A method and device for advanced treatment of landfill leachate

Abstract

The present application relates to the technical field of contaminated liquid treatment, in particular to a landfill leachate advanced treatment method and equipment, which comprises an evaporation tank body, a heating assembly, a residue discharge pipe, a shaft rod two and a transmission assembly, the bottom end of the evaporation tank body is provided with a bottom sink cover, the top end of the evaporation tank body is provided with an upper cover body, the outside of the bottom sink cover is provided with a raw material liquid inlet, the top end of the upper cover body is provided with a discharge pipe in communication, and the bottom end of the bottom sink cover is fixedly provided with an outer protective shell. In the present application, the lower pressing plate deflects downward to press the crystalline powder downward, when the crystalline powder in the residue discharge pipe is filled, the lower pressing plate cannot deflect downward when it moves to the upper part of the residue discharge pipe, so that the shaft rod one is first moved downward and then reset, thereby releasing a part of the crystalline powder in the residue discharge pipe outward, so that the solid is automatically discharged outward during the treatment of the concentrated liquid, the water content of the discharged crystalline mixture is low, which is convenient for subsequent direct incineration and reduces the subsequent links.

Description

Technical Field

[0001] This invention relates to the field of polluted liquid treatment technology, specifically a method and equipment for deep treatment of landfill leachate. Background Technology

[0002] Landfill leachate treatment technology is an environmental protection technology for purifying high-concentration wastewater generated by landfills and incineration plants. It primarily treats leachate formed from rainwater, the moisture content of the waste itself, and degradation products. Leachate has a complex composition, containing heavy metals, ammonia nitrogen, and recalcitrant substances, and its quality fluctuates greatly. Reverse osmosis is generally used in leachate treatment. Reverse osmosis membranes have high permeability and desalination performance. After reverse osmosis treatment, fresh water is produced on one side, and a high-pressure concentrate is produced on the other. Subsequent treatment methods for the concentrate mainly include evaporation crystallization, direct incineration, and solidification backfilling. Evaporation crystallization consumes more energy but is more thorough and less prone to secondary pollution. However, with existing evaporation crystallization equipment, the concentrate easily seeps through the crystals during discharge, resulting in high water content in the discharged crystals. This necessitates subsequent centrifugation of the discharged crystal mixture before incineration, increasing the workload. Summary of the Invention

[0003] The purpose of this invention is to provide a method and equipment for deep treatment of landfill leachate, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A landfill leachate deep treatment device, comprising:

[0006] An evaporator body is provided with a bottom cover at the bottom and an upper cover at the top. A raw material inlet is provided on the outside of the bottom cover. An exhaust pipe is connected to the top of the upper cover. An outer protective shell is fixedly installed at the bottom of the bottom cover.

[0007] A heating assembly is installed on the evaporator tank body, and the heating assembly is used to heat the liquid inside the evaporator tank body;

[0008] A slag discharge pipe is connected to the bottom end of the settling cover. The slag discharge pipe is used to contain the crystals. A shaft is movably sleeved at the bottom end of the slag discharge pipe. A sealing disc is installed on the shaft and is used to seal the bottom end of the slag discharge pipe.

[0009] Shaft 2 is rotatably mounted at the bottom of the settling cover. A cap seat is fixedly connected to the top of shaft 2. Push rods are fixedly mounted on both sides of the cap seat. The push rods are used to push the crystals on the inner wall of the settling cover into the slag discharge pipe. A lower pressure plate is rotatably connected to one side of one of the cap seats. The lower pressure plate is used to compact the crystals in the slag discharge pipe. A drive motor is fixedly installed inside the outer shell. The output end of the drive motor is connected to shaft 2 through a transmission.

[0010] The transmission assembly is installed between the connecting rod and the shaft. When the pressure plate cannot deflect downwards above the upper slag discharge pipe, the transmission assembly drives the shaft to move downwards, thereby releasing the crystals in the slag discharge pipe.

[0011] Furthermore, the top end of the slag discharge pipe is provided with an arc-shaped cavity, and the bottom end of the slag discharge pipe is provided with a guide cavity.

