Biological tank for A2O biological nitrogen and phosphorus removal process

Abstract

The utility model belongs to the field of biological tanks, in particular relates to a biological tank for an A2O biological nitrogen and phosphorus removal process, and aims to solve the problems that impurities need to be manually cleaned, the automatic cleaning effect cannot be achieved, the automation degree is relatively low, a shifting piece is in a fixed standing state, the matching degree with a stirring device is relatively low, and the mixing efficiency is relatively low in the prior art. According to the technical scheme, the sewage treatment device comprises a mounting frame, a sewage collection tank is fixedly mounted at the top of the mounting frame, a coarse mesh screen is arranged in the mounting frame and is obliquely placed, an anaerobic tank is fixedly mounted at the top of the mounting frame, a U-shaped frame is arranged in the anaerobic tank, shifting pieces are fixedly mounted on the inner walls of the two sides, close to each other, of the U-shaped frame, and the shifting pieces are fixedly mounted on the inner walls of the two sides of the U-shaped frame. According to the biological tank disclosed by the utility model, due to the synergistic effect of all the components, the biological tank can efficiently remove pollutants such as nitrogen, phosphorus and the like in sewage, so that the water quality is remarkably improved, and the comprehensive treatment effect has important significance on environmental protection and water resource recycling.

Description

TECHNICAL FIELD

[0001] The utility model relates to biological pool technical field especially relates to a A2O biological nitrogen and phosphorus removal process biological pool. BACKGROUND

[0002] The main harm of nitrogen and phosphorus pollution in water body can cause water body eutrophication, which not only reduces the ornamental value and tourism value of water body, leads to the stability reduction of aquatic organisms, reduces the aquatic organism species, destroys the ecological balance of water body, but also produces many toxic and harmful gases and other substances, harms the survival of human beings and organisms, and the water body of nitrogen and phosphorus needs to use A2O biological nitrogen and phosphorus removal process to handle water body.

[0003] Through the search, in the announcement number for CN117466467A, a kind of based on biological nitrogen and phosphorus removal process's sewage treatment device, there are some deficiencies in actual use process:

[0004] 1. The device can conveniently clean the impurities filtered by the obliquely installed coarse mesh screen, but the impurities still need to be cleaned manually, and the automatic cleaning effect cannot be achieved, so the degree of automation is relatively low.

[0005] 2. The anaerobic tank realizes anaerobic reaction by the cooperation of stirring device and paddle, but the paddle is in fixed stationary state, and the cooperation degree with stirring device is low, so the mixing efficiency is relatively low. UTILITY MODEL CONTENT

[0006] The utility model aims at solving the problems in the prior art that the impurities still need to be cleaned manually, the automatic cleaning effect cannot be achieved, the degree of automation is relatively low, the paddle is in fixed stationary state, the cooperation degree with stirring device is low, and the mixing efficiency is relatively low, and provides an A2O biological nitrogen and phosphorus removal process biological pool.

[0007] To achieve the above object, the utility model adopts the following technical scheme:

[0008] An A2O biological nitrogen and phosphorus removal process biological pool, comprising a mounting frame, a sewage collection tank is fixedly installed at the top of the mounting frame, a coarse mesh screen is arranged in the mounting frame and is inclined, an anaerobic tank is fixedly installed at the top of the mounting frame, a U-shaped frame is arranged in the anaerobic tank, a paddle is fixedly installed on the inner wall of the two sides of the U-shaped frame close to each other, a plurality of stirring blades are arranged in the anaerobic tank, and the paddle and the stirring blades are arranged in a staggered manner; further comprising a conveying assembly, the conveying assembly is located in the sewage collection tank, and the coarse mesh screen can be driven to rotate by the conveying assembly; further comprising a mixing assembly, the mixing assembly is located in the anaerobic tank, and the U-shaped frame and the plurality of stirring blades can be driven to rotate in opposite directions by the mixing assembly.

