Multi-stage series modular domestic sewage treatment system

Abstract

The present invention relates to the field of sewage treatment, and particularly to a multi-stage series modular domestic sewage treatment system, which is provided with a grille tank, a sedimentation tank, a primary aeration tank, a sedimentation circulation tank, a secondary aeration tank, a subsurface flow wetland, and an effluent tank connected in series in sequence. A plurality of aeration cylinders are arranged in the primary aeration tank, and the aeration cylinders are respectively communicated with an air supply pipe and a circulation pipe. One end of the circulation pipe is communicated with the sedimentation circulation tank, and the other end is installed in the primary aeration tank and connected to the aeration cylinder. In the present invention, the sludge water is treated by aeration in the multi-stage aeration tank. According to different sludge loads, the aeration cylinders arranged in the aeration tank can adaptively change the height of the internal grille plates, and the displacement of the grille plates is converted into the displacement amounts of the corresponding mounting frames and mounting plates. When the sludge load is too large, air holes one and two are opened to generate larger 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.

Description

Technical Field

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

[0002] A domestic sewage treatment system refers to a series of facilities for collecting and treating domestic sewage generated in daily life to prevent environmental pollution and ensure public health. Domestic sewage mainly comes from families, commerce, public facilities, etc., and contains a large amount of organic matter, nutrients such as nitrogen and phosphorus, pathogens, and harmful substances such as heavy metals.

[0003] Domestic sewage treatment requires multi-stage modular treatment such as grid filtration, aeration treatment, and sedimentation. When the sewage is subjected to aeration treatment, the contact between the sewage and air oxygen can accelerate the growth of microorganisms in the water and sludge, and the decomposition of harmful substances in the water is achieved through microorganisms. Although the basic aeration operation is realized by an aeration disk in the prior art, in the actual use process, due to the different sludge loads in the sewage, using the same density and amount of oxygen cannot meet the aeration treatment of the sewage, resulting in a phenomenon of reduced efficiency of microorganisms decomposing harmful substances. Summary of the Invention

[0004] The purpose of the present invention is to solve the drawbacks existing in the prior art, and a multi-stage series modular domestic sewage treatment system is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A multi-stage series modular domestic sewage treatment system includes a grid tank, a sedimentation tank, a primary aeration tank, a sedimentation circulation tank, a secondary aeration tank, a subsurface flow wetland, and an effluent tank. The grid tank, sedimentation tank, primary aeration tank, sedimentation circulation tank, secondary aeration tank, subsurface flow wetland, and effluent tank are connected in series in sequence, and a plurality of groups of aeration cylinders are arranged in the primary aeration tank. The aeration cylinders are respectively connected to an air supply pipe and a 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;

[0007] An installation base is arranged at the bottom of the aeration cylinder, and a rubber membrane is arranged at the top through a discharge tray. A discharge cylinder and a ventilation column are sequentially arranged inside the aeration cylinder. An air chamber one is left between the discharge cylinder and the aeration cylinder, and a grid plate is installed in the middle of the ventilation column in a limited sliding manner. The outer side of the grid plate is connected to an inclined groove guide block through a magnetic attraction slider, and the inclined groove guide block is connected to a mounting frame body;

[0008] A plurality of drainage ports are provided at the bottom end of the installation base. The drainage ports are communicated with a discharge cylinder arranged inside the aeration cylinder. An impeller is installed at the middle part of the bottom end of the installation base through a drive shaft. The top end of the drive shaft passes through the installation base and extends into the ventilation column. A pneumatic rotary blade is installed in the middle of the drive shaft. The pneumatic rotary blade is arranged in the middle of the ventilation column. The ventilation column is installed inside the aeration cylinder. A discharge cylinder is arranged inside the aeration cylinder. An air cavity one is formed between the discharge cylinder and the aeration cylinder. A discharge tray is provided at the top of the discharge cylinder. A plurality of discharge ports are provided on the outer side of the discharge tray. The discharge ports are communicated with the inside of the discharge cylinder. A rubber membrane is installed on the upper end of the discharge tray through a diaphragm seat. An air cavity two is formed between the rubber membrane and the discharge tray;

[0009] A pair of sliding grooves are provided on both sides of the upper part of the ventilation column. A grille plate is installed in the sliding grooves in a limited sliding manner. A return spring is installed vertically between the bottom of the sliding groove and the grille plate. Magnetic attraction sliders are installed at both outer ends of the grille plate. The magnetic attraction sliders are installed in a limited sliding manner in a limiting groove one opened on the inner wall of the discharge cylinder. A limiting groove two corresponding to the limiting groove one is opened on the outer wall of the discharge cylinder. One side of the limiting groove two is connected with an installation frame body through an inclined groove guide block in a limiting manner;

[0010] A plurality of guide rods are provided on the upper part of the grille plate. One end of each guide rod passes through the top wall of the discharge tray and extends into the air cavity two. The top end of each guide rod is connected with an installation plate. The installation plate is installed in the air cavity two in a limiting manner. A plurality of support springs are installed between the bottom of the installation plate and the top wall of the discharge tray. The support springs are correspondingly sleeved on the outer side of each guide rod;

