CN113860500B

CN113860500B - Hospital sewage treatment system based on MBR

Info

Publication number: CN113860500B
Application number: CN202111234930.XA
Authority: CN
Inventors: 杜根荣; 吴贤信; 杨纪东
Original assignee: Zhejiang Modern Architectural Design & Research Institute Co ltd
Current assignee: Zhejiang Modern Architectural Design & Research Institute Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2023-03-10
Anticipated expiration: 2041-10-22
Also published as: CN113860500A

Abstract

The application relates to the field of sewage treatment, in particular to a hospital sewage treatment system based on MBR, which comprises an adjusting tank, an anaerobic tank, an aerobic tank, a membrane biological reaction tank and a clean water tank which are sequentially arranged, wherein a plurality of groups of membrane piles are arranged in the membrane tank; the membrane tank comprises a filtering cavity and a processing cavity, a bottom plate is arranged between the filtering cavity and the processing cavity, and a fixing assembly for fixing the position of the membrane stack is arranged in the filtering cavity; the bottom plate comprises a plurality of rotating plates which are all rotatably arranged, and when the plurality of rotating plates are positioned in the same plane, opposite side edges of every two adjacent rotating plates are mutually abutted; the treatment cavity is also internally provided with a driving component for driving the rotating plates to rotate; the membrane tank is also provided with a water inlet and a water outlet which are communicated with the treatment cavity, and the treatment cavity is also internally provided with an air pumping assembly for aeration. This application has the effect that makes things convenient for the staff to clear up mud in the membrane tank.

Description

Hospital sewage treatment system based on MBR

Technical Field

The application relates to the field of sewage treatment, in particular to a hospital sewage treatment system based on MBR.

Background

The hospital sewage contains a large amount of toxic and harmful substances such as bacteria, viruses, parasitic ova and the like, and if the hospital sewage is not properly treated, the surrounding environment is affected, even the health of a human body is harmed, so the hospital sewage can be discharged after being strictly treated.

MBR is a membrane bioreactor for short, is a novel sewage treatment technology organically combining a membrane separation technology and a biotechnology, and has the advantages of small occupied area, high degree of automation of operation, low suspended matter in effluent, good treatment effect on pathogenic microorganisms, small disinfectant dosage and the like, so that MBR is gradually applied to hospital sewage treatment in recent years.

As shown in fig. 1, a sewage treatment tank applying MBR technology comprises a regulating tank, an anaerobic tank, an aerobic tank, a membrane tank and a clean water tank which are arranged in sequence, wherein sewage generated by a hospital is collected in the regulating tank, then flows through the anaerobic tank and the aerobic tank in sequence, and most nitrogen and phosphorus containing organic matters in the sewage are removed through chemical reaction; discharging the sewage into a membrane tank, filtering and intercepting activated sludge and macromolecular organic matters in the sewage into the membrane tank by utilizing membrane separation equipment in the membrane tank, and further improving the quality of effluent water; and finally, discharging the sewage into a clean water tank for reuse or directly discharging the sewage.

Fig. 2 is a schematic structural diagram of a membrane stack as a membrane separation device in a membrane tank, wherein the membrane tank comprises a plurality of flat-plate type filtration membranes and a membrane frame for installing the filtration membranes, a plurality of groups of membrane stacks are arranged in the membrane tank, the filtration membranes of the groups of membrane stacks are communicated with each other (a communication pipeline is not shown), sewage is pumped into a clean water tank through the filtration membranes of each group of membrane stacks, and activated sludge and macromolecular organic matters in the sewage are intercepted in the membrane tank.

The activated sludge is a general term for microbial communities and organic substances and inorganic substances attached to the microbial communities, and has the effects of aggregating, adsorbing, oxidizing, decomposing and precipitating organic pollutants in sewage and the like. Through the filtration of the membrane stack, the concentration of the activated sludge in the membrane tank can be greatly increased, and the treatment capacity of organic pollutants is favorably improved.

Although the membrane pile arranged in the membrane pool improves the concentration of the activated sludge, when the sludge reaches the age of mud and needs to be cleaned, the existence of a plurality of groups of membrane piles in the membrane pool hinders workers from cleaning the sludge deposited at the bottom of the membrane pool, and great inconvenience is brought to the cleaning work of the workers.

Disclosure of Invention

In order to facilitate the cleaning of sludge by workers, the application provides a hospital sewage treatment system based on MBR.

The application provides a hospital sewage treatment system based on MBR adopts following technical scheme:

a hospital sewage treatment system based on MBR comprises an adjusting tank, an anaerobic tank, an aerobic tank, a membrane biological reaction tank and a clean water tank which are arranged in sequence, wherein a plurality of groups of membrane piles are arranged in the membrane tanks; the membrane tank comprises a filtering cavity and a processing cavity which are sequentially arranged from top to bottom, a bottom plate is arranged between the filtering cavity and the processing cavity, the peripheral sides of the bottom plate are abutted against the inner wall of the processing cavity, the membrane stack is positioned in the filtering cavity and is arranged at intervals with the bottom plate, and a fixing assembly for fixing the position of the membrane stack is arranged in the filtering cavity; the bottom plate comprises a plurality of rotating plates which are rotatably arranged, the rotating plates are arranged along the extending direction of one side of the film pool, the rotating axes of the rotating plates extend along the length direction of the rotating plates and are vertical to the arrangement direction of the rotating plates, when the rotating plates are positioned in the same plane, one opposite side edge of each two adjacent rotating plates is mutually abutted, and a driving assembly for driving the rotating plates to rotate is also arranged in the treatment cavity; the membrane tank is also provided with a water inlet and a water outlet which are communicated with the treatment cavity, and the treatment cavity is also internally provided with an air pumping assembly for aeration.

