CN210393795U

CN210393795U - Horizontal flow type dissolved air flotation machine

Info

Publication number: CN210393795U
Application number: CN201921159032.0U
Authority: CN
Inventors: 李志松; 卢敏生; 葛树鹏
Original assignee: Shandong Leading Environmental Protection Technology Co Ltd
Current assignee: Shandong Leading Environmental Protection Technology Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-04-24
Anticipated expiration: 2029-07-22

Abstract

The utility model relates to the technical field of auxiliary devices for wastewater treatment, in particular to a horizontal flow type dissolved air flotation machine; the device comprises an air flotation tank, an air exhaust device, an air inlet pipe and an exhaust pipe, wherein the top of the air flotation tank is communicated with a liquid inlet, the upper parts of the left side and the right side of the air flotation tank are communicated with a slag discharge port, the lower part of the left side of the air flotation tank is communicated with a liquid discharge pipe, and the liquid discharge pipe is provided with a liquid discharge valve; still include two sets of sliders, two sets of arch crossbeams and two sets of screw thread post, the left side and the right side of two sets of arch crossbeams transversely all are provided with first logical groove, and all rotate and be fixed with first ball group in four first logical inslots of groups, the fixed cover of two sets of screw thread post left and right sides is all equipped with the position circle, two sets of arch crossbeam tops transversely all are provided with the spout, and all be fixed with the sliding block in two sets of spout departments of equal sliding, two sets of slider bottom left and right sides all are connected with the clamp splice, and four clamp splice inboards all are connected with and press from both sides the dress spring, four clamp splice inboards.

Description

Horizontal flow type dissolved air flotation machine

Technical Field

The utility model relates to a technical field of waste water treatment auxiliary device especially relates to a advection formula dissolves gas air supporting machine.

Background

As is well known, the advection type dissolved air flotation machine is an accessory device used in the industrial wastewater treatment process for separating impurities such as solid suspended matters, grease, cementing matters and the like in the industrial wastewater from water through micro-bubbles, and is widely used in the field of industrial wastewater treatment; the existing advection type dissolved air flotation machine comprises an air flotation tank, an air exhaust device, an air inlet pipe and an air exhaust pipe, wherein an air flotation cavity is arranged in the air flotation tank, a liquid inlet is communicated and arranged at the top of the air flotation tank, slag discharge ports are communicated and arranged above the left side and the right side of the air flotation tank, a liquid discharge pipe is communicated and arranged below the left side of the air flotation tank, a liquid discharge valve is arranged on the liquid discharge pipe, the air exhaust device is arranged at the bottom in the air flotation tank, the output end of the air inlet pipe and the input end of the air exhaust pipe are respectively communicated with the right side wall and the top of the air exhaust device in a sealing manner, the input end of the air inlet pipe; when the existing advection type dissolved air flotation machine is used, industrial wastewater to be treated is poured into an air flotation tank through a liquid inlet, air is introduced from an air inlet pipe through an air exhaust device, micro bubbles are introduced into the air flotation tank through an air exhaust pipe group, the micro bubbles bring solid suspended matter impurities in the industrial wastewater to the water surface in the rising process, operators scrape the suspended matter until the suspended matter is no longer generated, the cleaned water is discharged from a liquid exhaust pipe, the air exhaust device is a common electric device in the market, the air exhaust device can be used only by being electrically connected according to a service instruction purchased back together when bought back for use, and connecting wires can be used as long as reasonable wiring of work can be carried out, so the details are not repeated; the existing advection type dissolved air flotation machine is found to have low removal efficiency and poor practicability because suspended matters need to be skimmed manually by operators.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a semi-automatization is skimmed off in its suspended solid realization, improves and gets rid of efficiency, strengthens the advection formula dissolved air flotation machine of practicality.

