A concentrated liquid evaporation treatment equipment and landfill leachate treatment process

Abstract

The invention discloses a concentrated liquid evaporation treatment device and a treatment process for landfill leachate, and relates to the technical field of landfill leachate treatment. The invention comprises a workbench, an evaporation barrel and a concentration auxiliary component. The landfill leachate is introduced into a landfill regulating tank, and is successively treated by a flotation tank, a stripping tower, an anaerobic tank, an aerobic tank, an MBR membrane tank and an RO reverse osmosis system. The treated landfill leachate is introduced into an evaporation barrel, and the evaporation barrel begins to concentrate and evaporate the leachate. The rotation of the lifting inner rod drives the lifting sleeve to rotate, thereby driving the stirring blades and the partitioning blade disc to rotate. The rotation of the stirring blades and the partitioning blade disc can stir the leachate, so that the leachate can be better heated and evaporated during the concentration process, thereby improving the effect of concentration and evaporation and improving work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of landfill leachate treatment, and in particular relates to concentrated liquid evaporation treatment equipment and a landfill leachate treatment process. Background Art

[0002] Leachate is a high-concentration organic wastewater formed by the water contained in the garbage in the landfill, the rain and snow water entering the landfill, and other water, minus the saturated water holding capacity of the garbage and the covering soil layer, and passing through the garbage layer and the covering soil layer.

[0003] The existing landfill leachate treatment process adopts "pre-treatment - pressurized dissolved air flotation - anaerobic biochemical - enhanced aerobic biochemical - non-membrane fine filtration system - MBR + RO - standard discharge". Among them, the enhanced aerobic biochemical constructs an aerobic biochemical NASMG enhanced microbial reaction system with a special configuration of microbial populations in the treatment system, and at the same time constructs a microbial membrane biochemical system (biofilm filler), diversion system and aeration system to decompose the macromolecular organic pollutants in the wastewater and degrade some of the pollutants;

[0004] Chinese patent application CN107827184A discloses an evaporator for treating high-concentration waste liquid, including a tank body, a stirring shaft with stirring blades and a liquid level detection device installed in the tank body, the stirring shaft is driven by a stirring motor on the top of the tank body, the liquid level detection device includes a float tube inserted in the tank body, a float floating in the float tube, a scale tube installed at the top of the float tube and placed outside the tank body, and a magnetic induction scale installed outside the scale tube, the scale tube is provided with a magnetic block that can move up and down, and the magnetic block and the floating ball are connected by a connecting rod; the stirring blades include multiple groups separated from each other up and down, and the stirring blades are axially slidably installed between the stirring blades and the stirring shaft; the use of a magnetic flap type liquid level detection device can avoid the defects of a U-shaped liquid level meter being unable to detect due to crystallization and a traditional ultrasonic liquid level meter being inaccurately detected due to internal liquid agitation; the use of stirring blades that can float up and down can timely reduce the stirring resistance and improve the stirring effect;

[0005] The above patents and prior art also have the following defects:

[0006] During the concentration and evaporation process, the leachate gradually turns into a viscous molten liquid due to the evaporation of water. The outer liquid absorbs more heat, while the inner liquid absorbs less heat, which gradually reduces the concentration and evaporation efficiency. It takes a lot of time to perform concentration and evaporation, which reduces the work efficiency. When the existing evaporation barrel is discharged, it is impossible to load the material. The concentrated leachate is a viscous molten liquid, and the discharge speed is slow, which increases the time required for the concentration and evaporation of the leachate, reduces the work efficiency, and reduces the applicability of the equipment.

[0007] Aiming at the problems of high load and low ammonia nitrogen removal rate in the original process biochemical pool, the process route after the transformation is "pressurized dissolved air flotation-ammonia stripping-improved A2O denitrification-MBR membrane-two-stage RO". The original anaerobic pool and denitrification pool are retained, and an air stirring system is installed to extend the hydraulic retention time to make it an anaerobic pool and anoxic pool. New aerobic pool nitrification liquid return and MBR sludge return pipelines are added to enhance the removal effect of nitrate nitrogen by denitrification in the anoxic pool. A first-stage reverse osmosis membrane is installed, and the original two-stage reverse osmosis (three membranes in parallel at the first stage) is upgraded to a two-stage two-group reverse osmosis (two membranes in each group, two groups in parallel constitute a first-stage reverse osmosis), increasing the water output of the reverse osmosis system. Summary of the invention

[0008] 1. Technical issues to be resolved

[0009] In view of the problems in the related art, the present invention proposes a concentrated liquid evaporation treatment equipment and a landfill leachate treatment process, which has the functions of stirring the leachate so that the leachate can be better heated and evaporated during the concentration process, improving the effect of concentration and evaporation, and improving work efficiency; the evaporation barrel is separated into upper and lower parts, so that the leachate in a molten state after concentration is discharged from the liquid outlet, and the leachate to be concentrated and evaporated enters the evaporation barrel, and the feeding work is completed while discharging, avoiding the phenomenon of being unable to feed during discharging, thereby improving work efficiency; the improved process is suitable for landfills, especially middle-aged and old landfills, and has the advantages of a wide range of applications, and solves the problem that the leachate gradually becomes a viscous molten liquid during the concentration and evaporation process, the concentration and evaporation efficiency will gradually decrease, and a large amount of time is required for concentration and evaporation, thereby reducing work efficiency; the evaporation barrel cannot be loaded when discharging, and the discharge speed of the concentrated leachate is slow, thereby increasing the time for concentration and evaporation of the leachate, low work efficiency, and reducing the applicability of the equipment; the original process has the technical problems of high load of the biochemical pool and low ammonia nitrogen removal rate.

