High-efficiency sedimentation filter tank

Abstract

The utility model relates to a high-efficiency sedimentation filter tank. The sedimentation and filtration tank comprises a coagulation zone, a flocculation zone, a sedimentation and filtration zone and a water outlet channel, the coagulation zone, the flocculation zone and the precipitation filtering zone are sequentially arranged along the water flow direction; the precipitation filtering area comprises an inclined pipe, an air grid and a filtering plate; the air grid, the filter plate and the inclined pipe are sequentially arranged in the precipitation filter area from top to bottom, a granular fiber filter material layer is arranged between the air grid and the filter plate, and the specific gravity range of a granular fiber filter material is 1.2-1.4; the water outlet channel is arranged at the top end of the precipitation filtering area. According to the scheme provided by the invention, the particle fiber filter material layer with small specific gravity is arranged above the inclined pipe, so that the interception amount of suspended matters in water is increased, the filtering effect, the effluent quality and the hydraulic load are greatly improved, and the head loss is reduced; meanwhile, raw water can be adopted when backwashing water is carried out on the particle fiber filter material layer, and filtered water does not need to be adopted, so that the water production rate is improved, the occupied area is reduced, the construction cost is reduced, and energy is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technical field especially relates to a high -efficient sedimentation filter tank. BACKGROUND

[0002] In the sewage advanced treatment, the high -efficient sedimentation tank and the filter tank are often used to treat sewage, wherein, the high -efficient sedimentation tank is mainly used to remove suspended solid pollutants (SS) or the pollutants that can form solid particles after dosing, such as heavy metals, fluoride ions, silicon, silicon, phosphorus and suspended matters, the suspended solid pollutant concentration of its treated effluent is generally about 10-20 mg / L, for higher effluent quality requirement, such as the IV class standard in the surface water environmental quality standard (GB3838-2002), total phosphorus requirement is less than or equal to 0.3 mg / L, the effluent quality of high -efficient sedimentation tank is difficult to reach the requirement stably, needs further filtering through the filter tank, the filter tank refers to the raw water or wastewater through the filter medium to remove the suspended insoluble material in the solution, is often divided into two types of gravity type filter tank that flows from top to bottom and pressure type filter tank that flows from bottom to top, is often used in the water supply and wastewater treatment and water advanced treatment after sedimentation treatment.

[0003] But the existing filter tank not only has the problem of large floor area, and when backwashing the filter tank, good filtered water needs to be used, and a backwashing water tank (such as a clean water tank or a filtered water tank) and a backwashing water pump need to be constructed, which greatly reduces the water production rate, increases the engineering cost and energy consumption.

[0004] Therefore, it is urgent to design a high -efficient sedimentation filter tank, which can set the granular fiber filter material layer with small specific gravity above the inclined pipe, increase the interception amount of suspended matter in water, greatly improve the filtration effect, effluent quality and hydraulic load, reduce the water head loss, and use raw water in the tank when backwashing the granular fiber filter material layer, without using filtered water, improve the water production rate, and without setting a backwashing water tank and a supporting backwashing water pump, save the floor area, reduce the engineering cost and save energy. SUMMARY

[0005] To overcome the problems in the related art, the present application provides a high -efficient sedimentation filter tank, which can set the granular fiber filter material layer with small specific gravity above the inclined pipe, increase the interception amount of suspended matter in water, greatly improve the filtration effect, effluent quality and hydraulic load, reduce the water head loss, and use raw water in the tank when backwashing the granular fiber filter material layer, without using filtered water, improve the water production rate, and without setting a backwashing water tank and a supporting backwashing water pump, save the floor area, reduce the engineering cost and save energy.

