Integrated air floatation filter tank

Abstract

The utility model relates to an integrated air flotation filter tank. The integrated air floatation filter tank comprises a tank body, a water inlet gate, a coagulation area, a flocculation area, an air floatation part and a filter area, the coagulation area, the flocculation area and the filtering area are sequentially arranged in the tank body along the water flow direction and are communicated with one another; the air floatation part is arranged at the top end of the tank body and is respectively communicated with the flocculation area and the filtering area; the water inlet gate is slidably arranged at one end of the tank body; the filter area comprises an air grid and a filter plate; the air grid and the filter plate are arranged in parallel from top to bottom, and a particle fiber filter material layer is arranged between the air grid and the filter plate. According to the scheme provided by the invention, the interception amount of suspended solids and colloidal particles in water can be increased, the head loss is greatly reduced, the required hydraulic elevation requirement can be met without arranging a lifting pump or raising the elevation of the air floatation tank, the construction cost and energy consumption are effectively reduced, the energy is saved, and the air floatation tank is simple and compact in structure, easy to backwash, high in stability and high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter tank technical field especially relates to an integrated air floatation filter tank. BACKGROUND

[0002] Air floatation filter tank is a kind of efficient sewage treatment facilities, it combines air floatation and filtration two technologies, can effectively remove the suspended solids in water, emulsified oil and other impurities.Among them, air floatation tank refers to a kind of pool mainly using a large number of micro-bubbles to capture and adsorb small particle glue to make it float, reach the effect of solid-liquid separation, in sewage depth processing or fluorine-containing wastewater treatment, air floatation tank is mainly used to remove suspended solid pollutants and total phosphorus or fluorine ion and the small floc formed by the reaction of dosing reagent, and combine the filtration technology of filter tank, to achieve higher water quality requirements.

[0003] However, since air floatation tank effluent is generally bottom effluent, and the water head loss of filter tank is generally about 2-3.5m, therefore, most air floatation filter tanks in the prior art generally need to be provided with a booster pump or to raise the elevation of the air floatation tank to meet the required hydraulic elevation requirement, thereby increasing the engineering cost or the energy consumption generated by hydraulic lifting, which is not conducive to energy saving, cost reduction and efficiency improvement.

[0004] Therefore, the utility model provides an integrated air floatation filter tank, which can improve the interception amount of suspended solids and colloidal particles in water, greatly reduce the filtration water head loss, and thus meet the required hydraulic elevation requirement without the need to provide a booster pump or raise the elevation of the air floatation tank, effectively reduce the engineering cost and energy consumption, save energy, and have a simple and compact structure, easy backwashing, high stability and strong practicality. SUMMARY

[0005] To overcome the problems in the related art, the present application provides an integrated air floatation filter tank, which can improve the interception amount of suspended solids and colloidal particles in water, greatly reduce the filtration water head loss, and thus meet the required hydraulic elevation requirement without the need to provide a booster pump or raise the elevation of the air floatation tank, effectively reduce the engineering cost and energy consumption, save energy, and have a simple and compact structure, easy backwashing, high stability and strong practicality.

[0006] The first aspect of the application provides an integrated air floatation filter tank, comprising a tank body, a water inlet gate, a coagulation zone, a flocculation zone, an air floatation part and a filtration zone; the coagulation zone, the flocculation zone and the filtration zone are sequentially arranged in the tank body along the water flow direction and are in communication with each other; wherein the coagulation zone is used for reacting suspended solids and colloidal particles in sewage with a coagulant to form small flocs; the flocculation zone is used for forming large flocs from the small flocs under the action of a flocculant; the water inlet gate is slidingly arranged at one end of the tank body; the air floatation part is arranged at the top end of the tank body and is in communication with the flocculation zone and the filtration zone respectively; the filtration zone comprises an air grid and a filter plate; the air grid and the filter plate are arranged in parallel from top to bottom, and a granular fiber filter material layer is arranged between the air grid and the filter plate, wherein the specific gravity of the granular fiber filter material ranges from 1.2 to 1.4.

