CN114590927A

CN114590927A - Rural domestic waste leachate low-cost treatment equipment

Info

Publication number: CN114590927A
Application number: CN202210263804.5A
Authority: CN
Inventors: 胡春明; 陈灏; 尤立; 刘平
Original assignee: Research Center for Eco Environmental Sciences of CAS
Current assignee: Research Center for Eco Environmental Sciences of CAS
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2022-06-07
Anticipated expiration: 2042-03-17
Also published as: CN114590927B

Abstract

The invention belongs to the field of environment-friendly equipment for sewage treatment, and particularly relates to low-cost treatment equipment for rural domestic waste leachate, which comprises a first regulating tank, wherein a diluting mechanism is arranged in the first regulating tank, and a first solution cavity for keeping the diluting uniformity of the leachate is arranged below the diluting mechanism; a first-stage filtering mechanism for primarily filtering leachate is arranged in the second regulating tank, and a second-stage filtering mechanism for precipitating leachate through a flocculating agent is arranged below the first-stage filtering mechanism; the device comprises a first reaction tank, wherein a plurality of filter pipes which are sequentially communicated end to end are vertically arranged in the first reaction tank; the second reaction tank is internally provided with a plurality of membrane assemblies and a cleaning assembly for cleaning the membrane assemblies, and an impurity collecting assembly is arranged below the cleaning assembly. According to the invention, on one hand, the working load of the membrane module can be reduced by using the concentration of the produced water diluted leachate, and on the other hand, the maintenance cost of the membrane module can be reduced.

Description

Rural domestic waste leachate low-cost treatment equipment

Technical Field

The invention belongs to the field of environment-friendly equipment for sewage treatment, and particularly relates to low-cost treatment equipment for rural domestic waste leachate.

Background

The membrane bioreactor is a novel water treatment technology combining an efficient membrane separation technology and an activated sludge process. The application of the hollow fiber membrane replaces a secondary sedimentation tank in an activated sludge process to carry out solid-liquid separation, thereby effectively achieving the purpose of sludge-water separation. The efficient interception function of the membrane is fully utilized, the nitrifying bacteria can be effectively intercepted and completely retained in the bioreactor, so that the nitrification reaction is guaranteed to be smoothly carried out, the ammonia nitrogen is effectively removed, the loss of sludge is avoided, the macromolecular organic matters which are difficult to degrade temporarily can be intercepted, the retention time of the macromolecular organic matters in the reactor is prolonged, and the decomposition is carried out to the maximum extent. After the MBR technology is applied, the removal rate of main pollutants can reach: COD is more than or equal to 93 percent, and SS is 100 percent. The produced water suspended matter and turbidity are nearly zero, the treated water quality is good and stable, and the treated water can be directly recycled, thereby realizing the recycling of sewage. In the existing equipment, aiming at leachate with higher concentration, membrane pollution becomes a more serious problem, the membrane pollution is particles, colloid particles or solute macromolecules which are contacted with a membrane, and the adsorption and deposition on the surface of the membrane and in membrane holes are realized through physical, chemical, biological and mechanical effects, so that the effective pore diameter of the membrane is reduced or even blocked due to long-time accumulation, the effect of the membrane is seriously influenced, and the cleaning is more complicated, for example, the combined cleaning such as mechanical cleaning, on-line medicinal cleaning, aeration cleaning and the like is carried out, so that the maintenance cost is high; therefore, a low-cost treatment device for rural domestic waste leachate, which can reduce the working load of the membrane module and the maintenance cost, is needed.

Disclosure of Invention

The invention aims to provide low-cost treatment equipment for rural domestic waste leachate, which aims to solve the problems and achieve the aims of reducing the working load of a membrane component and reducing the maintenance cost.

In order to achieve the purpose, the invention provides the following scheme: a low-cost treatment device for rural domestic waste leachate comprises

The leachate treatment device comprises a first adjusting tank, a second adjusting tank and a third adjusting tank, wherein a dilution mechanism is arranged in the first adjusting tank, and a first solution cavity for keeping the dilution uniformity of leachate is arranged below the dilution mechanism;

a first-stage filtering mechanism for primarily filtering the leachate is arranged in the second regulating tank, and a second-stage filtering mechanism for precipitating the leachate through a flocculating agent is arranged below the first-stage filtering mechanism;

the device comprises a first reaction tank, wherein a plurality of filter pipes which are sequentially communicated end to end are vertically arranged in the first reaction tank;

the device comprises a first reaction tank, a second reaction tank and a cleaning assembly, wherein a plurality of membrane assemblies are arranged in the first reaction tank, the cleaning assembly is used for cleaning the membrane assemblies, and an impurity collecting assembly is arranged below the cleaning assembly;

the first regulating reservoir, the second regulating reservoir, the first reaction reservoir and the second reaction reservoir are sequentially communicated, and the outlet of the membrane module is communicated with the diluting mechanism.

