Multistage series modular domestic sewage treatment system

Abstract

The invention relates to the field of sewage treatment, in particular to a multi-stage series modular domestic sewage treatment system which is provided with a grating tank, a sedimentation tank, a primary aeration tank, a sedimentation circulating tank, a secondary aeration tank, a subsurface wetland and a water outlet tank which are sequentially connected in series, a plurality of groups of aeration cylinders are arranged in the primary aeration tank and are respectively communicated with an air supply pipe and a circulating pipe, and a plurality of groups of aeration cylinders are arranged in the secondary aeration tank. One end of the circulating pipe is communicated with the sedimentation circulating tank, and the other end of the circulating pipe is mounted in the primary aeration tank and is connected with the aeration cylinder. According to the invention, muddy water is subjected to aeration treatment of the multi-stage aeration tank, the aeration cylinder arranged in the aeration tank can adaptively change the height of the grating plate in the aeration cylinder according to different sludge loads, the displacement of the grating plate is converted into the corresponding displacement of the mounting frame body and the mounting plate, and when the sludge load is too large, the mounting plate can be mounted on the mounting frame body and the mounting plate. The air hole I and the air hole II are opened to generate larger oxygen bubbles, so that the reaction and reproduction efficiency of microorganisms is promoted, the decomposition efficiency of harmful substances is ensured, and the working efficiency of the aeration tank is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a multi-stage series modular domestic sewage treatment system. Background Art

[0002] Domestic sewage treatment system refers to a series of facilities that collect and treat domestic sewage generated in daily life to prevent environmental pollution and protect public health. Domestic sewage mainly comes from households, businesses, public facilities, etc., and contains a large amount of organic matter, nutrients such as nitrogen and phosphorus, pathogens, heavy metals and other harmful substances.

[0003] Domestic sewage treatment requires multi-stage modular treatment such as grid filtration, aeration treatment, and sedimentation. When sewage is aerated, the contact between sewage and air oxygen can accelerate the growth of microorganisms in water and sludge, and the decomposition of harmful substances in water is achieved through microorganisms. Although the basic aeration operation is achieved through aeration disks in the prior art, in actual use, due to the different sludge loads in the sewage, the use of oxygen with the same density and size cannot meet the aeration treatment of the sewage, resulting in a decrease in the efficiency of microbial decomposition of harmful substances. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a multi-stage series modular domestic sewage treatment system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-stage serial modular domestic sewage treatment system, comprising a grille tank, a sedimentation tank, a primary aeration tank, a sedimentation circulation tank, a secondary aeration tank, a subsurface wetland, and a water outlet tank, wherein the grille tank, the sedimentation tank, the primary aeration tank, the sedimentation circulation tank, the secondary aeration tank, the subsurface wetland, and the water outlet tank are sequentially connected in series, and a plurality of aeration cylinders are arranged in the primary aeration tank, the aeration cylinders are respectively connected to the air supply pipe and the circulation pipe, one end of the circulation pipe is connected to the sedimentation circulation tank, and the other end is installed in the primary aeration tank and connected to the aeration cylinder; The bottom of the aeration cylinder is provided with a mounting base, and the top is provided with a rubber membrane through a discharge plate, and the inside of the aeration cylinder is provided with a discharge cylinder and a ventilation column in sequence, an air cavity is left between the discharge cylinder and the aeration cylinder, and a grid plate is slidably installed in the middle of the ventilation column, and the outer side of the grid plate is adsorbed and connected with an inclined groove guide block through a magnetic suction slider, and the inclined groove guide block is connected to the mounting frame; A plurality of drainage ports are provided at the bottom end of the mounting base, which are communicated with a discharge barrel arranged inside the aeration barrel, and an impeller is installed at the middle part of the bottom end of the mounting base through a driving shaft, and the top end of the driving shaft passes through the mounting base and extends into the interior of the ventilation column, and a pneumatic rotating blade is installed at the middle part of the driving shaft, and the pneumatic rotating blade is arranged in the middle part of the ventilation column, and the ventilation column is installed inside the aeration barrel, and a discharge barrel is provided inside the aeration barrel, and an air cavity 1 is formed between the discharge barrel and the aeration barrel, and a discharge disk is provided at the top of the discharge barrel, and a plurality of discharge ports are provided on the outer side of the discharge disk, and the discharge ports are communicated with the interior of the discharge barrel, and a rubber membrane is installed at the upper end of the discharge disk through a diaphragm seat, and an air cavity 2 is formed between the rubber membrane and the discharge disk; A pair of sliding grooves are provided on both sides of the upper part of the ventilation column, and a grid plate is installed in the sliding groove for limited sliding, and a return spring is vertically installed between the bottom of the sliding groove and the grid plate, and magnetic sliders are installed at both ends of the outer side of the grid plate, and the magnetic slider is limitedly slidably installed in a limiting groove 1 opened on the inner wall of the discharge barrel, and a limiting groove 2 corresponding to the limiting groove 1 is opened on the outer wall of the discharge barrel, and one side of the limiting groove 2 is limitedly connected to the installation frame through an inclined groove guide block; A plurality of guide rods are provided on the upper part of the grid plate, one end of the guide rod passes through the top wall of the discharge tray and extends into the second air cavity, and the top end of each guide rod is connected to the mounting plate, the mounting plate is limitedly installed in the second air cavity, and a plurality of support springs are installed between the bottom of the mounting plate and the top wall of the discharge tray, and the support springs are correspondingly sleeved and installed on the outer side of each guide rod; An inclined slot guide block is installed in the limiting slot two for limiting sliding, a magnetic wall is arranged on the side of the inclined slot guide block facing the limiting slot two, the magnetic wall is magnetically connected to the magnetic attraction slider, and an inclined slot is provided at the other end of the inclined slot guide block, and a limiting column is installed in the inclined slot for limiting sliding through a connecting block; A limiting column is installed on one side of the connection block, and the other side is connected to the installation frame. A plurality of rubber sealing blocks are installed inside the installation frame, and the installation frame is limitedly slidably installed in an arc groove opened on the inner wall of the aeration cylinder. A plurality of air holes 2 are opened on the groove wall of the arc groove, and the rubber sealing block blocks the air holes 2 in a natural state; A plurality of guide rods are arranged on the upper part of the grid plate. The guide rods extend into the second cylinder arranged on the top of the aeration cylinder and are connected with a mounting plate. A plurality of conical columns are arranged on the mounting plate.

