CN110606546A

CN110606546A - Novel sewage treatment rotating biological disk reactor

Info

Publication number: CN110606546A
Application number: CN201910766289.0A
Authority: CN
Inventors: 柴伟贺; 张世伟; 白玉娟
Original assignee: Dongchuan Industrial Park Branch Of Qinghai Jieshen Environmental Energy Industry Co Ltd; QINGHAI JIESHEN ENVIRONMENT ENERGY INDUSTRY CO LTD
Current assignee: Dongchuan Industrial Park Branch Of Qinghai Jieshen Environmental Energy Industry Co Ltd; QINGHAI JIESHEN ENVIRONMENT ENERGY INDUSTRY CO LTD
Priority date: 2018-09-25
Filing date: 2019-08-10
Publication date: 2019-12-24
Also published as: CN110606548A; CN211311013U; CN211311006U; CN110606552A; CN211311004U; CN211311011U; CN211311003U; CN110615529A; CN211311008U; CN110627202A; CN211311010U; CN110615523A; CN110606547A; CN211311005U; CN211367113U; CN110615528A; CN110606551A; CN110615527A; CN110606549A; CN211311009U

Abstract

The invention discloses a novel sewage treatment biological rotating disc reactor, which relates to the technical field of environmental protection equipment, and mainly structurally comprises a reaction tank, an upper shield, a three-dimensional net-shaped rotary contact body assembly and an aeration stirring and film blowing system; the cell body of reacting tank conduct sewage treatment, it can prevent also can prevent rainwater and debris entering reacting tank that sewage splashes to go up the guard shield, three-dimensional netted rotary contact body assembly both can avoid droing of solid of revolution surface biological layer, very big improvement the biological adhesion volume on the carrier again, make its biological adhesion volume be 900 times of conventional carrier, thereby can deal with the flow, the change of organic matter load, also have high adaptability to low temperature, aeration stirring and blown film system can guarantee to have sufficient aeration in the reacting tank, continue the stirring to sewage, can also blow the excessive biomembrane on the diaphragm, guarantee the normal work of three-dimensional netted rotary contact body assembly.

Description

Novel sewage treatment rotating biological disk reactor

Technical Field

The invention relates to the technical field of environmental protection equipment, in particular to a novel biological rotating disc reactor for sewage treatment.

Background

The biological rotating disk is a biological sewage treatment technology which is initiated in the original Federal Germany in the 60 th century, is a sewage treatment device recommended by the water supply and drainage setting manual of China, is rotary treatment equipment, forms a biological membrane with rich biological phases by rotating a plurality of groups of disks immersed in sewage for the attachment and growth of microorganisms, and degrades and treats organic matters in the sewage. The biological membrane is a microbial community which grows and breeds by depending on a medium attached to the surface of a solid, and the microorganisms attached to the surface of the solid medium have stronger adaptability to the change of water quality and water quantity, are beneficial to forming a stable ecological system by the microorganisms, have more varieties of inhabiting microorganisms, have higher treatment efficiency and have less sludge amount of degradation products.

The sewage treatment biological rotating disc reactor mainly comprises a disc body, a reaction tank, a rotating shaft, a driving device and the like. The disc mostly adopts circular or regular polygon corrugated plates, and the material is currently mostly polyethylene hard plastics or glass fiber reinforced plastics. The plate surface is covered by a film-shaped object formed by the growth of microorganisms, and the biological film is alternately and fully contacted with the wastewater and the air to continuously obtain pollutants and oxygen and purify the wastewater. Shear stress is generated between the film and the disc surface due to rotation, the film is increased along with the increase of the thickness of the film, and the film falls off from the disc surface to a certain degree and flows away along with water. The disc has the defects of easy falling of a biological film, low treatment efficiency, high energy consumption and the like.

