Leachate membrane concentrated solution recycling treatment device

Abstract

The invention relates to a leachate membrane concentrated solution recycling device, and relates to the technical field of concentrated solution recycling treatment, the leachate membrane concentrated solution recycling device comprises a flow dividing box, an incineration mechanism and a lime pulping mechanism, a first water inlet used for injecting primary pulp is formed in the side wall of the upper end of a pretreatment chamber, a first liquid outlet is formed in the bottom of a first desalination chamber, and the first liquid outlet is connected with a second box body; a second liquid outlet is formed in the bottom in the first concentration chamber and connected with a lime pulping mechanism, a nanofiltration membrane is arranged in the second box body and divides the interior of the first box body into a second desalination chamber and a second concentration chamber, and the first liquid outlet is connected with the side wall of the box body above the second concentration chamber; a water outlet is formed in the bottom of the box body of the second desalination chamber, and a third liquid outlet is formed in the bottom of the second concentration chamber and is connected with the incineration mechanism. The method has the effect of further relieving the problem of environmental pollution caused by concentrated solution treatment.

Description

Technical Field

[0001] The present application relates to the field of concentrated liquid recovery and treatment technology, and in particular to a leachate membrane concentrated liquid recycling and treatment device. Background Art

[0002] With the growing awareness of environmental protection and increasing requirements for waste disposal, the treatment of landfill leachate has become a key research area in the waste management field. Membrane treatment processes are widely used in landfill leachate treatment. However, when leachate is treated using membrane processes such as reverse osmosis (RO), nanofiltration (NF), or disc-tube reverse osmosis (DTRO), leachate membrane concentrate is produced. The treatment of this wastewater, characterized by high salinity and high residual organic matter, has become a critical step and a challenge in the overall leachate management process. Properly addressing the treatment of leachate membrane concentrate is crucial for improving the overall efficiency and quality of leachate treatment, reducing potential environmental hazards, and promoting the sustainable development of the waste management industry. Furthermore, effective leachate membrane concentrate treatment can achieve rational resource utilization, aligning with today's social pursuit of energy conservation, emission reduction, and a circular economy, and positively impacting the development of the environmental protection industry.

[0003] Currently, the two conventional methods for treating membrane leachate concentrate are direct landfill or simple incineration. Direct landfill involves transporting the concentrate to a designated landfill for disposal, while simple incineration involves sending the concentrate directly to an incinerator for combustion. These two treatment methods have been relatively common in the past, with companies selecting the appropriate treatment method based on factors such as their own facilities and processing costs. However, these two methods have long been used within the industry without fully considering the long-term needs of resource utilization and environmental protection.

[0004] The existing methods of directly disposing of membrane leachate concentrate by landfill or simple incineration have significant drawbacks. These treatment methods not only result in a significant waste of resources, as reusable components in the membrane leachate concentrate remain unrecovered and unrecovered, but also pose the risk of hazardous substances seeping into the soil and groundwater when directly landfilled, while simple incineration can generate large amounts of harmful gases released into the atmosphere, significantly increasing environmental risks. Summary of the Invention

[0005] In order to further alleviate the environmental pollution problem caused by the treatment of concentrated liquid, the present application provides a leachate membrane concentrated liquid recycling treatment device.

[0006] The present application provides a leachate membrane concentrate recycling treatment device that adopts the following technical solution: A leachate membrane concentrate recycling treatment device comprises a diversion box, an incineration mechanism and a lime pulping mechanism, the diversion box comprises a first box body and a second box body, the first box body is provided with a coarse filter membrane for primary screening of suspended matter and an ED filter membrane for chloride ion separation, the coarse filter membrane and the ED aluminum membrane divide the interior of the first box body into a pretreatment chamber, a first desalination chamber and a first concentrating chamber, the upper end side wall of the pretreatment chamber is provided with a first water inlet for raw pulp injection, the bottom of the first desalination chamber is provided with a first liquid outlet, the first liquid outlet is connected to the second box body, the first concentrating chamber is provided with a first water inlet for raw pulp injection, the first water inlet is connected to the second box body, the first concentrating chamber is provided with a first water inlet ... first concentrating chamber, the first water inlet is connected to the first concentrating chamber, the first water inlet is connected to the first concentrating chamber, the first water inlet is connected to the first concentrating chamber, the first water inlet is connected to the first concentrating chamber, the first water inlet is connected to the first concentrating chamber, the first water inlet is connected to the first concentrating chamber, the first water inlet is connected to the first concentrating chamber, the first water inlet is connected to the first concentrating chamber, the first water inlet is connected A second liquid outlet is provided at the bottom of the chamber, which is connected to a lime pulping mechanism, which is used to treat a high chloride ion solution. A nanofiltration membrane is provided in the second box body, which divides the interior of the first box body into a second desalination chamber and a second concentrating chamber. The first liquid outlet is connected to the side wall of the box body above the second concentrating chamber. A drain outlet is provided at the bottom of the second desalination chamber box body, and a third liquid outlet is provided at the bottom of the second concentrating chamber. The third liquid outlet is connected to an incineration mechanism, which is used to treat a high-concentration COD solution.

