Domestic waste landfill leachate zero discharge treatment device and method thereof

Abstract

The invention discloses a household garbage landfill leachate zero discharge treatment device and method, and relates to the technical field of leachate treatment.The household garbage landfill leachate zero discharge treatment device comprises a base, a supporting frame is fixedly installed at the top of the base, and a supporting sleeve seat is fixedly installed on the inner wall, close to the top, of the supporting frame; an evaporation tank is fixedly mounted on the inner wall of the supporting sleeve seat, and a liquid heating mechanism is arranged at the top of the base. Through the overall design of the liquid heating mechanism, when a circulating pump works, heat conduction oil can circulate in inner cavities of a heat conduction oil tank, a conveying pipe, a heating sleeve and a backflow pipe, meanwhile, an electric heating wire is controlled to work, the heat conduction oil can be heated, and the function of heating concentrated liquid in the evaporation tank is achieved; the temperature of the heat conduction oil flowing back into the inner cavity of the heat conduction oil tank can be detected, the heating wire is controlled to stop working when the temperature is larger than the preset value, and the problem that electric energy consumption is large due to continuous working is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of leachate treatment, and in particular to a zero-discharge treatment device and method for leachate from a domestic waste landfill. Background Art

[0002] Leachate from municipal solid waste landfills is a pollutant-rich liquid formed during the landfill process by a mixture of precipitation, groundwater, and the biodegradation of the waste itself. It contains high concentrations of harmful components, including organic matter, heavy metals, ammonia nitrogen, salts, and pathogenic microorganisms. It is characterized by its complex composition, high toxicity, and difficulty in treatment. If discharged without proper treatment, it can seriously contaminate soil, groundwater, and the surrounding ecosystem, posing a threat to human health. Therefore, it requires strict control through a combination of pretreatment, biological treatment, and advanced treatment processes.

[0003] Zero leachate discharge (ZLD) involves the complete, harmless treatment of leachate from landfills, incineration plants, and other sites through integrated processing technologies. This involves recycling water, converting residual pollutants into solid products (such as crystallized salts and sludge) for safe disposal, and ultimately achieving zero discharge of liquid pollutants into the environment. This technology aims to completely eliminate the risk of leachate contamination to ecosystems such as soil and groundwater, while complying with the principles of a circular economy and environmental regulations.

[0004] After reverse osmosis treatment, leachate produces concentrated liquid. At this time, the concentrated liquid needs to be evaporated and crystallized, and the residual pollutants are converted into solid products and safely disposed of to achieve zero emissions. Existing evaporation and crystallization devices mostly use steam to heat the concentrated liquid to evaporate it. The steam heating is unstable and the heating temperature cannot be accurately controlled, which leads to low energy utilization efficiency. The unstable temperature can also easily affect the service life of the equipment. Summary of the Invention

[0005] The object of the present invention is to provide a zero-discharge treatment device and method for leachate from a domestic waste landfill, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A zero-discharge treatment device for leachate from a domestic waste landfill comprises a base, a support frame fixedly mounted on the top of the base, a support sleeve fixedly mounted on the inner wall of the support frame near the top, an evaporation tank fixedly mounted on the inner wall of the support sleeve, a liquid heating mechanism provided on the top of the base, a liquid stirring mechanism provided on the top of the support frame, and a condensing mechanism provided on the top of the base;

[0008] The liquid heating mechanism includes a support leg and a heat-conducting oil tank, the support leg is fixedly mounted on the top of the base, a heating sleeve is fixedly mounted on the top of the support leg, a vacuum chamber is provided inside the heating sleeve, a copper extension tank is fixedly mounted on the inner wall of the heating sleeve, the copper extension tank is fixedly connected to the bottom of the evaporation tank, a return pipe is fixedly connected to the top of the heating sleeve, the heat-conducting oil tank is fixedly mounted on the top of the base, the end of the return pipe away from the heating sleeve is fixedly connected to the top of the heat-conducting oil tank, a circulating pump is fixedly mounted on the bottom of the heat-conducting oil tank, the input end of the circulating pump is fixedly connected to the bottom of the heat-conducting oil tank, the output end of the circulating pump is fixedly connected to a delivery pipe, and the end of the delivery pipe away from the circulating pump is fixedly connected to the bottom of the heating sleeve.