[0007] In the preferred technical solution of the application, the air floatation part comprises an air floatation zone, a dissolved air storage tank, a connecting pipe and a dissolved air releaser; the air floatation zone is arranged between the flocculation zone and the filtration zone and is in communication with the flocculation zone and the filtration zone respectively; the dissolved air storage tank is arranged at the top end of the tank body; one end of the connecting pipe is in communication with the lower end of the dissolved air storage tank, and the other end is in communication with the air floatation zone; the dissolved air releaser is arranged at the bottom end of the connecting pipe.

[0008] In the preferred technical solution of the application, it further comprises a mud scraper and a sludge discharge pipe; the mud scraper is rotatably arranged in the tank body and is located above the air floatation zone and the filtration zone; the sludge discharge pipe is arranged below the mud scraper and is in communication with the tank body and is used for discharging the sludge scraped by the mud scraper.

[0009] In the preferred technical solution of the application, it further comprises a water outlet pipe and a water level adjusting valve; the water outlet pipe is arranged on the tank body and is in communication with the filtration zone; the water level adjusting valve comprises any one of an electric adjusting valve and a pneumatic adjusting valve, and the electric adjusting valve or the pneumatic adjusting valve is arranged on the water outlet pipe.

[0010] In the preferred technical solution of the application, it further comprises a backwashing air pipe, a backwashing wastewater pipe and an electric adjusting weir gate; the backwashing air pipe is arranged at the top end of the tank body and is in communication with the filtration zone; the backwashing wastewater pipe is arranged on the tank body; the electric adjusting weir gate is slidingly arranged at the top end of the tank body.

[0011] In the preferred technical solution of the application, it further comprises a water outlet backflow pipe; one end of the water outlet backflow pipe is fixed on the tank body and is in communication with the filtration zone, and the other end is in communication with the dissolved air storage tank.

[0012] In the preferable technical scheme of the present application, the water outlet filtering assembly is arranged on the pool body and is communicated with the water outlet pipe.

[0013] In the preferable technical scheme of the present application, the water outlet filtering assembly comprises a mounting box, a motor, a rotating rod, an abutting block, a spring and a filter screen; the motor is arranged on the mounting box and is connected with the rotating rod; the rotating rod is rotatably arranged in the mounting box; the abutting block is arranged at one end of the rotating rod; the filter screen is arranged in the mounting box and is located at the side of the rotating rod; one end of the spring is connected with the filter screen and the other end is fixedly connected with the mounting box.

[0014] In the preferable technical scheme of the present application, the water outlet filtering assembly further comprises a discharge port and a baffle; the discharge port is arranged at the bottom end of the mounting box; the baffle is slidably arranged in the discharge port.

[0015] In the preferable technical scheme of the present application, the agitator is arranged in the coagulation zone and the flocculation zone.

[0016] The technical scheme provided by the present application has the following beneficial effects: the integrated air flotation filter pool comprises a pool body, a water inlet gate, a coagulation zone, a flocculation zone, an air flotation part and a filtering zone. The air flotation part is arranged to enable the flocs in the sewage to adhere to the micro-bubbles and continuously float upwards, and finally continuously concentrate and form a sludge layer to realize solid-liquid separation, greatly reducing the floc particles in the sewage, improving the water quality and reducing the water head loss. Further, the granular fiber filter layer is arranged in the filtering zone, and the granular fiber filter layer has the characteristics of high void ratio, good hydrophilicity and high mechanical strength by using the granular fiber filter material with small specific gravity. Compared with other common filter materials such as quartz sand and biological ceramic filter material, the granular fiber filter layer can trap a larger amount of pollutants, can reduce the water head loss of filtered water to 1-1.5m, is easier to backwash, does not need to be provided with a lifting pump or to be elevated to meet the required hydraulic elevation requirement, greatly reduces the engineering cost and energy consumption, saves energy, and has high stability. The filter plate can provide support for the granular fiber filter layer and uniformly distribute air and clean the granular fiber filter layer. The air grid arranged above the granular fiber filter layer can effectively prevent the granular fiber filter material from being lost during backwashing, thereby ensuring the filtering effect, and the structure is simple, compact and stable. The original water in the pool body can be used for backwashing the granular fiber filter layer without using filtered water, and the practicality is high. Meanwhile, the water outlet filtering assembly arranged at the water outlet pipe can filter the water at the water outlet pipe for a long time, further effectively improving the water quality.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as claimed. BRIEF DESCRIPTION OF DRAWINGS

