CN217230434U - Novel air floatation device - Google Patents

Abstract

The utility model relates to a sewage treatment technical field relates to a novel air supporting device particularly. The integrated cylindrical barrel structure is supported by a foundation, and the barrel comprises a rotational flow two-stage air flotation clarification area at the central part, a water collection and filtration device, a secondary drainage device, an air flotation main barrel slag discharge pipe and an air flotation slag scraping system. The utility model discloses a two sections air supporting cloth gas, two sections mud devices of arranging with set up the primary and secondary outlet, realize two kinds of clear water drainage modes, provide one kind can realize high-efficient separation fast, area is little, goes out water stable in quality of water and measures big novel air supporting device.

Description

Novel air floatation device

Technical Field

The utility model relates to an industrial wastewater treatment field relates to the machining mill particularly, the oily waste water in each industrial field and oil field and other waste water treatment's a novel air supporting device.

Background

With the continuous enhancement of the requirement of environmental protection and the improvement of the discharge and recycling standards of wastewater, the effective treatment and recycling of oil-containing wastewater becomes an indispensable production link in the current machining, various industrial fields and oil field production processes. The traditional sewage treatment technology mainly comprises gravity separation, filtration, adsorption, coarse granulation, coagulation, biological treatment and the like.

For the treatment of oil slick, greasy dirt and suspended impurities in water, besides the precipitation and clarification solid-liquid separation method, there is also the opposite floatation separation method, called air floatation method. It is characterized by that the air is introduced into the treated water, and formed into the form of fine bubbles, and separated out and formed into carrier, so that the granular greasy dirt, floating oil and flocculate in the water can be adhered on the bubble carrier, and then floated on the water surface to form bubble scum, and separated out from the water. However, the traditional air-floatation sewage treatment methods and devices have the disadvantages of low treatment efficiency, long separation time, large occupied area, secondary pollution introduction and the like,

the patent No. 202220034324.7 of the applicant, named as an air floatation device, provides an integrated cylindrical barrel structure supported by a foundation, the central structure of the barrel is a rotational flow air floatation clarification area, and is divided into three reaction chambers which are communicated with each other and provided with two sections of air floatation and air distribution devices; the three sections of sludge discharging devices are arranged in the cylinder body, so that suspended matters and oils in the discharged water are discharged up to the standard, and the air floatation device is quick in efficient separation, small in occupied area and environment-friendly. In the actual use process, the device can not treat waste water more pointedly, quickly and effectively according to the water quality and the continuous change of the water quantity of inlet water. Therefore, the development of the air floatation sewage treatment equipment which is suitable for various inflow water qualities and can more efficiently and quickly treat the inflow water has very important practical significance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior air floatation device, and provides the air floatation device which can realize high-efficiency separation, small floor area and stable water quality of outlet water.

The utility model relates to a novel air floatation device, which is an integrated cylindrical barrel structure, wherein the barrel comprises a rotational flow two-stage air floatation clarification area at the central part, a water collection and filtration device, a secondary drainage device, an air floatation main barrel slag discharge pipe and an air floatation slag scraping system;

the cyclone two-stage air flotation clarification area is divided into three mutually communicated reaction chambers, namely a straight cylinder reaction chamber I, an inverted cone reaction chamber and a straight cylinder reaction chamber II from bottom to top, wherein air distribution devices are arranged in the straight cylinder reaction chamber I and the straight cylinder reaction chamber II for two-stage air flotation and air distribution; the first straight barrel reaction chamber is arranged at the bottom of the barrel structure and is connected with a water inlet pipe; the cross sectional area of the inverted cone reaction chamber is gradually increased from bottom to top, and the cross sectional area of the joint of the inverted cone reaction chamber and the straight cylinder reaction chamber II is maximized; the area of the cross section of the second straight-barrel reaction chamber is the maximum cross section of the barrel structure;

the water collecting and filtering device comprises a water collecting device arranged above the deslagging pipe of the air floatation main cylinder and a filtering area annularly arranged at the bottom of the cylinder; the water collecting device is connected with the filtering area through a vertical shaft arranged on the outer wall of the cylinder body; the filtering area comprises a filtering pool provided with a filtering material and a clear water tank positioned above the filtering pool; the filter chamber is connected with the water collecting device through a vertical shaft, and water collected by the water collecting device is guided into the filter chamber through the vertical shaft for independent filtration; the clean water tank is connected with the bottom of the filter tank through a clean water tank vertical shaft arranged on the side surface, water filtered by a filter material in the filter tank is collected at the bottom of the filter tank, enters the clean water tank through the clean water tank vertical shaft, and is discharged through a clean water tank water outlet pipe after reaching the standard through detection, so that the clean water tank is a main water outlet;