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

[0010] Preferably, a through groove is provided on the top of the inner partition, a copper sleeve is fixedly mounted on the inner wall of the through groove, a heating wire located in the inner cavity of the copper sleeve is fixedly mounted on the inner wall of the through groove, and a heat exchange fin is 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, 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, the top of the raised seat is rotatably connected to a screw rod, the top of the vertical rod is fixedly connected to the bottom of the support frame, the top of the screw rod 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 screw rod.

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

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

[0014] Preferably, the condensation mechanism includes a condensation processing chamber, which is fixedly installed on the top of the base, and the top of the condensation processing chamber is fixedly connected to a solenoid valve, the end of the transfer pipe away from the centralized pipe is fixedly connected to the top of the solenoid valve, the right side of the condensation processing chamber is fixedly connected to a water inlet valve pipe and a water outlet valve pipe, and the bottom of the condensation processing chamber is fixedly connected to a centralized outlet cover.

[0015] Preferably, a square partition 1 is fixedly installed on the inner wall of the condensation treatment chamber, a square partition 2 is fixedly installed on the inner wall of the condensation treatment chamber, the bottom of the square partition 1 is fixedly connected to a connecting pipe, the bottom of the connecting pipe is fixedly connected to a heat exchange copper pipe, and 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 tube, a connecting rod is fixedly connected to the inner wall of the inner support ring, an end of the connecting rod away from the inner wall of the inner support ring is fixedly connected to the inner ring part, an inner rotating block is rotatably connected to the inner wall of the inner ring part, the top of the inner rotating block is fixedly connected to the upper shaft part, a driving blade is fixedly installed on the outer wall of the upper shaft part, the bottom of the inner rotating block is fixedly connected to the lower shaft part, an inclined rod is fixedly connected to the outer wall of the lower shaft part, and a scraper is fixedly connected to the end of the inclined rod away from the lower shaft part, and the side of the scraper is movably connected to the inner wall of the heat exchange copper tube.

[0017] The present invention provides the following technical solution: a method for using a zero-discharge treatment device for leachate from a domestic waste landfill, comprising the following steps:

[0018] S1. First, the servo motor is controlled to drive the sliding seat upward, causing the top cover to move up from the top of the evaporation tank, and then the concentrated liquid to be processed can be added to the inner cavity of the evaporation tank. Then, the servo motor is controlled again to drive the top cover to move downward and reset, thus completing the addition of the concentrated liquid.

[0019] S2. Controlling the circulation pump to circulate the thermal oil through the inner cavity of the thermal oil tank, the delivery pipe, the heating sleeve, and the return pipe. Simultaneously, controlling the heating wire to heat the thermal oil, that is, heating the concentrated liquid in the evaporation tank, thereby promoting evaporation of the concentrated liquid.

[0020] S3. After the evaporation is completed, the servo motor is controlled to work and the top cover is driven to move upward as a whole, whereby the solid products remaining in the inner cavity of the evaporation tank can be extracted and then disposed of subsequently.

[0021] Due to the adoption of the above technical solution, the present invention has the following technical advancements compared to the prior art:

[0022] 1. The present invention provides a zero-discharge treatment device and method for leachate from a domestic waste landfill. Through the overall design of the liquid heating mechanism, when the circulating pump is in operation, the heat transfer oil circulates through the inner cavity of the heat transfer oil tank, the delivery pipe, the heating sleeve, and the return pipe. Simultaneously, the operation of the heating wire is controlled to heat the heat transfer oil, thereby heating the concentrated liquid inside the evaporator. Furthermore, through the design of a temperature sensor, the temperature of the heat transfer oil returning to the inner cavity of the heat transfer oil tank is detected. When the temperature exceeds a preset value, the heating wire is controlled to suspend operation, thereby avoiding the problem of high energy consumption caused by continuous operation. This allows for more accurate control of the evaporation temperature, improves energy utilization efficiency, ensures the stability of the device, and increases the service life of the device.