[0012] Furthermore, the transmission assembly includes a connecting rod and a sleeve. The connecting rod is slidably sleeved with the inner wall of the shaft. A linkage module is provided between the top end of the connecting rod and the lower pressure plate. A ring frame is provided at the bottom end of the connecting rod. The top end of the sleeve is rotatably connected to the bottom end of the shaft. A ring frame is provided on the outer side of the sleeve.

[0013] Furthermore, the inner bottom surface of the outer shell is fixedly equipped with a rotating seat one and a rotating seat two. The ring frame one is rotatably connected to the rotating seat one, and the bottom end of the ring frame two is rotatably connected to the rotating seat two. A rib is slidably sleeved on the inner wall of the sleeve, and the bottom end of the rib is fixedly installed with the outer shell. An annular groove is fixedly opened inside the ring frame one, and a protrusion is fixedly connected to the top surface of the annular groove. A rocker arm is fixedly installed at the top end of the connecting rod one. A sliding groove is opened inside the ring frame two. A round rod two is fixedly installed on the outer wall of the sleeve. One end of the round rod two is slidably connected to the sliding groove. The rocker arm is used to abut against the protrusion. The ring frame one and the ring frame two are connected by transmission.

[0014] Furthermore, gears are fixedly installed on both the connecting rod and the shaft, and the two gears are connected by a transmission. A hinge blade is fixedly installed on the top of the shaft.

[0015] Furthermore, the linkage module includes a transmission rod, which is rotatably mounted on a push rod. One of the push rods has an embedded groove, and a rubber cover is fixedly installed in the embedded groove. A flat plate is fixedly installed on the inner bottom surface of the rubber cover, and a vertical rod is fixedly installed on the flat plate. The top end of the vertical rod is slidably inserted into the top end of the embedded groove. A slot frame one is fixedly installed at the bottom end of the rubber cover. A sliding rod frame is installed at one end of the lower pressure plate, and one end of the sliding rod frame is slidably connected to the slot frame one. A round rod three is fixedly connected to one side of the vertical rod. One end of the transmission rod is inserted into the interior of the rubber cover, and a slot frame two is installed at one end of the transmission rod. The round rod three is slidably connected to the slot frame two. The other end of the transmission rod is inserted into the interior of the cap seat, and a slot frame three is installed at the other end of the transmission rod. A round rod one is fixedly installed at the top end of the connecting rod one, and the round rod one is slidably connected to the slot frame three.

[0016] Furthermore, the heating assembly includes two liquid collecting rings, which are fixedly installed on the outer wall of the evaporator body. Multiple heating tubes are connected between the two liquid collecting rings, and the outer wall of the liquid collecting rings is fixedly connected to a connection port.

[0017] Furthermore, a demister plate is installed at the top of the evaporator.

[0018] Furthermore, a backflow plate is installed at the bottom of the evaporator.

[0019] The present invention also provides a method for deep treatment of landfill leachate, which specifically includes the following steps:

[0020] Step 1: Pretreatment. The leachate is guided into the equalization tank to control the pH value of the wastewater and stabilize the water quality, preventing high concentrations of salt from directly entering the biological treatment system. Then, the leachate is discharged into the sedimentation tank to separate the impurities in the leachate through sedimentation.

[0021] Step 2: The settled liquid is fed into an anaerobic reactor for anaerobic treatment, producing biogas as a byproduct. The liquid is then fed into an air flotation device for aeration, and a special scraper removes scum and oil to achieve solid-liquid separation. The liquid is then fed into a secondary sedimentation tank to retain sludge.

[0022] Step 3: The clarified liquid after secondary precipitation is filtered through a nanofiltration membrane to remove large organic molecules, divalent ions, and color. Then, the nanofiltration liquid is filtered again through a reverse osmosis device to remove small organic molecules and ions, and a by-product concentrate is produced.