Disclosure of Invention

In order to solve the technical problems, the invention provides a novel sewage treatment rotating biological disk reactor which is used in a sewage treatment process of a biological reactor taking bacillus as dominant bacteria, so as to culture, reproduce and activate the bacillus and avoid excessive biofilm formation on a rotating biological disk.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a novel sewage treatment biological rotating disc reactor, which comprises a reaction tank, a three-dimensional net-shaped rotary contact body assembly and an aeration stirring and film blowing system, wherein the reaction tank is provided with a reaction chamber; the three-dimensional netted rotary contact body assembly is arranged in the reaction tank, the aeration stirring and film blowing system is arranged at one end of the reaction tank, the sludge flushing aeration pipe and the stirring aeration pipe of the aeration stirring and film blowing system stretch into the reaction tank, and the sludge flushing aeration pipe and the stirring aeration pipe are arranged below the three-dimensional netted rotary contact body assembly.

Optionally, the reactor further comprises an upper shield, and the upper shield is arranged at the top of the reaction tank.

Optionally, the upper shield comprises an arc-shaped shield plate, and two ends of the arc-shaped shield plate are respectively provided with a shield end plate;

optionally, the arc-shaped cover plates include two end cover plates and a middle cover plate, the two end cover plates are arranged at two ends of the middle cover plate, and the outer ends of the two end cover plates are provided with the shield end plates;

optionally, a side plate is arranged around the arc-shaped cover plate;

optionally, the side plate is an angle steel, and a plurality of through holes are formed in the side plate and used for fixing the arc-shaped cover plate on the reaction tank;

optionally, a plurality of observation windows are arranged on the arc top cover plate, and the observation windows are arranged on two sides of the arc top cover plate in a staggered manner

Optionally, a leakage-proof groove is formed in the lower portion of the observation window, and the leakage-proof groove is used for preventing sewage splashed onto the inner wall of the arc top cover plate from flowing to the outer wall of the arc top cover plate;

optionally, the leakage-proof groove is an L-shaped plate, one side of the L-shaped plate is arranged on the inner wall of the arc top cover plate, and the other side of the L-shaped plate extends downwards perpendicular to the inner wall of the arc top cover plate;

optionally, the observation window is a plate provided with louver heat dissipation holes, one end of the observation window is movably hinged with the arc top cover plate, and the other end of the observation window is detachably connected with the arc top cover plate.

Optionally, the reaction tank includes a front end plate, a rear end plate, a bottom plate and two side bent plates, the two side bent plates are disposed between the front end plate and the rear end plate and located at two sides of the front end plate and the rear end plate, and the bottom plate is disposed at the bottom of the front end plate, the rear end plate and the side bent plates at two sides; a water inlet is formed in the upper portion of the front end of the main body, a water outlet is formed in the upper portion of the rear end of the main body, and a drain port is formed in the lower portion of one side of the main body;

optionally, the lateral bending plate includes a vertical section and a lateral bending section, the lateral bending section is disposed at the bottom of the vertical section, and the lateral bending section is inclined toward the axis direction of the main body;

optionally, a first reinforcing rib is arranged at the top of the main body, the first reinforcing rib comprises a long reinforcing rib and a short reinforcing rib, the long reinforcing rib is arranged at the top of the side bent plate, and the short reinforcing rib is arranged at the top of the front end plate and the rear end plate;

optionally, a transverse reinforcing rib is arranged around the outer side of the main body, and a longitudinal reinforcing rib is arranged between the transverse reinforcing rib and the first reinforcing rib;

optionally, an end plate is arranged in the middle of the short reinforcing rib, two ends of the end plate are fixedly connected with the short reinforcing rib, the end plate is a rectangular plate, an arc-shaped opening is formed in the top of the end plate, and the top of the end plate inclines towards the outer side of the main body;

optionally, a turntable support is respectively arranged at two ends of the main body, and the turntable support is used for supporting the three-dimensional net-shaped rotary contact body assembly;

optionally, the outer sides of the bottoms of the front end plate and the rear end plate are both provided with a reinforcing support;

optionally, a plurality of aeration pipeline brackets are arranged inside the main body;

optionally, a plurality of aerator pipe reinforcing rings are arranged on the rear end plate.