the secondary drainage device comprises a central clear water collecting barrel, a clear water radiation pipe and a clear water chamber; the central clear water collecting barrel is arranged in the centers of the inverted cone reaction chamber and the straight barrel reaction chamber II; the clean water chamber is annularly arranged at the bottom of the barrel, is positioned between the outer side walls of the first straight barrel reaction chamber, the inverted cone reaction chamber and the filtering area, is communicated with the central clean water collecting barrel through a clean water radiation pipe, and is provided with a water outlet at the side edge of the top of the clean water chamber to discharge clean water in the clean water chamber, namely a secondary water outlet;

the air floatation main cylinder slag discharge pipe is arranged at the upper part of the rotational flow two-stage air floatation clarification area, and is specifically positioned above the straight cylinder reaction chamber II;

the air floatation slag scraping system is arranged at the top of the cylinder body.

Furthermore, the water inlet pipe is tangentially connected with the bottom of a straight barrel reaction chamber in the rotational flow two-stage air flotation clarification area.

Further, a pipeline mixer is further arranged on the pipe body of the water inlet pipe before the water inlet pipe enters the cylinder structure and is used for throwing coagulant.

Further, the air distribution device of the first straight cylinder reaction chamber is a microporous aerator.

Further, the gas distribution device of the second straight-barrel reaction chamber is a dissolved gas releaser.

Furthermore, the number of the air-floatation main cylinder slag discharge pipes is set to be 1-3 according to the indexes of water inflow suspended matters; small holes are uniformly formed in the air floatation main cylinder body slag discharge pipe to serve as collecting holes for collecting oil sludge mixture with the density close to that of water.

Further, the water collecting device comprises a water collecting pipe and an annular water collecting groove; the pipe body of the water collecting pipe is provided with a water collecting hole, the center of the water collecting pipe is fixed on the central upright post, two ends of the water collecting pipe are connected with an annular water collecting tank, and clear water treated by the slag discharging pipe of the rear air floatation main cylinder body is collected in the annular water collecting tank through the water collecting hole; the number of the water collecting pipes is set to be 1-4 according to indexes such as water inflow and the like.

Further, the air floatation slag scraping system comprises an air floatation slag scraping machine upright post, a slag collecting groove, a rotating shaft mechanism base, a rotating inner wall mechanism, a traveling motor, a connecting frame, a slag scraping plate and a rotating shaft mechanism; the upright post of the air floatation slag scraper is fixedly arranged at the center of the whole barrel, the rotating shaft mechanism base is fixedly arranged right above the upright post of the air floatation slag scraper, the rotating shaft mechanism and the rotating inner wall mechanism are sleeved at the upper end of the rotating shaft mechanism base, the rotating shaft mechanism is powered by a traveling motor and is used for rotating, and the connecting frame is arranged on the side surface of the rotating inner wall mechanism and is arranged along the direction of the radius of a circle; a slag scraping plate is arranged at the bottom of the connecting frame; when the floating slag collecting device rotates, the inner wall rotating mechanism drives the connecting frame and the slag scraping plate to rotate around the vertical column of the air floatation slag scraping machine, so that floating slag at the top of the liquid level is scraped into the slag collecting groove and is discharged from the slag collecting groove.

Furthermore, the filter material is a three-layer filter material, and the three-layer heavy filter material sequentially comprises 0.6-1.2mm of anthracite, 1-2mm of quartz sand and 30-50 mm of cobble from top to bottom.

Furthermore, a filter cover plate is arranged at the top of the filter and is obliquely arranged, so that water in the vertical shaft can better enter the filter.

Further, the top of clear water tank is provided with clear water tank apron, the top side of clear water tank is equipped with the breather pipe, clear water tank apron sets up for the slope, has raised the lateral wall length in the clear water tank outside, gives and sets up the breather pipe reservation position.