The utility model discloses a advection type dissolved air flotation machine, including air supporting box, air exhaust device, intake pipe and blast pipe, be provided with the air supporting chamber in the air supporting box, and be provided with the inlet at air supporting box top intercommunication, air supporting box left and right sides top all communicates and is provided with the slag discharging hole, air supporting box left side below intercommunication is provided with the fluid-discharge tube, and be provided with the flowing back valve on the fluid-discharge tube, air exhaust device installs the bottom in the air supporting box, intake pipe output and blast pipe input communicate with air exhaust device right side wall and top seal respectively, the intake pipe input passes air supporting box inner right side wall and stretches out the air supporting box outside, intake pipe and air supporting box mechanical seal; the two groups of slide blocks are respectively arranged at the left side and the right side of the two groups of arched crossbeams, the left side and the right side of the two groups of arched crossbeams are respectively provided with a first through groove, the first ball group is rotatably fixed in the four groups of first through grooves, the left end and the right end of the two groups of threaded columns respectively penetrate through the four groups of first ball groups and respectively extend out of the two groups of arched crossbeams, the left side and the right side of the two groups of threaded columns are respectively and fixedly sleeved with a positioning ring, the four groups of positioning rings are respectively contacted with the left side wall and the right side wall of the two groups of arched crossbeams, the top ends of the two groups of arched crossbeams are respectively provided with a sliding groove, sliding blocks are respectively fixed at the two groups of sliding grooves in a sliding way, the two groups of sliding blocks are respectively arranged at the top ends of the two groups, the inner sides of the four groups of clamping blocks are connected with clamping plates, and the scraping device further comprises clamping sheets and scraping sheets, wherein the scraping sheets are arranged at the bottom ends of the clamping sheets, and the front sides and the rear sides of the clamping sheets are respectively clamped between the two groups of clamping plates positioned on the front side and the two groups of clamping plates positioned on the rear side.

The utility model discloses a advection formula dissolves gas air supporting machine, still include and adsorb the box, it installs in the flotation tank front side to adsorb the box, it adsorbs the chamber to adsorb the box inside to be provided with, it is provided with the change mouth to adsorb box top intercommunication, and be provided with the apron in change mouth department, it has adsorbed carbon to adsorb intracavity inside to place, the sealed intercommunication in flotation tank front side top has the inlet pipe, the inlet pipe output passes worker and adsorbs box back lateral wall and stretch into to adsorbing box inside below, inlet pipe and absorption box mechanical seal, it has the blow-off pipe to adsorb the sealed intercommunication in box left side wall top, sealed intercommunication has the exhaust fan on the blow-off pipe, the exhaust fan is installed and is adsorbed box left side wall top.

The utility model discloses a advection formula dissolves gas air supporting machine still includes fixed axle, handle, rotation post and stirring rod group, and inside the stirring rod group lies in the absorption box, the handle is rotatable to be fixed on the fixed axle top, rotates the top and the fixed axle connection of post, and stirring rod group installs on rotating the post.

The utility model discloses a advection type dissolves gas air supporting machine, apron top intercommunication are provided with the second through groove to in the rotatable second through groove inside wall that is fixed with second ball group, the bottom of rotation post is passed second ball group and is stretched into to adsorbing the box inside, and the fixed cover in the rotation post outside is equipped with two sets of spacing rings, two sets of spacing rings respectively with apron top and bottom contact.

The utility model discloses a advection type dissolves gas air supporting machine still includes brace table, supporting shoe, motor, transmission shaft, first gear and two sets of second gear, and the brace table is installed in air supporting box right side top, and the supporting shoe is installed on the brace table top, and the motor is installed on the supporting shoe top, and both ends are connected with first gear right side center and motor left side output respectively about the transmission shaft, and two sets of second gears are installed respectively at two sets of screw thread post right-hand members, and two sets of second gears all with first gear engagement.

The utility model discloses a advection formula dissolves air supporting machine, air supporting case front side intercommunication is provided with the viewing aperture to there is transparent baffle in viewing aperture department sealing connection.

The utility model discloses a horizontal flow type dissolves air supporting machine, air supporting bottom is provided with the slipmat.

The utility model discloses a advection formula dissolves gas air supporting machine, the blast pipe sets up to the multiunit.