[0006] In addition, a preferred structure is that an air inlet pipe is provided on one side of the bottom of the aeration barrel, the air inlet pipe is connected to the air supply pipe, and exhaust nozzles 1 are provided on both sides of the middle of the air inlet pipe, the exhaust nozzles 1 are correspondingly installed in the air cavity 1, and a ventilation ring is provided on the side away from the exhaust nozzle 1, the ventilation ring is installed on the bottom inner wall of the discharge barrel, and a plurality of exhaust nozzles 2 are provided on the upper part of the ventilation ring, and a feed pipe is provided on the other side of the bottom of the aeration barrel, one end of the feed pipe is connected to the circulation pipe, and the other end is connected to the inside of the discharge barrel.

[0007] In addition, a preferred structure is that a plurality of guide blocks are installed on the outer side of the installation frame, and the guide blocks are limitedly slidably connected to the outer side wall of the arc-shaped groove.

[0008] In addition, a preferred structure is that the arc-shaped groove corresponds to the aeration wall opened on the outer wall of the aeration cylinder.

[0009] In addition, a preferred structure is that a plurality of conical columns are provided on the upper portion of the mounting plate, a plurality of convex strips are provided on the outer side of the conical columns, and a rubber membrane is provided above the conical columns, a plurality of air holes 1 are opened on the outer wall of the rubber membrane, and the air holes 1 correspond to and coincide with the center positions of the conical columns, and when the conical columns move upward, the conical columns are in squeeze contact with the air holes 1.

[0010] The beneficial effects of the present invention are: In the present invention, muddy water is treated by aeration in a multi-stage aeration tank, and according to different sludge loads, an aeration cylinder arranged in the aeration tank can adaptively change the height of its internal grille plate, and convert the displacement of the grille plate into the displacement of the corresponding mounting frame and mounting plate, and when the sludge load is too large, the mounting frame and mounting plate are linked to their corresponding mechanisms to open pore 1 and pore 2, thereby generating larger and denser oxygen bubbles, thereby promoting the reaction and reproduction efficiency of microorganisms, ensuring the decomposition efficiency of harmful substances, and improving the working efficiency of the aeration tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall module system structure of the multi-stage series modular domestic sewage treatment system proposed by the present invention; Figure 2 This is a schematic diagram of the internal structure of the primary aeration tank proposed by the present invention; Figure 3 Schematic diagram of the external structure of the aeration cylinder proposed by the present invention Figure 1 ; Figure 4 Schematic diagram of the external structure of the aeration cylinder proposed by the present invention Figure 2 ; Figure 5 A cross-sectional view of the internal structure of the aeration cylinder proposed by the present invention; Figure 6 A cross-sectional view of the internal structure of the ventilation column proposed by the present invention; Figure 7 A cross-sectional view of the discharging barrel installation structure proposed by the present invention; Figure 8 This is a schematic diagram of the air intake pipe connection structure proposed by the present invention; Fig. 9 A cross-sectional view of the internal structure of the discharge barrel proposed by the present invention; Fig.10 This is a schematic diagram of the installation structure of the chute guide block proposed by the present invention; Fig.11 This is an enlarged view of the installation structure of the chute guide block proposed by the present invention; Fig.12 This is a schematic diagram of the installation structure of the installation frame proposed by the present invention; Fig.13 This is a schematic diagram of the connection structure of the chute guide block and the connection block proposed by the present invention; Fig.14 This is a schematic diagram of the installation structure of the rubber sealing block proposed by the present invention; Fig.15 A cross-sectional view of the internal structure of the second air cavity proposed by the present invention; Fig.16 It is a plan view of the internal structure of the second air cavity proposed by the present invention; Fig.17 This is a schematic diagram of the tapered column installation structure proposed by the present invention.