[0006] The application provides a high-efficiency sedimentation filter tank, which comprises a coagulation zone, a flocculation zone, a sedimentation and filtration zone and a water outlet channel; the coagulation zone, the flocculation zone and the sedimentation and filtration zone are sequentially arranged along a water flow direction and are communicated with each other; the sedimentation and filtration zone comprises an inclined pipe, an air grid and a filter plate; the air grid, the filter plate and the inclined pipe are sequentially arranged in the sedimentation and filtration zone from top to bottom, and a granular fiber filter layer is arranged between the air grid and the filter plate; the specific gravity of the granular fiber filter ranges from 1.2 to 1.4; the water outlet channel is arranged at the top end of the sedimentation and filtration zone and is communicated with the sedimentation and filtration zone.

[0007] In the preferred technical scheme of the application, a two-way pipe, a water outlet pipe and a water outlet valve are further included; the two-way pipe is arranged on the water outlet channel and is communicated with the water outlet channel; the water outlet pipe is arranged on the two-way pipe and is communicated with the two-way pipe; and the water outlet valve is arranged on the water outlet pipe.

[0008] In the preferred technical scheme of the application, a backwashing air pipe, a backwashing wastewater pipe and a backwashing wastewater valve are further included; the backwashing air pipe is arranged at the top end of the sedimentation and filtration zone and is communicated with the sedimentation and filtration zone; the backwashing wastewater pipe is arranged on the two-way pipe and is communicated with the two-way pipe; and the backwashing wastewater valve is arranged on the backwashing wastewater pipe.

[0009] In the preferred technical scheme of the application, a sludge discharge pipe and a sewage backflow pipe are further included; a reverse-tapered sludge collecting hopper is arranged at the bottom center of the sedimentation and filtration zone; the sludge discharge pipe is arranged at the bottom end of the sludge collecting hopper; one end of the sewage backflow pipe is arranged above the sludge collecting hopper and is communicated with the sedimentation and filtration zone; and the other end is communicated with the flocculation zone.

[0010] In the preferred technical scheme of the application, the flocculation zone comprises a flow guide cylinder and a flocculation agitator; the flow guide cylinder is arranged in the flocculation zone; and the flocculation agitator is arranged in the flow guide cylinder.

[0011] In the preferred technical scheme of the application, the sedimentation and filtration zone further comprises a sludge scraper; the sludge scraper is arranged at the bottom end of the sedimentation and filtration zone and is used for scraping off the sludge concretion deposited at the bottom of the sedimentation and filtration zone.

[0012] In the preferred technical scheme of the application, the sedimentation and filtration zone further comprises an inclined pipe flushing air pipe; the inclined pipe flushing air pipe is arranged on the scraping arm of the sludge scraper, and the air outlet of the inclined pipe flushing air pipe faces the inclined pipe.

[0013] In the preferable technical scheme of the present application, the sedimentation and filtration zone further comprises a first chute and a second chute; the two first chutes are symmetrically arranged on the inner side wall of the sedimentation and filtration zone, and the two ends of the air grid are arranged in the first chutes; the two second chutes are arranged in parallel below the first chutes, and the two ends of the filter plate are arranged in the second chutes.

[0014] In the preferable technical scheme of the present application, an electric control cabinet is further included; the electric control cabinet is arranged on one side of the sedimentation and filtration zone and is electrically connected with the water outlet valve and the backwashing wastewater valve respectively.