Optionally, the three-dimensional mesh-shaped rotary contact body assembly comprises a turntable body and a plurality of biological contact discs; the biological contact discs are arranged on the turntable body in parallel;

optionally, the turntable body includes a turntable support and a transmission shaft, the transmission shaft penetrates through the middle of the turntable support, and the plurality of biological contact discs are arranged on the turntable support;

optionally, the turntable support comprises two outer fixed disks, a central fixed disk and a plurality of middle lacing wires; two outside fixed disks set up respectively in the one end of transmission shaft, a central fixed disk set up in the transmission shaft middle part, a plurality of middle lacing wires set up in between outside fixed disk and the central fixed disk. A plurality of outer side supporting sleeves are arranged on the outer side fixing disc; the outer side supporting sleeve is used for mounting a net-shaped contact body;

optionally, the turntable support further comprises a central fixed disk, the central fixed disk is arranged in the middle of the transmission shaft, one end of the middle lacing wire is connected with the outer fixed disk, and the other end of the middle lacing wire is connected with the central fixed disk;

optionally, tie bar backing plates are further arranged between the central fixing disk and the middle tie bar and between the outer fixing disk and the middle tie bar;

optionally, a plurality of intermediate support sleeves are arranged on the central fixed disk;

optionally, the turntable support further comprises a reinforcing rib base plate, the reinforcing rib base plate is an arc-shaped plate, the arc-shaped plate is fixedly arranged on the transmission shaft, and the central fixing disc is arranged on the reinforcing rib base plate;

optionally, both sides of the central fixed disk are provided with central disk reinforcing ribs, the central disk reinforcing ribs are L-shaped members, the bottoms of the central disk reinforcing ribs are connected with the reinforcing rib base plate, and the side parts of the central disk reinforcing ribs are connected with the central fixed disk;

optionally, the number of the middle lacing wires is six;

optionally, the biological contact tray further comprises an inner connecting tray, wherein the inner connecting tray is arranged between the central fixed tray and the biological contact tray, or the inner connecting tray is arranged between the outer fixed tray and the biological contact tray;

optionally, the inner connecting disc is of a cylindrical structure, one end of the inner connecting disc is provided with a limiting portion and a third connecting portion, and the third connecting portion protrudes out of the limiting portion along the axial direction of the inner connecting disc;

optionally, the third connecting part is an external thread or an internal thread;

optionally, the supporting device further comprises a supporting shaft, one end of the supporting shaft is inserted into the inner connecting disc, and the other end of the supporting shaft is connected with the central fixed disc, or the other end of the supporting shaft is connected with the outer fixed disc;

optionally, the transmission shaft includes a shaft body, and two ends of the shaft body are respectively provided with a shaft head; the shaft body is of a hollow cylinder structure, and one end of the shaft head is inserted into the hollow cylinder and then fixedly connected with the inner wall of the hollow cylinder;

optionally, a connecting part is arranged at one end of the shaft head inserted into the shaft body;

optionally, the connecting portion includes a first support ring, a reinforcing rib, and a second support ring, the first support ring and the second support ring are both sleeved on the spindle nose, and the reinforcing rib is disposed between the first support ring and the second support ring;

optionally, the first support ring and the second support ring are both welded to the inner wall of the shaft body;

optionally, a plurality of through holes are formed in the side walls at the two ends of the shaft body, and the through holes are used for welding and connecting the first support ring and the second support ring with the inner wall of the shaft body;

optionally, each connecting portion includes four reinforcing ribs, and each reinforcing rib is of a rectangular parallelepiped structure;

optionally, the first support ring and the second support ring are in interference fit or transition fit with the shaft body;

optionally, the shaft head comprises a driving shaft head and a driven shaft head, and the driving shaft head and the driven shaft head are respectively arranged at one end of the shaft body;

optionally, each biological contact tray includes a plurality of fan-shaped diaphragms uniformly arranged along the circumferential direction, a plurality of through holes are formed in each diaphragm, and the positions of the plurality of through holes of the diaphragms on adjacent biological contact trays correspond to each other;

optionally, the biological contact tray further comprises a connecting disc, and the connecting disc is arranged between the corresponding through holes on the adjacent biological contact trays;

optionally, two ends of the connecting disc are respectively provided with a limiting ring, one end of the connecting disc is provided with a first connecting part, the other end of the connecting disc is provided with a second connecting part, the first connecting part is matched with the second connecting part, and the first connecting part and the second connecting part both protrude out of the limiting ring along the axis direction of the connecting disc; the first connecting part and the second connecting part are respectively inserted into one through hole;

optionally, the first connecting portion is an external thread or an internal thread, and the second connecting portion is an internal thread or an external thread;

optionally, the connecting disc is made of an ultra-high molecular polyethylene material;

optionally, the diaphragm is made of a material containing vinylidene chloride, and the surface of the diaphragm is provided with a wire mesh structure with a porosity of 95% -98%.