Through adopting above-mentioned technical scheme, the sewage that gets into in the membrane tank is handled by the bottom plate separation and in filtering the intracavity, and the sludge deposition in the sewage will fall on the bottom plate, distributes on every rotor plate of bottom plate. When the mud on the needs clearance bottom plate, the sewage in the membrane pond has been handled earlier, because the membrane stack is located the top of bottom plate, the staff can rotate every rotor plate through drive assembly, the one side that makes the rotor plate accept mud rotates towards the treatment chamber, the staff is full of the clear water to the treatment chamber through the water inlet this moment, start the aeration of pump gas subassembly in order to stir the clear water of pouring into, mud on every rotor plate is under the combined action that gravity and water stir, mix gradually and keep showy state in the clear water, the staff opens the drainage with the delivery port again, mud just can follow the outflow treatment chamber, thereby realize the clearance to mud, owing to avoided the hindrance of membrane stack, consequently, the operation that the staff cleared up mud has made things convenient for.

The cleaning degree of the sludge in the treatment cavity can be improved by increasing the number of times of injecting clear water into the treatment cavity. The two surfaces of the rotating plate can receive sludge in turn, and when the sludge on the bottom plate needs to be cleaned next time, the workers clean the sludge on the rotating plate by the same method. The cleaning frequency of the sludge on the bottom plate is properly improved, so that the amount of the sludge deposited on the bottom plate is relatively less every time, and the falling easiness of the sludge on each rotating plate can be increased.

Preferably, the inner side wall of the treatment cavity is circumferentially provided with an embedded groove, the periphery of the bottom plate is embedded in the embedded groove, and the part of each rotating plate of the bottom plate, which is positioned in the embedded groove, is abutted against the inner wall of one side of the embedded groove, which is close to the filter cavity; the bottom plate is vertically arranged in a sliding manner, and a lifting assembly used for lifting the bottom plate is further arranged in the treatment cavity.

By adopting the technical scheme, the caulking groove is formed, the area of the region for the contact between the bottom plate and the inner wall of the treatment cavity is increased, the probability that sewage in the filter cavity leaks into the treatment cavity from the position between the bottom plate and the inner wall of the treatment cavity can be reduced, and the trouble of cleaning excessive sewage in the treatment cavity is further reduced. The bottom plate moves downwards through the lifting assembly to be separated from the inner wall of the caulking groove, each rotating plate of the bottom plate can rotate, the bottom plate is lifted after the rotating plates are turned, the part, located in the caulking groove, of each rotating plate can be tightly abutted to the inner wall of the caulking groove, and sealing performance is guaranteed.

Preferably, the inner wall of one side of the caulking groove close to the filter cavity is circumferentially provided with a first sealing strip, and the first sealing strip is used for abutting against each rotating plate of the bottom plate.

By adopting the technical scheme, after the second sealing strip is extruded and deformed, the gap between the contact part of each rotating plate and the inner wall of the caulking groove can be further sealed, and the sealing effect between the bottom plate and the inner wall of the treatment cavity is improved.

Preferably, the two sides of the bottom plate in the length direction of the rotating plates are respectively provided with a bearing rod, each rotating plate is rotatably connected between the two bearing rods, the two bearing rods are respectively positioned in the caulking grooves on the inner walls of the treatment cavity at the same side, and a connecting rod is arranged between the two bearing rods; the lifting assembly comprises two sliding blocks arranged on the inner wall of the treatment cavity in a sliding mode, traction rods are hinged between the two sliding blocks and the connecting rod, a driving rod is connected to the inner wall of the treatment cavity in a rotating mode, the driving rod penetrates through the two sliding blocks and is in threaded fit with the two sliding blocks, the driving rod is divided into two sections with opposite spiral directions, the two sliding blocks are in threaded fit with the two sections respectively, and the lifting assembly further comprises a second driving piece used for rotating the driving rod.

Through adopting above-mentioned technical scheme, the staff passes through the rotatory actuating lever of second driving piece, and under the screw thread traction effect, two sliders will be close to each other or keep away from each other, and the slider drives the traction lever that corresponds and takes place to rotate, makes it the inclination between slider and connecting rod change, and vertical removal just can be followed to the connecting rod, and two receiving rod just can go up and down together with the piece rotor plate that does not of bottom plate.

Preferably, a plurality of limiting rods are arranged on the connecting rod in a penetrating mode in a vertical sliding mode and are fixedly arranged in the treatment cavity.

By adopting the technical scheme, the limiting rod can restrict the vertical sliding of the connecting rod, and the shaking between the connecting rod and the traction rod is reduced, so that the stability of the bottom plate in the position fixing process is improved, and the sealing between the bottom plate and the inner wall of the treatment cavity is further ensured.

