A sewage filtration system

Abstract

The utility model relates to sewage treatment technical field provides a sewage filtering system, include: casing, first filter layer and first water collecting tank, first filter layer includes: first drive mechanism, set up on the casing, first driving wheel and a plurality of first driven wheels all are rotatively connected with the casing, and first driving wheel is connected with first drive mechanism, first filter screen is for annular net belt, first driving wheel and a plurality of second driven wheels jointly support first filter screen, under the action of first drive mechanism, first filter screen rotates, first filter screen sets up inside first water collecting tank, first sweeper is contacted with first filter screen through first pre -tightening device, the utility model discloses set up first sweeper can gather the filter residue of first filter screen in time and remove in time, has simplified the cleaning process of first filter screen.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular provides a wastewater filtration system. Background Technology

[0002] Wastewater treatment plants are mostly designed with pretreatment systems to remove most of the suspended solids in wastewater, thereby reducing the load and energy consumption of subsequent biochemical processes.

[0003] In existing technologies, most wastewater pretreatment uses fine screens or rotary drum filters, followed by cyclone grit chambers. However, the filtration structures in these wastewater treatment systems require regular cleaning after long-term use. In most cases, the filter screens need to be removed, cleaned, and then reinstalled, which is a cumbersome cleaning process. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a wastewater filtration system to solve the problem of cumbersome disassembly and assembly of filter screens in existing wastewater treatment systems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a wastewater filtration system, comprising: a shell, a first filter layer, and a first water collection tank; the first filter layer comprises: A first drive mechanism is disposed on the housing; The first driving wheel and multiple first driven wheels are rotatably connected to the housing, and the first driving wheel is connected to the first driving mechanism; The first filter screen is a ring-shaped mesh belt. The first driving wheel and multiple first driven wheels jointly support the first filter screen. Under the action of the first driving mechanism, the first filter screen rotates. The first filter screen is disposed inside the first water collection tank. The first cleaner comes into contact with the first filter screen via a first pre-tightening device.

[0006] According to the present invention, a wastewater filtration system is provided, wherein the pore size of the first filter screen is 250 micrometers; the first filter layer further includes a first roller, which is rotatably connected to the housing, and the first roller is used to assist in supporting the first filter screen.

[0007] According to the present invention, a wastewater filtration system further includes a second filter layer and a second water collection tank. The second filter layer is disposed at the bottom of the first filter layer, and the second water collection tank is connected to the first water collection tank through a connecting pipe.

[0008] According to the wastewater filtration system provided by this utility model, the first filter layer includes: The second drive mechanism is disposed within the housing; The second driving wheel and multiple second driven wheels are rotatably connected to the housing, and the second driving wheel is connected to the second drive mechanism; The second filter screen is an annular mesh belt. The second driving wheel and multiple second driven wheels jointly support the second filter screen. Under the action of the second driving mechanism, the second filter screen rotates. The second cleaner contacts the second filter screen via the second pre-tightening device.

[0009] According to the wastewater filtration system provided by this utility model, the pore size of the second filter screen is 48 micrometers; each of the second filter layers further includes a second roller, which is rotatably connected to the housing, and the second roller is used to assist in supporting the second filter screen.

[0010] According to the wastewater filtration system provided by this utility model, the first filter layer further includes a first tensioning device for tensioning the first filter screen; the second filter layer further includes a second tensioning device for tensioning the second filter screen.

[0011] According to the wastewater filtration system provided by this utility model, the first filter layer further includes a first correction device, which is used to correct the deviation of the first filter screen; the second filter layer further includes a second correction device, which is used to correct the deviation of the second filter screen.

[0012] According to the present invention, a sewage filtration system further includes a water distributor and a baffle plate. The top of the baffle plate is connected to the housing, and a flexible plate is provided at the bottom. The flexible plate is attached to the filter screen, and the baffle plate forms an upward-opening sewage trough.

[0013] According to the wastewater filtration system provided by this utility model, the baffle plate is inclined and the water distributor is closer to the lower end.