Compared with the prior art, the beneficial effects of the utility model are that: can rotate two sets of screw thread posts 9 through the synchronization, drive two sets of sliders 7 and carry out synchronous lateral shifting, again because the restriction of receiving two sets of horizontal spouts, make only lateral shifting of two sets of sliders 7 and do not rotate, and then drive two sets of doctor-bars 15 and carry out lateral shifting, doctor-bar 15 stretches into to 1 inside of air supporting box, make its suspended solid realize semi-automatization and skim off, the efficiency is got rid of in the improvement, the enhanced practicability, first ball group assists screw thread post 9 to rotate more in the same direction as smooth, position circle 10 carries out horizontal spacing to screw thread post 9, the design that splint 13 pressed from both sides the dress makes things convenient for 15 pull dismouting of doctor-bar, so that later stage.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the engagement of a first gear and two sets of second gears;

FIG. 3 is an enlarged partial view of portion A of FIG. 1;

FIG. 4 is an enlarged view of part B of FIG. 1;

in the drawings, the reference numbers: 1. an air flotation tank; 2. an air extraction device; 3. an air inlet pipe; 4. an exhaust pipe; 5. a slag discharge port; 6. a liquid discharge pipe; 7. a slider; 8. an arched beam; 9. a threaded post; 10. positioning rings; 11. a slider; 12. a clamping block; 13. a splint; 14. clamping the sheet; 15. scraping a blade; 16. an adsorption box; 17. a cover plate; 18. a feed pipe; 19. a discharge pipe; 20. an exhaust fan; 21. a fixed shaft; 22. a handle; 23. rotating the column; 24. a stirring rod set; 25. a support table; 26. a support block; 27. a motor; 28. a drive shaft; 29. a first gear; 30. a second gear; 31. a transparent baffle; 32. a non-slip mat.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 4, the horizontal flow type dissolved air flotation machine of the present invention comprises an air flotation tank 1, an air extractor 2, an air inlet pipe 3 and an air exhaust pipe 4, wherein an air flotation cavity is arranged in the air flotation tank 1, a liquid inlet is communicated and arranged at the top of the air flotation tank 1, a slag discharge port 5 is communicated and arranged above the left side and the right side of the air flotation tank 1, a liquid discharge pipe 6 is communicated and arranged below the left side of the air flotation tank 1, a liquid discharge valve is arranged on the liquid discharge pipe 6, the air extractor 2 is arranged at the bottom in the air flotation tank 1, the output end of the air inlet pipe 3 and the input end of the air exhaust pipe 4 are respectively communicated with the right side wall and the top of the air extractor 2 in a sealing manner, the input end of the air inlet pipe 3 penetrates through the right side; the air flotation tank comprises two groups of sliders 7, two groups of arched cross beams 8 and two groups of threaded columns 9, wherein the two groups of arched cross beams 8 are respectively arranged on the front side and the rear side of the top end of the air flotation tank 1, the two groups of sliders 7 are respectively sleeved outside the two groups of threaded columns 9 in a threaded manner, the left side and the right side of the two groups of arched cross beams 8 are respectively and transversely provided with a first through groove, a first ball group is rotatably fixed inside the four first through grooves, the left end and the right end of the two groups of threaded columns 9 respectively penetrate through the four first ball groups and respectively extend out of the two groups of arched cross beams 8, the left side and the right side of the two groups of threaded columns 9 are respectively and fixedly sleeved with positioning rings 10, the four positioning rings 10 are respectively contacted with the left side wall and the right side wall of the two groups of arched cross beams 8, the top ends of the two groups of arched cross beams 8, the inner sides of the four groups of clamping blocks 12 are connected with clamping springs, the inner sides of the four groups of clamping blocks 12 are connected with clamping plates 13, the clamping device also comprises a clamping piece 14 and a scraping blade 15, the scraping blade 15 is installed at the bottom end of the clamping piece 14, and the front side and the rear side of the clamping piece 14 are respectively clamped between the two groups of clamping plates 13 positioned on the front side and the two groups of clamping plates 13 positioned on the rear side; it can be through synchronous two sets of screw thread posts 9 of rotating, drive two sets of sliders 7 and carry out synchronous lateral shifting, again because the restriction of receiving two sets of transverse sliding groove, make two sets of sliders 7 only lateral shifting and do not rotate, and then drive two sets of doctor-bar 15 and carry out lateral shifting, doctor-bar 15 stretches into to inside the flotation tank 1, make its suspended solid realize semi-automatization and skim off, the efficiency is got rid of in the improvement, the reinforcing practicality, first ball group assists screw thread post 9 to rotate more in the same direction as smooth, position circle 10 carries out horizontal spacing to screw thread post 9, the design that splint 13 pressed from both sides the dress makes things convenient for 15 pull dismouting of doctor-bar, so that later stage.