Preferably, a rotating shaft penetrates through the rotating plate, two ends of the rotating shaft are respectively rotatably connected with the two bearing rods, and the driving assembly is used for driving the rotating shafts to rotate; the rotating plate is rotatably sleeved on the rotating shaft, and the rotating shaft is attached to the inner wall of the rotating plate; be provided with the card strip that extends along its length direction in the pivot, seted up on the inner wall of rotor plate and inlayed with the card strip and establish the complex draw-in groove, the radian that the draw-in groove was seted up along rotor plate inner wall circumference is greater than the radian of card strip on the equidirectional.

Through adopting above-mentioned technical scheme, the staff has the error through the turned angle of drive assembly control pivot, causes the rotor plate after the upset, is difficult to close completely between the adjacent rotor plate. And because the rotating plate is rotationally sleeved on the rotating shaft, when the rotating shaft rotates, the corresponding rotating plate can be driven to rotate through friction force, and the rotating plate can rotate relative to the rotating shaft. The staff only needs the turned angle of control pivot to be close the rotor plate and accomplishes the required angle of upset, rises at the rotor plate and when caulking groove inner wall butt, every rotor plate will be passive and rotate certain angle for respective pivot alone, until rotating to the horizontality, the side between the adjacent rotor plate just with the butt, the staff can be easier when control rotor plate upset and make smooth butt between the rotor plate closed. The setting of card strip and draw-in groove for when the rotor plate rotates and meets the resistance, through the inner wall butt of card strip and draw-in groove one side, can make the pivot drive the rotor plate smoothly and rotate.

Preferably, the two sides of the rotating plate, which are used for abutting against the adjacent rotating plate, are respectively provided with a second sealing strip.

Through adopting above-mentioned technical scheme, when two adjacent rotor plates butt until the upset becomes the horizontality, the second sealing strip of rotor plate side will be extruded and warp, and then can increase the leakproofness after the closure between the rotor plate.

Preferably, the pump gas subassembly is including establishing house steward and many branch pipes in the treatment chamber, many branch pipes and polylith rotor plate one-to-ones, and be located the below that corresponds the rotor plate respectively, is provided with a plurality of gas pockets along self length direction on the branch pipe, and many branch pipes all communicate with house steward, and the house steward wears out the membrane pond outside and is connected with the air pump.

Through adopting above-mentioned technical scheme, the setting of many spinal branchs pipe for the clear water that injects into in the treatment chamber turns over and stirs the degree more evenly, and every spinal branch pipe corresponds a rotor plate, can make the mud on every rotor plate faster and easier sneak into the clear water, thereby promotes the effect of clearance mud.

Preferably, the inner bottom wall of the treatment cavity is obliquely arranged downwards towards the water outlet.

Through adopting above-mentioned technical scheme, can make the water of treatment intracavity discharge from the delivery port more easily, reduce the remaining of treatment intracavity diapire water and mud.

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

through the arrangement of the bottom plate, sludge in the membrane tank is deposited on the bottom plate, and after each rotating plate of the bottom plate is turned over, the sludge is treated in the treatment cavity, so that the obstruction of a membrane stack can be avoided, and workers can conveniently clean the sludge;

through the arrangement of the caulking groove, the contact area between the bottom plate and the inner wall of the treatment cavity of the membrane tank can be increased, so that the sewage in the filtering cavity is not easy to leak into the treatment cavity in the treatment process;

through the arrangement of the lifting assembly, the rotating plate can still rotate under the condition that the bottom plate can be tightly abutted against the inner wall of the caulking groove, so that the cleaning of sludge is not influenced;

through the arrangement of the rotating plate and the rotating shaft in a rotating sleeved relation, the rotating plate is easier to control to turn by workers;

through the setting of pump gas subassembly, can promote treatment intracavity sewage treatment's effect.

Drawings

FIG. 1 is a schematic view showing a structure of a sewage treatment tank using MBR technology in the prior art;

FIG. 2 is a schematic diagram showing the structure of a membrane stack;

FIG. 3 is a schematic diagram showing the overall structure of a MBR-based hospital sewage treatment system in the embodiment of the present application;

FIG. 4 is a schematic diagram showing the overall structure of a membrane tank in the example of the present application;

FIG. 5 is a schematic partial cross-sectional view showing a membrane tank structure in an example of the present application;

FIG. 6 is a schematic view mainly showing the bottom structure of a membrane tank in the example of the present application;

FIG. 7 is a schematic view of the drive assembly and the pumping assembly of FIG. 5;

FIG. 8 is an enlarged schematic view of portion A of FIG. 7;

FIG. 9 is a schematic structural view showing a rotating plate and a rotating shaft in the embodiment of the present application;

FIG. 10 is an enlarged schematic view of portion B of FIG. 9;

fig. 11 is a schematic view mainly showing the construction of the lifting unit in fig. 5.

