Filtering device for landfill leachate pretreatment

Abstract

The utility model discloses a filter device for landfill leachate pretreatment, which relates to the technical field of landfill leachate treatment and comprises a box body, the box body is divided into a liquid inlet box and a liquid outlet box based on a filter plate, and the filter plate is obliquely arranged; the liquid inlet pipe is positioned on the inclined upward side of the filter plate; a lead screw is arranged in the liquid inlet box, a motor is arranged outside the box body, and the lead screw penetrates out of the liquid inlet box to be connected with an output shaft of the motor. A scraping plate is arranged in the liquid inlet box and is in contact with the surface of the filter plate; the scraping plate is arranged on the lead screw in a penetrating manner; waste discharge pipelines are arranged on the two sides of the liquid inlet box, solid waste discharge ports are formed in the downward inclined ends of the waste discharge pipelines, and compressed air inlets are formed in the upward inclined ends of the waste discharge pipelines; and a baffle plate is movably arranged between the waste discharge pipeline and the liquid inlet box. According to the utility model, the filter plate is obliquely arranged, and the scraping plate and the waste discharge pipeline are arranged, so that the filter plate can be effectively prevented from being covered by large-particle solids, impurities and the like, and the filter efficiency of landfill leachate can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of garbage leachate treatment, in particular to a filtering device for pre-treatment of garbage leachate. Background Art

[0002] In a landfill, because the garbage itself contains moisture, as well as rain and snow water that enters the landfill, a high-concentration organic wastewater, namely leachate, is produced; if not properly handled, it will cause serious pollution to the surrounding water and soil.

[0003] Generally, before the landfill leachate is formally treated, it is necessary to remove large solid particles and impurities in the landfill leachate; however, when the existing landfill leachate filtration device is in use, its filter screen is easily covered by large solid particles and impurities, which seriously affects the filtration efficiency of the landfill leachate. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art. The utility model provides a filtering device for pre-treatment of landfill leachate. By tilting the filter plate and arranging a scraper and a waste discharge pipe, the filter plate can be effectively prevented from being covered by large particles of solids and impurities, which is beneficial to improving the filtering efficiency of the landfill leachate.

[0005] The utility model provides a filtering device for pre-treatment of landfill leachate, the filtering device comprising a box body, the box body is divided into an inlet box and an outlet box based on a filter plate, the filter plate is arranged upwardly and obliquely from front to back, the box wall of the inlet box and the filter plate are perpendicular to each other, and the box wall of the outlet box and the ground are perpendicular to each other;

[0006] The liquid inlet box is connected with a liquid inlet pipe, and the liquid inlet pipe is located on a side of the filter plate that is inclined upward; a screw rod is arranged across from left to right in the liquid inlet box, and the screw rod is arranged in the box wall of the liquid inlet box based on a bearing for rotation; a motor is fixedly arranged on the outside of the box body based on a bracket, and one end of the screw rod passes through the liquid inlet box and is connected to the output shaft of the motor; a scraper is arranged inside the liquid inlet box, and the scraper extends from front to back, and the scraper contacts the surface of the filter plate; the scraper is passed on the screw rod based on a movable nut;

[0007] Waste discharge pipes are arranged on both sides of the liquid inlet box, the waste discharge pipes are connected with the liquid inlet box, the waste discharge pipes are arranged upwardly and tilted from front to back, a solid waste discharge outlet is arranged at one end of the waste discharge pipe tilted downward, and a compressed air inlet is arranged at one end of the waste discharge pipe tilted upward; a baffle plate is movably arranged between the waste discharge pipe and the liquid inlet box, and the baffle plate is driven by the cylinder to approach or move away from the bottom surface of the waste discharge pipe along the outer wall of the liquid inlet box;

[0008] A liquid drain hopper and a plurality of legs are arranged at the bottom of the liquid outlet box, and the plurality of legs are distributed around the liquid drain hopper.

[0009] Specifically, the angle between the filter plate and the horizontal plane is 25-35°.