Preferably, the top ends and the bottom ends of the plurality of groups of membrane modules are respectively and correspondingly communicated with the first water production pipe through second water production pipes; the cleaning assembly comprises a first sealing plate and a second sealing plate which are fixedly connected to two groups of opposite surfaces on the outer side of the membrane assembly, two groups of driving assemblies are arranged between the first sealing plate and the second sealing plate on two sides, the driving assemblies are arranged at the top and the bottom of the first sealing plate respectively, one of the driving assemblies is fixedly connected with guard plates at the top and the bottom of the first sealing plate respectively, the second sealing plate is connected between the guard plates in a sliding mode, and the guard plates at the bottom of the first sealing plate are communicated with an aeration device.

Preferably, the driving assembly comprises a first fixed block and a second fixed block which are fixedly connected to the outer side walls of the two second sealing plates respectively, a first electric push rod and a second electric push rod which are fixedly connected to the top end of the first sealing plate from top to bottom, and a first connecting rod and a second connecting rod, wherein the top end of the first fixed block is hinged to one end of the first connecting rod, and the other end of the first connecting rod is fixedly connected to the telescopic end of the first electric push rod; the top end of the second fixed block is hinged with one end of the second connecting rod, and the other end of the second connecting rod is fixedly connected with the telescopic end of the second electric push rod; the first fixing block is higher than the second fixing block, and hinged points of the first fixing block and the second fixing block are respectively close to the inner side wall of the first sealing plate.

Preferably, the impurity collecting assembly comprises a second sedimentation tank fixedly connected to the bottom of the second reaction tank, a filter plate is obliquely arranged at the top of the second sedimentation tank, the center of the filter plate is rotatably connected with a stirring blade, and the stirring blade is driven by a fourth servo motor.

Preferably, dilute the mechanism including diluting the pond, dilute and seted up first stirring chamber in the pond, dilute the pond and set up the inboard top of first equalizing basin, the first servo motor of the outside top fixedly connected with of first equalizing basin, first servo motor's rotation axis is vertical in proper order to be run through first equalizing basin with dilute the top of pond, rotation axis circumference equidistant a plurality of group blade subassemblies, it is a plurality of the blade subassembly is located first stirring intracavity.

Preferably, the blade subassembly includes second stirring vane and the third stirring vane of centripetal slope setting, second stirring vane with third stirring vane's inclination is the same.

Preferably, one-level filtering mechanism includes fixed connection and is in the helical tube at the inboard top of second equalizing basin, the inboard diapire of helical tube has set gradually a plurality of grid nets from last to down, and is a plurality of the size of grid net increases in proper order, is located high-end the external diameter of grid net is less than the internal diameter of helical tube, is located the low side the external diameter of grid net equals the internal diameter of helical tube.

Preferably, the secondary filter mechanism is including setting up the second stirring chamber of second equalizing basin bottom, the outlet end of helical pipeline pass through the third water pipe with second stirring chamber intercommunication, the second stirring chamber pass through the fourth water pipe with the inner chamber intercommunication of second equalizing basin, second stirring intracavity level is provided with the (mixing) shaft, the both ends of (mixing) shaft are rotated respectively and are connected in the second equalizing basin, the fixed cover of one end of (mixing) shaft is equipped with helical blade, a plurality of puddlers of equidistant fixedly connected with of other end circumference of (mixing) shaft, the (mixing) shaft passes through the drive of third servo motor, the below intercommunication in second stirring chamber has precipitation unit.

Preferably, the sedimentation unit includes first sedimentation tank, in the first sedimentation tank through the weeping hole with second stirring chamber intercommunication just is located the outside bottom of second equalizing basin, the bottom in second stirring chamber is articulated through the articulated shaft to have the weeping board, the articulated shaft with the weeping board passes through the drive of second servo motor.

Preferably, a plurality of carbon bags are arranged in the filter pipe, a plurality of activated carbon particles are arranged in the carbon bags, the outlet of the filter pipe positioned at the tail end is communicated with the bottom of the inner side of the first reaction tank, and the inlet of the filter pipe positioned at the head end is communicated with the outlet end of the secondary filtering mechanism.

