Landfill leachate preprocessor

Abstract

The utility model relates to the technical field of landfill leachate pretreatment, in particular to a landfill leachate pretreater which comprises a filter pressing tank arranged behind a pretreatment tank, and a filter pressing mechanism for performing solid-liquid separation on landfill leachate is arranged in the filter pressing tank. A treatment mechanism for pretreating the filtered landfill leachate is arranged in the pretreatment tank. According to the utility model, the rotating shaft is driven by the driving motor to rotate, so that the filter pressing packing auger is driven to rotate to convey solid impurities in a mixture to the left end of the filter pressing tank, and landfill leachate in sludge is discharged through the filtrate holes in the filter pressing packing auger in the process of conveying and extruding, so that solid-liquid separation of the landfill leachate is realized; landfill leachate is pumped into the filter box through the suction pump, impurities in the flowing-through landfill leachate are filtered step by step in a multi-layer mode through the multiple sets of inverted-V-shaped filter screens installed in the filter box, and therefore solid impurities in the landfill leachate are intercepted.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage leachate pretreatment technical field especially relates to a kind of garbage leachate pretreatment device. BACKGROUND

[0002] Garbage leachate is a kind of liquid with complex composition, high pollutant concentration and high toxicity produced in the process of garbage stacking, landfill or treatment due to precipitation penetration, garbage decomposition and other factors, and untreated or improperly treated garbage leachate can cause serious pollution to soil, groundwater and surface water, and further threaten the ecological environment and human health.

[0003] But because garbage leachate often mixed with large particle suspended solids and solid impurities such as soil, branches, etc., the above impurities need to be filtered out before treating garbage leachate, but the traditional filtering method often only uses filter screen to intercept and filter impurities, and there is still a lot of garbage leachate in the suspended solids and sludge filtered out, which needs to be treated additionally, increasing the processing steps and processing cost. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a kind of garbage leachate pretreatment device, solve the technical problem that the suspended solids and sludge filtered out in the prior art still exist a lot of garbage leachate inside, reach the purpose that garbage leachate is completely collected and pretreated.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a kind of garbage leachate pretreatment device, including the filter press tank installed in the rear of pretreatment tank, the filter press mechanism for solid-liquid separation of garbage leachate is provided in the filter press tank, the treatment mechanism for the pretreatment of garbage leachate filtered is provided in the pretreatment tank.

[0006] The filter press mechanism includes rotating shaft rotatably connected in the rotating hole of pretreatment tank, and the rotating shaft is provided with filter press auger, the filter press auger is provided with filter liquid hole, the left end bottom of filter press tank is provided with discharge pipe for solid impurity discharge, the right bottom of filter press tank is provided with liquid discharge pipe for discharging filter liquid filtered out, the filter press tank is provided with driving motor for driving rotating shaft rotation, the front end of filter press tank is provided with filter assembly for filtering garbage leachate filtered out.

[0007] Further improvement lies in that the left end of filter press tank is conical structure, and the top right side of filter press tank is provided with feed pipe.

[0008] Further improvement lies in that the filter assembly comprises a filter box mounted on the front side of the filter press tank, and filter screens are vertically and equidistantly mounted inside the filter box; a suction pump is mounted at the interface of the liquid discharge pipe, and a liquid injection pipe with the other end extending into the filter box is mounted at the liquid outlet interface of the suction pump; a discharge pipe is mounted at the bottom of the left side of the filter box, and a suction pump is also mounted at the end of the discharge pipe, and the suction pump is connected with the feed pipe on the pretreatment tank through a connecting pipe.

[0009] Further improvement lies in that the filter screens are V-shaped in structure and are invertedly mounted inside the filter box, and the filter holes formed on the three filter screens are gradually reduced in size, and flow guide plates are mounted at the discharge outlets corresponding to the lowest ends of the filter screens formed on the two sides of the filter box, and a sliding block is formed inside the discharge outlet, and a blocking plate is slidably connected in the sliding block.

[0010] Further improvement lies in that the treatment mechanism comprises a stirring shaft rotatably connected with a rotating hole formed on the top of the pretreatment tank, and a plurality of groups of stirring plates are vertically and equidistantly mounted on the stirring shaft, a transmission assembly is mounted on the stirring shaft, and a stirring motor is mounted on the pretreatment tank to drive the transmission assembly to operate, and an aeration assembly for aerating and increasing oxygen of the landfill leachate is arranged on the pretreatment tank.

