A leachate membrane concentrate recycling treatment device

Abstract

This application relates to a leachate membrane concentrate recycling device, which falls under the field of concentrate recovery and treatment technology. It includes a diversion box, an incineration mechanism, and a lime slurry preparation mechanism. A first inlet for injecting raw slurry is installed on the upper side wall of the pretreatment chamber. A first outlet is provided at the bottom of the first desalination chamber and is connected to a second tank. A second outlet is provided at the bottom of the first concentration chamber and is connected to the lime slurry preparation mechanism. A nanofiltration membrane is installed inside the second tank, dividing the interior of the first tank into a second desalination chamber and a second concentration chamber. The first outlet is connected to the side wall of the tank above the second concentration chamber. A drain outlet is provided at the bottom of the second desalination chamber. A third outlet is provided at the bottom of the second concentration chamber and is connected to the incineration mechanism. This application has the effect of further mitigating the environmental pollution problems caused by the treatment of concentrate.

Description

Technical Field

[0001] This application relates to the field of concentrate recovery and treatment technology, and in particular to a leachate membrane concentrate reuse treatment device. Background Technology

[0002] With the deepening of environmental protection concepts and increasingly stringent requirements for waste treatment, the treatment of landfill leachate has become an important research direction in the field of waste management. Membrane treatment processes are widely used in landfill leachate treatment; however, after using membrane processes such as reverse osmosis (RO), nanofiltration (NF), or disc tube reverse osmosis (DTRO) to treat landfill leachate, leachate membrane concentrate is generated. The treatment of this wastewater, characterized by high salt content and high organic residue, has become a key link and a difficult problem to be solved in the entire process of landfill leachate treatment. Solving the problem of leachate membrane concentrate treatment is of great significance for improving the overall efficiency and quality of landfill leachate treatment, reducing potential environmental hazards, and promoting the sustainable development of the waste management industry. Furthermore, effective treatment of leachate membrane concentrate can also achieve the rational utilization of resources, which aligns with today's pursuit of energy conservation, emission reduction, and a circular economy, and has a positive impact on promoting the development of the environmental protection industry.

[0003] Currently, the conventional methods for treating leachate membrane concentrate in practice are direct landfill disposal and simple incineration. Direct landfill disposal involves transporting the leachate membrane concentrate to a designated landfill site for dumping; simple incineration involves directly feeding the leachate membrane concentrate into an incineration facility for combustion. These two methods have been prevalent in past leachate membrane concentrate treatment work, with companies choosing the appropriate method based on their own facility conditions, treatment costs, and other factors. However, the long-term use of these two methods in the industry has not adequately considered the long-term needs of resource utilization and environmental protection.

[0004] Existing methods of directly transporting leachate concentrate to landfills or simply incinerating it have significant drawbacks. These methods not only result in a massive waste of resources, as reusable components in the leachate concentrate remain unextracted and unrecovered, but also pose significant environmental risks. Direct landfilling may allow hazardous substances to leach into the soil and groundwater, while simple incineration may release large amounts of harmful gases into the atmosphere. Summary of the Invention

[0005] To further mitigate the environmental pollution caused by treating concentrate, this application provides a leachate membrane concentrate recycling treatment device.

