CN215975343U

CN215975343U - Air supporting filtering pond integrated device

Info

Publication number: CN215975343U
Application number: CN202123118409.8U
Authority: CN
Inventors: 李桂平; 方杰
Original assignee: Shandong Yaxin Environmental Protection Technology Co ltd
Current assignee: Shandong Yaxin Environmental Protection Technology Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-03-08
Anticipated expiration: 2031-12-08
Also published as: WO2023102958A1

Abstract

The utility model provides an air-flotation filter integrated device, and belongs to the field of water treatment equipment. The device comprises a quick mixing tank, a water distribution tank, a flocculation tank, a flotation filter tank and a scum tank, wherein the water outlet of the quick mixing tank overflows to the water distribution tank through a top overflow water distribution pipe and then is injected into the bottom of the flocculation tank through a communicating pipe at the bottom of the water distribution tank, and the water outlet of the flocculation tank enters the flotation filter tank through a guide flow cylinder; finishing flotation at the upper part of the flotation filter tank, scraping generated scum into a scum groove and automatically flowing into the scum tank, finishing filtration of the floated water at the lower part and discharging the water from a water outlet; during backwashing, air is introduced into the backwashing air distribution pipe to scrub the air, water is injected into the backwashing water inlet pipe to be flushed by the water, and backwashing wastewater is discharged from the backwashing water discharge tank. The water outlet of the quick mixing tank is uniformly distributed; the flocculation tank has no hydraulic short flow; an adjustable dissolved air releaser is adopted to prevent the releaser from being blocked; the prefabricated filter plates are spliced, so that the whole flatness of the filter plates is high; and a scum pool with a concentration function is arranged, so that the discharged sludge amount is reduced.

Description

Air supporting filtering pond integrated device

Technical Field

The utility model belongs to the field of water treatment equipment, and particularly relates to an air-flotation filter integrated device.

Background

The traditional water treatment process comprises air floatation and filtration processes. The sewage contains a large amount of oils, including oil slick, dispersed oil, emulsified oil, dissolved oil and the like, the air floatation process is to dissolve air into water under certain pressure in advance to form a supersaturated gas-water mixture, then after decompression release of a releaser, the air originally dissolved in the water forms a large amount of micro bubbles, the micro bubbles are combined with the fine oils and suspended particles in the sewage after coagulation and flocculation, as the integral density is reduced after combination, the particles slowly float to the surface of the water to form floating slag, and finally the floating slag is scraped away and discharged through a slag scraping system to realize oil-water separation, so that the oil content and the suspended substance concentration in the treated water are greatly reduced, and the oil slick, the dispersed oil and the emulsified oil have good removal effect; the filtering process is characterized in that fine-particle filtering materials are stacked to form a filtering layer with a certain height, fine gaps are formed among the fine particles, so that water can be discharged through the filtering layer, particles in the water are difficult to pass through the fine gaps and are intercepted to the filtering layer, and meanwhile, the intercepted fine particles also have a certain auxiliary effect on filtering. Along with the filterable process, originally fill gradually by the tiny particle in aqueous in the clean filtering layer gap, the filtration layer's of certain cycle back water resistance increases, loses the filtration purification effect gradually, at this moment, need adopt water backwash and gas backwash, the tiny particle back flush that intercepts the filtering layer, arrange the discharge from the filtering layer branch, make the filtering layer resume and filter the interception function.

There are two ways to realize air floatation and filtration processes in water treatment. Firstly, air floatation and filtration are separately arranged, the air floatation device is usually arranged first, the filtration device is arranged later, the treatment effect can meet the water treatment requirement, but the occupied area is large, the size of a foundation structure is large, the construction cost is high, multiple water distribution is needed during water treatment, and the requirements on elevation and energy consumption are high; and secondly, a flotation tank of air flotation is longitudinally superposed on a filter tank to form an air flotation filter tank, oil and suspended matters are removed from the upper part of the flotation filter tank after the inlet water is quickly mixed and flocculated, the water at the lower part of the flotation filter tank is filtered by a filter plate right below the flotation filter tank to remove residual fine particulate matters, and finally the filtered outlet water has low content of suspended matters, low turbidity and good water quality.

In the prior art, the combined air flotation filter tank has the following problems in design and operation:

1) when water is distributed after the quick mixing tank, the overflow water distribution pipe is arranged in the flocculation tank, a control valve on the overflow water distribution pipe is positioned under water, the valve needs to be customized and is soaked under water for a long time, so that the corrosion is serious, the failure rate is high, and the maintenance is difficult;

2) the flocculation tank adopts an upper water inlet and upper water outlet mode, hydraulic short flow often occurs, the flocculation effect is poor, and the treatment effect of the air floatation filter tank is further influenced;

3) the dissolved air releaser generally adopts a fixed opening form, so that the releaser is often blocked by particles carried in backflow water, but the releaser is positioned underwater and cannot be overhauled in time, so that the dissolved air release efficiency is low, and the air floatation effect does not reach the standard;

4) the bottom filter plate of the flotation filter tank adopts cast-in-place, the flatness of the filter plate in the filter area is difficult to control, and then the water flow uniform distribution in the filter area is influenced, channeling and filter material dirt interception are easy to occur and are distributed unevenly, so that the water quality is penetrated and accelerated, the water quality of outlet water is rapidly deteriorated, and the backwashing period is short.