The invention has the following technical effects: the first adjusting tank is mainly used for diluting the waste leachate, the produced water at the outlet of the membrane module and the leachate mixed solution are fully mixed through the diluting mechanism, the diluted leachate is stored in the first solution cavity, and the first solution cavity can ensure the uniformity of the diluted leachate to a certain degree; the second adjusting tank is mainly used for filtering the diluted leachate, the primary filtering mechanism can filter large-particle impurities in the leachate, and the secondary filtering mechanism can further filter the impurities and collect the impurities by adding a flocculating agent; the first reaction tank is mainly used for further purifying the leachate; the leachate can be purified by deep solid-liquid separation, bacterial interception and the like through the membrane module, impurities attached to the surface of the membrane module are periodically cleaned through the cleaning module, the stable use state of the membrane module is ensured, the service life of the membrane module is prolonged, and then the impurities are collected and uniformly treated through the impurity collecting module; under the dilution effect of first equalizing basin, under the filtration effect of second equalizing basin and the purification effect of first reaction tank, can carry out progressively for the leachate in advance to alleviate the work load of membrane module, set up like this, improved the treatment effeciency to the leachate on the one hand, guaranteed the stability of processing procedure on the one hand, on the other hand has improved the life of membrane module, has finally reduced the loss to whole equipment, has reduced the maintenance cost of whole equipment promptly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a processing apparatus according to the present invention;

FIG. 2 is a schematic view of the internal structure of a first conditioning tank according to the present invention;

FIG. 3 is a schematic top view of the dilution mechanism of the present invention;

FIG. 4 is a schematic view of the internal structure of a second conditioning tank according to the present invention;

FIG. 5 is a schematic right-side cross-sectional view of a secondary filter mechanism according to the present invention;

FIG. 6 is a schematic view of the internal structure of a first reaction tank according to the present invention;

FIG. 7 is a schematic view of the internal structure of a second reaction tank according to the present invention;

FIG. 8 is a schematic top view of the cleaning assembly of the present invention;

FIG. 9 is a left side view of the cleaning assembly of the present invention;

FIG. 10 is a right side view of the active device of the present invention;

wherein, 1, a first regulating reservoir; 2. a second regulating reservoir; 3. a first reaction tank; 4. a second reaction tank; 5. a first solution chamber; 6. a first water pipe; 7. a first water pump; 8. a second solution chamber; 9. a leachate pipe; 10. a first servo motor; 11. a first stirring chamber; 12. producing a water branch pipe; 13. a second water pump; 14. a second water pipe; 15. a spray head; 16. a helical conduit; 17. a grid net; 18. a third water pipe; 19. a second stirring chamber; 20. a weep hole; 21. a stirring shaft; 22. a helical blade; 23. a stirring rod; 24. a liquid leakage plate; 25. a first sedimentation tank; 26. a second servo motor; 27. a third servo motor; 28. a fourth water pipe; 29. a third water pump; 30. a filter tube; 31. carbon wrapping; 32. a fourth water pump; 33. a first sealing plate; 34. a filter plate; 35. a second sedimentation tank; 36. a stirring blade; 37. a fourth servo motor; 38. a first water producing pipe; 39. a second water producing pipe; 40. a dilution tank; 41. a second stirring blade; 42. a third stirring blade; 43. hinging a shaft; 44. a second sealing plate; 45. a first fixed block; 46. a second link; 47. a first electric push rod; 48. a guard plate; 49. a first link; 50. a second fixed block; 51. a second electric push rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-10, the invention provides a low-cost treatment device for rural domestic waste leachate, which comprises

The device comprises a first adjusting tank 1, wherein a diluting mechanism is arranged in the first adjusting tank 1, and a first solution cavity 5 for keeping the dilution uniformity of leachate is arranged below the diluting mechanism;

a first-stage filtering mechanism for primarily filtering leachate is arranged in the second adjusting tank 2, and a second-stage filtering mechanism for precipitating the leachate through a flocculating agent is arranged below the first-stage filtering mechanism;

a plurality of filtering pipes 30 which are sequentially communicated end to end are vertically arranged in the first reaction tank 3;

the second reaction tank 4 is internally provided with a plurality of membrane modules and a cleaning module for cleaning the membrane modules, and an impurity collecting module is arranged below the cleaning module;

the first regulating reservoir 1, the second regulating reservoir 2, the first reaction reservoir 3 and the second reaction reservoir 4 are communicated in sequence, and the outlet of the membrane module is communicated with the diluting mechanism.