[0015] The technical scheme provided by the present application has the following beneficial effects: the high-efficiency sedimentation and filtration tank provided by the present application comprises a coagulation zone, a flocculation zone, a sedimentation and filtration zone and a water outlet channel. By arranging a slanting pipe in the sedimentation and filtration zone and arranging a granular fiber filter material layer above the slanting pipe, the sedimentation tank and the filtration tank can be combined into one, thereby greatly reducing the floor area. By using the granular fiber filter material with small specific gravity, the granular fiber filter material layer has the characteristics of high void ratio, good hydrophilicity and high mechanical strength, the interception amount of suspended solids in water is increased, the filtration effect, the water quality and the hydraulic load are greatly improved, the SS of the outlet water can reach ≤5 mg / L, the total phosphorus can be ≤0.3 mg / L, the water quality requirement of the outlet water is met, the water head loss of the filtered water can be reduced to 1-1.5 m, the backwashing is easier, the original water in the tank can be used when backwashing, the filtered water is not needed, the water production rate is improved, a backwashing tank and a matching backwashing pump are not needed, the floor area is saved, the energy consumption and the engineering cost are greatly reduced. By arranging the filter plate, the granular fiber filter material layer can be supported and uniformly aerated and cleaned. By arranging the air grid on the upper and lower sides of the granular fiber filter material layer, the granular fiber filter material can be effectively prevented from being lost during backwashing, thereby ensuring the filtration effect.

[0016] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views.

[0018] Figure 1 FIG. 1 is a structural schematic diagram of a high-efficiency sedimentation and filtration tank according to an embodiment of the present application;

[0019] Figure 2 FIG. 3 is a structural schematic diagram of a flow guide cylinder and a flocculation agitator according to an embodiment of the present application;

[0020] Figure 3 is a structural schematic diagram of the air grid and filter plate cooperation shown by the embodiment of the present application;

[0021] Figure 4 is a structural schematic diagram of the water outlet pipe and water outlet valve cooperation shown by the embodiment of the present application.

[0022] Legend:

[0023] 1, coagulation zone; 2, flocculation zone; 21, flow guide cylinder; 22, flocculation agitator; 3, sedimentation and filtration zone; 31, inclined pipe; 32, air grid; 33, filter plate; 34, granular fiber filter material layer; 35, sludge collecting hopper; 36, sludge scraper; 37, inclined pipe flushing air pipe; 4, water outlet channel; 5, two-way pipe; 6, water outlet pipe; 7, water outlet valve; 8, backwashing air pipe; 9, backwashing wastewater pipe; 10, backwashing wastewater valve; 11, sludge discharge pipe; 12, sewage backflow pipe; 13, coagulation agitator. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present application will be described in more detail by referring to the attached drawings. Although the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present application is more thorough and complete, and the scope of the present application is fully conveyed to those skilled in the art.

[0025] The terms used in the present application are merely for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0026] It should be understood that although the terms "first", "second", "third", etc. can be used in the present application to describe various information, these information should not be limited by these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] At present, in order to improve the water quality, a filtering process is generally arranged after the high-efficiency sedimentation tank, but the existing filter tank not only has the problem of large floor area, but also needs to use good filtered water for backwashing the filter tank, and needs to be matched with a backwashing water tank (such as a clean water tank or a filtered water tank) and a backwashing water pump, which greatly reduces the water production rate, increases the engineering cost and energy consumption.

[0028] In view of the above problems, the embodiment of the present application provides a high-efficiency sedimentation and filtration tank, which can increase the interception amount of suspended solids in water by arranging a granular fiber filter material layer with small specific gravity above the inclined pipe, greatly improves the filtering effect, water quality and hydraulic load, and reduces the water head loss; at the same time, the original water in the tank can be used for backwashing the granular fiber filter material layer, without using filtered water, which improves the water production rate, and without separately arranging a backwashing water tank and a matched backwashing water pump, saves the floor area, reduces the engineering cost, and saves energy.

[0029] The technical solutions of the embodiments of the present application are described in detail below with reference to the drawings. Embodiment

[0030] Please refer to Figures 1-4 The high-efficiency sedimentation and filtration tank provided by the present application comprises a coagulation zone 1, a flocculation zone 2, a sedimentation and filtration zone 3 and a water outlet channel 4; the coagulation zone 1, the flocculation zone 2 and the sedimentation and filtration zone 3 are sequentially arranged along the water flow direction and are in communication with each other, and the water outlet channel 4 is arranged at the top end of the sedimentation and filtration zone 3 and is in communication with the sedimentation and filtration zone 3, so that the water in the coagulation zone 1 can flow to the flocculation zone 2, the water in the flocculation zone 2 can flow to the sedimentation and filtration zone 3, and the water filtered by the sedimentation and filtration zone 3 can flow out through the water outlet channel 4. The coagulation zone 1 is used for reacting the suspended solids and colloidal particles in sewage with a coagulant to form small flocs; the flocculation zone 2 is used for forming large flocs from the small flocs under the action of a flocculant; and the sedimentation and filtration zone 3 is used for sedimentation and filtration of the floc particles in sewage.