[0023] Step 4: Pass the concentrated liquid into the deep treatment equipment for evaporation and crystallization treatment. The salt in the concentrated liquid is solidified and crystallized to achieve solid-liquid separation. The crystals are then directly incinerated.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. Through the setting of the slag discharge pipe and transmission components, when the lower pressure plate deflects to the top of the slag discharge pipe, it deflects downward to compact the crystallized powder. When the slag discharge pipe is filled with crystallized powder, the lower pressure plate can no longer deflect downward when it moves to the top of the slag discharge pipe. At this time, the rotation of shaft two drives shaft one to move down and then reset through the transmission components. When shaft one moves down, it releases the seal on the bottom of the slag discharge pipe, thereby releasing a portion of the crystallized powder in the slag discharge pipe to the outside. This achieves automatic discharge of solids during the treatment of concentrated liquid, and the discharged crystallized mixture has a low water content, which is convenient for subsequent direct incineration and reduces subsequent steps.

[0026] 2. The downward deflection of the lower pressure plate is driven by the following factors: the pressure of the lower pressure plate itself, the upward movement of the bottom of the rubber cover under water pressure, and the downward movement of the connecting rod under gravity. This increases the pressure of the lower pressure plate on the crystalline powder in the slag discharge pipe. The rotating blades compress the crystalline powder downwards, compacting it at the bottom of the slag discharge pipe and reducing its moisture content. This reduces the amount of liquid permeating the crystalline powder outwards from the slag discharge pipe when the shaft and sealing plate move down to release the seal on the shaft. The rotating blades also reduce the amount of powder discharged under hydraulic pressure. After the sealing plate releases the seal on the shaft, the rotating blades discharge the powder outwards, preventing the powder from being instantly flushed out by the water flow and causing leakage of the concentrate. This reduces the moisture content of the discharged crystalline powder. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the evaporator tank in this invention;

[0029] Figure 3 This is a schematic diagram of the internal structure of the recessed bottom cover in this invention;

[0030] Figure 4 This is a schematic diagram of the internal structure of the outer shell in this invention;

[0031] Figure 5 This is a top view schematic diagram of the recessed bottom cover structure in this invention;

[0032] Figure 6 This is a schematic diagram of the transmission component structure in this invention;

[0033] Figure 7 This is a schematic diagram of the linkage module structure in this invention;

[0034] Figure 8 This is a schematic diagram of the transmission rod structure in this invention.

[0035] In the diagram: 100, Evaporator body; 110, Upper cover; 120, Bottom cover; 121, Raw material inlet; 130, Outer shell; 131, Rotating seat one; 132, Rotating seat two; 140, Counterflow plate; 150, Defoaming plate; 200, Heating assembly; 210, Liquid collecting ring; 220, Heating tube; 230, Connecting port; 300, Slag discharge pipe; 310, Arc-shaped cavity; 320, Guide cavity; 330, Shaft one; 331, Sealing plate; 332, Hinge; 400, Shaft two; 410, Cap seat; 420, Push rod; 421, Embedded groove ; 430, Lower pressure plate; 431, Slide rod frame; 500, Drive motor; 600, Transmission assembly; 610, Connecting rod one; 611, Rocker arm; 612, Round rod one; 620, Ring frame one; 621, Protrusion; 630, Ring frame two; 631, Slide groove; 640, Sleeve; 641, Rib rod; 642, Round rod two; 650, Gear; 660, Linkage module; 661, Rubber cover; 662, Slot frame one; 663, Vertical pole; 664, Round rod three; 665, Flat plate; 666, Transmission rod; 667, Slot frame two; 668, Slot frame three. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1-6 In this embodiment of the invention, a method for deep treatment of landfill leachate specifically includes the following steps:

[0038] Step 1: Pretreatment. The leachate is guided into an equalization tank to control the pH value of the wastewater and stabilize the water quality, preventing high concentrations of salt from directly entering the biological treatment system. The leachate is then discharged into a sedimentation tank to separate impurities. Step 2: The settled liquid is then fed into an anaerobic reactor for anaerobic treatment, producing biogas as a byproduct. The liquid is then fed into a flotation unit for aeration, and a dedicated scraper removes scum and oil, achieving solid-liquid separation. Step 1: The sludge is introduced into the secondary sedimentation tank to trap it. Step 2: The clarified liquid after secondary sedimentation is filtered through a nanofiltration membrane to remove large organic molecules, divalent ions, and color. Then, the liquid after nanofiltration is filtered again through a reverse osmosis device to remove small organic molecules and ions, and to produce a by-product concentrate. Step 3: The concentrate is introduced into a deep treatment device for evaporation and crystallization to solidify and crystallize the salts in the concentrate, achieving solid-liquid separation. The crystals are then directly incinerated.