[0012] In the figure: 1. grid pool; 2. sedimentation tank; 3. primary aeration tank; 4. sedimentation circulation tank; 41. circulation pipe; 5. secondary aeration tank; 51. aeration plate; 6. subsurface wetland; 7. outlet tank; 8. air supply pipe; 9. aeration cylinder; 10. rubber membrane; 101. air hole 1; 11. mounting base; 12. air inlet pipe; 121. exhaust nozzle 1; 122. ventilation ring; 123. exhaust nozzle 2; 13. feed pipe; 14. discharge cylinder; 141. discharge plate; 142. discharge port; 15. aeration wall; 151. air hole 2; 16. impeller; 17. drainage port; 18. diaphragm seat ;19. Ventilation column;191. Air inlet;192. Sliding groove;193. Reset spring;20. Pneumatic rotary blade;21. Grille plate;211. Magnetic slider;22. Guide rod;23. Drive shaft;24. Limiting groove one;241. Limiting groove two;25. Air cavity one;26. Air cavity two;27. Mounting frame;271. Rubber sealing block;272. Connecting block;2721. Limiting column;28. Bevel groove guide block;281. Magnetic wall;29. Guide block;30. Arc groove;31. Mounting plate;32. Support spring;33. Conical column;331. Raised strip. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0015] Reference Figure 1-2 A multi-stage serial modular domestic sewage treatment system includes a grille tank 1, a sedimentation tank 2, a primary aeration tank 3, a sedimentation circulation tank 4, a secondary aeration tank 5, a subsurface wetland 6, and an outlet tank 7, wherein the grille tank 1, the sedimentation tank 2, the primary aeration tank 3, the sedimentation circulation tank 4, the secondary aeration tank 5, the subsurface wetland 6, and the outlet tank 7 are connected in series with each other, and are located between the primary aeration tank 3 and the sedimentation circulation tank 4 and are circulated and connected through a circulation pipe 41.

[0016] Among them, the sewage enters through the grid pool 1, and the grid pool 1 removes large suspended matter in the sewage, such as plastic bags, branches, paper, etc., to prevent these substances from clogging or damaging subsequent treatment equipment. At the same time, the grid pool 1 is the first process of the sewage treatment system. The grid pool 1 provides cleaner water for the subsequent treatment process, which helps to reduce the burden of the subsequent treatment process. By removing suspended matter, the grid pool can ensure the smooth operation of the entire sewage treatment system, thereby improving the treatment efficiency of the entire system.

[0017] Among them, multiple groups of aeration cylinders 9 are arranged in the first-level aeration tank 3, and a rubber membrane 10 is arranged on the upper part of the aeration cylinder 9 to discharge oxygen, and the two sides of the bottom of the aeration cylinder 9 are respectively connected to the air supply pipe 8 and the circulation pipe 41, wherein the air inlet end of the air supply pipe 8 is connected to the external air pump, and the inlet end of the circulation pipe 41 is connected to the sedimentation circulation tank 4.

[0018] At this time, in the initial treatment stage of the primary aeration tank 3, the sewage still contains most of the organic matter and suspended matter, the activities of the organic matter and suspended matter are relatively intensive and active, and a large number of oxygen bubbles generated by multiple groups of aeration cylinders 9 are used to cultivate the microorganisms inside them.

[0019] In addition, a plurality of aeration plates 51 are arranged at the bottom of the secondary aeration tank 5, and the aeration plates 51 are connected to the air supply pipe 8 for air supply. The secondary aeration tank 5 continues to aerate the sewage treated in the primary aeration tank 3, wherein the sewage treated in the primary aeration tank 3 will enter the secondary aeration tank 5, at which time the contents of organic matter, suspended matter, and flocs have been greatly reduced, so the metabolic activity of the microorganisms is relatively weak, and the sludge load thereof is reduced. At this time, further aeration treatment is performed through the aeration plates 51 arranged therein, wherein the sludge load in the secondary aeration tank 5 is relatively low, and oxygen bubbles can be generated through the aeration plates 51 and a longer residence time can be formed to ensure sufficient degradation of the pollutants.

[0020] Reference Figure 3-6 A mounting base 11 is provided at the bottom end of the aeration cylinder 9, and an air inlet pipe 12 and a feed pipe 13 are respectively provided on both sides of the bottom end of the cylinder wall to connect the air supply pipe 8 and the circulation pipe 41, and a discharge tray 141 is provided at the upper part of the aeration cylinder 9, a discharge port 142 is opened on the outer side of the discharge tray 141, and a diaphragm seat 18 is installed on the upper part of the discharge tray 141, and a rubber membrane 10 is provided on the upper part of the diaphragm seat 18. The rubber membrane 10 is spherical crown-shaped, and the holes are evenly stressed during operation, the degree of fatigue deformation is reduced, the resilience is good, it is not easy to tear, and the service life is long. Under the natural state, the air pressure generated by the ventilation column 19 will cause the rubber membrane 10 to expand and deform, and the deformed micropores will pass oxygen and squeeze to produce corresponding bubbles.

[0021] In addition, aeration walls 15 are symmetrically arranged on both sides of the outer wall of the aeration cylinder 9, and the aeration walls 15 generate oxygen bubbles through an external air pump.

[0022] Furthermore, a discharge barrel 14 is provided inside the aeration barrel 9, a ventilation column 19 is provided inside the discharge barrel 14, and a pneumatic rotating blade 20 is provided inside the ventilation column 19 to rotate through a drive shaft 23. The pneumatic rotating blade 20 is rotated by the push of the airflow to synchronously rotate the drive shaft 23, and synchronously drives the impeller 16 provided in the middle of the mounting base 11 to rotate, and the impeller 16 guides the water flow at the bottom of the pool during the rotation.

[0023] Among them, a plurality of drainage ports 17 are opened on the outer side of the bottom end of the mounting base 11, and an impeller 16 is rotatably installed in the middle of the bottom end of the mounting base 11, one end of the impeller 16 is fixedly connected to the drive shaft 23, one end of the drive shaft 23 passes through the mounting base 11 and extends into the interior of the ventilation column 19, and is rotatably installed in the interior of the ventilation column 19 through a mounting frame, and a pneumatic rotating blade 20 is fixedly installed in the middle of the drive shaft 23.

