A kind of domestic waste landfill leachate zero discharge treatment device and method thereof

Abstract

The application discloses a kind of domestic waste landfill leachate zero discharge treatment device and method thereof, it is related to leachate processing technical field, including pedestal, the top of the pedestal is fixedly installed with support frame, the inner wall of support frame near top is fixedly installed with support sleeve, the inner wall of support sleeve is fixedly installed with evaporation tank, the top of the pedestal is provided with liquid heating mechanism.The application is heated by the design of the whole liquid heating mechanism, circulating pump, can make heat conducting oil from heat conducting oil tank, conveying pipe, heating sleeve and the inner cavity of reflux pipe circulation, control the work of electric heating wire at the same time, heat conducting oil can be heated, that is, the function of heating the concentrated liquid in the evaporation tank is realized, and the temperature of heat conducting oil in the inner cavity of heat conducting oil tank is detected by the design of temperature sensor, and the electric heating wire is controlled to stop working when the temperature is greater than the preset value, to avoid the problem that continuous work can cause large power consumption.

Description

Technical Field

[0001] This invention relates to the field of leachate treatment technology, specifically to a zero-discharge treatment device and method for leachate from municipal solid waste landfills. Background Technology

[0002] Landfill leachate refers to the pollutant-rich liquid formed during the landfill process by the mixture of precipitation, groundwater, and the biodegradation of the waste itself. It contains high concentrations of organic matter, heavy metals, ammonia nitrogen, salts, and pathogenic microorganisms, and is characterized by its complex composition, high toxicity, and difficulty in treatment. Direct discharge without proper treatment will severely pollute the soil, groundwater, and surrounding ecosystem, threatening human health. Therefore, strict control is necessary through a combination of pretreatment, biological treatment, and advanced treatment processes.

[0003] Zero-discharge leachate refers to the comprehensive and harmless treatment of leachate generated from landfills, incinerators, and other waste treatment facilities through integrated treatment technologies. This involves water recovery and reuse, conversion of residual pollutants into solid products (such as crystalline salts and sludge) for safe disposal, ultimately achieving zero discharge of liquid pollutants into the external environment. This technology aims to completely eliminate the pollution risks of leachate to soil, groundwater, and other ecosystems, while complying with the principles of a circular economy and environmental regulations.

[0004] After reverse osmosis treatment, leachate produces concentrate, which needs to be evaporated and crystallized to convert residual pollutants into solid products and dispose of them safely, thus achieving zero discharge. Existing evaporation and crystallization devices mostly use steam to heat the concentrate and evaporate it. Steam heating is unstable and the heating temperature cannot be accurately controlled, resulting in low energy efficiency. The unstable temperature can also affect the service life of the equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a zero-discharge treatment device and method for leachate from municipal solid waste landfills, in order to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A zero-discharge treatment device for leachate from a municipal solid waste landfill includes a base, a support frame fixedly installed on the top of the base, a support sleeve fixedly installed on the inner wall of the support frame near the top, an evaporator fixedly installed on the inner wall of the support sleeve, a liquid heating mechanism on the top of the base, a liquid stirring mechanism on the top of the support frame, and a condensation mechanism on the top of the base.

[0008] The liquid heating mechanism includes a support leg and a heat transfer oil tank. The support leg is fixedly installed on the top of the base, and a heating sleeve is fixedly installed on the top of the support leg. The heating sleeve has a vacuum chamber inside, and a copper extension tank is fixedly installed on the inner wall of the heating sleeve. The copper extension tank is fixedly connected to the bottom of the evaporator. A reflux pipe is fixedly connected to the top of the heating sleeve. The heat transfer oil tank is fixedly installed on the top of the base, and the end of the reflux pipe away from the heating sleeve is fixedly connected to the top of the heat transfer oil tank. A circulation pump is fixedly installed at the bottom of the heat transfer oil tank. The input end of the circulation pump is fixedly connected to the bottom of the heat transfer oil tank, and the output end of the circulation pump is fixedly connected to a delivery pipe. The end of the delivery pipe away from the circulation pump is fixedly connected to the bottom of the heating sleeve.

[0009] Preferably, an inner partition is fixedly installed on the inner wall of the heat transfer oil tank, a controller is fixedly installed on the top of the heat transfer oil tank, a mesh plate is fixedly installed on the inner wall of the inner partition, and a temperature sensor is fixedly installed on the top of the mesh plate.