[0009] In a possible design, the conveying assembly includes two conveying rollers rotatably connected in the sewage collecting pool, and a coarse mesh screen is sleeved on the outer wall of the two conveying rollers, and the conveying rollers drive the coarse mesh screen to run, one end of one of the conveying rollers has a rotating shaft extending to the outside of the sewage collecting pool, a first gear is fixedly sleeved on the outer wall of the rotating shaft of one end of the conveying roller, a first driving motor is fixedly installed on one side of the sewage collecting pool, a second gear is fixedly sleeved on the output shaft of the first driving motor, and the first gear and the second gear are in meshing engagement.

[0010] In a possible design, the mixing assembly includes a rotating shaft rotatably connected in the anaerobic tank, and a plurality of stirring blades are fixedly sleeved on the outer wall of the rotating shaft, a second driving motor is fixedly installed on the top of the anaerobic tank, and the output shaft of the second driving motor is fixedly connected to the top of the rotating shaft, a rotating ring is rotatably connected in the anaerobic tank, and a U-shaped bracket is fixedly sleeved on the outer wall of the rotating ring, the rotating ring is rotatably sleeved on the outer wall of the rotating shaft, a third bevel gear is fixedly sleeved on the outer wall of the rotating shaft, a first bevel gear is fixedly sleeved on the outer wall of the rotating ring, and a second bevel gear is rotatably connected in the anaerobic tank, and the second bevel gear is in meshing engagement with the first bevel gear and the third bevel gear.

[0011] In a possible design, a collecting bin is fixedly installed on one side of the sewage collecting pool, and the sewage collecting pool and the collecting bin are in communication, one end of the coarse mesh screen is located above the collecting bin, and a fine mesh screen is fixedly installed in the sewage collecting pool and located below the coarse mesh screen.

[0012] In a possible design, a circulating pump is fixedly installed on one side of the anaerobic tank, and a connecting pipe is fixedly installed at the liquid inlet end and the liquid outlet end of the circulating pump, and the two ends of the connecting pipe are in communication with the top and the bottom of one side of the anaerobic tank.

[0013] In a possible design, an anoxic tank is fixedly installed in the mounting bracket, an aerobic tank is fixedly installed in the mounting bracket, a disinfection tank is fixedly installed in the mounting bracket, the sewage collecting pool, the anaerobic tank, the anoxic tank, the aerobic tank, and the disinfection tank are in communication through the connecting pipes, and an electromagnetic valve is fixedly installed in each of the connecting pipes.

[0014] In the application, sewage is introduced into the sewage collection tank through the water inlet, the first driving motor is started, the first driving motor drives the two conveying rollers connected with the coarse mesh screen to rotate through the meshing of the first gear and the second gear, so that the rotation of the coarse mesh screen is realized, and the incoming sewage is filtered, with the rotation of the coarse mesh screen, the filtered impurities fall into the collection bin, after the sewage is filtered through the coarse mesh screen, secondary filtration is carried out through the fine mesh screen, and is discharged into the anaerobic tank, the second driving motor is started, the rotating shaft is driven through the output shaft of the second driving motor, the third bevel gear is driven to rotate by the rotating shaft, the third bevel gear meshes with the second bevel gear, and the second bevel gear meshes with the first bevel gear, so that the reverse rotation of the rotating ring is realized, the U-shaped frame is driven to rotate by the rotating ring, and the plurality of stirring blades are driven to rotate by the rotating shaft, so that the reverse rotation of the U-shaped frame and the stirring blades is realized, the stirring efficiency is improved, and the sewage in the anaerobic tank is circulated and mixed through the use of the circulating pump and the circulating pipe, the sewage in the anaerobic tank is treated in the anoxic tank, the aerobic tank and the disinfection tank in sequence, and finally the effect of denitrification and phosphorus removal is realized.