[0039] This invention also provides a landfill leachate deep treatment device, including an evaporator 100, a heating assembly 200, a slag discharge pipe 300, a shaft 400, and a transmission assembly 600. A bottom cover 120 is installed at the bottom of the evaporator 100, and an upper cover 110 is installed at the top. A raw material inlet 121 is provided on the outer side of the bottom cover 120. An exhaust pipe is connected to the top of the upper cover 110. An outer protective shell 130 is fixedly installed at the bottom of the bottom cover 120. The heating assembly 200 is installed on the evaporator 100 and is used to heat the liquid inside the evaporator 100. The slag discharge pipe 300 is connected to the bottom of the bottom cover 120 and is used to contain crystals. A shaft 330 is movably sleeved at the bottom of the slag discharge pipe 300, and a sealing disc 331 is installed on the shaft 330. The sealing disc 331 is used for... The bottom end of the slag discharge pipe 300 is sealed. The second shaft 400 is rotatably installed at the bottom end of the settling cover 120. The top end of the second shaft 400 is fixedly connected to the cap seat 410. Push rods 420 are fixedly installed on both sides of the cap seat 410. The push rods 420 are used to push the crystals on the inner wall of the settling cover 120 into the slag discharge pipe 300. A lower pressure plate 430 is rotatably connected to one side of one of the cap seats 410. The lower pressure plate 430 is used to compact the crystals in the slag discharge pipe 300. A drive motor 500 is fixedly installed in the outer shell 130. The output end of the drive motor 500 is connected to the second shaft 400. The transmission assembly 600 is installed between the first connecting rod 610 and the first shaft 330. When the lower pressure plate 430 cannot deflect downward above the upper slag discharge pipe 300, the transmission assembly 600 drives the first shaft 330 to move downward, thereby releasing the crystals in the slag discharge pipe 300.

[0040] Specifically, the concentrated liquid is filled into the bottom cover 120 and the evaporator 100. The heating component 200 heats the liquid in the evaporator 100, causing the liquid to evaporate and crystals to precipitate. The crystals sink into the bottom cover 120. The drive motor 500 drives the shaft 400 to rotate, which in turn drives the two push rods 420 to rotate. While the push rods 420 agitate the liquid, they also scrape off the crystals that have fallen onto the bottom cover 120, making it easier to fill the slag discharge pipe 300. The lower pressure plate 430 deflects. When the slag discharge pipe 300 is above the slag discharge pipe, the lower pressure plate 430 deflects downward to compact the crystalline powder. When the slag discharge pipe 300 is filled with crystalline powder (wet), the lower pressure plate 430 can no longer deflect downward when it moves above the slag discharge pipe 300. At this time, the rotation of the second shaft 400 drives the first shaft 330 to move down and then return to its original position through the transmission component 600. When the first shaft 330 moves down, it releases the seal on the bottom end of the slag discharge pipe 300, thereby releasing a portion of the crystalline powder in the slag discharge pipe 300 to the outside, so as to automatically discharge solids when processing the concentrate.