[0011] A slanting groove guide block is installed in the limiting groove two in a limited sliding manner. A magnetic wall is arranged on one side of the slanting groove guide block facing the limiting groove two. The magnetic wall is magnetically connected with the magnetic attraction slider correspondingly. An inclined groove is opened at the other end of the slanting groove guide block. A limiting column is installed in the inclined groove in a limited sliding manner through a connecting block;

[0012] A limiting column is installed on one side of the connecting block and the other side is connected with the installation frame body. A plurality of rubber sealing blocks are installed inside the installation frame body. The installation frame body is installed in an arc-shaped groove opened on the inner wall of the aeration cylinder in a limited sliding manner. A plurality of air holes two are opened on the groove wall of the arc-shaped groove. The rubber sealing blocks block the air holes two in a natural state;

[0013] A plurality of guide rods are arranged on the upper part of the grille plate. The guide rods extend into a cylinder two arranged at the top of the aeration cylinder and are connected with an installation plate. A plurality of conical columns are arranged on the installation plate.

[0014] In addition, a preferred structure is that an air inlet pipe is communicated and arranged on one side of the bottom of the aeration cylinder. The air inlet pipe is communicated with an air supply pipe. Exhaust nozzles I are arranged on both sides of the middle of the air inlet pipe. The exhaust nozzles I are correspondingly installed in the air cavity I. A ventilation ring is arranged on the side far away from the exhaust nozzles I. The ventilation ring is installed on the inner wall of the bottom of the discharge cylinder. A plurality of exhaust nozzles II are arranged on the upper part of the ventilation ring. A feed pipe is arranged on the other side of the bottom of the aeration cylinder. One end of the feed pipe is communicated with a circulation pipe, and the other end is communicated with the inside of the discharge cylinder.

[0015] In addition, a preferred structure is that a plurality of guiding blocks are installed on the outer side of the installation frame body. The guiding blocks are in limiting sliding connection with the outer side wall of the arc-shaped groove.

[0016] In addition, a preferred structure is that the arc-shaped groove corresponds to an aeration wall opened on the outer wall of the aeration cylinder.

[0017] In addition, a preferred structure is that a plurality of conical columns are arranged on the upper part of the installation plate. A plurality of convex strips are arranged on the outer side of the conical columns. A rubber film is arranged above the conical columns. A plurality of air holes I are opened on the outer wall of the rubber film. The air holes I correspond to and coincide with the central positions of the conical columns. When the conical columns move upward, the conical columns are in extrusion contact with the air holes I.

[0018] The beneficial effects of the present invention are as follows:

[0019] In the present invention, the muddy water is subjected to aeration treatment in a multi-stage aeration tank. According to different sludge loads, the height of the grid plate inside the aeration cylinder in the aeration tank can be adaptively changed. The displacement of the grid plate is converted into the displacement amounts of the corresponding installation frame body and installation plate. When the sludge load is too large, the installation frame body and the installation plate drive their corresponding mechanisms to open the air holes I and air holes II, so as to generate 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

[0020] Figure 1 It 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;

[0021] Figure 2 It is a schematic diagram of the internal structure of the primary aeration tank proposed by the present invention;

[0022] Figure 3 It is a schematic diagram of the external structure of the aeration cylinder proposed by the present invention Figure 1 ;

[0023] Figure 4 It is a schematic diagram of the external structure of the aeration cylinder proposed by the present invention Figure 2 ;

[0024] Figure 5Cross-sectional view of the internal structure of the aeration cylinder proposed by the present invention;

[0025] Figure 6 Cross-sectional view of the internal structure of the ventilation column proposed by the present invention;

[0026] Figure 7 Cross-sectional view of the installation structure of the discharge cylinder proposed by the present invention;

[0027] Figure 8 Schematic diagram of the connection structure of the intake pipe proposed by the present invention;

[0028] Figure 9 Cross-sectional view of the internal structure of the discharge cylinder proposed by the present invention;

[0029] Figure 10 Schematic diagram of the installation structure of the chute guide block proposed by the present invention;

[0030] Figure 11 Enlarged view of the installation structure of the chute guide block proposed by the present invention;

[0031] Figure 12 Schematic diagram of the installation structure of the installation frame proposed by the present invention;

[0032] Figure 13 Schematic diagram of the connection structure between the chute guide block and the connection block proposed by the present invention;

[0033] Figure 14 Schematic diagram of the installation structure of the rubber seal block proposed by the present invention;

[0034] Figure 15 Cross-sectional view of the internal structure of the second air chamber proposed by the present invention;

[0035] Figure 16 Plan view of the internal structure of the second air chamber proposed by the present invention;

[0036] Figure 17 Schematic diagram of the installation structure of the conical column proposed by the present invention.

