurities in the leachate, and during the rotation of the turntable, under the blocking effect of the enclosure and the dividing strips, part of the leachate that falls on the surface of the turntable will eventually flow to the liquid guide port, effectively preventing the leachate from overflowing. When the filter bag with impurities collected rotates to the side of the partition facing the waste outlet, the inner cylinder in the outer cylinder can be driven to rotate in the opposite direction by the rotating component, and the twisted filter bag can be reset under the action of the twisting component, so that the middle position of the filter bag remains unobstructed again. At this time, the impurities collected in the filter bag will fall directly and be guided to the side of the partition in the bottom cylinder toward the waste outlet with the help of the lower row component, and finally discharged through the waste outlet, effectively realizing the automatic cleaning of impurities, so that the filter bag can be continuously recycled, ensuring that the leachate can be treated uninterruptedly, effectively improving the treatment efficiency, and further, when the penetration effect of the filter bag decreases, the lifting cover can be directly raised by the telescopic cylinder, which is convenient for replacing and cleaning the filter bag, and also convenient for overhauling and maintaining the equipment, with better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram from a first perspective of a pretreatment device for biochemical treatment of landfill leachate provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of a half-section structure of a pretreatment device for biochemical treatment of landfill leachate provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the structure inside a lifting cover in a pretreatment device for biochemical treatment of landfill leachate provided by an embodiment of the present invention;

[0022] Figure 4A schematic diagram of a half-section structure of the interior of a lifting cover in a pretreatment device for biochemical treatment of landfill leachate provided by an embodiment of the present invention;

[0023] Figure 5 for Figure 4 A is an enlarged structural diagram;

[0024] Figure 6 A schematic diagram of the structure of a filter bag in a pretreatment device for biochemical treatment of landfill leachate provided by an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of the structure of a rotating disk in a pretreatment device for biochemical treatment of landfill leachate provided by an embodiment of the present invention;

[0026] Figure 8 A schematic structural diagram of a ring plate in a pretreatment device for biochemical treatment of landfill leachate provided by an embodiment of the present invention from a first perspective;

[0027] Fig. 9 A schematic structural diagram of a ring plate in a pretreatment device for biochemical treatment of landfill leachate provided by an embodiment of the present invention from a second perspective;

[0028] Fig.10 A schematic structural diagram from a second perspective of a pretreatment device for biochemical treatment of landfill leachate provided by an embodiment of the present invention;

[0029] Fig.11 A schematic structural diagram of a partition in a pretreatment device for biochemical treatment of landfill leachate provided in an embodiment of the present invention.

