Landfill leachate environment-friendly carbon removal equipment

Abstract

The utility model discloses environment-friendly carbon removal equipment for landfill leachate, which belongs to the technical field of sewage treatment and comprises a filter pressing mechanism and a biological carbon removal pool, the filter pressing mechanism comprises a filter pressing shell, the interior of the filter pressing shell is hollow to form a leachate cavity, one side of the filter pressing shell is provided with a leachate inlet, and the bottom of the filter pressing shell is provided with an impurity outlet; a control valve and a movable push rod are arranged at the impurity outlet, a filter pressing screen cover is arranged at the bottom of the movable end of the movable push rod, the outer diameter of the filter pressing screen cover is gradually increased from bottom to top, and the top edge abuts against the inner wall of the leachate cavity; the biological carbon removal tank is arranged on one side of the filter pressing mechanism, the top of the biological carbon removal tank is provided with a liquid extraction pipe extending into the filter pressing screen cover, the liquid extraction pipe is internally connected with a liquid extraction pump, and the bottom of the biological carbon removal tank is provided with a drain outlet; according to the utility model, the high filtering efficiency of the landfill leachate is maintained, and the efficient operation of the biological carbon removal pool is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an environmentally friendly carbon removal device for landfill leachate. Background Art

[0002] Leachate refers to the water contained in the garbage itself in the landfill, rainwater, snow and other water entering the landfill. It is a high-concentration organic wastewater. If the leachate is not treated and discharged directly into the environment, it will cause serious environmental pollution. To remove organic pollutants in leachate, a more environmentally friendly biological treatment method is usually used. The activated sludge produced after biological treatment can be used as land fertilizer after subsequent treatment. However, leachate usually contains impurities such as mud, sand, and garbage fragments. These impurities are easily mixed into the activated sludge, and organic pollutants that are difficult to remove are easily retained in the impurities, resulting in the hidden danger of environmental pollution in the land fertilizer made from activated sludge. Therefore, it is necessary to pass through a small-pore filter to remove impurities such as mud and sand. However, these impurities are easy to adhere to the surface of the filter or clog the mesh of the filter, resulting in reduced filtration efficiency.

[0003] The Chinese patent with publication number CN219670304U discloses an environmentally friendly denitrification and carbon removal device for landfill leachate, comprising a garbage pool, a cover plate provided at the upper end of the garbage pool, a hydraulic rod provided inside the garbage pool, a pressure plate provided at the front end of the hydraulic rod, a filter layer provided inside the garbage pool, a liquid storage tank provided inside the garbage pool, a single-hole filter plate provided inside the garbage pool, a double-hole filter plate provided inside the garbage pool, a transition device provided on one side of the garbage pool, a liquid suction pipe provided at one end of the liquid suction pipe, a treatment tank provided at one end of the treatment tank, and a liquid storage tank provided inside the garbage pool. A transport pipe is provided in the part; the above-mentioned denitrification and carbon removal equipment squeezes the garbage in the garbage pool through hydraulic rods and pressure plates, so that the garbage leachate enters the liquid storage tank. The garbage leachate is filtered through single-hole filter plates and double-hole filter plates to remove fine impurities and then transported to the treatment tank through a transition device for treatment. However, during the filtration process, fine impurities are likely to gradually accumulate on the surface of the single-hole filter plate and the double-hole filter plate, resulting in a decrease in filtration efficiency. The filter plates need to be cleaned or replaced frequently, which affects the subsequent denitrification and carbon removal of the garbage leachate. Therefore, the denitrification and carbon removal equipment still has room for improvement. Utility Model Content

[0004] In view of the technical defects existing in the background technology, the present invention proposes an environmentally friendly carbon removal device for landfill leachate, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows:

[0005] An environment-friendly carbon removal device for landfill leachate, comprising a pressure filtration mechanism and a biological carbon removal tank. The pressure filtration mechanism includes the following structures: a pressure filtration outer shell, the interior of which is hollow to form a leachate chamber. One side of the pressure filtration outer shell is provided with a leachate inlet, and the bottom is provided with an impurity outlet, at which a control valve is arranged. A movable push rod, the fixed end of which is fixedly connected to the top of the leachate chamber and the movable end extends downward. At the bottom of the movable end of the movable push rod, there is a pressure filter mesh cover, which surrounds the bottom and the periphery of the movable push rod. The outer diameter of the pressure filter mesh cover gradually increases from the bottom to the top, and the top edge abuts against the inner wall of the leachate chamber.