[0041] Example 1

[0042] like Figures 3-8 As shown, in this embodiment, the top end of the slag discharge pipe 300 is provided with an arc-shaped cavity 310, and the bottom end of the slag discharge pipe 300 is provided with a guide cavity 320. The transmission assembly 600 includes a connecting rod 610 and a sleeve 640. The connecting rod 610 is slidably sleeved with the inner wall of the shaft 400. A linkage module 660 is provided between the top end of the connecting rod 610 and the lower pressure plate 430. A ring frame 620 is provided at the bottom end of the connecting rod 610. The top end of the sleeve 640 is rotatably connected to the bottom end of the shaft 330. A ring frame 630 is provided on the outer side of the sleeve 640. A rotating seat 131 and a rotating seat 132 are fixedly installed on the inner bottom surface of the outer shell 130. The ring frame 620 is rotatably connected to the rotating seat 131, and the bottom end of the ring frame 630 is rotatably connected to the rotating seat 132. A prism rod 641 is slidably sleeved on the inner wall of the sleeve 640. The bottom end of the prism rod 641 is fixedly installed between the outer shell 130 and the inner wall of the ring frame 620. An annular groove is fixedly connected to the inside of the ring frame 620, and a protrusion 621 is fixedly connected to the top surface of the annular groove. A rocker arm 611 is fixedly installed at the top of the connecting rod 610. A sliding groove 631 is opened inside the ring frame 630. A round rod 642 is fixedly installed on the outer wall of the sleeve 640. One end of the round rod 642 is slidably connected to the sliding groove 631. The rocker arm 611 is used to abut against the protrusion 621. The ring frame 620 and the ring frame 630 are connected by transmission. Gears 650 are fixedly installed on both the connecting rod 610 and the shaft 330. The two gears 650 are connected by transmission. A hinge blade 332 is fixedly installed at the top of the shaft 330.

[0043] In this embodiment, when the lower pressure plate 430 deflects downward, the linkage module 660 drives the connecting rod 610 to move downward. When the shaft 400 rotates, it drives the connecting rod 610 to rotate synchronously. When the connecting rod 610 rotates, it drives the shaft 330 to rotate. Through the setting of the auger 332, the auger 332 rotates and squeezes the crystalline powder downward, so that the crystalline powder is compacted at the bottom of the slag discharge pipe 300, reducing the water content. Thus, when the shaft 330 and the sealing plate 331 move down to release the seal on the shaft 330, the amount of liquid permeating through the crystalline powder in the slag discharge pipe 300 is reduced. In addition, the setting of the auger 332 reduces the discharge of powder under the action of hydraulic pressure. After the sealing plate 331 releases the seal on the shaft 330, the auger 332 rotates to discharge the powder outward, thereby avoiding the discharge of powder. The powder is instantly flushed out by the water flow, causing the concentrate to leak. The downward deflection of the lower pressure plate 430 causes the connecting rod 610 to move downward during rotation. The downward movement of the connecting rod 610 allows the rocker arm 611 to avoid the protrusion 621. When the slag discharge pipe 300 is filled with crystals, the lower pressure plate 430 cannot deflect downward when passing over the slag discharge pipe 300. This causes the connecting rod 610 to push the protrusion 621 to rotate through the rocker arm 611 when rotating. When the ring frame 620 rotates, it drives the ring frame 630 to rotate. The sleeve 640 is restricted from rotating by the prism rod 641. As a result, when the ring frame 630 rotates one revolution, it drives the sleeve 640 to move downward and then upward to reset through the round rod 642. This drives the shaft 330 to move up and down. The up and down movement of the shaft 330 releases some of the crystal powder in the slag discharge pipe 300 outward.

[0044] Example 2

[0045] like Figures 2-8As shown, in this embodiment, the linkage module 660 includes a transmission rod 666, which is rotatably mounted on a push rod 420. An inner groove 421 is provided on the push rod 420, and a rubber cover 661 is fixedly installed on the inner groove 421. A flat plate 665 is fixedly installed on the inner bottom surface of the rubber cover 661, and a vertical rod 663 is fixedly installed on the flat plate 665. The top end of the vertical rod 663 is slidably inserted into the top end of the inner groove 421. A slot frame 662 is fixedly installed at the bottom end of the rubber cover 661. A sliding rod frame 431 is installed at one end of the lower pressure plate 430, and one end of the sliding rod frame 431 is slidably connected to the slot frame 662. A round rod 664 is fixedly connected to one side of the vertical rod 663. One end of the transmission rod 666 is inserted into the interior of the rubber cover 661. One end of the transmission rod 666 is equipped with a slot frame 667, and a round rod 664 is slidably connected to the slot frame 667. The other end of the transmission rod 666 is inserted into the inside of the cap seat 410, and a slot frame 668 is installed at the other end of the transmission rod 666. A round rod 612 is fixedly installed at the top of the connecting rod 610, and the round rod 612 is slidably connected to the slot frame 668. The heating assembly 200 includes two liquid collecting rings 210, which are fixedly installed on the outer side wall of the evaporator tank 100. Multiple heating tubes 220 are connected between the two liquid collecting rings 210. A connecting interface 230 is fixedly connected to the outer side wall of the liquid collecting ring 210. A defoaming plate 150 is installed at the top of the evaporator tank 100, and a backflow plate 140 is installed at the bottom of the evaporator tank 100.