[0010] (II) Technical solution

[0011] In order to solve the above technical problems, the present invention provides the following technical solutions: The present invention is a concentrated liquid evaporation processing equipment, comprising a workbench, an evaporation barrel and a concentration auxiliary component, wherein the evaporation barrel is arranged on the top surface of the workbench, and the concentration auxiliary component is arranged above the evaporation barrel;

[0012] The concentration auxiliary component includes a stirring blade, a partition leaf disc, a lifting inner rod and a lifting sleeve, wherein the lifting inner rod is arranged in the evaporation barrel, a plurality of stirring blades are fixedly mounted on the bottom surface of the lifting inner rod and are evenly distributed around the circumference, the lifting sleeve is slidably sleeved on the lifting inner rod, the partition leaf disc is arranged above the stirring blade, the partition leaf disc is fixedly mounted on the bottom surface of the lifting sleeve, and a plurality of blade closing openings are opened on the top surface of the partition leaf disc, and the blade closing openings are evenly distributed around the circumference;

[0013] When evaporation and concentration work is performed, the stirring blade and the partition leaf disc are located in the leachate, the lifting inner rod can rotate and drive the lifting sleeve to rotate, thereby driving the stirring blade and the partition leaf disc to rotate, and the rotation of the stirring blade and the partition leaf disc can stir the leachate; when loading and unloading work is performed, the lifting inner rod moves vertically to move the stirring blade to the blade closing mouth of the partition leaf disc, and the stirring blade and the partition leaf disc separate the interior of the evaporation barrel into upper and lower parts.

[0014] Preferably, the concentration auxiliary component also includes an inner rod mounting plate, a lifting electric push rod, a lifting connection block, a rotating motor, a sleeve mounting plate and a sleeve lifting cylinder, the inner rod mounting plate is arranged above the evaporation barrel, the two lifting electric push rods are fixedly mounted on the top surface of the evaporation barrel, one end of the lifting connection block is fixedly connected to the output end of the lifting electric push rod, and the other end is fixedly connected to the inner rod mounting plate, the sleeve mounting plate is arranged below the inner rod mounting plate, the rotating motor is fixedly mounted on the top surface of the inner rod mounting plate, the two sleeve lifting cylinders are respectively fixedly mounted on both sides of the rotating motor, the output end of the sleeve lifting cylinder passes through the inner rod mounting plate and is fixedly connected to the sleeve mounting plate, the top end of the lifting inner rod passes through the evaporation barrel and the sleeve mounting plate in turn and is rotatably connected to the bottom surface of the inner rod mounting plate, the output end of the rotating motor passes through the inner rod mounting plate and is fixedly connected to the lifting inner rod, and the top end of the lifting sleeve passes through the top wall of the evaporation barrel and is rotatably connected to the bottom surface of the sleeve mounting plate;

[0015] The concentration auxiliary component also includes a linkage rod, a pushing wedge block, a fixed wedge block, a fixed mounting plate and a return spring. The fixed mounting plate is fixedly mounted on the bottom surface of the sleeve mounting plate. A lifting slot is provided on one side of the fixed mounting plate. The fixed wedge block is arranged below the sleeve gear, and one end of the fixed wedge block is slidably mounted in the lifting slot. One end of the return spring is fixedly connected to the top surface of the lifting slot and the other end is fixedly connected to the fixed wedge block. A connecting slot is provided at one end of the sleeve mounting plate. The linkage rod is slidably mounted on the bottom surface of the sleeve mounting plate. One end of the linkage rod passes through the connecting slot and is fixedly connected to the connecting moving block, and the other end is fixedly mounted with the pushing wedge block.

[0016] The concentration auxiliary component also includes a connecting rod, a pushing wedge, a fixed wedge, a fixed mounting plate and a return spring. The fixed mounting plate is fixedly mounted on the bottom surface of the sleeve mounting plate, a lifting groove is opened on one side of the fixed mounting plate, the fixed wedge is arranged below the sleeve gear, one end of the fixed wedge is slidably mounted in the lifting groove, one end of the return spring is fixedly connected to the top surface of the lifting groove, and the other end is fixedly connected to the fixed wedge. A connecting groove is opened at one end of the sleeve mounting plate, the connecting rod is slidably mounted on the bottom surface of the sleeve mounting plate, one end of the connecting rod passes through the connecting groove and is fixedly connected to the connecting moving block, and the other end is fixedly mounted with the pushing wedge.