[0037] In the figure: 1. Grid tank; 2. Sedimentation tank; 3. Primary aeration tank; 4. Sedimentation circulation tank; 41. Circulation pipe; 5. Secondary aeration tank; 51. Aeration disk; 6. Subsurface flow wetland; 7. Effluent tank; 8. Air supply pipe; 9. Aeration cylinder; 10. Rubber membrane; 101. Air hole 1; 11. Installation base; 12. Inlet pipe; 121. Exhaust nozzle 1; 122. Ventilation ring; 123. Exhaust nozzle 2; 13. Feed pipe; 14. Discharge cylinder; 141. Discharge disk; 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. Return spring; 20. Pneumatic rotating blade; 21. Grid plate; 211. Magnetic attraction slider; 22. Guide rod; 23. Driving shaft; 24. Limit groove 1; 241. Limit groove 2; 25. Air chamber 1; 26. Air chamber 2; 27. Installation frame; 271. Rubber seal block; 272. Connecting block; 2721. Limit post; 28. Inclined groove guide block; 281. Magnetic wall; 29. Guide block; 30. Arc groove; 31. Installation plate; 32. Support spring; 33. Conical column; 331. Rib. Detailed implementation mode

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0040] Refer to Figure 1-2 , a multi-stage series modular domestic sewage treatment system, including a grid tank 1, a sedimentation tank 2, a primary aeration tank 3, a sedimentation circulation tank 4, a secondary aeration tank 5, a subsurface flow wetland 6, and an effluent tank 7. Among them, the grid tank 1, the sedimentation tank 2, the primary aeration tank 3, the sedimentation circulation tank 4, the secondary aeration tank 5, the subsurface flow wetland 6, and the effluent tank 7 are connected in series, and are circularly connected through a circulation pipe 41 between the primary aeration tank 3 and the sedimentation circulation tank 4.

[0041] Among them, the sewage enters through the grille tank 1, and the grille tank 1 prevents large suspended matters in the sewage, such as plastic bags, branches, papers, etc., from clogging or damaging the subsequent treatment equipment. At the same time, as the first process of the sewage treatment system, the grille tank 1 provides cleaner influent for the subsequent treatment process, which helps to reduce the burden of the subsequent treatment process. By removing the suspended matters, the grille tank can ensure the smooth operation of the entire sewage treatment system, thereby improving the treatment efficiency of the whole system.

[0042] Among them, multiple groups of aeration cylinders 9 are arranged in the primary aeration tank 3. A rubber membrane 10 is arranged at the upper part of the aeration cylinder 9 to discharge oxygen, and both sides of the bottom of the aeration cylinder 9 are respectively connected to the air supply pipe 8 and the circulation pipe 41. The inlet end of the air supply pipe 8 is connected to an external air pump, and the inlet end of the circulation pipe 41 is connected to the sedimentation circulation tank 4.

[0043] At this time, in the initial treatment stage of the primary aeration tank 3, most of the organic matters and suspended matters are still contained in the sewage. At this time, the activities of the organic matters and suspended matters 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 internal microorganisms.

[0044] In addition, multiple groups of aeration plates 51 are arranged at the bottom of the secondary aeration tank 5. 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. Among them, the sewage treated in the primary aeration tank 3 will enter the secondary aeration tank 5. At this time, the contents of organic matters, suspended matters and flocs have been greatly reduced. Therefore, the metabolic activities of the microorganisms are relatively weak, and their sludge load is reduced. At this time, further aeration treatment is carried out through the aeration plates 51 arranged inside. The sludge load in the secondary aeration tank 5 is relatively low, and oxygen bubbles can be generated by the aeration plates 51 to form a longer residence time to ensure the full degradation of pollutants.

[0045] Refer to Figure 3-6 , an installation base 11 is arranged at the bottom end of the aeration cylinder 9, and an air inlet pipe 12 and a feed pipe 13 are respectively arranged on both sides of the bottom end of the cylinder wall to connect the air supply pipe 8 and the circulation pipe 41. A discharge tray 141 is arranged at the upper part of the aeration cylinder 9. A discharge port 142 is arranged 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. A rubber membrane 10 is arranged on the upper part of the diaphragm seat 18. The rubber membrane 10 is spherical crown-shaped. During operation, the holes are evenly stressed, 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 through oxygen and squeeze to generate corresponding bubbles.

[0046] 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.

[0047] Furthermore, a discharge cylinder 14 is arranged inside the aeration cylinder 9, an air vent column 19 is arranged inside the discharge cylinder 14, a pneumatic rotary blade 20 is rotatably arranged inside the air vent column 19 through a drive shaft 23, the pneumatic rotary blade 20 rotates under the action of air flow to synchronously drive the drive shaft 23 to rotate, and synchronously drives an impeller 16 arranged in the middle of the mounting base 11 to rotate. During the rotation of the impeller 16, the water flow at the bottom of the pool is guided.

[0048] Wherein, a plurality of drainage openings 17 are formed on the outer side of the bottom end of the mounting base 11, and an impeller 16 is rotatably mounted 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 air vent column 19, and is rotatably mounted inside the air vent column 19 through a mounting frame. A pneumatic rotary blade 20 is fixedly mounted in the middle of the drive shaft 23.

[0049] Wherein, the top of the discharge cylinder 14 is connected to a discharge tray 141, a rubber membrane 10 is mounted on the top end of the discharge tray 141 through a diaphragm seat 18, and an air chamber two 26 is formed between the top wall of the discharge tray 141 and the rubber membrane 10. The bottom of the air chamber two 26 is communicated with the air vent column 19, and the air vent column 19 realizes the delivery of oxygen.