[0010] Specifically, a liquid baffle plate is provided inside the liquid inlet box at one side close to the liquid inlet pipe, and the liquid baffle plate and the box wall of the liquid inlet box surround to form a liquid baffle cavity, and the opening of the liquid baffle cavity faces the filter plate.

[0011] Specifically, grooves are provided on the inner walls of both sides of the liquid inlet box, and the grooves are partially matched with the scraper; when the scraper is embedded in the grooves, the scraper seals the inner wall of the liquid inlet box.

[0012] Specifically, at least two guide rods are arranged across from left to right in the liquid inlet box, the at least two guide rods and the screw rod are parallel to each other, and the scraper is passed through the at least two guide rods.

[0013] Specifically, guide grooves are provided on the outer walls of both sides of the liquid inlet box, and a convex block is formed on one side of the blocking plate close to the liquid inlet box, and the convex block is slidably arranged in the guide grooves;

[0014] The blocking plate is driven by the two cylinders to move along the outer wall of the liquid inlet box close to or away from the bottom surface of the waste discharge pipe.

[0015] Specifically, a transparent cover is provided on the top of the liquid inlet box.

[0016] Specifically, the diameter of the filter holes of the filter plate gradually increases in a direction away from the liquid inlet box.

[0017] Specifically, the liquid inlet pipe is connected to the liquid inlet box based on the water distribution tank, and the liquid outlet direction of the liquid inlet pipe is perpendicular to the water distribution tank.

[0018] Specifically, a transparent inspection window is provided on the back of the liquid outlet box.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] When the filter device for pre-treatment of landfill leachate of the utility model is used, landfill leachate of a preset flow rate mixed with large solid particles and impurities is injected into the liquid inlet box from the liquid inlet pipe, flows from top to bottom along the surface of the filter plate, and the landfill leachate passes through the filter plate into the liquid outlet box, while the large solid particles and impurities remain on the filter plate; since the filter plate is arranged obliquely, the landfill leachate has a flushing effect on the filter plate, so that the large solid particles and impurities will be flushed to the side of the filter plate inclined downward, and are not easy to cover and accumulate on the surface of the filter plate, which is conducive to improving the filtering efficiency of the landfill leachate;

[0021] At the same time, the motor is started to drive the screw to rotate, and the rotating screw drives the scraper to move slowly along the surface of the filter plate. During the movement, the scraper will scrape the large particles of solids and impurities on the surface of the filter plate to the waste pipe; when the scraper fits the inner wall of the liquid inlet tank, the cylinder is started to lift the barrier plate to connect the waste pipe with the liquid inlet tank, and compressed air is introduced into the compressed air inlet to allow large particles of solids and impurities to enter the waste pipe and then be discharged along the solid waste outlet; the scraper can continuously scrape off the large particles of solids and impurities on the surface of the filter plate to prevent large particles of solids and impurities from covering and accumulating on the surface of the filter plate, which is beneficial to improving the filtration efficiency of the leachate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the front structure of the filter device in the embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the first cross-sectional structure of the filter device in the embodiment of the utility model;

[0025] Figure 3 It is a second cross-sectional structural schematic diagram of the filtering device in the embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of the rear structure of the filtering device in the embodiment of the utility model.

[0027] In the accompanying drawings, 10, filter plate; 100, liquid inlet box; 110, liquid inlet pipe; 111, water distribution box; 120, liquid baffle plate; 130, groove; 140, transparent cover; 200, liquid outlet box; 210, liquid drain bucket; 220, support foot; 230, transparent inspection window; 310, screw rod; 320, motor; 330, scraper; 340, guide rod; 400, waste discharge pipe; 410, solid waste discharge outlet; 420, compressed air inlet; 430, baffle plate; 440, cylinder. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The utility model provides a filtering device for pre-treating landfill leachate, the filtering device comprising a box body, Figure 1 The front side structural diagram of the filter device in the embodiment of the utility model is shown. Figure 2 The first cross-sectional structure diagram of the filter device in the embodiment of the utility model is shown. Figure 3 A second cross-sectional structural schematic diagram of the filtering device in an embodiment of the utility model is shown, wherein the box body is divided into an inlet box 100 and an outlet box 200 based on the filter plate 10, and the filter plate 10 is arranged upwardly and obliquely from front to back, and the box wall of the inlet box 100 and the filter plate 10 are perpendicular to each other, and the box wall of the outlet box 200 and the ground are perpendicular to each other; the inlet box 100 is connected to a liquid inlet pipe 110, and the liquid inlet pipe 110 is located on the side of the filter plate 10 obliquely upward.