[0018] 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 and in which:

[0019] Figure 1 is a structural schematic diagram of an integrated air floatation filter tank shown in an embodiment of the present application;

[0020] Figure 2 is another structural schematic diagram of an integrated air floatation filter tank shown in an embodiment of the present application;

[0021] Figure 3 is an enlarged schematic diagram of A in Figure 1

[0022] Figure 4 is a structural schematic diagram of a water outlet filter assembly shown in an embodiment of the present application;

[0023] Figure 5 is an enlarged schematic diagram of B in Figure 4

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 1, tank body; 2, water inlet gate; 3, coagulation zone; 31, first coagulation zone; 32, second coagulation zone; 4, flocculation zone; 51, air floatation zone; 52, dissolved air storage tank; 53, connecting pipe; 54, dissolved air release device; 6, filtration zone; 61, air grid; 62, filter plate; 7, mud scraper; 8, mud discharge pipe; 9, water outlet pipe; 10, backwashing air pipe; 11, backwashing wastewater pipe; 12, electrically adjusted weir gate; 13, water outlet backflow pipe; 14, agitator; 15, water outlet filter assembly; 151, mounting box; 152, motor; 153, rotating rod; 154, abutting block; 155, spring; 156, filter screen; 157, discharge port; 158, baffle. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present application will be described herein below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0027] ​​The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this application and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or," as used herein, refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0028] It should be understood that although the terms "first," "second," "third," etc. can be used in this application to describe various information, the information should not be limited to these terms. These terms are only used to distinguish one piece of information from another piece of information. For example, the first information can also be called the second information, and similarly, the second information can also be called the first information without departing from the scope of the application. Therefore, the features defined with "first," "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0029] Since the effluent of the air floatation tank is generally bottom effluent, and the water head loss of the filter tank is generally about 2-3.5 m, therefore, in order to meet the effluent requirements, most of the air floatation filter tanks in the prior art generally need to be provided with a lifting pump or the elevation of the air floatation tank is raised to meet the required hydraulic elevation requirements, thereby increasing the engineering cost or increasing the energy consumption due to the hydraulic lifting, which is not conducive to energy saving, cost reduction and efficiency improvement.

[0030] In view of the above problems, the embodiment of the application provides an integrated air floatation filter tank, which can improve the interception amount of suspended matters and colloidal particles in water, greatly reduce the filtration water head loss, and thus meet the required hydraulic elevation requirements without the need of setting a lifting pump or raising the elevation of the air floatation tank, thereby effectively reducing the engineering cost and energy consumption, saving energy, and having simple and compact structure, easy backwashing, high stability and strong practicability.

[0031] The technical solutions of the embodiments of the application are described in detail below with reference to the accompanying drawings.

[0032] Embodiment one

[0033] Please refer to Figures 1-5The integrated air floatation filter tank of the present application comprises a tank body 1, an inlet gate 2, a coagulation zone 3, a flocculation zone 4, an air floatation part, a filtration zone 6 and an outlet pipe 9. The coagulation zone 3, the flocculation zone 4 and the filtration zone 6 are sequentially arranged in the tank body 1 along the water flow direction and are in communication with each other. The outlet pipe 9 is arranged on the tank body 1 and is in communication with the filtration zone 6. That is, the water in the coagulation zone 3 can flow to the flocculation zone 4, the water in the flocculation zone 4 can flow to the air floatation part, the water in the air floatation part can flow to the filtration zone 6, the water filtered by the filtration zone 6 can flow out through the outlet pipe 9. The coagulation zone 3 is used for reacting the suspended solids and colloidal particles in the sewage with a coagulant to form small flocs. The flocculation zone 4 is used for forming large flocs from the small flocs under the action of a flocculant. The air floatation part is used for concentrating the large flocs to form a sludge layer.