[0006] The biological carbon removal tank is arranged on one side of the pressure filtration mechanism. The top of the biological carbon removal tank is provided with a liquid extraction pipe extending into the pressure filter mesh cover. A liquid extraction pump is connected in the liquid extraction pipe. The bottom of the biological carbon removal tank is provided with a sewage outlet.

[0007] As a further technical solution of the present utility model, on one side of the movable end of the movable push rod, there is a driving motor, the output end of which is provided with a driving gear. Inside the pressure filter mesh cover, there is a driven gear tooth wound around and meshing with the driving gear. The bottom of the movable end of the movable push rod and the pressure filter mesh cover are movably connected through a bearing.

[0008] As a further technical solution of the present utility model, the inner diameter of the bottom of the leachate chamber gradually increases from bottom to top, and the outer surface of the pressure filter mesh cover is provided with a spirally extending spiral tooth.

[0009] As a further technical solution of the present utility model, a sealing ring is wound around the outside of the top of the pressure filter mesh cover, and the surface of the sealing ring abuts against the inner wall of the leachate chamber.

[0010] As a further technical solution of the present utility model, the liquid extraction pipe is composed of a fixed pipe and an elastic corrugated pipe. The end of the fixed pipe is fixedly connected to the output end of the liquid extraction pump and extends to the top of the biological carbon removal tank. The end of the elastic corrugated pipe is fixedly connected to the input end of the liquid extraction pump and extends to the inner bottom of the pressure filter mesh cover.

[0011] As a further technical solution of the present utility model, an aerator is arranged on one side of the biological carbon removal tank. The output end of the aerator is provided with an air supply pipe extending into the biological carbon removal tank, and at the end of the extended air supply pipe, there is a bubble refiner.

[0012] As a further technical solution of the present utility model, a sludge return pipe is arranged on one side of the top of the biological carbon removal tank.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The utility model filters the landfill leachate through a pressure filter mesh cover. The filtered landfill leachate is sucked into a biological carbon removal pool through a liquid suction pump inside the pressure filter mesh cover for biological carbon removal. The solid impurities in the landfill leachate are intercepted by the pressure filter mesh cover and deposited at the bottom of the leachate cavity. The solid impurities are not easily attached to the surface of the pressure filter mesh cover, maintaining a high filtration efficiency. Moreover, during the extrusion process of the solid impurities by the pressure filter mesh cover, they will move along the tangent planes between each other, and the solid impurities are not easily embedded into the mesh holes of the pressure filter mesh cover, further enabling the pressure filter mesh cover to maintain a high filtration efficiency, thereby ensuring the efficient operation of the biological carbon removal pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of an environmentally friendly carbon removal device for landfill leachate.

[0016] Figure 2 is a schematic structural diagram of the pressure filtration mechanism of an environmentally friendly carbon removal device for landfill leachate in a filtration state.

[0017] Figure 3 is Figure 1 a partial schematic diagram at position A in

[0018] Figure 4 is Figure 1 a partial schematic diagram at position B in

[0019] Wherein: the pressure filtration mechanism 1, the pressure filtration outer shell 11, the leachate cavity 12, the leachate inlet 13, the impurity outlet 14, the control valve 141, the movable push rod 15, the pressure filter mesh cover 16, the driven wheel teeth 161, the spiral teeth 162, the drive motor 17, the drive gear 171, the sealing ring 18, the bearing 19, the biological carbon removal pool 2, the sewage outlet 21, the aerator 22, the aeration pipe 23, the bubble refiner 24, the sludge return pipe 25, the liquid suction pipe 3, the fixed pipe 31, the elastic corrugated pipe 32, the liquid suction pump 4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following describes the embodiments of the present utility model in conjunction with the accompanying drawings and related embodiments. The embodiments of the present utility model are not limited to the following embodiments, and the relevant necessary components involved in the present utility model should be regarded as well-known technologies in the technical field, which can be known and mastered by those skilled in the technical field.

[0021] Such as Figure 1 、 2As shown in the figure, an environment-friendly carbon removal device for landfill leachate includes a pressure filtration mechanism 1 and a biological carbon removal tank 2. The pressure filtration mechanism 1 includes the following structures: a pressure filtration housing 11, the interior of which is hollow to form a leachate chamber 12. One side of the pressure filtration housing 11 is provided with a leachate inlet 13, and the bottom is provided with an impurity outlet 14. A control valve 141 is provided at the impurity outlet 14. A movable push rod 15, the fixed end of the movable push rod 15 is fixedly connected to the top of the leachate chamber 12, and the movable end extends downward. A pressure filter mesh cover 16 is provided at the bottom of the movable end of the movable push rod 15. The pressure filter mesh cover 16 encloses the bottom and the back of the movable push rod 15. The outer diameter of the pressure filter mesh cover 16 gradually increases from the bottom to the top, and the top edge abuts against the inner wall of the leachate chamber 12.