[0030] In the figure: 101-bottom cylinder, 102-lifting cover, 103-support plate, 104-telescopic cylinder, 105-fixed plate, 107-liquid guide bucket, 108-waste outlet, 109-liquid discharge pipe, 110-support seat, 111-rotating shaft, 112-disc, 113-rotating disk, 114-liquid guide port, 115-positioning groove, 116-enclosure, 117-dividing bar, 118-filter bag, 119-support frame, 120-outer cylinder, 121-inner cylinder, 122-limiting ring, 123-upper clamp ring, 124-upper clamp block , 125- partition, 126- sealing gasket, 201- stepper motor, 202- rotating rod, 203- gear, 204- limit block, 205- tooth groove, 206- splash plate, 301- upper side plate, 302- vertical rod, 303- lower side plate, 304- spring, 305- ring plate, 306- lower retaining ring, 307- through port, 308- slot, 309- lower block, 401- servo motor, 402- block, 403- square slot, 501- lower discharge port, 502- collection bucket, 503- lower discharge tube. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] like Figure 1-Figure 11 As shown, a pretreatment device for biochemical treatment of landfill leachate provided by an embodiment of the present invention comprises a bottom cylinder 101, a lifting cover 102 is movably provided above the bottom cylinder 101, a supporting plate 103 is fixedly provided on the outer wall of the bottom cylinder 101, and a telescopic cylinder 104 is fixedly provided on the upper surface of the supporting plate 103, a fixing plate 105 is fixedly provided on the outer wall of the lifting cover 102, and the telescopic end of the telescopic cylinder 104 is fixedly connected to the lower surface of the fixing plate 105, a supporting seat 110 is fixedly provided on the inner wall of the bottom of the bottom cylinder 101, and a rotating shaft 111 is rotatably connected to the upper surface of the supporting seat 110, and the outer wall of the rotating shaft 111 is fixedly provided with a supporting plate 103, and a telescopic cylinder 104 is fixedly provided on the upper surface of the supporting plate 103, and a telescopic cylinder 104 is fixedly provided on the outer wall of the lifting cover 102, and a telescopic end of the telescopic cylinder 104 is fixedly connected to the lower surface of the fixing plate 105, and a supporting seat 110 is fixedly provided on the inner wall of the bottom of the bottom cylinder 101, and a rotating shaft 111 is rotatably connected to the upper surface of the supporting seat 110, and a rotating shaft 111 is fixedly provided on the outer wall of the rotating shaft 111. A turntable 113 is arranged, and the outer wall of the turntable 113 is provided with liquid guide ports 114 which are equidistantly distributed in an annular manner, an upper clamping ring 123 is placed in the liquid guide port 114, and a filter bag 118 is fixedly arranged on the lower surface of the upper clamping ring 123, an upper clamping block 124 which is equidistantly distributed in an annular manner is fixedly arranged on the outer wall of the upper clamping ring 123, a positioning groove 115 is arranged on the inner wall of the liquid guide port 114, and the upper clamping block 124 and the positioning groove 115 are matched, a fence 116 is also fixedly arranged on the upper surface of the turntable 113, and a dividing strip 117 which is equidistantly distributed in an annular manner is fixedly arranged between the fence 116 and the rotating shaft 111, and the dividing strip 117 and The liquid guide ports 114 are staggered, and a disc 112 is fixedly arranged on the outer wall of the rotating shaft 111. An outer cylinder 120 is arranged above the disc 112 and is distributed in an annular manner at equal distances and corresponds to the liquid guide ports 114. A support frame 119 is fixedly arranged on the outer wall of the outer cylinder 120, and the bottom end of the support frame 119 is connected to the upper surface of the disc 112. An inner cylinder 121 is sleeved in the outer cylinder 120, and an annular groove is opened on the inner wall of the outer cylinder 120. A limit ring 122 is fixedly arranged on the outer wall of the inner cylinder 121, and the limit ring 122 is rotatably arranged in the annular groove. A partition 125 is fixedly arranged between the bottom cylinder 101 and the support seat 110, and the bottom cylinder 101 is fixedly arranged with a spacer 125. 1 is connected to an outer wall of one side of the bottom cylinder 101 and a drain pipe 109 is provided, and a waste outlet 108 is opened on the outer wall of the other side of the bottom cylinder 101, and further comprises: a driving assembly, which is arranged in the lifting cover 102 and is used to drive the rotating shaft 111 to rotate; a rotating assembly, which is arranged below the rotating disk 113 and is used to drive the inner cylinder 121 to rotate in the outer cylinder 120; a twisting assembly, which is arranged in the inner cylinder 121 and is used to twist the filter bag 118 when the inner cylinder 121 rotates; and a lower row assembly, which is arranged in the disc 112 and is used to collect the filter residue discharged from the filter bag 118 and guide the baffle 125 toward one side of the waste outlet 108.