The first adjusting tank 1 is mainly used for diluting the garbage leachate, fully mixing the produced water at the outlet of the membrane module with leachate mixed solution through a diluting mechanism, and storing the diluted leachate in a first solution cavity 5, wherein the first solution cavity 5 can ensure the uniformity of the diluted leachate to a certain degree; the second adjusting tank 2 mainly has the functions of filtering the diluted leachate, the primary filtering mechanism can filter large-particle impurities in the leachate, and the secondary filtering mechanism can further filter the impurities by adding a flocculating agent and collect the impurities; the primary function of the first reaction tank 3 is to further purify the leachate; the leachate can be purified by deep solid-liquid separation, bacterial interception and the like through the membrane module, impurities attached to the surface of the membrane module are periodically cleaned through the cleaning module, the stable use state of the membrane module is ensured, the service life of the membrane module is prolonged, and then the impurities are collected and uniformly treated through the impurity collecting module; under the dilution effect of first equalizing basin 1, under the filtration effect of second equalizing basin 2 and under the purification effect of first reaction tank 3, can carry out progressively for the leachate in advance to alleviate the work load of membrane module, set up like this, improved the treatment effeciency to the leachate on the one hand, guaranteed the stability of processing procedure on the one hand, on the other hand has improved the life of membrane module, has finally reduced the loss to whole equipment, has reduced the maintenance cost of whole equipment promptly.

In a further optimization scheme, the top ends and the bottom ends of the plurality of groups of membrane modules are respectively and correspondingly communicated with the first water production pipe 38 through the second water production pipe 39; the cleaning assembly comprises two groups of first sealing plates 33 and second sealing plates 44 which are fixedly connected to two opposite surfaces on the outer side of the membrane assembly, two groups of driving assemblies are arranged between the first sealing plates 33 and the second sealing plates 44 on two sides, the two groups of driving assemblies are respectively arranged at the top and the bottom of the first sealing plates 33, the top and the bottom of one first sealing plate 33 are respectively and fixedly connected with guard plates 48, the two second sealing plates 44 are respectively and slidably connected between the two guard plates 48, and the top surfaces of the guard plates 48 at the bottoms of the first sealing plates 33 are communicated with an aeration device (refer to the prior art CN 201511013724.0); the top and bottom centers of the second sealing plate 44 are fixedly connected with spherical sliding blocks (not shown) respectively, and the spherical sliding blocks are slidably connected with the guard plate 48.

When the membrane module normally works, the second sealing plates 44 on the two sides of the membrane module are in an open state to form a certain included angle, and the two second sealing plates 44 can prevent the membrane module from being disturbed by solution when the membrane module normally works, so that the structure of the membrane module is prevented from being damaged; when a large amount of impurities are attached to the surface of the membrane component, two groups of driving components are started simultaneously to drive the two second sealing plates 44 to be in a parallel state, the side face of the membrane component is sealed, and bubbles are beaten on the surface of the membrane component through the aeration device, so that the attached impurities can be cleaned through bubble breakage on one hand, and the water quality can be improved on the other hand; when the two second sealing plates 44 are driven, the spherical slider slides with the protector plate 48.

In a further optimization scheme, the driving assembly comprises a first fixed block 45 and a second fixed block 50 which are fixedly connected to the outer side walls of the two second sealing plates 44 respectively, a first electric push rod 47 and a second electric push rod 51 which are fixedly connected to the top end of the first sealing plate 33 from top to bottom, and a first connecting rod 49 and a second connecting rod 46, wherein the top end of the first fixed block 45 is hinged to one end of the first connecting rod 49, and the other end of the first connecting rod 49 is fixedly connected to the telescopic end of the first electric push rod 47; the top end of the second fixed block 50 is hinged with one end of a second connecting rod 46, and the other end of the second connecting rod 46 is fixedly connected with the telescopic end of a second electric push rod 51; the first fixing block 45 is higher than the second fixing block 50, and hinge points of the first fixing block 45 and the second fixing block 50 are respectively disposed near the inner side wall of the first sealing plate 33.

In an initial state, one sides of the two second sealing plates 44 close to the first fixing block 45 or the second fixing block 50 are in contact arrangement; when the membrane module needs to be cleaned, the first electric push rod 47 and the second electric push rod 51 are started at the same time, the telescopic end of the first electric push rod 47 drives the first connecting rod 49 to move, one second sealing plate 44 is synchronously driven to slide on the guard plate 48 and deflect, the telescopic end of the second electric push rod 51 drives the second connecting rod 46 to move, the other second sealing plate 44 is synchronously driven to slide on the guard plate 48 and deflect, one side of the two second sealing plates 44, which is close to the first fixing block 45 or the second fixing block 50, is gradually separated, the state that the two second sealing plates 44 are arranged in parallel is realized, and the side face of the membrane module is sealed.