[0006] The leachate membrane concentrate reuse treatment device provided in this application adopts the following technical solution: A leachate membrane concentrate recycling treatment device includes a diversion box, an incineration mechanism, and a lime slurry preparation mechanism. The diversion box includes a first chamber and a second chamber. The first chamber is equipped with a coarse filter membrane for initial screening of suspended solids and an ED filter membrane for chloride ion separation. The coarse filter membrane and the ED aluminum membrane divide the interior of the first chamber into a pretreatment chamber, a first desalination chamber, and a first concentration chamber. The upper side wall of the pretreatment chamber is equipped with a first inlet for injecting raw slurry. The bottom of the first desalination chamber is equipped with a first outlet connected to the second chamber. The first concentration chamber... A second liquid outlet is provided at the bottom of the chamber, and the second liquid outlet is connected to a lime slurry preparation mechanism. The lime slurry preparation mechanism is used to treat high chloride ion solutions. A nanofiltration membrane is provided inside the second chamber, and the nanofiltration membrane divides the interior of the first chamber into a second desalination chamber and a second concentration chamber. The first liquid outlet is connected to the side wall of the chamber above the second concentration chamber. A drain outlet is provided at the bottom of the second desalination chamber. A third liquid outlet is provided at the bottom of the second concentration chamber, and the third liquid outlet is connected to an incineration mechanism. The incineration mechanism is used to treat high concentration COD solutions.

[0007] By adopting the above technical solution, the coarse filtration membrane of the diversion box initially screens suspended solids, 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 filtration membrane and the ED filter membrane facilitate the classified storage of different components. The diversion box transports the separated high chloride ion solution to the lime pulping unit for processing, and the COD solution to the second tank for processing. The COD solution is then further processed by the nanofiltration membrane in the second tank, and the second desalination chamber and the second concentration chamber are separated. Water that meets the requirements is discharged, and the concentration of the COD solution is further increased. Then it is transported to the incineration unit for processing, avoiding the waste of resources and environmental risks caused by direct transportation to landfill or simple incineration, and realizing the rational reuse of leachate membrane concentrate.

[0008] In one specific implementation scheme, the incineration mechanism includes a high-concentration COD solution storage tank, a combustion furnace, and a tail gas treatment unit. The upper end of the high-concentration COD solution storage tank is connected to a second liquid outlet, and a drain port is provided at the bottom of the high-concentration COD solution storage tank. An atomizer is provided inside the combustion furnace and is installed at the top of the combustion furnace. The drain port is connected to the atomizer. A burner is installed in the combustion furnace. The tail gas transmission unit is connected to the combustion furnace through a pipeline and is used to treat the tail gas generated after combustion.

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

[0010] In one specific implementation, the lime slurry preparation mechanism includes a mixing tank and a stirring device. One side of the upper end of the mixing tank is connected to a third liquid outlet, and the other side is equipped with a metering feeder for adding lime powder. The stirring device is installed inside the mixing tank and is used to mix the high-chlorine solution with the lime powder.

[0011] By adopting the above technical solution, the diversion box can perform preliminary screening and chloride ion separation of leachate membrane concentrate, diverting it into different solutions. Then, the high-chlorine solution is received by the mixing tank, and lime powder is added by the quantitative feeding device. The two are then mixed by the stirring device, which can achieve effective treatment of leachate membrane concentrate and avoid resource waste and environmental risks caused by direct transportation to landfill or simple incineration.

[0012] In one specific implementation, 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, and a limiting rod is rotatably connected to the center of the second pulley shaft. The end of the limiting rod opposite to the second pulley is rotatably connected to the fiber tray end. The stirring rod is rotatably connected to the support and 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 disposed 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 without teeth can fit against the side wall of the U-shaped plate. A first stirring blade is installed on the stirring rod.

[0013] By adopting the above technical solution, high-chlorine solution and lime powder can be mixed and stirred in the leachate membrane concentrate recycling device. Specifically, the stirring motor installed on the support at the top of the mixing tank drives the first pulley to rotate, and the second pulley and related transmission structure work together to make the stirring rod rotate, thereby making the first stirring blade installed on the stirring rod work to achieve stirring, effectively promoting the full mixing of high-chlorine solution and lime powder.

[0014] In one specific implementation, a plurality of first stirring blades are provided, and the plurality of first stirring blades are evenly installed on the circumferential part of the stirring rod.

[0015] By adopting the above technical solution, several first stirring blades are evenly installed on the circumferential part of the stirring rod, which can more fully stir and mix the high-chlorine solution and lime powder in the mixing tank, thereby improving the processing efficiency.