Description of reference numerals: 1. a sewage tank body; 11. a regulating reservoir; 12. an anaerobic tank; 13. an aerobic tank; 14. a membrane tank; 141. a filter chamber; 142. a treatment chamber; 1421. caulking grooves; 1422. an abutment bar; 1423. a first seal strip; 143. a water inlet; 144. a water outlet; 15. a clean water tank; 2. stacking the films; 21. filtering the membrane; 22. a mold frame; 3. a fixing component; 31. a first cross member; 32. a second cross member; 4. a base plate; 41. a rotating plate; 411. a second seal strip; 412. a card slot; 42. a rotating shaft; 421. clamping the strip; 43. a bearing rod; 44. a connecting rod; 5. a drive assembly; 51. rotating the rod; 52. a first bevel gear; 53. a second bevel gear; 54. a first motor; 55. a third bevel gear; 56. a fourth bevel gear; 6. a lifting assembly; 61. a slider; 62. a draw bar; 63. a drive rod; 64. a second motor; 65. a limiting rod; 7. a pumping assembly; 71. a header pipe; 72. a branch pipe; 721. air holes; 73. an air pump.

Detailed Description

The present application is described in further detail below with reference to figures 3-11.

The embodiment of the application discloses hospital sewage treatment system based on MBR. Referring to fig. 3 and 4, the sewage treatment system comprises a sewage tank body 1, wherein the sewage tank body 1 comprises a regulating tank 11, an anaerobic tank 12, an aerobic tank 13, a membrane tank 14 and a clean water tank 15 which are sequentially and horizontally arranged, and a plurality of membrane piles 2 are arranged in the membrane tank 14 and used for filtering and retaining activated sludge and macromolecular organic substances in sewage in the membrane tank 14.

Referring to fig. 5, the membrane tank 14 includes a filtering chamber 141 and a processing chamber 142 arranged in this order from top to bottom, and the depth of the filtering chamber 141 is greater than that of the processing chamber 142. A bottom plate 4 is arranged between the filtering cavity 141 and the processing cavity 142, the bottom plate 4 is abutted against the inner wall of the peripheral side of the membrane tank 14, and the filtering cavity 141 is separated from the processing cavity 142 by the bottom plate 4. The membrane stack 2 is positioned in the filtering cavity 141 of the membrane tank 14, sewage flowing into the membrane tank 14 is treated in the filtering cavity 141, and the bottom plate 4 replaces the inner bottom wall of the membrane tank 14 to receive settled sludge.

Referring to fig. 3, 5 and 6, the bottom plate 4 includes a plurality of rotating plates 41 rotatably disposed, the plurality of rotating plates 41 are horizontally arranged along an extending direction of the wastewater tank body 1, and a length direction of each rotating plate 41 is perpendicular to the arrangement direction of the rotating plates 41. Each rotating plate 41 rotates around the central axis in the length direction thereof, and the distance between the central axes in the length direction of every two adjacent rotating plates 41 is the same as the width of the rotating plate 41. When the wide side of each rotating plate 41 rotates to the horizontal state, the long sides of the opposite sides of two adjacent rotating plates 41 will abut against each other, that is, the bottom plate 4 is spliced into a plane for receiving sludge. Filter chamber 141, in turn, communicates with process chamber 142.

Referring to fig. 5, the bottom of the membrane tank 14 is provided with a water inlet 143 and a water outlet 144, both the water inlet 143 and the water outlet 144 are communicated with the treatment chamber 142, clean water for cleaning sludge can be injected into the treatment chamber 142 through the water inlet 143, and then discharged from the water outlet 144.

When sludge deposited on the bottom plate 4 needs to be cleaned, after sewage in the filter cavity 141 is treated, each rotating plate 41 of the bottom plate 4 can be firstly turned over, the side of the rotating plate 41 deposited with the sludge faces downwards, then clear water is filled into the treatment cavity 142 through the water inlet 143, the liquid level of the water can contact each rotating plate 41, the sludge on the rotating plates 41 can be mixed into the clear water, and finally the clear water is discharged from the water outlet 144 together, so that the sludge in the membrane tank 14 is cleaned.

Referring to fig. 6, the inner bottom wall of the treatment chamber 142 is disposed obliquely downward toward the water outlet 144 to reduce the residue of water and sludge in the treatment chamber 142.

Referring to fig. 5 and 7, a set of pumping assemblies 7 is further disposed in the processing chamber 142, each pumping assembly 7 includes a main pipe 71 and a plurality of branch pipes 72 communicated with the main pipe 71, and the main pipe 71 and the plurality of branch pipes 72 are fixed on the inner bottom wall of the processing chamber 142. The manifold 71 extends in the direction of arrangement of the rotating plates 41, and the manifold 71 extends to the outside of the membrane tank 14 and is connected to an air pump 73. The plurality of branch pipes 72 correspond to the plurality of rotating plates 41 one by one, and each branch pipe 72 is located directly below the corresponding rotating plate 41 and extends in the length direction of the corresponding rotating plate 41. The top side of each branch pipe 72 is provided with a plurality of air holes 721, and the air holes 721 are uniformly spaced along the length direction of the branch pipe 72.

After clean water is injected into the treatment cavity 142, the air pump 73 is started to aerate the treatment cavity 142, air is discharged from the air holes 721 of each branch pipe 72 through the header pipe 71, the clean water is stirred to enable sludge on the rotating plate 41 to fall more easily, and meanwhile, the sludge in the water can be kept in a suspension state, so that the sludge and the water can be conveniently discharged together. One branch pipe 72 corresponds to one rotating plate 41, so that sludge on each rotating plate 41 can be mixed into clean water more quickly and more easily, and the effect of cleaning the sludge is improved.