Optionally, the aeration stirring and film blowing system comprises an air inlet, one end of the air inlet is communicated with an air source, the other end of the air inlet is communicated with a sludge flushing aeration pipe and a stirring aeration pipe, the sludge flushing aeration pipe and the stirring aeration pipe are both horizontal hollow pipes, the top of the sludge flushing aeration pipe is provided with a plurality of sludge flushing aeration holes, and the bottom of the stirring aeration pipe is provided with a plurality of stirring aeration holes;

optionally, an air inlet valve is arranged between the air inlet and the air source;

optionally, the air source is a blower;

optionally, branch pipe air inlet valves are arranged between the air inlet and the sludge flushing aerator pipe and between the air inlet and the stirring aerator pipe;

optionally, at least one sludge flushing aeration pipe and at least one stirring aeration pipe are included;

optionally, a gas flowmeter is arranged at the air inlet.

Compared with the prior art, the invention has the following technical effects:

the membrane adopts polyvinylidene chloride PVDC as a high-quality material to be processed into a solid mesh body, the mesh body is in a mesh state with the porosity of more than 95-98%, and the biological layer can enter the inside of the solid mesh, so that the falling of the biological layer on the surface of the revolving body can be avoided, the biological attachment amount on the carrier is greatly improved, the biological attachment amount is 900 times of that of the conventional carrier, the change of flow and organic matter load can be coped with, and the adaptability to low temperature is extremely high. ② 40 percent of the biological film is immersed in water and rotates at the speed of 2-8 rpm, and the main function is to culture, propagate and activate bacillus. ③ the weight of the diaphragm is light (the density is 0.05 to 0.06 g/cm)³) And the material has a water-blocking characteristic, so that the power consumption of the motor is low, and the subsequent maintenance and operation are simple and convenient. And fourthly, a mechanical structure with high-quality materials and extremely high strength is adopted, so that the device is stable in operation and long in service life. The surface area of the disc of a single biological rotating disc is up to 750 square meters, and the BOD load is up to 300 Kg/disc/day. And an aeration stirring and film blowing system is additionally arranged in the reaction tank: the stirring aeration pipe is in a normally open state, so that the mixed liquid in the box body is always in a suspension state; the sludge flushing aerator pipe is opened when necessary to ensure that the biological rotator has proper biofilm formation amount. The rotating body shield on the upper part of the reaction tank adopts a three-section stainless steel shield, so that the corrosion resistance is excellent, the ventilation performance is good, the film hanging condition of the rotating body is easy to observe, and the rotating body shield can be conveniently and automatically disassembled and assembled no matter a crane is provided or not.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and 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 to obtain other drawings without creative efforts.

FIG. 1 is a front view of a rotating biological disk reactor for sewage treatment according to the present invention;

FIG. 2 is a top view of a rotating biological disk reactor for wastewater treatment according to the present invention;

FIG. 3 is a left side view of the rotating biological disk reactor for sewage treatment according to the present invention;

FIG. 4 is a right side view of the rotating biological disk reactor for sewage treatment according to the present invention;

FIG. 5 is a front view of a reaction tank of a rotating biological disk reactor for sewage treatment;

FIG. 6 is a top view of a reaction tank of a rotating biological disk reactor for sewage treatment;

FIG. 7 is a left side view of a reaction tank of a rotating biological disk reactor for sewage treatment;

FIG. 8 is a right side view of a reaction tank of a rotating biological disk reactor for sewage treatment;

FIG. 9 is a sectional view of a reaction tank of a rotating biological disk reactor for sewage treatment;

FIG. 10 is a schematic axial view of an aeration, agitation and film blowing system of a sewage treatment rotating biological disk reactor;

figure 11 is a front view of a three dimensional net-like rotary contact body assembly;

figure 12 is a transverse cross-sectional view of a three-dimensional mesh rotary contact body assembly;

figure 13 is a longitudinal cross-sectional view of a three-dimensional reticulated rotary contact body assembly;

figure 14 is a partial cross-sectional view at the three dimensional web rotary contact assembly I;

figure 15 is a partial cross-sectional view at position II of a three-dimensional mesh rotary contact body assembly;