[0007] By adopting the above technical solution, the coarse filter membrane of the diverter box preliminarily screens suspended matter, and the ED filter membrane separates chloride ions, which can preliminarily treat the leachate membrane concentrate; the pretreatment chamber, the first desalination chamber and the first concentration chamber formed by the coarse filter membrane and the ED filter membrane are convenient for classified storage of different components; the diverter box transports the separated high chloride ion solution to the lime pulping mechanism for treatment, and the COD solution to the second box for treatment, and then further treats the COD solution through the nanofiltration membrane of the second box and separates the second desalination chamber and the second concentration chamber, discharges water that meets the requirements, further increases the concentration of the COD solution, and then transports it to the incineration mechanism for treatment, avoiding the waste of resources and environmental risks caused by direct external landfill or simple incineration treatment, and realizing the reasonable reuse of the leachate membrane concentrate.

[0008] In a specific feasible implementation scheme, the incineration mechanism includes a high-chlorine solution storage tank, a combustion furnace, and an exhaust gas treatment unit. The upper end of the high-chlorine solution storage tank is connected to the second liquid outlet, and a drain port is provided at the bottom of the high-chlorine solution storage tank. An atomizer is provided inside the combustion furnace, and the atomizer is installed at the top end of the combustion furnace. The drain port is connected to the atomizer, and the combustion furnace is equipped with a burner. The exhaust gas force transmission unit is connected to the combustion furnace through a pipeline for treating the exhaust gas generated after combustion.

[0009] By adopting the above technical solution, the incineration mechanism can store high-chlorine solution, the atomizer can fully disperse the high-chlorine solution to facilitate combustion, the burner provides support for combustion, and the exhaust gas treatment unit can treat the exhaust gas generated after combustion, reducing pollution to the environment and achieving effective treatment of high-chlorine solution.

[0010] In a specific embodiment, the lime slurrying mechanism includes a mixing tank and a stirring device, one side of the upper end of the mixing tank is connected to the third liquid outlet, and the other side is equipped with a quantitative feeding piece for adding lime powder. The stirring device is installed in the mixing tank and is used to mix the high-concentration COD solution with the lime powder.

[0011] By adopting the above technical solution, the diversion box can perform preliminary screening and chloride ion separation on the leachate membrane concentrate, diverting it into different solutions, and then using a mixing tank to receive the high-concentration COD solution, and adding lime powder through a quantitative feeding piece, and then using a stirring device to mix the two. This can achieve effective treatment of the leachate membrane concentrate and avoid the waste of resources and environmental risks caused by direct transportation to landfill or simple incineration.

[0012] In a specific feasible implementation scheme, the stirring device includes a support, a stirring motor, a first pulley and a second pulley, a limiting rack and a stirring rod. The support is installed on the top of the mixing tank, the stirring motor is installed on the support, the first pulley is installed on the output shaft of the stirring motor, the second pulley is rotatably connected to the support seat, and the axial center of the second pulley is rotatably connected to the limiting rod, the limiting rod is rotatably connected to one end of the fiber pool field away from the second pulley, the stirring rod is rotatably connected to the support, and the stirring rod extends along the center of the mixing tank, a limiting gear is coaxially installed on the stirring rod, and a U-shaped plate is rotatably connected to the stirring rod, the limiting gear is arranged between the two side walls of the U-shaped plate, the limiting rack passes through the U-shaped plate and meshes with the limiting gear, and the side wall of the limiting rack on the untoothed side can fit the side wall of the U-shaped plate, and the first stirring blade is installed on the stirring rod.