[0023] 2. The present invention provides a zero-discharge treatment device and method for leachate from a domestic waste landfill. 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 driving blades and the upper shaft to rotate, thereby causing the inner rotating block to rotate on the inner wall of the inner ring. Subsequently, the scraping bar is driven by the transmission of the lower shaft and the inclined rod to rotate on the inner wall of the heat exchange copper tube, thereby 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. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 This is a schematic diagram of the cross-section structure of the heating sleeve of the present invention;

[0026] Figure 3 This is a schematic diagram of the cross-section structure of the thermal oil tank of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the inner partition of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the support frame of the present invention;

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

[0030] Figure 7 This is a schematic diagram of the cross-section structure of the condensation treatment chamber of the present invention;

[0031] Figure 8 Schematic diagram of the cross-section structure of the heat exchange copper tube of the present invention;

[0032] Figure 9 for Figure 8 Schematic diagram of the enlarged structure at point A in the middle.

[0033] In the figure: 1. base; 11. support frame; 12. support sleeve; 13. evaporation tank; 2. liquid heating mechanism; 21. support leg; 22. heating sleeve; 23. vacuum chamber; 24. copper extension tank; 25. return pipe; 26. thermal oil tank; 27. circulation pump; 28. delivery pipe; 29. inner partition; 291. controller; 292. mesh plate; 293. temperature sensor; 294. through groove; 295. copper sleeve; 296. heating wire; 297. heat exchange fin; 3. liquid stirring mechanism; 31. support frame; 32. pad seat; 33. vertical rod; 34. screw rod; 35. servo motor; 36. slide Moving seat; 37, top cover; 371, driving motor; 372, rotating shaft; 373, stirring paddle; 374, branch pipe; 375, centralized pipe fitting; 376, transfer pipe; 4, condensing mechanism; 41, condensation treatment chamber; 42, solenoid valve; 43, water inlet valve pipe; 44, water outlet valve pipe; 45, centralized outlet cover; 46, square partition one; 47, square partition two; 48, connecting pipe; 481, inner support ring; 482, connecting rod; 483, inner ring; 484, inner rotating block; 485, upper shaft; 486, driving blade; 487, lower shaft; 488, inclined rod; 489, scraper; 49, heat exchange copper tube. DETAILED DESCRIPTION

[0034] The present invention is described in further detail below in conjunction with the embodiments:

[0035] Example 1

[0036] like Figures 1-9As shown, the present invention provides a zero-discharge treatment device for leachate from a domestic waste landfill, comprising a base 1, a support frame 11 fixedly mounted on the top of the base 1, a support sleeve 12 fixedly mounted on the inner wall of the support frame 11 near the top, an evaporation tank 13 fixedly mounted 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, a condensation mechanism 4 provided on the top of the base 1, the liquid heating mechanism 2 comprises a support leg 21 and a heat-conducting oil tank 26, the support leg 21 fixedly mounted on the top of the base 1, a heating sleeve 22 fixedly mounted on the top of the support leg 21, a vacuum chamber 23 provided inside the heating sleeve 22, a copper extension tank 24 fixedly mounted on the inner wall of the heating sleeve 22, the copper extension tank 24 fixedly connected to the bottom of the evaporation tank 13, a return pipe 25 fixedly connected to the top of the heating sleeve 22, and the heat-conducting oil tank 26. 6 is fixedly mounted 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 thermal oil tank 26. A circulation pump 27 is fixedly mounted on the bottom of the thermal oil tank 26. The input end of the circulation pump 27 is fixedly connected to the bottom of the thermal 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 concentrated liquid is added to the interior of the evaporation tank 13, the circulation pump 27 is controlled to operate so that the thermal oil circulates through the thermal 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 operate to heat the thermal oil. The thermal oil exchanges heat with the concentrated liquid through the copper extension tank 24, thus achieving the function of heating and evaporating the concentrated liquid. The design of the vacuum chamber 23 can reduce the natural heat loss rate of the thermal oil and reduce the consumption of heat energy.