Furthermore, a back flush siphon system is also arranged at the top of the filter tank; the back-flushing siphon system comprises a siphon back-flushing main pipe and a back-flushing water distribution plate, wherein one end of the siphon back-flushing main pipe is connected with the back-flushing water distribution plate, and the other end of the siphon back-flushing main pipe is connected with the annular water-sealing ditch; and a siphon backwashing manual valve and a siphon backwashing electric valve are arranged on the siphon backwashing main pipe. During backwashing, clear water in a clear water tank enters the bottom of the filter tank through a clear water tank vertical shaft, the clear water is flushed upwards from the bottom of the filter tank to backwash filter materials in the filter tank, backwash water enters a siphon backwash header pipe through a backwash water distribution plate at the top of the filter tank, a siphon backwash manual valve or siphon backwash electric valve is opened, and the backwash water can be discharged into an annular water seal ditch through the siphon backwash header pipe.

Furthermore, a filter head plate and a filter emptying pipe are arranged at the bottom of the filter, and a filter emptying manual valve is arranged on the filter emptying pipe.

Furthermore, a filter chamber partition plate can be arranged in the filter chamber annularly arranged at the bottom of the cylinder body to separate the filter chamber, so that the filter chamber is convenient to maintain and filter materials are convenient to replace; according to the requirement, two left and right filter tank partition plates can be arranged to divide the filter tank equally by 2, or four filter tank partition plates can be arranged to divide the filter tank equally by 4.

Further, the bottom of the clear water chamber is provided with a clear water chamber emptying pipe for emptying the clear water chamber.

The utility model has the advantages that: the coagulation, the rotational flow reaction and the air flotation solid-liquid separation are integrated into one device; two sections of air floatation and air distribution and two sections of sludge discharge devices are arranged, so that suspended matters and oils in the discharged water are discharged after reaching the standard; creatively aims at different water qualities of inlet water, and two clear water drainage modes are realized by designing a primary and secondary drainage port; the water collecting and filtering device is arranged, namely the water collecting device is arranged above the air floatation main cylinder slag discharging pipe, the annular filtering area is arranged at the bottom of the cylindrical cylinder, sewage collected by the water collecting device is treated independently, and the sewage is treated quickly and effectively by matching with the drainage of the clean water chamber in the secondary drainage device, so that the quality of the discharged water is stable and the water yield is ensured. The whole structure of the equipment is compact, the space arrangement is reasonable, thereby greatly reducing the volume of the equipment, occupying small area, saving investment, reducing maintenance amount and shortening construction period.

Description of the drawings:

FIG. 1 is a schematic structural view of a novel air flotation device of the present invention;

in the figure: 1. a water inlet pipe, 2, a pipeline mixer, 3, a straight barrel reaction chamber I, 4, a micropore aerator, 5, an inverted cone reaction chamber, 6, a straight barrel reaction chamber II, 7, a dissolved air releaser, 8, an air flotation main barrel slag discharge pipe, 9, a central clear water collecting barrel, 10, a clear water radiation pipe, 11, a clear water chamber, 12, a water outlet, 13, a clear water chamber vent pipe, 14, an air flotation slag scraper upright post, 15, a slag collecting groove, 16, a rotating shaft mechanism base, 17, a rotating inner wall mechanism, 18, a walking motor, 19, a connecting frame, 20, a slag scraping plate, 21, a rotating shaft mechanism, 22, a water collecting pipe, 23, an annular water collecting groove, 24, a vertical shaft, 25, a filter tank, 26, a filter tank cover plate, 27, a coal bed, 28, a quartz sand layer, 29, a river layer, 30, a filter head plate, 31, an air release pipe, a filter tank, 32, a manual valve for pebble release, 33, a clear water tank cover plate, 34 and a clear water tank cover plate, 35. clean water tank vertical shaft, 36, clean water tank inlet hole, 37, clean water tank outlet pipe, 38, siphon backwash general pipe, 39, backwash water distribution plate, 40, siphon backwash manual valve, 41, siphon backwash electric valve, 42, annular water seal ditch, 43, vent pipe, 44 and bottom plate.

Detailed Description

The utility model discloses an air supporting device, technical personnel in the field can reference the utility model discloses the content, suitably improves technological parameter. The techniques of the present invention are specifically described below by way of embodiments, which are only helpful in understanding the present invention and should not be construed as limiting the present invention.

The utility model discloses an air supporting device, for the integral type cylinder barrel structure who is supported by the ground basis, will mix the reaction, the whirl reaction, several kinds of water treatment processes organic such as air supporting solid-liquid separation combine the novel air supporting device in integral type equipment.