[0011] Further improvement lies in that the aeration assembly comprises an air inlet channel formed on the stirring shaft, the stirring plate is hollow in structure and is connected with the air inlet channel on the stirring shaft, aeration holes are arrayed and formed through the stirring plate, an aeration pump is mounted on the pretreatment tank, and an aeration pipe with the other end connected with a bearing in the air inlet channel is mounted at the air outlet interface of the aeration pump.

[0012] By the above technical scheme, the landfill leachate pretreater provided by the utility model has at least the following beneficial effects:

[0013] 1. The utility model discloses a driving motor drives the rotation of the rotating shaft, and then drives the rotation of the filter press auger, so that the solid impurities in the mixture are sent to the left end of the filter press tank, and the landfill leachate in the sludge is discharged through the filter liquid holes on the filter press auger in the process of sending and extruding, so that the solid-liquid separation of the landfill leachate is realized.

[0014] 2. The utility model discloses that the suction pump sends the landfill leachate into the inside of the filter box, and the plurality of inverted V-shaped filter screens mounted in the filter box filter the impurities in the landfill leachate flowing through in multiple layers and stages, so that the solid impurities are intercepted.

[0015] 3. The utility model discloses a stirring shaft drives the stirring board to rotate, starts the aeration pump to pump the outside air into the air inlet channel of the stirring shaft through the aeration pipe at this moment, and injects into the landfill leachate in the pretreatment jar through the aeration hole on the stirring board, realizes the oxygen injection while stirring, thereby improve the decomposition efficiency of organic pollutants in landfill leachate of aerobic microorganism. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are intended to provide further understanding of the present application, form a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0017] In the drawings:

[0018] Figure 1 It is the whole structure schematic diagram of the utility model;

[0019] Figure 2 It is the independent side view structure schematic diagram of the filter press mechanism of the utility model;

[0020] Figure 3 It is the internal structure schematic diagram of the filter press jar of the utility model;

[0021] Figure 4 It is the internal structure schematic diagram of the filter box of the utility model;

[0022] Figure 5 It is the internal structure schematic diagram of the pretreatment jar of the utility model;

[0023] Figure 6 It is the structure schematic diagram of the rotating shaft of the utility model.

[0024] In the drawing: 1, pretreatment jar;2, filter press jar;

[0025] 3, filter press mechanism;31, rotating shaft;32, filter press auger;33, filtrate hole;34, discharge pipe;35, liquid discharge pipe;36, drive motor;

[0026] 37, filter assembly;371, filter box;372, filter screen;373, suction pump;374, liquid injection pipe;375, discharge pipe;376, deflector;377, plugging plate;

[0027] 4, processing mechanism;41, stirring shaft;42, stirring board;43, transmission assembly;44, stirring motor;

[0028] 45, aeration assembly;451, air inlet channel;452, aeration hole;453, aeration pump;454, aeration pipe. DETAILED DESCRIPTION

[0029] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0030] Embodiment 1

[0031] Based on the problem that a large amount of leachate still exists in the suspended solids and sludge filtered by the prior art, the embodiment provides a leachate pretreater, please refer to Figures 1-6 The embodiment provides a leachate pretreater, which can completely collect and pretreat leachate. The leachate pretreater comprises a filter tank 2 installed at the rear of a pretreatment tank 1, a filter press mechanism 3 for solid-liquid separation of leachate is arranged in the filter tank 2, a treatment mechanism 4 for pretreatment of filtered leachate is arranged in the pretreatment tank 1, the impurities in the leachate in the sludge impurities are completely extruded by the filter press mechanism 3 in the filter tank 2 and discharged into a filter assembly 37 for secondary filtration, so that the solid impurities in the leachate are intercepted, and the filtered leachate is pretreated by the treatment mechanism 4.