Further optimize the scheme, the impurity collection subassembly includes second sedimentation tank 35 of fixed connection in 4 bottoms of second reaction tank, and the top slope of second sedimentation tank 35 is provided with filter 34, and the center of filter 34 is rotated and is connected with stirring vane 36, and stirring vane 36 passes through the drive of fourth servo motor 37.

The impurity suspension that clears up is in the leachate, starts fourth servo motor 37 this moment, drives stirring vane 36 and rotates, and the drive leachate flows in to second sedimentation tank 35, and the leachate that gets into in the second sedimentation tank 35 flows back to second reaction tank 4 through filter 34 again, and filter 34 filters out the impurity that clears up and constantly accumulates in second sedimentation tank 35, realizes the collection of impurity.

Further optimize the scheme, dilute the mechanism including diluting the pond 40, seted up first stirring chamber 11 in diluting the pond 40, dilute the inboard top that pond 40 set up at first equalizing basin 1, the first servo motor 10 of the outside top fixedly connected with of first equalizing basin 1, the rotation axis of first servo motor 10 is vertical in proper order and runs through the top of first equalizing basin 1 with diluting the pond 40, rotation axis circumference equidistant is provided with a plurality of groups blade subassembly, a plurality of blade subassemblies are located first stirring chamber 11.

When the leachate from the leachate pipe 9 is mixed with the produced water of the produced water branch pipe 12 (i.e. the produced water of the membrane module) according to a certain ratio, the first servo motor 10 is started to drive the blade assemblies to rotate, the mixed liquid is stirred, the leachate is diluted more quickly, and the concentration of the diluted leachate reaches 1/10 before dilution.

In a further optimized scheme, the blade assembly comprises a second stirring blade 41 and a third stirring blade 42 which are arranged in a centripetal tilting mode, and the tilting angles of the second stirring blade 41 and the third stirring blade 42 are the same.

When the mixed liquid passes through the second stirring blade 41, the mixed liquid is divided into two parts, most of the mixed liquid flows through between the second stirring blade 41 and the rotating shaft, a small part of the mixed liquid flows through between the second stirring blade 41 and the side wall of the dilution tank 40, then the two parts of the mixed liquid are mixed again before passing through the third stirring blade 42, the small part of the mixed liquid flows through between the third stirring blade 42 and the rotating shaft, and most of the mixed liquid flows through between the third stirring blade 42 and the side wall of the dilution tank 40; the leachate and the produced water can be fully mixed by repeatedly stirring, and finally the aim of uniform dilution is achieved.

According to the further optimization scheme, a second solution cavity 8 is formed between the outer side wall of the dilution pool 40 and the inner side wall of the first adjusting pool 1, a first solution cavity 5 is arranged below the dilution pool 40 and the second solution cavity 8, the interior of the dilution pool 40 is communicated with the second solution cavity 8, and the second solution cavity 8 is communicated with the first solution cavity 5 through a first water pump 7; the bottom of the inner side of the first solution cavity 5 is vertically and fixedly connected with a second water pipe 14, the water outlet end of the first water pump 7 is communicated with a spray head 15 through a first water pipe 6, the spray head 15 is correspondingly arranged below the second water pipe 14, and the first adjusting tank 1 is communicated with the first stirring cavity 11 through a second water pump 13.

The diluted leachate firstly enters the second solution cavity 8 for transition, so that the solution amount in the first solution cavity 5 can be effectively controlled; carry the leachate after diluting to first solution chamber 5 in through first water pump 7, the leachate is from the shower nozzle 15 after the blowout most direct second water pipe 14 entering low side of following to from the 14 high-end outflow of second water pipe, in getting into first solution chamber 5, set up the degree of consistency that can guarantee to a certain extent after the leachate dilution in first solution chamber 5 like this.

Further optimize the scheme, the one-level filtering mechanism includes that fixed connection is at the helical tube 16 at 2 inboard tops of second equalizing basin, and 16 inboard diapalls of helical tube have set gradually a plurality of grid nets 17 from last to down, and the size of a plurality of grid nets 17 increases in proper order, and the external diameter that is located high-end grid net 17 is less than helical tube 16's internal diameter, and the external diameter that is located low-end grid net 17 equals helical tube 16's internal diameter.