[0013] By adopting the above technical solution, high-concentration COD solution and lime powder can be mixed and stirred in the leachate membrane concentrate recycling device. Specifically, the stirring motor installed on the top support of the mixing tank drives the first pulley to operate, and cooperates with the second pulley and the relevant transmission structure to rotate the stirring rod, so that the first stirring blade installed on the stirring rod works to achieve stirring, effectively promoting the full mixing of the high-concentration COD solution and the lime powder.

[0014] In a specific embodiment, a plurality of first stirring blades are provided, and the plurality of first stirring blades are evenly installed on the circumference of the stirring rod.

[0015] By adopting the above technical solution, a plurality of first stirring blades are evenly installed on the circumference of the stirring rod, which can more fully stir and mix the high-concentration COD solution and lime powder in the mixing tank, thereby improving the treatment efficiency.

[0016] In a specific feasible implementation plan, it also includes a limiting sleeve, a first bevel gear, a second bevel gear and a third bevel gear. The limiting sleeve is rotatably connected to the lower end of the stirring rod. The first bevel gear is installed on the stirring rod and is located below the first stirring blade. The third bevel gear is installed on the upper end of the limiting sleeve. The second bevel gear is provided in two groups. The two groups of second bevel gears are symmetrically installed between the first bevel gear and the second bevel gear, and the upper and lower ends of the second bevel gear are respectively meshed with the first bevel gear and the second bevel gear. The second stirring blade is installed on the limiting sleeve.

[0017] By adopting the above technical solution, the lime pulping mechanism can process high-chloride ion solution; the stirring device can be used to mix high-concentration COD solution with lime powder; on this basis, the limit sleeve is rotatably connected to the lower end of the stirring rod, and the first bevel gear, second bevel gear and third bevel gear are engaged with each other for transmission, so that the second stirring blade on the limit sleeve and the first stirring blade on the stirring rod can stir the high-concentration COD solution and lime powder together, thereby enhancing the mixing effect.

[0018] In a specific embodiment, a plurality of second stirring blades are provided, and the plurality of second stirring blades are evenly installed on the circumferential portion of the limiting sleeve.

[0019] By adopting the above technical solution, multiple second stirring blades evenly installed around the limiting sleeve can further expand the stirring range and improve the mixing degree and mixing efficiency of the high-concentration COD solution and lime powder.

[0020] In a specific possible implementation scheme, it also includes a protective shell, a protective cavity is provided inside the protective shell, the upper end of the protective shell is fixedly connected to the stirring rod, the first bevel gear, the second bevel gear and the third bevel gear are provided in the protective cavity, and the lower end of the protective shell is rotatably connected to the side wall of the limit sleeve.

[0021] By adopting the above technical solution, by setting a protective shell between the stirring rod and the limiting sleeve and placing the first bevel gear, the second bevel gear and the third bevel gear in the protective cavity, the transmission components can be protected, the erosion of external impurities can be reduced, and the transmission stability can be improved.

[0022] In a specific embodiment, the invention further comprises a chloride ion sensor and a first solenoid valve, wherein the first solenoid valve is installed at the first liquid outlet, and the chloride ion sensor is installed in the first desalination chamber.

[0023] By adopting the above technical solution, a chloride ion sensor is used to detect the chloride ion concentration in the first desalination chamber. In combination with the first solenoid valve installed at the first liquid outlet, the flow rate and timing of the liquid entering the second tank from the first desalination chamber can be flexibly controlled according to the detection results, thereby achieving more accurate and effective liquid diversion processing and ensuring subsequent processing of the device.

[0024] In a specific embodiment, the invention further comprises a COD sensor and a second solenoid valve, wherein the second solenoid valve is installed at the third liquid outlet, and the COD sensor is installed in the second concentration chamber.

[0025] By adopting the above technical solution, a COD sensor is installed in the second concentrating chamber and a second solenoid valve is installed in the third liquid outlet, so that the COD concentration of the solution in the second concentrating chamber can be monitored in real time. When the set value is reached, the second solenoid valve is controlled to open, so that the high-concentration COD solution flows into the incineration mechanism for treatment, thereby achieving precise control of the discharge of the high-concentration COD solution and improving the treatment efficiency and pertinence.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Pre-treat the leachate membrane concentrate and separate chloride ions through the coarse filter membrane and ED filter membrane of the diversion box, reducing environmental pollution and resource waste; 2. The lime pulping mechanism is used to treat high-chloride ion solutions, and the incineration mechanism is used to treat high-concentration COD solutions, achieving effective treatment of leachate membrane concentrate; 3. It solves the problem of waste of resources and increased environmental risks caused by the existing method of directly transporting leachate to landfill or simply incinerating leachate membrane concentrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of an embodiment of the present application.