[0017] Preferably, the inner contour of the blade closing opening is equal to the outer contour of the stirring blade.

[0018] Preferably, a sealing strip is fixedly installed at the edge of the blade closing opening on the top surface of the partition blade disc, and when the stirring blade enters the blade closing opening, the sealing strip contacts the top surface of the stirring blade.

[0019] Preferably, when the connecting moving block is located at the position closest to the lifting sleeve, the inner rod gear is meshed with the rotating gear, and the transmission gear is meshed with the sleeve gear;

[0020] A rubber pad is fixedly mounted on the top surface of the fixed wedge;

[0021] A separation ring plate is fixedly installed on the inner wall of the evaporation barrel, the diameter of the stirring blade is smaller than the inner contour diameter of the separation ring plate, the diameter of the separation leaf disk is equal to the outer contour diameter of the separation ring plate, and the position of the separation ring plate is lower than the position of the feed port of the evaporation barrel.

[0022] A landfill leachate treatment process, using the above-mentioned concentrated liquid evaporation treatment equipment, comprises the following steps:

[0023] The leachate is introduced into the regulating tank of the landfill, and then into the flotation tank after treatment. After the flotation tank is treated with chemicals, it is passed through the stripping tower and then into the anaerobic tank. The leachate is hydrolyzed, acidified, formic acid is produced, and methanogenization is carried out simultaneously in the anaerobic tank, and it also plays a role in releasing phosphorus in municipal sewage treatment.

[0024] The landfill leachate after anaerobic treatment is passed into the anoxic tank for denitrification, reducing the nitrate nitrogen in the water to release nitrogen gas, while removing part of the BOD and improving the biodegradability of the leachate;

[0025] The landfill leachate after anoxic treatment is subjected to nitrification in an aerobic tank, and the organic nitrogen and ammonia nitrogen in the leachate are oxidized into nitrate nitrogen;

[0026] The landfill leachate after aerobic treatment is filtered through the MBR membrane pool and then enters the RO reverse osmosis system for treatment. After treatment, it meets the discharge standards, and the RO reverse osmosis concentrate is passed into the evaporation barrel for concentrated evaporation treatment;

[0027] The garbage leachate is passed into the evaporation barrel; the evaporation barrel begins to concentrate and evaporate the leachate, the lifting inner rod rotates to drive the lifting sleeve to rotate, thereby driving the stirring blades and the partition leaf disc to rotate, and the stirring blades and the partition leaf disc rotate to stir the leachate;

[0028] After the concentration and evaporation of the leachate is completed, the lifting inner rod moves vertically upward, and the lifting sleeve moves vertically downward. When the stirring blade is completely moved to the blade closing mouth of the partition leaf disc, the lifting inner rod and the lifting sleeve stop moving. The stirring blade and the partition leaf disc separate the interior of the evaporation barrel into upper and lower parts. The concentrated leachate is located in the lower space of the evaporation barrel and begins to discharge, and the upper space inside the evaporation barrel is used for feeding.

[0029] (III) Beneficial effects

[0030] Compared with the prior art, the present invention provides a concentrated liquid evaporation treatment device and a landfill leachate treatment process, which has the following beneficial effects:

[0031] 1. The leachate is introduced into the evaporation barrel, and the evaporation barrel begins to concentrate and evaporate the leachate. The rotation of the lifting inner rod drives the lifting sleeve to rotate, thereby driving the stirring blades and the partition leaf disc to rotate. The rotation of the stirring blades and the partition leaf disc can stir the leachate, so that the leachate can be better heated and evaporated during the concentration process, thereby improving the effect of concentration and evaporation and improving work efficiency.

[0032] 2. After the concentration and evaporation of the leachate are completed, the lifting inner rod moves vertically upward, and the lifting sleeve moves vertically downward. When the stirring blade completely moves to the blade closing mouth of the partition leaf disk, the lifting inner rod and the lifting sleeve stop moving, and the stirring blade and the partition leaf disk separate the inside of the evaporation barrel from top to bottom. The concentrated leachate is located in the lower space of the evaporation barrel and begins to discharge, and the upper space inside the evaporation barrel is used for feeding; the concentrated molten leachate is discharged from the liquid outlet, and the leachate to be concentrated and evaporated enters the evaporation barrel. The feeding work is completed while discharging, avoiding the phenomenon of being unable to feed during discharging, thereby improving work efficiency.

[0033] 3. When loading and discharging, the connecting moving block drives the pushing wedge block to move towards the lifting sleeve through the linkage rod, the pushing wedge block moves and squeezes the fixed wedge block, the fixed wedge block moves upward and contacts the extrusion sleeve gear, and the sleeve gear is fixed, so that the lifting sleeve is fixed, and the reset spring is compressed to prevent the lifting sleeve from losing fixation and deflection after the transmission gear and the sleeve gear are disengaged, which affects the mixing blade to enter the blade closing mouth, reduces the error, and improves the applicability of the equipment;

[0034] 4. The improved process is suitable for landfill leachate, which is conducive to changing the reality that traditional membrane treatment processes cannot reduce pollutants. The biochemical process will greatly reduce pollutants and allow difficult-to-degrade substances to enter the evaporator and leave the overall treatment system, thereby achieving sustainable treatment of landfill leachate.