[0015] Beneficial effects: in the utility model, the A2O biological denitrification and phosphorus removal process biological tank, through the design of the oblique placement filter assembly coarse mesh screen, in combination with the driving of the conveying assembly, the sewage entering the biological tank is preliminarily and effectively filtered, the large-particle impurities in the sewage are effectively removed, the impurities are subsequently collected in the specific area collection bin, subsequent cleaning and treatment are facilitated, and the smooth progress of the subsequent biological treatment step is ensured.

[0016] In the utility model, the design of the mixing assembly enables the U-shaped frame and the stirring blade to rotate reversely, greatly promotes the mixing of the sewage in the biological tank and the uniform distribution of the reactants, not only improves the efficiency of the biological reaction, but also ensures the sufficient contact between the microorganisms and the nutrients during the denitrification and phosphorus removal process, thereby optimizing the treatment effect.

[0017] In the utility model, the synergistic effect of each component, the biological tank can efficiently remove nitrogen, phosphorus and other pollutants in sewage, realize the significant improvement of water quality, and this comprehensive treatment effect has important significance for environmental protection and water resource recycling. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A three-dimensional structure schematic view of the A2O biological denitrification and phosphorus removal process biological tank is provided for the utility model;

[0019] Figure 2 A sectional structure schematic view of the sewage collection tank of the A2O biological denitrification and phosphorus removal process biological tank is provided for the utility model;

[0020] Figure 3The utility model provides a kind of A2O biological denitrification and phosphorus removal process biological pond anaerobic pond's sectional structure schematic diagram.

[0021] In the drawing: 1, mounting frame; 2, sewage collection tank; 3, collection bin; 4, coarse screen; 5, first drive motor; 6, anaerobic tank; 7, second drive motor; 8, anoxic tank; 9, aerobic tank; 10, disinfection tank; 11, conveying roller; 12, first gear; 13, second gear; 14, fine screen; 15, rotating ring; 16, rotating shaft; 17, stirring blade; 18, U-shaped frame; 19, first bevel gear; 20, second bevel gear; 21, third bevel gear. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Embodiment 1: refer to Figures 1 to 3 A kind of denitrification and phosphorus removal process biological pond, including mounting frame 1, the top of mounting frame 1 is fixedly installed with sewage collection tank 2, coarse screen 4 is equipped in mounting frame 1, and coarse screen 4 is inclined to place, the top of mounting frame 1 is fixedly installed with anaerobic tank 6, U-shaped frame 18 is equipped in anaerobic tank 6, the inner wall of the two sides of U-shaped frame 18 close to each other is fixedly installed with paddle, multiple stirring blades 17 are equipped in anaerobic tank 6, and paddle and stirring blade 17 are staggered to place;Still include conveying assembly, conveying assembly is located in sewage collection tank 2, and coarse screen 4 can be driven to rotate by conveying assembly;Still include mixing assembly, mixing assembly is located in anaerobic tank 6, and U-shaped frame 18 and multiple stirring blades 17 can be driven to reverse rotation by mixing assembly.In the top of mounting frame 1, fixedly installed with sewage collection tank 2, for collecting sewage to be handled, mounting frame 1 is equipped with an inclined coarse screen 4 inside, for filtering out the bulk impurities in sewage initially, the top of mounting frame 1 is also fixedly installed anaerobic tank 6, an U-shaped frame 18 is arranged in anaerobic tank 6, the inner wall of the two sides of U-shaped frame is fixedly installed with paddle, to assist the mixing of the substances in sewage, simultaneously, multiple stirring blades 17 are also equipped in anaerobic tank 6, paddle and stirring blade 17 are staggered to place, to ensure mixing effect, in addition, the biological pond also includes conveying assembly and mixing assembly, conveying assembly is located in sewage collection tank 2, and coarse screen 4 is driven to rotate, realizes the screening and conveying of impurities in sewage, and mixing assembly is located in anaerobic tank 6, and U-shaped frame 18 and stirring blade 17 are driven to reverse rotation, to further strengthen the mixing of the substances in sewage.