[0016] In one specific implementation scheme, the system further 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 mounted on the stirring rod and located below the first stirring blade. The third bevel gear is mounted on the upper end of the limiting sleeve. Two sets of second bevel gears are provided, and the two sets of second bevel gears are symmetrically mounted between the first bevel gear and the second bevel gear. The upper and lower ends of the second bevel gear are respectively meshed with the first bevel gear and the second bevel gear. The limiting sleeve is equipped with a second stirring blade.

[0017] By adopting the above technical solution, the lime slurry preparation mechanism can process high chloride ion solutions; the stirring device can mix the high chloride solution with lime powder; on this basis, the limiting sleeve is rotatably connected to the lower end of the stirring rod, and the first bevel gear, the second bevel gear and the third bevel gear mesh with each other to drive the second stirring blade on the limiting sleeve and the first stirring blade on the stirring rod together to stir the high chloride solution and lime powder, thereby enhancing the mixing effect.

[0018] In one specific implementation scheme, a plurality of second stirring blades are provided, and the plurality of second stirring blades are evenly installed on the circumferential part of the limiting sleeve.

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

[0020] In one specific implementation scheme, a protective shell is also included, the protective shell having a protective cavity inside, the upper end of the protective shell being fixedly connected to the stirring rod, the first bevel gear, the second bevel gear, and the third bevel gear being disposed in the protective cavity, and the lower end of the protective shell being rotatably connected to the side wall of the limiting sleeve.

[0021] By adopting the above technical solution, by setting a protective shell between the stirring roller 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, external impurities can be reduced, and transmission stability can be improved.

[0022] In one specific implementation scheme, the system further includes 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, the chloride ion concentration in the first desalination chamber is detected by a chloride ion sensor. In conjunction with the first solenoid valve installed at the first liquid outlet, the flow rate and timing of liquid entering the second tank from the first desalination chamber can be flexibly controlled according to the detection results, so as to achieve more accurate and effective liquid diversion and treatment and ensure the subsequent processing of the device.

[0024] In one specific implementation, the system further includes a COD sensor and a second solenoid valve, the second solenoid valve being installed at a third outlet and the COD sensor being installed in a second concentration chamber.

[0025] By adopting the above technical solution, a COD sensor is installed in the second concentration chamber and a second solenoid valve is installed at the third outlet. The COD concentration of the solution in the second concentration 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 unit for treatment. This achieves precise control of the emission of high-concentration COD solution and improves treatment efficiency and targeting.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The leachate concentrate is pretreated and chloride ions are separated by the coarse filter membrane and ED filter membrane in the diversion box, reducing environmental pollution and resource waste; 2. By using a lime slurry preparation unit to treat high chloride ion solutions and an incineration unit to treat high COD solutions, effective treatment of leachate membrane concentrate is achieved; 3. It solves the problems of resource waste and increased environmental risks caused by the existing methods of directly transporting leachate to landfill or simply incinerating leachate membrane concentrate. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application.

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

[0029] Figure 3 This is a schematic diagram of the stirring device.

[0030] Figure 4 This is a cross-sectional view of the stirring device.

[0031] Explanation of reference numerals in the attached drawings: 1. Diversion box; 11. First chamber; 111. Pretreatment chamber; 112. First desalination chamber; 113. First concentration chamber; 114. First inlet; 115. First outlet; 116. Second outlet; 12. Second chamber; 121. Third outlet; 122. Second desalination chamber; 123. Second concentration chamber; 13. Coarse filter membrane; 14. ED membrane; 15. Nanofiltration membrane; 2. Incineration mechanism; 21. High-concentration COD solution storage tank; 22. Combustion furnace; 23. 3. Exhaust gas treatment unit; 4. Lime slurry preparation mechanism; 5. Stirring device; 6. Support; 7. Stirring motor; 8. First pulley; 9. Second pulley; 10. Limiting rack; 11. Stirring roller; 12. First stirring blade; 13. U-shaped plate; 14. Limiting sleeve; 15. Second stirring blade; 16. First bevel gear; 27. Second bevel gear; 28. Third bevel gear; 39. Protective shell; 40. Chloride ion sensor; 41. First solenoid valve; 52. COD sensor; 63. Second solenoid valve. Detailed Implementation

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] This application discloses a percolate membrane concentrate recycling treatment device.