[0031] In order to make the suspended solids and colloidal particles in sewage fully contact with the coagulant or flocculant and combine to form larger flocs (such as small flocs and large flocs), facilitating subsequent sedimentation and filtration, the coagulation zone 1 comprises a first coagulation zone and a second coagulation zone, and the first coagulation zone and the second coagulation zone are sequentially arranged along the water flow direction and are in communication with each other. Further, in order to improve the mixing efficiency, a coagulation agitator 13 is arranged in each of the first coagulation zone and the second coagulation zone. The flocculation zone 2 comprises a flow guide cylinder 21 and a flocculation agitator 22, the flow guide cylinder 21 is arranged in the flocculation zone 2, and the flocculation agitator 22 is arranged in the flow guide cylinder 21. By arranging the flow guide cylinder 21, the water flow direction can be guided, and the stirring degree of the water flow in the flow guide cylinder 21 can be improved, and the mixing efficiency of the floc particles in sewage and the flocculant is improved.

[0032] The sedimentation and filtration area 3 comprises a sludge scraper 36 and a slanted tube 31. Specifically, the sludge scraper 36 is arranged at the bottom of the sedimentation and filtration area 3 for scraping the sludge crust deposited at the bottom of the sedimentation and filtration area 3, and the slanted tube 31 is arranged above the scraping arm of the sludge scraper 36 for enabling the flocculation particles in the water to slide along the slanted tube 31 to the bottom under the action of gravity, thereby achieving rapid sedimentation. The sedimentation and filtration area 3 further comprises a slanted tube flushing gas pipe 37; the slanted tube flushing gas pipe 37 is arranged on the scraping arm of the sludge scraper 36, so that the slanted tube flushing gas pipe 37 rotates 360 degrees under the rotation of the sludge scraper 36. The gas outlet of the slanted tube flushing gas pipe 37 faces the slanted tube 31, and timely flushing of the sludge on the slanted tube 31 in 360 degrees is achieved by arranging the slanted tube flushing gas pipe 37, thereby effectively avoiding the problem of poor sedimentation effect caused by the deposition of sludge on the slanted tube 31.

[0033] When the sewage in the flocculation area 2 flows to the sedimentation and filtration area 3, it contacts the slanted tube 31 and rapidly settles to the bottom of the sedimentation and filtration area 3 under the action of the slanted tube 31 to form a sludge crust, which is then scraped by the scraping arm of the sludge scraper 36. A reverse conical sludge collecting hopper 35 is arranged at the center of the bottom of the sedimentation and filtration tank, and the scraped sludge crust is gathered in the sludge collecting hopper 35. In order to facilitate the discharge of the sludge crust, the high-efficiency sedimentation and filtration tank further comprises a sludge discharge pipe 11 and a sewage backflow pipe 12. The sludge discharge pipe 11 is arranged at the bottom end of the sludge collecting hopper 35, so that the sludge in the sludge collecting hopper 35 is discharged through the sludge discharge pipe 11. One end of the sewage backflow pipe 12 is arranged above the sludge collecting hopper 35 and communicates with the sedimentation and filtration area 3, and the other end communicates with the flocculation area 2. After the sedimentation of the sewage through the slanted tube 31, the water with a relatively clear quality flows upwards and is located above the sedimentation and filtration tank, and the sewage with a relatively turbid quality and containing more flocculation particles sinks downwards and is located around the scraping arm of the sludge scraper 36 (i.e. the sewage is located below the sedimentation and filtration tank). At this time, the sewage located below the sedimentation and filtration tank is backflowed to the flocculation area 2 through the sewage backflow pipe 12, so as to improve the flocculation effect.