The utility model relates to an integral type cylinder barrel structure, the barrel includes whirl two-stage air supporting clarification district, water-collecting filter equipment, inferior drainage device, air supporting main barrel slag pipe and the sediment system is scraped to atmospheric flotation.

The central part of the cylinder is a rotational flow two-stage air flotation clarification area which is divided into three mutually communicated reaction chambers, namely a straight cylinder reaction chamber I3, an inverted cone reaction chamber 5 and a straight cylinder reaction chamber II 6 from bottom to top; the straight barrel reaction chamber I3 is arranged at the bottom of the barrel structure and is connected with the water inlet pipe 1; and an air distribution device is arranged in the first straight barrel reaction chamber 3 for air floatation and air distribution.

Wherein, the gas distribution device of the first straight barrel reaction chamber 3 adopts a microporous aerator 4.

Wherein, the bottom of straight barrel reaction chamber 3 is connected to inlet tube 1 tangential, still be equipped with pipe-line mixer 2 on the body of inlet tube 1 before getting into the tubular structure, be equipped with the medicine pipeline on the pipe-line mixer 2 for put in the coagulant.

The cross-sectional area of the inverted cone reaction chamber 5 is gradually increased from bottom to top, and the cross-sectional area at the joint of the inverted cone reaction chamber 5 and the straight cylinder reaction chamber II 6 is the largest.

The area of the cross section of the second straight-barrel reaction chamber 6 is the largest part of the cross section of the barrel structure. And an air distribution device is also arranged in the straight cylinder reaction chamber II 6 for air floatation and air distribution.

Wherein, the gas distribution device of the second straight-barrel reaction chamber is a dissolved gas releaser 7.

The water collecting and filtering device comprises a water collecting device arranged above the air floatation main cylinder slag discharge pipe 8 and a filtering area annularly arranged at the bottom of the cylinder;

wherein the water collecting device comprises a water collecting pipe 22 and an annular water collecting tank 23; a water collecting hole is formed in the body of the water collecting pipe 22, the center of the water collecting pipe 22 is fixed to the central upright column, two ends of the water collecting pipe 22 are connected with the annular water collecting groove 23, and clear water treated by the rear air floatation main cylinder slag discharging pipe 8 is collected in the annular water collecting groove 23 through the water collecting hole through the water collecting pipe 22; the number of the water collecting pipes 22 is set to be 1-4 according to indexes such as water inflow and the like.

The filtering area comprises a filtering pool 25 provided with filtering materials and a clean water tank 33 positioned above the filtering pool; the filter 25 is connected with a water collecting device through a vertical shaft 24, and water collected by the water collecting device is guided into the filter 25 through the vertical shaft 24 for independent filtration; the clean water tank 33 is connected with the bottom of the filter 25 through a clean water tank vertical shaft 35 arranged on the side surface; the water filtered by the filter material in the filter 25 is collected at the bottom of the filter 25, enters the clear water tank 33 through the clear water tank vertical shaft 35, and is discharged through the clear water tank water outlet pipe 37 after the clear water in the clear water tank 33 reaches the standard through detection, wherein the clear water tank water outlet pipe 37 is a main water outlet;

wherein the filter material is three layers of heavy filter materials, namely 0.6-1.2mm anthracite 27, 1-2mm quartz sand 28 and 30-50 mm cobble 29 from top to bottom.

Wherein, the top of the filter 25 is provided with a filter cover plate 26 which is arranged obliquely, so that water in the vertical shaft can better enter the filter.

Wherein, clear water tank 33's top is provided with clear water tank apron 34, clear water tank 33's top side is equipped with breather pipe 43, clear water tank apron is the slope setting, has raised the lateral wall length in the clear water tank 33 outside, gives and sets up breather pipe 43 reservation position.

The bottom of the filter 25 is provided with a filter head plate 30 and a filter emptying pipe 31, the filter head plate 30 is provided with a filter head, and the filter emptying pipe 31 is provided with a filter emptying manual valve 32.

Wherein, a filter chamber clapboard can be vertically arranged in the filter chamber 25 annularly arranged at the bottom of the cylinder body to separate the filter chamber 25, which is convenient for the maintenance of the filter chamber 25 and the replacement of filter materials; according to the requirement, two left and right filter tank partition plates can be arranged to divide the filter tank equally by 2, or four filter tank partition plates can be arranged to divide the filter tank equally by 4.