[0037] Further, if Figure 3 、 Figure 4As shown, an inner partition 29 is fixedly installed on the inner wall of the thermal oil tank 26, a controller 291 is fixedly installed on the top of the thermal 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 design of the temperature sensor 293 can detect the temperature of the heat transfer oil returning to the inner cavity of the heat transfer oil tank 26 and feed back the temperature data to the controller 291. When the temperature is greater than the preset value, the controller 291 will control the heating wire 296 to stop working. Otherwise, it will control the heating wire 296 to work, thereby achieving a more accurate control of the evaporation temperature and increasing the energy utilization efficiency. It is worth noting that the temperature sensor 293 in this solution is a device that can be purchased by those skilled in the art on the market, and the device has not been structurally improved in this article. Therefore, those skilled in the art are familiar with its working principle based on their professional knowledge and can apply it skillfully. Therefore, this article will not elaborate on this. In addition, the controller 291 is a conventional device in the field. Its function is to receive the electrical signal of the temperature sensor 293. This technology is already well known to those skilled in the art and will not be elaborated on in this article. At the same time, this solution aims to protect the physical structure, but not the circuit and software control. The processing circuit proposed in this article is only a supplementary explanation of the feasibility and authenticity of the present invention. The present invention does not require protection for the algorithm and circuit technology. It is worth emphasizing that although this solution does not elaborate on the electronic control program part in detail, 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, part of the circulating heat transfer oil can flow through it, increasing the accuracy of the temperature measurement of the temperature sensor 293. The copper sleeve 295 is used to protect the heating wire 296. The heat generated 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, if Figure 5 、 Figure 6As shown, the liquid stirring mechanism 3 includes a support frame 31 and a cushion seat 32. The support frame 31 is fixedly mounted on the top of the support frame 11, and the cushion seat 32 is fixedly mounted on the top of the support frame 11. A vertical rod 33 is fixedly mounted on the top of the cushion seat 32. The top of the cushion seat 32 is rotatably connected to a screw rod 34. The top of the vertical rod 33 is fixedly connected to the bottom of the support frame 31, and the top of the screw rod 34 is rotatably connected to the bottom of the support frame 31. A servo motor 35 is fixedly mounted on the top of the support frame 31. The output shaft of the servo motor 35 is fixedly connected to the top of the screw rod 34. A sliding seat 36 is slidably connected to the outer wall of the vertical rod 33 and the screw rod 34. A top cover 37 is fixedly mounted on the right side of the sliding seat 36. The top cover 37 is movably plugged into the top of the evaporation tank 13. The top of the top cover 37 is detachably connected to a branch pipe 374. The end of the branch pipe 374 away from the top cover 37 is fixedly connected to The centralizing pipe 375 has a transfer pipe 376 fixedly connected to the back of the centralizing pipe 375. If it is necessary to add concentrated liquid, the servo motor 35 is first controlled to operate, which can drive the screw 34 to rotate, thereby driving the sliding seat 36 to move upward on the outer wall of the vertical rod 33, causing the top cover 37 to move up from the top of the evaporation tank 13, and then the concentrated liquid to be processed can be added to the inner cavity of the evaporation tank 13. The servo motor 35 is then controlled to operate again to drive the top cover 37 to move down and reset, thus completing the addition of concentrated liquid. When the position of the top cover 37 is adjusted to the top, the solid product remaining in the inner cavity of the evaporation tank 13 can be extracted and then subsequently disposed of. At the same time, the components originally in the inner cavity of the evaporation tank 13 can be maintained. When the concentrated liquid inside the evaporation tank 13 evaporates, the generated steam will be discharged through the inner cavity of the branch pipe 374, the centralizing pipe 375 and the transfer pipe 376.