Disclosure of Invention

In view of the problems in the prior art, the utility model provides an integrated device of an air flotation filter tank, which combines the air flotation tank and a filter tank, simultaneously realizes air flotation and filtration processes, improves the dissolved air release effect, prolongs the backwashing period, reduces the maintenance difficulty, reduces the operation and maintenance cost of equipment and improves the operation stability of the equipment on the premise of ensuring the water treatment effect.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an integrated air flotation filter device, comprising: at least one fast mixing tank 2, at least one pair of distribution tanks 4, at least one pair of flocculation tanks 8, at least one pair of flotation filtration tanks 13 and at least one scum tank 26; wherein the content of the first and second substances,

the bottom of the first side surface of the quick mixing tank 2 is provided with a water inlet pipe 1, the second side surface and the third side surface which are adjacent to the first side surface are symmetrically provided with two distribution tanks 4, and the outside of the fourth side surface which is opposite to the first side surface and is closely adjacent to the distribution tanks 4 are symmetrically provided with at least two common flocculation tanks 8; the upper parts of the second side and the third side of the rapid mixing tank 2 are provided with holes communicated with the distribution tank 4; the bottom surface of the rapid mixing tank 2 is not lower than the bottom surface of the distribution tank 4; a quick mixing stirrer 3 is arranged in the quick mixing tank;

a water distribution overflow pipe 5 is arranged in the water distribution tank 4 corresponding to the hole of the quick mixing tank 2; the bottom surface of the distribution tank 4 is higher than the bottom surface of the flocculation tank 5; the bottom of the distribution tank 4 is provided with a communicating pipe 6, and the communicating pipe 6 is communicated with the bottom of the first side surface of the flocculation tank 8 downwards; an automatic control valve 7 is arranged on the communicating pipe 6;

the first side surface of the flocculation tank 8 is closely adjacent to the distribution tank 4, and the bottom surface of the flocculation tank is lower than the bottom surface of the distribution tank; a flotation filter tank 13 which is arranged on the same side is symmetrically arranged on the fourth side of the flocculation tank 8 which is opposite to the first side, the bottom of the fourth side is provided with an opening communicated with the flotation filter tank 13, and a steady flow cylinder 10 corresponding to the opening is arranged in the flocculation tank 8; the bottom of the flow stabilizing cylinder 10 is opposite to the opening and is sealed at an angle of 45 degrees, the top of the flow stabilizing cylinder 10 is open, and the surface of the open is lower than the working liquid level of the flocculation tank 8; a flocculation stirrer 9 is arranged in the flocculation tank 8;

the first side face of the flotation filter tank 13 is closely adjacent to the fourth side face of the flocculation tank 8, a fifth side face shorter than the first side face is arranged in the first side face, and the second side face and the third side face are respectively vertically adjacent to the first side face; the bottom of the fifth side surface is vertical to the inner bottom surface of the flotation filter tank 13, two ends of the fifth side surface are vertically connected with the second side surface and the third side surface, the flotation filter tank 13 is divided into a front area and a rear area, and the front area and the rear area are communicated at the upper side of the fifth side surface; a scum groove 25 is arranged on the outer edge of the upper end of the fourth side surface opposite to the first side surface, and a scum pool 26 is arranged on the outer side of the second side surface or the third side surface in close proximity; the scum trough 25 is communicated with the scum pool 26;

the bottom of the front region of the flotation filter tank 13 is provided with a dissolved air releaser 11; the dissolved air releaser 11 is adjustable and provided with an extension bar, and the opening degree of the underwater releaser can be adjusted in real time at the top of the device through the extension bar; the dissolved air releaser 11 is connected with a pressurized dissolved air device 12;

the back area of the flotation filter tank 13 is sequentially provided with a backwashing air distribution pipe 19, a water distribution filter beam 16, a filter plate 15, a filter material 24 and a backwashing drainage tank 18 from bottom to top; a water passing hole is reserved on the water distribution filter beam 16, and a backwashing gas distribution pipe 19 is arranged in the water passing hole of the water distribution filter beam 16; the filtering plate 15 is fixed on the upper surface of the water distribution filtering beam 16; the backwashing water draining tank 18 is arranged below the water surface of the flotation filtering tank and above the filtering material 24; a shearing water spraying pipe 14 and a fixed rolling shaft slag scraper 17 are arranged at the top of the flotation filtering tank corresponding to the rear area, and the fixed rolling shaft slag scraper 17 is arranged above the floating slag groove 25;

a water outlet pipe 20 and a backwashing water inlet pipe 22 extending out of the tank body are arranged at the bottom of the fourth side of the flotation filtering tank 13, a water outlet control valve 21 is arranged on the water outlet pipe 20, and a backwashing water inlet control valve 23 is arranged on the backwashing water inlet pipe 22;

the scum pond 26 is funnel-shaped, and a scum discharge pipe 27 is arranged at the bottom of the funnel.