[0028] Figure 2 This is a cross-sectional view of the diverter box.

[0029] Figure 3 Schematic diagram of the structure of the stirring device.

[0030] Figure 4 A cross-sectional view of the stirring device.

[0031] Explanation of reference numerals: 1. diverter box; 11. first box body; 111. pretreatment chamber; 112. first desalination chamber; 113. first concentration chamber; 114. first water inlet; 115. first liquid outlet; 116. second liquid outlet; 12. second box body; 121. third liquid outlet; 122. second desalination chamber; 123. second concentration chamber; 13. coarse filtration membrane; 14. ED membrane; 15. nanofiltration membrane; 2. incineration mechanism; 21. high chlorine solution storage tank; 22. combustion furnace; 23. tail gas Processing unit; 3. Lime pulping mechanism; 4. Stirring device; 41. Support; 42. Stirring motor; 43. First pulley; 44. Second pulley; 45. Limit rack; 46. Stirring stick; 461. First stirring blade; 47. U-shaped plate; 48. Limit sleeve; 481. Second stirring blade; 49. First bevel gear; 50. Second bevel gear; 51. Third bevel gear; 52. Protective shell; 6. Chloride ion sensor; 7. First solenoid valve; 8. COD sensor; 9. Second solenoid valve. DETAILED DESCRIPTION

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] The embodiment of the present application discloses a leachate membrane concentrate recycling treatment device.

[0034] like Figure 1 As shown, the leachate membrane concentrate recycling device includes a diversion box 1, an incineration mechanism 2, and a lime pulping mechanism 3. The diversion box 1, the incineration mechanism 2, and the lime pulping mechanism 3 cooperate with each other to effectively divert the leachate membrane concentrate, and respectively treat the high chloride ion solution and high COD concentration solution therein in a targeted manner, avoiding the waste of resources and environmental risks caused by direct landfill or incineration, and improving resource utilization efficiency.

[0035] like Figure 2As shown, the diversion box 1 includes a first box body 11 and a second box body 12. A coarse filter membrane 13 and an ED membrane 14 are provided in the first box body 11. The coarse filter membrane 13 is generally provided with a porous structure and can be made of ceramic or polymer. It performs preliminary screening of suspended matter in the leachate membrane concentrate. The coarse filter membrane 13 and the ED membrane 14 divide the interior of the first box body 11 into a pretreatment chamber 111, a first desalination chamber 112, and a first concentration chamber 113. The first water inlet 114 on the upper side wall of the pretreatment chamber 111 is used for raw slurry injection. This water inlet can be connected to an external leachate membrane concentrate delivery pipeline by means of a flange connection pipe or the like. A first liquid outlet 115 is provided at the bottom of the first desalination chamber 112. It is connected to the second box body 12 by welding or by using a sealed pipe fitting. The first liquid outlet 115 can be made of a corrosion-resistant plastic or metal pipe. The second liquid outlet 116 at the bottom of the first concentrating chamber 113 is connected to the lime slurry making mechanism 3 , also using a suitable pipeline.

[0036] A nanofiltration membrane 15 is installed within the second housing 12, further separating the liquid entering the second housing 12. The nanofiltration membrane 15, which can be made of a material such as a polyamide membrane, divides the interior of the second housing 12 into a second desalination chamber 122 and a second concentrating chamber 123. A first liquid outlet 115 is connected to the housing sidewall above the second concentrating chamber 123, allowing liquid flowing out of the first liquid outlet 115 to flow smoothly into the second concentrating chamber 123. A drain is provided at the bottom of the second desalination chamber 122, allowing the treated, cleaner water to be discharged. A valve can be installed at the drain to facilitate drainage control. A third liquid outlet 121 at the bottom of the second concentrating chamber 123 is connected to the incineration mechanism 2.