[0039] Furthermore, if 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 concentrated liquid inside the evaporation tank 13 is evaporated, 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 concentrated liquid, improve the uniformity of heating, and thereby 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, if Figure 7As shown, the condensation mechanism 4 includes a condensation processing chamber 41, which is fixedly mounted on the top of the base 1, and a solenoid valve 42 is fixedly connected to the top of the condensation processing chamber 41. One end of the transfer pipe 376 away from the centralized pipe 375 is fixedly connected to the top of the solenoid valve 42. The right side of the condensation processing chamber 41 is fixedly connected to the water inlet valve pipe 43 and the water outlet valve pipe 44. The bottom of the condensation processing chamber 41 is fixedly connected to a centralized guide cover 45. A square partition 1 46 is fixedly mounted on the inner wall of the condensation processing chamber 41. A square partition 2 47 is fixedly mounted on the inner wall of the condensation processing chamber 41. A connecting pipe 48 is fixedly connected to the bottom of the connecting pipe 48. A heat exchange copper pipe 49 is fixedly connected to the top of the square partition 2 47. The evaporation tank 1 When the concentrated liquid inside evaporates, the generated steam will be output through the inner cavity of the branch pipe 374, the central pipe 375 and the transfer pipe 376, and then pass through the solenoid valve 42 to enter the inner cavity of the condensation processing chamber 41, and then flow through the inner cavity of the connecting pipe 48 and the heat exchange copper pipe 49. The water inlet valve pipe 43 is pre-connected to the cold water source, and the water outlet valve pipe 44 is connected to the hot water recovery end. The water inlet valve pipe 43 is controlled to be opened to transport cold water between the square partition 1 46 and the square partition 2 47. The cold water will pass through the heat exchange copper pipe 49 to exchange heat with the steam, causing the steam to condense into liquid, and then pass through the centralized outlet cover 45 for output. The heat will heat the cold water. Then the water outlet valve pipe 44 is controlled to be opened to output hot water, realizing the function of heat recovery and increasing the utilization efficiency of energy.

[0041] Furthermore, if Figure 8 、 Figure 9As shown, an inner support ring 481 is fixedly installed on the inner wall of the connecting pipe 48, and a connecting rod 482 is fixedly connected to the inner wall of the inner support ring 481. The end of the connecting rod 482 away from the inner wall of the inner support ring 481 is fixedly connected to the inner ring member 483, and an inner rotating block 484 is rotatably connected to the inner wall of the inner ring member 483. The top of the inner rotating block 484 is fixedly connected to the upper shaft member 485, and a driving blade 486 is fixedly installed on the outer wall of the upper shaft member 485. The bottom of the inner rotating block 484 is fixedly connected to the lower shaft member 487, and an inclined rod 488 is fixedly connected to the outer wall of the lower shaft member 487. The end of the inclined rod 488 away from the lower shaft member 487 is fixedly connected to a scraper 489, and the side of the scraper 489 is movably connected to the inner wall of the heat exchange copper tube 49. The inclined rod 488 has Elastic alloy, in the initial state, the elastic force of the inclined rod 488 can cause the scraper 489 to fit on the outer wall of the heat exchange copper tube 49. If the inner wall of the heat exchange copper tube 49 needs to be automatically cleaned, first close the solenoid valve 42 to accumulate a certain amount of steam, and then control the solenoid valve 42 to open, and high-pressure steam will flow into the inner cavity of the connecting pipe 48 and the heat exchange copper tube 49. The flow force of the steam can drive the driving 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, and then the scraper 489 is driven by the transmission of the lower shaft 487 and the inclined rod 488 to rotate on the inner wall of the heat exchange copper tube 49, thereby realizing the function of automatic scraping and cleaning of 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 a domestic waste landfill, comprising the following steps:

[0044] S1. First, the servo motor 35 is controlled to operate, driving the sliding seat 36 to move upward, causing the top cover 37 to move upward from the top of the evaporation tank 13, thereby adding the concentrated liquid to be processed into the inner cavity of the evaporation tank 13. Then, the servo motor 35 is controlled to operate again, driving the top cover 37 to move downward and return to its original position, thus completing the addition of the concentrated liquid.

[0045] S2. Controlling the circulation pump 27 to circulate the thermal oil through the thermal oil tank 26, the delivery pipe 28, the heating sleeve 22, and the inner cavity of the return pipe 25. Simultaneously, controlling the heating wire 296 to heat the thermal oil, that is, heating the concentrated liquid in the evaporation tank 13, thereby promoting the evaporation of the concentrated liquid.

[0046] S3. After the evaporation is completed, the servo motor 35 is controlled to work, driving the top cover 37 to move upward as a whole, thereby extracting the solid product remaining in the inner cavity of the evaporation tank 13 and then carrying out subsequent disposal.

[0047] It should be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," 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 mechanical 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 disclosure based on specific circumstances.

[0048] While the present invention has been generally described above, modifications and improvements are readily apparent to those skilled in the art. Therefore, modifications and improvements that do not depart from the spirit of the present invention are intended to be within the scope of the present invention.

Claims

1. A zero-discharge treatment device for leachate from a domestic waste landfill, characterized by: The evaporator comprises a base, a support frame is fixedly mounted on the top of the base, a support sleeve is fixedly mounted on the inner wall of the support frame near the top, an evaporator is fixedly mounted on the inner wall of the support sleeve, a liquid heating mechanism is provided on the top of the base, a liquid stirring mechanism is provided on the top of the support frame, and a condensing mechanism is provided on the top of the base; The liquid heating mechanism includes a support leg and a heat-conducting oil tank, the support leg is fixedly mounted on the top of the base, a heating sleeve is fixedly mounted on the top of the support leg, a vacuum chamber is provided inside the heating sleeve, a copper extension tank is fixedly mounted on the inner wall of the heating sleeve, the copper extension tank is fixedly connected to the bottom of the evaporation tank, a return pipe is fixedly connected to the top of the heating sleeve, the heat-conducting oil tank is fixedly mounted on the top of the base, the end of the return pipe away from the heating sleeve is fixedly connected to the top of the heat-conducting oil tank, a circulating pump is fixedly mounted on the bottom of the heat-conducting oil tank, the input end of the circulating pump is fixedly connected to the bottom of the heat-conducting oil tank, the output end of the circulating pump is fixedly connected to a delivery pipe, and the end of the delivery pipe away from the circulating pump is fixedly connected to the bottom of the heating sleeve.

2. The zero-discharge treatment device for leachate from a domestic waste landfill according to claim 1, characterized in that: An inner partition is fixedly mounted on the inner wall of the thermal oil tank, a controller is fixedly mounted on the top of the thermal oil tank, a mesh plate is fixedly mounted on the inner wall of the inner partition, and a temperature sensor is fixedly mounted on the top of the mesh plate.

3. The zero-discharge treatment device for leachate from a domestic waste landfill according to claim 2, characterized in that: A through slot is provided on the top of the inner partition, a copper sleeve is fixedly mounted on the inner wall of the through slot, a heating wire is fixedly mounted on the inner wall of the through slot and located in the inner cavity of the copper sleeve, and a heat exchange fin is fixedly connected to the outer wall of the copper sleeve.

