CN214167701U

CN214167701U - High-efficient MBR biological treatment system of landfill leachate

Info

Publication number: CN214167701U
Application number: CN202022575440.3U
Authority: CN
Inventors: 杨琴; 冯梅; 钟正君; 杨鹏; 宋杨晧; 裴超武; 李享; 贾超; 汪跃飞; 田亚洲; 王启超; 王冬根; 刘润芃; 刘强; 赵云龙
Original assignee: China Railway Erju Co Ltd; Shenzhen China Railway Second Bureau Engineering Co Ltd
Current assignee: China Railway Erju Co Ltd; Shenzhen China Railway Second Bureau Engineering Co Ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-09-10
Anticipated expiration: 2030-11-09

Abstract

The utility model relates to a high-efficient MBR biological treatment system of landfill leachate, it includes the reaction tank, be provided with the membrane module in the reaction tank, the membrane module is including fixed frame and MBR membrane, the MBR membrane is provided with a plurality ofly to with fixed frame fixed connection, parallel arrangement between the adjacent MBR membrane, one side that the membrane module deviates from leachate flow direction is provided with the filter wall, has seted up a plurality of on the filter wall and has filtered the hole, be provided with between the adjacent MBR membrane and wash the subassembly. The application has the effect of reducing the attachment of sludge on the MBR membrane, thereby increasing the flux of the percolate on the MBR membrane.

Description

High-efficient MBR biological treatment system of landfill leachate

Technical Field

The application relates to the field of biochemical treatment processes of landfill leachate, in particular to a high-efficiency MBR biological treatment system for landfill leachate.

Background

The landfill leachate belongs to high-concentration organic wastewater, the water quality and the water quantity of the landfill leachate are influenced by various factors such as the type of the garbage, the local environment, the precipitation quantity, the volume of a landfill site, the landfill time and the like, the change is large, particularly, the ammonia nitrogen concentration gradually rises along with the extension of the landfill time, the C/N ratio is gradually disordered, and the biological denitrification is very difficult. However, as the national environment protection work is increasingly emphasized, the discharge standard of leachate treatment effluent is increasingly strict.

At present, the mainstream treatment process of domestic landfill leachate adopts 'MBR + NF + RO', wherein an MBR membrane bioreactor is a novel state wastewater treatment system organically combining a membrane separation technology and a biological treatment technology, a membrane component is used for replacing a secondary sedimentation tank at the tail end of the traditional biological treatment technology, the concentration of high-activity sludge is kept in the bioreactor, the organic load of biological treatment is improved, the floor area of a sewage treatment facility is reduced, the amount of residual sludge is reduced by keeping low sludge load, and active sludge and macromolecular organic matters in water are mainly intercepted by utilizing membrane separation equipment.

In view of the above-mentioned related technologies, the inventor believes that in the MBR process in the prior art, sludge is directly filtered by an MBR membrane, and a large amount of sludge is attached to the membrane module and is not easy to clean, so that pores on the surface of the MBR membrane are blocked, and the flow rate of leachate treated on the MBR membrane per unit time is severely reduced.

SUMMERY OF THE UTILITY MODEL

In order to reduce the attachment of sludge on an MBR membrane and increase the flow rate of leachate treated by the MBR membrane in unit time, the application provides a high-efficiency MBR biological treatment system for landfill leachate.

The application provides a high-efficient MBR biological treatment system of landfill leachate adopts following technical scheme:

the utility model provides a high-efficient MBR biological treatment system of landfill leachate, includes the reaction tank, is provided with the membrane module in the reaction tank, and the membrane module is including fixed frame and MBR membrane, and the MBR membrane is provided with a plurality ofly to with fixed frame fixed connection, parallel arrangement between the adjacent MBR membrane, one side that the membrane module deviates from leachate flow direction is provided with the filter wall, has seted up a plurality of on the filter wall and has filtered the hole, is provided with between the adjacent MBR membrane and washs the subassembly.

Through adopting above-mentioned technical scheme, landfill leachate gets into can contact earlier the filter wall in the reaction tank, the filter wall can have the effect of blockking to the mud in the landfill leachate, make the mud in the landfill leachate have partly downward deposit, reduce the mud content of landfill leachate when MBR membrane department, thereby reduce the pressure of mud in the MBR membrane treatment landfill leachate, it can wash the MBR membrane to wash the subassembly, reduce the adhesion of the epaxial mud of MBR membrane, thereby increase the flow of MBR membrane treatment leachate in the unit interval.