[0050] In addition, a grille plate 21 is slidably mounted outside the air vent column 19 in a limited manner, the grille plate 21 is mounted on the inner wall of the discharge cylinder 14 in a limited manner, and the notch gap of the grille 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 by the adhesion of the water flow and the flocs on the grille plate 21. At this time, the grille plate 21 is displaced under the action of the flocs, sludge, muddy water and water flow.

[0051] Furthermore, an air inlet pipe 12 is arranged on one side of the aeration cylinder 9. One end of the air inlet pipe 12 sequentially passes through the aeration cylinder 9 and the discharge cylinder 14 and is communicated with the inside of the air vent column 19. An air inlet 191 is arranged on one side of the bottom of the air vent column 19 to connect the air vent column 19. Under the pumping action of an external air pump, oxygen will be continuously fed into the air inlet pipe 12, and oxygen will be continuously introduced into the corresponding air chamber one 25 through the exhaust nozzle one 121 until the internal cavity is filled, and oxygen will continue to be fed into the exhaust nozzle two 123 connected to the air inlet pipe 12, and the exhaust nozzle two 123 will also discharge the corresponding oxygen gas, and at the same time supply air to the overall cavity of the inner wall of the aeration cylinder 9. Then oxygen will continue to be shunted and delivered to the air vent column 19. With the guiding design of the air vent column 19, the gas will be guided into the air chamber two 26 at the uppermost part of the aeration cylinder 9, and the gas in the air chamber two 26 will be gradually filled.

[0052] Among them, a feed pipe 13 is arranged on one side of the aeration cylinder 9. One end of the feed pipe 13 is communicated with the inside of the discharge cylinder 14. After the reaction in the primary aeration tank 3 is completed, the sewage enters the precipitation circulation tank 4 for precipitation treatment. At this time, the microorganisms and the flocs formed by the reaction of the mud and water precipitate to the bottom. Under the action of an external sludge pump and the circulation pipe 41, the sewage containing the mixed flocs at the bottom is circulated into the circulation pipe 41. The circulation pipe 41 is connected to the feed pipe 13, and the feed pipe 13 re-feeds the flocs containing microorganisms into the aeration cylinder 9. The aeration cylinder 9 continues to mix and stir the untreated sewage and the flocs containing microorganisms for transportation to improve the reaction efficiency.

[0053] Refer to Figure 7 、 10 -11, a pair of sliding grooves 192 are opened on both sides of the upper part of the ventilation column 19. A grille plate 21 is installed in the sliding grooves 192 in a limited sliding manner. Magnetic attraction sliders 211 are fixedly installed at both outer ends of the grille plate 21. The magnetic attraction sliders 211 are installed in a limited sliding manner in a first limiting groove 24 opened on the inner wall of the discharge cylinder 14. Under the action of magnetic attraction, the magnetic attraction sliders 211 are separated by the first limiting groove 24 and synchronously drive the inclined groove guide block 28 with a magnetic wall 281 to move. And because the magnetic attraction surfaces of the magnetic attraction sliders 211 and the magnetic wall 281 correspond to each other and realize synchronous displacement through magnetic attraction, under the movement of the grille plate 21, the symmetrically arranged inclined groove guide blocks 28 move along with it.

[0054] 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. The return spring 193 is connected to the inner wall of the grille plate 21. And with the movement displacement of the grille plate 21, the return spring 193 deforms to a certain extent and generates a corresponding acting force. And when the grille plate 21 is pushed upward under the influence of a driving force, the return spring 193 stretches to generate a downward acting force; and as the water flow thrust decreases, the return spring 193 elastically resets and synchronously drives the grille plate 21 to move downward to tend to reset.

[0055] Among them, one side inner wall of the magnetic attraction slider 211 facing the first limiting groove 24 has magnetism, thereby realizing the function of magnetic attraction between the two.

[0056] Refer to Figure 8, on both sides of the middle of the intake pipe 12, there is an exhaust nozzle one 121. The exhaust nozzle one 121 is correspondingly installed in the air chamber one 25. And on the side far from the exhaust nozzle one 121, there is a ventilation ring 122. The ventilation ring 122 is installed on the bottom inner wall of the discharge cylinder 14. And on the upper part of the ventilation ring 122, there are multiple exhaust nozzles two 123 to discharge oxygen. And as the exhaust nozzle one 121 continuously sprays oxygen, the air chamber one 25 will be initially filled and generate a certain air pressure. And when the aeration wall 15 and its corresponding mechanism are triggered, the gas in the air chamber one 25 is ejected through multiple pores opened in the aeration wall 15 to form oxygen bubbles.

[0057] Refer to Figure 5 , 9 -14, on both sides of the inner wall of the discharge cylinder 14, there are limit grooves one 24. In the limit grooves one 24, a grille plate 21 is connected in a limit sliding manner through a magnetic attraction slider 211. On the other side separated from the limit grooves one 24, there is a limit groove two 241. The limit groove two 241 is correspondingly opened on the outer wall of the discharge cylinder 14. And in the limit groove two 241, an inclined groove guiding block 28 is installed in a limit sliding manner. And on the inner wall of the inclined groove guiding block 28, there is a magnetic wall 281. The magnetic wall 281 is magnetically adsorbed and connected with the magnetic attraction slider 211 correspondingly.