Referring to fig. 4 and 5, the membrane stack 2 in the membrane tank 14 is suspended above the bottom plate 4 to prevent the membrane stack 2 from obstructing the rotation of the rotating plate 41. Be equipped with the fixed subassembly 3 that is used for fixed a plurality of membrane piles 2 in the treatment cavity 142, fixed subassembly 3 includes many first crossbeams 31 that the horizontal interval was arranged, the both ends of first crossbeam 31 respectively with filter chamber 141's inner wall fixed connection, per two first crossbeams 31 are a set of, set up a plurality of membrane piles 2 between two first crossbeams 31 of the same group, the mould frame 22 of membrane pile 2 is rather than two first crossbeams 31 joint of both sides is fixed. The fixing component 3 further comprises a second cross beam 32, two ends of the second cross beam 32 are fixedly connected with the inner wall of the filter cavity 141, the arrangement direction of the plurality of second cross beams 32 is perpendicular to the arrangement direction of the plurality of first cross beams 31, the second cross beam 32 and the first cross beams 31 are arranged in a crossed manner, and the second cross beam 32 is used for sharing the weight of the membrane stack 2 borne by the first cross beam 31.

Referring to fig. 5, the bottom plate 4 further includes two receiving rods 43 with a square cross section, the two receiving rods 43 are parallel to each other and are horizontally arranged, the two receiving rods 43 are arranged at intervals along the length direction of the rotating plate 41, the rotating plates 41 are rotatably connected between the two receiving rods 43, and end faces of two ends of the rotating plate 41 are flush with opposite side walls of the receiving rods 43 on the same side.

Referring to fig. 9, each rotating plate 41 is provided with a rotating shaft 42 along its length direction, and a central axis of the rotating shaft 42 coincides with a central axis of the rotating plate 41 in the length direction. Two ends of the rotating shaft 42 respectively penetrate through two end surfaces of the corresponding rotating plate 41, and the rotating plate 41 is rotatably connected with the two bearing rods 43 through the rotating shaft 42.

Referring to fig. 5, two connecting rods 44 are further fixedly connected between the two bearing rods 43, the cross section of each connecting rod 44 is square, the two connecting rods 44 are parallel to the length direction of the rotating plates 41, the two connecting rods 44 are respectively located on two sides of the whole body formed by the rotating plates 41, and each connecting rod 44 is located outside the rotating track of the long edge of the adjacent rotating plate 41. The two connecting rods 44 and the two receiving rods 43 together serve as a carrier for mounting the plurality of rotating plates 41, and together with the plurality of rotating plates 41, form the bottom plate 4.

Referring to fig. 5 and 7, a set of driving assemblies 5 is disposed on one of the receiving rods 43 in the processing chamber 142 for driving the plurality of rotating plates 41 to rotate simultaneously. The driving assembly 5 comprises a rotating rod 51 rotatably connected to the adapting rod 43, the rotating rod 51 is parallel to the adapting rod 43, a first bevel gear 52 is fixedly sleeved on the rotating rod 51 corresponding to each rotating plate 41, a second bevel gear 53 is fixedly sleeved on one end, close to the rotating rod 51, of the rotating shaft 42 of each rotating plate 41, and each second bevel gear 53 is meshed with the corresponding first bevel gear 52 of the rotating plate 41. The rotating rod 51 drives a plurality of first bevel gears 52 to rotate, and each second bevel gear 53 will drive the corresponding rotating shaft 42 to rotate in the same direction, so as to realize the simultaneous rotation of a plurality of rotating plates 41.

Referring to fig. 7, the driving assembly 5 further includes a first driving member for driving the rotating rod 51 to rotate, and the first driving member is a first motor 54. The first motor 54 is fixed on the bearing rod 43, an output shaft of the first motor 54 is vertically arranged and fixedly sleeved with a third bevel gear 55, a fourth bevel gear 56 is fixedly sleeved on one end of the rotating rod 51 close to the first motor 54, and the fourth bevel gear 56 is meshed with the third bevel gear 55. The first motor 54 drives the rotating rod 51 to rotate through the third bevel gear 55 and the fourth bevel gear 56, and the extending direction of the output shaft of the first motor 54 is changed through the arrangement of the third bevel gear 55 and the fourth bevel gear 56, so that the space occupied by the first motor 54 in the horizontal direction in the processing chamber 142 can be reduced.

Referring to fig. 5 and 6, a circle of caulking grooves 1421 are circumferentially formed on the inner side walls of the four sides of the processing chamber 142, the caulking grooves 1421 circumferentially extend around the central axis of the processing chamber 142 in the vertical direction, the four side edges of the bottom plate 4 are respectively embedded into the caulking grooves 1421 on the same side, and the two bearing rods 43 and the two connecting rods 44 of the bottom plate 4 are respectively located in the caulking grooves 1421 on the same side. Both ends of each rotating plate 41 extend into the caulking grooves 1421 on the same side, when the receiving plate at the edge position is in a horizontal state, the long edge on one side close to the inner wall of the processing chamber 142 is also in the caulking groove 1421 on the same side as the rotating plate 41, and the part of each receiving plate in the caulking groove 1421 is abutted against the inner wall on one side close to the filtering chamber 141 of the caulking groove 1421. The bottom plate 4 can increase the contact area with the inner wall of the processing chamber 142 by the way that each rotating plate 41 is abutted against the inner wall of the caulking groove 1421, so that the sewage in the filtering chamber 141 is less prone to leakage from the space between the bottom plate 4 and the inner wall of the processing chamber 142.