[0033] Before purifying the landfill leachate, the driving assembly can be used to drive the rotating shaft 111 to rotate, so that the liquid guide bucket 107 is aligned with the liquid guide port 114 on the turntable 113, and at the same time, the inner cylinder 121 corresponding to the lower portion of the liquid guide port 114 is driven to rotate in the outer cylinder 120 by the rotating assembly. When the inner cylinder 121 rotates, the middle portion of the filter bag 118 can be twisted with the help of the twisting assembly, so as to seal the middle portion of the filter bag 118. In this way, when the landfill leachate to be purified is guided to the liquid guide port 114 through the liquid guide bucket 107 and falls into the filter bag 118, the impurities in the leachate can be retained in the filter bag 118. The leachate after impurities are filtered out will pass through the filter bag 118 and be discharged downward, and the leachate will be guided to the side of the partition 125 close to the drain pipe 109 by the lower discharge component, and discharged through the drain pipe 109, thereby effectively realizing the pretreatment of the leachate, effectively filtering out large particles of solids, suspended matter, and some organic matter and heavy metals and other impurities in the leachate, which is more conducive to the subsequent biochemical treatment of the leachate. In addition, during the treatment process, when more impurities accumulate above the twisted part of the filter bag 118, the drive component can be used to drive the shaft 111 to rotate, so that the turntable 113 rotates together, so that a new set of twisted filter bags 118 move The impurities in the leachate are collected below the liquid guide bucket 107, and during the rotation of the turntable 113, under the blocking effect of the enclosure 116 and the partition bar 117, part of the leachate falling on the surface of the turntable 113 will eventually flow to the liquid guide port 114, effectively preventing the leachate from overflowing. When the filter bag 118 with impurities collected rotates to the side of the partition 125 facing the waste outlet 108, the inner cylinder 121 in the outer cylinder 120 can be driven to rotate in the opposite direction through the rotating component, and the twisted filter bag 118 can be reset under the action of the twisting component, so that the middle position of the filter bag 118 remains unobstructed again. At this time, the impurities collected in the filter bag 118 will fall directly and be guided to the side of the partition 125 in the bottom cylinder 101 toward the waste outlet 108 with the help of the lower row component, and finally be discharged through the waste outlet 108, effectively realizing the automatic cleaning of impurities, so that the filter bag 118 can be continuously recycled, ensuring that the leachate can be treated uninterruptedly, effectively improving the treatment efficiency, further, when the penetration effect of the filter bag 118 decreases, the lifting cover 102 can be directly raised by the telescopic cylinder 104, which is convenient for replacing and cleaning the filter bag 118, and also convenient for the inspection and maintenance of the equipment, and the use effect is better.

[0034] As an embodiment of the present invention, please refer to Figure 4 and Figure 5The rotating assembly includes a stepper motor 201 fixedly arranged on the upper surface of the turntable 113, the driving end of the stepper motor 201 is rotatably connected to a rotating rod 202, and a gear 203 is fixedly arranged at the end of the rotating rod 202, a tooth groove 205 is provided on the outer wall of the inner cylinder 121, and the gear 203 is meshed with the tooth groove 205, and a limit block 204 is fixedly arranged on the outer wall of the outer cylinder 120, and the rotating rod 202 passes through the limit block 204. Under the limiting action of the limit block 204, the rotation process of the rotating rod 202 can be made more stable. When it is necessary to drive the inner cylinder 121 to rotate in the outer cylinder 120, the stepper motor 201 can be used to drive the rotating rod 202 to rotate, and the rotating rod 202 drives the gear 203 to rotate. Since the gear 203 is meshed with the tooth groove 205, the gear 203 can drive the inner cylinder 121 to rotate in the outer cylinder 120, which is very convenient to use.