[0024] Among them, the top of the discharge barrel 14 is connected to a discharge plate 141, the top of the discharge plate 141 is installed with a rubber membrane 10 through a diaphragm seat 18, and an air cavity 26 is formed between the top wall of the discharge plate 141 and the rubber membrane 10, and the bottom of the air cavity 26 is connected to a ventilation column 19, which realizes the transportation of oxygen.

[0025] In addition, a grid plate 21 is installed on the outer side of the ventilation column 19 in a limited sliding manner. The grid plate 21 is limitedly installed on the inner wall of the discharge barrel 14. The slot gap set by the grid plate 21 can intercept some flocs and sludge in the muddy water and allow part of the water flow to pass through. At this time, a certain driving force is generated on the grid plate 21 through the adhesion of the water flow and flocs. At this time, the grid plate 21 is displaced by the action of the flocs, sludge, muddy water and water flow.

[0026] Furthermore, an air inlet pipe 12 is provided on one side of the aeration cylinder 9, one end of which passes through the aeration cylinder 9 and the discharge cylinder 14 in sequence and is connected to the interior of the ventilation column 19, wherein an air inlet 191 is provided on one side of the bottom of the ventilation column 19 to connect the ventilation column 19, and under the pumping action of the external air pump, oxygen will be continuously fed into the air inlet pipe 12, and when passing through the exhaust nozzle 121, the oxygen will be continuously introduced into the corresponding air cavity 1 25 until its internal cavity is filled, and the oxygen will continue to be fed into the exhaust nozzle 2 123 connected to the air inlet pipe 12, and the exhaust nozzle 2 123 will also discharge the corresponding oxygen gas, and at the same time, the entire cavity of the inner wall of the aeration cylinder 9 will be supplied with air, and then the oxygen will continue to be diverted and transported to the ventilation column 19, and with the guiding design of the column body of the ventilation column 19, the gas will be guided into the air cavity 2 26 at the top of the aeration cylinder 9, and the gas in the air cavity 26 will be gradually filled.

[0027] Among them, a feed pipe 13 is provided on one side of the aeration cylinder 9, and one end of the feed pipe 13 is connected to the inside of the discharge cylinder 14. After the reaction in the primary aeration tank 3 is completed, the sewage enters the sedimentation circulation tank 4 for sedimentation treatment. At this time, the flocs formed by the reaction of microorganisms and mud water are precipitated to the bottom, and the sewage containing mixed flocs at the bottom is circulated into the circulation pipe 41 by the action of an external sludge pump and a circulation pipe 41. The circulation pipe 41 is connected to the feed pipe 13, and the feed pipe 13 re-sends the flocs containing microorganisms into the aeration cylinder 9. The aeration cylinder 9 continues to mix, stir and transport the untreated sewage and the flocs containing microorganisms to improve the reaction efficiency.

[0028] Reference Figure 7 , 10-11, a pair of sliding grooves 192 are provided on both sides of the upper part of the ventilation column 19, and a grid plate 21 is installed in the sliding groove 192 for limiting sliding. Both ends of the outer side of the grid plate 21 are fixedly installed with magnetic sliders 211, and the magnetic slider 211 is installed in a limiting sliding position in a limiting groove 24 provided on the inner wall of the discharge barrel 14. Under the action of magnetic adsorption, the magnetic slider 211 is separated from the limiting groove 24 and synchronously drives the inclined groove guide block 28 with the magnetic wall 281 to move, and because the magnetic surfaces of the magnetic slider 211 and the magnetic wall 281 correspond to each other and synchronous displacement is achieved through magnetic adsorption, under the action of the movement of the grid plate 21, the inclined groove guide block 28 symmetrically arranged therewith moves accordingly.

[0029] Among them, a return spring 193 is arranged at the inner bottom of the sliding groove 192, the top end of the return spring 193 is connected to the grille plate 21, and the return spring 193 is connected to the inner wall of the grille plate 21, and as the grille plate 21 moves and displaces, the return spring 193 deforms to a certain extent and generates a corresponding force, and when the grille plate 21 is affected by the driving force and displaces upward, the return spring 193 stretches to generate a downward force; and as the thrust of the water flow decreases, the return spring 193 elastically resets and synchronously drives the grille plate 21 to move downward to tend to reset.

[0030] The inner wall of the magnetic slider 211 facing the limiting groove 1 24 is magnetic, thereby achieving the function of magnetic adsorption between the two.

[0031] Reference Figure 8 Exhaust nozzles 121 are provided on both sides of the middle of the air inlet pipe 12, and the exhaust nozzles 121 are correspondingly installed in the air cavity 25, and a ventilation ring 122 is provided on the side away from the exhaust nozzle 121, and the ventilation ring 122 is installed on the bottom inner wall of the discharge barrel 14, and a plurality of exhaust nozzles 123 are provided on the upper part of the ventilation ring 122 to discharge oxygen, and as the exhaust nozzle 121 continues to spray oxygen, the air cavity 25 will be initially filled and a certain air pressure will be generated, and when the aeration wall 15 and its corresponding mechanism are triggered, the gas in the air cavity 25 is sprayed out along with the multiple air holes opened in the aeration wall 15 to form oxygen bubbles.