Preferably, a plurality of retention holes are formed in one side face, deviating from the flowing direction of the percolate, of the filter wall, the retention holes correspond to the filter holes one to one, and the retention holes are communicated with the filter holes.

Through adopting above-mentioned technical scheme, because nitrosation fungus and nitrobacteria can exist in the mud and carry out the nitration to rubbish filtrate, set up the hole that detains and can make the mud among the landfill leachate be detained in the hole that detains, when rubbish filtrate through detaining the hole, nitrosation fungus and nitrobacteria in the hole that detains nitrify the rubbish filtrate, the setting of detaining the hole is favorable to the longer nitrosation fungus of generation phase and nitrobacteria to be kept in the reactor, make the ammonia nitrogen among the landfill leachate obtain more abundant nitration, thereby improve the cleanliness factor that the landfill leachate was handled to the reaction tank.

Preferably, be provided with on the membrane module and wash the subassembly, wash the subassembly and be provided with a plurality ofly, set up respectively between adjacent MBR membrane, wash the subassembly and include fixed plate, cleaning brush and driving piece, the fixed plate setting is between adjacent MBR membrane, fixed plate and MBR membrane parallel arrangement, cleaning brush and fixed plate side fixed connection, the surface butt of cleaning brush and MBR membrane, the driving piece is used for driving the fixed plate and moves upwards or downwards.

Through adopting above-mentioned technical scheme, start the driving piece, make the fixed plate reciprocate to brush the MBR membrane about making the cleaning brush, the setting of cleaning brush both can brush the epimembranal mud of pasting of MBR, can make rubbish filtrate and MBR membrane fully contact again, thereby reduce the epimembranal adhesion of mud of MBR, improve the filter capacity of MBR membrane, increase the flow of MBR membrane treatment filtration liquid in the unit interval.

Preferably, the number of the cleaning brushes is two, and the two cleaning brushes are fixedly connected with the two side surfaces of the fixing plate respectively.

Through adopting above-mentioned technical scheme, because the distance between the adjacent MBR membrane is less, equal fixed connection cleaning brush on two sides of fixed plate, the fixed plate upwards or the in-process that moves down under the effect of driving piece, two cleaning brushes can brush adjacent MBR membrane side simultaneously, reduce the frequency that the cleaning brush brushed, increase the speed of getting rid of the epimembranal mud of MBR to reduce the adhesion of epimembranal mud of MBR, increase the flow that the filtration liquid was handled to the MBR membrane in the unit interval.

Preferably, the driving piece is a lead screw, a driving assembly is connected to the lead screw, the driving assembly comprises a worm and a turbine, a rotating piece used for rotating the worm is connected to the worm, the turbine is provided with a plurality of parts, the turbine is matched with the worm for use, the turbine corresponds to the lead screw one to one, and the turbine is in threaded connection with the lead screw.

Through adopting above-mentioned technical scheme, rotate the piece and drive the scroll bar and take place to rotate, the scroll bar can drive the turbine and take place to rotate to drive the lead screw and rotate, the lead screw can drive the fixed plate and upwards or move down, driving motor, scroll bar and turbine's setting has realized the synchronous rotation of a plurality of lead screws, thereby makes a plurality of cleaning brushes upwards or move down in step, washs different MBR membrane surfaces simultaneously.

Preferably, the cleaning assemblies are arranged in a plurality of groups along the horizontal direction, and the distribution direction of the cleaning assemblies is vertical to the flowing direction of the percolate.

Through adopting above-mentioned technical scheme, because the width of MBR membrane is great, set up a cleaning brush and scrub the MBR membrane, work efficiency is slower, sets up multiunit drive assembly along the vertical direction of MBR membrane distribution direction, makes a plurality of cleaning brushes brush same MBR membrane, improves the abluent rate of mud on the MBR membrane to increase the flow that the filtration liquid was handled to the MBR membrane in the unit interval.

Preferably, the drive assembly is connected with the interlock subassembly, and the interlock subassembly includes synchronizing wheel and hold-in range, and the synchronizing wheel is provided with a plurality ofly, synchronizing wheel and scroll bar one-to-one, synchronizing wheel and the coaxial fixed connection of scroll bar, and the hold-in range is connected between the synchronizing wheel, and the synchronizing wheel uses with the hold-in range cooperation.

Through adopting above-mentioned technical scheme, start driving motor, driving motor can drive the synchronizing wheel on it and take place to rotate, under the effect of hold-in range, a plurality of synchronizing wheel synchronous rotation, thereby make a plurality of scroll bar synchronous rotation, a plurality of scroll bars drive a plurality of turbine synchronous rotation, make the synchronous upwards or the decurrent mud that washs the MBR membrane of multiunit cleaning brush, the setting of synchronizing wheel and hold-in range, the simultaneous movement of multiunit cleaning assembly has been realized, thereby increase the speed of wasing the MBR membrane and go up mud, the flow of filtration liquid is handled to the MBR membrane in the increase unit interval.