[0035] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is one of the overall three-dimensional structural schematic diagrams of the present invention;

[0038] Figure 2 This is the second schematic diagram of the overall three-dimensional structure of the present invention;

[0039] Figure 3 It is one of the partial three-dimensional structural schematic diagrams of the present invention;

[0040] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at A;

[0041] Figure 5 This is the second schematic diagram of the partial three-dimensional structure of the present invention;

[0042] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at B;

[0043] Figure 7 This is the third schematic diagram of the partial three-dimensional structure of the present invention;

[0044] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at C;

[0045] Fig. 9 This is the fourth schematic diagram of the partial three-dimensional structure of the present invention;

[0046] Fig.10 For the present invention Fig. 9 Schematic diagram of the structure at D.

[0047] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0048] 1. Workbench; 2. Evaporation barrel; 201. Separation ring plate; 3. Concentration auxiliary component; 301. Stirring blade; 302. Separation blade disc; 303. Lifting inner rod; 304. Lifting sleeve; 305. Blade closing mouth; 306. Inner rod mounting plate; 307. Lifting electric push rod; 308. Lifting connecting block; 309. Rotating motor; 310. Sleeve mounting plate; 311. Sleeve lifting cylinder; 312. Inner rod gear; 313. Rotating gear; 314. Connecting rod; 315. Transmission gear; 316. Sleeve gear; 317. Connecting moving block; 318. Moving cylinder; 319. Linking rod; 320. Pushing wedge block; 321. Fixed wedge block; 322. Fixed mounting plate; 323. Reset spring; 324. Sealing strip. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0050] In the description of the present invention, it is necessary to understand that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention.

[0051] For examples, see Figure 1 - Fig.10 As shown, the present invention is a concentrated liquid evaporation processing device, comprising a workbench 1, an evaporation barrel 2 and a concentration auxiliary component 3, wherein the evaporation barrel 2 is arranged on the top surface of the workbench 1, and the concentration auxiliary component 3 is arranged above the evaporation barrel 2;

[0052] The concentration auxiliary component 3 includes a stirring blade 301, a partition leaf disc 302, a lifting inner rod 303 and a lifting sleeve 304. The lifting inner rod 303 is arranged in the evaporation barrel 2. A plurality of stirring blades 301 are fixedly installed on the bottom surface of the lifting inner rod 303 and are evenly distributed in a circle. The lifting sleeve 304 is slidably sleeved on the lifting inner rod 303. The partition leaf disc 302 is arranged above the stirring blade 301. The partition leaf disc 302 is fixedly installed on the bottom surface of the lifting sleeve 304. A plurality of blade closing openings 305 are opened on the top surface of the partition leaf disc 302. The blade closing openings 305 are evenly distributed in a circle.

[0053] When evaporation and concentration are performed, the stirring blade 301 and the partition leaf disc 302 are located in the leachate, and the lifting inner rod 303 can rotate and drive the lifting sleeve 304 to rotate, thereby driving the stirring blade 301 and the partition leaf disc 302 to rotate, and the stirring blade 301 and the partition leaf disc 302 can rotate to stir the leachate; when loading and unloading are performed, the lifting inner rod 303 moves vertically, so that the stirring blade 301 moves to the blade closing opening 305 of the partition leaf disc 302, and the stirring blade 301 and the partition leaf disc 302 separate the interior of the evaporation barrel 2 from top to bottom;

[0054] When in use, the leachate is introduced into the evaporation barrel 2, and the evaporation barrel 2 begins to concentrate and evaporate the leachate. At this time, the stirring blade 301 and the partition leaf disc 302 are both below the liquid surface of the leachate, and the stirring blade 301 is located below the partition leaf disc 302. The lifting inner rod 303 rotates to drive the lifting sleeve 304 to rotate, thereby driving the stirring blade 301 and the partition leaf disc 302 to rotate. The rotation of the stirring blade 301 and the partition leaf disc 302 can stir the leachate, so that the leachate can be better heated and evaporated during the concentration process, thereby improving the effect of concentration and evaporation and improving work efficiency. After the concentration and evaporation of the leachate is completed, the liquid level of the leachate drops, the stirring blade 301 is located below the liquid level of the leachate, the partition leaf disc 302 is located above the liquid level of the leachate, and the lifting inner rod 30 3 moves vertically upward, and the lifting sleeve 304 moves vertically downward. When the stirring blade 301 completely moves to the blade closing opening 305 of the partition leaf disc 302, the positions of the two are slightly higher than the liquid surface of the percolate, and the feeding amount of the upper space inside the evaporation barrel 2 is increased. The lifting inner rod 303 and the lifting sleeve 304 stop moving, and the stirring blade 301 and the partition leaf disc 302 separate the upper and lower parts of the evaporation barrel 2. The concentrated percolate is located in the lower space inside the evaporation barrel 2 and the discharge work begins. The upper space inside the evaporation barrel 2 is fed; the concentrated molten percolate is discharged from the liquid outlet at the bottom of the evaporation barrel 2, and the percolate to be concentrated and evaporated enters the evaporation barrel 2. The feeding work is completed while the discharge is in progress, and the phenomenon of being unable to feed during the discharge is avoided, thereby improving the work efficiency.

