Urban reclaimed water treatment system using a biological aerated filter

Abstract

The application discloses a kind of urban reclaimed water treatment systems using biological aerated filter, it is related to water treatment technical field, including the biological aerated filter of successive series, ultrafiltration device, reverse osmosis device, primary desalting device, mixed ion exchanger and desalted water tank, wherein the biological aerated filter includes: pool body;First net board, it is detachably fixed in pool body;Multiple filter material components are sequentially stacked on the first net board, the filter material component can be taken out of pool body and cleaned outside the pool body;Aeration pipe is embedded into the pool body and located below the first net board;And sewage pipe is introduced into sewage to the bottom of the pool body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, and particularly relates to a municipal reclaimed water treatment system adopting an aerated biological filter. BACKGROUND

[0002] The main task of a boiler makeup water treatment system is to provide sufficient and qualified desalted water. In the southern region where water resources are abundant, it is the most ideal and economical to use underground water or surface water as the water source; however, in the northern region where water resources are scarce, the selection of the water source is a big problem. If the municipal reclaimed water is used as the water source, the natural water resource does not need to be relied on, and it is both environmentally friendly and economical.

[0003] However, the traditional municipal reclaimed water treatment technology generally adopts multi-stage sedimentation, filtration and oxidation methods, and the high energy consumption and use of chemical substances are not conducive to environmental protection. Therefore, a reclaimed water treatment technology which is efficient and environmentally friendly is needed.

[0004] In this case, the aerated biological filter appears in people's vision, and it becomes a technology suitable for municipal reclaimed water treatment. The aerated biological filter adopts a biological treatment method, that is, the attached growth and decomposition metabolism of microorganisms are utilized. The main principle is to introduce air into water to form a large number of bubbles on the water surface, and in this environment, the organic matter and nutrients such as nitrogen and phosphorus in the water will become the nutrients for the growth and metabolism of microorganisms, so as to realize the treatment of wastewater.

[0005] Compared with the traditional reclaimed water treatment technology, the aerated biological filter has the advantages of less investment, small land occupation, low operation cost, good treatment effect, environmental protection and safety, and one-time reaching of the national reclaimed water standard. Therefore, in the municipal reclaimed water treatment system, the aerated biological filter is used as a main treatment process, and it becomes a scientific and feasible choice.

[0006] Of course, the current aerated biological filter still has some defects, and one of the more important points is that the water consumption is large during backwashing, the water volume cannot be adjusted according to the actual situation, and due to the large amount of filter material to be treated during backwashing, the washing is not clean.

[0007] Therefore, it is necessary to provide a municipal reclaimed water treatment system adopting an aerated biological filter to solve the problems in the background technology. SUMMARY

[0008] To achieve the above object, the present application provides the following technical scheme: a municipal reclaimed water treatment system adopting an aerated biological filter, comprising an aerated biological filter, an ultrafiltration device, a reverse osmosis device, a primary desalination device, a mixed ion exchanger and a desalted water tank which are connected in series, wherein the aerated biological filter comprises:

[0009] a pool body;

[0010] a first net plate, which is detachably fixed in the pool body;

[0011] a plurality of filter material assemblies, which are sequentially stacked on the first net plate and can be taken out of the pool body and cleaned outside the pool body;

[0012] an aeration pipe, which is embedded in the pool body and located below the first net plate; and

[0013] a sewage pipe, which introduces sewage to the bottom of the pool body.

[0014] Further, as a preferred embodiment, a through groove is formed in each of the left and right side walls of the pool body, which is a first through groove and a second through groove, respectively, and the size and position of the through groove correspond to the filter material assembly closest to the first net plate, one side of the pool body is provided with a cleaning tank close to the first through groove, and a bearing seat is sealingly and slidably connected in the second through groove, and the sliding action of the bearing seat is driven by a telescopic cylinder.

[0015] Further, as a preferred embodiment, the filter material assembly comprises:

[0016] a filter frame, which is a frame structure and has a porous surface;

[0017] a rotating pipe, one end of which is closed, the inner side of the other end has internal threads, a plurality of spray holes are distributed on the rotating pipe, and the rotating pipe is rotatably arranged in the filter frame; and

[0018] a filter material, which is filled in the filter frame.