[0022] The biological carbon removal tank 2 is arranged on one side of the pressure filtration mechanism 1. A liquid extraction pipe 3 extending into the pressure filter mesh cover 16 is provided at the top of the biological carbon removal tank 2. A liquid extraction pump 4 is connected in the liquid extraction pipe 3. A sewage outlet 21 is provided at the bottom of the biological carbon removal tank 2.

[0023] The utility model is used for carbon removal treatment of landfill leachate. In the pressure filtration mechanism 1, the leachate inlet 13 is used to flow the landfill leachate into the leachate chamber 12. The inner wall of the leachate chamber 12 is coated with an anti-sticking coating. The control valve 141 will only open when discharging solid impurities, and is in a closed state in other cases to close the impurity outlet 14, so that the landfill leachate stays in the leachate chamber 12. A water level detector can be arranged on the inner wall of the leachate chamber 12 to detect the amount of landfill leachate. When the landfill leachate reaches the set water level, the injection of landfill leachate is stopped. The side of the pressure filter mesh cover 16 is wrapped with a filter screen to separate the liquid and solid impurities in the landfill leachate. The movable push rod 15 can be an electric push rod or a hydraulic rod, which is used to move the pressure filter mesh cover 16 downward to immerse it in the landfill leachate for filtration. The filtered landfill leachate enters the interior of the pressure filter mesh cover 16. A pressure sensor is arranged inside the movable push rod 15 to detect the reaction force received when the pressure filter mesh cover 16 moves downward. In addition, when the liquid extraction pump 4 operates, it sucks the landfill leachate in the pressure filter mesh cover 16 into the biological carbon removal tank 2 through the liquid extraction pipe 3. The biological carbon removal tank 2 removes the organic pollutants in the landfill leachate through aerobic treatment or anaerobic treatment and other methods.

[0024] After adopting the above structure, the working principle of the utility model is as follows: When the garbage leachate in the leachate chamber 12 reaches the set amount, the movable push rod 15 pushes the pressure filter mesh cover 16 downward to immerse it in the garbage leachate, so that the pressure filtration mechanism 1 is in a filtering state. The liquid in the garbage leachate passes through the pressure filter mesh cover 16 and enters the inside of the pressure filter mesh cover 16, and is then sucked by the liquid pump 4 into the biological decarbonization tank 2. The solid impurities are intercepted by the pressure filter mesh cover 16 and gradually deposited at the bottom of the leachate chamber 12. After filtering the garbage leachate multiple times, a large amount of solid impurities will be deposited in the leachate chamber 12. The reaction force received by the movable push rod 15 when pushing the pressure filter mesh cover 16 downward will become larger and larger. When the reaction force reaches the set threshold, the movable push rod 15 pushes the pressure filter mesh cover 16 to continue squeezing the solid impurities to filter out the garbage leachate to the greatest extent. Then, the movable push rod 15 pulls the pressure filter mesh cover 16 upward to reset, opens the control valve 141 to discharge the solid impurities in the leachate chamber 12, and then closes the control valve 141 and injects the garbage leachate through the leachate inlet 13 to continue filtering, and so on in a cycle.

[0025] It should be noted that the surface shape of the pressure filter mesh cover 16 is in the shape of an inverted frustum. During the process of filtering the garbage leachate, the solid impurities will be deposited at the bottom of the leachate chamber 12 under the action of their own gravity, so it is not easy to adhere to the surface of the pressure filter mesh cover 16. Moreover, when the pressure filter mesh cover 16 squeezes the solid impurities, the pressure filter mesh cover 16 will move along the tangent plane between it and the solid impurities, and the tiny particles in the solid impurities are not easy to embed into the mesh holes of the filter net, thus avoiding the blockage of the mesh holes, and further enabling the pressure filter mesh cover 16 to maintain a high filtration efficiency, and then ensuring that the garbage leachate is efficiently transported to the biological decarbonization tank 2 for decarbonization treatment.