[0030] When the filter device for pre-treatment of landfill leachate of the utility model is used, landfill leachate of a preset flow rate mixed with large solid particles and impurities is injected into the liquid inlet box 100 from the liquid inlet pipe 110, and flows from top to bottom along the surface of the filter plate 10. The landfill leachate passes through the filter plate 10 and enters the liquid outlet box 200, while the large solid particles and impurities remain on the filter plate 10. Since the filter plate 10 is arranged obliquely, the landfill leachate has a flushing effect on the filter plate 10, so that the large solid particles and impurities will be flushed to the side of the filter plate 10 that is inclined downward, and are not easy to cover or accumulate on the surface of the filter plate 10, which is beneficial to improving the filtering efficiency of the landfill leachate.

[0031] See also Figure 1 , Figure 2 and Figure 3A screw rod 310 is arranged across from left to right in the liquid inlet box 100, and the screw rod 310 is arranged in the box wall of the liquid inlet box 100 based on the bearing for rotation; a motor 320 is fixedly arranged on the outside of the box body based on the bracket, and one end of the screw rod 310 passes through the liquid inlet box 100 and is connected to the output shaft of the motor 320; a scraper 330 is arranged inside the liquid inlet box 100, and the scraper 330 extends from front to back, and the scraper 330 contacts the surface of the filter plate 10; the scraper 330 is passed through the screw rod 310 based on the movable nut; the liquid inlet box Waste discharge pipes 400 are arranged on both sides of 100, and the waste discharge pipes 400 are connected with the liquid inlet tank 100. The waste discharge pipes 400 are arranged to be inclined upward from front to back, and a solid waste discharge outlet 410 is arranged at the inclined downward end of the waste discharge pipe 400, and a compressed air inlet 420 is arranged at the inclined upward end of the waste discharge pipe 400; a baffle plate 430 is movably arranged between the waste discharge pipe 400 and the liquid inlet tank 100, and the baffle plate 430 is driven by the cylinder 440 to move along the outer wall of the liquid inlet tank 100 close to or away from the bottom surface of the waste discharge pipe 400.

[0032] The screw rod 310 is driven to rotate by starting the motor 320, and the rotating screw rod 310 drives the scraper 330 to move slowly along the surface of the filter plate 10. The scraper 330 will scrape the large solid particles and impurities on the surface of the filter plate 10 to the waste discharge pipe 400 during the movement; when the scraper 330 is in contact with the inner wall of the liquid inlet box 100, the cylinder 440 is started to lift the blocking plate 430, so that the waste discharge pipe 400 and the liquid inlet box 100 are connected, and compressed air is introduced into the compressed air inlet 420, so that large solid particles and impurities enter the waste discharge pipe 400, and then are discharged along the solid waste discharge port 410; the scraper 330 can continuously scrape off the large solid particles and impurities on the surface of the filter plate 10 to prevent the large solid particles and impurities from covering and accumulating on the surface of the filter plate 10, which is beneficial to improving the filtration efficiency of the landfill leachate; the waste discharge pipe 400 is also inclined and is provided with a compressed air inlet 420, which can more smoothly discharge the large solid particles and impurities from the solid waste discharge port 410.

[0033] The bottom of the liquid outlet box 200 is provided with a drain hopper 210 and a plurality of legs 220, and the plurality of legs 220 are distributed around the drain hopper 210. The legs 220 support the liquid outlet box 200 and provide sufficient installation space for the drain hopper 210; the drain hopper 210 can gather the filtered landfill leachate together for cleaner and more thorough discharge.