FIG. 16 is a front view of the upper shield;

FIG. 17 is a top view of the upper shield;

FIG. 18 is a cross-sectional view of the upper shield;

description of reference numerals: 1. an aeration stirring and film blowing system; 2. a bearing; 3. an upper shield 4, a three-dimensional net-shaped rotary contact body assembly; 5. a reaction tank; 6. a speed reducer; 7. an electric appliance control cabinet; 8. the speed reducer supports a reaction moment arm; 9. anchor bolts; 10. emptying the air; 11. a driven end support; 12. shackle dismounting; 13. lifting lugs; 14. a side bending plate; 15. channel steel of the reaction notch; 16. transverse reinforcing ribs; 17. longitudinal reinforcing ribs; 18. an active end support; 19. emptying the air; 20. supporting channel steel of the reaction tank; 21. an electric appliance control cabinet bracket; 22. a front end plate; 23. a water inlet; 24. a nameplate fixing plate; 25. a water outlet; 26. a water inlet; 27. an air tube reinforcement ring; 28. a rear end plate; 29. an air line support; 32. a base plate; 33. a water outlet; 41. a main pipe air inlet valve; 42. a gas flow meter; 43. a sludge flushing aeration pipe; 44. stirring the aeration pipe; 45. branch pipe air inlet valves; 46. a trachea fixing sleeve; 47. a three-way pipe joint; 48. an air tube plug; 51. a turntable; 52. a biological contact body; 53. a cotter pin; 54. a support shaft; 55. an inner connection plate; 56. a connecting disc; 57. a rubber gasket; 58. an outer connecting disc; 61. two end cover plates; 62. a vent hole; 63. a semicircular flange; 64. an observation window; 65. a middle cover plate; 66. an upper shield sideboard; 67. a lifting eye screw reinforcing plate; 68. a lifting eye screw; 69. a gasket; 70. a nut; 71. a shield end plate.

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.

The first embodiment is as follows:

as shown in fig. 1 to 18, the present embodiment provides a novel rotating biological disk reactor for sewage treatment, which mainly comprises an aeration stirring and sludging system 1, an upper shield 3, a three-dimensional net-shaped rotary contact body assembly 4, a reaction tank 5, a speed reducer 6, an electrical control cabinet 7 and a speed reducer counter moment arm 8.

The reaction tank 5 is used as a supporting body and a water tank of the biological rotating disk, has high strength, rigidity and super-strong corrosion resistance, and mainly comprises a driven end support 11, a shackle 12, a lifting lug 13, a side bent plate 14, a reaction tank opening channel steel 15, a transverse reinforcing rib 16, a longitudinal reinforcing rib 17, a driving end support 18, an emptying port 19, a reaction tank supporting channel steel 20, an electric appliance control cabinet support 21, a front end plate 22, a nameplate fixing plate 24, a water inlet 26, an aeration pipe reinforcing ring 27, a rear end plate 28, an air pipeline support 29, a bottom plate 32 and a water outlet 33.

Two side bent plates 14, front end plate 22 and back end plate 28 constitute the main part basin of reaction tank 5, for the rigidity of guaranteeing the basin, weld one horizontal strengthening rib 16 and several vertical strengthening rib 17 at side bent plate 14, respectively weld one horizontal strengthening rib 25 and several vertical strengthening rib 17 on front end plate 22 and back end plate 28, weld reaction notch channel-section steel 15 in order to guarantee basin upper portion intensity in upper portion. The lower parts of the front end plate 22 and the rear end plate 28 are provided with reaction tank supporting channel steel 20, and the lower parts of the two sides of the reaction tank supporting channel steel are provided with mounting holes for mounting a novel sewage treatment biological rotating disc reactor complete machine.

The front end plate 22 of the reaction tank 5 is provided with an active end bracket 18, a drain port 19, an electric appliance control cabinet bracket 21, a nameplate fixing plate 24 and a water outlet 33.

