Air flotation machine

Abstract

The utility model relates to the field of sewage treatment equipment, in particular to an air floatation machine, which comprises an air floatation tank and an air dissolving system, the air floatation tank is provided with an air floatation water outlet pipe, the air floatation tank is provided with an air floatation water inlet pipe, the air floatation water inlet pipe is provided with a medicine inlet pipe, the medicine inlet pipe is communicated with the air floatation water inlet pipe, a scum tank is fixed in the air floatation tank, and the scum tank is communicated with the air dissolving system. The scum tank is provided with a scum discharge pipe, a scum scraping device is fixed in the air floatation tank, a first partition plate is fixed in the air floatation tank, a plurality of buffer plates are arranged between the inner wall of the air floatation tank and the first partition plate in a crossed and equidistant mode, an overflow weir is arranged in the air floatation tank, and a bubble generator is arranged in the air floatation tank. According to the utility model, a plurality of buffer plates are arranged between the inner wall of the air floatation tank and the partition plate I in a crossed and equidistant manner, and the buffer plates can limit the flow of floc mixed liquid, so that the air floatation effect is prevented from being influenced by overlarge water flow in the air floatation tank.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment equipment, in particular to an air flotation machine. Background Art

[0002] Dissolved air flotation technology is a solid-liquid separation technology. It has the characteristics of high treatment efficiency, short start-up time and small footprint. It is widely used in the field of water treatment. It includes three basic processes: flocculation process, dissolved air release process and bubble-floc aggregation formation and separation process. The microbubbles in the container water are attached to the flocculated suspended matter. The microbubbles drive the suspended matter to rise to the surface of the liquid and are scraped into the scum tank by the scraping device and discharged through the scum discharge pipe. The lighter scum in the scum can be better treated by flotation, but the heavier scum is difficult to be treated. When the sewage first enters the flotation tank, the flow rate and impact force of the sewage are large and easily affect the flotation efficiency. Utility Model Content

[0003] The utility model provides an air flotation machine.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A flotation machine comprises an air flotation tank and a dissolved air system, wherein the air flotation tank is provided with an air flotation outlet pipe, the air flotation tank is provided with an air flotation inlet pipe, the air flotation inlet pipe is provided with a medicine inlet pipe, the medicine inlet pipe is connected to the air flotation inlet pipe, a scum pool is fixed in the air flotation tank, the scum pool is provided with a slag discharge pipe, a slag scraping device is fixed in the air flotation tank, a partition plate is fixed in the air flotation tank, a plurality of buffer plates are cross-equidistantly arranged between the inner wall of the air flotation tank and the partition plate, an overflow weir is arranged inside the air flotation tank, a bubble generator is arranged in the air flotation tank, the bubble generator is provided with an exhaust pipe, the The overflow weir is obliquely provided with partition plate 2, the inner wall of the flotation pool is provided with partition plate 3, a spiral shell is fixed in the flotation pool, a spiral rod is rotatably connected in the spiral shell, a motor bracket is provided on the outer wall of the flotation pool, a spiral motor is fixed on the motor bracket, a power output shaft of the spiral motor is fixedly connected to the spiral rod, a water flow trough is provided between the spiral shell and the inner wall of the flotation pool, a plurality of water flow holes are provided on the side of the spiral inner wall facing the water flow trough, the flotation pool is provided with a drain pipe, the drain pipe is provided with a water pump, one end of the drain pipe is connected to the water flow trough, and the other end of the drain pipe is connected to the flotation water inlet pipe.

[0006] Furthermore, the dissolved air system includes a reflux pump, a dissolved air tank, and an air compressor. The water inlet of the reflux pump is connected to the air flotation water outlet pipe, the water outlet of the reflux pump is connected to the water inlet of the dissolved air tank, the water outlet of the dissolved air tank is connected to the bubble generator and the air flotation water inlet pipe through a three-way joint, and the air inlet of the dissolved air tank is connected to the air compressor.

[0007] Further, the slag scraping device includes two sets of sprocket groups rotatably connected to the inner wall of the air flotation tank in opposition. Each set of sprocket groups meshes with a chain, and a plurality of slag scraping plates are fixed between the two opposite chains.

[0008] Further, the exhaust pipe is located between the overflow weir and the first partition plate.

[0009] Beneficial effects:

[0010] A plurality of buffer plates are arranged crosswise and equidistantly between the inner wall of the air flotation tank of the present utility model and the first partition plate. The buffer plates can limit the flow rate of the flocculated liquid mixture to avoid excessive water flow rate in the air flotation tank and affect the air flotation effect.