[0019] Further, as a preferred embodiment, a second net plate is fixedly embedded in the cleaning tank for bearing the filter material assembly from the pool body.

[0020] A cleaning spray pipe is arranged in the cleaning tank and located below the second net plate.

[0021] A water supply assembly is limitingly and slidably arranged on the second net plate for connecting the rotating pipe and supplying water to the rotating pipe.

[0022] Further, as a preferred embodiment, sealing plates are arranged on both sides of the filter frame.

[0023] Further, as a preferred embodiment, the water supply assembly comprises:

[0024] a moving seat, which is limitingly and slidably arranged on the second net plate;

[0025] a threaded pipe, which is a hollow pipe and is rotatably arranged in the moving seat, has external threads, and is used for connecting the rotating pipe;

[0026] a driven gear, which is coaxially sleeved on the outside of the threaded pipe.

[0027] A drive gear is engaged with the driven gear, and the driven gear is driven by a motor embedded in the moving seat.

[0028] Further, as preferred, the threaded pipe is also connected with a water pipe through a rotary joint, the water pipe is a high-strength flexible pipe, and the water pipe is communicated to a winding disc at an end away from the threaded pipe and is supplied with water by the winding disc.

[0029] Further, as preferred, a cover is rotatably connected to the opening of the cleaning tank, a conveying belt is arranged below the cover, and a push plate is fixed to the bottom of the conveying belt.

[0030] Further, as preferred, the number of the filter material assemblies is 3-5.

[0031] Further, as preferred, a partition plate is fixed in the pool body, the partition plate is located between the aeration pipe and the sewage pipe, and a plurality of filter heads are embedded in the partition plate.

[0032] Compared with the prior art, the present application provides a municipal reclaimed water treatment system adopting an aerated biological filter, and has the following beneficial effects:

[0033] In the embodiment of the present application, the traditional filter material part is divided into a plurality of filter material assemblies, and when cleaning the filter material assemblies, only one filter material assembly can be taken out, so that:

[0034] 1. The cleaning is more thorough, and the water consumption is smaller;

[0035] 2. When cleaning one filter material assembly externally, the other filter material assemblies can continue to work;

[0036] 3. Compared with the traditional method of taking out all filter materials at the same time, in the present device, one filter material assembly can be taken out without a large driving force;

[0037] 4. The filter material assemblies are convenient to replace gradually;

[0038] In the embodiment of the present application, the replacement process of the filter material assemblies is highly automated, and almost no manual intervention is needed. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 Fig. 1 is a structural schematic view of an aerated biological filter in a municipal reclaimed water treatment system adopting an aerated biological filter;

[0040] Figure 2 Fig. 2 is a structural schematic view of a filter material assembly in the aerated biological filter;

[0041] Figure 3Structure diagram of a water supply assembly for a biological aerated filter;

[0042] Figure 4 Structure diagram of a city reclaimed water treatment system using a biological aerated filter;

[0043] In the figure: 1, pool body; 2, partition plate; 3, filter head; 4, aeration pipe; 5, sewage pipe; 6, first net plate; 7, bearing seat; 8, telescopic cylinder; 9, filter material assembly; 10, crown block; 11, hoist; 12, adsorption plate; 13, liquid discharge groove; 14, cleaning tank; 15, upper cover; 16, water pipe; 17, conveyor belt; 18, second net plate; 19, cleaning nozzle; 20, push plate; 91, filter frame; 92, column groove; 93, adsorption block; 94, rotating pipe; 95, filter material; 21, moving seat; 22, threaded pipe; 23, driven gear; 24, driving gear; 25, ultrafiltration device; 26, reverse osmosis device; 27, primary desalination device; 28, mixed ion exchanger; 29, desalination water tank. DETAILED DESCRIPTION

[0044] Please refer to Figures 1-4 In the embodiment of the present application, a city reclaimed water treatment system using a biological aerated filter is provided, which comprises a biological aerated filter, an ultrafiltration device 25, a reverse osmosis device 26, a primary desalination device 27, a mixed ion exchanger 28 and a desalination water tank 29 connected in series, wherein the biological aerated filter comprises:

[0045] a pool body 1;

[0046] a first net plate 6 which is detachably fixed in the pool body 1, and specifically, a bearing table can be fixed in the pool body, and the first net plate 6 is placed on the bearing table;

[0047] a plurality of filter material assemblies 9 which are stacked on the first net plate 6 in sequence, and the filter material assemblies 9 can be taken out of the pool body 1 and cleaned outside the pool body 1;

[0048] an aeration pipe 4 which is embedded into the pool body 1 and located below the first net plate 6; and

[0049] a sewage pipe 5 which introduces sewage into the bottom of the pool body 1.