The driving end bracket 18 is a welded structural member, the upper part of which is connected with a water notch channel steel, and the lower part of which is connected with a reaction tank supporting channel steel 20, and is used as a reinforcing rib plate of a front end plate 22 and a driving part support of the three-dimensional net-shaped rotary contact body assembly 4. And a moment arm limiting seat of the speed reducer is arranged on the limiting seat, so that the normal work of the speed reducer is ensured.

The evacuation port 19 is a normally closed port and is provided for evacuating the muddy water mixed liquid in the water tank when the equipment is overhauled or does not work any more.

The electric appliance control cabinet bracket 21 is two pieces of perforated angle steel and is used for fixing the electric appliance control cabinet 7.

The nameplate fixing plate 24 is welded to the front end plate 22 and used for fixing the nameplate of the device.

The water outlet 33 is used for outflow of muddy water mixed liquid.

The rear end plate 28 of the reaction tank 5 is provided with a driven end bracket 11, an aeration pipe mounting hole, an aeration pipe reinforcing ring 27 and a water inlet 26.

The driven end support 11 is a welded structural member, the upper part of the driven end support is connected with a water notch channel steel, and the lower part of the driven end support is connected with a reaction tank supporting channel steel 20, so that the driven end support not only serves as a reinforcing rib plate of a rear end plate 28, but also serves as a driven end support of the three-dimensional net-shaped rotary contact body assembly 4.

The aeration pipe mounting hole is used for mounting the aeration stirring and mud flushing system 1, and the aeration pipe reinforcing ring 27 plays a reinforcing role.

The water inlet 26 is used for the entrance of muddy water mixed liquid.

Two lifting lugs 13 are welded in the reaction notch channel steel 23 on the upper parts of the front end plate 22 and the rear end plate 28, and shackles 12 are arranged on the lifting lugs 13 and are used for lifting the reaction tank 5 and the whole machine.

The three-dimensional net-shaped rotary contact body assembly 4 is arranged on the driving end support 18 and the driven end support 11 through a pair of bearings 2, the bearings 2 are fastened by a pair of bolt sets, and positioning jackscrews are arranged on two sides of each bearing to prevent looseness in the operation process.

The driving end of the three-dimensional net-shaped rotary contact body assembly 4 is provided with a horizontal gear motor, a direct-axis speed reducer 6, a speed reducer support counter moment arm 8 is arranged on a shell of the speed reducer 6, and the moment arm 8 is hinged with a fixed support of the reaction tank 5 through a pin shaft.

The three-dimensional reticular rotary contact body assembly 4 mainly comprises a turntable 51, a biological contact body 52, a cotter pin 53, a supporting shaft 54, an inner connecting disc 55, a connecting disc 56, a rubber gasket 57 and an outer connecting disc 58.

The turntable 51 is mainly composed of a main shaft, two outer fixed disks and a central fixed disk. The biological contact body mounting space is divided into two sections by the three fixed disks, each fixed disk is provided with 36 groups of mounting holes which are equally divided, corresponding stainless steel supporting sleeves are welded on the holes, and the supporting sleeves on the three fixed disks are concentrically arranged.

The biological contact body 52 is an 1/6 circular sector three-dimensional net-shaped body, and thin edges formed by hot pressing are arranged in the area of the mounting hole and on the outer side of the mounting hole so as to ensure the strength and mounting requirements of the biological contact body.

The biological contact bodies are divided into 12 groups of relatively independent contact bodies. The plurality of biological contact bodies 52 are connected into an integral contact body group in the order of mounting the connection disc 56, the rubber washer 57, the biological contact body 52, the rubber washer 57, and the connection disc 56.

The connecting disc 56 is provided with an inner bolt at one end and an outer thread at one end, and can be connected in pairs, and the flange at the end part is matched with the mounting hole of the biological contact body 52 to play a role in positioning. During installation, the connecting discs are mutually screwed step by step, and the reliability of connection of the contact body group is ensured.

The inner connecting disc 55 is an inner thread single-side connecting disc, and the outer connecting disc 58 is an outer thread single-side connecting disc. The two types of connection pads can be formed by modifying the connection pad 56, and the total length of the connection pads can be properly modified.