[0037] It also includes a chloride ion sensor 6, a first solenoid valve 7, a COD sensor 8 and a second solenoid valve 9. The first solenoid valve 7 is installed at the first liquid outlet 115, the chloride ion sensor 6 is installed in the first desalination chamber 112, the second solenoid valve 9 is installed at the third liquid outlet 121, and the COD sensor 8 is installed in the second concentration chamber 123. The chloride ion sensor 6 and the COD sensor 8 are both electrically connected to the control system. By setting the chloride ion concentration and the COD solution concentration, the first solenoid valve 7 or the second solenoid valve 9 is opened when the liquid concentration in the box reaches a certain threshold.

[0038] The incineration mechanism 2 is mainly used for treating high-concentration COD solution. It includes a high-chloride solution storage tank 21, a combustion furnace 22, and an exhaust gas treatment unit 23. The high-chloride solution storage tank 21 can be made of corrosion-resistant carbon steel, etc., and its upper end is connected to the second liquid outlet 116, the purpose of which is to store the high-chloride solution from the first concentration chamber 113. A drain port is provided at the bottom of the high-chloride solution storage tank 21, and this drain port can use a metal ball valve to control the liquid discharge. An atomizer is provided inside the combustion furnace 22, and the atomizer is installed at the top part of the combustion furnace 22. It can be a pressure atomizer or other types. The drain port is connected to the atomizer and can be connected with a high-pressure hose. The combustion furnace 22 is equipped with a burner, which provides a fire source for solution combustion. It can use a gas burner or an oil burner. The tail gas treatment unit 23 is connected to the combustion furnace 22 through a pipeline, and can treat the tail gas generated after combustion. The pipeline here must also be made of corrosion-resistant materials. The tail gas treatment unit 23 can include purification equipment such as a desulfurization tower and denitrification equipment.

[0039] The lime slurrying mechanism 3 is used to process the high-chloride ion solution and includes a mixing tank and a stirring device 4. The mixing tank is made of materials such as stainless steel. One side of its upper end is connected to the third liquid outlet 121 for receiving high-concentration COD. The other side of its upper end is equipped with a quantitative feeding mechanism for adding lime powder. The quantitative feeding mechanism can adopt a structure such as a screw feeder to accurately control the amount of lime powder added. The stirring device 4 is installed in the mixing tank to mix the high-concentration COD solution and lime powder. The bottom of the mixing tank is provided with a bucket-shaped discharge port for discharging the material.

[0040] like Figure 3 and Figure 4 As shown, the stirring device 4 includes a support 41, a stirring motor 42, a first pulley 43, a second pulley 44, a limiting rack 45, and a stirring rod 46. As part of the lime slurrying mechanism 3, the stirring device 4 plays a key role in mixing the high-concentration COD solution with the lime powder. Its unique design ensures more complete mixing and improves the treatment effect.

[0041] Specifically, the support 41 is installed on the top of the mixing tank. It can be welded from profiles and plays the role of supporting the entire stirring device 4. The stirring motor 42 is installed on the support 41. The motor converts electrical energy into mechanical energy to provide the power required for stirring. The power of the motor is selected according to factors such as the size of the mixing tank and the processing capacity. A three-phase asynchronous motor or other types can be used. The first pulley 43 is installed on the output shaft of the stirring motor 42 and it rotates with the output shaft of the motor. The second pulley 44 is rotatably connected to the support seat, and the axis of the second pulley 44 is rotatably connected to a limit rod. One end of this limit rod is rotatably connected to the second pulley 44, and the other end is rotatably connected to other components. Although the original text here is a bit unclear, it roughly forms a rotating connection relationship. The stirring rod 46 is rotatably connected to the support 41 and extends along the center of the mixing tank. A limiting gear is coaxially installed on the stirring rod 46 and is rotatably connected to a U-shaped plate 47. The limiting gear is set between the two side walls of the U-shaped plate 47. The limiting rack 45 passes through the U-shaped plate 47 and meshes with the limiting gear. The sidewall of the limiting rack 45 on the side without teeth can fit the sidewall of the U-shaped plate 47. In this way, when the first pulley 43 drives the second pulley 44 to rotate, and after a series of transmissions, the stirring rod 46 is also rotated. The first stirring blade 461 on the stirring rod 46 stirs the liquid and lime powder in the mixing tank during the rotation process. The first stirring blade 461 can be a paddle type, a turbine type, etc., and multiple first stirring blades 461 are evenly installed around the stirring rod 46 to achieve more thorough stirring.