[0024] Refer to Figure 2The conveying assembly comprises two conveying rollers 11 rotatably connected in the sewage collecting pool 2, and the coarse mesh screen 4 is sleeved on the outer wall of the two conveying rollers 11, and the conveying roller 11 drives the coarse mesh screen 4 to operate, one end of one of the conveying rollers 11 extends to the outside of the sewage collecting pool 2 through a rotating shaft, a first gear 12 is fixedly sleeved on the outer wall of the rotating shaft of one end of the conveying roller 11, a first driving motor 5 is fixedly installed on one side of the sewage collecting pool 2, a second gear 13 is fixedly sleeved on the output shaft of the first driving motor 5, and the first gear 12 and the second gear 13 are engaged. A first driving motor 5 is fixedly installed on one side of the sewage collecting pool 2, and a second gear 13 engaged with the first gear 12 is fixedly sleeved on the output shaft of the first driving motor 5. When the first driving motor 5 is started, the first gear 12 and the second gear 13 are engaged, and through gear transmission, the conveying roller 11 and the coarse mesh screen 4 can be driven to rotate.

[0025] With reference to Figure 3 The mixing assembly comprises a rotating shaft 16 rotatably connected in the anaerobic tank 6, a plurality of stirring blades 17 are fixedly sleeved on the outer wall of the rotating shaft 16, a second driving motor 7 is fixedly installed on the top of the anaerobic tank 6, and one end of the output shaft of the second driving motor 7 is fixedly connected to the top of the rotating shaft 16, a rotating ring 15 is rotatably connected in the anaerobic tank 6, and a U-shaped frame 18 is fixedly sleeved on the outer wall of the rotating ring 15, the rotating ring 15 is rotatably sleeved on the outer wall of the rotating shaft 16, a third bevel gear 21 is fixedly sleeved on the outer wall of the rotating shaft 16, a first bevel gear 19 is fixedly sleeved on the outer wall of the rotating ring 15, and a second bevel gear 20 is rotatably connected in the anaerobic tank 6, and the second bevel gear 20 is engaged with the first bevel gear 19 and the third bevel gear 21 respectively. When the second driving motor 7 is started, the rotating shaft 16 and the stirring blades 17 can be driven to rotate, at the same time, the second bevel gear 20 is engaged with the first bevel gear 19 and the third bevel gear 21 respectively, so that the rotating ring 15 and the U-shaped frame 18 can be driven to rotate in the opposite direction of the rotating shaft 16.

[0026] With reference to Figure 2 A collecting bin 3 is fixedly installed on one side of the sewage collecting pool 2, and the sewage collecting pool 2 and the collecting bin 3 are communicated, one end of the coarse mesh screen 4 is located above the collecting bin 3, and a fine mesh screen 14 is fixedly installed in the sewage collecting pool 2 and located below the coarse mesh screen 4. The sewage collecting pool 2 and the collecting bin 3 are communicated, and one end of the coarse mesh screen 4 is located above the collecting bin 3, so as to collect the impurities screened out into the collecting bin 3, in addition, the fine mesh screen 14 is fixedly installed in the sewage collecting pool 2 and located below the coarse mesh screen 4, so as to further filter out smaller impurities.

[0027] With reference to Figure 3The side of the anaerobic tank 6 is fixedly provided with a circulating pump, the inlet end and the outlet end of the circulating pump are fixedly provided with connecting pipes, and the two ends of the connecting pipes are communicated with the top and the bottom of the side of the anaerobic tank 6. The circulating pump can realize the circulation of the sewage in the anaerobic tank 6, and further improve the treatment effect

[0028] The present application can be used in the A2O biological field, and can also be used in other fields applicable to the present application.