[0034] like Figure 1 As shown, the leachate membrane concentrate recycling device includes a diversion tank 1, an incineration mechanism 2, and a lime slurry preparation mechanism 3. The diversion tank 1, incineration mechanism 2, and lime slurry preparation mechanism 3 work together to effectively divert and treat the leachate membrane concentrate, specifically addressing the high chloride ion solution and high COD solution separately. This avoids resource waste and environmental risks caused by direct landfilling or incineration, and improves resource utilization efficiency.

[0035] like Figure 2As shown, the diversion box 1 includes a first box 11 and a second box 12. The first box 11 contains a coarse filter membrane 13 and an ED membrane 14. The coarse filter membrane 13 generally has a porous structure and can be made of ceramic or polymer materials, etc., to perform preliminary screening of suspended solids in the leachate membrane concentrate. The coarse filter membrane 13 and the ED membrane 14 divide the interior of the first box 11 into a pretreatment chamber 111, a first desalination chamber 112, and a first concentration chamber 113. The first inlet 114 on the upper side wall of the pretreatment chamber 111 is used for raw material injection. This inlet can be connected to an external leachate membrane concentrate delivery pipeline via a flange connection or other means. The first outlet 115 is located at the bottom of the first desalination chamber 112 and is connected to the second box 12. The connection method can be welding or a sealed pipe. The first outlet 115 can be made of corrosion-resistant plastic or metal pipe. The second outlet 116 at the bottom of the first concentration chamber 113 is connected to the lime slurry preparation mechanism 3, and is also connected by a suitable pipe.

[0036] The second chamber 12 is equipped with a nanofiltration membrane 15, which further separates the liquid entering the second chamber 12. The nanofiltration membrane 15 can be made of materials such as polyamide membrane, and it divides the interior of the second chamber 12 into a second desalination chamber 122 and a second concentration chamber 123. The first outlet 115 is connected to the side wall of the chamber above the second concentration chamber 123, so that the liquid flowing out of the first outlet 115 can smoothly enter the second concentration chamber 123. A drain outlet is provided at the bottom of the second desalination chamber 122, from which the treated, cleaner water can be discharged. A valve can be installed at the drain outlet for easy control of drainage. The third outlet 121 at the bottom of the second concentration 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. Both the chloride ion sensor 6 and the COD sensor 8 are 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 tank reaches a certain threshold.

[0038] The incineration unit 2 is mainly used for treating high-concentration COD solutions. It includes a high-concentration COD solution storage tank 21, a combustion furnace 22, and a tail gas treatment unit 23. The high-concentration COD solution storage tank 21 can be made of corrosion-resistant carbon steel, etc., and its upper end is connected to the second outlet 116 to store the high-chlorine solution from the first concentration chamber 113. A drain port is provided at the bottom of the high-concentration COD solution storage tank 21, which can be controlled by a metal ball valve. An atomizer is installed inside the combustion furnace 22, located at the top of the furnace. This atomizer can be a pressure atomizer or similar type. The drain port is connected to the atomizer, which can be connected via a high-pressure hose. The combustion furnace 22 is equipped with a burner, which provides an ignition source for solution combustion. This burner can be a gas burner or an oil burner, etc. The exhaust gas treatment unit 23 is connected to the combustion furnace 22 through a pipeline and can treat the exhaust gas generated after combustion. The pipeline here should also be made of corrosion-resistant material. The exhaust gas treatment unit 23 may include purification equipment such as desulfurization tower and denitrification equipment.