[0034] In some specific embodiments, the angle between the filter plate 10 and the horizontal plane is 25-35°. If the angle between the filter plate 10 and the horizontal plane is less than 25°, the scouring effect of the landfill leachate on the filter plate 10 is weak, and large solid particles and impurities are easily covered and accumulated on the filter plate 10. If the angle between the filter plate 10 and the horizontal plane is greater than 35°, the landfill leachate flows too fast, which weakens the efficiency of the landfill leachate passing through the filter plate 10, and easily causes liquid to accumulate on the side of the liquid inlet box 100 that is tilted downward. Preferably, the angle between the filter plate 10 and the horizontal plane is 30°.

[0035] In some specific embodiments, see Figure 2 The liquid inlet box 100 is provided with a liquid baffle plate 120 at one side close to the liquid inlet pipe 110. The liquid baffle plate 120 and the box wall of the liquid inlet box 100 surround and form a liquid baffle cavity, and the opening of the liquid baffle cavity faces the filter plate 10. When the garbage leachate mixed with large solid particles and impurities is injected into the liquid inlet box 100 from the liquid inlet pipe 110, the garbage leachate is forced to flush vertically toward the filter plate 10 under the obstruction of the liquid baffle plate 120, so that it can be better filtered from the filter plate 10; the splashing of the garbage leachate can also be reduced.

[0036] In some specific embodiments, see Figure 2 and Figure 3 , grooves 130 are provided on the inner walls of both sides of the liquid inlet box 100, and the grooves 130 and the scraper 330 are partially matched; when the scraper 330 is embedded in the grooves 130, the scraper 330 seals the inner wall of the liquid inlet box 100. In this way, the sealing performance of the scraper 330 when it is attached to the liquid inlet box 100 can be further improved, thereby preventing the landfill leachate from entering the waste discharge pipe 400. Specifically, when the scraper 330 is embedded in the grooves 130, there is still a large enough waste discharge cavity between the scraper 330 and the baffle plate 430, which can accommodate a certain amount of large solid particles and impurities.

[0037] In some specific embodiments, see Figure 2 and Figure 3 At least two guide rods 340 are arranged across the liquid inlet box 100 from left to right, the at least two guide rods 340 and the screw rod 310 are parallel to each other, and the scraper 330 is passed through the at least two guide rods 340. The guide rods 340 can improve the running stability of the scraper 330, keep the scraper 330 in contact with the surface of the filter plate 10, and prevent the scraper 330 from deflecting.

[0038] In some specific embodiments, guide grooves are provided on both sides of the outer wall of the liquid inlet box 100, and a protrusion is formed on the side of the blocking plate 430 close to the liquid inlet box 100, and the protrusion is slidably arranged in the guide groove; the blocking plate 430 approaches or moves away from the bottom surface of the waste discharge pipe 400 along the outer wall of the liquid inlet box 100 based on the driving of the two cylinders 440. In this way, the operation stability of the blocking plate 430 can be improved, the deviation of the blocking plate 430 can be avoided, and the blocking plate 430 can form a good seal with the outer wall of the liquid inlet box 100.

[0039] In some specific embodiments, see Figure 1 A transparent cover 140 is provided on the top of the liquid inlet box 100 to facilitate the staff to observe the internal state of the liquid inlet box 100 to ensure that the liquid inlet box 100 works well; specifically, the main body of the transparent cover 140 is a plexiglass sheet.

[0040] In some specific embodiments, the diameter of the filter holes of the filter plate 10 gradually increases in a direction away from the liquid inlet box 100 , which can effectively reduce the risk of clogging of the filter plate 10 .

[0041] Figure 4 The rear side structure diagram of the filter device in the embodiment of the utility model is shown. The liquid inlet pipe 110 is connected to the liquid inlet box 100 based on the water distribution box 111. Please refer to Figure 2 The liquid outlet direction of the liquid inlet pipe 110 is perpendicular to the water distribution box 111. The water distribution box 111 can disperse the garbage leachate before entering the liquid inlet box 100, which is beneficial to diffuse the garbage leachate to the entire filter plate 10 to improve its filtration efficiency.