Each rotation is in contact with one side inner wall of the insertion groove 1421 due to the sealing requirement, but the rotation plate 41 needs to be separated from the contact with the inner wall of the insertion groove 1421 to rotate. Referring to fig. 5, the width of the vertical slot of the recessed groove 1421 is greater than the width of the rotating plate 41, two sets of lifting assemblies 6 are disposed in the processing chamber 142, and the two sets of lifting assemblies 6 are used for driving the bottom plate 4 together with the driving assembly 5 to move vertically.

Referring to fig. 5 and 11, the two sets of lifting assemblies 6 have the same structure, and the two sets of lifting assemblies 6 respectively correspond to the two connecting rods 44, and the two sets of lifting assemblies 6 are respectively located in the caulking grooves 1421 where the corresponding connecting rods 44 are located. The lifting assembly 6 includes two sliding blocks 61 slidably disposed in the insertion groove 1421, and the sliding directions of the two sliding blocks 61 are parallel to the length direction of the connecting rod 44. Two sliders 61 all with the caulking groove 1421 keep away from the inboard wall butt of one side of filter 141, all articulate between every slider 61 and the connecting rod 44 has a traction rod 62. In the present embodiment, the distance between the two draw rods 62 and the end of the connecting rod 44 hinged to each other is smaller than the distance between the ends of the two draw rods and the end of the sliding block 61 hinged to each other. The inner side wall of the embedding groove 1421 abutted by the sliding block 61 is further rotatably connected with a driving rod 63, the driving rod 63 penetrates through the two sliding blocks 61 and is in threaded fit with the two sliding blocks 61, the driving rod 63 is divided into two sections with opposite rotation directions, and the two sliding blocks 61 are in threaded fit with the two sections respectively. One end of the driving rod 63 penetrates out of the membrane tank 14 and is connected with a second driving piece, the second driving piece is a second motor 64, an output shaft of the second motor 64 is coaxially connected with the driving rod 63, and the second motor 64 is fixed on the outer side of the membrane tank 14.

When the two driving rods 63 rotate synchronously, the driving rods 63 drive the corresponding two sliders 61 to approach or move away from each other. In this embodiment, when the two sliders 61 are away from each other, the two draw rods 62 are rotated to reduce the inclination, and the two draw rods 62 will drive the connecting rod 44 to descend, so that the plurality of rotating plates 41 of the bottom plate 4 are all disengaged from the inner side wall of the insertion groove 1421. When the distance between the rotating plate 41 and the inner sidewall of the side of the insertion groove 1421 close to the process chamber 142 is greater than half of the width of the rotating plate 41, the rotating plate 41 can rotate. After the rotating plate 41 is turned over, the driving rod 63 is rotated reversely, the two sliding blocks 61 in the same group are close to each other, the position of the connecting rod 44 is raised until the rotating plate 41 is tightly abutted against the inner wall of the caulking groove 1421 again, and then the water injection and sludge cleaning can be started to be performed into the treatment cavity 142.

It should be noted that the bottom plate 4 is abutted against the inner side wall of the caulking groove 1421 through the rotating plate 41, and therefore, the sealing between the rotating plate 41 and the receiving rod 43 and the connecting rod 44 can be omitted, and the sealing degree between the bottom plate 4 and the processing chamber 142 can be ensured, so that when the bottom plate 4 is lifted by the lifting unit 6, the receiving rod 43, the connecting rod 44 and the driving unit 5 are required to prevent the rotating plate 41 from abutting against the inner side wall of the caulking groove 1421 on the side close to the filter chamber 141.

To achieve the above purpose, referring to fig. 5, 7 and 8, the end of the rotating shaft 42 of the rotating plate 41 is rotatably connected to the top surface of the receiving rod 43, the receiving rod 43 is flush with the top surface of the connecting rod 44, and when the rotating plate 41 is in a horizontal state, the top surface of the rotating plate 41 is higher than the top surface of the receiving rod 43 and the top surface of the connecting rod 44.

Referring to fig. 7 and 8, the rotating rod 51, the first bevel gear 52, the second bevel gear 53, the third bevel gear 55 and the fourth bevel gear 56 in the driving assembly 5 are all located on the top surface of the bearing rod 43, the second motor 64 is fixed on the bottom surface of the bearing plate, and the output shaft of the second motor 64 vertically penetrates through one end of the bearing rod 43 to be connected with the third bevel gear 55. The caulking groove 1421 is close to integrated into one piece has butt strip 1422 on the one side inside wall of filter cavity 141, and butt strip 1422 is located and keeps away from one side of caulking groove 1421 tank bottom on this inside wall of caulking groove 1421, and butt strip 1422 extends with caulking groove 1421 circumference. The abutment bar 1422 allows the rotating plate 41 to be preferentially brought into abutment with the inner sidewall of the side of the recessed groove 1421 close to the filter chamber 141 without being obstructed by the components of the driving unit 5.