[0032] Since a large amount of leachate still exists in the suspended solids and sludge filtered by the prior art, the device is provided with a filter press mechanism 3, the filter press mechanism 3 comprises a rotating shaft 31 rotatably connected to a rotating hole formed in the pretreatment tank 1, a filter press auger 32 is installed on the rotating shaft 31, a leachate hole 33 is formed through the filter press auger 32, a discharge pipe 34 for discharging solid impurities is installed at the left end bottom of the filter tank 2, a liquid discharge pipe 35 for discharging filtered liquid extruded by the filter press is installed at the right bottom of the filter tank 2, a driving motor 36 for driving the rotating shaft 31 to rotate is installed on the filter tank 2, and a filter assembly 37 for filtering the leachate extruded by the filter press is installed at the front end of the filter tank 2. The mixture containing leachate is introduced into the inside of the filter tank 2, then the driving motor 36 is started to drive the rotating shaft 31 to rotate, thereby driving the filter press auger 32 to rotate and send the solid impurities in the mixture to the left end of the filter tank 2, the leachate in the sludge is discharged through the leachate hole 33 on the filter press auger 32 in the process of extrusion and sending, and is discharged through the liquid discharge pipe 35, so as to realize solid-liquid separation of the leachate.

[0033] The left end of the filter tank 2 is a conical structure, when the solid impurities are sent to the conical part at the left end of the filter tank 2, the solid impurities are extruded, so that the leachate in the solid impurities is completely extruded and discharged, and a feeding pipe is installed at the right top of the filter tank 2.

[0034] Since in the process of extrusion, some small impurities with the landfill leachate through the filter hole 33 on the pressure filter auger 32, so it is still necessary to intercept and filter the small impurities in the landfill leachate, so the device is also provided with a filter assembly 37, the filter assembly 37 includes a filter box 371 installed on the front side of the pressure filter tank 2, and the filter box 371 is vertically and equidistantly installed with filter screens 372 inside, and the suction pump 373 is installed at the interface of the drain pipe 35, and the liquid outlet interface of the suction pump 373 is installed with a liquid injection pipe 374 extending into the filter box 371, and the discharge pipe 375 is installed on the left side of the filter box 371, and the discharge pipe 375 is also installed with a suction pump 373 at the end, and the suction pump 373 is connected with the feed pipe on the pretreatment tank 1 through the connecting pipe, and the landfill leachate in the drain pipe 35 is pumped into the inside of the filter box 371 through the liquid injection pipe 374 by the suction pump 373, and the impurities in the landfill leachate flowing through the filter screen 372 installed in the filter box 371 are filtered in multiple layers, so as to intercept and filter the solid impurities therein.

[0035] When the filter screen 372 is used for a long time, the impurities accumulated thereon may block the filter holes, thereby affecting the filtering effect. Therefore, the filter screen 372 in the device is of V-shaped structure and is installed upside down in the filter box 371, and the filter holes formed in the three filter screens 372 are gradually reduced in size, and the guide plates 376 are installed at the discharge outlets corresponding to the lowest ends of the filter screens 372 formed on the two sides of the filter box 371, and the blocking plates 377 are slidably connected in the grooves formed inside the discharge outlets. The inverted V-shaped filter screen 372 intercepts the solid impurities which slide to one side under the action of gravity, pulls the blocking plate 377 to make it slide out of the groove, so that the solid impurities can be discharged through the discharge outlet and drained through the guide plates 376, thereby avoiding the blockage of the filter screen 372 by the impurities.

[0036] In order to make various purification treatment agents or microorganisms fully mixed with the landfill leachate and improve the treatment efficiency of the landfill leachate, the device is also provided with a treatment mechanism 4, the treatment mechanism 4 includes a stirring shaft 41 rotatably connected to the rotating hole formed in the top of the pretreatment tank 1, and a plurality of groups of stirring plates 42 are vertically and equidistantly installed on the stirring shaft 41, and a transmission assembly 43 is installed on the stirring shaft 41, and a stirring motor 44 is installed on the pretreatment tank 1 to drive the transmission assembly 43 to operate, and an aeration assembly 45 is provided on the pretreatment tank 1 to aerate and increase the oxygen of the landfill leachate, when the purification treatment agent or the biological decomposition is used to treat the landfill leachate, the stirring motor 44 is started to drive the worm of the transmission assembly 43 to rotate, thereby driving the worm gear to rotate and driving the stirring shaft 41 to rotate in the rotating hole formed in the pretreatment tank 1, thereby driving the stirring plates 42 on the stirring shaft 41 to rotate, so that the purification treatment agent or the microorganism is fully mixed with the landfill leachate, and the efficiency of the purification treatment is improved.