[0039] The lime slurry preparation unit 3 is used to process high chloride ion solutions. It includes a mixing tank and a stirring device 4. The mixing tank is made of stainless steel or other materials. One side of its upper end is connected to a third outlet 121 to receive high concentrations of lime. The other side of its upper end is equipped with a quantitative feeding mechanism for adding lime powder. The quantitative feeding mechanism can be a screw feeder or similar structure, which can precisely control the amount of lime powder added. The stirring device 4 is installed inside the mixing tank to mix the high chloride solution and lime powder. A bucket-shaped discharge port is provided at the bottom of the mixing tank for discharging the material.

[0040] like Figure 3 and Figure 4 As shown, the stirring device 4 includes components such as a support 41, a stirring motor 42, a first pulley 43 and a second pulley 44, a limiting rack 45, and a stirring roller 46. As part of the lime slurry preparation mechanism 3, the stirring device 4 plays a crucial role in mixing the high-chlorine solution and lime powder. Its unique design enables more thorough mixing and improves the treatment effect.

[0041] Specifically, the support 41 is installed on the top of the mixing tank. It can be made of welded profiles and serves to support 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 and throughput of the mixing tank, and a three-phase asynchronous motor can be used. The first pulley 43 is installed on the output shaft of the stirring motor 42 and rotates with the motor output shaft. The second pulley 44 is rotatably connected to the support, and a limit rod is rotatably connected to the center of the second pulley 44. 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 description 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 limit gear is coaxially installed on the stirring rod 46, and a U-shaped plate 47 is rotatably connected to it. The limit gear is located 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, and the side wall of the limiting rack 45 without teeth can fit against the side wall of the U-shaped plate 47. Thus, after a series of transmissions such as the first pulley 43 driving the second pulley 44 to rotate, the stirring roller 46 can also rotate. The first stirring blade 461 on the stirring roller 46 stirs the liquid and lime powder in the mixing tank during rotation. The first stirring blade 461 can be in the form of a paddle, turbine, etc. Multiple first stirring blades 461 are evenly installed on the circumference of the stirring roller 46, which can more thoroughly stir the mixture.

[0042] It also includes a limiting sleeve 48, a first bevel gear 49, a second bevel gear 50 and a third bevel gear 51, and a protective shell 52. The coordinated operation of these components enhances the mixing effect and range.

[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 rotation. The first bevel gear 49 is mounted on the stirring rod 46 and 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 profile design must meet the transmission requirements. There are two sets of second bevel gears 50, which are symmetrically mounted 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. There are also several second stirring blades 481, which are evenly installed on the circumferential part of the limiting sleeve 48. The protective shell 52 has a protective cavity inside. 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 in the protective cavity. The lower end of the protective shell 52 is rotatably connected to the side wall of the limiting sleeve 48. The protective shell 52 can prevent gears and other components from being interfered with and corroded by external impurities, thus extending the service life of the components.