[0014] According to the present invention, a wastewater filtration system further includes a backwasher disposed inside the first filter screen and the second filter screen; the backwasher includes a spray pipe, a collection box and a plurality of nozzles; the spray pipe is connected to a water source; the nozzles are disposed inside the first filter screen and backwash from the inside to the outside.

[0015] As can be seen from the above technical solution, compared with the prior art, this utility model has the following beneficial effects: This utility model provides a wastewater filtration system, which has the following beneficial effects: (1) By setting the first cleaner, the first pre-tightening device contacts the first filter screen, which can remove the filter residue accumulated on the first filter screen in time, and the removed filter residue falls into the slag hopper.

[0016] (2) By setting up the first filter screen and the second filter screen, the pore size of the first filter screen is 250 micrometers and the pore size of the second filter screen is 48 micrometers. This can efficiently remove suspended impurities in the sewage, reduce the load and energy consumption of the subsequent biochemical stage, and significantly reduce investment and operating costs. It also saves project land and improves the level of automation and operational reliability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 A schematic diagram of the wastewater filtration system provided by this utility model; Figure 2 A side view of the wastewater filtration system provided by this utility model; In the figure: 1. Shell; 2. First filter layer; 3. First water collection tank; 4. Second filter layer; 5. Second water collection tank; 6. Connecting pipe; 21. First drive mechanism; 22. First driving wheel; 23. First driven wheel; 24. First filter screen; 25. First cleaner; 26. First idler roller; 27. First tensioning device; 28. First correction device; 41. Second drive mechanism; 42. Second driving wheel; 43. Second driven wheel; 44. Second filter screen; 45. Second cleaner; 46. Second idler roller; 47. Second tensioning device; 48. Second correction device; 7. Water distributor; 8. Water baffle; 9. Backwasher; 10. Slag hopper. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1 and Figure 2As shown, this utility model provides a sewage filtration system, including a housing 1, a first filter layer 2, and a first water collection tank 3; the first filter layer 2 includes a first drive mechanism 21, a first drive wheel, multiple first driven wheels 23, a first filter screen 24, and a first cleaner 25. The first drive mechanism 21 is disposed on the housing 1; the first drive wheel 22 and multiple first driven wheels 23 are rotatably connected to the housing 1, and the first drive wheel 22 is connected to the first drive mechanism 21; the first filter screen 24 is an annular mesh belt, and the first drive wheel 22 and multiple first driven wheels 23 jointly support the first filter screen 24. Under the action of the first drive mechanism 21, the first filter screen 24 rotates; the first filter screen 24 is disposed inside the first water collection tank 3; the first cleaner 25 contacts the first filter screen 24 through a first pre-tightening device.

[0021] The wastewater filtration system provided by this utility model is applied to the pretreatment system of a wastewater treatment plant. Wastewater from the wastewater treatment plant's inlet channel enters the system of this utility model through a φ800mm pipe. After passing through the first filter layer 2, larger particle size impurities are filtered out, and the wastewater enters the first collection tank 3. During the filtration of wastewater in the first filter layer 2, the first cleaner 25 is tightly attached to the first filter screen 24 through the first pre-tightening device, and the filter residue accumulated on the first filter screen 24 is removed in a timely manner. The removed filter residue falls into the slag hopper 10.

[0022] It should be noted that the slag hopper 10 needs to be placed at the bottom of the first cleaner 25.

[0023] In one feasible embodiment of the present invention, the pore size of the first filter screen 24 is 250 micrometers; the first filter layer 2 further includes a first roller 26, which is rotatably connected to the housing 1, and the first roller 26 is used to assist in supporting the first filter screen 24.

[0024] In one feasible embodiment of the present invention, a second filter layer 4 and a second water collection tank 5 are also included. The second filter layer 4 is disposed at the bottom of the first filter layer 2, and the second water collection tank 5 is connected to the first water collection tank 3 through a connecting pipe 6.