[0034] Specifically, the inlet gate 2 is slidingly arranged at one end of the tank body 1. When it is needed to let the sewage into the tank body 1, the inlet gate 2 is opened to make the sewage flow into the tank body 1, and vice versa. In order to make the suspended solids and colloidal particles in the sewage fully contact with the coagulant or flocculant and combine to form larger flocs (such as small flocs and large flocs) for subsequent sedimentation or filtration, the coagulation zone 3 and the flocculation zone 4 are both provided with a stirrer 14. More specifically, the coagulation zone 3 comprises a first coagulation zone 313 and a second coagulation zone 323. The first coagulation zone 313 and the second coagulation zone 323 are sequentially arranged in the tank body 1 along the water flow direction and are in communication with each other. After the sewage passes through the first coagulation zone 313, the second coagulation zone 323 and the flocculation zone 4 in sequence, it reaches the air floatation part.

[0035] The air floatation part comprises an air floatation zone 51, a dissolved air storage tank 52, a connecting pipe 53 and a dissolved air releaser 54. Specifically, the air floatation zone 51 is arranged between the flocculation zone 4 and the filtration zone 6 and is in communication with the flocculation zone 4 and the filtration zone 6 respectively. That is, the sewage in the flocculation zone 4 can flow to the air floatation zone 51, and the sewage in the air floatation zone 51 can flow to the filtration zone 6. The dissolved air storage tank 52 is arranged at the top end of the tank body 1. One end of the connecting pipe 53 is in communication with the lower end of the dissolved air storage tank 52, and the other end is in communication with the air floatation zone 51. The dissolved air releaser 54 is arranged at the bottom end of the connecting pipe 53. Through a matched air compressor, the dissolved air storage tank 52 is pressurized to make the air fully dissolve in the water in the dissolved air storage tank 52 and reach a saturated state. Then the air flows to the dissolved air releaser 54 through the connecting pipe 53. The dissolved air releaser 54 generates a large amount of micro-bubbles, so that the suspended solids and destabilized colloidal particles (flocs) in the sewage adhere to the micro-bubbles and float up with the micro-bubbles, realizing solid-liquid separation, and finally concentrating to form a sludge layer.

[0036] Further, in order to remove the sludge layer, the integrated air floatation filter tank further comprises a sludge scraper 7 and a sludge discharge pipe 8. The sludge scraper 7 is rotatably arranged above the air floatation zone 51 and the filter zone 6 in the tank body 1. The sludge discharge pipe 8 is arranged below the sludge scraper 7 and is in communication with the tank body 1, and is used to discharge the sludge scraped by the sludge scraper 7. By rotating the sludge scraper 7, the sludge scraper 7 can scrape the sludge layer, and the scraped and dropped sludge falls into the sludge discharge pipe 8 and is discharged from the tank body 1 through the sludge discharge pipe 8. It should be noted that in order to facilitate the collection of the dropped sludge, a sludge discharge channel can be arranged at the front end of the sludge discharge pipe 8 below the sludge scraper 7, and the collected sludge is discharged through the sludge discharge pipe 8.

[0037] Further, in order to facilitate water feeding to the dissolved air storage tank 52, the integrated air floatation filter tank further comprises a water outlet return pipe 13. One end of the water outlet return pipe 13 is fixed on the tank body 1 and is in communication with the filter zone 6, and the other end is in communication with the dissolved air storage tank 52. After the filtered water flows out of the water outlet return pipe 13, the filtered water in the water outlet return pipe 13 can be returned to the dissolved air storage tank 52 through a return water pump, which can effectively avoid the problem that the dissolved air storage tank 52 cannot be pressurized due to lack of water.