Preferably, the bottom of the membrane component is fixedly provided with a sludge tank, the top surface of the sludge tank is provided with a mounting plate, and the sludge tank is connected with a sludge pump.

Through adopting above-mentioned technical scheme, the mud that the filter wall held back down and the mud that washs down on the MBR membrane all can flow to the sludge impoundment along the down-hole on the mounting panel in, and the mud in with the sludge impoundment is discharged by the mud pump again, clears up the mud in the sludge impoundment.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the arrangement of the filter wall, the filter holes and the cleaning component can reduce the sludge content of the garbage percolate passing through the MBR membrane, thereby reducing the attachment of sludge on the MBR membrane and increasing the flow of the MBR membrane for treating the percolate in unit time;

2. the arrangement of the retention holes is beneficial to retention of nitrosobacteria and nitrobacteria with longer generation period in the reactor, so that ammonia nitrogen in the landfill leachate is sufficiently nitrified, and the cleanliness of the landfill leachate treated by the reaction tank is improved;

3. the setting of fixed plate, cleaning brush and driving piece can wash the epimembranal mud of MBR to reduce the adnexed of the epimembranal mud of MBR, thereby increase the flow that the filtration liquid was handled to the MBR membrane in the unit interval.

Drawings

FIG. 1 is a schematic structural diagram of the present application;

FIG. 2 is an exploded view for explaining the internal structure of the reaction cell;

fig. 3 is a partial sectional view intended to illustrate a filter wall;

FIG. 4 is a schematic view intended to illustrate a partial structure of a membrane module;

fig. 5 is a partial structural view intended to explain the cleaning assembly.

Description of reference numerals: 1. a reaction tank; 11. a water inlet pump; 12. discharging the water pump; 2. a membrane module; 21. a fixing frame; 22. MBR membrane; 3. a filter wall; 31. a filtration pore; 32. reserving a hole; 4. a mounting frame; 5. a drive assembly; 51. a scroll bar; 511. a drive motor; 52. a turbine; 6. a linkage assembly; 61. a synchronizing wheel; 62. a synchronous belt; 7. cleaning the assembly; 71. a lead screw; 72. a fixing plate; 73. cleaning brushes; 8. a sludge tank; 81. mounting a plate; 811. a lower counter bore; 82. a mud pump.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a high-efficiency MBR biological treatment system for leachate in a refuse dump. Referring to fig. 1, the high-efficiency MBR biological treatment system for leachate in a refuse dump comprises a reaction tank 1, wherein a membrane module 2 and a filter wall 3 are arranged in the reaction tank 1, and a cleaning module 7 is arranged on the membrane module 2.

When the landfill leachate is filtered, the landfill leachate is filtered by the filter wall 3 and the membrane component 2 in sequence, and the filter wall 3 and the membrane component 2 intercept sludge in the landfill leachate and finally discharge the sludge out of the reaction tank 1.

Referring to fig. 2, the reaction tank 1 is a cuboid, the two opposite side surfaces of the reaction tank 1 are respectively connected with a water inlet pump 11 and a water outlet pump 12, the outlet end of the water inlet pump 11 is communicated with the reaction tank 1 through a pipeline, and the inlet end of the water outlet pump 12 is communicated with the reaction tank 1 through a pipeline. A sludge tank 8 is arranged under the reaction tank 1, the sludge tank 8 is in a square frustum shape, and the top end of the sludge tank 8 is communicated with the bottom end of the reaction tank 1. The horizontal mounting plate 81 is fixedly connected in the reaction tank 1, the mounting plate 81 is arranged on the bottom surface of the reaction tank 1, and a distance is reserved between one side of the mounting plate 81, which is close to the water inlet pump, and the inner wall of the reaction tank 1. A sludge pump 82 is fixedly connected outside the sludge pool 8, and the inlet end of the sludge pump 82 is communicated with the sludge pool 8 through a pipeline.

Carry landfill leachate to reaction tank 1 through intake pump 11, through reaction tank 1's filtration, have a large amount of mud to be held back, hold back the mud that gets off and flow to in sludge impoundment 8, then outside mud discharge sludge impoundment 8 with mud pump 82 in with sludge impoundment 8, carry the leachate after filtering to next process with water pump 12.