[0042] In some specific embodiments, see Figure 4 A transparent inspection window 230 is provided on the back of the liquid outlet box 200 to facilitate the staff to observe the internal state of the liquid outlet box 200 to ensure that the liquid outlet box 200 works well; specifically, the main body of the transparent inspection window 230 is a plexiglass sheet.

[0043] The working principle of the filtering device for pretreatment of landfill leachate of the utility model is as follows:

[0044] The landfill leachate to be treated is connected to the liquid inlet pipe 110, and the landfill leachate of a preset flow rate mixed with large solid particles and impurities is injected into the liquid inlet box 100 from the liquid inlet pipe 110, and flows from top to bottom along the surface of the filter plate 10, and the landfill leachate passes through the filter plate 10 and enters the liquid outlet box 200, while the large solid particles and impurities remain on the filter plate 10;

[0045] The scraper 330 is used to scrape off the large solid particles and impurities on the filter plate 10; the motor 320 is started, the motor 320 drives the screw 310 to rotate, and the rotating screw 310 drives the scraper 330 to slowly move along the surface of the filter plate 10. During the movement, the scraper 330 scrapes the large solid particles and impurities on the surface of the filter plate 10 toward the waste pipe 400; when the scraper 330 fits the inner wall of the liquid inlet box 100, the cylinder 440 is started to lift the blocking plate 430, so that the waste pipe 400 and the liquid inlet box 100 are connected, and the waste pipe 400 and the liquid inlet box 100 are compressed. Compressed air is introduced into the air inlet 420 to allow large particles of solids and impurities to enter the waste discharge pipe 400 and then be discharged through the solid waste discharge port 410; then, the cylinder 440 is started to lower the baffle plate 430 to block the connection between the waste discharge pipe 400 and the liquid inlet tank 100, and the introduction of compressed air is stopped; then, the motor 320 is started to drive the screw rod 310 to rotate in the reverse direction, and the reverse rotating screw rod 310 drives the scraper 330 to move slowly along the surface of the filter plate 10 toward the other side, so as to scrape off the large particles of solids and impurities on the surface of the filter plate 10 again.

[0046] It should be noted that after the preset flow rate of landfill leachate enters the liquid inlet box 100, when it flows from the upper end of the inclined filter plate 10 to the lower end, the filtration is completed and no liquid will accumulate at the lower end. A flow control valve can be provided at the liquid inlet pipe 110 to limit the flow rate of the landfill leachate to a predetermined value. In addition, a drainage pump can be provided at the outlet of the drainage hopper 210 to accelerate the discharge of the filtered landfill leachate, so that a certain negative pressure is formed in the liquid outlet box 200, which can accelerate the filtration speed of the landfill leachate.

[0047] In the filtration device for pre-treatment of landfill leachate of the utility model, since the filter plate 10 is arranged obliquely, the landfill leachate has a flushing effect on the filter plate 10, so that large particles of solids and impurities will be flushed to the side of the filter plate 10 that is inclined downward, and are not easy to cover or accumulate on the surface of the filter plate 10, which is beneficial to improving the filtration efficiency of the landfill leachate; the scraper 330 can continuously scrape off large particles of solids and impurities on the surface of the filter plate 10, avoiding large particles of solids and impurities from covering or accumulating on the surface of the filter plate 10, which is beneficial to improving the landfill leachate filtration efficiency. The filtration efficiency of the liquid is improved; the waste discharge pipe 400 is also inclined and is provided with a compressed air inlet 420, which can more smoothly discharge large particles of solids and impurities from the solid waste discharge port 410; the liquid baffle plate 120 can force the landfill leachate to flush vertically toward the filter plate 10, so that it can be better filtered from the filter plate 10, and the splashing of the landfill leachate can also be reduced; the transparent cover 140 and the transparent inspection window 230 make it convenient for the staff to observe the internal conditions of the liquid inlet box 100 and the liquid outlet box 200 to ensure that the filtering device works well.