[0042] The mixing device further comprises a limiting sleeve 48, a first bevel gear 49, a second bevel gear 50, a third bevel gear 51, and a protective shell 52. The coordinated cooperation of these components can enhance the effect and range of stirring.

[0043] Specifically, the limiting sleeve 48 is rotatably connected to the lower end of the stirring rod 46. The limiting sleeve 48 can be a metal sleeve, etc., and its function is to ensure the stability of the relevant components during the rotation process. The first bevel gear 49 is installed on the stirring rod 46 and is located below the first stirring blade 461. The first bevel gear 49 and the second bevel gear 50 are usually made of steel, etc., and their tooth design must meet the transmission requirements. There are two groups of second bevel gears 50, and the two groups of second bevel gears 50 are symmetrically installed between the first bevel gear 49 and the third bevel gear 51, and their upper and lower ends are respectively meshed with the first bevel gear 49 and the third bevel gear 51. In this way, through gear transmission, the second stirring blade 481 on the limiting sleeve 48 can be driven to rotate, and there are also several second stirring blades 481, which are evenly installed on the circumferential part of the limiting sleeve 48. A protective cavity is defined within the protective shell 52. The upper end of the protective shell 52 is fixedly connected to the stirring rod 46. The first bevel gear 49, the second bevel gear 50, and the third bevel gear 51 are disposed within the protective cavity. The lower end of the protective shell 52 is rotatably connected to the sidewall of the limiting sleeve 48. The protective shell 52 protects the gears and other components from interference and erosion by external impurities, thereby extending the service life of the components.

[0044] The implementation principle of the leachate membrane concentrate recycling treatment device in the embodiment of the present application is as follows: the leachate membrane concentrate recycling device can effectively divert and treat the leachate membrane concentrate through the synergistic effect of the diversion box 1, the incineration mechanism 2 and the lime pulping mechanism 3. Compared with the existing method of direct external landfill or simple incineration, it avoids the waste of resources because some substances in the leachate membrane concentrate can be recovered. At the same time, the high-chloride solution and the high-concentration COD solution are treated in a targeted manner, which reduces the pollution of harmful gases and harmful substances to the environment, improves the overall efficiency and quality of landfill leachate treatment, and promotes the recycling of resources and the sustainable development of the environmental protection industry.

[0045] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A leachate membrane concentrate recycling treatment device, characterized by: The invention comprises a diversion box (1), an incineration mechanism (2) and a lime pulping mechanism (3), wherein the diversion box (1) comprises a first box body (11) and a second box body (12), wherein a coarse filter membrane (13) for primary screening of suspended matter and an ED filter membrane for chloride ion separation are provided in the first box body (11), wherein the coarse filter membrane (13) and the ED aluminum membrane divide the interior of the first box body (11) into a pretreatment chamber (111), a first desalination chamber (112) and a first concentration chamber (113), wherein a first water inlet (114) for raw pulp injection is installed on the upper side wall of the pretreatment chamber (111), a first liquid outlet (115) is provided at the bottom of the first desalination chamber (112), and the first liquid outlet (115) is connected to the second box body (12), and the bottom of the first concentration chamber (113) is provided with a first water inlet (114) for raw pulp injection. A second liquid outlet (116) is provided, the second liquid outlet (116) is connected to a lime pulping mechanism (3), the lime pulping mechanism (3) is used for treating a high chloride ion solution, a nanofiltration membrane (15) is provided in the second box (12), the nanofiltration membrane (15) divides the interior of the first box (11) into a second desalination chamber (122) and a second concentrating chamber (123), the first liquid outlet (115) is connected to the side wall of the box above the second concentrating chamber (123), a drain port is provided at the bottom of the second desalination chamber (122), a third liquid outlet (121) is provided at the bottom of the second concentrating chamber (123), the third liquid outlet (121) is connected to an incineration mechanism (2), and the incineration mechanism (2) is used for treating a high-concentration COD solution.