Referring to fig. 2 and 3, the filter wall 3 is vertically disposed at one side close to the water inlet pump 11, the bottom end of the filter wall 3 is fixedly connected with the mounting plate 81, and the filter wall 3 is perpendicular to the flowing direction of the percolate and is fixedly connected with the reaction tank 1. The filter wall 3 is provided with a plurality of filter holes 31 and detention holes 32, the filter holes 31 and the detention holes 32 are arranged, the plurality of filter holes 31 are uniformly distributed on the filter wall 3, and the detention holes 32 are in one-to-one correspondence with the filter holes 31; the cross section of the filtering hole 31 is circular, the filtering hole 31 is arranged on the side of the filtering wall 3 far away from the water inlet pump 11, the cross section of the detention hole 32 is square, the detention hole 32 is arranged on the side of the filtering wall 3 near the water inlet pump 11, the cross section area of the detention hole 32 is larger than that of the filtering hole 31, and the filtering hole 31 is communicated with the detention hole 32.

The landfill leachate conveyed to the reaction tank 1 sequentially passes through the retention holes 32 and the filtering holes 31 and flows to one side of the filtering wall 3 far away from the water inlet pump 11, and part of sludge in the landfill leachate is intercepted at one side of the filtering wall 3 close to the water inlet pump 11, so that the sludge content in the landfill leachate is reduced, and the pressure of the subsequent membrane module 2 for filtering the landfill leachate sludge is reduced.

Referring to fig. 2 and 4, the membrane module 2 is disposed directly above the mounting plate 81, the membrane module 2 includes a fixing frame 21 and an MBR membrane 22, the fixing frame 21 is disposed in the reaction tank 1, the bottom end of the fixing frame 21 is fixedly connected to the mounting plate 81, the MBR membrane 22 is rectangular, the MBR membrane 22 is disposed in a plurality along the flow direction of the percolate, and the plurality of MBR membranes 22 are all disposed in parallel, and the MBR membrane 22 is fixedly connected to the fixing frame 21. In the sewage treatment, the sewage passes through the MBR membrane 22 to be filtered.

Referring to fig. 4 and 5, the fixing frame 21 is fixedly connected with three mounting frames 4, the mounting frames 4 are arranged right above the fixing frame 21, the number of the mounting frames 4 is three, and the distribution direction of the three mounting frames is perpendicular to the flowing direction of the percolate. Be connected with drive assembly 5 on the mounting bracket 4, drive assembly 5 is provided with the multiunit, and in this embodiment, drive assembly 5 is provided with three groups, and drive assembly 5 includes scroll 51 and turbine 52, and scroll 51's length direction is the same with the flow direction of filtration liquid, and scroll 51 length direction's both ends all are rotated with mounting bracket 4 and are connected, and turbine 52 can be provided with a plurality ofly, and in this embodiment, turbine 52 is provided with five, and all uses with scroll 51 cooperation, and turbine 52 rotates with mounting bracket 4 and is connected.

Referring to fig. 4 and 5, the scroll rods 51 are connected with the linkage assembly 6, the linkage assembly 6 includes three synchronizing wheels 61 and three timing belts 62, in this embodiment, the three synchronizing wheels 61 are respectively and fixedly connected with the three scroll rods 51 coaxially, and the timing belts 62 are horizontally connected between the three synchronizing wheels 61 and are used in cooperation with the synchronizing wheels 61. One of the scroll rods 51 is connected to a rotating member, which in this embodiment is a driving motor 511, and the driving motor 511 is coaxially and fixedly connected thereto.

Referring to fig. 4 and 5, in the present embodiment, fifteen sets of cleaning assemblies 7 are provided, which correspond to fifteen turbines 52 one-to-one, respectively, each cleaning assembly 7 includes a driving member, a fixing plate 72 and a cleaning brush 73, in the present embodiment, the driving member is a lead screw 71, the lead screw 71 is vertically disposed, the lead screw 71 is coaxially and threadedly connected to the turbine 52, the fixing plate 72 is vertically disposed, the fixing plate 72 is disposed parallel to the MBR membrane 22, the fixing plate 72 is fixedly connected to the bottom end of the lead screw 71, two cleaning brushes 73 are provided, which are fixedly connected to the side surfaces of the fixing plate 72, respectively, and the cleaning brush.