[0046] In practice, when the lower pressure plate 430 deflects downward, the slide bar frame 431 lifts the first tank frame 662 upward, thereby driving the upright 663 to move upward. The upright 663 drives the transmission rod 666 to deflect, and the deflection of the transmission rod 666 drives the first connecting rod 610 to move downward. The rubber cover 661 separates the concentrate from the transmission rod 666 and the upright 663, preventing crystals from entering the second tank frame 667 and obstructing the movement of the upright 663 and the transmission rod 666. In addition to the weight of the lower pressure plate 430, the force driving the lower pressure plate 430 to deflect downward also includes the upward movement of the bottom end of the rubber cover 661 under water pressure, which drives the lower pressure plate 430 to deflect, and the downward movement of the first connecting rod 610 under gravity, which also drives the lower pressure plate 430 to deflect downward, thereby increasing the pressure of the lower pressure plate 430 on the crystallized powder in the slag discharge pipe 300.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for deep treatment of landfill leachate, characterized in that, Specifically, the steps include the following: Step 1: Pretreatment. The leachate is guided into the equalization tank to control the pH value of the wastewater and stabilize the water quality, preventing high concentrations of salt from directly entering the biological treatment system. Then, the leachate is discharged into the sedimentation tank to separate the impurities in the leachate through sedimentation. Step 2: The settled liquid is fed into an anaerobic reactor for anaerobic treatment, producing biogas as a byproduct. The liquid is then fed into an air flotation device for aeration, and a special scraper removes scum and oil to achieve solid-liquid separation. The liquid is then fed into a secondary sedimentation tank to retain sludge. Step 3: The clarified liquid after secondary precipitation is filtered through a nanofiltration membrane to remove large organic molecules, divalent ions, and color. Then, the nanofiltration liquid is filtered again through a reverse osmosis device to remove small organic molecules and ions, and a by-product concentrate is produced. Step 4: Pass the concentrated liquid into the deep treatment equipment for evaporation and crystallization treatment, solidify and crystallize the salt in the concentrated liquid to achieve solid-liquid separation, and then directly incinerate the crystals. The deep processing device includes: An evaporator (100) is provided with a bottom cover (120) at the bottom end and an upper cover (110) at the top end. A raw material inlet (121) is provided on the outside of the bottom cover (120). An exhaust pipe is connected to the top end of the upper cover (110). An outer protective shell (130) is fixedly installed at the bottom end of the bottom cover (120). A heating assembly (200) is installed on an evaporator (100) for heating the liquid inside the evaporator (100); A slag discharge pipe (300) is connected to the bottom end of the settling cover (120). The slag discharge pipe (300) is used to contain the crystals. A shaft (330) is movably sleeved at the bottom end of the slag discharge pipe (300). A sealing disc (331) is installed on the shaft (330). The sealing disc (331) is used to seal the bottom end of the slag discharge pipe (300). A second shaft (400) is rotatably mounted at the bottom end of a sinker cover (120). A cap seat (410) is fixedly connected to the top of the second shaft (400). Push rods (420) are fixedly mounted on both sides of the cap seat (410). The push rods (420) are used to push the crystals on the inner wall of the sinker cover (120) into the slag discharge pipe (300). A lower pressure plate (430) is rotatably connected to one side of one of the cap seats (410). The lower pressure plate (430) is used to compact the crystals in the slag discharge pipe (300). A drive motor (500) is fixedly mounted inside the outer shell (130). The output end of the drive motor (500) is connected to the second shaft (400) in a transmission connection. The transmission assembly (600) is installed between the connecting rod (610) and the shaft (330). When the pressure plate (430) cannot deflect downward above the upper slag discharge pipe (300), the transmission assembly (600) drives the shaft (330) to move downward, thereby releasing the crystals in the slag discharge pipe (300).