The secondary drainage device comprises a central clear water collecting barrel 9, a clear water radiation pipe 10 and a clear water chamber 11 annularly arranged at the bottom of the barrel; the central clear water collecting barrel 9 is arranged at the centers of the inverted cone reaction chamber 5 and the straight barrel reaction chamber II 6; the central clear water collecting cylinder 9 is a closed cylinder, the upper part of a water collecting cylinder body of the central clear water collecting cylinder 9 is provided with a water collecting hole, and clear water after two-stage air floatation is collected; the lower end of the central clear water collecting barrel 9 is welded with a clear water radiation pipe 10 which is communicated with a clear water chamber 11 through a plurality of clear water radiation pipes 10; the clear water room is specifically located the middle of straight barrel reacting chamber 3, the lateral wall of back taper reacting chamber 5 and filtering area, the top side of clear water room 11 is equipped with delivery port 12 for the clear water of discharge clear water room 11, delivery port 12 is the time outlet.

Wherein, 3-7 clear water radiant tubes 10 can be arranged.

The air-flotation main cylinder slag discharge pipe 8 is arranged at the upper part of the rotational flow two-stage air-flotation clarification area, is specifically positioned above the straight cylinder reaction chamber II 6 and is used as a first-section sludge discharge device.

Wherein, the air-float main cylinder body slag discharge pipe 8 is provided with 1-3 air-float main cylinder body slag discharge pipes according to the index of water inlet suspended matters; small holes are uniformly formed in the air floatation main cylinder body slag discharge pipe 8 to serve as collecting holes for collecting oil sludge mixture with the density close to that of water.

The air floatation slag scraping system is arranged at the top of the cylinder body and is used as a second section mud discharging device.

The air floatation slag scraping system comprises an air floatation slag scraping machine upright post 14, a slag collecting groove 15, a rotating shaft mechanism base 16, a rotating inner wall mechanism 17, a walking motor 18, a connecting frame 19, a slag scraping plate 20 and a rotating shaft mechanism 21; the upright post 14 of the air floatation slag scraping machine is fixedly arranged at the center of the whole cylinder body, penetrates through the central clear water collecting cylinder 9, and one end of the bottom of the upright post is welded at the center of the bottom of the cylinder body and is used for bearing the whole air floatation slag scraping system; pivot mechanism base 16 welds and scrapes sediment machine stand 14 directly over in the air supporting, pivot mechanism 21 cup joints in pivot mechanism base 16 upper end with rotatory inner wall mechanism 17, walking motor 18 sets up in the top of rotatory inner wall mechanism 17 for it is rotatory to drive pivot mechanism, and rotatory inner wall mechanism 17 and link 19 and pivot mechanism 21 welding are in the same place, and walking motor 18 moves in the time, and drive pivot mechanism 21 is rotatory, drives rotatory inner wall mechanism 17 and link 19 of welding together and rotate together, and link 19 bottoms are provided with scum board 20, and link 19 drives scum board 20 when rotatory and carries out the rotation and scrape the sediment, scrapes the dross at liquid level top into in album sediment groove 15, by album sediment groove 15 discharges.

The foundation base is used for bearing the load of the whole device.

The process flow of the utility model is as follows: sewage enters a cylinder structure from a water inlet pipe 1, is fully mixed with coagulant polyaluminium chloride and polyacrylamide in a pipeline mixer 2, then tangentially enters a straight cylinder reaction chamber I3 to generate high-strength rotational flow, the sewage rotates upwards to sequentially pass through the straight cylinder reaction chamber I3, an inverted cone reaction chamber 5 and a straight cylinder reaction chamber II 6, and the part continuously rises in a rotational flow mode to form a rotational flow air flotation clarification area; the cross section area of the first straight barrel reaction chamber 3 is the smallest, the cross section area of the generated high-strength rotational flow centripetal force field is gradually increased, the cross section area is gradually increased from the high-strength rotational flow centripetal force field to the low-strength rotational flow centripetal force field, when sewage rises to the second straight barrel reaction chamber 6, the cross section area is the largest, the low-strength rotational flow centripetal force field is formed, the flotation separation can be performed in the second straight barrel reaction chamber 6 of the sewage, the low-strength hydraulic rotational flow centripetal separation can be used, the two types of separation supplement each other, the separation effect is improved, and the separation time is shortened.