Referring to fig. 11, the lifting assembly 6 further includes two limiting rods 65, and the two limiting rods 65 are respectively located at two ends of the connecting rod 44 and vertically slidably penetrate through the connecting rod 44. The two limiting rods 65 are fixed in the embedding grooves 1421, and when the bottom plate 4 is lifted, the limiting rods 65 will restrict the sliding of the connecting rod 44, so as to reduce the shaking between the connecting rod 44 and the traction rod 62, and further increase the stability of the bottom plate 4 when the position is fixed. The top end of the limiting rod 65 is fixedly connected to the inner side wall of the embedding groove 1421 near the filter cavity 141, so that the limiting rod 65 can be avoided from the installation position of the driving rod 63.

Referring to fig. 9 and 10, each rotating plate 41 is rotatably sleeved on the corresponding rotating shaft 42, the inner wall of the rotating plate 41 is attached to the side wall of the rotating shaft 42, and the rotating shaft 42 drives the rotating plate 41 to rotate through the friction force between the rotating shaft 42 and the inner wall of the rotating plate 41 when rotating. When the rotating plate 41 is turned over, the worker only needs to rotate the rotating plate 41 to a state close to the horizontal state, when the rotating plate 41 rises and abuts against the inner side wall of the embedding groove 1421, each rotating plate 41 can automatically rotate to the horizontal state, the side edges between the adjacent rotating plates 41 can abut against each other, and the worker can more easily control the rotating plate 41 to turn over to enable the rotating plates 41 to abut against each other smoothly and close.

Referring to fig. 10, a clamping strip 421 is disposed on a side wall of the rotating shaft 42, the clamping strip 421 extends along a length direction of the rotating shaft 42, a clamping groove 412 for the clamping strip 421 to be embedded is disposed on an inner wall of the rotating plate 41, and a radian of the clamping groove 412 along a circumferential direction of the inner wall of the rotating plate 41 is greater than a radian of the clamping strip 421 extending in a same direction. When the rotating plate 41 encounters resistance when rotating, and the friction force between the rotating shaft 42 and the rotating plate 41 is not enough to drive the rotating plate 41 to rotate, the rotating shaft 42 will rotate relative to the rotating plate 41, until the clamping strip 421 abuts against the inner wall on the circumferential side of the clamping groove 412, the rotating shaft 42 can continue to drive the rotating plate 41 to rotate.

Referring to fig. 8 and 11, a first weather strip 1423 is disposed on an inner side wall of the recessed groove 1421 abutting against the rotating plate 41 of the bottom plate 4, the first weather strip 1423 is fixed on a surface of the abutting strip 1422 for abutting against the rotating plate 41, and the extending direction of the first weather strip 1423 is the same as that of the abutting strip 1422. Each rotating plate 41 of the bottom plate 4 abuts against the first sealing strip 1423, so that a gap between the bottom plate 4 and the inner side wall of the caulking groove 1421 can be further sealed, and the sealing effect between the bottom plate 4 and the inner wall of the processing chamber 142 is improved.

Similarly, in order to ensure the sealing performance between adjacent rotating plates 41 and prevent the sewage in the filtering chamber 141 from leaking into the processing chamber 142 from the gap between the rotating plates 41 during the processing, referring to fig. 8 and 9, a second sealing strip 411 is fixed to each of the two long sides of each rotating plate 41, and the second sealing strip 411 extends along the length direction of the rotating plate 41. When the rotating plates 41 rotate to the horizontal state, the second sealing strips 411 between two adjacent rotating plates 41 are extruded and deformed, and the sealing performance between the rotating plates 41 after being closed can be improved.

The implementation principle of the embodiment of the application is as follows: the membrane tank 14 is divided into a filtering cavity 141 and a processing cavity 142 by the bottom plate 4, the sewage filtering and the microorganism reaction in the membrane tank 14 are carried out in the filtering cavity 141, and the bottom plate 4 replaces the original bottom of the membrane tank 14 to receive the deposited sludge.

When the sludge on the bottom plate 4 needs to be cleaned, the worker firstly treats the sewage in the membrane tank 14, then the bottom plate 4 descends through the lifting assembly 6, the rotating plate 41 of the bottom plate 4 is separated from the abutting joint with the inner side wall of the caulking groove 1421, the worker simultaneously overturns the plurality of rotating plates 41 through the driving assembly 5, the top surfaces of the rotating plates 41 are overturned downwards, then the lifting assembly 6 lifts the bottom plate 4, the adjacent rotating plates 41 are closed again, and the bottom plate 4 is continuously sealed between the filter cavity 141 and the treatment cavity 142.

At this moment, the staff fills up the clear water in to the treatment chamber 142, opens air pump 73 simultaneously, through the aeration of pump gas subassembly 7 in to the treatment chamber 142, the mud on every rotating plate 41 will be sneaked into aquatic, and the aeration makes mud sneaked into aquatic from rotating plate 41 more easily, can make the mud of aquatic keep the suspended state simultaneously, and the mud of being convenient for is discharged from delivery port 144 with water together.