[0010] Preferably, the top of the inner partition is provided with a through groove, a copper sleeve is fixedly installed on the inner wall of the through groove, an electric heating wire located in the inner cavity of the copper sleeve is fixedly installed on the inner wall of the through groove, and heat exchange fins are fixedly connected to the outer wall of the copper sleeve.

[0011] Preferably, the liquid stirring mechanism includes a support frame and a raised seat. The support frame is fixedly installed on the top of the support frame, and the raised seat is fixedly installed on the top of the support frame. A vertical rod is fixedly installed on the top of the raised seat, and a lead screw is rotatably connected to the top of the raised seat. The top of the vertical rod is fixedly connected to the bottom of the support frame, and the top of the lead screw is rotatably connected to the bottom of the support frame. A servo motor is fixedly installed on the top of the support frame, and the output shaft of the servo motor is fixedly connected to the top of the lead screw.

[0012] Preferably, a sliding seat is slidably connected to the outer wall of the vertical rod and the lead screw, a top cover is fixedly installed on the right side of the sliding seat, the top cover is movably inserted into the top of the evaporator, a branch pipe is detachably connected to the top of the top cover, a central pipe is fixedly connected to the end of the branch pipe away from the top cover, and a transfer pipe is fixedly connected to the back of the central pipe.

[0013] Preferably, a drive motor is fixedly installed on the top of the top cover, a rotating seat is rotatably connected to the bottom of the top cover, the output shaft of the drive motor is fixedly connected to the top of the rotating seat, a rotating shaft is detachably connected to the bottom of the rotating seat, and a stirring paddle is fixedly installed on the outer wall of the rotating shaft.

[0014] Preferably, the condensation mechanism includes a condensation treatment chamber, which is fixedly installed on the top of the base. A solenoid valve is fixedly connected to the top of the condensation treatment chamber. The end of the transfer pipe away from the central pipe is fixedly connected to the top of the solenoid valve. An inlet valve pipe and an outlet valve pipe are fixedly connected to the right side of the condensation treatment chamber. A central discharge hood is fixedly connected to the bottom of the condensation treatment chamber.

[0015] Preferably, a square partition 1 is fixedly installed on the inner wall of the condensation treatment chamber, and a square partition 2 is fixedly installed on the inner wall of the condensation treatment chamber. A connecting pipe is fixedly connected to the bottom of the square partition 1, and a heat exchange copper pipe is fixedly connected to the bottom of the connecting pipe. The heat exchange copper pipe is fixedly connected to the top of the square partition 2.

[0016] Preferably, an inner support ring is fixedly installed on the inner wall of the connecting pipe, a connecting rod is fixedly connected to the inner wall of the inner support ring, an inner ring member is fixedly connected to the end of the connecting rod away from the inner wall of the inner support ring, an inner rotating block is rotatably connected to the inner wall of the inner ring member, an upper shaft member is fixedly connected to the top of the inner rotating block, a drive blade is fixedly installed on the outer wall of the upper shaft member, a lower shaft member is fixedly connected to the bottom of the inner rotating block, an inclined rod is fixedly connected to the outer wall of the lower shaft member, a scraper is fixedly connected to the end of the inclined rod away from the lower shaft member, and the side of the scraper is movably connected to the inner wall of the heat exchange copper tube.

[0017] This invention provides the following technical solution: a method for using a zero-discharge treatment device for leachate from municipal solid waste landfills, comprising the following steps:

[0018] S1. First, control the servo motor to work, drive the sliding seat to move upward, and cause the top cover to move upward from the top of the evaporator. Then, the concentrated liquid to be processed can be added into the inner cavity of the evaporator. Then, control the servo motor to work again, drive the top cover to move downward and reset, thus completing the addition of concentrated liquid.

[0019] S2. Control the operation of the circulating pump to circulate the heat transfer oil from the heat transfer oil tank, delivery pipe, heating sleeve and return pipe. At the same time, control the operation of the heating wire to heat the heat transfer oil, thereby heating the concentrate inside the evaporator and promoting the evaporation of the concentrate.

[0020] S3. After evaporation is complete, control the servo motor to move the top cover upwards, which will allow the solid products remaining in the evaporator to be extracted for further processing.