[0055] See also Figure 3The concentration auxiliary component 3 also includes an inner rod mounting plate 306, a lifting electric push rod 307, a lifting connection block 308, a rotating motor 309, a sleeve mounting plate 310 and a sleeve lifting cylinder 311. The inner rod mounting plate 306 is arranged above the evaporation barrel 2, and two lifting electric push rods 307 are fixedly installed on the top surface of the evaporation barrel 2. One end of the lifting connection block 308 is fixedly connected to the output end of the lifting electric push rod 307, and the other end is fixedly connected to the inner rod mounting plate 306. The sleeve mounting plate 310 is arranged below the inner rod mounting plate 306, and the rotating motor 309 is fixedly installed on the top of the inner rod mounting plate 306. On the motor bracket arranged on the surface (not shown in the figure), two sleeve lifting cylinders 311 are fixedly installed on both sides of the rotating motor 309 respectively, the output end of the sleeve lifting cylinder 311 passes through the inner rod mounting plate 306 and is fixedly connected with the sleeve mounting plate 310, the top of the lifting inner rod 303 passes through the top wall of the evaporation barrel 2 and the sleeve mounting plate 310 in sequence and is rotatably connected with the bottom surface of the inner rod mounting plate 306, the output end of the rotating motor 309 passes through the inner rod mounting plate 306 and is fixedly connected with the lifting inner rod 303, and the top of the lifting sleeve 304 passes through the top wall of the evaporation barrel 2 and is rotatably connected with the bottom surface of the sleeve mounting plate 310;

[0056] See also Figure 7 , Figure 8 The concentration auxiliary component 3 also includes an inner rod gear 312, a rotating gear 313, a connecting rod 314, a transmission gear 315, a sleeve gear 316, a connecting moving block 317 and a moving cylinder 318. The inner rod gear 312 is fixedly sleeved on the top of the lifting inner rod 303, a moving groove is opened on one side of the sleeve mounting plate 310, and a moving opening is opened on the top surface of the sleeve mounting plate 310. The moving opening passes through the moving groove, and the connecting moving block 317 is slidably installed in the moving groove. The rotating gear 313 is set on the sleeve mounting plate Above the plate 310, the bottom end of the rotating gear 313 is fixedly connected to the top end of the connecting rod 314, the transmission gear 315 is arranged at the bottom end of the sleeve mounting plate 310, the connecting rod 314 passes through the moving opening and is fixedly connected to the transmission gear 315, the connecting moving block 317 is rotatably connected to the connecting rod 314, the cylinder body of the moving cylinder 318 is fixedly installed on one side of the sleeve mounting plate 310, the output end of the moving cylinder 318 is fixedly connected to the connecting moving block 317, and the sleeve gear 316 is fixedly sleeved on the lifting sleeve 304;

[0057] See also Fig. 9 , Fig.10The concentration auxiliary component 3 also includes a linkage rod 319, a pushing wedge block 320, a fixed wedge block 321, a fixed mounting plate 322 and a return spring 323. The fixed mounting plate 322 is fixedly mounted on the bottom surface of the sleeve mounting plate 310. A lifting groove is provided on one side of the fixed mounting plate 322. The fixed wedge block 321 is arranged below the sleeve gear 316. One end of the fixed wedge block 321 is slidably mounted in the lifting groove. One end of the return spring 323 is fixedly connected to the top surface of the lifting groove, and the other end is fixedly connected to the fixed wedge block 321. A connecting groove is provided at one end of the sleeve mounting plate 310. The connecting groove, the moving port and the moving groove are interconnected. The linkage rod 319 is slidably mounted on the bottom surface of the sleeve mounting plate 310. One end of the linkage rod 319 passes through the connecting groove and is fixedly connected to the connecting moving block 317, and the other end is fixedly mounted with a pushing wedge block 320.

[0058] When in use, the rotating motor 309 drives the lifting inner rod 303 to rotate; the lifting electric push rod 307 drives the inner rod mounting plate 306 to move vertically, the inner rod mounting plate 306 drives the lifting inner rod 303 and the sleeve lifting cylinder 311 to move vertically, and the sleeve lifting cylinder 311 drives the sleeve mounting plate 310 to move vertically;