[0058] Among them, on the outer side of the inclined groove guiding block 28, there is an inclined groove. In the inclined groove, a limit post 2721 is installed in a limit sliding manner. The other end of the limit post 2721 is fixedly installed on a connecting block 272. One end of the connecting block 272 is connected with an installation frame body 27. The installation frame body 27 is installed in an arc-shaped groove 30 opened inside the aeration cylinder 9 in a limit sliding manner. Among them, the arc-shaped groove 30 corresponds to the aeration wall 15. And on the groove wall, there are multiple pores two 151. And on the side far from the pores two 151, there is a rubber sealing block 271. The rubber sealing block 271 is installed in the installation frame body 27 in a limit manner.

[0059] Among them, under the guiding action of the inclined groove, the limit post 2721 installed in the inclined groove generates a displacement amount. At this time, the limit post 2721 displaces and synchronously drives the installation frame body 27 connected to it to deflect by a certain amplitude. And as the overall rotation of the installation frame body 27, the installation frame body 27 deflects in the arc-shaped groove 30. And due to the setting of the guiding block 29, the guiding block 29 limits the whole and ensures that the installation frame body 27 will not fall, shift, etc. during the deflection process. At the same time, on the aeration wall 15 correspondingly arranged on one side of the arc-shaped groove 30, there are corresponding pores opened. As the installation frame body 27 deflects, the corresponding pores gradually change from the original blocked state to the open state. At this time, the oxygen filled in the air chamber one 25 will be continuously sent into the pores and form oxygen bubbles by several micropores to supply oxygen to the muddy water.

[0060] Moreover, as the deformation amount of the installation frame 27 increases, the overall deflection angle of the installation frame 27 will continue to increase. There is a connection between the deflection angle and the length of the inclined groove of the inclined groove guide block 28. Therefore, under the guiding action of the inclined groove, when the limit post 2721 travels to the end of its inclined groove, the installation frame 27 is completely deflected, and all the air holes on the aeration wall 15 are opened. At this time, a large amount of oxygen in the first air cavity 25 will be sent into the pool in a large amount and in a full-effective manner to react with a large number of microorganisms in the muddy water.

[0061] Among them, 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 in a limited sliding manner on the outer side wall of the arc-shaped groove 30 to ensure the installation and sliding stability of the installation frame 27.

[0062] Furthermore, a plurality of guide rods 22 are arranged on the upper part of the grille plate 21. One end of the guide rod 22 extends upward, passes through the top wall of the discharge tray 141 and extends into the second air cavity 26. At the same time, the top end of each guide rod 22 is connected to the mounting plate 31. The mounting plate 31 is installed in a limited manner below the rubber membrane 10, and a plurality of support springs 32 are installed at the bottom of the mounting plate 31. The support springs 32 are correspondingly sleeved on the outer side of each guide rod 22.

[0063] Among them, a dynamic seal is provided at the connection between the guide rod 22 and the discharge tray 141 to ensure the sealing performance. The specific sealing principle of the dynamic seal is already an existing technology and is a conventional setting in the art.

[0064] Refer to Figure 15-17 , a plurality of conical columns 33 are arranged at equal intervals 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. A rubber membrane 10 is arranged above the conical columns 33. The outer side of the rubber membrane 10 is hermetically connected to the diaphragm seat 18. A plurality of air holes 101 are formed on the outer wall of the rubber membrane 10, and the air holes 101 coincide with the central position of the conical columns 33. When the conical columns 33 move upward, the conical columns 33 are in pressing contact with the air holes 101.

[0065] In this embodiment, untreated sewage is introduced through the grid tank 1, in which corresponding grid meshes and filter meshes are arranged to intercept and remove large-particle suspended solids in the sewage. Then the sewage enters the sedimentation tank 2 for sedimentation to remove some suspended solids. Then the upper liquid phase enters the first-stage aeration tank 3 for aeration treatment. In the first-stage aeration tank 3, since most of the organic matter and suspended solids in the sewage need to be removed, the metabolic activities of microorganisms are relatively vigorous. Therefore, a relatively large amount of oxygen is usually required to support this process. Specifically, both the degradation of organic matter and the removal of suspended solids require sufficient oxygen to maintain the respiratory metabolism of microorganisms. In the first-stage aeration tank 3, a plurality of groups of aeration cylinders 9 are arranged to adaptively inject sufficient large bubbles and high-density oxygen into the sewage and make adjustments according to the real-time sludge load, so as to ensure that microorganisms can fully utilize organic matter for growth and reproduction, and at the same time remove the organic matter and suspended solids in the sewage.

[0066] After the reaction in the first-stage aeration tank 3 is completed, the sewage enters the sedimentation circulation tank 4 for sedimentation treatment, and the microorganisms and the flocs of the mud-water reaction precipitate to the bottom, and are cyclically 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 second-stage aeration tank 5. Since the sewage has been treated in the first-stage aeration tank 3, the contents of organic matter and suspended solids have been greatly reduced. Therefore, the metabolic activities of microorganisms are relatively weak and their sludge load is reduced. At this time, further aeration treatment is carried out through the aeration disc 51 arranged inside.