[0021] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows:

[0022] 1. This invention provides a zero-discharge treatment device and method for leachate from municipal solid waste landfills. Through the overall design of the liquid heating mechanism, when the circulation pump is working, the heat transfer oil can circulate from the inner cavity of the heat transfer oil tank, the delivery pipe, the heating sleeve, and the return pipe. At the same time, the heating wire is controlled to work, which can heat the heat transfer oil, thereby achieving the function of heating the concentrated liquid inside the evaporator. Furthermore, through the design of the temperature sensor, the temperature of the heat transfer oil returning to the inner cavity of the heat transfer oil tank can be detected, and when the temperature exceeds the preset value, the heating wire is controlled to stop working, avoiding the problem of excessive power consumption due to continuous operation. This achieves a more accurate control of the evaporation temperature, increases energy utilization efficiency, ensures the stability of the device, and increases the service life of the device.

[0023] 2. This invention provides a zero-discharge treatment device and method for leachate from municipal solid waste landfills. Through the overall design of the condensation mechanism, the evaporated gas can be cooled and condensed. The flow force of the evaporated gas can also be used to drive the drive blades and upper shaft to rotate, thereby causing the inner rotating block to rotate on the inner wall of the inner ring. Subsequently, the lower shaft and the inclined rod drive the scraper to rotate on the inner wall of the heat exchange copper tube, realizing the function of automatically scraping and cleaning the inner wall of the heat exchange copper tube to ensure the heat exchange rate of the heat exchange copper tube. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a cross-sectional structural diagram of the heating sleeve of the present invention;

[0026] Figure 3 This is a cross-sectional structural diagram of the heat transfer oil tank of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the inner partition of the present invention;

[0028] Figure 5 This is a schematic diagram of the supporting frame of the present invention;

[0029] Figure 6 This is a schematic diagram of the top cover of the present invention;

[0030] Figure 7 This is a cross-sectional structural diagram of the condensation chamber of the present invention;

[0031] Figure 8 This is a cross-sectional view of the heat exchange copper tube of the present invention.

[0032] Figure 9 for Figure 8 A magnified structural diagram of point A in the middle.

[0033] In the diagram: 1. Base; 11. Support frame; 12. Support sleeve; 13. Evaporator; 2. Liquid heating mechanism; 21. Support leg; 22. Heating sleeve; 23. Vacuum chamber; 24. Copper extension tank; 25. Return pipe; 26. Heat transfer oil tank; 27. Circulation pump; 28. Delivery pipe; 29. ​​Inner baffle; 291. Controller; 292. Mesh plate; 293. Temperature sensor; 294. Through groove; 295. Copper sleeve; 296. Heating wire; 297. Heat exchange fins; 3. Liquid stirring mechanism; 31. Support frame; 32. Elevation seat; 33. Vertical rod; 34. Lead screw; 35. Servo motor; 36. Slide 37. Moving base; 371. Top cover; 372. Drive motor; 373. Rotating shaft; 374. Stirring paddle; 375. Branch pipe; 376. Centralized pipe fitting; 3777. Transfer pipe; 4. Condensation mechanism; 41. Condensation treatment chamber; 42. Solenoid valve; 43. Inlet valve pipe; 44. Outlet valve pipe; 45. Centralized discharge hood; 46. Square partition one; 47. Square partition two; 48. Connecting pipe; 481. Inner support ring; 482. Connecting rod; 483. Inner ring component; 484. Inner rotating block; 485. Upper shaft component; 486. Drive blade; 487. Lower shaft component; 488. Diagonal bar; 489. Scraper; 49. Heat exchange copper tube. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to embodiments:

[0035] Example 1

[0036] like Figures 1-9As shown, this invention provides a zero-discharge treatment device for leachate from municipal solid waste landfills, comprising a base 1, a support frame 11 fixedly installed on the top of the base 1, a support sleeve 12 fixedly installed on the inner wall of the support frame 11 near the top, an evaporator 13 fixedly installed on the inner wall of the support sleeve 12, a liquid heating mechanism 2 provided on the top of the base 1, a liquid stirring mechanism 3 provided on the top of the support frame 11, and a condensation mechanism 4 provided on the top of the base 1. The liquid heating mechanism 2 includes a support leg 21 and a heat transfer oil tank 26. The support leg 21 is fixedly installed on the top of the base 1, and a heating sleeve 22 is fixedly installed on the top of the support leg 21. A vacuum chamber 23 is provided inside the heating sleeve 22, and a copper extension tank 24 is fixedly installed on the inner wall of the heating sleeve 22. The copper extension tank 24 is fixedly connected to the bottom of the evaporator 13, and a return pipe 25 is fixedly connected to the top of the heating sleeve 22. The 6 is fixedly installed on the top of the base 1. The end of the return pipe 25 away from the heating sleeve 22 is fixedly connected to the top of the heat transfer oil tank 26. The bottom of the heat transfer oil tank 26 is fixedly installed with a circulation pump 27. The input end of the circulation pump 27 is fixedly connected to the bottom of the heat transfer oil tank 26. The output end of the circulation pump 27 is fixedly connected to a delivery pipe 28. The end of the delivery pipe 28 away from the circulation pump 27 is fixedly connected to the bottom of the heating sleeve 22. After the concentrate is added into the evaporator 13, the circulation pump 27 is controlled to work, so that the heat transfer oil circulates from the heat transfer oil tank 26, the delivery pipe 28, the heating sleeve 22 and the return pipe 25. At the same time, the heating wire 296 is controlled to work, which can heat the heat transfer oil. The heat transfer oil will exchange heat with the concentrate through the copper extension tank 24, that is, realize the function of heating and evaporating the concentrate. Through the design of the vacuum chamber 23, the natural heat loss rate of the heat transfer oil can be reduced, and the heat energy consumption can be reduced.

[0037] Furthermore, such as Figure 3 , Figure 4As shown, an inner partition 29 is fixedly installed on the inner wall of the heat transfer oil tank 26, a controller 291 is fixedly installed on the top of the heat transfer oil tank 26, a mesh plate 292 is fixedly installed on the inner wall of the inner partition 29, a temperature sensor 293 is fixedly installed on the top of the mesh plate 292, a through groove 294 is opened on the top of the inner partition 29, a copper sleeve 295 is fixedly installed on the inner wall of the through groove 294, an electric heating wire 296 located in the inner cavity of the copper sleeve 295 is fixedly installed on the inner wall of the through groove 294, and a heat exchange fin 297 is fixedly connected to the outer wall of the copper sleeve 295. The temperature sensor 293 is designed to detect the temperature of the heat transfer oil flowing back into the inner cavity of the heat transfer oil tank 26 and feed the temperature data back to the controller 291. When the temperature exceeds a preset value, the controller 291 will control the heating wire 296 to stop working; conversely, it will control the heating wire 296 to work, thus achieving a more accurate control of the evaporation temperature and increasing energy utilization efficiency. It is worth noting that the temperature sensor 293 in this solution is a commercially available device that can be purchased by those skilled in the art, and its structure has not been modified in this paper. Therefore, those skilled in the art are familiar with its working principle based on their professional knowledge and can apply it proficiently. This article will not elaborate further on this. Furthermore, the controller 291, as a conventional device in the art, is used to receive electrical signals from the temperature sensor 293, a technology well-known to those skilled in the art. This article will not elaborate further on this either. This solution aims to protect the physical structure, not the circuitry or software control. The proposed processing circuit is merely a supplementary explanation of the feasibility and authenticity of this invention. This invention does not seek protection for the algorithm and circuitry. It is worth emphasizing that although this solution does not elaborate on the electronic control program, those skilled in the art can be familiar with and apply it based on their professional knowledge. Through the design of the mesh plate 292, some circulating heat transfer oil can flow through it, increasing the accuracy of temperature measurement by the temperature sensor 293. The copper sleeve 295 is used to protect the heating wire 296, and the heat emitted by the heating wire 296 can be transferred to the heat transfer oil through the copper sleeve 295 and the heat exchange fins 297.