[0029] Embodiment 2: Reference Figure 1 On the basis of embodiment one, an A2O biological denitrification and phosphorus removal process biological tank is applied to the A2O biological field, the anoxic tank 8 is fixedly installed in the mounting frame 1, the aerobic tank 9 is fixedly installed in the mounting frame 1, the disinfection tank 10 is fixedly installed in the mounting frame 1, the sewage collection tank 2, the anaerobic tank 6, the anoxic tank 8, the aerobic tank 9 and the disinfection tank 10 are sequentially provided with connecting pipes for communication, and the plurality of connecting pipes are fixedly provided with electromagnetic valves. The sewage first enters the sewage collection tank 2 for preliminary filtration and screening, and then enters the anaerobic tank 6, the anoxic tank 8, the aerobic tank 9 and the disinfection tank 10 in sequence through the connecting pipes for treatment, and finally obtains purified water.

[0030] The present application file explains the principles of the anaerobic tank 6, the anoxic tank 8, the aerobic tank 9 and the disinfection tank 10:

[0031] The working principle of the anaerobic tank is to provide an anaerobic or anoxic environment for the sewage, so that anaerobic microorganisms can grow and reproduce. Under anaerobic conditions, organic matter in the sewage is decomposed by anaerobic microorganisms, producing ammonia nitrogen, carbon dioxide and hydrogen sulfide, etc. At the same time, phosphorus is released by phosphorus accumulating organisms in the anaerobic tank, and low-grade fatty acids and other easily degradable organic matter are absorbed. This process provides conditions for subsequent denitrification and phosphorus removal.

[0032] The working principle of the anoxic tank is to use denitrifying bacteria to convert nitrate brought in by internal reflux into nitrogen gas escaping into the atmosphere through biological denitrification under the condition of oxygen limitation, so as to achieve the purpose of denitrification. The dissolved oxygen range of the anoxic tank is usually controlled between 0.2~0.5mg / L. The dissolved oxygen level in this range helps to support the growth and metabolic activity of denitrifying bacteria. In the anoxic tank, phosphorus accumulating organisms neither absorb phosphorus nor release phosphorus, so the TP (total phosphorus) concentration remains stable.

[0033] The working principle of the aerobic tank is to oxidize ammonia nitrogen to nitrate under aerobic conditions by using the metabolic activities of nitrifying bacteria and aerobic microorganisms, while removing organic matter and phosphorus. In the aerobic tank, nitrifying bacteria convert ammonia nitrogen to nitrate, while polyphosphorus bacteria absorb excess phosphorus and remove phosphorus through the discharge of excess sludge. In addition, aerobic microorganisms also participate in the decomposition and removal of organic matter. The dissolved oxygen in the aerobic tank is usually controlled between 2-3 mg / L to ensure the normal growth and metabolic activity of microorganisms.

[0034] The working principle of the disinfection tank is to kill or remove pathogenic microorganisms in wastewater by physical or chemical methods to prevent harm to the environment and human health. The disinfection tank is usually located at the end of the biological denitrification and phosphorus removal process, and further disinfects the biologically treated wastewater. Common disinfection methods include ultraviolet disinfection, ozone disinfection and chlorine disinfection.

[0035] In summary, the anaerobic tank, anoxic tank, aerobic tank and disinfection tank in the biological denitrification and phosphorus removal process work together to complete the denitrification and phosphorus removal treatment of wastewater. By reasonably controlling the operating conditions of each tank and the metabolic activity of microorganisms, efficient wastewater treatment can be achieved.

[0036] However, as is well known to those skilled in the art, the working principle and wiring method of the first drive motor 5 and the second drive motor 7 are common, and both belong to conventional means or common general knowledge, which will not be described here. Those skilled in the art can make any selection or arrangement according to their needs or convenience.