In the above scheme, overflow distribution pipe 5 comprises straight tube, 90 elbows, bellmouth, adjustable ring, the straight tube is connected at the opening part of mixing pond 2 and distribution tank 4 intercommunication soon, and 90 elbows one end is connected with the straight tube, and the other end is vertical upwards, and with the bellmouth xiao is connected, the bellmouth is vertical to be placed, and the osculum is under, the macrostoma is at last, and the macrostoma bead keeps the level, bellmouth macrostoma upper portion is equipped with the adjustable ring cover, adjustable water outlet weir crest height.

In the scheme, the quick mixing stirrer 3 is arranged in the center of the quick mixing pool 2 and adopts a folding paddle type or a propelling type; the flocculation stirrer 9 is arranged in the center of the flocculation tank 8 and adopts a folding paddle type or a propelling type.

In the scheme, two ends of the shearing water spraying pipe 14 are arranged on the upper tank wall of the first side surface and the upper tank wall of the fourth side surface of the flotation filter tank 13 in a spanning manner, the water spraying pipes which are parallel to the second side surface and the fourth side surface are respectively arranged near the second side surface and the third side surface, and the water spraying pipes are provided with one spray head every 500-1000 mm.

In the scheme, the backwashing water discharge tank 18 consists of two semicircular or rectangular tanks, one end of the backwashing water discharge tank 18 is closed, and the other end of the backwashing water discharge tank extends out of the device; the part extending out of the device is provided with a water outlet.

In the scheme, the filter plate 15 is square, the side length is 500-1000 mm, and the thickness is 80-120 mm; the long-handle filter heads are uniformly distributed on the surface of the filter plate 15, and the number of the long-handle filter heads of each filter plate is 36-64.

In the above scheme, the filter plates 15 adopt a prefabricated filter plate splicing mode.

In the scheme, the filter material 25 is uniformly paved on the upper layer and the lower layer right above the filter plate, the quartz sand is paved on the lower layer, and the anthracite or activated carbon filter material is paved on the upper layer.

In the above scheme, the water distribution filter beam 16 is vertically upwards and uniformly provided with 25-40 mm air outlet pipes, and the distance between the air outlet pipes is 800-1500 mm.

In the above scheme, the water outlet pipe 20 and the backwash water inlet pipe 22 share one main pipe.

In the scheme, the main bodies of the quick mixing tank 2, the water distribution tank 4, the flocculation tank 8, the flotation filter tank 13 and the scum tank 26 of the device are of concrete and/or steel structures.

The utility model has the following beneficial effects:

the integrated device of the air-float filter tank provided by the embodiment of the utility model comprises at least one quick mixing tank, at least one pair of water distribution tanks, at least one pair of flocculation tanks, at least one pair of flotation filter tanks and at least one scum tank, wherein the bottom of the side surface of the quick mixing tank is provided with a water inlet pipe orifice, two sides of the top of the quick mixing tank are symmetrically provided with overflow water distribution pipes, water in the quick mixing tank automatically flows to the water distribution tanks at two sides through the overflow water distribution pipes, the bottom of the water distribution tank is connected with the bottom of the flocculation tank by using a communicating pipe, a control valve is arranged on the communicating pipe, the flocculation tank is water inlet at the bottom and water outlet at the upper part and automatically flows into the flotation filter tank, the sewage to be treated is floated at the upper part of the flotation filter tank, scum is scraped into the scum tank and automatically flows into the scum tank, the water after flotation is floated and filtered by the lower part of the flotation filter tank and is discharged from a water outlet, and after the device runs for a period of time, backwashing is needed to recover the filtering capacity of a filter layer, when entering backwashing, the backwashing air distribution pipe is filled with air, after the air scrubbing is finished, the backwashing water inlet pipe is filled with backwashing water, and the backwashing water is finally discharged from the backwashing water discharge tank. According to the embodiment of the utility model, air floatation and filtration are combined in the same structure to form the air floatation filtration tank, so that the floor area is saved; the water outlet of the quick mixing tank is provided with symmetrical overflow weir grooves, so that the uniform water distribution of two rows of subsequent parallel flocculation tanks can be realized; after uniform water distribution, the effluent is conveyed to the lower part of the flocculation tank through an external pipeline, a switch valve is arranged on the pipeline to realize the control of the water inlet of the single-row flocculation tank, and the external valve avoids the problems of high failure rate and difficult maintenance of an underwater valve adopted by the prior similar process; the flocculation tank adopts lower water inlet and upper water outlet, thus solving the problem of hydraulic short flow existing in the prior similar process; the dissolved air releaser positioned at the bottom of the flotation filter tank adopts an adjustable type and is provided with an extension bar, so that the underwater releaser can be adjusted on the water surface in real time, and the problems that the traditional fixed dissolved air releaser is easy to block and cannot be maintained on line can be solved; the filter system at the bottom of the filter tank adopts a prefabricated filter plate splicing mode, so that the actual installation and adjustment are facilitated, the better installation flatness is achieved, and the problem that the flatness is difficult to control in the field pouring of filter plates is solved; the air floatation filter tank is provided with a scum tank, scum is concentrated and then discharged out of the scum tank, and the amount of discharged sludge is obviously reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a structural plan view of an integrated air-floating filter device provided in an embodiment of the present invention;