[0038] Furthermore, such as Figure 5 , Figure 6As shown, the liquid stirring mechanism 3 includes a support frame 31 and a raised seat 32. The support frame 31 is fixedly installed on the top of the support frame 11, and the raised seat 32 is fixedly installed on the top of the support frame 11. A vertical rod 33 is fixedly installed on the top of the raised seat 32, and a lead screw 34 is rotatably connected to the top of the raised seat 32. The top of the vertical rod 33 is fixedly connected to the bottom of the support frame 31, and the top of the lead screw 34 is rotatably connected to the bottom of the support frame 31. A servo motor 35 is fixedly installed on the top of the support frame 31, and the output shaft of the servo motor 35 is fixedly connected to the top of the lead screw 34. A sliding seat 36 is slidably connected to the outer wall of the vertical rod 33 and the lead screw 34. A top cover 37 is fixedly installed on the right side of the sliding seat 36. The top cover 37 is movably inserted into the top of the evaporator 13. A branch pipe 374 is detachably connected to the top of the top cover 37, and the end of the branch pipe 374 away from the top cover 37 is fixedly connected to... The central fitting 375 has a transfer pipe 376 fixedly connected to its back. If the concentrate needs to be added, first control the servo motor 35 to drive the lead screw 34 to rotate, which in turn drives the sliding seat 36 to move upward on the outer wall of the vertical rod 33, causing the top cover 37 to move upward from the top of the evaporator 13. Then the concentrate to be processed can be added into the inner cavity of the evaporator 13. Then control the servo motor 35 again to drive the top cover 37 to move downward and reset, thus completing the addition of the concentrate. When the top cover 37 is adjusted to the top, the solid product remaining in the inner cavity of the evaporator 13 can be extracted for subsequent processing. At the same time, the components originally in the inner cavity of the evaporator 13 can be maintained. When the concentrate inside the evaporator 13 evaporates, the generated steam will be output through the inner cavities of the branch pipe 374, the central fitting 375, and the transfer pipe 376.

[0039] Furthermore, such as Figure 6 As shown, a drive motor 371 is fixedly installed on the top of the top cover 37, and a rotating seat is rotatably connected to the bottom of the top cover 37. The output shaft of the drive motor 371 is fixedly connected to the top of the rotating seat, and a rotating shaft 372 is detachably connected to the bottom of the rotating seat. A stirring paddle 373 is fixedly installed on the outer wall of the rotating shaft 372. When the concentrate inside the evaporator 13 is evaporating, the drive motor 371 can be controlled to work, driving the rotating shaft 372 and the stirring paddle 373 to rotate. The stirring paddle 373 can stir the concentrate, improve the uniformity of heating, and thus increase the evaporation effect. The rotating shaft 372 is connected to the rotating seat below the top cover 37 by bolts and flanges. The user can disassemble and replace the damaged rotating shaft 372 as a whole.

[0040] Furthermore, such as Figure 7As shown, the condensing mechanism 4 includes a condensation chamber 41, which is fixedly installed on the top of the base 1. A solenoid valve 42 is fixedly connected to the top of the condensation chamber 41. One end of the transfer pipe 376 away from the central pipe 375 is fixedly connected to the top of the solenoid valve 42. An inlet valve pipe 43 and an outlet valve pipe 44 are fixedly connected to the right side of the condensation chamber 41. A central outlet hood 45 is fixedly connected to the bottom of the condensation chamber 41. A square partition 1 46 and a square partition 2 47 are fixedly installed on the inner wall of the condensation chamber 41. A connecting pipe 48 is fixedly connected to the bottom of the square partition 1 46. A heat exchange copper pipe 49 is fixedly connected to the bottom of the connecting pipe 48. The heat exchange copper pipe 49 is fixedly connected to the top of the square partition 2 47. Evaporator 1 When the concentrated liquid inside 3 evaporates, the generated steam is output through the inner cavity of the branch pipe 374, the central fitting 375 and the transfer pipe 376, and then enters the inner cavity of the condensation treatment chamber 41 through the solenoid valve 42. It then flows through the inner cavity of the connecting pipe 48 and the heat exchange copper pipe 49. The inlet valve pipe 43 is connected to the cold water source in advance, and the outlet valve pipe 44 is connected to the hot water recovery end. By controlling the opening of the inlet valve pipe 43, cold water can be delivered between the square partition 1 46 and the square partition 2 47. The cold water will exchange heat with the steam through the heat exchange copper pipe 49, causing the steam to condense into liquid. Then it will be output through the central outlet hood 45. The heat will heat the cold water. Subsequently, by controlling the opening of the outlet valve pipe 44, hot water can be output, realizing the function of heat recovery and increasing energy utilization efficiency.