[0026] To sum up, the utility model filters the garbage leachate through the pressure filter mesh cover 16. The filtered garbage leachate is sucked into the biological decarbonization tank 2 by the liquid pump 4 inside the pressure filter mesh cover 16 for biological decarbonization. The solid impurities in the garbage leachate are intercepted by the pressure filter mesh cover 16 and deposited at the bottom of the leachate chamber 12. The solid impurities are not easy to adhere to the surface of the pressure filter mesh cover 16 and maintain a high filtration efficiency. Moreover, during the process of the pressure filter mesh cover 16 squeezing the solid impurities, it will move along the tangent plane between them, and the solid impurities are not easy to embed into the mesh holes of the pressure filter mesh cover 16, further enabling the pressure filter mesh cover 16 to maintain a high filtration efficiency, thus ensuring the efficient operation of the biological decarbonization tank 2.

[0027] Such as Figure 1 、 3As shown, as one of the preferred embodiments of the present utility model, a driving motor 17 is provided on one side of the movable end of the movable push rod 15. A driving gear 171 is provided at the output end of the driving motor 17. A driven gear tooth 161 meshing with the driving gear 171 is wound inside the pressure filter screen cover 16. The bottom of the movable end of the movable push rod 15 is movably connected to the pressure filter screen cover 16 through a bearing 19. The movable end of the movable push rod 15 is coaxially arranged with the bearing 19. When the driving motor 17 works, the driving gear 171 can be rotated. The rotating driving gear 171 drives the pressure filter screen cover 16 to rotate along the axis through meshing transmission with the driven gear tooth 161. Since the garbage leachate contains solid impurities such as sediment, the water in these solid impurities has a certain viscosity after being squeezed, so that a certain amount of solid impurities will adhere to the surface of the pressure filter screen cover 16. Although these solid impurities will re-deposit at the bottom of the leachate chamber 12 after re-contacting with the garbage leachate, there will always be more solid impurities remaining in the leachate chamber 12, shortening the time interval between two discharges of solid impurities. And when discharging solid impurities each time, the pressure filter screen cover 16 is driven to rotate by the driving motor 17. The centrifugal force generated when the pressure filter screen cover 16 rotates causes the solid impurities on its surface to fall off, thereby reducing the residual amount of solid impurities.

[0028] As Figure 1 , 2 shown, as one of the preferred embodiments of the present utility model, the inner diameter of the bottom of the leachate chamber 12 gradually increases from bottom to top, so that the bottom of the leachate chamber 12 forms an inclined plane, making it easy to discharge solid impurities. A spiral tooth 162 extending spirally is provided on the outer surface of the pressure filter screen cover 16. When the pressure filter screen cover 16 rotates, the pressure filter screen cover 16 can be rotated into the solid impurities through the spiral tooth 162 on its surface, increasing the contact area between the pressure filter screen cover 16 and the solid impurities. Then, the pressure filter screen cover 16 is driven to rotate in the reverse direction by the driving motor 17, and the solid impurities are squeezed downward through the spiral tooth 162, so as to better squeeze out the water in the solid impurities.

[0029] As Figure 1 , 4 shown, as one of the preferred embodiments of the present utility model, a sealing ring 18 is wound around the outside of the top of the pressure filter screen cover 16. The surface of the sealing ring 18 abuts against the inner wall of the leachate chamber 12. The sealing ring 18 is preferably made of materials such as rubber. The sealing ring 18 enables the pressure filter screen cover 16 to move normally in the vertical direction and rotate along the axis while ensuring the sealing degree between the pressure filter screen cover 16 and the inner wall of the leachate chamber 12, preventing liquid from splashing into the inside of the pressure filter screen cover 16 when the pressure filter screen cover 16 filters the garbage leachate or squeezes solid impurities.

[0030] As Figure 1 , 2As shown, as one of the preferred embodiments of the present utility model, the liquid extraction pipe 3 is composed of a fixed pipe 31 and an elastic corrugated pipe 32. The end of the fixed pipe 31 is fixedly connected to the output end of the liquid extraction pump 4 and extends to the top of the biological carbon removal tank 2. The end of the elastic corrugated pipe 32 is fixedly connected to the input end of the liquid extraction pump 4 and extends to the inner bottom of the pressure filter mesh cover 16. The elastic corrugated pipe 32 has good tensile elasticity, and its bottom end serves as the inlet for sucking the landfill leachate. During the vertical movement of the pressure filter mesh cover 16, the elastic corrugated pipe 32 stretches and contracts so that its bottom end is always located at the inner bottom of the pressure filter mesh cover 16, enabling the liquid extraction pump 4 to always suck the landfill leachate in the pressure filter mesh cover 16 through the elastic corrugated pipe 32, and then injecting the sucked landfill leachate into the biological carbon removal tank 2 through the fixed pipe 31.