[0035] As an embodiment of the present invention, please refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9The torsion assembly includes a ring plate 305 movably arranged in the inner cylinder 121, and the inner wall of the inner cylinder 121 is fixedly provided with an upper side plate 301 and a lower side plate 303 which are equidistantly distributed in a ring shape, and a vertical rod 302 is fixedly arranged between the upper side plate 301 and the lower side plate 303, and the vertical rod 302 penetrates the ring plate 305, and a spring 304 is sleeved on the outer side of the vertical rod 302, one end of the spring 304 is connected to the lower surface of the ring plate 305, and the other end of the spring 304 is connected to the upper surface of the lower side plate 303, and the bottom end of the filter bag 118 is fixedly connected with a lower snap ring 306, and the lower snap ring 306 is located in the ring plate 305, The upper surface of the ring plate 305 is provided with through openings 307 which are distributed in an annular shape at equal distances, and the lower surface of the ring plate 305 is provided with grooves 308 which are distributed in an annular shape at equal distances, and the grooves 308 and the through openings 307 are arranged alternately, and the outer side of the lower snap ring 306 is fixedly provided with lower snap blocks 309 which are distributed in an annular shape at equal distances, and the lower snap blocks 309 are located in the grooves 308. When the inner cylinder 121 rotates in the outer cylinder 120, the ring plate 305 will rotate together with the inner cylinder 121, and because the lower snap blocks 309 are engaged in the grooves 308, the lower snap ring 306 in the ring plate 305 will also rotate together with the ring plate 305, and the upper snap ring 1 Since the upper clamping block 124 cannot rotate due to the limiting effect, when the lower clamping ring 306 below rotates, the filter bag 118 between the upper clamping ring 123 and the lower clamping ring 306 will be twisted, and the filter bag 118 will also generate an upward pulling force on the lower clamping ring 306 during the twisting process, so that the lower clamping ring 306 moves downward outside the vertical rod 302 and the spring 304 is stretched. In this way, when the inner cylinder 121 rotates in the opposite direction later, the filter bag 118 can be automatically reset and the twist is released under the pulling force of the spring 304. Furthermore, the size of the lower clamping ring 306 is smaller than that of the upper clamping ring 123. When it is needed later When replacing and cleaning the filter bag 118, the twisting of the filter bag 118 can be released first, and then the ring plate 305 can be lifted up. At this time, the lower snap ring 306 will fall from the ring plate 305, and then the lower snap ring 306 can be rotated so that the lower clamping block 309 on the outer side of the lower snap ring 306 is aligned with the through opening 307, and the filter bag 118 is pulled upward. At this time, the lower snap ring 306 can be directly taken out from the ring plate 305, and then the upper snap ring 123, the filter bag 118 and the lower snap ring 306 are successively pulled out upward through the liquid guide port 114, and the filter bag 118 can be removed and directly cleaned or replaced, which is very convenient to use.

[0036] As an embodiment of the present invention, please refer to Figure 4 and Fig.11A splash plate 206 is also fixedly provided on the outer wall of the enclosure 116, which is used to shield the stepper motor 201 located on the turntable 113 to prevent the leachate from splashing onto the surface of the stepper motor 201 and causing corrosion. In this embodiment, preferably, the splash plate 206 can also be tilted toward the enclosure 116, so that the leachate splashed onto the surface of the splash plate 206 can flow back into the enclosure 116, resulting in a better use effect.

[0037] As an embodiment of the present invention, please refer to Figure 2 and Figure 3 The driving component includes a servo motor 401 fixedly arranged on the upper surface of the lifting cover 102, and the driving end of the servo motor 401 is rotatably connected to a block 402. A square groove 403 is provided at the top of the rotating shaft 111, and the block 402 is inserted into the square groove 403. When the lifting cover 102 moves downward and closes with the bottom cylinder 101, the block 402 can be aligned with the square groove 403 at the top of the rotating shaft 111, and then the servo motor 401 drives the block 402 to rotate, so that the rotating shaft 111 can be rotated together, which is very convenient to use.

[0038] As an embodiment of the present invention, please refer to Figure 2 and Figure 3 A sealing gasket 126 is also fixedly provided at the top of the bottom tube 101, and the sealing gasket 126 is between the top of the bottom tube 101 and the bottom of the lifting cover 102, which can enhance the sealing performance after the bottom tube 101 and the lifting cover 102 are closed, and the use effect is better.