FIG. 2 is a top view of a top structure of the integrated air-floating filter device according to the embodiment of the present invention;

FIG. 3 is a top view of a bottom structure of the integrated air-floating filter device according to the embodiment of the present invention;

FIG. 4 is a sectional view A-A of the integrated air-floating filter apparatus shown in FIGS. 1-3 according to the embodiment of the present invention;

FIG. 5 is a sectional view B-B of the integrated air-floating filter tank apparatus shown in FIGS. 1-3 according to the embodiment of the present invention;

fig. 6 is a schematic structural view of a scum pond in a section C-C of the integrated air-flotation filter tank device shown in fig. 1-3 according to an embodiment of the present invention.

Description of reference numerals:

1-water inlet pipe, 2-fast mixing tank, 3-fast mixing tank stirrer, 4-water distribution tank, 5-overflow water distribution pipe, 6-communicating pipe, 7-automatic control valve, 8-flocculation tank, 9-flocculation tank stirrer, 10-steady flow cylinder, 11-dissolved air releaser, 12-pressurized dissolved air device, 13-flotation filtration tank, 14-shearing spray pipe, 15-filtration filter plate, 16-water distribution filter beam, 17-fixed roller slag scraper, 18-backwashing drainage tank, 19-backwashing air distribution pipe, 20-water outlet pipe, 21-water outlet control valve, 22-backwashing water inlet control valve, 23-backwashing water inlet pipe, 24-filtration material, 25-scum tank, 26-scum tank and 27-scum discharge pipe.

Detailed Description

The technical problems, aspects and advantages of the present invention will be explained in detail below with reference to exemplary embodiments and with reference to the accompanying drawings. The following exemplary embodiments are merely illustrative of the present invention and are not to be construed as limiting the utility model. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" 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 "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, an embodiment of the present invention provides an integrated apparatus of an air-floating filter, including: at least one fast mixing tank 2, at least one pair of distribution tanks 4, at least one pair of flocculation tanks 8, at least one pair of flotation filtration tanks 13 and at least one scum tank 26.

The bottom of the first side surface of the quick mixing tank 2 is provided with a water inlet pipe 1, a second side surface and a third side surface which are adjacent to the first side surface are symmetrically provided with a water distribution tank 4, and a common flocculation tank 8 is symmetrically arranged outside a fourth side surface which is opposite to the first side surface and is close to the water distribution tank 4; the upper parts of the second side and the third side of the rapid mixing tank 2 are provided with holes communicated with the distribution tank 4; the bottom surface of the rapid mixing tank 2 is not lower than the bottom surface of the distribution tank 4; the fast mixing tank 2 is internally provided with a fast mixing stirrer 3.

A water distribution overflow pipe 5 is arranged in the water distribution tank 4 corresponding to the hole of the quick mixing tank 2; the bottom surface of the distribution tank 4 is higher than the bottom surface of the flocculation tank 8; the bottom of the distribution tank 4 is provided with a communicating pipe 6 which is communicated with the bottom of the first side surface of the flocculation tank 8 downwards; and the communicating pipe 6 is provided with an automatic control valve 7. The two symmetrical distribution tanks 4 are respectively and independently communicated with the corresponding flocculation tanks 8 through communicating pipes 6 and automatic control valves 7, so that the control of single-row flocculation water inlet is realized, and the automatic control valves 7 are in a dry installation mode.

The first side surface of the flocculation tank 8 is closely adjacent to the distribution tank 4, and the bottom of the flocculation tank is lower than the bottom surface of the distribution tank 4; a flotation filter tank 13 which is arranged on the same side is symmetrically arranged on the fourth side surface which is just opposite to the first side surface of the flocculation tank 8, the bottom of the fourth side surface is provided with an opening communicated with the flotation filter tank 13, and a steady flow cylinder 10 with a semicircular section corresponding to the opening is arranged in the flocculation tank 8; the bottom of the flow stabilizing cylinder 10 is opposite to the opening and is sealed at an angle of 45 degrees, the top of the flow stabilizing cylinder 10 is open, and the surface of the opening is lower than the working liquid level of the flocculation tank 8, so that water is discharged from the flocculation tank, and water is fed into the lower part of the flotation filter tank; a flocculation stirrer 9 is arranged in the flocculation tank 8.