[0034] In order to further filter the water above the sedimentation and filtration tank, the sedimentation and filtration zone 3 further comprises an air grid 32 and a filter plate 33, which are sequentially arranged from top to bottom in the sedimentation and filtration zone 3 and above the mud scraper 36. The air grid 32 and the filter plate 33 are provided with a granular fiber filter layer 34 therebetween, wherein the specific gravity of the granular fiber filter ranges from 1.2 to 1.4; preferably, the thickness of the granular fiber filter layer 34 is 0.8-1.2m. By using granular fiber filter with small specific gravity, the granular fiber filter layer 34 has the characteristics of high porosity, good hydrophilicity and high mechanical strength. Compared with other common filter materials such as quartz sand and biological ceramic filter material, the granular fiber filter layer 34 of the present application can trap a larger amount of pollutants, reduce the head loss of filtered water to 1-1.5m, increase the filtration rate to 20-50m / h, and is easier to backwash and consumes less energy. By providing the filter plate 33, the granular fiber filter layer 34 can be supported and uniformly aerated and cleaned. By providing the air grid 32 above the granular fiber filter layer 34, the loss of granular fiber filter during backwashing can be effectively prevented, thereby ensuring the filtering effect. As shown in Figure 3 In order to further prevent the loss of granular fiber filter, an air grid 32 can also be provided below the filter plate 33.

[0035] In order to facilitate the disassembly and replacement of the air grid 32 and the filter plate 33, the sedimentation and filtration zone 3 further comprises a first sliding groove and a second sliding groove; two first sliding grooves are symmetrically arranged on the inner side wall of the sedimentation and filtration zone 3, and the two ends of the air grid 32 are arranged in the first sliding grooves; two second sliding grooves are arranged in parallel below the first sliding grooves, and the two ends of the filter plate 33 are arranged in the second sliding grooves. By providing the first sliding groove and the second sliding groove, the air grid 32 and the filter plate 33 can be quickly disassembled and replaced, which facilitates the replacement of the granular fiber filter.

[0036] Further, in order to prevent the problem that the filtering effect of the granular fiber filter layer 34 is poor due to too much sludge trapped, and at the same time, in order to facilitate the control of effluent and backwashing, the high-efficiency sedimentation filter tank further comprises a two-way pipe 5, an effluent pipe 6, an effluent valve 7, a backwashing gas pipe 8, a backwashing wastewater pipe 9 and a backwashing wastewater valve 10; the two-way pipe 5 is arranged on the effluent channel 4 and communicates with the effluent channel 4; the effluent pipe 6 and the backwashing wastewater pipe 9 are arranged on the two-way pipe 5 respectively and communicate with the two-way pipe 5; the effluent valve 7 is arranged on the effluent pipe 6, and the backwashing wastewater valve 10 is arranged on the backwashing wastewater pipe 9; the backwashing gas pipe 8 is arranged at the top end of the sedimentation and filtration zone 3 and communicates with the sedimentation and filtration zone 3. When the amount of sludge trapped by the granular fiber filter layer 34 reaches a preset value, the granular fiber filter layer 34 is uniformly aerated through the backwashing gas pipe 8, and at the same time, the backwashing wastewater valve 10 is opened, the effluent valve 7 is closed, and the granular fiber filter layer 34 is washed with water through the inclined pipe flushing gas pipe 37, and the wastewater after flushing is discharged through the backwashing wastewater pipe 9, so that the effect of flushing the granular fiber filter layer 34 is improved by using the gas-water combined mode; and the backwashing operation does not need to use the effluent after filtration, effectively improves the effluent rate, and reduces the occupied area. When the granular fiber filter layer 34 does not need to be backwashed, only the backwashing wastewater valve 10 needs to be closed and the effluent valve 7 needs to be opened, so that the water in the effluent channel 4 flows out of the effluent pipe 6.