The outer end connecting discs of the contact body group are the inner connecting disc 55 and the outer connecting disc 58, the outer sides of the inner connecting disc 55 and the outer connecting disc 58 are repaired, the contact body group can be assembled according to the actual installation size of the rotary disc, and the requirement on the welding precision of the rotary disc 51 is reduced.

The supporting shaft 54 is formed by press-fitting a section of stainless steel round steel at two ends of a stainless steel tube in a transition fit manner, circumferential welding is performed at the end parts, and a plurality of plug welding holes are uniformly formed at the two ends of the stainless steel tube along the circumference for plug welding so as to ensure the connection strength of the round steel and the steel tube.

A radial through hole is formed at a proper position at one end of the support shaft 54 for axial positioning of the support shaft 54.

Two opening pin holes are formed in the outer fixed disc supporting sleeve of the rotary disc 51, the inner opening pin hole is used for fixing the supporting shaft 54, and the outer opening pin hole is used for ensuring that the supporting shaft 54 cannot be separated after the connection of the inner opening pin hole fails.

The assembled contact body group is sleeved in the rotating disc 51 by a plurality of supporting shafts 54, the supporting shafts 54 are in axial floating connection with the supporting sleeve of the middle fixed disc, two split pins 53 are installed on the outer fixed supporting sleeve, and the supporting shafts 54 are connected with the supporting sleeve by the inner split pins 53 to limit the axial movement of the supporting sleeve. The outer cotter pin plays a role in safety protection.

The novel three-dimensional net-shaped rotary contact body assembly structure is reasonable and novel in arrangement, light in overall weight, good in rigidity, firm and reliable in installation of the biological contact body, stable in operation and long in service life.

The electric control cabinet 7 is arranged on an electric control cabinet bracket 21 of the reaction tank 5 by a bolt group, and a frequency converter control system is arranged in the electric control cabinet 7 and can adjust the output rotating speed of a speed reducer so as to meet the optimal process requirement.

The upper stainless steel shield 3 is installed on the upper portion of the reaction tank 5, and the upper shield 3 is of a stainless steel plate welding assembly structure so as to prevent sewage in the reaction tank from being thrown out by the rotating body and prevent foreign matters such as rainwater from falling into the reaction tank.

The upper shield 3 mainly comprises two end arc-shaped cover plates 61, vent holes 62, a semicircular flange 63, an observation window 64, a middle arc-shaped cover plate 65, an upper shield side plate 66, a lifting ring bolt reinforcing plate 67, a lifting ring bolt 68, a gasket 69, a nut 70 and a shield end plate 71.

The upper shield 3 is a three-section type assembly structure. The left and right end expanding covers are formed by welding two end arc-shaped cover plates 61, vent holes 62, lifting bolt reinforcing plates 67, semicircular flanges 63, upper cover side plates 66 and 72, a cover end plate 71 and the like, and the middle expanding cover is formed by welding a middle arc-shaped cover plate 65, the semicircular flanges 63 and a cover side plate. And the corresponding part is provided with an inspection window 64, so that the adhesion condition of the bacillus on the biological revolving body can be conveniently observed, and the inspection window also plays a role in ventilation of the box body.

The ventilation hole 62 may be connected to a ventilation device to remove odor, if necessary.

Lifting ring screws 68 are mounted on the left and right end shield ends and fixed by washers 69 and nuts 70. To facilitate lifting of the upper shroud 3.

The aeration stirring and mud flushing system 1 is arranged on the reaction tank 5 through aeration pipe fixing sleeves 46 welded in corresponding hole positions of the reaction tank 5, and has the functions of aeration, mud flushing and stirring.

3 or 4 groups of stainless steel or PPA aeration pipes are arranged in each reaction tank, a certain number of aeration holes are uniformly distributed at the top or the bottom of each aeration pipe, and a certain amount of gas is sent into the aeration pipes by pressure air through a ball valve gas flowmeter, a vertical pipe, a tee joint, a horizontal pipe and a fixed sleeve for aeration. The aerator pipe must pay attention to the direction of the aeration hole during installation because of the difference of the functional requirements: the sludge flushing aerator pipe 43 has the function of flushing sludge on the contact body so as to ensure that the film hanging quantity of the contact body is not too much in a certain time and the aeration hole is upward during installation; the stirring aeration pipe 44 functions to stir the sludge at the bottom of the reaction tank to prevent excessive deposition of useful bacteria, stabilize the purification effect, and make the aeration hole downward when installed. The total air inflow and the air inflow of each aeration pipe can be controlled by corresponding ball valves.