[0038] The filter zone 6 comprises an air grid 61 and a filter plate 62. The air grid 61 and the filter plate 62 are arranged in parallel from top to bottom, and a granular fiber filter layer is arranged between the air grid 61 and the filter plate 62. The specific gravity of the granular fiber filter layer is 1.2-1.4, and preferably, the thickness of the granular fiber filter layer is 0.8-1.2 m. By using the granular fiber filter layer with small specific gravity, the filter layer has the characteristics of high void ratio, 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 can trap a larger amount of pollutants, reduce the water head loss of filtered water to 1-1.5 m, and is easier to backwash and consumes less energy. By arranging the filter plate 62, the granular fiber filter layer can be supported and uniformly aerated and cleaned. By arranging the air grid above the granular fiber filter layer, the loss of the granular fiber filter layer during backwashing can be effectively prevented, thereby ensuring the filtering effect.

[0039] In order to keep the water level of the filtering area 6 above the granular fiber filter layer during the filtering process, the integrated air floatation filter tank further comprises a water level adjusting valve, which comprises any one of an electric adjusting valve and a pneumatic adjusting valve, and the electric adjusting valve or the pneumatic adjusting valve is arranged on the water outlet pipe 9, so as to adjust the water level in the filtering area 6 by opening or closing the electric adjusting valve or the pneumatic adjusting valve.

[0040] Further, in order to prevent the problem that the filtering effect of the granular fiber filter layer is poor due to too much sludge trapped, the integrated air floatation filter tank further comprises a backwashing air pipe 10, a backwashing wastewater pipe 11 and an electric adjusting weir gate 12, the backwashing air pipe 10 is arranged at the top end of the tank body 1 and communicates with the filtering area 6, the backwashing wastewater pipe 11 is arranged on the tank body 1, and the electric adjusting weir gate 12 is slidably arranged at the top end of the tank body 1. When the amount of sludge trapped by the granular fiber filter layer reaches a preset value, the granular fiber filter layer is uniformly aerated by using the backwashing air pipe 10, and at the same time, the granular fiber filter layer is washed by water through the backwashing wastewater pipe 11, so as to improve the washing effect of the granular fiber filter layer by using the air-water combined mode. And the backwashing wastewater enters the sludge discharge channel by moving the electric adjusting weir gate 12 downward, and is discharged through the sludge discharge pipe 8. It should be noted that the original water in the tank body 1 can be used to backwash the granular fiber filter layer, and the filtered water need not be used.

[0041] Working principle:

[0042] When the water inlet gate 2 is opened, the sewage passes through the coagulation area 3 and the coagulant to form small flocs, and then flows to the flocculation area 4 and the flocculant to form large flocs, and then the water outlet enters the air floatation area 51. At this time, the flocs in the sewage in the air floatation area 51 adhere to the micro-bubbles generated by the dissolved air release device 54, and continuously float upwards, wherein the solid flocs are continuously thickened to form a sludge layer, and then the sludge layer is scraped by the sludge scraper to fall into the sludge discharge channel and be discharged through the sludge discharge pipe 8. The liquid flows into the filtering area 6; the granular fiber filter layer in the filtering area 6 is further filtered, and the filtered clear water is discharged through the water outlet pipe 9. When the amount of sludge trapped by the granular fiber filter layer reaches a preset value, the granular fiber filter layer is uniformly aerated and washed by starting the backwashing air pipe 10 and the backwashing wastewater pipe 11, and the electric adjusting weir gate 12 is moved downward to make the backwashing wastewater enter the sludge discharge channel and be discharged through the sludge discharge pipe 8.