[0050] In the embodiment, the first net plate 6 can well bear the filter material assemblies 9, so that the filter material assemblies 9 do not need to be fixedly connected with the pool body, and the filter material assemblies 9 can be taken out and cleaned subsequently;

[0051] In addition, in the embodiment, the traditional filter material part is actually divided into a plurality of filter material assemblies 9, so that only one filter material assembly 9 can be taken out when cleaning the filter material assemblies 9, and the following advantages are achieved:

[0052] 1. The cleaning is more thorough, and the water consumption is less;

[0053] 2. When one of the filter material assemblies 9 is cleaned externally, the others can continue to work;

[0054] 3. Compared with the traditional simultaneous removal of all filter materials, in this embodiment, one filter material assembly does not need to be removed with a large driving force;

[0055] 4. It is convenient to replace the filter material assemblies 9 step by step;

[0056] In addition, the filter material assembly 9 comprises:

[0057] a filter frame 91 which is a frame structure and has a porous surface;

[0058] a rotating pipe 94 which has a closed one end and an inner thread on the inner side of the other end, and is arranged in the filter frame 91 in a rotating manner, and has a plurality of spray holes distributed thereon; and

[0059] a filter material 95 which is filled in the filter frame 91.

[0060] The filter material can be a clay-fired spherical ceramsite filler which has a large specific surface area and can attach a large amount of biomass. Therefore, in this embodiment, the biological aerated filter removes most of the COD, BOD, phosphorus and ammonia nitrogen and the like by biological degradation, and the filter material in the filter also traps a large amount of SS. The water flow is in an upward flow, the depth of the filter material can be as high as 3-4 meters, and the treatment effect is very good, and the effluent water quality is stable.

[0061] In order to be able to perform the action of removing and cleaning all the filter material assemblies 9, in this embodiment, a through groove is formed on each of the left and right side walls of the pool body 1, which are a first through groove and a second through groove, the size and position of the through groove correspond to the filter material assembly 9 closest to the first net plate 6, a cleaning groove 14 is arranged on one side of the pool body 1 close to the first through groove, a bearing seat 7 is sealingly and slidably connected in the second through groove, and the sliding action of the bearing seat 7 is driven by the telescopic cylinder 8.

[0062] In order to better illustrate the working process, the filter material assemblies 9 will be named in detail: from bottom to top, they are the first filter material assembly, the second filter material assembly, the third filter material assembly, …, the n-th filter material assembly, and the n+1-th filter material assembly.

[0063] In the implementation, the first filter material assembly corresponding to the first through groove position is pulled out, at the same time, the telescopic cylinder 8 performs the elongation action, so that the bearing seat 7 can slide into the pool body 1, thereby carrying the second filter material assembly, the third filter material assembly, …, the n-th filter material assembly, and the n+1-th filter material assembly located above.

[0064] At the moment when the first filter assembly is pulled out of the pool body 1, the telescopic cylinder 8 synchronously performs a contraction action, so that the second filter assembly, the third filter assembly, …, the n-th filter assembly, and the n+1-th filter assembly can stably sink, and then the first filter assembly can be washed in the cleaning tank 14;

[0065] After the first filter assembly is washed, the first filter assembly can be placed above the n+1-th filter assembly at the uppermost position of the pool body 1;

[0066] In this way, the cleaning action is sequentially performed, the sequential cleaning of each filter assembly 9 can be realized, and since the sewage flows from bottom to top, the cleanliness of the first filter assembly, the second filter assembly, the third filter assembly, …, the n-th filter assembly, and the n+1-th filter assembly is sequentially increased, so that in the embodiment, the cleaning of each filter assembly 9 is to wash the dirtier filter assembly first, and the cleaner filter assembly 9 after cleaning is located at the uppermost position in the pool body 1, so as to ensure the cleanliness of the water quality at the water outlet.