[0039] As an embodiment of the present invention, please refer to Figure 4 and Fig.11 The lower discharge component includes a lower discharge port 501 which is equidistantly opened in a ring shape on the outer wall of the disc 112, and the lower discharge port 501 corresponds to the filter bag 118. A collecting bucket 502 is threadedly connected to the lower discharge port 501. A lower discharge cylinder 503 corresponding to the collecting bucket 502 is also fixedly provided on the lower surface of the disc 112. The leachate and impurities discharged downward from the inner cylinder 121 can be collected by the collecting bucket 502, and then guided downward along the lower discharge port 501 to the lower discharge cylinder 503, and then discharged to the bottom cylinder 101 through the lower discharge cylinder 503. The collecting bucket 502 can be directly rotated and removed to avoid obstruction to the loading and unloading of the filter bag 118, and the use effect is better.

[0040] When in use, before purifying the landfill leachate, the driving assembly can be used to drive the rotating shaft 111 to rotate, so that the liquid guide bucket 107 is aligned with the liquid guide port 114 on the turntable 113, and at the same time, the inner cylinder 121 corresponding to the lower portion of the liquid guide port 114 is driven to rotate in the outer cylinder 120 by the rotating assembly. When the inner cylinder 121 rotates, the middle portion of the filter bag 118 can be twisted with the aid of the twisting assembly, thereby sealing the middle portion of the filter bag 118. In this way, when the landfill leachate to be purified is guided to the liquid guide port 114 through the liquid guide bucket 107 and falls into the filter bag 118, the impurities in the leachate can be retained in the filter bag. 118, and the leachate after impurities are filtered out will pass through the filter bag 118 and be discharged downward, and with the help of the lower discharge component, the leachate is guided to the side of the partition 125 close to the drain pipe 109, and discharged through the drain pipe 109, effectively realizing the pretreatment of the leachate, and effectively filtering out large particles of solids, suspended matter, and some organic matter and heavy metals and other impurities in the leachate, which is more conducive to the subsequent biochemical treatment of the leachate. In addition, during the treatment process, when more impurities accumulate above the twisted part of the filter bag 118, the drive component can be used to drive the shaft 111 to rotate, so that the turntable 113 rotates together, so that a new group of twisted filter bags 118 can be The filter bag 118 is moved to the bottom of the liquid guide bucket 107 to collect impurities in the leachate, and during the rotation of the turntable 113, under the blocking effect of the enclosure 116 and the partition bar 117, part of the leachate falling on the surface of the turntable 113 will eventually flow to the liquid guide port 114, effectively preventing the leachate from overflowing. When the filter bag 118 with impurities collected rotates to the side of the partition 125 facing the waste outlet 108, the inner cylinder 121 in the outer cylinder 120 can be driven to rotate in the opposite direction through the rotating component, and the twisted filter bag 118 can be reset under the action of the twisting component, so that the middle position of the filter bag 118 can be kept unobstructed again. At this time, the impurities collected in the filter bag 118 will fall directly and be guided to the side of the partition 125 in the bottom cylinder 101 toward the waste outlet 108 with the help of the lower row component, and finally be discharged through the waste outlet 108, thereby effectively realizing the automatic cleaning of impurities and allowing the filter bag 118 to be continuously recycled, thereby ensuring that the leachate can be treated uninterruptedly, thereby effectively improving the treatment efficiency. Furthermore, when the penetration effect of the filter bag 118 decreases, the lifting cover 102 can be directly raised by the telescopic cylinder 104, thereby facilitating the replacement and cleaning of the filter bag 118, and also facilitating the inspection and maintenance of the equipment, thereby achieving a better use effect.