[0032] Reference Figure 5 , 9 -14, limiting grooves 24 are provided on both sides of the inner wall of the discharge barrel 14, and the limiting grooves 24 are connected to the grid plate 21 by a magnetic slider 211 for limiting sliding, wherein a limiting groove 241 is provided on the other side of the limiting groove 24, and the limiting groove 241 is correspondingly provided on the outer wall of the discharge barrel 14, and a chute guide block 28 is installed in the limiting groove 241 for limiting sliding, wherein the inner wall of the chute guide block 28 is provided with a magnetic wall 281, and the magnetic wall 281 is magnetically adsorbed and connected to the magnetic slider 211 accordingly.

[0033] Among them, an inclined groove is opened on the outer side of the inclined groove guide block 28, and a limiting column 2721 is installed in the inclined groove for limiting sliding. The other end of the limiting column 2721 is fixedly installed on the connecting block 272, and one end of the connecting block 272 is connected to the mounting frame 27. The mounting frame 27 is limited and slidably installed in the arc groove 30 opened inside the aeration cylinder 9, wherein the arc groove 30 corresponds to the aeration wall 15, and a plurality of air holes 151 are opened on the groove wall, and a rubber sealing block 271 is arranged on the side away from the air holes 151, and the rubber sealing block 271 is limited and installed inside the mounting frame 27.

[0034] Among them, under the guidance of the inclined groove, the limiting column 2721 installed in the inclined groove produces a displacement. At this time, the limiting column 2721 is displaced and synchronously drives the installation frame 27 connected thereto to deflect to a certain extent. As the installation frame 27 rotates as a whole, the installation frame 27 deflects in the arc groove 30. Due to the setting of the guide block 29, the guide block 29 limits the whole and ensures that it will not fall or deflect during the deflection of the installation frame 27. At the same time, corresponding air holes are opened on the aeration wall 15 corresponding to one side of the arc groove 30. As the installation frame 27 deflects, the corresponding air holes are gradually turned from the original blocked state to the open state. At this time, the oxygen filled in the air cavity 25 will be continuously delivered into the air holes, and oxygen bubbles are formed by a number of micropores to supply oxygen to the muddy water.

[0035] And as the deformation of the mounting frame 27 increases, the overall deflection angle of the mounting frame 27 will continue to increase, and the deflection angle is related to the chute length of the chute guide block 28. Therefore, under the guidance of the chute, when the limit column 2721 moves to the end of its chute, the mounting frame 27 is completely deflected, and the pores on the aeration wall 15 are all opened. At this time, the oxygen in the air cavity 25 will be delivered into the pool in large quantities and fully effectively to react to the large number of microorganisms in the muddy water.

[0036] A plurality of guide blocks 29 are installed on the top and bottom sides of the outer wall of the installation frame 27 . The guide blocks 29 are installed on the outer side wall of the arc groove 30 in a limited sliding manner to ensure the installation and sliding stability of the installation frame 27 .

[0037] Furthermore, a plurality of guide rods 22 are provided on the upper portion of the grid plate 21, one end of the guide rod 22 extends upward and passes through the top wall of the discharge tray 141 and extends into the interior of the air cavity 26, and at the same time, the top end of each guide rod 22 is connected to the mounting plate 31, the mounting plate 31 is limitedly installed below the rubber membrane 10, and a plurality of support springs 32 are installed at the bottom of the mounting plate 31, and the support springs 32 are correspondingly sleeved and installed on the outer side of each guide rod 22.

[0038] A dynamic seal is provided at the connection between the guide rod 22 and the discharge tray 141 to ensure sealing, wherein the specific sealing principle of the dynamic seal is already a prior art and is a conventional setting in the art.

[0039] Reference Figure 15-17 A plurality of conical columns 33 are equidistantly arranged on the upper part of the mounting plate 31, a plurality of convex strips 331 are arranged on the outer side of the conical columns 33, and a rubber membrane 10 is arranged above the conical columns 33, the outer side of the rubber membrane 10 is sealed and connected to the diaphragm seat 18, and a plurality of air holes 101 are opened on the outer wall of the rubber membrane 10, and the air holes 101 coincide with the center positions of the conical columns 33, and when the conical columns 33 go up, the conical columns 33 are squeezed and contacted with the air holes 101.

[0040] In this embodiment, untreated sewage is introduced through the grid pool 1, wherein the grid pool 1 is provided with corresponding grid nets and filter nets to intercept and remove large particles of suspended matter in the sewage, and then the sewage enters the sedimentation tank 2 to remove part of the suspended matter through sedimentation, and then the upper liquid phase enters the primary aeration tank 3 for aeration treatment. In the primary aeration tank 3, since most of the organic matter and suspended matter in the sewage need to be removed, the metabolic activity of the microorganisms is relatively vigorous, and therefore a large amount of oxygen is usually required to support this process. Specifically, both the degradation of organic matter and the removal of suspended matter require sufficient oxygen to maintain the respiratory metabolism of the microorganisms. In the primary aeration tank 3, sufficient large bubbles and high-density oxygen are adaptively injected into the sewage through multiple groups of aeration cylinders 9, and adjustments are made according to the real-time sludge load, thereby ensuring that the microorganisms can make full use of the organic matter for growth and reproduction, while removing the organic matter and suspended matter in the sewage.

[0041] After the reaction in the primary aeration tank 3 is completed, the sewage enters the sedimentation circulation tank 4 for sedimentation treatment, and the flocs formed by the reaction of microorganisms and mud water are settled to the bottom, and are circulated and transported to the aeration cylinder 9 by an external sludge pump in cooperation with the circulation pipe 41. Relatively speaking, the upper liquid phase continues to be transported to the secondary aeration tank 5. Since the sewage has been treated in the primary aeration tank 3, the content of organic matter and suspended matter has been greatly reduced. Therefore, the metabolic activity of the microorganisms is relatively weak, and the sludge load is reduced. At this time, further aeration treatment is carried out through the aeration disk 51 arranged inside it.