[0043] In the embodiment one, the integrated air floatation filter tank provided by the embodiment one of the application comprises a tank body, a water inlet gate, a coagulation zone, a flocculation zone, an air floatation part and a filtration zone. By arranging the air floatation part, the flocculation in the sewage can adhere to the micro-bubbles and continuously float upwards, and finally continuously concentrate and form a sludge layer, so that the solid-liquid separation is realized, the flocculation particles in the sewage are greatly reduced, the water quality is improved, and the water head loss is reduced. Further, the granular fiber filter layer is arranged in the filtration zone. By using the granular fiber filter material with small specific gravity, the filter layer has the characteristics of high void ratio, 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 of the application can intercept a larger amount of pollutants, can reduce the water head loss of filtered water to 1-1.5 m, is easier to backwash, does not need to be provided with a lifting pump or to raise the elevation of the air floatation tank to meet the required hydraulic elevation requirement, greatly reduces the engineering cost and energy consumption, and saves energy. By arranging the filter plate, the granular fiber filter layer can be uniformly aerated and cleaned. By arranging the air grid above the granular fiber filter layer, the granular fiber filter material can be effectively prevented from being lost during backwashing, so that the filtration effect is ensured, the structure is simple and compact, the stability is high, the original water in the tank body can be used for backwashing the granular fiber filter layer, the filtered water is not needed to be used, and the practicality is high.

[0044] Embodiment two

[0045] In order to realize further filtration of the water at the water outlet pipe and then discharge to improve the water quality, the application provides a corresponding scheme, please refer to Figures 1-5 , specifically:

[0046] On the basis of the structure of the above-mentioned embodiment one, the integrated air floatation filter tank further comprises a water outlet filtration assembly 15, which is arranged on the tank body 1 and communicates with the water outlet pipe 9, and is used for further filtering the water at the water outlet pipe 9 and then flowing out. Specifically, the water outlet filtration assembly 15 comprises a mounting box 151 and a filter screen 156. The mounting box 151 is arranged on the tank body 1 and communicates with the water outlet pipe 9. The mounting box 151 can also be arranged at one end of the water outlet pipe 9 and communicate with the water outlet pipe 9. The filter screen 156 is arranged in the mounting box 151 and is perpendicular to the water flow direction in the mounting box 151, so that the water kinetic energy in the mounting box 151 is filtered by the filter screen 156.

[0047] Further, in order to prevent the filter screen 156 from being blocked by the sludge, the water outlet filter assembly 15 further comprises a motor 152, a rotating rod 153, an abutting block 154 and a spring 155; the rotating rod 153 is rotatably arranged in the mounting box 151 and located beside the filter screen 156; the motor 152 is arranged on the mounting box 151 and connected with the rotating rod 153, for providing power for the rotating rod 153; the abutting block 154 is arranged at one end of the rotating rod 153, and one end of the spring 155 is connected with the filter screen 156 and the other end is fixedly connected with the mounting box 151. When it is needed to clean the sludge on the filter screen 156, the motor 152 is only needed to be started to drive the rotating rod 153 to rotate, and then drive the abutting block 154 to synchronously rotate, when the abutting block 154 abuts against the filter screen 156, a force towards the spring 155 is given to the filter screen 156, and the filter screen 156 is vibrated by the rebound force of the spring 155, so that the sludge adhered on the filter screen 156 is vibrated to fall down, to keep the filter screen 156 clean. Further, in order to facilitate the discharge of the sludge vibrated to fall down, the water outlet filter assembly 15 further comprises a discharge port 157 and a baffle 158; the discharge port 157 is arranged at the bottom end of the mounting box 151 and located directly below the filter screen 156, so that the sludge vibrated to fall down directly falls into the discharge port 157; in order to prevent water from leaking from the discharge port 157, the baffle 158 is slidably arranged in the discharge port 157, so that the user can open or close the baffle 158 according to the discharge requirement of the discharge port 157.

[0048] In the embodiment of the present application, by arranging the water outlet filter assembly at the water outlet pipe, the water at the water outlet pipe can be filtered for a long time, and the water quality is further effectively improved.

[0049] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and in the absence of the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0050] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated air flotation filter, characterized by, The integrated filter tank comprises a pool body (1), a water inlet gate (2), a coagulation zone (3), a flocculation zone (4), an air floatation part and a filter zone (6). The coagulation zone (3), the flocculation zone (4) and the filter zone (6) are sequentially arranged in the pool body (1) along the water flow direction and are in communication with each other. The coagulation zone (3) is used for reacting suspended solids and colloidal particles in sewage with a coagulant to form small flocs; the flocculation zone (4) is used for forming large flocs from the small flocs under the action of a flocculant. The water inlet gate (2) is slidably arranged at one end of the pool body (1). The air floatation part is arranged at the top end of the pool body and is in communication with the flocculation zone (4) and the filter zone (6) respectively. The filter zone (6) comprises an air grid (61) and a filter plate (62); the air grid (61) and the filter plate (62) are arranged in parallel from top to bottom, and a granular fiber filter material layer is arranged between the air grid (61) and the filter plate (62), wherein the specific gravity of the granular fiber filter material ranges from 1.2 to 1.