A micropore aerator 4 is arranged in the straight barrel reaction chamber I3, and a large amount of fine bubbles are injected into the mixed liquid which continuously rises in a swirling manner in the straight barrel reaction chamber I3 through the micropore aerator 4 by using an air compressor for uniform aeration, so that flocs in the sewage slightly float upwards; the sewage gradually rises along with the rotational flow reaction, when the sewage passes through the inverted cone reaction chamber 5, the rotational flow speed is gradually slowed along with the increase of the cross-sectional area of the inverted cone, flocs grow gradually, the dissolved air releaser 7 is arranged at the bottom of the straight cylinder reaction chamber II 6, after the dissolved air is fully released by the dissolved air releaser 7, the flocs float more obviously, the flocs with bubbles continuously rise along with the bubbles, and are concentrated and extruded on the upper liquid level to form a relatively compact sludge suspension layer which rises to the top of the cylinder body, and the sludge suspension layer is collected and discharged out of the cylinder body through the air flotation residue scraping system; the dispersed flocs (oil sludge mixture with the density as much as that of water) at the lower part of the sludge suspension layer are collected through collecting holes uniformly arranged on a deslagging pipe 8 of the air floatation main cylinder body and discharged out of the cylinder body; supernatant containing a small amount of flocs is collected through holes in a water collecting pipe 22 arranged between a slag discharging pipe 8 and an air floatation slag scraping system, and then is converged into an annular water collecting tank 23, and enters a filter 25 through a vertical shaft 24 for filtering, and filtered clear water enters a clear water tank 33 and is discharged through a clear water tank water outlet pipe 37, wherein the clear water tank is a main water outlet.

The central clear water collecting barrel 9 is arranged in the center of the rotational flow two-stage air flotation clarification area, the central clear water collecting barrel 9 is a closed barrel, a water collecting hole is formed in the upper portion of the barrel, clear water subjected to two-stage air flotation is collected through the central clear water collecting barrel 9, enters the clear water chamber 11 through the clear water radiation pipe 10, and is discharged through a water outlet 12 formed in the side edge of the top of the clear water chamber 11, and the water outlet 12 is a secondary water outlet.

The primary and secondary water outlets are arranged for different water inlets and air floatation enhancement.

If the sludge suspension layer is not thick, the quality of the inlet water is better or the air floatation treatment effect is good, the discharge of clear water can be accelerated by opening the water outlet 12, and the purpose of increasing the treated water quantity is achieved. At the moment, clear water is discharged simultaneously through two water outlets of the water outlet 12 and the clear water tank water outlet pipe 37;

if the sludge suspension layer is thick, it is said that the quality of the inlet water is bad or the air floatation treatment effect is not good, clear water can be forced to enter from the water collecting pipe 22 only by closing the water outlet 12, at this moment, the water in the clear water chamber 11 is in a static state, the rising flow rate of sewage is larger than that when the water outlet 12 is opened, at this moment, the rising speed can be accelerated by increasing the dissolved air amount of the air floatation releaser and the sewage, sludge is further compacted, the purpose of efficiently treating the sewage is achieved, and at this moment, the clear water is only discharged from the water outlet pipe 37 of the clear water tank.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any form, and any simple modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention.

Claims (10)

1. A novel air floatation device is characterized in that the novel air floatation device is of an integrated cylindrical barrel structure, and the barrel comprises a rotational flow two-stage air floatation clarification area at the central part, a water collecting and filtering device, a secondary drainage device, an air floatation main barrel slag discharge pipe (8) and an air floatation slag scraping system;

the cyclone two-stage air flotation clarification zone is divided into three mutually communicated reaction chambers, namely a straight cylinder reaction chamber I (3), an inverted cone reaction chamber (5) and a straight cylinder reaction chamber II (6) from bottom to top, wherein air distribution devices are arranged in the straight cylinder reaction chamber I (3) and the straight cylinder reaction chamber II (6); the straight barrel reaction chamber I (3) is arranged at the bottom of the barrel structure and is connected with the water inlet pipe (1); the cross section area of the inverted cone reaction chamber (5) is gradually increased from bottom to top, and the cross section area of the joint of the inverted cone reaction chamber and the straight cylinder reaction chamber II (6) is maximized;