The first side surface of the flotation filter tank 13 is closely adjacent to the fourth side surface of the flocculation tank 8, a fifth side surface which is shorter than the first side surface is arranged in the first side surface, the second side surface and the third side surface are respectively vertically adjacent to the first side surface, the bottom of the fifth side surface is vertical to the bottom surface of the flotation filter tank, two ends of the fifth side surface are vertically connected with the second side surface and the third side surface, the flotation filter tank is divided into a front area and a rear area, and the front area and the rear area are communicated on the upper side of the fifth side surface; a scum groove 25 is arranged on the outer edge of the upper end of the fourth side surface opposite to the first side surface, and a scum pool 26 is arranged close to the second side surface or the third side surface; the scum trough 25 is communicated with the scum pool 26.

The bottom of the front region of the flotation filter tank 13 is provided with a dissolved air releaser 11; the dissolved air releaser 11 adopts an adjustable extension bar, can realize real-time adjustment of underwater release on the water surface through the extension bar at the top of the device, and solves the problems that the traditional fixed dissolved air releaser is easy to block and cannot be overhauled on line. The dissolved air releaser 11 is connected with a pressurized dissolved air device 12 for providing pressurized dissolved air water for the dissolved air releaser 11. The pressurizing and air dissolving device 12 comprises a pressurizing pump, an air dissolving tank and a compressed air supply device.

The back area of the flotation filter tank 13 is sequentially provided with a backwashing air distribution pipe 19, a water distribution filter beam 16, a filter plate 15, a filter material 24 and a backwashing drainage tank 18 from bottom to top; a water passing hole is reserved on the water distribution filter beam 16, and a backwashing gas distribution pipe 19 is arranged in the water passing hole of the water distribution filter beam 16; the filter plate 15 is fixed on the upper surface of the water distribution filter beam 16, and a prefabricated filter plate splicing mode is adopted, so that actual installation and adjustment are facilitated, better installation flatness is achieved, and the problem that flatness is difficult to control in site pouring of the filter plate is solved; the backwashing water draining tank 18 is arranged below the water surface of the flotation filtering tank 13 and above the filtering material 24; and a shearing water spraying pipe 14 and a fixed roller slag scraping machine 17 are arranged at the top of the flotation filtering tank corresponding to the rear area, and the fixed roller slag scraping machine 17 is arranged above the floating slag groove.

And a water outlet pipe 20 and a backwashing water inlet pipe 22 extending out of the tank body are arranged at the bottom of the fourth side of the flotation filtering tank 13, a water outlet control valve 21 is arranged on the water outlet pipe 20, and a backwashing water inlet control valve 23 is arranged on the backwashing water inlet pipe 22.

In a preferred embodiment of the utility model, the overflow water distribution pipe 5 comprises a straight pipe, a 90-degree elbow, a bell mouth and an adjusting ring, the straight pipe is connected to an opening of the rapid mixing tank communicated with the water distribution tank, one end of the 90-degree elbow is connected with the straight pipe, the other end of the 90-degree elbow is vertically upward and is connected with the small mouth of the bell mouth, the bell mouth is vertically arranged, the small mouth is arranged at the lower part and the large mouth is arranged at the upper part, the bead of the large mouth is kept horizontal, and the upper part of the large mouth of the bell mouth is provided with the adjusting ring sleeve which can adjust the height of the water outlet weir mouth.

In a preferred embodiment of the present invention, the fast mixing agitator 3 is arranged at the right center of the fast mixing tank 2, and adopts a paddle folding type or a propeller type; the flocculation stirrer 9 is arranged in the center of the flocculation tank 8 and adopts a folding paddle type or a propelling type.

In a preferred embodiment of the present invention, the two ends of the shearing water spraying pipe 14 are arranged across the upper tank wall of the first side and the fourth side of the flotation filter tank 13, a water spraying pipe parallel to the second side and the fourth side is arranged near the second side and the third side respectively, and a nozzle is arranged on the water spraying pipe every 500-1000 mm.

In a preferred embodiment of the present invention, the fixed roller slag scraper 17 and the shear water spray pipe 14 are operated intermittently, and the operation of the fixed roller slag scraper 17 and the shear water spray pipe 14 is controlled manually or automatically according to the amount of the floating slag on the surface of the flotation filter tank 13. When the fixed roller slag scraper 17 operates, the scum on the surface of the flotation filter tank 13 is scraped into the scum trough 25. Scum is scraped to a scum trough 25 by the rotation of a fixed roller scum scraper 17 arranged at the tail end of the air floatation filter tank 13 and flows into a scum tank 26 automatically.