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 hospital sewage treatment system based on MBR, is equipped with multiunit membrane heap (2), its characterized in that including equalizing basin (11), anaerobism pond (12), good oxygen pond (13), membrane biological reaction pond and clean water basin (15) that arrange in proper order in membrane pond (14): the membrane tank (14) comprises a filtering cavity (141) and a processing cavity (142) which are sequentially arranged from top to bottom, a bottom plate (4) is arranged between the filtering cavity (141) and the processing cavity (142), the peripheral sides of the bottom plate (4) are abutted against the inner wall of the processing cavity (142), the membrane stack (2) is positioned in the filtering cavity (141) and is arranged at intervals with the bottom plate (4), and a fixing component (3) for fixing the position of the membrane stack (2) is arranged in the filtering cavity (141); the bottom plate (4) comprises a plurality of rotating plates (41) which are all rotatably arranged, the rotating plates (41) are arranged along the extending direction of one side of the membrane pool (14), the rotating axes of the rotating plates (41) extend along the length direction of the rotating plates and are perpendicular to the arranging direction of the rotating plates (41), when the rotating plates (41) are positioned in the same plane, one opposite side edges of every two adjacent rotating plates (41) are mutually abutted, and a driving assembly (5) for driving the rotating plates (41) to rotate is further arranged in the treatment cavity (142); the membrane tank (14) is also provided with a water inlet (143) and a water outlet (144) which are communicated with the treatment cavity (142), and the treatment cavity (142) is also internally provided with an air pumping assembly (7) for aeration; an embedded groove (1421) is formed in the circumferential direction of the inner side wall of the treatment cavity (142), the circumferential side of the bottom plate (4) is embedded in the embedded groove (1421), and the part, located in the embedded groove (1421), of each rotating plate (41) of the bottom plate (4) is abutted to the inner wall of one side, close to the filter cavity (141), of the embedded groove (1421); the bottom plate (4) is vertically arranged in a sliding manner, and a lifting assembly (6) for lifting the bottom plate (4) is also arranged in the treatment cavity (142); the two sides of the bottom plate (4) in the length direction of the rotating plate (41) are respectively provided with a bearing rod (43), each rotating plate (41) is rotatably connected between the two bearing rods (43), the two bearing rods (43) are respectively positioned in an embedded groove (1421) on the inner wall of the processing cavity (142) on the same side, and a connecting rod (44) is arranged between the two bearing rods (43); the lifting assembly (6) comprises two sliding blocks (61) arranged on the inner wall of the processing cavity (142) in a sliding mode, traction rods (62) are hinged between the two sliding blocks (61) and the connecting rod (44), a driving rod (63) is further connected to the inner wall of the processing cavity (142) in a rotating mode, the driving rod (63) penetrates through the two sliding blocks (61) and is in threaded fit with the two sliding blocks (61), the driving rod (63) is divided into two sections with opposite spiral directions, the two sliding blocks (61) are in threaded fit with the two sections respectively, and the lifting assembly (6) further comprises a second driving piece used for rotating the driving rod (63); the rotating plate (41) is provided with a rotating shaft (42) in a penetrating manner, two ends of the rotating shaft (42) are respectively connected with the two bearing rods (43) in a rotating manner, and the driving assembly (5) is used for driving the rotating shafts (42) to rotate; the rotating plate (41) is rotatably sleeved on the rotating shaft (42), and the rotating shaft (42) is attached to the inner wall of the rotating plate (41); the rotating shaft (42) is provided with a clamping strip (421) extending along the length direction of the rotating shaft, the inner wall of the rotating plate (41) is provided with a clamping groove (412) which is embedded and matched with the clamping strip (421), and the radian of the clamping groove (412) along the circumferential direction of the inner wall of the rotating plate (41) is larger than that of the clamping strip (421) in the same direction.

2. The MBR-based hospital sewage treatment system according to claim 1, wherein: the inner wall of one side of the caulking groove (1421) close to the filter cavity (141) is circumferentially provided with a first sealing strip (1423), and the first sealing strip (1423) is used for tightly abutting against each rotating plate (41) of the bottom plate (4).

3. The MBR-based hospital sewage treatment system according to claim 1, wherein: connecting rod (44) are gone up vertical slip and are worn to be equipped with many gag lever posts (65), and gag lever post (65) are fixed to be set up in treatment chamber (142).

4. The MBR-based hospital sewage treatment system of claim 1, wherein: and two sides of the rotating plate (41) which are used for being abutted against the adjacent rotating plate (41) are respectively provided with a second sealing strip (411).

5. The MBR-based hospital sewage treatment system according to claim 1, wherein: pump gas subassembly (7) are including establishing house steward (71) and many branch pipes (72) in treatment chamber (142), many branch pipes (72) and polylith rotor plate (41) one-to-one, and be located the below that corresponds rotor plate (41) respectively, are provided with a plurality of gas pockets (721) along self length direction on branch pipe (72), and many branch pipes (72) all communicate with house steward (71), and house steward (71) are worn out the membrane cisterna (14) outside and are connected with air pump (73).

6. The MBR-based hospital sewage treatment system according to claim 1, wherein: the inner bottom wall of the treatment chamber (142) is disposed obliquely downward toward the water outlet (144).