[0067] Then, the treated sewage is filtered through the subsurface flow wetland 6 and finally discharged from the outlet tank 7 to complete the multi-stage series sewage treatment and purification process.

[0068] Among them, in the actual treatment of the primary aeration tank 3, multiple groups of aeration cylinders 9 are arranged in the primary aeration tank 3. The inside of the aeration cylinder 9 is connected to the air supply pipe 8 to introduce oxygen. When sewage enters the tank, the air supply pipe 8 pumps oxygen gas by an external air pump. Under the action of the high-speed gas push, the air supply pipe 8 pumps oxygen into the ventilation column 19. A pneumatic rotating blade 20 is arranged in the ventilation column 19. The pneumatic rotating blade 20 rotates at high speed under the action of the air flow. During the rotation process, the impeller 16 arranged in the middle of the mounting base 11 is synchronously driven by the drive shaft 23. As the impeller 16 rotates, some large flocs deposited at the bottom are guided by the water flow, enter the inside of the mounting base 11 and enter the discharge cylinder 14 through the drainage port 17. A discharge tray 141 is arranged at the top of the discharge cylinder 14 to form a channel for circulating sludge. When the muddy water enters the discharge cylinder 14, the sludge contacts the grid plate 21 arranged inside it and passes through the grid plate 21. Finally, the sludge is discharged through the discharge port 142 arranged outside the discharge tray 141. As oxygen is continuously supplied, the oxygen in the intake pipe 12 is discharged into the top air chamber two 26. The gas in the air chamber two 26 fills and accumulates to generate gas pressure, and squeezes the external rubber membrane 10 to deform it. The rubber membrane 10 is spherical crown-shaped. During operation, the holes are evenly stressed, 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 under the influence of air pressure will discharge oxygen bubbles, and multiple exhaust nozzles two 123 arranged inside the discharge cylinder 14 synchronously discharge oxygen, react with the muddy water entering the discharge cylinder 14, and are synchronously discharged from the discharge port 142. After the reaction in the primary aeration tank 3 is completed, the sewage will be discharged into the precipitation circulation tank 4 for precipitation treatment. At this time, the flocs generated by the reaction of the treated microorganisms and sewage precipitate to the bottom of the tank. Under the pumping action of the external sludge pump, the flocs generated by the reaction of the microorganisms and sewage are transported into the circulation pipe 41, and continue to be sent through the circulation pipe 41 to be connected to the feed pipe 13. Since the feed pipe 13 is connected to multiple aeration cylinders 9 in the primary aeration tank 3, at this time, the flocs containing microorganisms are sent back into the aeration cylinder 9 again. The aeration cylinder 9 continues to mix and stir the untreated sewage and the flocs containing microorganisms for transportation to improve the reaction efficiency.

[0069] Among them, due to the rotation of the impeller 16, its blades will exert a force on the muddy water near the bottom of the tank, making it obtain kinetic energy. And the fluid is accelerated under the action of the blades and is thrown out along the tangent direction of the blades to form a centrifugal force. This centrifugal force makes the fluid (including sewage and the flocs in it, etc.) move with the impeller 16. According to the blade angle design of the impeller 16, the diversion of sewage is realized. And in cooperation with the tubular design of the aeration cylinder 9, this makes the muddy water at the bottom continuously transported upward and move synchronously with the flocs containing microorganisms entering cyclically.

[0070] Among them, with the increase of the aeration volume, the dissolved oxygen content in the wastewater increases, and the activity of microorganisms also enhances, thus accelerating the decomposition and transformation of organic matters and improving the removal rate of COD.

[0071] Among them, during actual use, the grille plate 21 intercepts some flocs and sludge in the muddy water and generates a certain driving force on the grille plate 21. At this time, the grille plate 21 moves upward under the action of the flocs, sludge, muddy water and water flow. Synchronously, the magnetic adsorption sliders 211 arranged on both sides of the grille plate 21 slide in the first limiting groove 24 on the inner wall of the discharge cylinder 14. And under the magnetic adsorption action, the magnetic adsorption sliders 211 are separated by the first limiting groove 24 and synchronously drive the inclined groove guide block 28 with a magnetic wall 281 to move. An inclined groove is arranged on the outer side of the inclined groove guide block 28. Under the guiding action of the inclined groove, the limiting column 2721 installed in the inclined groove displaces. At this time, the limiting column 2721 synchronously drives the installation frame body 27 to deflect by a certain amplitude.

[0072] Among them, the reset spring 193 is connected to the inner wall of the grille plate 21. And with the movement displacement of the grille plate 21, the reset spring 193 deforms to a certain extent and generates a corresponding acting force. And when the grille plate 21 moves upward under the influence of the driving force, the reset spring 193 stretches to generate a downward acting force. And as the water flow thrust decreases, the reset spring 193 elastically resets and synchronously drives the grille plate 21 to move downward to tend to reset.