[0011] The second partition plate and the third partition plate of the present utility model are inclined. The heavier particles flow along the third partition plate into the spiral housing. The spiral motor starts to drive the spiral rod to rotate. The heavier particulate matter rises and is discharged under the action of the spiral line of the spiral rod. During the rising process of the heavier particles, part of the sewage carrying the heavier particles flows into the water flow tank through the water flow holes. The water in the water flow tank is discharged through the drain pipe. The water pump starts to pump the water out and into the air flotation inlet pipe to form a cycle. Description of the drawings

[0012] Figure 1 is the schematic diagram of the main view and full section structure of the present utility model Figure One ;

[0013] Figure 2 is the schematic diagram of the main view and full section structure of the present utility model Figure Two ;

[0014] Figure 3 is the schematic diagram of the main view and full section structure of the present utility model Figure Three ;

[0015] Figure 4 is the present utility model Figure 3 The partial enlarged view of A in.

[0016] In the figure: 1 air flotation tank, 2 dissolved air system, 3 air flotation inlet pipe, 4 chemical feeding pipe, 5 scum tank, 6 slag scraping device, 7 first partition plate, 8 buffer plate, 9 bubble generator, 10 overflow weir, 11 exhaust pipe, 12 second partition plate, 13 third partition plate, 14 spiral housing, 15 spiral rod, 16 motor bracket, 17 spiral motor, 18 water flow tank, 19 water flow hole, 20 reflux pump, 21 dissolved air tank, 22 air compressor, 23 air flotation outlet pipe, 24 drain pipe, 25 water pump, 26 slag discharge pipe. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0018] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0019] Referring to Figures 1 - 4 , a dissolved air flotation machine includes a flotation tank 1 and a dissolved air system 2. The flotation tank 1 is provided with a flotation water outlet pipe 23, the flotation tank 1 is provided with a flotation water inlet pipe 3, the flotation water inlet pipe 3 is provided with a chemical dosing pipe 4, and the chemical dosing pipe 4 is communicated with the flotation water inlet pipe 3. A scum tank 5 is fixed inside the flotation tank 1, the scum tank 5 is provided with a slag discharge pipe 26, a slag scraping device 6 is fixed inside the flotation tank 1, a partition board 7 is fixed inside the flotation tank 1, and a plurality of buffer plates 8 are arranged at equal intervals in a crosswise manner between the inner wall of the flotation tank 1 and the partition board 7. An overflow weir 10 is arranged inside the flotation tank 1, a bubble generator 9 is arranged inside the flotation tank 1, the bubble generator 9 is provided with an exhaust pipe 11, and the exhaust pipe 11 is located between the overflow weir 10 and the partition board 7. A partition board 12 is inclined on the overflow weir 10, a partition board 13 is arranged on the inner wall of the flotation tank 1, a spiral housing 14 is fixed inside the flotation tank 1, a spiral rod 15 is rotatably connected inside the spiral housing 14, a motor bracket 16 is arranged on the outer wall of the flotation tank 1, a spiral motor 17 is fixed on the motor bracket 16, and the power output shaft of the spiral motor 17 is fixedly connected to the spiral rod 15. A water flow channel 18 is arranged between the spiral housing 14 and the inner wall of the flotation tank 1, and a plurality of water flow holes 19 are arranged on one side of the inner wall of the spiral housing 14 facing the water flow channel 18. The flotation tank 1 is provided with a drain pipe 24, the drain pipe 24 is communicated with a water pump 25, and the drain pipe 24 is communicated with the water flow channel 18. The dissolved air system 2 includes a reflux pump 20, a dissolved air tank 21, and an air compressor 22. The water inlet of the reflux pump 20 is communicated with the flotation water outlet pipe 23, the water outlet of the reflux pump 20 is connected to the water inlet of the dissolved air tank 21, the water outlet of the dissolved air tank 21 is connected to the bubble generator 9 and the flotation water inlet pipe 3 through a three-way joint, and the air inlet of the dissolved air tank 21 is connected to the air compressor 22. The slag scraping device 6 includes two groups of sprocket sets rotatably connected to the inner wall of the flotation tank 1 in an opposing manner, each group of sprocket sets meshes with a chain, and a plurality of slag scraping plates are fixed between the two opposite chains.