[0025] In the above embodiment, the sewage in the first collection tank 3 enters the second filter layer 4 through the connecting pipe 6, where fine particles of impurities are filtered out again, and then enters the second collection tank 5. The second collection tank 5 has a drain pipe on its side, through which the sewage enters the subsequent multi-stage biological treatment tank.

[0026] In one feasible embodiment of this utility model, the second filter layer 4 includes a second drive mechanism 41, a second drive wheel 42 and a plurality of second driven wheels 43, a second filter screen 44 and a second cleaner 45. The second drive mechanism 41 is disposed inside the housing 1. The second drive wheel 42 and the plurality of second driven wheels 43 are rotatably connected to the housing 1, and the second drive wheel 42 is connected to the second drive mechanism 41. The second filter screen 44 is an annular mesh belt. The second drive wheel 42 and the plurality of second driven wheels 43 jointly support the second filter screen 44. Under the action of the second drive mechanism 41, the second filter screen 44 rotates. The second cleaner 45 contacts the second filter screen 44 through a second pre-tightening device.

[0027] The second filter layer 4 performs secondary filtration of the wastewater after the first-stage filtration. Similarly, a slag hopper 10 also needs to be placed at the bottom of the second cleaner 45.

[0028] In one feasible embodiment of the present invention, the pore size of the second filter screen 44 is 48 micrometers; the second filter layer 4 also includes a second roller 46, which is rotatably connected to the housing 1, and the second roller 46 is used to assist in supporting the second filter screen 44.

[0029] Both the first filter screen 24 and the second filter screen 44 are made of high-molecular polyester fiber plain woven mesh belts. The filter screens are 2 meters wide and 13.5 meters long. The upper filter screen has a 60-mesh pore size, and the lower filter screen has a 250-mesh pore size. After two-stage filtration, the removal rate of particulate matter in wastewater with a particle size greater than 60 micrometers is over 97%.

[0030] In one feasible embodiment of this utility model, the first filter layer 2 further includes a first tensioning device 27 for tensioning the first filter screen 24; the second filter layer 4 further includes a second tensioning device 47 for tensioning the second filter screen 44. The first filter screen 24 and the second filter screen 44 are arranged at the rear of the housing 1 and are pushed by a cylinder piston. The first tensioning device 27 and the second tensioning device 47 move backward using tensioning wheels to maintain a certain tension on the first filter screen 24 and the second filter screen 44.

[0031] The first water collection tank 3 and the second water collection tank 5 can be made of 304 stainless steel. One side is connected to the shell 1 through a rigid cantilever beam, and the other side can be unconnected. When it is necessary to replace the first filter screen 24 and the second filter screen 44, simply loosen the first tensioning device 27 and the second tensioning device 47, and the first filter screen 24 or the second filter screen 44 can be quickly pulled out for replacement.

[0032] In one feasible embodiment of the present invention, the first filter layer 2 further includes a first correction device 28, which is used to correct the deviation of the first filter screen 24; the second filter layer 4 further includes a second correction device 48, which is used to correct the deviation of the second filter screen 44.

[0033] The first alignment device 28 can automatically adjust the first filter 24 to operate in the center position, and the second alignment device 48 can automatically adjust the second filter 44 to operate in the center position. Additionally, an offset alarm can be installed to alert personnel to keep the first filter 24 and the second filter 44 in the center position for as long as possible to ensure good filtration performance.

[0034] In one feasible embodiment of this utility model, it also includes a water distributor 7 and a baffle plate 8. The top of the baffle plate 8 is connected to the housing 1, and a flexible plate is provided at the bottom. The flexible plate is attached to the first filter screen 24, and the baffle plate 8 forms a sewage tank with the opening facing upward.

[0035] Among them, the water distributor 7 is a rectangular water distribution structure, which is connected to the φ800 water inlet main pipe at the top. It has multiple water distribution plates inside, and the baffle plate 8 is divided into three pieces, which are arranged on the left, right and rear sides of the filter screen to form an upward-opening sewage tank.

[0036] In one feasible embodiment of this utility model, the baffle plate 8 is inclined and the water distributor 7 is closer to the lower end.