[0037] In order to realize automatic opening and closing of the valve, the high-efficiency sedimentation filter tank further comprises an electric control cabinet; the electric control cabinet is arranged on one side of the sedimentation and filtration zone and is electrically connected with the effluent valve 7 and the backwashing wastewater valve 10 respectively. The opening and closing of the effluent valve 7 and the backwashing wastewater valve 10 are controlled through the electric control cabinet, which effectively saves labor and improves the degree of automation.

[0038] It should be noted that the high-efficiency sedimentation filter tank provided by the application can also be an integrated steel structure.

[0039] Working principle:

[0040] The sewage passes through the coagulation zone 1 and is destabilized with a coagulant to form small flocculation, and then flows to the flocculation zone 2, and is rapidly formed into large flocculation with a flocculant under the pushing of the flow guide cylinder 21 and the flocculation stirrer 22, and then the effluent enters the sedimentation filtration zone 3; the sludge in the water is rapidly settled through the inclined pipe 31 and forms a sludge crust at the bottom of the sedimentation filtration zone 3, and then the sludge crust is scraped off by the sludge scraper 36 and falls into the sludge hopper 35, and is discharged through the sludge discharge pipe 11, so that the sludge in the water is effectively reduced; at this time, the water above the sedimentation filtration zone 3 is further filtered through the granular fiber filter material layer 34, and the filtered clear water is discharged through the effluent channel 4 and the effluent pipe 6; when the amount of sludge intercepted by the granular fiber filter material layer 34 reaches a preset value, the backwashing wastewater valve 10 is opened and the effluent valve 7 is closed, and the granular fiber filter material layer 34 is uniformly aerated and flushed by starting the backwashing air pipe 8 and the inclined pipe flushing air pipe 37, and the flushed wastewater is discharged through the backwashing wastewater pipe 9, so that the filtering effect of the granular fiber filter material layer 34 is effectively ensured.

[0041] In the embodiment, the high-efficiency sedimentation filtration tank provided by the application includes a coagulation zone, a flocculation zone, a sedimentation filtration zone and an effluent channel. By arranging an inclined pipe in the sedimentation filtration zone and arranging a granular fiber filter material layer above the inclined pipe, the sedimentation tank and the filtration tank are combined into one, thereby greatly reducing the floor area. By using the granular fiber filter material with small specific gravity, the granular fiber filter material layer has the characteristics of high void ratio, good hydrophilicity and high mechanical strength, thereby increasing the interception amount of suspended solids in water, greatly improving the filtering effect, the effluent water quality and the hydraulic load, making the effluent SS ≤5 mg / L and the total phosphorus ≤0.3 mg / L, meeting the effluent water quality requirements, and reducing the filtration water head loss to 1-1.5 m; the filtration water is more easily backwashed, and the original water in the tank can be used for backwashing, without using filtered water, thereby improving the water production rate, and without needing to additionally arrange a backwashing water tank and a matching backwashing water pump, thereby saving the floor area, greatly reducing the energy consumption and engineering cost. By arranging a filter plate, the granular fiber filter material layer is supported and uniformly aerated and cleaned; by arranging air grids on the upper and lower sides of the granular fiber filter material layer, the granular fiber filter material is effectively prevented from being lost during backwashing, thereby ensuring the filtering effect.