When the device is used, the driving motor 511 is started, the driving motor 511 drives the scroll rod 51 connected with the driving motor 511 to rotate, the scroll rod 51 with the driving motor 511 can drive the fixed wheel on the scroll rod to rotate, other two fixed wheels rotate under the action of the belt, so as to drive other two scroll rods 51 to rotate, the scroll rod 51 drives the turbine 52 to rotate, the turbine 52 of the turbine 52 drives the screw rod 71 to move upwards or downwards, so that the fixed plate 72 moves upwards or downwards, the cleaning brush 73 brushes the surface of the MBR membrane 22, brushes off sludge on the MBR membrane 22, reduces the attachment of sludge on the MBR membrane 22, and thus increases the flow rate of percolate treated by the MBR membrane 22 in unit time.

The implementation principle of the high-efficiency MBR biological treatment system for the leachate in the refuse dump in the embodiment of the application is as follows: when the garbage penetrating fluid is conveyed into the reaction tank 1, the garbage penetrating fluid passes through the retention holes 32 and the filtering holes 31 in sequence, the filtering wall 3 can intercept a part of sludge in the garbage penetrating fluid, so that the content of the sludge in the garbage penetrating fluid is reduced, the pressure and the quantity of the intercepted sludge of the garbage penetrating fluid filtered by the MBR membrane 22 are reduced, and the flow of the leachate treated by the MBR membrane 22 in unit time is increased.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a high-efficient MBR biological treatment system of landfill leachate which characterized in that: the filter membrane comprises a reaction tank (1), wherein a membrane assembly (2) is arranged in the reaction tank (1), the membrane assembly (2) comprises a fixing frame (21) and MBR membranes (22), the MBR membranes (22) are provided with a plurality of fixing frames (21) and are fixedly connected with the fixing frame (21), the adjacent MBR membranes (22) are arranged in parallel, one side of the membrane assembly (2) departing from the flowing direction of percolate is provided with a filter wall (3), the filter wall (3) is provided with a plurality of filter holes (31), and a cleaning assembly (7) is arranged between the adjacent MBR membranes (22).

2. The efficient MBR biological treatment system for leachate in a landfill site of claim 1, wherein: a plurality of stagnation holes (32) are formed in one side face, deviating from the flowing direction of percolate, of the filter wall (3), the stagnation holes (32) correspond to the filter holes (31) one to one, and the stagnation holes (32) are communicated with the filter holes (31).

3. The efficient MBR biological treatment system for leachate in a landfill site of claim 1, wherein: the cleaning assembly (7) comprises a fixing plate (72), a cleaning brush (73) and a driving piece, wherein the fixing plate (72) is arranged between adjacent MBR membranes (22), the fixing plate (72) is arranged in parallel with the MBR membranes (22), the cleaning brush (73) is fixedly connected with the side face of the fixing plate (72), the surface of the cleaning brush (73) is abutted to the surface of the MBR membranes (22), and the driving piece is used for driving the fixing plate (72) to move upwards or downwards.

4. The MBR biological treatment system for the landfill leachate of claim 3, wherein: and two cleaning brushes (73) are arranged and are respectively and fixedly connected with two side surfaces of the fixing plate (72).

5. The MBR biological treatment system for the landfill leachate of claim 3, wherein: the driving piece is a lead screw (71), a driving assembly (5) is connected to the lead screw (71), the driving assembly (5) comprises a worm (51) and a turbine (52), a rotating piece used for rotating the worm is connected to the worm (51), the turbine (52) is provided with a plurality of turbines, the turbines (52) are matched with the worm (51) for use, the turbines (52) correspond to the lead screw (71) one by one, and the turbines (52) are in threaded connection with the lead screw (71).

6. The MBR biological treatment system for the landfill leachate of claim 5, wherein: the cleaning assemblies (7) are provided with a plurality of groups along the horizontal direction, and the distribution direction of the cleaning assemblies (7) is vertical to the flowing direction of the percolate.

7. The MBR biological treatment system for the landfill leachate of claim 6, wherein: the linkage assembly (6) is connected to the driving assembly (5), the linkage assembly (6) comprises a plurality of synchronizing wheels (61) and synchronous belts (62), the synchronizing wheels (61) are in one-to-one correspondence with the scroll rods (51), the synchronizing wheels (61) are fixedly connected with the scroll rods (51) in a coaxial mode, the synchronous belts (62) are connected between the synchronizing wheels (61), and the synchronizing wheels (61) are matched with the synchronous belts (62) for use.

8. The efficient MBR biological treatment system for leachate in a landfill site of claim 1, wherein: the membrane component is characterized in that a sludge tank (8) is fixedly arranged at the bottom of the membrane component (2), a mounting plate (81) is arranged on the top surface of the sludge tank (8), and a sludge pump (82) is connected to the sludge tank (8).