[0037] In one feasible embodiment of this utility model, a backwasher 9 is further included, disposed inside the first filter screen 24 and the second filter screen 44. The backwasher 9 includes a spray pipe, a collection box, and several nozzles. The spray pipe is connected to a water source. The nozzles are disposed inside the first filter screen 24 and backwash from the inside out. The backwash water can come from the water after the second stage filtration, which generates additional water consumption. A booster water pump can be equipped to supply water to the backwash nozzles. The wastewater containing impurities after backwashing is discharged into the plant's wastewater system through the drain pipe at the bottom of the collection box.

[0038] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sewage filtration system characterized by, It includes a housing (1), a first filter layer (2), and a first water collection tank (3); the first filter layer (2) includes: The first drive mechanism (21) is disposed on the housing (1); The first driving wheel (22) and a plurality of first driven wheels (23) are rotatably connected to the housing (1), and the first driving wheel (22) is connected to the first driving mechanism (21); The first filter screen (24) is an annular mesh belt. The first driving wheel (22) and multiple first driven wheels (23) jointly support the first filter screen (24). Under the action of the first driving mechanism (21), the first filter screen (24) rotates. The first filter screen (24) is located inside the first water collection tank (3). The first cleaner (25) contacts the first filter (24) through the first pre-tightening device.

2. The sewage filtration system of claim 1, wherein, The first filter screen (24) has a pore size of 250 micrometers; the first filter layer (2) also includes a first roller (26), which is rotatably connected to the housing (1), and the first roller (26) is used to assist in supporting the first filter screen (24).

3. The sewage filtration system of claim 2, wherein, It also includes a second filter layer (4) and a second water collection tank (5). The second filter layer (4) is disposed at the bottom of the first filter layer (2), and the second water collection tank (5) is connected to the first water collection tank (3) through a connecting pipe (6).

4. The sewage filtration system of claim 3, wherein, The second filter layer (4) includes: The second drive mechanism (41) is disposed inside the housing (1); The second driving wheel (42) and a plurality of second driven wheels (43) are rotatably connected to the housing (1), and the second driving wheel (42) is connected to the second driving mechanism (41); The second filter screen (44) is an annular mesh belt. The second driving wheel (42) and multiple second driven wheels (43) jointly support the second filter screen (44). Under the action of the second driving mechanism (41), the second filter screen (44) rotates. The second cleaner (45) contacts the second filter (44) through the second pre-tightening device.

5. The sewage filtration system of claim 4, wherein, The second filter screen (44) has a pore size of 48 micrometers; each of the second filter layers (4) also includes a second roller (46), which is rotatably connected to the housing (1), and the second roller (46) is used to assist in supporting the second filter screen (44).

6. The sewage filtration system of claim 4, wherein, The first filter layer (2) further includes a first tensioning device (27) for tensioning the first filter screen (24); the second filter layer (4) further includes a second tensioning device (47) for tensioning the second filter screen (44).

7. The sewage filtration system of claim 4, wherein, The first filter layer (2) further includes a first correction device (28) for correcting the first filter screen (24); the second filter layer (4) further includes a second correction device (48) for correcting the second filter screen (44).

8. The sewage filtration system of claim 4, wherein, It also includes a water distributor (7) and a baffle plate (8). The top of the baffle plate (8) is connected to the housing (1), and a flexible plate is provided at the bottom. The flexible plate is attached to the first filter screen (24). The baffle plate (8) forms a sewage tank with the opening facing upward.

9. The wastewater filtration system according to claim 8, characterized in that, The baffle plate (8) is inclined, and the water distributor (7) is closer to the lower end.

10. The sewage filtration system of claim 4, wherein, It also includes a backwasher (9), which is located inside the first filter screen (24) and inside the second filter screen (44); the backwasher (9) includes a spray pipe, a collection box and several nozzles; the spray pipe is connected to a water source; the nozzles are located inside the first filter screen (24) and backwash from the inside to the outside.

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