The utility model discloses a advection type dissolved air flotation machine, still include and adsorb box 16, adsorb box 16 and install in the front side of air supporting box 1, adsorb the box 16 inside and be provided with the absorption chamber, adsorb 16 top intercommunication of box and be provided with the change mouth, and be provided with apron 17 in change mouth department, adsorb the intracavity portion and placed and adsorb the carbon, air supporting box 1 front side top sealed intercommunication has inlet pipe 18, inlet pipe 18 output passes worker's absorption box 16 rear side wall and stretches into to adsorb box 16 inside below, inlet pipe 18 and absorption box 16 mechanical seal, it has material discharge pipe 19 to adsorb box 16 left side wall top sealed intercommunication, material discharge pipe 19 top sealed intercommunication has exhaust fan 20, exhaust fan 20 installs in adsorbing box 16 left side wall top; it can be through exhaust fan 20 with gas take out inside adsorbing box 16, adsorb waste water foul smell through adsorbing the carbon to can open apron 17 and change and adsorb the carbon, improve its result of use, adsorb the carbon and be the common material in market, buy back direct use can, exhaust fan 20 is the common electrical part in market, only need when buying back the use according to the instruction book electricity connection of buying back together can use, so no longer describe here.

The horizontal flow type dissolved air flotation machine of the utility model also comprises a fixed shaft 21, a handle 22, a rotating column 23 and a stirring rod group 24, wherein the stirring rod group 24 is positioned inside the adsorption box 16, the handle 22 can be rotationally fixed at the top end of the fixed shaft 21, the top end of the rotating column 23 is connected with the fixed shaft 21, and the stirring rod group 24 is arranged on the rotating column 23; it can make it drive stirring rod group 24 and stir the absorption carbon through manual rotation handle 22, and it is more even to make things convenient for the absorption carbon to use, reduces extravagantly, and the convenient rotation of design that handle 22 can the rotation is more convenient.

The utility model discloses a advection type dissolves gas air supporting machine, 17 tops of apron communicate to be provided with the second through-groove to at the rotatable second ball group that is fixed with of second through-groove inside wall, the bottom of rotation post 23 passes the second ball group and stretches into to adsorb inside the box 16, the fixed cover in the rotation post 23 outside is equipped with two sets of spacing rings, two sets of spacing rings respectively with 17 tops of apron and bottom contact; it can rotate more smoothly through the supplementary post 23 that rotates of second ball group to conveniently carry out vertical spacing to post 23 through two sets of spacing collars, make things convenient for it to rotate only and not longitudinal movement.

The utility model discloses a advection type dissolves gas air supporting machine still includes supporting bench 25, supporting shoe 26, motor 27, transmission shaft 28, first gear 29 and two sets of second gear 30, supporting bench 25 installs in the upper right side of air supporting box 1, supporting shoe 26 installs on supporting bench 25 top, motor 27 installs on supporting shoe 26 top, the both ends are connected with first gear 29 right side center and motor 27 left side output respectively about transmission shaft 28, two sets of second gear 30 install respectively at two sets of threaded post 9 right-hand members, two sets of second gear 30 all mesh with first gear 29; it can drive the epaxial first gear 29 of transmission through motor 27 work and rotate, and two sets of second gears 30 all make with first gear 29 meshing conveniently drive two sets of screw thread posts 9 and carry out synchronous semi-automatization and rotate, and it is more convenient to use, and motor 27 is the common electrical part in market, only need to purchase the instruction book electricity that returns when using according to together and connect and can use, so no longer describe herein.

The utility model discloses a horizontal flow type dissolved air flotation machine, the front side of an air flotation tank 1 is communicated with and provided with an observation port, and a transparent baffle 31 is hermetically connected at the observation port; it can be convenient to observe the inside of air supporting box 1 through the transparent baffle 31 of viewing aperture department.

The utility model discloses a horizontal flow type dissolved air flotation machine, the bottom end of an air flotation tank 1 is provided with an anti-skid pad 32; it can strengthen the frictional force between air supporting box 1 and the ground through slipmat 32, reduces its holistic displacement, can improve holistic stability.

The exhaust pipe 4 of the horizontal flow type dissolved air flotation machine of the utility model is evenly provided with a plurality of groups; it can make the air supporting more even comprehensive through multiunit blast pipe 4.