[0042] Then, the treated sewage is filtered through the subsurface wetland 6 and finally discharged from the outlet pool 7, completing the multi-stage series sewage treatment and purification process.

[0043] In the actual treatment of the primary aeration tank 3, a plurality of aeration cylinders 9 are arranged in the primary aeration tank 3, and the interior of the aeration cylinders 9 is connected to the air supply pipe 8 to introduce oxygen. When sewage enters the tank, the air supply pipe 8 is pumped with oxygen gas by an external air pump. Under the action of high-speed gas push, the air supply pipe 8 pumps the oxygen into the ventilation column 19. The ventilation column 19 is provided with pneumatic rotating blades 20. The pneumatic rotating blades 20 are driven by the air flow to rotate at a high speed. During the rotation, the impeller 16 arranged in the middle of the mounting base 11 is synchronously driven by the driving shaft 23. As the impeller 16 The large floccules deposited at the bottom are guided by the water flow and enter the inside of the mounting base 11 and enter the discharge barrel 14 through the drainage port 17. The top of the discharge barrel 14 is provided with a discharge tray 141 to form a channel for the circulation of sludge. When the muddy water enters the discharge barrel 14, the sludge contacts the grid plate 21 provided inside the discharge barrel 14 and passes through the grid plate 21. The sludge is finally discharged through the discharge port 142 provided on the outside of the discharge tray 141. As the oxygen is continuously transported, the oxygen in the air inlet pipe 12 is discharged into the top air cavity 26. The gas in the air cavity 26 is filled with The gas pressure is generated by filling the pile, and the external rubber film 10 is squeezed to deform it, wherein the rubber film 10 is spherical, and the holes are evenly stressed during operation, the fatigue deformation degree is reduced, the resilience is good, it is not easy to tear, and the service life is long. At this time, the micropores deformed by the air pressure will discharge oxygen bubbles, and the multiple exhaust nozzles 123 arranged inside the discharge barrel 14 will discharge oxygen synchronously, and react with the muddy water entering the discharge barrel 14, and discharge it synchronously from the discharge port 142. After the reaction in the primary aeration tank 3 is completed, the sewage will be discharged into the sedimentation circulation tank 4 Internal sedimentation treatment, at this time, the flocs produced by the reaction of the treated microorganisms and sewage are precipitated to the bottom of the tank, and under the pumping action of the external sludge pump, the flocs produced by the reaction of the microorganisms and sewage are transported to the circulation pipe 41, and are further sent to the feed pipe 13 through the circulation pipe 41 for connection, and because the feed pipe 13 is connected to the multiple aeration cylinders 9 in the primary aeration tank 3, the flocs containing microorganisms are re-sent into the aeration cylinder 9, and the untreated sewage and the flocs containing microorganisms are continued to be mixed, stirred and transported in the aeration cylinder 9 to improve the reaction efficiency.

[0044] Among them, due to the rotation of the impeller 16, its blades will exert force on the muddy water near the bottom of the pool, so that it gains kinetic energy, and the fluid is accelerated under the action of the blades, and is thrown out along the tangential direction of the blades to form centrifugal force. This centrifugal force makes the fluid (including sewage and flocs therein) move with the impeller 16, and the blade angle design of the impeller 16 is used to achieve the diversion effect on the sewage, and in conjunction with the tubular design of the aeration cylinder 9, this allows the muddy water at the bottom to be continuously transported upward, and the flocs containing microorganisms that circulate in synchronously move synchronously.

[0045] Among them, as the aeration volume increases, the dissolved oxygen content in the wastewater increases and the activity of microorganisms also increases, thereby accelerating the decomposition and transformation of organic matter and improving the COD removal rate.

[0046] Among them, in actual use, the grid plate 21 intercepts part of the flocs and sludge in the muddy water, and generates a certain driving force on the grid plate 21. At this time, the grid plate 21 moves upward under the action of the flocs, sludge, muddy water and water flow. Synchronously, the magnetic sliders 211 arranged on both sides of the grid plate 21 slide in the limit groove 24 on the inner wall of the discharge barrel 14, and under the action of magnetic adsorption, the magnetic sliders 211 are separated by the limit groove 24 and synchronously drive the inclined groove guide block 28 with the magnetic wall 281 to move. A corresponding inclined groove is opened on the outer side of the inclined groove guide block 28. Under the guiding action of the inclined groove, the limit column 2721 installed in the inclined groove is displaced. At this time, the limit column 2721 synchronously drives the installation frame 27 to deflect to a certain extent.

[0047] Among them, the return spring 193 is connected to the inner wall of the grille plate 21, and as the grille plate 21 moves, the return spring 193 deforms to a certain extent and generates a corresponding force, and when the grille plate 21 is affected by the driving force and moves upward, the return spring 193 stretches to generate a downward force; and as the thrust of the water flow decreases, the return spring 193 elastically resets and synchronously drives the grille plate 21 to move downward to tend to reset.

[0048] Among them, when the sludge load in the primary aeration tank 3 is large, the sludge and floc content in the muddy water is relatively high, the floc intercepted by the grid plate 21 increases, and the cross-sectional area subjected to the force increases. The floc that is not dispersed in time will gradually adhere to the grid plate 21 in large quantities, and under the continuous push of the water flow, the upward stroke of the grid plate 21 increases accordingly.