4.

2. The integrated filter tank according to claim 1, wherein The air floatation part comprises an air floatation zone (51), a dissolved air storage tank (52), a connecting pipe (53) and a dissolved air releaser (54). The air floatation zone (51) is arranged between the flocculation zone (4) and the filter zone (6) and is in communication with the flocculation zone (4) and the filter zone (6) respectively. The dissolved air storage tank (52) is arranged at the top end of the pool body (1). One end of the connecting pipe (53) is in communication with the lower end of the dissolved air storage tank (52), and the other end is in communication with the air floatation zone (51). The dissolved air releaser (54) is arranged at the bottom end of the connecting pipe (53).

3. The integrated dissolved air flotation filter according to claim 2, characterized in that The integrated filter tank further comprises a mud scraper (7) and a mud discharge pipe (8). The mud scraper (7) is rotatably arranged in the pool body (1) and is located above the air floatation zone (51) and the filter zone (6). The mud discharge pipe (8) is arranged below the mud scraper (7) and is in communication with the pool body (1) and is used for discharging the sludge scraped by the mud scraper (7).

4. The one-piece air flotation filter basin of claim 1, wherein, The integrated filter tank further comprises a water outlet pipe (9) and a water level adjusting valve. The water outlet pipe (9) is arranged on the pool body (1) and is in communication with the filter zone (6). The water level adjusting valve comprises any one of an electric adjusting valve and a pneumatic adjusting valve, and the electric adjusting valve or the pneumatic adjusting valve is arranged on the water outlet pipe (9).

5. The one-piece air flotation filter basin of claim 1, wherein, The integrated filter tank further comprises a backwashing air pipe (10), a backwashing wastewater pipe (11) and an electric adjusting weir gate (12). The backwashing air pipe (10) is arranged at the top end of the pool body (1) and is in communication with the filter zone (6). The backwashing wastewater pipe (11) is arranged on the pool body (1). The electric adjusting weir gate (12) is slidably arranged at the top end of the pool body (1).

6. The one-piece air flotation filter basin of claim 2, wherein, The integrated filter tank further comprises a water outlet backflow pipe (13). One end of the water outlet backflow pipe (13) is fixed on the pool body (1) and is in communication with the filter zone (6), and the other end is in communication with the dissolved air storage tank (52).

7. The integrated air flotation filter basin of claim 4, wherein, The water outlet filter assembly (15) is arranged on the pool body (1) and communicates with the water outlet pipe (9).

8. The integrated air flotation filter pool according to claim 7, characterized in that, The water outlet filter assembly (15) comprises a mounting box (151), a motor (152), a rotating rod (153), an abutting block (154), a spring (155) and a filter screen (156). The motor (152) is arranged on the mounting box (151) and connected with the rotating rod (153). The rotating rod (153) is rotatably arranged in the mounting box (151). The abutting block (154) is arranged at one end of the rotating rod (153). The filter screen (156) is arranged in the mounting box (151) and located beside the rotating rod (153). One end of the spring (155) is connected with the filter screen (156) and the other end is fixedly connected with the mounting box (151).

9. The integrated air flotation filter pool according to claim 8, characterized in that, The water outlet filter assembly (15) further comprises a discharge port (157) and a baffle (158). The discharge port (157) is arranged at the bottom end of the mounting box (151). The baffle (158) is slidably arranged in the discharge port (157).

10. The integrated air flotation filter pool according to claim 1, characterized in that, The coagulation zone (3) and the flocculation zone (4) are both provided with a stirrer (14). ​

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