[0031] As Figure 1 , 2 As shown, as one of the preferred embodiments of the present utility model, an aerator 22 is provided on one side of the biological carbon removal tank 2. The output end of the aerator 22 is provided with an air supply pipe 23 extending into the biological carbon removal tank 2. The end of the air supply pipe 23 is provided with a bubble refiner 24. One side of the top of the biological carbon removal tank 2 is provided with a sludge return pipe 25. The biological carbon removal tank 2 of the present utility model uses aerobic microorganisms to perform biological carbon removal on the landfill leachate. When the aerator 22 operates, it generates air with a certain pressure and transports it to the bubble refiner 24 through the air supply pipe 23. These air form a number of small bubbles dispersed in the landfill leachate through the bubble refiner 24, increasing the oxygen solubility of the landfill leachate, promoting the growth and reproduction of aerobic microorganisms and decomposing the organic pollutants in the landfill leachate. Activated sludge will be formed at the bottom of the biological carbon removal tank 2 during the decomposition of organic pollutants. The activated sludge and the landfill leachate that has completed carbon removal are discharged through the sewage outlet 21. When treating the next batch of landfill leachate, part of the activated sludge flows back to the biological carbon removal tank 2 through the sludge return pipe 25 for supplementing aerobic microorganisms.

[0032] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. An environmentally friendly carbon removal device for landfill leachate, comprising a pressure filtration mechanism (1) and a biological carbon removal tank (2), characterized in that, The filter press mechanism (1) includes the following structures: a filter press housing (11), which is hollow inside to form a leachate chamber (12). One side of the filter press housing (11) is provided with a leachate inlet (13) and the bottom is provided with an impurity outlet (14). A control valve (141) is provided at the impurity outlet (14). A movable push rod (15), the fixed end of the movable push rod (15) is fixedly connected to the top of the leachate chamber (12) and the movable end extends downward. At the bottom of the movable end of the movable push rod (15), there is a filter mesh cover (16). The filter mesh cover (16) surrounds the bottom and the side of the movable push rod (15). The outer diameter of the filter mesh cover (16) gradually increases from the bottom to the top and the top edge abuts against the inner wall of the leachate chamber (12). The biological carbon removal tank (2) is arranged on one side of the filter press mechanism (1). A liquid extraction pipe (3) extending into the filter mesh cover (16) is provided at the top of the biological carbon removal tank (2). A liquid extraction pump (4) is connected in the liquid extraction pipe (3). A sewage outlet (21) is provided at the bottom of the biological carbon removal tank (2).

2. The environmentally friendly carbon removal equipment for landfill leachate according to claim 1, characterized in that, On one side of the movable end of the movable push rod (15), there is a driving motor (17). A driving gear (171) is provided at the output end of the driving motor (17). A driven gear tooth (161) meshing with the driving gear (171) is wound inside the filter mesh cover (16). The bottom of the movable end of the movable push rod (15) is movably connected to the filter mesh cover (16) through a bearing.

3. The environmentally friendly carbon removal equipment for landfill leachate according to claim 1, characterized in that, The inner diameter of the bottom of the leachate chamber (12) gradually increases from bottom to top. A spiral tooth (162) extending spirally is provided on the outer surface of the filter mesh cover (16).

4. The environmentally friendly carbon removal equipment for landfill leachate according to claim 1, characterized in that, A sealing ring (18) is wound around the outside of the top of the filter mesh cover (16). The surface of the sealing ring (18) abuts against the inner wall of the leachate chamber (12).

5. The environmental protection carbon removal equipment for landfill leachate according to claim 1, characterized in that, The liquid extraction pipe (3) is composed of a fixed pipe (31) and an elastic corrugated pipe (32). The end of the fixed pipe (31) is fixedly connected to the output end of the liquid extraction pump (4) and extends to the top of the biological carbon removal tank (2). The end of the elastic corrugated pipe (32) is fixedly connected to the input end of the liquid extraction pump (4) and extends to the inner bottom of the filter mesh cover (16).

6. The environmentally friendly carbon removal device for landfill leachate according to claim 1, characterized in that, An aerator (22) is provided on one side of the biological carbon removal tank (2). An air supply pipe (23) extending into the biological carbon removal tank (2) is provided at the output end of the aerator (22). A bubble refiner (24) is provided at the end of the extended air supply pipe (23).

7. The environmental protection carbon removal equipment for landfill leachate according to claim 1, characterized in that, A sludge return pipe (25) is provided on one side of the top of the biological carbon removal tank (2).

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