[0041] Furthermore, such as Figure 8 , Figure 9As shown, an inner support ring 481 is fixedly installed on the inner wall of the connecting pipe 48. A connecting rod 482 is fixedly connected to the inner wall of the inner support ring 481. An inner ring member 483 is fixedly connected to the end of the connecting rod 482 away from the inner wall of the inner support ring 481. An inner rotating block 484 is rotatably connected to the inner wall of the inner ring member 483. An upper shaft member 485 is fixedly connected to the top of the inner rotating block 484. A drive blade 486 is fixedly installed on the outer wall of the upper shaft member 485. A lower shaft member 487 is fixedly connected to the bottom of the inner rotating block 484. A diagonal rod 488 is fixedly connected to the outer wall of the lower shaft member 487. A scraper 489 is fixedly connected to the end of the diagonal rod 488 away from the lower shaft member 487. The side of the scraper 489 is movably connected to the inner wall of the heat exchange copper pipe 49. The diagonal rod 488 has... The elastic alloy, in its initial state, allows the scraper 489 to adhere to the outer wall of the heat exchange copper tube 49 due to the elastic force of the inclined rod 488. If automatic cleaning of the inner wall of the heat exchange copper tube 49 is required, the solenoid valve 42 is first closed to accumulate a certain amount of steam. Then, the solenoid valve 42 is opened, and high-pressure steam flows into the inner cavity of the connecting pipe 48 and the heat exchange copper tube 49. The steam flow force can drive the drive blade 486 and the upper shaft 485 to rotate, thereby causing the inner rotating block 484 to rotate on the inner wall of the inner ring 483. Subsequently, the scraper 489 is driven to rotate on the inner wall of the heat exchange copper tube 49 through the transmission of the lower shaft 487 and the inclined rod 488, thereby realizing the function of automatically scraping and cleaning the inner wall of the heat exchange copper tube 49 to ensure the heat exchange rate of the heat exchange copper tube 49.

[0042] Example 2

[0043] like Figures 1-9 As shown, the present invention provides a technical solution: a method for using a zero-discharge treatment device for leachate from municipal solid waste landfills, comprising the following steps:

[0044] S1. First, control the servo motor 35 to work, drive the sliding seat 36 to move upward, and cause the top cover 37 to move upward from the top of the evaporator 13. Then, the concentrated liquid to be processed can be added into the inner cavity of the evaporator 13. Then, control the servo motor 35 to work again, drive the top cover 37 to move downward and reset, thus completing the addition of concentrated liquid.

[0045] S2. Control the operation of the circulating pump 27 to make the heat transfer oil circulate from the inner cavity of the heat transfer oil tank 26, the delivery pipe 28, the heating sleeve 22 and the return pipe 25. At the same time, control the operation of the heating wire 296 to heat the heat transfer oil, thereby realizing the function of heating the concentrate inside the evaporator 13, which can promote the evaporation of the concentrate.

[0046] S3. After evaporation is completed, control the servo motor 35 to work, drive the top cover 37 to move upward as a whole, and then extract the solid product remaining in the inner cavity of the evaporator 13 for subsequent processing.