[0044] The implementation principle of the leachate membrane concentrate recycling treatment device in this application embodiment is as follows: Through the synergistic action of the diversion box 1, the incineration mechanism 2, and the lime slurry preparation mechanism 3, the leachate membrane concentrate can be effectively diverted and treated. Compared with existing methods of direct landfilling or simple incineration, it avoids resource waste because it can recover some substances from the leachate membrane concentrate. Simultaneously, it provides targeted treatment for high-chlorine solutions and high-concentration COD solutions, reducing the pollution of harmful gases and substances to the environment, improving the overall efficiency and quality of landfill leachate treatment, and promoting the recycling of resources and the sustainable development of the environmental protection industry.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A percolate membrane concentrate recycling treatment device, characterized in that: The system includes a diversion box (1), an incineration mechanism (2), and a lime slurry preparation mechanism (3). The diversion box (1) includes a first box (11) and a second box (12). The first box (11) is equipped with a coarse filter membrane (13) for initial screening of suspended solids and an ED filter membrane for chloride ion separation. The coarse filter membrane (13) and the ED filter membrane divide the interior of the first box (11) into a pretreatment chamber (111), a first desalination chamber (112), and a first concentration chamber (113). The upper side wall of the pretreatment chamber (111) is equipped with a first inlet (114) for injecting raw slurry. The bottom of the first desalination chamber (112) is equipped with a first outlet (115) which is connected to the second box (12). The bottom of the first concentration chamber (113) is... A second outlet (116) is provided, which is connected to a lime slurry preparation mechanism (3). The lime slurry preparation mechanism (3) is used to treat high chloride ion solutions. A nanofiltration membrane (15) is provided inside the second box (12). The nanofiltration membrane (15) divides the interior of the second box (12) into a second desalination chamber (122) and a second concentration chamber (123). The first outlet (115) is connected to the side wall of the box above the second concentration chamber (123). A drain outlet is provided at the bottom of the second desalination chamber (122). A third outlet (121) is provided at the bottom of the second concentration chamber (123). The third outlet (121) is connected to an incineration mechanism (2). The incineration mechanism (2) is used to treat high concentration COD solutions. It also includes a chloride ion sensor (6) and a first solenoid valve (7), the first solenoid valve (7) being installed at the first liquid outlet (115), and the chloride ion sensor (6) being installed in the first desalination chamber (112); It also includes a COD sensor (8) and a second solenoid valve (9), the second solenoid valve (9) being installed at the third outlet (121), and the COD sensor (8) being installed in the second concentration chamber (123).

2. The leachate membrane concentrate recycling treatment device according to claim 1, characterized in that: The incineration mechanism (2) includes a high-concentration COD solution storage tank (21), a combustion furnace (22), and a tail gas treatment unit (23). The upper end of the high-concentration COD solution storage tank (21) is connected to a third liquid outlet (121). A drain port is provided at the bottom of the high-concentration COD solution storage tank (21). An atomizer is provided inside the combustion furnace (22), and the atomizer is installed at the top of the combustion furnace (22). The drain port is connected to the atomizer. A burner is installed in the combustion furnace (22). The tail gas treatment unit (23) is connected to the combustion furnace (22) through a pipe and is used to treat the tail gas generated after combustion.

3. The leachate membrane concentrate recycling treatment device according to claim 1, characterized in that: The lime slurry preparation mechanism (3) includes a mixing tank and a stirring device (4). The upper end of the mixing tank is connected to the second liquid outlet (116) on one side, and a metering feeder for adding lime powder is installed on the other side. The stirring device (4) is installed in the mixing tank and is used to mix the high-chlorine solution and lime powder.

4. The leachate membrane concentrate recycling treatment device according to claim 3, characterized in that: The stirring device (4) includes a support (41), a stirring motor (42), a first pulley (43) and a second pulley (44), a limiting rack (45), and a stirring rod (46). The support (41) is installed on the top of the mixing tank, the stirring motor (42) is installed on the support (41), the first pulley (43) is installed on the output shaft of the stirring motor (42), the second pulley (44) is rotatably connected to the support, and a limiting rod is rotatably connected to the axial part of the second pulley (44). The end of the limiting rod away from the second pulley (44) is connected to the limiting rack. 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 a U-shaped plate (47) is rotatably connected to the stirring rod (46). The limiting gear is located 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 side wall of the limiting rack (45) without teeth can fit against the side wall of the U-shaped plate (47). A first stirring blade (461) is installed on the stirring rod (46).

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

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

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

8. The leachate membrane concentrate recycling treatment device according to claim 6, characterized in that: It also includes a protective shell (52), which has a protective cavity inside. 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 arranged in the protective cavity. The lower end of the protective shell (52) is rotatably connected to the side wall of the limiting sleeve (48).

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