[0049] Correspondingly, the upward stroke of the multiple groups of chute guide blocks 28 arranged on the outside of the discharge barrel 14 increases accordingly, and under the guidance of the chute, the deflection amplitude of the mounting frame 27 increases, and with the deflection of the mounting frame 27, the multiple rubber sealing blocks 271 arranged in the middle move and gradually separate from the air hole 2 151 set on the aeration wall 15. At this time, the air hole 2 151 is connected with the air cavity 1 25, and with the input of oxygen from the exhaust nozzle 121, the air cavity 1 25 will be initially filled and a certain air pressure will be generated. When the aeration wall 15 and its corresponding mechanism are triggered successively, the gas in the air cavity 1 25 is ejected along with the multiple air holes opened in the aeration wall 15 to form oxygen bubbles, and the air hole 2 151 discharges the bubbles.

[0050] At the same time, as the grid plate 21 moves upward, the guide rod 22 pushes up and drives the mounting plate 31 set in the air cavity 26 to move upward. A plurality of conical columns 33 are set on the mounting plate 31, and a plurality of conical convex strips 331 are set on the outer side of the conical column 33. During the overall upward movement of the conical column 33, the conical column 33 will be inserted into the rubber membrane 10 set above it and the corresponding pore 101 set on the rubber membrane 10, and the pore wall will be squeezed and expanded, so that the pore 101 will deform and expand due to the characteristics of the rubber material, and as the middle part of the conical column 33 is inserted, its expansion area will gradually increase, thereby producing larger oxygen bubbles to meet the microbial reaction.

[0051] In the actual use process, the support spring 32 plays the role of support and reset to ensure the stability of the mounting plate 31 during the upward process and the reset function after the upward movement.

[0052] It is worth noting that the air inlet pipe 12 pumps oxygen out through the ventilation ring 122 and the exhaust nozzle 123, and the exhaust nozzle 123 sprays air upward, so the flocs attached to the grid plate 21 can be dispersed to prevent them from attaching to the grid plate 21 and affecting normal circulation and use.

[0053] In the present invention, the muddy water is aerated by a multi-stage aeration tank, and according to the different sludge loads, the aeration cylinder 9 arranged in the aeration tank can adaptively change the height of the internal grid plate 21 thereof, and convert the displacement of the grid plate 21 into the corresponding displacement of the mounting frame 27 and the mounting plate 31, and when the sludge load is too large, the mounting frame 27 and the mounting plate 31 are linked with their corresponding mechanisms to open the air hole 101 and the air hole 2 151, thereby generating larger and denser oxygen bubbles, thereby promoting the reaction and reproduction efficiency of microorganisms, ensuring the decomposition efficiency of harmful substances, and improving the working efficiency of the aeration tank.

[0054] Among them, in the primary aeration tank 3, in order to remove the sewage introduced from the grid tank 1, most of the organic matter and suspended matter still exist in the sewage, and the metabolic activity of the microorganisms is relatively vigorous. Therefore, the traditional aeration disc assembly cannot meet the operation and reaction of the microorganisms at this time. Therefore, with the grid plate 21 set in the aeration cylinder 9, the sludge load can be effectively sensed, and the aeration wall 15 and the rubber membrane 10 can be stimulated through the corresponding linkage assembly, thereby generating a larger and denser amount of oxygen to support this process, thereby ensuring the degradation of organic matter and the removal of suspended matter.

[0055] And as the sludge content increases, the sludge load in the primary aeration tank 3 is larger, and the grid plate 21, through its grid design, will intercept most of the flocs and sludge inside the aeration cylinder 9, and generate a certain driving force on the grid plate 21. At this time, the flocs, sludge and muddy water in the grid plate 21 tube move upward, and stimulate the aeration wall 15 to open through the corresponding linkage components to pass oxygen.

[0056] Then, in the secondary aeration tank 5, the sewage has been preliminarily treated by the multiple groups of aeration cylinders 9 components arranged in the primary aeration tank 3, and the content of a large amount of organic matter and suspended matter in the sewage has been greatly reduced by the primary aeration tank 3. At this time, the sludge load in the secondary aeration tank 5 is already less than that in the primary aeration tank 3, so there is no need for a large amount of intensive oxygen supply like in the primary aeration tank 3. At this time, the metabolic activities of a small number of microorganisms are weaker than those in the primary aeration tank 3. At this time, a certain amount of oxygen is still needed to support the further degradation of organic matter and conversion of pollutants such as ammonia nitrogen by the microorganisms. Therefore, by setting a conventional aeration disk 51, the microorganisms in the tank can operate normally. However, compared with the primary aeration tank 3, although the amount of oxygen required by the secondary aeration tank 5 is usually smaller, it is still necessary to control the air pump components to avoid the problem of excessive power or too low power, so that more oxygen can be absorbed and utilized by the water body, while reducing energy consumption.