In a preferred embodiment of the present invention, the scum pond 26 is provided with two slopes, the slope bottom is a funnel bottom, the scum slowly sinks to the slope bottom along the slopes, a scum discharge pipe 27 is arranged at the slope bottom, and the scum is finally discharged through the scum discharge pipe 27.

In a preferred embodiment of the utility model, the backwashing water discharge tank 18 consists of 2 semicircular or rectangular tanks, one end of the backwashing water discharge tank 18 is closed, and the other end of the backwashing water discharge tank extends out of the tank body; the part extending out of the tank body is provided with a water outlet.

In a preferred embodiment of the utility model, the filter plate 15 is square, the side length is 500-1000 mm, and the thickness is 80-120 mm; long-handle filter heads are uniformly distributed on the surface of the filter plate 15, and the number of the long-handle filter heads of each filter plate is 36-64; a plurality of square filter plates 15 are spliced and cover the bottom of the flotation filter tank 13.

In a preferred embodiment of the present invention, the filter material 24 is uniformly laid on the upper and lower layers of the filter material 15, the lower layer is laid with quartz sand, and the upper layer is laid with anthracite or activated carbon filter material.

In a preferred embodiment of the utility model, the water distribution filter beam 16 is arranged at the bottommost part of the flotation filter tank 13, 25-40 mm of air outlet pipes are uniformly arranged vertically upwards, and the distance between the air outlet pipes is 800-1500 mm.

In a preferred embodiment of the present invention, the water outlet pipe 20 and the backwash water inlet pipe 23 share a main pipe.

In a preferred embodiment of the utility model, the fast mixing tank 2, the distribution tank 4, the flocculation tank 8, the flotation filter tank 13 and the scum tank 26 which constitute the device are mainly of concrete and/or steel construction.

When the integrated air-floating filter tank device is used for water treatment, the integrated air-floating filter tank device comprises a starting operation stage and a stopping backwashing stage.

In the boot operation stage:

water to be treated enters the rapid mixing tank 2 through the water inlet pipe 1, and after water enters the rapid mixing tank, the rapid mixing tank stirrer 3 is started to stir and mix;

the water discharged from the rapid mixing tank 2 is uniformly distributed through the overflow water distribution pipe 5 and then flows to the water distribution tank 4, and the water discharged from the water distribution tank 4 enters the flocculation tank 8 through the communicating pipe 6;

after the flocculation tank 8 is filled with water, starting the flocculation tank stirrer 9 for stirring, and after the liquid level of the flocculation tank reaches the top half-round opening of the flow stabilizing cylinder 10, automatically flowing the water to the bottom of the front end of the flotation filter tank 13;

after the liquid level of the flotation filter tank 13 reaches the working liquid level, the dissolved air releaser 11 is opened, the pressurized dissolved air water is released by the dissolved air releaser 11 and then enters the flotation filter tank 13, the released micro-bubbles are combined with oil and suspended matters in the water and slowly float to the water surface, floating slag formed by the oil and the suspended matters is scraped to the floating slag groove 25 through the fixed roller slag scraper 17 and the shearing water spray pipe 14, finally flows to the floating slag tank 26 automatically and is discharged out of the device through the floating slag discharge pipe 27;

the purified water vertically flows downwards through the filter material 24, the fine particles remained in the water are intercepted and trapped by the filter material 24, and the clean water sequentially passes through the long-handle filter heads uniformly distributed on the surface of the filter plate 15 and the water passing holes at the bottom of the water distribution filter beam 16 and is finally discharged by the water outlet pipe 20.

In the shutdown backwashing stage:

when the filter material 24 intercepts and intercepts fine particles in the intercepted water and reaches saturation or the water quality of the discharged water of the water outlet pipe exceeds a required index, the automatic control valve 7 at the inlet of the flocculation tank 8 needs to be closed, and corresponding water inlet is cut off;

when the water inlet of the flotation filter tank 13 is cut off, the water level gradually drops, and when the water level of the flotation filter tank 13 is about 300-500 mm away from the surface of the filter material 24, the water outlet control valve 21 is closed;

the backwashing air distribution pipe 19 is connected with air, and the filter material 24 is scrubbed reversely from bottom to top through the air, so that the filter material 24 is loosened and the intercepted fine particles are washed out; the process lasts for 3-5 min, and after the process is finished, the air of the backwashing air distribution pipe 19 is stopped;

after the air scrubbing is finished, water backwashing is carried out; the backwashing water inlet control valve 22 is opened, the backwashing water inlet pipe 23 is connected with clean water, the clean water enters the flotation filter tank 13, then sequentially passes through the water passing hole at the bottom of the water distribution filter beam (16) and the long handle filter heads uniformly distributed on the surface of the filter plate 15, passes through the filter material 24 all the way up, and finally is discharged out of the device from the backwashing water discharge tank 18, fine particles washed out by air scrubbing are taken out all the way, and the filtering capacity of the filter material 24 is recovered; the process lasts for 5-8 min, and the starting operation stage is re-entered after the process is finished.