[0047] It should be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" 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 mechanical 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 components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0048] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A zero-discharge treatment device for leachate from municipal solid waste landfills, characterized in that: The system includes a base, a support frame fixedly installed on the top of the base, a support sleeve fixedly installed on the inner wall of the support frame near the top, an evaporator fixedly installed on the inner wall of the support sleeve, a liquid heating mechanism on the top of the base, a liquid stirring mechanism on the top of the support frame, and a condensation mechanism on the top of the base. The liquid heating mechanism includes a support leg and a heat transfer oil tank. The support leg is fixedly installed on the top of the base, and a heating sleeve is fixedly installed on the top of the support leg. The heating sleeve has a vacuum chamber inside, and a copper extension tank is fixedly installed on the inner wall of the heating sleeve. The copper extension tank is fixedly connected to the bottom of the evaporator. A reflux pipe is fixedly connected to the top of the heating sleeve. The heat transfer oil tank is fixedly installed on the top of the base, and the end of the reflux pipe away from the heating sleeve is fixedly connected to the top of the heat transfer oil tank. A circulation pump is fixedly installed at the bottom of the heat transfer oil tank. The input end of the circulation pump is fixedly connected to the bottom of the heat transfer oil tank, and the output end of the circulation pump is fixedly connected to a delivery pipe. The end of the delivery pipe away from the circulation pump is fixedly connected to the bottom of the heating sleeve. The liquid stirring mechanism includes a support frame and a raised base. The support frame is fixedly installed on the top of the support frame, and the raised base is fixedly installed on the top of the support frame. A vertical rod is fixedly installed on the top of the raised base, and a lead screw is rotatably connected to the top of the raised base. The top of the vertical rod is fixedly connected to the bottom of the support frame, and the top of the lead screw is rotatably connected to the bottom of the support frame. A servo motor is fixedly installed on the top of the support frame, and the output shaft of the servo motor is fixedly connected to the top of the lead screw. A sliding seat is slidably connected to the outer wall of the vertical rod and the lead screw. A top cover is fixedly installed on the right side of the sliding seat. The top cover is movably inserted into the top of the evaporator. A branch pipe is detachably connected to the top of the top cover. A central pipe is fixedly connected to the end of the branch pipe away from the top cover. A transfer pipe is fixedly connected to the back of the central pipe. A drive motor is fixedly installed on the top of the top cover, and a rotating seat is rotatably connected to the bottom of the top cover. The output shaft of the drive motor is fixedly connected to the top of the rotating seat, and a rotating shaft is detachably connected to the bottom of the rotating seat. A stirring paddle is fixedly installed on the outer wall of the rotating shaft. The condensation mechanism includes a condensation treatment chamber, which is fixedly installed on the top of the base. A solenoid valve is fixedly connected to the top of the condensation treatment chamber. The end of the transfer pipe away from the central pipe is fixedly connected to the top of the solenoid valve. An inlet valve pipe and an outlet valve pipe are fixedly connected to the right side of the condensation treatment chamber. A central outlet cover is fixedly connected to the bottom of the condensation treatment chamber. A square partition 1 is fixedly installed on the inner wall of the condensation chamber, and a square partition 2 is fixedly installed on the inner wall of the condensation chamber. A connecting pipe is fixedly connected to the bottom of the square partition 1, and a heat exchange copper pipe is fixedly connected to the bottom of the connecting pipe. The heat exchange copper pipe is fixedly connected to the top of the square partition 2. An inner support ring is fixedly installed on the inner wall of the connecting pipe. A connecting rod is fixedly connected to the inner wall of the inner support ring. An inner ring component is fixedly connected to the end of the connecting rod away from the inner wall of the inner support ring. An inner rotating block is rotatably connected to the inner wall of the inner ring component. An upper shaft component is fixedly connected to the top of the inner rotating block. A drive blade is fixedly installed on the outer wall of the upper shaft component. A lower shaft component is fixedly connected to the bottom of the inner rotating block. An inclined rod is fixedly connected to the outer wall of the lower shaft component. A scraper is fixedly connected to the end of the inclined rod away from the lower shaft component. The side of the scraper is movably connected to the inner wall of the heat exchange copper tube.

2. The zero-discharge treatment device for leachate from municipal solid waste landfills according to claim 1, characterized in that: An inner baffle is fixedly installed on the inner wall of the heat transfer oil tank, a controller is fixedly installed on the top of the heat transfer oil tank, a mesh plate is fixedly installed on the inner wall of the inner baffle, and a temperature sensor is fixedly installed on the top of the mesh plate.

3. The zero-discharge treatment device for leachate from municipal solid waste landfills according to claim 2, characterized in that: The top of the inner partition is provided with a through groove, a copper sleeve is fixedly installed on the inner wall of the through groove, an electric heating wire located in the inner cavity of the copper sleeve is fixedly installed on the inner wall of the through groove, and heat exchange fins are fixedly connected to the outer wall of the copper sleeve.

4. The method of using the zero-discharge treatment device for leachate from municipal solid waste landfills according to any one of claims 1-3, characterized in that: Includes the following steps: S1. First, control the servo motor to work, drive the sliding seat to move upward, and cause the top cover to move upward from the top of the evaporator. Then, add the concentrate to be processed into the inner cavity of the evaporator. Then, control the servo motor to work again, drive the top cover to move downward and reset, thus completing the addition of the concentrate. S2. Control the operation of the circulating pump to circulate the heat transfer oil from the heat transfer oil tank, delivery pipe, heating sleeve and return pipe. At the same time, control the operation of the heating wire to heat the heat transfer oil, thereby heating the concentrate inside the evaporator and causing the concentrate to evaporate. S3. After evaporation is complete, control the servo motor to move the top cover upwards, thereby extracting the solid product remaining in the evaporator cavity for subsequent processing.

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