The diluted leachate enters from a high-end inlet of the spiral pipeline 16, is gradually filtered by a plurality of grid meshes 17 and then flows into a secondary filtering mechanism; the sizes of the plurality of grid nets 17 are sequentially increased, and after a large amount of large-particle impurities are accumulated in the small-size grid net 17 positioned at the high end, the leachate passes through the upper part of the grid net 17 and continues to pass through the grid net 17 at the low end, so that on one hand, the flow of the leachate can be prevented from being influenced, and on the other hand, the unfiltered leachate can be prevented from flowing into the secondary filtering mechanism; when the surfaces of all the grid nets 17 at the high end are attached by a large amount of impurities, leachate can only pass through the grid net 17 at the tail end, the filtration state of the grid net 17 can be judged according to the resistance generated by the leachate in the spiral pipeline 16, and then the grid net 17 is replaced or cleaned.

According to a further optimization scheme, the secondary filtering mechanism comprises a second stirring cavity 19 arranged at the bottom of the second adjusting tank 2, the outlet end of the spiral pipeline 16 is communicated with the second stirring cavity 19 through a third water pipe 18, the second stirring cavity 19 is communicated with the inner cavity of the second adjusting tank 2 through a fourth water pipe 28, a stirring shaft 21 is horizontally arranged in the second stirring cavity 19, two ends of the stirring shaft 21 are respectively and rotatably connected in the second adjusting tank 2, a spiral blade 22 is fixedly sleeved at one end of the stirring shaft 21, a plurality of stirring rods 23 are fixedly connected at equal intervals in the circumferential direction at the other end of the stirring shaft 21, the stirring shaft 21 is driven by a third servo motor 27, and a precipitation unit is communicated below the second stirring cavity 19; the water outlet end of the third water pipe 18 is arranged close to the helical blades 22, and the water inlet end of the fourth water pipe 28 is arranged close to the centripetal ends of the stirring rods 23.

The filtered leachate flows into the second stirring cavity 19 from the third water pipe 18, a flocculating agent is added into the third water pipe 18, and after a mixed solution of the flocculating agent and the leachate enters the second stirring cavity 19, the flocculating agent and the leachate are quickly and fully mixed under the stirring action and the pushing action of the spiral blades 22; the coagulated impurities and the leachate generate centrifugal force under the stirring action of the stirring rods 23, and impurities with large mass are accumulated at the centrifugal end of the stirring rod 23; and when the impurities are accumulated in a certain amount, precipitating and collecting the impurities by a precipitation unit.

Further optimize the scheme, the precipitation unit includes first sedimentation tank 25, through weeping hole 20 and second stirring chamber 19 intercommunication and be located the outside bottom of second equalizing basin 2 in the first sedimentation tank 25, the bottom of second stirring chamber 19 is articulated through articulated shaft 43 has weeping board 24, articulated shaft 43 and weeping board 24 pass through the drive of second servo motor 26.

After impurity accumulation is enough a certain amount, start second servo motor 26, drive hourglass liquid board 24 and rotate certain angle around articulated shaft 43, make and move into first sedimentation tank 25 to the impurity that second stirring chamber 19 bottom enters into to deposit in first sedimentation tank 25, thereby realize collecting the mesh of deposiing impurity.

According to the further optimization scheme, a plurality of carbon bags 31 are arranged in the filter pipe 30, a plurality of activated carbon particles are arranged in the carbon bags 31, the outlet of the filter pipe 30 located at the tail end is communicated with the bottom of the inner side of the first reaction tank 3, and the inlet of the filter pipe 30 located at the head end is communicated with the outlet end of the secondary filtering mechanism.

The activated carbon particles are adopted, on one hand, the cost of the activated carbon particles is lower than that of the activated carbon powder, and although the adsorption effect of the activated carbon powder is better than that of the particles, the activated carbon powder is difficult to collect, and on the contrary, the workload of a membrane component is increased, the treatment efficiency of the whole equipment is influenced, and the maintenance cost of the equipment is increased; meanwhile, a disinfectant can be reasonably added into the first reaction tank 3, so that the working load of the membrane module is reduced.

In a further optimized scheme, the membrane module comprises a plurality of spirally rising hollow fiber membranes (not shown in the figure), the plurality of hollow fiber membranes are fixedly connected between the two guard plates 48, and the plurality of hollow fiber membranes are respectively communicated with the second water production pipe 39 and the first water production pipe 38.

The spiral hollow fiber membrane can increase the filtration area of the membrane in a limited space, and meanwhile, a large number of spiral hollow fiber membranes can enhance the mechanical strength of the whole membrane module, thereby effectively avoiding the membrane module from being damaged under the disturbance of leachate for a long time.