[0059] When in use, the connecting moving block 317 can be driven to move by the moving cylinder 318, and the connecting moving block 317 drives the connecting rod 314 to move, and then drives the rotating gear 313 at the upper end of the connecting rod 314 and the transmission gear 315 at the lower end to approach or move away from the lifting inner rod 303 and the lifting sleeve 304. When the output end of the moving cylinder 318 is extended to the maximum extent, the rotating gear 313 is meshed with the inner rod gear 312 on the lifting inner rod 303, and the transmission gear 315 is meshed with the sleeve gear 316 on the lifting sleeve 304. When stirring, the moving cylinder 31 8 The output end is extended to the maximum extent, the lifting inner rod 303 drives the inner rod gear 312 to rotate, the inner rod gear 312 drives the rotating gear 313 to rotate, the rotating gear 313 drives the transmission gear 315 to rotate, the transmission gear 315 drives the sleeve gear 316 to rotate, and the sleeve gear 316 rotates to drive the lifting sleeve 304 to rotate; when loading and discharging, the output end of the moving cylinder 318 contracts, driving the connecting moving block 317 to move, so that the inner rod gear 312 and the rotating gear 313, as well as the transmission gear 315 and the sleeve gear 316 are released from meshing relationship;

[0060] During use, when loading and discharging, the connecting moving block 317 drives the pushing wedge block 320 to move towards the direction close to the lifting sleeve 304 through the connecting rod 319, pushing the wedge block 320 to move and squeeze the fixed wedge block 321, and the fixed wedge block 321 moves upward and contacts the squeezing sleeve gear 316, thereby fixing the sleeve gear 316, thereby fixing the lifting sleeve 304, and compressing the return spring 323 to prevent the lifting sleeve 304 from losing its fixation and shifting after the transmission gear 315 and the sleeve gear 316 are disengaged, thereby affecting the stirring blade 301 from entering the blade closing port 305, reducing errors, and improving the applicability of the equipment.

[0061] See also Figure 3 , Figure 4 , the inner contour of the blade closing opening 305 is equal to the outer contour of the stirring blade 301;

[0062] When in use, the stirring blade 301 enters the blade closing contour, so that the partition leaf disc 302 divides the interior of the evaporation barrel 2 into two parts, an upper part and a lower part.

[0063] See also Figure 4 A sealing strip 324 is fixedly installed at the edge of the blade closing opening 305 on the top surface of the partition blade disc 302. When the stirring blade 301 enters the blade closing opening 305, the sealing strip 324 contacts the top surface of the stirring blade 301.

[0064] When in use, the sealing strip 324 seals the connection between the stirring blade 301 and the partition blade disc 302 to prevent the unevaporated and concentrated leachate from mixing into the concentrated and evaporated leachate.

[0065] See also Figure 6 , Figure 8 , when the connecting moving block 317 is located at the position closest to the lifting sleeve 304, the inner rod gear 312 is meshed with the rotating gear 313, and the transmission gear 315 is meshed with the sleeve gear 316;

[0066] See also Fig.10 , a rubber pad is fixedly mounted on the top surface of the fixed wedge block 321;

[0067] See also Figure 3 , Figure 5 A separation ring plate 201 is fixedly installed on the inner wall of the evaporation barrel 2, the diameter of the stirring blade 301 is smaller than the inner contour diameter of the separation ring plate 201, the diameter of the separation blade plate 302 is equal to the outer contour diameter of the separation ring plate 201, and the position of the separation ring plate 201 is lower than the feed port position of the evaporation barrel 2;

[0068] When in use, the fixed wedge block 321 fixes the sleeve gear 316, and the rubber pad acts as a buffer;

[0069] When in use, the separation ring plate 201 seals the contact point between the separation leaf disc 302 and the inner wall of the evaporation barrel 2 .

[0070] A landfill leachate treatment process, using the above-mentioned concentrated liquid evaporation treatment equipment, comprises the following steps:

[0071] The leachate is introduced into the regulating tank of the landfill, and then into the flotation tank after treatment. After the flotation tank is treated with chemicals, it is passed through the stripping tower and then into the anaerobic tank. The leachate is hydrolyzed, acidified, formic acid is produced, and methanogenization is carried out simultaneously in the anaerobic tank, and it also plays a role in releasing phosphorus in municipal sewage treatment.

[0072] The landfill leachate after anaerobic treatment is passed into the anoxic tank for denitrification, reducing the nitrate nitrogen in the water to release nitrogen gas, while removing part of the BOD and improving the biodegradability of the leachate;

[0073] The landfill leachate after anoxic treatment is subjected to nitrification in an aerobic tank, and the organic nitrogen and ammonia nitrogen in the leachate are oxidized into nitrate nitrogen;

[0074] The landfill leachate after aerobic treatment is filtered through the MBR membrane pool and then enters the RO reverse osmosis system for treatment. After treatment, it meets the discharge standards, and the RO reverse osmosis concentrated liquid is passed into the evaporation barrel 2 for concentrated evaporation treatment;

[0075] Compared with the original process, the improved process:

[0076] Add a stripping tower and start it when the ammonia nitrogen content in the raw water is higher than 2000 mg / l, which can effectively reduce the ammonia nitrogen influent load of the biochemical pool and maintain the stable operation of the biochemical system.