[0067] As a preferred embodiment, the filter frame 91 is provided with sealing plates on both sides.

[0068] As a preferred embodiment, the number of filter assemblies 9 is 3-5.

[0069] As a preferred embodiment, a plurality of column grooves 92 are formed on the filter frame 91, and an adsorption block 93 is embedded below the column groove 92;

[0070] In addition, a transfer assembly is also arranged in the embodiment, which is used to transfer the filter assembly 9, wherein the transfer assembly comprises a crown block 10, the crown block 10 has a horizontal moving end, a winch 11 is fixed on the horizontal moving end, a free end of the winch is connected with an adsorption plate 12, and an electromagnetic adsorption column is fixed at the bottom of the adsorption plate 12, which corresponds to the column groove 92. The effect of adsorbing the filter assembly 9 is achieved by strong adsorption of the electromagnetic adsorption column to the adsorption block 93, so as to realize the transfer of the filter assembly 9 by cooperating with the winch 11 and the crown block 10.

[0071] In the embodiment, a second mesh plate 18 is fixedly embedded in the cleaning tank 14, which is used to carry the filter assembly 9 from the pool body 1;

[0072] The cleaning tank 14 is provided with a cleaning spray pipe 19, which is located below the second mesh plate 18;

[0073] A water supply assembly is limitingly and slidably arranged on the second mesh plate 18, which is used to connect the transfer pipe 94 and supply water for the transfer pipe 94.

[0074] The water supply assembly comprises:

[0075] a mobile base 21, which is slidingly arranged on the second mesh plate 18;

[0076] a threaded pipe 22, which is a hollow pipe and is rotatably arranged in the mobile base 21, the threaded pipe 22 having external threads for connecting with the rotating pipe 94;

[0077] a driven gear 23, which is coaxially arranged outside the threaded pipe 22; and

[0078] a driving gear 24, which is engaged with the driven gear 23, and the driven gear is driven by a motor, which is embedded in the mobile base 21.

[0079] In the implementation, the threaded pipe is driven to rotate by the motor, and the threaded pipe is horizontally moved by an external mechanism, so as to realize or release the threaded connection between the threaded pipe and the rotating pipe 94.

[0080] Specifically, the threaded pipe 22 is connected with a water pipe 16 by a rotary joint, the water pipe 16 is a high-strength flexible pipe, and an end of the water pipe 16 away from the threaded pipe 22 is connected to a winding disc and is supplied with water by the winding disc, and the winding disc can wind the water pipe 16.

[0081] Therefore, in the implementation, when the threaded pipe is connected with the rotating pipe 94, the threaded pipe and the rotating pipe 94 can be pulled out by rotating the winding disc, so as to pull out the first filter material assembly 9, and then the threaded pipe is driven to rotate by the motor, and the winding disc continues to rotate to continue to pull the mobile base 21, so as to gradually release the threaded connection between the threaded pipe and the rotating pipe 94.

[0082] In addition, an upper cover 15 is rotatably connected to an opening of the cleaning tank 14, a conveying belt 17 is arranged below the upper cover 15, and a push plate 20 is fixed to the bottom of the conveying belt 17.

[0083] Therefore, in the implementation, when the threaded pipe is not connected with the rotating pipe 94, the push plate 20 can be driven to move by rotating the conveying belt 17, so as to push the mobile base 21 to move to the right, when the threaded pipe contacts the rotating pipe, the threaded pipe is driven to rotate by the motor, and the conveying belt 17 continues to rotate to drive the push plate 20 to continue to move, so as to push the mobile base 21 to move to the right, thereby gradually realizing the threaded connection between the threaded pipe and the rotating pipe 94.

[0084] When the threaded pipe is connected with the rotating pipe 94, on the one hand, the rotating pipe 94 can be supplied with water by the water pipe 16, so as to realize the preliminary cleaning of the filter material assembly in the pool body 1, and on the other hand, the filter material assembly can be pulled out of the pool body 1 by the water pipe.

[0085] In the embodiment, the pool body 1 is fixed with a partition plate 2, the partition plate 2 is located between the aeration pipe 4 and the sewage pipe 5, and a plurality of filter heads 3 are embedded in the partition plate 2.

[0086] The filter head 3 is used for preliminarily intercepting large particles in the sewage pipe and discharging the sediments above the partition plate 2.