[0048] The above is a detailed introduction to a filtering device for pretreatment of landfill leachate provided by an embodiment of the utility model. Specific examples are used herein to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for a person skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A filtering device for pre-treatment of landfill leachate, characterized in that: The filtering device comprises a box body, the box body is divided into a liquid inlet box and a liquid outlet box based on the filter plate, the filter plate is arranged upwardly and obliquely from front to back, the box wall of the liquid inlet box and the filter plate are perpendicular to each other, and the box wall of the liquid outlet box and the ground are perpendicular to each other; The liquid inlet box is connected with a liquid inlet pipe, and the liquid inlet pipe is located on a side of the filter plate that is inclined upward; a screw rod is arranged across from left to right in the liquid inlet box, and the screw rod is arranged in the box wall of the liquid inlet box based on a bearing for rotation; a motor is fixedly arranged on the outside of the box body based on a bracket, and one end of the screw rod passes through the liquid inlet box and is connected to the output shaft of the motor; a scraper is arranged inside the liquid inlet box, and the scraper extends from front to back, and the scraper contacts the surface of the filter plate; the scraper is passed on the screw rod based on a movable nut; Waste discharge pipes are arranged on both sides of the liquid inlet box, the waste discharge pipes are connected with the liquid inlet box, the waste discharge pipes are arranged upwardly and tilted from front to back, a solid waste discharge outlet is arranged at one end of the waste discharge pipe tilted downward, and a compressed air inlet is arranged at one end of the waste discharge pipe tilted upward; a baffle plate is movably arranged between the waste discharge pipe and the liquid inlet box, and the baffle plate is driven by the cylinder to approach or move away from the bottom surface of the waste discharge pipe along the outer wall of the liquid inlet box; A liquid drain hopper and a plurality of legs are arranged at the bottom of the liquid outlet box, and the plurality of legs are distributed around the liquid drain hopper.

2. The filtration device for pretreatment of landfill leachate according to claim 1, characterized in that: The included angle between the filter plate and the horizontal plane is 25-35°.

3. The filtration device for pretreatment of landfill leachate according to claim 1, characterized in that: The liquid inlet box is provided with a liquid baffle plate inside on one side close to the liquid inlet pipe, and the liquid baffle plate and the box wall of the liquid inlet box surround to form a liquid baffle cavity, and the opening of the liquid baffle cavity faces the filter plate.

4. The filtration device for pretreatment of landfill leachate according to claim 1, characterized in that: The inner walls of both sides of the liquid inlet box are provided with grooves, and the grooves are partially matched with the scraper; when the scraper is embedded in the grooves, the scraper seals the inner wall of the liquid inlet box.

5. The filtration device for pretreatment of landfill leachate according to claim 1, characterized in that: At least two guide rods are arranged across from left to right in the liquid inlet box, the at least two guide rods and the screw rod are parallel to each other, and the scraper is passed through the at least two guide rods.

6. The filtration device for pretreatment of landfill leachate according to claim 1, characterized in that: The outer walls of both sides of the liquid inlet box are provided with guide grooves, and a convex block is formed on one side of the blocking plate close to the liquid inlet box, and the convex block is slidably arranged in the guide grooves; The blocking plate is driven by the two cylinders to move along the outer wall of the liquid inlet box close to or away from the bottom surface of the waste discharge pipe.

7. The filtration device for pre-treatment of landfill leachate according to claim 1, characterized in that: A transparent cover is arranged on the top of the liquid inlet box.

8. The filtration device for pre-treatment of landfill leachate according to claim 1, characterized in that: The diameter of the filter holes of the filter plate gradually increases in a direction away from the liquid inlet box.

9. The filtration device for pretreatment of landfill leachate according to claim 1, characterized in that: The liquid inlet pipe is connected to the water distribution tank and the liquid inlet tank, and the liquid outlet direction of the liquid inlet pipe is perpendicular to the water distribution tank.

10. The filtration device for pre-treatment of landfill leachate according to claim 1, characterized in that: A transparent inspection window is arranged on the back of the liquid outlet box.

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