According to the technical scheme, the integrated device of the air floatation filter tank provided by the embodiment of the utility model is characterized in that water inlet pipe openings are arranged at the bottom of the side surface of a quick mixing tank, overflow water distribution pipes are symmetrically arranged at two sides of the top of the quick mixing tank, water in the quick mixing tank flows to the water distribution tanks at two sides through the overflow water distribution pipes, the bottom of the water distribution tank is connected with the bottom of a flocculation tank through a communicating pipe, a control valve is arranged on the communicating pipe, the flocculation tank is filled with water at the bottom and drained from the upper part and flows into a flotation filter tank, sewage to be treated is floated at the upper part of the flotation filter tank, scum is scraped into a scum groove and flows into a scum tank, the floated water is floated and filtered through the lower part of the flotation filter tank and is drained from a water outlet, when the device runs for a period of time, backwashing is needed to recover the filtering capability of a filter layer, when backwashing is carried out, air is firstly introduced through a backwashing air distribution pipe, after air scrubbing is finished, backwashing water is introduced through a backwashing water inlet pipe, the backwash water is finally discharged from the backwash water discharge tank. According to the embodiment of the utility model, air floatation and filtration are combined in the same structure to form the air floatation filtration tank, so that the floor area is saved; the water outlet of the quick mixing tank is provided with symmetrical overflow weir grooves, so that the uniform water distribution of two rows of subsequent parallel flocculation tanks can be realized; after uniform water distribution, the effluent is conveyed to the lower part of the flocculation tank through an external pipeline, a switch valve is arranged on the pipeline to realize the control of the water inlet of the single-row flocculation tank, and the external valve avoids the problems of high failure rate and difficult maintenance of an underwater valve adopted by the prior similar process; the flocculation tank adopts lower water inlet and upper water outlet, thus solving the problem of hydraulic short flow existing in the prior similar process; the dissolved air releaser positioned at the bottom of the flotation filter tank adopts an adjustable type and is provided with an extension bar, so that the underwater releaser can be adjusted on the water surface in real time, and the problems that the traditional fixed dissolved air releaser is easy to block and cannot be maintained on line can be solved; the filter system at the bottom of the filter tank adopts a prefabricated filter plate splicing mode, so that the actual installation and adjustment are facilitated, the better installation flatness is achieved, and the problem that the flatness is difficult to control in the field pouring of filter plates is solved; the air floatation filter tank is provided with a scum tank, scum is concentrated and then discharged out of the scum tank, and the amount of discharged sludge is obviously reduced.

Those of ordinary skill in the art will understand that: the components in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be correspondingly changed in one or more devices different from the embodiments. The components of the above embodiments may be combined into one component, or may be further divided into a plurality of sub-components.

While the foregoing is directed to the preferred embodiment of the present invention, it is understood that the utility model is not limited to the exemplary embodiments disclosed, but is made merely for the purpose of providing those skilled in the relevant art with a comprehensive understanding of the specific details of the utility model. It will be apparent to those skilled in the art that various modifications and adaptations of the present invention can be made without departing from the principles of the utility model and the scope of the utility model is to be determined by the claims.

Claims

1. The integrated device for the air floatation filter tank is characterized by comprising: the system comprises at least one quick mixing tank, at least one pair of distribution tanks, at least one pair of flocculation tanks, at least one pair of flotation filter tanks and at least one scum tank; wherein the content of the first and second substances,

the bottom of the first side face of the quick mixing tank is provided with a water inlet pipe, a second side face and a third side face which are adjacent to the first side face are symmetrically provided with two distribution tanks, and at least two common-edge flocculation tanks are symmetrically arranged outside a fourth side face which is opposite to the first side face and are close to the distribution tanks; the upper parts of the second side and the third side of the rapid mixing tank are provided with holes communicated with the distribution tank; the bottom surface of the quick mixing pool is not lower than the bottom surface of the distribution pool; a quick mixing stirrer is arranged in the quick mixing tank;

an overflow water distribution pipe is arranged in the water distribution tank and corresponds to the opening of the quick mixing tank; the bottom surface of the distribution tank is higher than the bottom surface of the flocculation tank; the bottom of the distribution tank is provided with a communicating pipe which is communicated with the bottom of the first side surface of the flocculation tank downwards; an automatic control valve is arranged on the communicating pipe;

the first side surface of the flocculation tank is close to the distribution tank, and the bottom surface of the flocculation tank is lower than the bottom surface of the distribution tank; a flotation filter tank with common edges is symmetrically arranged on the fourth side surface of the flocculation tank opposite to the first side surface, the bottom of the fourth side surface is provided with an opening communicated with the flotation filter tank, and a flow stabilizing cylinder corresponding to the opening is arranged in the flocculation tank; the bottom of the flow stabilizing cylinder is opposite to the opening and is sealed at an angle of 45 degrees, the top of the flow stabilizing cylinder is open, and the surface of the open is lower than the working liquid level of the flocculation tank; a flocculation stirrer is arranged in the flocculation tank;