[0020] Sewage flows in from the air flotation inlet pipe 3, and simultaneously the flocculant flows into the air flotation inlet pipe 3 through the chemical feeding pipe 4. The flocculant is mixed with the sewage in the air flotation inlet pipe 3, and the flocculated liquid mixture flows into the air flotation tank 1 and contacts the buffer plate 8. A plurality of buffer plates 8 arranged crosswise and at equal intervals can limit the flow rate of the flocculated liquid mixture to avoid excessive water flow rate in the air flotation tank 1 from affecting the air flotation effect. The microbubbles generated by starting the bubble generator 9 are discharged into the air flotation tank 1 through the exhaust pipe 11. The microbubbles flocculate with the particles in the sewage to form bubble flocs, and the bubble flocs float to the liquid surface of the air flotation tank 1 to form scum. By the rotation of the sprocket of the scum scraping device 6, the scum scraping plate on the chain is driven to move horizontally on the surface of the air flotation tank 1, and the scum is scraped into the scum tank 5. Some of the heavier particles in the sewage sink due to their large weight and fall onto the upper surfaces of the partition plate two 12 and the partition plate three 13. The partition plate two 12 and the partition plate three 13 are inclined. The heavier particles flow along the partition plate three 13 into the spiral housing 14. The spiral motor 17 is started to drive the spiral rod 15 to rotate. The heavier particulate matter rises and is discharged under the action of the spiral line of the spiral rod 15. During the rising process of the heavier particles, some of the sewage carrying the heavier particles flows into the water flow groove 18 through the water flow holes 19. The water in the water flow groove 18 is discharged through the drain pipe 24. The water pump 25 is started to pump the water out into the air flotation inlet pipe 3. The treated sewage is discharged through the air flotation outlet pipe 23. Part of the treated sewage in the air flotation outlet pipe 23 flows into the dissolved air tank 21 through the reflux pump 20. At the same time, the air compressor 22 pressurizes the dissolved air tank 21 and inputs air. The air dissolves in the liquid in the dissolved air tank 21 to form dissolved air water. The dissolved air water, the sewage flowing in from the air flotation inlet pipe 3, and the flocculant flowing in from the chemical feeding port enter the bubble generator 9 together and work in a cycle; Another part of the treated sewage in the air flotation tank 1 flows out through the air flotation outlet pipe 23 to complete the treatment.

[0021] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An air flotation machine, characterized in that: It includes a dissolved air flotation tank (1) and a dissolved air system (2). The dissolved air flotation tank (1) is provided with a dissolved air outlet water pipe (23), the dissolved air flotation tank (1) is provided with a dissolved air inlet water pipe (3), the dissolved air inlet water pipe (3) is provided with a chemical feeding pipe (4), and the chemical feeding pipe (4) is communicated with the dissolved air inlet water pipe (3). A scum tank (5) is fixed inside the dissolved air flotation tank (1), and the scum tank (5) is provided with a slag discharge pipe (26). A slag scraping device (6) is fixed inside the dissolved air flotation tank (1), a partition board one (7) is fixed inside the dissolved air flotation tank (1), and a plurality of buffer plates (8) are arranged at equal intervals in a cross shape between the inner wall of the dissolved air flotation tank (1) and the partition board one (7). An overflow weir (10) is arranged inside the dissolved air flotation tank (1), a bubble generator (9) is arranged inside the dissolved air flotation tank (1), the bubble generator (9) is provided with an exhaust pipe (11), a partition board two (12) is inclinedly arranged on the overflow weir (10), a partition board three (13) is arranged on the inner wall of the dissolved air flotation tank (1), a spiral housing (14) is fixed inside the dissolved air flotation tank (1), a spiral rod (15) is rotatably connected inside the spiral housing (14), a motor support (16) is arranged on the outer wall of the dissolved air flotation tank (1), a spiral motor (17) is fixed on the motor support (16), the power output shaft of the spiral motor (17) is fixedly connected with the spiral rod (15), a water flow channel (18) is arranged between the spiral housing (14) and the inner wall of the dissolved air flotation tank (1), and a plurality of water flow holes (19) are arranged on one side of the spiral inner wall facing the water flow channel (18). The dissolved air flotation tank (1) is provided with a drain pipe (24), the drain pipe (24) is provided with a water pump (25), one end of the drain pipe (24) is communicated with the water flow channel (18), and the other end of the drain pipe (24) is communicated with the dissolved air inlet water pipe (3).

2. The air flotation machine according to claim 1, characterized in that: The dissolved air system (2) includes a reflux pump (20), a dissolved air tank (21), and an air compressor (22). The water inlet of the reflux pump (20) is communicated with the dissolved air outlet water pipe (23), the water outlet of the reflux pump (20) is connected with the water inlet of the dissolved air tank (21), the water outlet of the dissolved air tank (21) is connected with the bubble generator (9) and the dissolved air inlet water pipe (3) through a three-way joint, and the air inlet of the dissolved air tank (21) is connected with the air compressor (22).

3. The air flotation machine according to claim 1, characterized in that: The slag scraping device (6) includes two groups of sprocket sets that are oppositely and rotatably connected to the inner wall of the dissolved air flotation tank (1). Each group of sprocket sets meshes with a chain, and a plurality of slag scraping plates are fixed between the opposite two chains.

4. An air flotation machine according to claim 1, characterized in that: The exhaust pipe (11) is located between the overflow weir (10) and the partition board one (7).

Images