The working process of the embodiment is as follows: liquid level sensors are arranged in the first adjusting tank 1, the second adjusting tank 2, the first reaction tank 3 and the second reaction tank 4; the liquid level sensor, the first water pump 7, the second water pump 13, the third water pump 29 and the fourth water pump 32 are electrically connected with a PLC controller; in the working process, the PLC respectively converts the liquid level signals into starting signals or stopping signals according to the received different liquid level sensor sensing signals, and then respectively and correspondingly sends the starting signals or the stopping signals to the first water pump 7, the second water pump 13, the third water pump 29 and the fourth water pump 32; the control mode and the control process of the PLC controller are the prior art.

Simultaneously starting a second water pump 13, a third water pump 29 and a fourth water pump 32 to sequentially input leachate of the first regulating reservoir 1, the second regulating reservoir 2 and the first reaction reservoir 3 into the second reaction reservoir 4; under the state that the first water pump 7 is started, when the liquid level in the first regulating reservoir 1 is higher than 70%, the first water pump 7 continues to operate, the diluted leachate is input into the first solution cavity 5, and when the liquid level in the first regulating reservoir 1 is higher than 85%, the solution is stopped from being continuously input into the first solution cavity 5; under the state that the second water pump 13 is started, when the liquid level in the second regulating reservoir 2 is higher than 70%, the second water pump 13 continues to operate, diluted leachate is input into the second regulating reservoir 2, and when the liquid level in the second regulating reservoir 2 is higher than 85%, the solution is stopped from being continuously input into the second regulating reservoir 2; under the state that the third water pump 29 is started, when the liquid level in the first reaction tank 3 is higher than 70%, the third water pump 29 continues to operate, the filtered leachate is input into the first reaction tank 3, and when the liquid level in the first reaction tank 3 is higher than 85%, the solution is stopped from being continuously input into the first reaction tank 3; under the state that the fourth water pump 32 is started, when the liquid level in the second reaction tank 4 is higher than 70%, the fourth water pump 32 continues to operate, the filtered leachate is input into the second reaction tank 4, when the liquid level in the second reaction tank 4 is higher than 72%, the leachate can be output outwards, and when the liquid level in the second reaction tank 4 is higher than 85%, the solution is stopped to be continuously input into the second reaction tank 4; when the liquid level in the second reaction tank 4 is lower than 70%, the outward output is stopped.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. A rural domestic waste leachate low-cost treatment equipment is characterized in that: comprises that

The leachate treatment device comprises a first adjusting tank (1), wherein a diluting mechanism is arranged in the first adjusting tank (1), and a first solution cavity (5) for keeping the dilution uniformity of leachate is arranged below the diluting mechanism;

a first-stage filtering mechanism for primarily filtering the leachate is arranged in the second adjusting tank (2), and a second-stage filtering mechanism for precipitating the leachate through a flocculating agent is arranged below the first-stage filtering mechanism;

the device comprises a first reaction tank (3), wherein a plurality of filter pipes (30) which are sequentially communicated end to end are vertically arranged in the first reaction tank (3);

the device comprises a second reaction tank (4), wherein a plurality of membrane modules are arranged in the second reaction tank (4), a cleaning component for cleaning the membrane modules is also arranged in the second reaction tank, and an impurity collecting component is arranged below the cleaning component;

the first adjusting tank (1), the second adjusting tank (2), the first reaction tank (3) and the second reaction tank (4) are sequentially communicated, and the outlet of the membrane module is communicated with the diluting mechanism.

2. The rural domestic waste leachate low-cost treatment apparatus of claim 1, wherein: the top ends and the bottom ends of the plurality of groups of membrane modules are respectively and correspondingly communicated with the first water production pipe (38) through a second water production pipe (39); the cleaning assembly comprises a first sealing plate (33) and a second sealing plate (44) which are fixedly connected to two groups of opposite surfaces on the outer side of the membrane assembly, two groups of driving assemblies are arranged between the first sealing plate (33) and the second sealing plate (44) on two sides and are respectively arranged at the top and the bottom of the first sealing plate (33), one of the driving assemblies is fixedly connected with guard plates (48) at the top and the bottom of the first sealing plate (33), the two second sealing plates (44) are respectively connected between the two guard plates (48) in a sliding mode, and the top surface of the guard plate (48) at the bottom of the first sealing plate (33) is communicated with an aeration device.