[0077] Activated sludge is added to the aerobic tank and MBR membrane tank to replace the original NASMG enhanced microorganisms. At the same time, a nitrification liquid return pipeline from the aerobic tank to the anoxic tank is added so that the nitrate nitrogen generated in the aerobic tank can be returned to the anoxic tank for denitrification, generating nitrogen gas for removal, and controlling the total nitrogen in the leachate to be within the standard range.

[0078] Adding anaerobic tanks and anoxic tanks to mix reactors allows sewage to fully contact with microorganisms and achieves a good mass transfer effect. The air agitator currently used for aeration system transformation can be transformed into a mechanical mixing agitator based on the use effect.

[0079] An MBR sludge return pipeline was added to maintain the sludge concentration in the MBR pool within a normal range, extend the sludge age and enhance the denitrification effect.

[0080] Add a sodium hypochlorite dosing system for MBR produced water. Since sludge is added to the MBR membrane pool to enhance nitrification, adding sodium hypochlorite can effectively oxidize some residual microorganisms in the MBR produced water and reduce the occurrence of fouling of the back-end reverse osmosis membrane.

[0081] By adding a first-stage reverse osmosis membrane shell, the original three parallel membrane shells of the first-stage reverse osmosis are changed to two groups of two membrane shells in parallel. On the one hand, the water production of the reverse osmosis system is increased. At the same time, when any group of reverse osmosis membranes is blocked by dirt, the other group of membranes can continue to produce water without being affected, thereby increasing the stability of the system.

[0082] The garbage leachate is passed into the evaporation barrel 2; the evaporation barrel 2 begins to concentrate and evaporate the leachate, the lifting inner rod 303 rotates to drive the lifting sleeve 304 to rotate, thereby driving the stirring blade 301 and the partition leaf disc 302 to rotate, and the stirring blade 301 and the partition leaf disc 302 rotate to stir the leachate;

[0083] After the concentration and evaporation of the leachate is completed, the lifting inner rod 303 moves vertically upward and the lifting sleeve 304 moves vertically downward. When the stirring blade 301 is completely moved to the blade closing port 305 of the partition leaf disc 302, the lifting inner rod 303 and the lifting sleeve 304 stop moving. The stirring blade 301 and the partition leaf disc 302 separate the interior of the evaporation barrel 2 into the upper and lower parts. The concentrated leachate is located in the lower space of the evaporation barrel 2 and begins to discharge, and the upper space inside the evaporation barrel 2 is used for feeding.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] The preferred embodiments of the invention disclosed above are only used to help illustrate the invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the invention, so that those skilled in the art can better understand and use the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A concentrated liquid evaporation treatment device, comprising a workbench, an evaporation barrel and a concentration auxiliary component, characterized in that: The evaporation barrel is arranged on the top surface of the workbench, and the concentration auxiliary component is arranged above the evaporation barrel; The concentration auxiliary component includes a stirring blade, a partition leaf disc, a lifting inner rod and a lifting sleeve, wherein the lifting inner rod is arranged in the evaporation barrel, a plurality of stirring blades are fixedly mounted on the bottom surface of the lifting inner rod and are evenly distributed around the circumference, the lifting sleeve is slidably sleeved on the lifting inner rod, the partition leaf disc is arranged above the stirring blade, the partition leaf disc is fixedly mounted on the bottom surface of the lifting sleeve, and a plurality of blade closing openings are opened on the top surface of the partition leaf disc, and the blade closing openings are evenly distributed around the circumference; When evaporation and concentration work is performed, the stirring blade and the partition leaf disc are located in the leachate, the lifting inner rod can rotate and drive the lifting sleeve to rotate, thereby driving the stirring blade and the partition leaf disc to rotate, and the rotation of the stirring blade and the partition leaf disc can stir the leachate; when loading and unloading work is performed, the lifting inner rod moves vertically to move the stirring blade to the blade closing mouth of the partition leaf disc, and the stirring blade and the partition leaf disc separate the interior of the evaporation barrel into upper and lower parts.