[0073] Among them, when the sludge load in the primary aeration tank 3 is large, the content of sludge and flocs in the muddy water is large, and the number of flocs intercepted by the grille plate 21 increases. The cross-sectional area of the acting force on it increases. The flocs that are not dispersed in time will gradually adhere to the grille plate 21 in large quantities. And under the continuous pushing action of the water flow, the upward travel of the grille plate 21 correspondingly increases.

[0074] Correspondingly, the upward travel of the multiple groups of inclined groove guide blocks 28 arranged on the outer side of the discharge cylinder 14 correspondingly increases. And under the guiding action of the inclined groove, the deflection amplitude of the installation frame body 27 increases. And with the deflection of the installation frame body 27, the multiple rubber sealing blocks 271 arranged in the middle of it move and gradually separate from the second air holes 151 arranged on the aeration wall 15. At this time, the second air holes 151 are connected to the first air cavity 25. And with the oxygen input by the first exhaust nozzle 121, the first air cavity 25 will be initially filled and generate a certain air pressure. When the aeration wall 15 and its corresponding mechanism are triggered successively, the gas in the first air cavity 25 is ejected through the multiple air holes arranged in the aeration wall 15 to form oxygen bubbles and the bubbles are discharged through the second air holes 151.

[0075] Meanwhile, as the grille plate 21 moves upward, the guide rod 22 moves upward and drives the mounting plate 31 arranged in the second air chamber 26 to move upward in linkage. A plurality of conical columns 33 are arranged on the mounting plate 31, and a plurality of conical protrusions 331 are arranged on the outer side of the conical columns 33. During the overall upward movement of the conical columns 33, the conical columns 33 will be inserted into the rubber membrane 10 arranged above them and the first air holes 101 correspondingly arranged on the rubber membrane 10, and the hole walls will be squeezed and expanded, so that the first air holes 101 are deformed and expanded due to the characteristics of the rubber material. As the middle part of the conical columns 33 is inserted, the expansion area gradually increases, and larger oxygen bubbles are produced to meet the microbial reaction.

[0076] Among them, during the actual use process, the support spring 32 plays a role in supporting and resetting to ensure the stability of the mounting plate 31 during the upward movement and its reset function after upward movement.

[0077] Among them, it is worth noting that the intake pipe 12 pumps and sends out oxygen through the ventilation ring 122 and the second exhaust nozzle 123, and the jet direction of the second exhaust nozzle 123 is upward. Therefore, the flocs attached to the grille plate 21 can be washed away to prevent them from attaching to the grille plate 21 and affecting the normal circulation and use.

[0078] In the present invention, the muddy water is subjected to aeration treatment in a multi-stage aeration tank. According to different sludge loads, the aeration cylinder 9 arranged in the aeration tank can adaptively change the height of the grille plate 21 inside it, and convert the displacement of the grille plate 21 into the corresponding displacement amounts of the mounting frame 27 and the mounting plate 31. When the sludge load is too large, the mounting frame 27 and the mounting plate 31 drive their corresponding mechanisms to open the first air holes 101 and the second air holes 151, so as to generate 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.

[0079] Among them, in the first-stage aeration tank 3, in order to remove the sewage introduced from the grille tank 1, most of the organic matter and suspended substances still exist in the sewage, and the metabolic activities of microorganisms are relatively vigorous. Therefore, the traditional aeration disk assembly cannot meet the operation and reaction of microorganisms at this time. Therefore, with the grille plate 21 arranged in the aeration cylinder 9, the sludge load can be effectively sensed, and the aeration wall 15 and the rubber membrane 10 can be activated through the corresponding linkage assembly, and then larger and denser oxygen amounts are generated to support this process, so as to ensure the degradation of organic matter and the removal of suspended substances.

[0080] Moreover, as the sludge content increases, the sludge load in the primary aeration tank 3 is relatively large. Due to the grid design of the grid plate 21, most of the flocs and sludge inside the aeration cylinder 9 are intercepted, and a certain driving force is generated on the grid plate 21. At this time, the flocs, sludge and the acting force of the muddy water in the pipe of the grid plate 21 are displaced upward, and the corresponding linkage components are activated to open the aeration wall 15 to pass oxygen.

[0081] After that, in the secondary aeration tank 5, since the sewage has been preliminarily treated by multiple groups of aeration cylinder 9 components arranged in the primary aeration tank 3, the contents of a large amount of organic matter and suspended substances in the sewage have been greatly reduced in the primary aeration tank 3. At this time, the sludge load in the secondary aeration tank 5 is already smaller than that in the primary aeration tank 3. Therefore, a large amount of intensive oxygen supply like that in the primary aeration tank 3 is not required. At this time, the metabolic activities of some microorganisms are relatively 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 the conversion of pollutants such as ammonia nitrogen by microorganisms. Therefore, by setting a conventional aeration disc 51, the microorganisms in the tank can operate normally. However, compared with the primary aeration tank 3, although the amount of oxygen required in the secondary aeration tank 5 is usually smaller, the air pump components still need to be controlled to avoid problems of too high or too low power, so that more oxygen can be absorbed and utilized by the water body while reducing energy consumption.