2. The method for deep treatment of landfill leachate according to claim 1, characterized in that, The top end of the slag discharge pipe (300) is provided with an arc-shaped cavity (310), and the bottom end of the slag discharge pipe (300) is provided with a guide cavity (320).

3. The method for deep treatment of landfill leachate according to claim 2, characterized in that, The transmission assembly (600) includes a connecting rod (610) and a sleeve (640). The connecting rod (610) is slidably sleeved with the inner wall of the shaft (400). A linkage module (660) is provided between the top end of the connecting rod (610) and the lower pressure plate (430). A ring frame (620) is provided at the bottom end of the connecting rod (610). The top end of the sleeve (640) is rotatably connected to the bottom end of the shaft (330). A ring frame (630) is provided on the outer side of the sleeve (640).

4. The method for deep treatment of landfill leachate according to claim 3, characterized in that, The inner bottom surface of the outer shell (130) is fixedly equipped with a rotating seat one (131) and a rotating seat two (132). The ring frame one (620) is rotatably connected to the rotating seat one (131), and the bottom end of the ring frame two (630) is rotatably connected to the rotating seat two (132). The inner wall of the sleeve (640) is slidably fitted with a rib (641), and the bottom end of the rib (641) is fixedly installed with the outer shell (130). The ring frame one (620) has an internally fixedly connected ring groove, and the ring... The top surface of the groove is fixedly connected to a protrusion (621), the top end of the connecting rod (610) is fixedly installed with a rocker arm (611), the inside of the ring frame (630) is provided with a sliding groove (631), the outer wall of the sleeve (640) is fixedly installed with a round rod (642), one end of the round rod (642) is slidably connected to the sliding groove (631), the rocker arm (611) is used to abut against the protrusion (621), and the ring frame (620) and the ring frame (630) are connected by transmission.

5. The method for deep treatment of landfill leachate according to claim 3, characterized in that, Gears (650) are fixedly installed on both the first connecting rod (610) and the first shaft (330), and the two gears (650) are connected by transmission. A hinge (332) is fixedly installed on the top of the first shaft (330).

6. A method for deep treatment of landfill leachate according to any one of claims 3 to 5, characterized in that, The linkage module (660) includes a transmission rod (666), which is rotatably mounted on a push rod (420). One of the push rods (420) has an inner groove (421), on which a rubber cover (661) is fixedly installed. A flat plate (665) is fixedly installed on the inner bottom surface of the rubber cover (661), and a vertical rod (663) is fixedly installed on the flat plate (665). The top end of the vertical rod (663) is slidably inserted into the top end of the inner groove (421). A slot frame (662) is fixedly installed at the bottom end of the rubber cover (661). A slide rod frame (431) is installed at one end of the lower pressure plate (430). One end of the frame (431) is slidably connected to the first slot frame (662). A round rod three (664) is fixedly connected to one side of the upright (663). One end of the transmission rod (666) is inserted into the inside of the rubber cover (661). A slot frame two (667) is installed on one end of the transmission rod (666). The round rod three (664) is slidably connected to the second slot frame (667). The other end of the transmission rod (666) is inserted into the inside of the cap seat (410). A slot frame three (668) is installed on the other end of the transmission rod (666). A round rod one (612) is fixedly installed on the top of the first connecting rod (610). The round rod one (612) is slidably connected to the third slot frame three (668).

7. The method for deep treatment of landfill leachate according to claim 1, characterized in that, The heating assembly (200) includes two liquid collection rings (210), which are fixedly installed on the outer side wall of the evaporator body (100). Multiple heating tubes (220) are connected between the two liquid collection rings (210), and the outer side wall of the liquid collection ring (210) is fixedly connected to a connection port (230).

8. The method for deep treatment of landfill leachate according to claim 1, characterized in that, A demister plate (150) is installed at the top of the evaporator (100).

9. A method for deep treatment of landfill leachate according to claim 1, characterized in that, A counterflow plate (140) is installed at the bottom of the evaporator tank (100).

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