2. The leachate membrane concentrate recycling treatment device according to claim 1, characterized in that: The incineration mechanism (2) comprises a high-chlorine solution storage tank (21), a combustion furnace (22), and an exhaust gas treatment unit (23). The upper end of the high-chlorine solution storage tank (21) is connected to the second liquid outlet (116), and a drainage port is provided at the bottom of the high-chlorine solution storage tank (21). An atomizer is provided inside the combustion furnace (22), and the atomizer is installed at the top end of the combustion furnace (22). The drainage port is connected to the atomizer, and the combustion furnace (22) is equipped with a burner. The exhaust gas transmission unit is connected to the combustion furnace (22) through a pipeline and is used to treat the exhaust gas generated after combustion.

3. The leachate membrane concentrate recycling treatment device according to claim 1, characterized in that: The lime slurry making mechanism (3) comprises a mixing tank and a stirring device (4). One side of the upper end of the mixing tank is connected to the third liquid outlet (121), and the other side is equipped with a quantitative feeding piece for adding lime powder. The stirring device (4) is installed in the mixing tank and is used to mix the high-concentration COD solution with the lime powder.

4. The leachate membrane concentrate recycling treatment device according to claim 3, characterized in that: The stirring device (4) comprises a support (41), a stirring motor (42), a first pulley (43), a second pulley (44), a limiting rack (45) and a stirring rod (46), wherein the support (41) is mounted on the top of the mixing tank, the stirring motor (42) is mounted on the support (41), the first pulley (43) is mounted on the output shaft of the stirring motor (42), the second pulley (44) is rotatably connected to the support, and the axis of the second pulley (44) is rotatably connected to the limiting rod, and the limiting rod is away from the second pulley (44) and is connected to the fiber pool field. The stirring rod (46) is rotatably connected to the support (41), and the stirring rod (46) extends along the center of the mixing tank. A limiting gear is coaxially installed on the stirring rod (46), and a U-shaped plate (47) is rotatably connected to the stirring rod (46). The limiting gear is arranged between the two side walls of the U-shaped plate (47). The limiting rack (45) passes through the U-shaped plate (47) and is engaged with the limiting gear. The side wall of the limiting rack (45) on the side without teeth can fit the side wall of the U-shaped plate (47). The stirring rod (46) is equipped with a first stirring blade (461).

5. The leachate membrane concentrate recycling treatment device according to claim 4, characterized in that: There are a plurality of first stirring blades (461), and the plurality of first stirring blades (461) are evenly installed on the circumference of the stirring rod (46).

6. The leachate membrane concentrate recycling treatment device according to claim 3, characterized in that: The invention also includes a limiting sleeve (48), a first bevel gear (49), a second bevel gear (50) and a third bevel gear (51), wherein the limiting sleeve (48) is rotatably connected to the lower end of the stirring rod (46), the first bevel gear (49) is mounted on the stirring rod (46) and is located below the first stirring blade (461), the third bevel gear (51) is mounted on the upper end of the limiting sleeve (48), the second bevel gear (50) is provided with two groups, the two groups of second bevel gears (50) are symmetrically mounted between the first bevel gear (49) and the second bevel gear (50), and the upper and lower ends of the second bevel gear (50) are respectively meshed with the first bevel gear (49) and the second bevel gear (50), and the second stirring blade (481) is mounted on the limiting sleeve (48).

7. The leachate membrane concentrate recycling treatment device according to claim 6, characterized in that: A plurality of the second stirring blades (481) are provided, and the plurality of second stirring blades (481) are evenly installed on the circumferential portion of the limiting sleeve (48).

8. The leachate membrane concentrate recycling treatment device according to claim 6, characterized in that: The invention also includes a protective shell (52), wherein a protective cavity is provided inside the protective shell (52), the upper end of the protective shell (52) is fixedly connected to the stirring rod (46), the first bevel gear (49), the second bevel gear (50) and the third bevel gear (51) are provided in the protective cavity, and the lower end of the protective shell (52) is rotatably connected to the side wall of the limiting sleeve (48).

9. The leachate membrane concentrate recycling treatment device according to claim 1, characterized in that: It also includes a chloride ion sensor (6) and a first electromagnetic valve (7), wherein the first electromagnetic valve (7) is installed at the first liquid outlet (115), and the chloride ion sensor (6) is installed in the first desalination chamber (112).

10. The leachate membrane concentrate recycling treatment device according to claim 1, characterized in that: The device further comprises a COD sensor (8) and a second electromagnetic valve (9), wherein the second electromagnetic valve (9) is installed at the third liquid outlet (121), and the COD sensor (8) is installed in the second concentration chamber (123).

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