[0057] At the same time, when the sludge load is less than the trigger stroke of the grid plate 21, the corresponding air hole 2 151 will not open, and the air hole 1 101 will not expand, thereby avoiding energy waste.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-stage serial modular domestic sewage treatment system, comprising a grid tank, a sedimentation tank, a primary aeration tank, a sedimentation circulation tank, a secondary aeration tank, a subsurface wetland, and an outlet tank, characterized in that: The grid tank, sedimentation tank, primary aeration tank, sedimentation circulation tank, secondary aeration tank, subsurface wetland, and outlet tank are connected in series in sequence, and multiple groups of aeration cylinders are arranged in the primary aeration tank, the aeration cylinders are connected to the air supply pipe and the circulation pipe respectively, one end of the circulation pipe is connected to the sedimentation circulation tank, and the other end is installed in the primary aeration tank and connected to the aeration cylinder; The bottom of the aeration cylinder is provided with a mounting base, and the top is provided with a rubber membrane through a discharge plate, and the inside of the aeration cylinder is provided with a discharge cylinder and a ventilation column in sequence, an air cavity is left between the discharge cylinder and the aeration cylinder, and a grid plate is slidably installed in the middle of the ventilation column, and the outer side of the grid plate is adsorbed and connected with an inclined groove guide block through a magnetic suction slider, and the inclined groove guide block is connected to the mounting frame; A plurality of drainage ports are provided at the bottom end of the mounting base, which are communicated with a discharge barrel arranged inside the aeration barrel, and an impeller is installed at the middle part of the bottom end of the mounting base through a driving shaft, and the top end of the driving shaft passes through the mounting base and extends into the interior of the ventilation column, and a pneumatic rotating blade is installed at the middle part of the driving shaft, and the pneumatic rotating blade is arranged in the middle part of the ventilation column, and the ventilation column is installed inside the aeration barrel, and a discharge barrel is provided inside the aeration barrel, and an air cavity 1 is formed between the discharge barrel and the aeration barrel, and a discharge disk is provided at the top of the discharge barrel, and a plurality of discharge ports are provided on the outer side of the discharge disk, and the discharge ports are communicated with the interior of the discharge barrel, and a rubber membrane is installed at the upper end of the discharge disk through a diaphragm seat, and an air cavity 2 is formed between the rubber membrane and the discharge disk; A pair of sliding grooves are provided on both sides of the upper part of the ventilation column, and a grid plate is installed in the sliding groove for limited sliding, and a return spring is vertically installed between the bottom of the sliding groove and the grid plate, and magnetic sliders are installed at both ends of the outer side of the grid plate, and the magnetic slider is limitedly slidably installed in a limiting groove 1 opened on the inner wall of the discharge barrel, and a limiting groove 2 corresponding to the limiting groove 1 is opened on the outer wall of the discharge barrel, and one side of the limiting groove 2 is limitedly connected to the installation frame through an inclined groove guide block; A plurality of guide rods are provided on the upper part of the grid plate, one end of the guide rod passes through the top wall of the discharge tray and extends into the second air cavity, and the top end of each guide rod is connected to the mounting plate, the mounting plate is limitedly installed in the second air cavity, and a plurality of support springs are installed between the bottom of the mounting plate and the top wall of the discharge tray, and the support springs are correspondingly sleeved and installed on the outer side of each guide rod; An inclined slot guide block is installed in the limiting slot two for limiting sliding, a magnetic wall is arranged on the side of the inclined slot guide block facing the limiting slot two, the magnetic wall is magnetically connected to the magnetic attraction slider, and an inclined slot is provided at the other end of the inclined slot guide block, and a limiting column is installed in the inclined slot for limiting sliding through a connecting block; A limiting column is installed on one side of the connection block, and the other side is connected to the installation frame. A plurality of rubber sealing blocks are installed inside the installation frame, and the installation frame is limitedly slidably installed in an arc groove opened on the inner wall of the aeration cylinder. A plurality of air holes 2 are opened on the groove wall of the arc groove, and the rubber sealing block blocks the air holes 2 in a natural state; A plurality of guide rods are arranged on the upper part of the grid plate. The guide rods extend into the second cylinder arranged on the top of the aeration cylinder and are connected with a mounting plate. A plurality of conical columns are arranged on the mounting plate.

2. The multi-stage series modular domestic sewage treatment system according to claim 1 is characterized in that: An air inlet pipe is provided on one side of the bottom of the aeration cylinder, the air inlet pipe is connected to the air supply pipe, and exhaust nozzles 1 are provided on both sides of the middle of the air inlet pipe, the exhaust nozzles 1 are correspondingly installed in the air cavity 1, and a ventilation ring is provided on the side away from the exhaust nozzle 1, the ventilation ring is installed on the bottom inner wall of the discharge cylinder, and a plurality of exhaust nozzles 2 are provided on the upper part of the ventilation ring, and a feed pipe is provided on the other side of the bottom of the aeration cylinder, one end of the feed pipe is connected to the circulation pipe, and the other end is connected to the inside of the discharge cylinder.

3. The multi-stage serial modular domestic sewage treatment system according to claim 1 is characterized in that: A plurality of guide blocks are installed on the outer side of the installation frame, and the guide blocks are limitedly and slidably connected with the outer side wall of the arc-shaped groove.

4. The multi-stage series modular domestic sewage treatment system according to claim 3 is characterized in that: The arc-shaped groove corresponds to the aeration wall provided on the outer wall of the aeration cylinder.

5. The multi-stage serial modular domestic sewage treatment system according to claim 1 is characterized in that: A plurality of conical columns are provided on the upper part of the mounting plate, a plurality of convex strips are provided on the outer side of the conical columns, and a rubber membrane is provided above the conical columns, a plurality of air holes 1 are opened on the outer wall of the rubber membrane, and the air holes 1 correspond to and coincide with the center positions of the conical columns, and when the conical columns go up, the conical columns are in squeeze contact with the air holes 1.

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