[0082] At the same time, when the sludge load is less than the triggering stroke of the grid plate 21, the corresponding second air hole 151 will not open, and the first air hole 101 will not expand, avoiding energy waste.

[0083] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A multi-stage series 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 flow wetland, and an effluent tank, characterized in that, The grille tank, sedimentation tank, primary aeration tank, sedimentation circulation tank, secondary aeration tank, subsurface flow wetland, and effluent tank are connected in series in sequence, and multiple groups 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; An installation base is arranged at the bottom of the aeration cylinder, and a rubber membrane is arranged at the top through a discharge tray. A discharge cylinder and an air vent column are sequentially arranged inside the aeration cylinder. An air cavity one is left between the discharge cylinder and the aeration cylinder. A grille plate is installed in the middle of the air vent column in a limited sliding manner. The outer side of the grille plate is connected to an inclined groove guide block through a magnetic attraction slider, and the inclined groove guide block is connected to the installation frame body; A plurality of drainage ports are opened at the bottom end of the installation base. The drainage ports are communicated with the discharge cylinder arranged inside the aeration cylinder. An impeller is installed at the middle of the bottom end of the installation base through a driving shaft. The top end of the driving shaft passes through the installation base and extends into the air vent column. A pneumatic rotating blade is installed in the middle of the driving shaft. The pneumatic rotating blade is arranged in the middle of the air vent column. The air vent column is installed inside the aeration cylinder. A discharge cylinder is arranged inside the aeration cylinder. An air cavity one is formed between the discharge cylinder and the aeration cylinder. A discharge tray is arranged at the top of the discharge cylinder. A plurality of discharge ports are opened on the outer side of the discharge tray. The discharge ports are communicated with the inside of the discharge cylinder. A rubber membrane is installed at the upper end of the discharge tray through a diaphragm seat. An air cavity two is formed between the rubber membrane and the discharge tray; A pair of sliding grooves are arranged on both sides of the upper part of the air vent column. A grille plate is installed in the sliding grooves in a limited sliding manner. A reset spring is vertically installed between the bottom of the sliding groove and the grille plate. Magnetic attraction sliders are installed at both ends of the outer side of the grille plate. The magnetic attraction sliders are installed in a limited sliding manner in a first limiting groove opened on the inner wall of the discharge cylinder. A second limiting groove corresponding to the first limiting groove is opened on the outer wall of the discharge cylinder. One side of the second limiting groove is connected to an installation frame body through an inclined groove guide block in a limited manner; A plurality of guide rods are arranged on the upper part of the grille plate. One end of each guide rod passes through the top wall of the discharge tray and extends into the air cavity two. The top end of each guide rod is connected to an installation plate. The installation plate is installed in the air cavity two in a limited manner. A plurality of support springs are installed between the bottom of the installation plate and the top wall of the discharge tray. The support springs are correspondingly sleeved on the outer sides of each guide rod; An inclined groove guide block is installed in the second limiting groove in a limited sliding manner. A magnetic wall is arranged on one side of the inclined groove guide block facing the second limiting groove. The magnetic wall is magnetically connected to the magnetic attraction slider correspondingly. An inclined groove is opened at the other end of the inclined groove guide block. A limiting column is installed in the inclined groove in a limited sliding manner through a connecting block; A limiting column is installed on one side of the connecting block, and the other side is connected to the installation frame body. A plurality of rubber sealing blocks are installed inside the installation frame body. The installation frame body is installed in an arc-shaped groove opened on the inner wall of the aeration cylinder in a limited sliding manner. A plurality of air holes two are opened on the groove wall of the arc-shaped groove. The rubber sealing blocks block the air holes two in the natural state; A plurality of guide rods are arranged on the upper part of the grille plate. The guide rods extend into a cylinder two arranged at the top of the aeration cylinder and are connected to an installation plate. A plurality of conical columns are arranged on the installation plate; The upper part of the mounting plate is provided with a plurality of conical columns. A plurality of convex strips are arranged on the outer side of the conical columns. A rubber film is arranged above the conical columns. A plurality of air holes I are formed in the outer wall of the rubber film. The air holes I correspond to and coincide with the central positions of the conical columns. When the conical columns move upward, the conical columns are in extrusion contact with the air holes I.

2. The multi-stage series modular domestic sewage treatment system according to claim 1, characterized in that One side of the bottom of the aeration cylinder is communicated with an air inlet pipe. The air inlet pipe is communicated with an air supply pipe. Exhaust nozzles I are arranged on both sides of the middle of the air inlet pipe. The exhaust nozzles I are correspondingly installed in the air cavity I. A ventilation ring is arranged on the side far away from the exhaust nozzles I. The ventilation ring is installed on the inner wall of the bottom of the discharge cylinder. A plurality of exhaust nozzles II are arranged above the ventilation ring. A feed pipe is arranged on the other side of the bottom of the aeration cylinder. One end of the feed pipe is communicated with the circulation pipe, and the other end is communicated with the inside of the discharge cylinder.

3. The multi-stage series modular domestic sewage treatment system according to claim 1, characterized in that, A plurality of guiding blocks are installed on the outer side of the mounting frame body. The guiding blocks are in limiting sliding connection with the outer side wall of the arc-shaped groove.

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

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