the first side surface of the flotation filter tank is adjacent to the fourth side surface of the flocculation tank, a fifth side surface which is shorter than the first side surface is arranged in the first side surface, and the second side surface and the third side surface are respectively vertically adjacent to the first side surface; the bottom of the fifth side surface is vertical to the inner bottom surface of the flotation filter tank, two ends of the fifth side surface are vertically connected with the second side surface and the third side surface, the flotation filter tank is divided into a front area and a rear area, and the front area and the rear area are communicated at the upper side of the fifth side surface; a scum groove is arranged on the outer edge of the upper end of the fourth side surface opposite to the first side surface, and a scum pool is arranged on the outer side of the second side surface or the third side surface in close proximity; the scum groove is communicated with the scum pool;

a dissolved air releaser is arranged at the bottom of the front region of the flotation filtering tank; the dissolved air releaser adopts an adjustable type and is provided with an extension bar; the dissolved air releaser is connected with a pressurized dissolved air device;

the rear area of the flotation filter tank is sequentially provided with a water distribution filter beam, a backwashing air distribution pipe, a filter plate, a filter material and a backwashing drainage tank from bottom to top; a water passing hole is reserved on the water distribution filter beam, and a backwashing gas distribution pipe is arranged in the water passing hole of the water distribution filter beam; the filter plate is fixed on the upper surface of the water distribution filter beam; the backwashing drainage tank is arranged below the water surface of the flotation filter tank and above the filter material; a shearing water spraying pipe and a rolling shaft slag scraper are arranged at the top of the flotation filtering tank corresponding to the rear area, and the rolling shaft slag scraper is arranged above the floating slag groove;

a water outlet pipe and a backwashing water inlet pipe which extend out of the tank body are arranged at the bottom of the fourth side of the flotation filtering tank, a water outlet control valve is arranged on the water outlet pipe, and a backwashing water inlet control valve is arranged on the backwashing water inlet pipe;

the scum pond is funnel type, and the bottom of funnel is provided with the dross delivery pipe.

2. The integrated air-floating filter tank device according to claim 1, wherein the overflow water distribution pipe is composed of a straight pipe, a 90-degree elbow, a bell mouth and an adjusting ring, the straight pipe is connected to an opening of the rapid mixing tank communicated with the water distribution tank, one end of the 90-degree elbow is connected with the straight pipe, the other end of the 90-degree elbow is vertically upward and is connected with the small mouth of the bell mouth, the bell mouth is vertically arranged, the small mouth is arranged at the lower part and the large mouth is arranged at the upper part, the large mouth edge is kept horizontal, and the adjusting ring is arranged at the upper part of the large mouth of the bell mouth.

3. The integrated air-floating filter tank device according to claim 1, wherein the fast mixing stirrer is arranged at the center of the fast mixing tank and adopts a paddle folding type or a propelling type; the flocculation stirrer is arranged in the center of the flocculation tank and adopts a folding paddle type or a propelling type.

4. The integrated air-flotation filter tank device according to claim 1, wherein two ends of the shear water spray pipe are arranged to straddle the upper tank wall of the first side surface and the fourth side surface of the flotation filter tank, a water spray pipe parallel to the second side surface and the fourth side surface is respectively arranged near the second side surface and the third side surface, and the water spray pipe is provided with a spray head every 500-1000 mm.

5. The integrated air-floating filter tank device according to claim 1, wherein the backwashing water draining tank is composed of two semicircular or rectangular tanks, one end of the backwashing water draining tank is closed, and the other end of the backwashing water draining tank extends out of the device; the part extending out of the device is provided with a water outlet.

6. The integrated air-floating filter tank device according to claim 1, wherein the filter plate is square, the side length is 500-1000 mm, and the thickness is 80-120 mm; the long-handle filter heads are uniformly distributed on the surface of each filter plate, and the number of the long-handle filter heads of each filter plate is 36-64.

7. The integrated air-floating filter tank device according to claim 6, wherein the filter plates are spliced by adopting prefabricated filter plates.

8. The integrated air-floating filter tank device according to claim 1, wherein the filter material is divided into an upper layer and a lower layer, the upper layer and the lower layer are uniformly laid right above the filter plate, the lower layer is laid with quartz sand, and the upper layer is laid with anthracite or activated carbon filter material.

9. The integrated air flotation filter tank device according to claim 1, wherein 25-40 mm of air outlet pipes are uniformly arranged vertically upward on the water distribution filter beams, and the distance between the air outlet pipes is 800-1500 mm.

10. The integrated air flotation filter tank device according to claim 1, wherein the water outlet pipe and the backwash water inlet pipe share a main pipe.

11. The integrated air-float filter tank device according to claim 1, wherein the main bodies of the fast mixing tank, the distributing tank, the flocculation tank, the flotation filter tank and the scum tank of the device are concrete and/or steel structures.