[0037] Example 2

[0038] Based on Example 1, such as Figures 1-6 As shown, when using aerobic microorganisms to decompose landfill leachate, in order to improve the decomposition efficiency of aerobic microorganisms, the device is also equipped with an aeration component 45. The aeration component 45 includes an air inlet channel 451 opened on the stirring shaft 41. The stirring plate 42 has a hollow structure inside and is connected to the air inlet channel 451 on the stirring shaft 41. An array of aeration holes 452 are opened through the stirring plate 42. An aeration pump 453 is installed on the pretreatment tank 1, and the exhaust port of the aeration pump 453 is equipped with an aeration pipe 454 whose other end is connected to the bearing in the air inlet channel 451. As the stirring shaft 41 drives the stirring plate 42 to rotate, the aeration pump 453 is started to pump outside air into the air inlet channel 451 opened on the stirring shaft 41 through the aeration pipe 454, and inject it into the landfill leachate in the pretreatment tank 1 through the aeration holes 452 on the stirring plate 42. Oxygen is injected at the same time as stirring, thereby improving the decomposition efficiency of aerobic microorganisms.

[0039] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leachate pre-treater comprising a filter press tank (2) installed behind a pre-treatment tank (1), characterized in that: The pressure filter tank (2) is provided with a pressure filter mechanism (3) for separating solid and liquid of the landfill leachate, and the pretreatment tank (1) is provided with a treatment mechanism (4) for pretreating the filtered landfill leachate. The pressure filter mechanism (3) comprises a rotating shaft (31) rotatably connected to a rotating hole formed in the pretreatment tank (1), and a pressure filter auger (32) is mounted on the rotating shaft (31), a filtrate hole (33) is formed through the pressure filter auger (32), a discharge pipe (34) for discharging solid impurities is mounted at the bottom of the left end of the pressure filter tank (2), a liquid discharge pipe (35) for discharging the filtered liquid filtered out by the pressure filter is mounted at the bottom of the right side of the pressure filter tank (2), a driving motor (36) for driving the rotating shaft (31) to rotate is mounted on the pressure filter tank (2), and a filter assembly (37) for filtering the landfill leachate filtered out by the pressure filter is mounted at the front end of the pressure filter tank (2).

2. A landfill leachate pre-treater according to claim 1, characterized in that: The left end of the pressure filter tank (2) is in a conical structure, and a feeding pipe is mounted at the top right side of the pressure filter tank (2).

3. The landfill leachate pre-treater of claim 1, wherein: The filter assembly (37) comprises a filter box (371) mounted on the front side of the pressure filter tank (2), and filter screens (372) are vertically and equidistantly mounted in the filter box (371), a suction pump (373) is mounted at the interface of the liquid discharge pipe (35), a liquid injection pipe (374) extending into the filter box (371) is mounted at the liquid outlet interface of the suction pump (373), a discharge pipe (375) is mounted at the bottom of the left side of the filter box (371), and a suction pump (373) is also mounted at the end of the discharge pipe (375), and the suction pump (373) is connected to the feeding pipe on the pretreatment tank (1) through a connecting pipe.

4. A landfill leachate pre-treater according to claim 3, characterized in that: The filter screens (372) are in a V-shaped structure and are inversely mounted in the filter box (371), and the filter holes formed in the three filter screens (372) are gradually reduced, and guide plates (376) are mounted at the discharge outlets corresponding to the lowest ends of the filter screens (372) formed on the two sides of the filter box (371), and a sliding block is formed in the discharge outlet, and a blocking plate (377) is slidably connected in the sliding block.

5. The landfill leachate pre-treater of claim 1, wherein: The treatment mechanism (4) comprises a stirring shaft (41) rotatably connected to a rotating hole formed in the top of the pretreatment tank (1), a plurality of groups of stirring plates (42) are vertically and equidistantly mounted on the stirring shaft (41), a transmission assembly (43) is mounted on the stirring shaft (41), a stirring motor (44) for driving the transmission assembly (43) to operate is mounted on the pretreatment tank (1), and an aeration assembly (45) for aerating and oxygenating the landfill leachate is arranged on the pretreatment tank (1).

6. A landfill leachate pre-treater according to claim 5, characterised in that: The aeration assembly (45) comprises an air inlet channel (451) formed on the stirring shaft (41), the stirring plates (42) are in a hollow structure and are connected to the air inlet channel (451) on the stirring shaft (41), aeration holes (452) are arrayed and formed through the stirring plates (42), an aeration pump (453) is mounted on the pretreatment tank (1), and an aeration pipe (454) connected to a bearing in the air inlet channel (451) at the other end is mounted at the air outlet interface of the aeration pump (453).

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