[0087] In addition, a liquid discharge groove 13 is arranged on one side of the top of the pool body 1, and is used for discharging the water body after water treatment.

[0088] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art in the technical range disclosed by the present application, according to the technical scheme and the invention concept of the present application, equivalent replacement or change, should be covered in the protection scope of the present application.

Claims

1. A municipal reclaimed water treatment system employing a biological aerated filter, characterized by: The application relates to a sewage treatment device, which comprises, in sequence, an aerated biological filter, an ultrafiltration device (25), a reverse osmosis device (26), a primary desalination device (27), a mixed ion exchanger (28) and a desalted water tank (29), wherein the aerated biological filter comprises: a pool body (1); a first net plate (6) which is detachably fixed in the pool body (1); a plurality of filter material assemblies (9) which are sequentially stacked on the first net plate (6) and can be taken out of the pool body (1) and cleaned outside the pool body (1); an aeration pipe (4) which is embedded in the pool body (1) and located below the first net plate (6); and a sewage pipe (5) which is connected to the bottom of the pool body (1) and supplies sewage to the pool body (1); a transfer assembly for transferring the filter material assemblies (9), the transfer assembly comprising a crown block (10) which has a horizontal moving end, a winch (11) fixed on the horizontal moving end, a suction plate (12) connected to the free end of the winch, and an electromagnetic suction column fixed on the bottom of the suction plate (12); tunnel grooves are formed in the left and right side walls of the pool body (1), and are respectively a first tunnel groove and a second tunnel groove, the size and position of the tunnel grooves correspond to the filter material assembly (9) closest to the first net plate (6), a cleaning tank (14) is arranged on one side of the pool body (1) and is close to the first tunnel groove, a bearing seat (7) is sealingly and slidably connected in the second tunnel groove, and the sliding action of the bearing seat (7) is driven by a telescopic cylinder (8); the filter material assembly (9) comprises: a filter frame (91) which is a frame structure and has a porous surface; a rotating pipe (94) which has a closed end and an inner thread on the inner side of the other end, a plurality of spray holes are distributed on the rotating pipe (94), and the rotating pipe (94) is rotationally arranged in the filter frame (91); and filter material (95) which is filled in the filter frame (91); a second net plate (18) is fixedly embedded in the cleaning tank (14) and is used for bearing the filter material assembly (9) from the pool body (1); a cleaning spray pipe (19) is arranged in the cleaning tank (14) and is located below the second net plate (18); a water supply assembly is limitingly and slidably arranged on the second net plate (18) and is used for connecting the rotating pipe (94) and supplying water to the rotating pipe (94); the water supply assembly comprises: a moving seat (21) which is limitingly and slidably arranged on the second net plate (18); a threaded pipe (22) which is a hollow pipe and is rotationally arranged in the moving seat (21), the threaded pipe (22) has an external thread and is used for connecting the rotating pipe (94); a driven gear (23) which is coaxially arranged on the outside of the threaded pipe (22); and a driving gear (24) which is engaged with the driven gear (23), the driven gear is driven by a motor, and the motor is embedded in the moving seat (21); the threaded pipe (22) is also connected with a water pipe (16) through a rotary joint, the water pipe (16) is a high-strength flexible pipe, one end of the water pipe (16) away from the threaded pipe (22) is connected to a winding disc and is supplied with water by the winding disc, and the winding disc can wind the water pipe (16).

2. The system for treating municipal recycled water using a biological aerated filter according to claim 1, wherein: sealing plates are arranged on both sides of the filter frame (91).

3. The system for treating municipal recycled water using a biological aerated filter according to claim 1, wherein: The opening of the cleaning tank (14) is rotatably connected with an upper cover (15), and the lower portion of the upper cover (15) is provided with a conveying belt (17), and the bottom of the conveying belt (17) is fixedly connected with a push plate (20).

4. The system for treating municipal recycled water using a biological aerated filter according to claim 1, wherein: The number of the filter assemblies (9) is 3-5.

5. The system for treating municipal recycled water using a biological aerated filter according to claim 1, wherein: The pool body (1) is fixedly connected with a partition plate (2), the partition plate (2) is located between the aeration pipe (4) and the sewage pipe (5), and a plurality of filter heads (3) are embedded in the partition plate (2).

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