The utility model discloses a advection type dissolves gas air supporting machine, it is at work, can drive two sets of sliders 7 and carry out synchronous lateral shifting through rotating two sets of screw thread post 9 in step, because receive the restriction of two sets of horizontal spouts again, make two sets of sliders 7 only lateral shifting and not rotate, and then drive two sets of doctor-bars 15 and carry out lateral shifting, doctor-bar 15 stretches into to the inside of air supporting box 1, make its suspended solid realize semi-automatization and skim off, improve and get rid of efficiency, strengthen the practicality, first ball group assists screw thread post 9 to rotate more smoothly, position circle 10 carries out horizontal spacing to screw thread post 9, the design that splint 13 presss from both sides makes things convenient for doctor-bar 15 pull dismouting, so that later stage clearance maintenance; the exhaust fan 20 can be used for pumping gas into the adsorption box 16, adsorbing wastewater and odor through adsorption carbon, and opening the cover plate 17 to replace the adsorption carbon, so that the using effect is improved, the adsorption carbon is a common material in the market and can be directly used after being bought, the exhaust fan 20 is a common electrical device in the market, and the adsorption carbon can be used after being bought for use only by being electrically connected according to a purchased instruction, so that the detailed description is omitted; the handle 22 can be manually rotated to drive the stirring rod group 24 to stir the adsorbed carbon, so that the adsorbed carbon is more uniformly used, the waste is reduced, and the design that the handle 22 can rotate is more convenient to rotate; the rotation of the rotating column 23 can be more smoothly assisted by the second ball group, and the rotating column 23 can be longitudinally limited conveniently by two groups of limiting rings, so that the rotating column can only rotate without longitudinally moving conveniently; the motor 27 can work to drive the first gear 29 on the transmission shaft 28 to rotate, the two groups of second gears 30 are meshed with the first gear 29, so that the two groups of threaded columns 9 can be conveniently driven to synchronously and semi-automatically rotate, the use is more convenient, the motor 27 is a common electric device in the market, and the motor 27 can be used only by being electrically connected according to a service instruction purchased together when being purchased for use, so that the details are not repeated; the inside of the air flotation tank 1 can be conveniently observed through the transparent baffle 31 at the observation port; the friction force between the air flotation tank 1 and the ground can be enhanced through the anti-slip mat 32, the integral displacement is reduced, and the integral stability can be improved; the air floatation can be more uniform and comprehensive through a plurality of groups of exhaust pipes 4.

The utility model discloses a advection type dissolves gas air supporting machine, above the mounting means of all parts, connected mode or the mode that sets up are the welding, riveting or other common mechanical means, wherein can slide/rotate fixedly promptly for slide/not dropping under the rotation state, seal the intercommunication and seal when two connecting pieces communicate promptly, and the concrete structure of its all parts, model and coefficient index are its from the area technique, as long as can reach all implementation of its beneficial effect, above-mentioned all with the electric module and be the common electrical part in market with electrical apparatus, buy when returning to the use only need connect according to the mutual electricity of the instruction manual of buying back together and can use, and control module is its common from taking the module, the event is all no longer repeated here.

The horizontal flow type dissolved air flotation machine of the utility model, under the condition of not being explained reversely, "upper, lower, left, right, front, back, inner, outer, vertical and horizontal" and other orientation words included in the term only represent the orientation of the term under the normal use state, or be a trivial term understood by those skilled in the art, and should not be considered as limiting the term, at the same time, the numerical terms "first," "second," and "third," etc. do not denote any particular quantity or order, but rather are used to distinguish one from another, furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A advection type dissolved air flotation machine comprises an air flotation tank (1), an air pumping device (2), an air inlet pipe (3) and an exhaust pipe (4), wherein an air flotation cavity is arranged in the air flotation tank (1), a liquid inlet is communicated and arranged at the top of the air flotation tank (1), slag outlets (5) are communicated and arranged above the left side and the right side of the air flotation tank (1), a liquid discharge pipe (6) is communicated and arranged below the left side of the air flotation tank (1), a liquid discharge valve is arranged on the liquid discharge pipe (6), the air pumping device (2) is arranged at the bottom in the air flotation tank (1), the output end of the air inlet pipe (3) and the input end of the exhaust pipe (4) are respectively communicated with the right side wall and the top of the air pumping device (2) in a sealing manner, the input end of the air inlet pipe (3) penetrates through the inner right side wall of the air flotation tank (1) and extends out of the air; it is characterized by also comprising two groups of sliding blocks (7), two groups of arched crossbeams (8) and two groups of threaded columns (9), wherein the two groups of arched crossbeams (8) are respectively arranged at the front side and the rear side of the top end of the air flotation tank (1), the two groups of sliding blocks (7) are respectively sheathed at the outer sides of the two groups of threaded columns (9) in a screw way, the left side and the right side of the two groups of arched crossbeams (8) are transversely provided with first through grooves, first ball groups are rotatably fixed in the four groups of first through grooves, the left end and the right end of the two groups of threaded columns (9) respectively penetrate through the four groups of first ball groups and respectively extend out of the two groups of arched crossbeams (8), the left side and the right side of the two groups of threaded columns (9) are fixedly sheathed with positioning rings (10), the four groups of positioning rings (10) are respectively contacted with the left side wall and the right side wall, two sets of sliding blocks (11) are installed respectively on two sets of slider (7) tops, two sets of slider (7) bottom left and right sides all is connected with clamp splice (12), and four groups of clamp splice (12) inboards all are connected with and press from both sides the dress spring, four groups of clamp splice (12) inboards all are connected with splint (13), still including clamping piece (14) and doctor-bar (15), doctor-bar (15) are installed in clamping piece (14) bottom, clamping piece (14) front and back both sides clamp respectively between two sets of splint (13) that are located the front side and between two sets of splint (13) that are located the rear side.