The stirring aeration pipe 44 and the sludge flushing aeration pipe 43 are supported by three sets of aeration pipeline supports 29 respectively to ensure the rigidity, the main air inlet pipe and the branch air inlet pipe are respectively provided with an air inlet valve 41 and an air inlet valve 45, and the main air inlet pipe is provided with a gas flowmeter to observe the size of the air quantity at any time and adjust the air supply quantity in time according to the requirement.

The foundation bolt 9 is used for installing and fixing the whole machine.

After the installation is finished, about 40% of the three-dimensional net-shaped rotary contact body assembly 4 is immersed in water, a power supply is started, a horizontal gear motor and a direct-alternating-current shaft type speed reducer 6 start to work to drive the three-dimensional net-shaped rotary contact body assembly 4 to rotate at a constant speed to form an environment with aerobic property on water and anoxic property under water, the net-shaped contact body carries out microorganism biofilm formation under the action of bacillus, meanwhile, a dissolved oxygen gradient with aerobic property outside a biological membrane and anoxic property in the membrane is formed, a synchronous nitrification and denitrification process is realized in the three-dimensional rotary net-shaped contact body assembly, and the function of efficiently removing organic matters, ammonia nitrogen, total nitrogen.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. A novel sewage treatment biological rotating disc reactor is characterized by comprising a reaction tank, a three-dimensional net-shaped rotary contact body assembly and an aeration stirring and film blowing system; the three-dimensional netted rotary contact body assembly is arranged in the reaction tank, the aeration stirring and film blowing system is arranged at one end of the reaction tank, the sludge flushing aeration pipe and the stirring aeration pipe of the aeration stirring and film blowing system stretch into the reaction tank, and the sludge flushing aeration pipe and the stirring aeration pipe are arranged below the three-dimensional netted rotary contact body assembly.

2. The novel rotating biological disk reactor for sewage treatment according to claim 1, further comprising an upper shield disposed at the top of the reaction tank.

3. The novel rotating biological disk reactor for sewage treatment according to claim 2, wherein the upper shield comprises an arc-shaped shield plate, and a shield end plate is respectively arranged at two ends of the arc-shaped shield plate;

optionally, a side plate is arranged around the arc-shaped cover plate;

optionally, the observation window is a stamping part provided with louver heat dissipation holes, one end of the observation window is movably hinged with the arc top cover plate, and the other end of the observation window is detachably connected with the arc top cover plate.

4. The novel rotating biological disk for sewage treatment according to claim 1, wherein the reaction tank comprises a front end plate, a rear end plate, a bottom plate and two side bent plates, the two side bent plates are arranged between the front end plate and the rear end plate and positioned at two sides of the front end plate and the rear end plate, and the bottom plate is arranged at the bottom of the front end plate, the rear end plate and the two side bent plates; a water inlet is formed in the upper portion of the front end of the main body, a water outlet is formed in the upper portion of the rear end of the main body, and a drain port is formed in the lower portion of one side of the main body;

5. The novel wastewater treatment biological rotating disc reactor according to claim 1, wherein the three-dimensional mesh-like rotary contact body assembly comprises a rotating disc body and a plurality of biological contact discs; the biological contact discs are arranged on the turntable body in parallel;

optionally, the number of the middle lacing wires is six;

6. The novel sewage treatment rotating biological disk reactor according to claim 1, wherein the aeration stirring and film blowing system comprises an air inlet, one end of the air inlet is communicated with an air source, the other end of the air inlet is communicated with a sludge flushing aeration pipe and a stirring aeration pipe, the sludge flushing aeration pipe and the stirring aeration pipe are horizontal hollow pipes, the top of the sludge flushing aeration pipe is provided with a plurality of sludge flushing aeration holes, and the bottom of the stirring aeration pipe is provided with a plurality of stirring aeration holes;

optionally, the air source is a blower;

optionally, a gas flowmeter is arranged at the air inlet.