4. The zero-discharge treatment device for leachate from a domestic waste landfill according to claim 1, characterized in that: The liquid stirring mechanism includes a support frame and a cushion seat, the support frame is fixedly installed on the top of the support frame, the cushion seat is fixedly installed on the top of the support frame, a vertical rod is fixedly installed on the top of the cushion seat, the top of the cushion seat is rotatably connected to a screw rod, the top of the vertical rod is fixedly connected to the bottom of the support frame, the top of the screw rod 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 screw rod.

5. The zero-discharge treatment device for leachate from a domestic waste landfill according to claim 4, characterized in that: A sliding seat is slidably connected to the outer walls of the vertical rod and the screw rod, a top cover is fixedly installed on the right side of the sliding seat, the top cover is movably plugged into the top of the evaporator, a branch pipe is detachably connected to the top of the top cover, the end of the branch pipe away from the top cover is fixedly connected to a central pipe fitting, and the back of the central pipe fitting is fixedly connected to a transfer pipe.

6. The zero-discharge treatment device for leachate from a domestic waste landfill according to claim 5, characterized in that: A driving 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 driving 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.

7. The zero-discharge treatment device for leachate from a domestic waste landfill according to claim 6, characterized in that: The condensation mechanism includes a condensation processing chamber, which is fixedly installed on the top of the base. The top of the condensation processing chamber is fixedly connected to a solenoid valve, and the end of the transfer pipe away from the centralized pipe is fixedly connected to the top of the solenoid valve. The right side of the condensation processing chamber is fixedly connected to an inlet valve pipe and an outlet valve pipe, and the bottom of the condensation processing chamber is fixedly connected to a centralized outlet cover.

8. The zero-discharge treatment device for leachate from a domestic waste landfill according to claim 7, characterized in that: A square partition 1 is fixedly installed on the inner wall of the condensation processing chamber, and a square partition 2 is fixedly installed on the inner wall of the condensation processing chamber. The bottom of the square partition 1 is fixedly connected to a connecting pipe, and the bottom of the connecting pipe is fixedly connected to a heat exchange copper pipe, and the heat exchange copper pipe is fixedly connected to the top of the square partition 2.

9. The zero-discharge treatment device for leachate from a domestic waste landfill according to claim 8, characterized in that: An inner support ring is fixedly installed on the inner wall of the connecting tube, and a connecting rod is fixedly connected to the inner wall of the inner support ring, and one end of the connecting rod away from the inner wall of the inner support ring is fixedly connected to the inner ring part, and an inner rotating block is rotatably connected to the inner wall of the inner ring part, and the top of the inner rotating block is fixedly connected to the upper shaft part, and a driving blade is fixedly installed on the outer wall of the upper shaft part, and the bottom of the inner rotating block is fixedly connected to the lower shaft part, and an oblique rod is fixedly connected to the outer wall of the lower shaft part, and a scraper is fixedly connected to the end of the oblique rod away from the lower shaft part, and the side of the scraper is movably connected to the inner wall of the heat exchange copper tube.

10. A method for using a zero-discharge treatment device for leachate from a domestic waste landfill according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, the servo motor is controlled to drive the sliding seat upward, causing the top cover to move up from the top of the evaporation tank, and then the concentrated liquid to be processed can be added to the inner cavity of the evaporation tank. Then, the servo motor is controlled again to drive the top cover to move downward and reset, thus completing the addition of the concentrated liquid. S2. Controlling the circulation pump to circulate the thermal oil through the inner cavity of the thermal oil tank, the delivery pipe, the heating sleeve, and the return pipe. Simultaneously, controlling the heating wire to heat the thermal oil, that is, heating the concentrated liquid in the evaporation tank, thereby promoting evaporation of the concentrated liquid. S3. After the evaporation is completed, the servo motor is controlled to work and the top cover is driven to move upward as a whole, whereby the solid products remaining in the inner cavity of the evaporation tank can be extracted and then disposed of subsequently.

Images