2. The advection type dissolved air flotation machine according to claim 1, further comprising an adsorption box (16), wherein the adsorption box (16) is installed on the front side of the air flotation tank (1), an adsorption cavity is arranged inside the adsorption box (16), a replacement port is arranged at the top end of the adsorption box (16) in a communicating manner, a cover plate (17) is arranged at the replacement port, adsorption carbon is placed inside the adsorption cavity, a feeding pipe (18) is hermetically communicated with the upper portion of the front side of the air flotation tank (1), the output end of the feeding pipe (18) penetrates through the rear side wall of the adsorption box (16) and extends into the lower portion of the inside of the adsorption box (16), the feeding pipe (18) is mechanically sealed with the adsorption box (16), a discharging pipe (19) is hermetically communicated with the upper portion of the left side wall of the adsorption box (16), an exhaust fan (20) is hermetically communicated with the upper portion of the discharging pipe (19), and the exhaust fan (20) is.

3. The horizontal-flow dissolved air flotation machine according to claim 2, further comprising a fixed shaft (21), a handle (22), a rotating column (23), and a stirring rod set (24), wherein the stirring rod set (24) is located inside the adsorption box (16), the handle (22) is rotatably fixed at the top end of the fixed shaft (21), the top end of the rotating column (23) is connected with the fixed shaft (21), and the stirring rod set (24) is mounted on the rotating column (23).

4. The horizontal-flow dissolved-air flotation machine according to claim 3, wherein the top end of the cover plate (17) is provided with a second through groove, a second ball group is rotatably fixed on the inner side wall of the second through groove, the bottom end of the rotating column (23) passes through the second ball group and extends into the adsorption box (16), two sets of limiting rings are fixedly sleeved on the outer side of the rotating column (23), and the two sets of limiting rings are respectively contacted with the top end and the bottom end of the cover plate (17).

5. The advection type dissolved air flotation machine according to claim 4, further comprising a support table (25), a support block (26), a motor (27), a transmission shaft (28), a first gear (29) and two sets of second gears (30), wherein the support table (25) is installed above the right side of the air flotation tank (1), the support block (26) is installed at the top end of the support table (25), the motor (27) is installed at the top end of the support block (26), the left end and the right end of the transmission shaft (28) are respectively connected with the center of the right side of the first gear (29) and the output end of the left side of the motor (27), the two sets of second gears (30) are respectively installed at the right ends of the two sets of threaded columns (9), and the two sets of second gears (30) are both meshed.

6. The advection type dissolved air flotation machine according to claim 5, characterized in that the front side of the air flotation tank (1) is communicated with an observation port, and a transparent baffle (31) is hermetically connected at the observation port.

7. The advection type dissolved air flotation machine according to claim 6, characterized in that the bottom end of the air flotation tank (1) is provided with a non-slip mat (32).

8. The advection type dissolved air flotation machine according to claim 7, characterized in that the exhaust pipes (4) are uniformly provided with a plurality of groups.