2. The concentrated liquid evaporation treatment equipment according to claim 1, characterized in that: The concentration auxiliary component also includes an inner rod mounting plate, a lifting electric push rod, a lifting connection block, a rotating motor, a sleeve mounting plate and a sleeve lifting cylinder, the inner rod mounting plate is arranged above the evaporation barrel, the two lifting electric push rods are fixedly mounted on the top surface of the evaporation barrel, one end of the lifting connection block is fixedly connected to the output end of the lifting electric push rod, and the other end is fixedly connected to the inner rod mounting plate, the sleeve mounting plate is arranged below the inner rod mounting plate, the rotating motor is fixedly mounted on the top surface of the inner rod mounting plate, the two sleeve lifting cylinders are respectively fixedly mounted on both sides of the rotating motor, the output end of the sleeve lifting cylinder passes through the inner rod mounting plate and is fixedly connected to the sleeve mounting plate, the top end of the lifting inner rod passes through the evaporation barrel and the sleeve mounting plate in turn and is rotatably connected to the bottom surface of the inner rod mounting plate, the output end of the rotating motor passes through the inner rod mounting plate and is fixedly connected to the lifting inner rod, and the top end of the lifting sleeve passes through the top wall of the evaporation barrel and is rotatably connected to the bottom surface of the sleeve mounting plate; The concentration auxiliary component also includes an inner rod gear, a rotating gear, a connecting rod, a transmission gear, a sleeve gear, a connecting moving block and a moving cylinder. The inner rod gear is fixedly sleeved on the top of the lifting inner rod, a moving groove is opened on one side of the sleeve mounting plate, a moving opening is opened on the top surface of the sleeve mounting plate, and the moving opening passes through the moving groove. The connecting moving block is slidably installed in the moving groove. The rotating gear is arranged above the sleeve mounting plate, the bottom end of the rotating gear is fixedly connected to the top of the connecting rod, the transmission gear is arranged at the bottom end of the sleeve mounting plate, the connecting rod passes through the moving opening and is fixedly connected to the transmission gear, the connecting moving block is rotatably connected to the connecting rod, the cylinder body of the moving cylinder is fixedly mounted on one side of the sleeve mounting plate, the output end of the moving cylinder is fixedly connected to the connecting moving block, and the sleeve gear is fixedly sleeved on the lifting sleeve; The concentration auxiliary component also includes a connecting rod, a pushing wedge, a fixed wedge, a fixed mounting plate and a return spring. The fixed mounting plate is fixedly mounted on the bottom surface of the sleeve mounting plate, a lifting groove is opened on one side of the fixed mounting plate, the fixed wedge is arranged below the sleeve gear, one end of the fixed wedge is slidably mounted in the lifting groove, one end of the return spring is fixedly connected to the top surface of the lifting groove, and the other end is fixedly connected to the fixed wedge. A connecting groove is opened at one end of the sleeve mounting plate, the connecting rod is slidably mounted on the bottom surface of the sleeve mounting plate, one end of the connecting rod passes through the connecting groove and is fixedly connected to the connecting moving block, and the other end is fixedly mounted with the pushing wedge.

3. The concentrated liquid evaporation treatment equipment according to claim 2, characterized in that: The inner contour of the blade closing opening is equal in size to the outer contour of the stirring blade.

4. The concentrated liquid evaporation treatment equipment according to claim 3, characterized in that: A sealing strip is fixedly installed at the edge of the blade closing opening on the top surface of the partition blade disc. When the stirring blade enters the blade closing opening, the sealing strip contacts the top surface of the stirring blade.

5. The concentrated liquid evaporation treatment equipment according to claim 4, characterized in that: When the connecting moving block is located at the position closest to the lifting sleeve, the inner rod gear is meshed with the rotating gear, and the transmission gear is meshed with the sleeve gear; A rubber pad is fixedly mounted on the top surface of the fixed wedge; A separation ring plate is fixedly installed on the inner wall of the evaporation barrel, the diameter of the stirring blade is smaller than the inner contour diameter of the separation ring plate, the diameter of the separation leaf disk is equal to the outer contour diameter of the separation ring plate, and the position of the separation ring plate is lower than the position of the feed port of the evaporation barrel.

6. A landfill leachate treatment process, characterized in that: The concentrated liquid evaporation treatment equipment according to any one of claims 1 to 5 is used, comprising the following steps: The leachate is introduced into the regulating tank of the landfill, and then into the flotation tank after treatment. After the flotation tank is treated with chemicals, it is passed through the stripping tower and then into the anaerobic tank. The leachate is hydrolyzed, acidified, formic acid is produced, and methanogenization is carried out simultaneously in the anaerobic tank, and it also plays a role in releasing phosphorus in municipal sewage treatment. The landfill leachate after anaerobic treatment is passed into the anoxic tank for denitrification, reducing the nitrate nitrogen in the water to release nitrogen gas, while removing part of the BOD and improving the biodegradability of the leachate; The landfill leachate after anoxic treatment is subjected to nitrification in an aerobic tank, and the organic nitrogen and ammonia nitrogen in the leachate are oxidized into nitrate nitrogen; The landfill leachate after aerobic treatment is filtered through the MBR membrane pool and then enters the RO reverse osmosis system for treatment. After treatment, it meets the discharge standards, and the RO reverse osmosis concentrate is passed into the evaporation barrel for concentrated evaporation treatment; The garbage leachate is passed into the evaporation barrel; the evaporation barrel begins to concentrate and evaporate the leachate, the lifting inner rod rotates to drive the lifting sleeve to rotate, thereby driving the stirring blades and the partition leaf disc to rotate, and the stirring blades and the partition leaf disc rotate to stir the leachate; After the concentration and evaporation of the leachate is completed, the lifting inner rod moves vertically upward, and the lifting sleeve moves vertically downward. When the stirring blade is completely moved to the blade closing mouth of the partition leaf disc, the lifting inner rod and the lifting sleeve stop moving. The stirring blade and the partition leaf disc separate the interior of the evaporation barrel into upper and lower parts. The concentrated leachate is located in the lower space of the evaporation barrel and begins to discharge, and the upper space inside the evaporation barrel is used for feeding.

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