[0041] It should be particularly noted that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A pretreatment device for biochemical treatment of landfill leachate, comprising a bottom cylinder, characterized in that: A lifting cover is movably provided above the bottom cylinder, a supporting plate is fixedly provided on the outer wall of the bottom cylinder, and a telescopic cylinder is fixedly provided on the upper surface of the supporting plate, a fixing plate is fixedly provided on the outer wall of the lifting cover, and the telescopic end of the telescopic cylinder is fixedly connected to the lower surface of the fixing plate, a supporting seat is fixedly provided on the bottom inner wall of the bottom cylinder, and a rotating shaft is rotatably connected to the upper surface of the supporting seat, a rotating disk is fixedly provided on the outer wall of the rotating shaft, and the outer wall of the rotating disk is provided with liquid guide ports which are equidistantly distributed in an annular manner, an upper clamping ring is placed in the liquid guide port, and a filter bag is fixedly provided on the lower surface of the upper clamping ring, and upper clamping blocks which are equidistantly distributed in an annular manner are fixedly provided on the outer wall of the upper clamping ring, a positioning groove is provided on the inner wall of the liquid guide port, and the upper clamping block and the positioning groove cooperate with each other, The upper surface of the rotating disk is also fixedly provided with a fence, and dividing strips are fixedly provided between the fence and the rotating shaft and are distributed in an annular manner with equal distances, and the dividing strips and the liquid guide ports are staggered. A circular disc is also fixedly provided on the outer wall of the rotating shaft, and an outer cylinder is arranged above the circular disc and is distributed in an annular manner with equal distances and corresponds to the liquid guide port. A support frame is fixedly provided on the outer wall of the outer cylinder, and the bottom end of the support frame is connected to the upper surface of the circular disc. An inner cylinder is sleeved in the outer cylinder, and an annular groove is provided on the inner wall of the outer cylinder. A limiting ring is fixedly provided on the outer wall of the inner cylinder, and the limiting ring is rotatably provided in the annular groove. A partition is fixedly provided between the bottom cylinder and the support seat, and a liquid discharge pipe is provided on the outer wall of one side of the bottom cylinder, and a waste discharge port is provided on the outer wall of the other side of the bottom cylinder, and it also includes: A driving assembly, the driving assembly is arranged in the lifting cover and is used to drive the rotating shaft to rotate; A rotating assembly, which is arranged below the turntable and is used to drive the inner cylinder to rotate in the outer cylinder. The rotating assembly includes a stepper motor fixedly arranged on the upper surface of the turntable, a driving end of the stepper motor is rotatably connected to a rotating rod, and a gear is fixedly arranged at the end of the rotating rod, a tooth groove is provided on the outer wall of the inner cylinder, and the gear and the tooth groove are meshed, a limit block is also fixedly arranged on the outer wall of the outer cylinder, and the rotating rod passes through the limit block; The filter bag of claim 1, wherein the filter bag has a plurality of filter elements, each of which is adapted to move along the filter screen. The filter bag has a plurality of filter elements, each of which is adapted to move along the filter screen. The plurality of filter elements are adapted to move along the filter screen. The plurality of filter elements are adapted to move along the filter screen. The lower row component is arranged in the disc and is used to collect the filter residue discharged from the filter bag and guide it to the side of the partition plate toward the waste outlet.

2. A pretreatment device for landfill leachate biochemical treatment according to claim 1, characterized in that: A splash plate is also fixedly provided on the outer wall of the enclosure to shield the stepper motor located on the turntable.

3. A pretreatment device for landfill leachate biochemical treatment according to claim 2, characterized in that: The driving assembly comprises a servo motor fixedly arranged on the upper surface of the lifting cover, and a driving end of the servo motor is rotatably connected with a block, a top end of the rotating shaft is provided with a square groove, and the block is inserted into the square groove.

4. The pretreatment device for landfill leachate biochemical treatment according to claim 1, characterized in that: A sealing gasket is also fixedly arranged on the top of the bottom tube, and the sealing gasket is located between the top of the bottom tube and the bottom of the lifting cover.

5. The pretreatment device for landfill leachate biochemical treatment according to claim 1, characterized in that: The lower discharge assembly includes lower discharge ports which are equidistantly annularly opened on the outer wall of the disc, and the lower discharge ports correspond to the filter bag. A collecting bucket is threadedly connected to the lower discharge port, and a lower discharge cylinder corresponding to the collecting bucket is fixedly arranged on the lower surface of the disc.

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