[0037] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solutions and concepts of the present application within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An A2O biological denitrification and dephosphorization process biological tank, characterized in that, The utility model relates to a sewage treatment device, including: The top of mounting frame (1) is fixedly installed with sewage collection tank (2), the inside of mounting frame (1) is equipped with coarse mesh screen (4), and coarse mesh screen (4) is inclined to place, the top of mounting frame (1) is fixedly installed with anaerobic tank (6), the inside of anaerobic tank (6) is equipped with U type frame (18), the inside wall of the two sides of U type frame (18) that are close to each other is fixedly installed with paddle, the inside of anaerobic tank (6) is equipped with a plurality of stirring vane (17), and paddle and stirring vane (17) are staggered to place; It further includes a conveying assembly located in the sewage collection tank (2), which can drive the coarse mesh screen (4) to rotate; It further includes a mixing assembly located in the anaerobic tank (6), which can drive the U-shaped frame (18) and the plurality of stirring vanes (17) to rotate in opposite directions.

2. The A2O biological denitrification and dephosphorization process biological tank according to claim 1, characterized in that, The conveying assembly includes two conveying rollers (11) rotatably connected in the sewage collection tank (2), and the coarse mesh screen (4) is sleeved on the outer wall of the two conveying rollers (11), one end of one of the conveying rollers (11) extends to the outside of the sewage collection tank (2), a first gear (12) is fixedly sleeved on the outer wall of the rotating shaft at one end of one of the conveying rollers (11), a first drive motor (5) is fixedly installed on one side of the sewage collection tank (2), a second gear (13) is fixedly sleeved on the output shaft of the first drive motor (5), and the first gear (12) and the second gear (13) are engaged.

3. The A2O biological denitrification and dephosphorization process biological tank according to claim 1, characterized in that, The mixing assembly includes a rotating shaft (16) rotatably connected in the anaerobic tank (6), and the plurality of stirring vanes (17) are fixedly sleeved on the outer wall of the rotating shaft (16), a second drive motor (7) is fixedly installed on the top of the anaerobic tank (6), and one end of the output shaft of the second drive motor (7) is fixedly connected to the top of the rotating shaft (16), a rotating ring (15) is rotatably connected in the anaerobic tank (6), and the U-shaped frame (18) is fixedly sleeved on the outer wall of the rotating ring (15), the rotating ring (15) is rotatably sleeved on the outer wall of the rotating shaft (16), a third bevel gear (21) is fixedly sleeved on the outer wall of the rotating shaft (16), a first bevel gear (19) is fixedly sleeved on the outer wall of the rotating ring (15), a second bevel gear (20) is rotatably connected in the anaerobic tank (6), and the second bevel gear (20) is engaged with the first bevel gear (19) and the third bevel gear (21).

4. The A2O biological denitrification and dephosphorization process biological tank according to claim 1, characterized in that, A collection bin (3) is fixedly installed on one side of the sewage collection tank (2), and the sewage collection tank (2) and the collection bin (3) are connected, one end of the coarse mesh screen (4) is located above the collection bin (3), and a fine mesh screen (14) is fixedly installed in the sewage collection tank (2) and located below the coarse mesh screen (4).

5. The A2O biological denitrification and dephosphorization process biological tank according to claim 1, characterized in that, A circulating pump is fixedly installed on one side of the anaerobic tank (6), and connecting pipes are fixedly installed on the inlet and outlet of the circulating pump, and the two ends of the connecting pipes are connected to the top and bottom of one side of the anaerobic tank (6).

6. The A2O biological denitrification and dephosphorization process biological tank according to claim 1, characterized in that, The mounting frame (1) is fixedly installed with an anoxic tank (8), the mounting frame (1) is fixedly installed with an aerobic tank (9), the mounting frame (1) is fixedly installed with a disinfection tank (10), the sewage collecting tank (2), the anaerobic tank (6), the anoxic tank (8), the aerobic tank (9) and the disinfection tank (10) are sequentially installed with connecting pipes for communication, and a plurality of electromagnetic valves are fixedly installed in the connecting pipes.

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