[0042] In the description of the application, it should be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0043] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0044] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-rate settling filter characterized by, It comprises a coagulation zone (1), a flocculation zone (2), a sedimentation and filtration zone (3) and a water outlet channel (4); The coagulation zone (1), the flocculation zone (2) and the sedimentation and filtration zone (3) are sequentially arranged along the water flow direction and are in communication with each other; The sedimentation and filtration zone (3) comprises an inclined pipe (31), an air grid (32) and a filter plate (33); The air grid (32), the filter plate (33) and the inclined pipe (31) are sequentially arranged in the sedimentation and filtration zone (3) from top to bottom, and a granular fiber filter material layer (34) is arranged between the air grid (32) and the filter plate (33), wherein the specific gravity of the granular fiber filter material ranges from 1.2 to 1.4; The water outlet channel (4) is arranged at the top end of the sedimentation and filtration zone (3) and is in communication with the sedimentation and filtration zone (3).

2. The high-efficiency sedimentation filter tank according to claim 1, characterized in that, It further comprises a two-way pipe (5), a water outlet pipe (6) and a water outlet valve (7); The two-way pipe (5) is arranged on the water outlet channel (4) and is in communication with the water outlet channel (4); The water outlet pipe (6) is arranged on the two-way pipe (5) and is in communication with the two-way pipe (5); The water outlet valve (7) is arranged on the water outlet pipe (6).

3. The high-efficiency sedimentation filter tank according to claim 2, characterized in that, It further comprises a backwashing air pipe (8), a backwashing wastewater pipe (9) and a backwashing wastewater valve (10); The backwashing air pipe (8) is arranged at the top end of the sedimentation and filtration zone (3) and is in communication with the sedimentation and filtration zone (3); The backwashing wastewater pipe (9) is arranged on the two-way pipe (5) and is in communication with the two-way pipe (5); The backwashing wastewater valve (10) is arranged on the backwashing wastewater pipe (9).

4. The high efficiency sedimentation filter tank according to claim 1, characterized in that, It further comprises a sludge discharge pipe (11) and a sewage backflow pipe (12); A reverse tapered sludge collecting hopper (35) is arranged at the bottom center of the sedimentation and filtration zone (3); The sludge discharge pipe (11) is arranged at the bottom end of the sludge collecting hopper (35); One end of the sewage backflow pipe (12) is arranged above the sludge collecting hopper (35) and is in communication with the sedimentation and filtration zone (3); the other end is in communication with the flocculation zone (2).

5. The high efficiency sedimentation filter tank according to claim 1, characterized in that, The flocculation zone (2) comprises a flow guide cylinder (21) and a flocculation stirrer (22); The flow guide cylinder (21) is arranged in the flocculation zone (2); The flocculation stirrer (22) is arranged in the flow guide cylinder (21).

6. The high efficiency sedimentation filter tank according to claim 1, characterized in that The sedimentation and filtration zone (3) further comprises a sludge scraper (36); The sludge scraper (36) is arranged at the bottom end of the sedimentation and filtration zone (3) and is used to scrape off the sludge crust deposited at the bottom of the sedimentation and filtration zone (3).

7. The high-efficiency sedimentation filter tank according to claim 6, characterized in that The sedimentation and filtration zone (3) further comprises an inclined pipe flushing air pipe (37); The inclined pipe flushing air pipe (37) is arranged on the scraping arm of the sludge scraper (36), and the air outlet of the inclined pipe flushing air pipe (37) faces the inclined pipe (31).

8. The high efficiency sedimentation filter tank according to claim 1, characterized in that, The sedimentation and filtration zone (3) further comprises a first sliding groove and a second sliding groove; Two first sliding grooves are symmetrically arranged on the inner side wall of the sedimentation and filtration zone (3), and the two ends of the air grid (32) are arranged in the first sliding grooves; Two second sliding grooves are arranged in parallel below the first sliding groove, and two ends of the filter plate (33) are arranged in the second sliding grooves.

9. The high efficiency sedimentation filter tank according to claim 3, wherein An electric control cabinet is further included; The electric control cabinet is arranged on one side of the sedimentation and filtration area (3) and is electrically connected with the water outlet valve (7) and the backwashing wastewater valve (10) respectively.

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