the water collecting and filtering device comprises a water collecting device arranged above the deslagging pipe of the air floatation main cylinder and a filtering area annularly arranged at the bottom of the cylinder; the water collecting device is connected with the filtering area through a vertical shaft (24) arranged on the outer wall of the cylinder body; the filtering area comprises a filtering pool (25) provided with filtering materials and a clear water tank (33) positioned above the filtering pool; the clean water tank (33) is connected with the bottom of the filter tank (25) through a clean water tank vertical shaft (35) arranged on the side surface, and after the clean water in the clean water tank reaches the standard, the clean water is discharged through a clean water tank water outlet pipe (37) to serve as a main water outlet;

the secondary drainage device comprises a central clear water collecting cylinder (9), a clear water radiation pipe (10) and a clear water chamber (11); the central clear water collecting barrel (9) is arranged at the centers of the inverted cone reaction chamber (5) and the straight barrel reaction chamber II (6); the clear water chamber (11) is annularly arranged at the bottom of the barrel, is positioned between the outer side walls of the straight barrel reaction chamber I (3) and the inverted cone reaction chamber (5) and the filtering area, is communicated with the central clear water collecting barrel (9) through a clear water radiation pipe (10), and is provided with a water outlet (12) at the side edge of the top of the clear water chamber (11) for discharging clear water in the clear water chamber (11) as a secondary water outlet;

the air-flotation main cylinder slag discharge pipe (8) is arranged at the upper part of the rotational flow two-stage air-flotation clarification area and is specifically positioned above the straight cylinder reaction chamber II (6); the air floatation slag scraping system is arranged at the top of the cylinder body.

2. The novel air-flotation device as claimed in claim 1, wherein the water inlet pipe (1) is tangentially connected to the bottom of the first straight-barrel reaction chamber (3) in the cyclone two-stage air-flotation clarification zone.

3. The novel air flotation device according to claim 1, characterized in that a pipeline mixer (2) is further arranged on the water inlet pipe (1).

4. The novel air-flotation device as claimed in claim 1, wherein the air distribution device of the first straight-barrel reaction chamber (3) is a microporous aerator (4); and the gas distribution device of the second straight-barrel reaction chamber (6) is a dissolved gas releaser (7).

5. The novel air flotation device as claimed in claim 1, wherein the number of the air flotation main cylinder slag discharge pipes (8) is 1-3; small holes are uniformly formed in the air floatation main cylinder slag discharge pipe (8) to serve as collecting holes.

6. The new air flotation device according to claim 1, characterized in that the water collection device comprises a water collection pipe (22) and an annular water collection tank (23); the pipe body of the water collecting pipe (22) is provided with water collecting holes, two ends of the water collecting pipe (22) are connected with annular water collecting grooves (23), and the number of the water collecting pipe (22) is 1-4.

7. The novel air flotation device according to claim 1, wherein the air flotation slag scraping system comprises an air flotation slag scraper upright post (14), a slag collecting groove (15), a rotating shaft mechanism base (16), a rotating inner wall mechanism (17), a traveling motor (18), a connecting frame (19), a slag scraping plate (20) and a rotating shaft mechanism (21); sediment machine stand (14) is scraped in the air supporting is fixed to be set up at the center of whole barrel, sediment machine stand (14) top is scraped in the air supporting in fixed the setting of pivot mechanism base (16), pivot mechanism (21) and rotatory inner wall mechanism (17) cup joint in the upper end of pivot mechanism base (16), pivot mechanism (21) are by walking motor (18) provide power, drive rotatory inner wall mechanism (17) and link (19) and rotate together, link (19) set up in the side of rotatory inner wall mechanism (17), link (19) bottom is provided with scrapes slag plate (20).

8. The novel air flotation device as claimed in claim 1, wherein a filter cover plate (26) is arranged at the top of the filter (25); the top of the clear water tank (33) is also provided with a clear water tank cover plate (34), and the top side of the clear water tank (33) is provided with a vent pipe (43).

9. The novel air flotation device as claimed in claim 1, wherein a back-flushing siphon system is further arranged at the top of the filter tank (25); the backwashing siphon system comprises a siphon backwashing main pipe (38) and a backwashing water distribution plate (39), wherein one end of the siphon backwashing main pipe (38) is connected with the backwashing water distribution plate (39), and the other end is connected with an annular water seal ditch (42); the siphon back washing main pipe (38) is provided with a siphon back washing manual valve (40) and a siphon back washing electric valve (41).

10. The novel air flotation device as claimed in claim 1, wherein a filter head plate (30) and a filter emptying pipe (31) are arranged at the bottom of the filter tank (25), and a filter emptying manual valve (32) is arranged on the filter emptying pipe (31).

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