3. The rural domestic waste leachate low-cost treatment equipment according to claim 2, characterized in that: the driving assembly comprises a first fixing block (45) and a second fixing block (50) which are fixedly connected to the outer side walls of the two second sealing plates (44) respectively, a first electric push rod (47) and a second electric push rod (51) which are sequentially and fixedly connected to the top end of the first sealing plate (33) from top to bottom, and a first connecting rod (49) and a second connecting rod (46), wherein the top end of the first fixing block (45) is hinged to one end of the first connecting rod (49), and the other end of the first connecting rod (49) is fixedly connected to the telescopic end of the first electric push rod (47); the top end of the second fixed block (50) is hinged with one end of the second connecting rod (46), and the other end of the second connecting rod (46) is fixedly connected to the telescopic end of the second electric push rod (51); the first fixing block (45) is higher than the second fixing block (50), and hinged points of the first fixing block (45) and the second fixing block (50) are respectively close to the inner side wall of the first sealing plate (33).

4. The rural domestic waste leachate low-cost treatment equipment according to claim 3, characterized in that: the impurity collecting assembly comprises a second sedimentation tank (35) fixedly connected to the bottom of the second reaction tank (4), a filter plate (34) is obliquely arranged at the top of the second sedimentation tank (35), the center of the filter plate (34) is rotatably connected with a stirring blade (36), and the stirring blade (36) is driven by a fourth servo motor (37).

5. The rural domestic waste leachate low-cost treatment equipment according to claim 1, characterized in that: dilute the mechanism and include dilution tank (40), set up first stirring chamber (11) in dilution tank (40), dilution tank (40) set up the inboard top of first equalizing basin (1), the first servo motor (10) of outside top fixedly connected with of first equalizing basin (1), the rotation axis of first servo motor (10) is vertical in proper order to be run through first equalizing basin (1) with the top of dilution tank (40), rotation axis circumference equidistant is provided with a plurality of group's blade subassembly, and is a plurality of the blade subassembly is located in first stirring chamber (11).

6. The rural domestic waste leachate low-cost treatment equipment according to claim 5, characterized in that: the blade subassembly includes second stirring vane (41) and third stirring vane (42) of centripetal slope setting, second stirring vane (41) with the inclination of third stirring vane (42) is the same.

7. The rural domestic waste leachate low-cost treatment apparatus of claim 1, wherein: one-level filtering mechanism includes fixed connection and is in helical tube (16) at the inboard top of second equalizing basin (2), helical tube (16) inboard diapire is from last to having set gradually a plurality of grid nets (17) down, and is a plurality of the size of grid net (17) increases in proper order, is located high-end the external diameter of grid net (17) is less than the internal diameter of helical tube (16), is located the low side the external diameter of grid net (17) equals the internal diameter of helical tube (16).

8. The rural domestic waste leachate low-cost treatment apparatus of claim 7, wherein: the secondary filtering mechanism comprises a second stirring cavity (19) arranged at the bottom of the second regulating tank (2), the outlet end of the spiral pipeline (16) is communicated with the second stirring cavity (19) through a third water pipe (18), the second stirring cavity (19) is communicated with the inner cavity of the second regulating pool (2) through a fourth water pipe (28), a stirring shaft (21) is horizontally arranged in the second stirring cavity (19), two ends of the stirring shaft (21) are respectively and rotatably connected in the second regulating reservoir (2), one end of the stirring shaft (21) is fixedly sleeved with a helical blade (22), the other end of the stirring shaft (21) is fixedly connected with a plurality of stirring rods (23) at equal intervals in the circumferential direction, the stirring shaft (21) is driven by a third servo motor (27), and a precipitation unit is communicated below the second stirring cavity (19).

9. The rural domestic waste leachate low-cost treatment apparatus of claim 8, wherein: the sedimentation unit comprises a first sedimentation tank (25), the first sedimentation tank (25) is internally communicated with a second stirring cavity (19) through a liquid leakage hole (20) and is positioned at the bottom of the outer side of the second regulating tank (2), the bottom of the second stirring cavity (19) is hinged with a liquid leakage plate (24) through a hinge shaft (43), and the hinge shaft (43) and the liquid leakage plate (24) are driven by a second servo motor (26).

10. The rural domestic waste leachate low-cost treatment apparatus of claim 1, wherein: be provided with a plurality of charcoal bags (31) in filter tube (30), be provided with a plurality of active carbon particles in charcoal bag (31), be located terminal the export of filter tube (30) with the inboard bottom intercommunication of first reaction tank (3), be located the head end the import of filter tube (30) with the exit end intercommunication of second grade filter equipment.