CN110482677B - Sewage treatment device based on partial backflow type pressure dissolved air floatation - Google Patents
Sewage treatment device based on partial backflow type pressure dissolved air floatation Download PDFInfo
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- 239000010865 sewage Substances 0.000 title claims abstract description 35
- 238000011282 treatment Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 140
- 238000006243 chemical reaction Methods 0.000 claims abstract description 54
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000005188 flotation Methods 0.000 claims abstract description 22
- 230000006837 decompression Effects 0.000 claims abstract description 18
- 238000007790 scraping Methods 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 12
- 238000010992 reflux Methods 0.000 claims abstract description 9
- 238000012856 packing Methods 0.000 claims description 13
- 239000000945 filler Substances 0.000 claims description 11
- 238000009300 dissolved air flotation Methods 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- -1 polypropylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 3
- 239000002351 wastewater Substances 0.000 abstract description 27
- 238000000034 method Methods 0.000 abstract description 13
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 13
- 239000003344 environmental pollutant Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 239000000470 constituent Substances 0.000 description 4
- 230000003311 flocculating effect Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 238000006124 Pilkington process Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a sewage treatment device based on partial reflux type pressure dissolved air floatation. The method is characterized in that: comprises a water pump, a sewage backflow pipe, a flowmeter, an air compressor, an ozone generator, a dissolved air tank, a decompression release valve, a dissolved air releaser, an air flotation reaction tank, a slag scraping device, a perforated water collecting pipe, a one-way valve and a water collecting tank. The water inlet of the water pump is connected with the sewage return pipe, and the water outlet of the water pump is connected with the dissolved air tank; the air compressor is connected with the ozone generator, and the ozone generator is connected with the dissolved air tank; the dissolved air releaser is arranged in the air flotation reaction tank, the residue scraping equipment is positioned above the air flotation reaction tank, the perforated water collecting pipe is positioned in the air flotation reaction tank, and the water collecting tank is used for storing water discharged from the air flotation reaction tank. The invention has the beneficial effects that: the COD content in sewage and wastewater can be reduced by ozone while the dissolved air floatation treatment of wastewater is completed, and the cost of sewage and wastewater treatment is effectively reduced.
Description
Technical Field
The invention belongs to the technical field of pressure dissolved air floatation, and particularly relates to a pressure dissolved air floatation device for treating domestic sewage and industrial wastewater which are subjected to primary treatment and have high COD and contain light suspended matters.
Background
The air floatation separation process is widely applied to water treatment. Particularly in the field of wastewater treatment, the air floatation method is widely applied. The air flotation method is a separation method for separating light substances such as oils, fibers, algae, and the like in water, and is a method for floating flocs formed by adsorbing suspended fine particles of wastewater by highly dispersed fine bubbles formed in water. The air floatation method makes up the defects of the precipitation method, so the air floatation method has obvious effect on removing light pollutants in various waste water.
The pressure dissolved air floatation method is to melt air into water by a pressurizer to ensure that the air is in a supersaturated state in the water, and then release small bubbles by decompression of a releaser, wherein the small bubbles carry light pollutants to float upwards so as to achieve the effect of removing the pollutants. The pressure dissolved air float process can be classified into: full dissolved air flotation, partial dissolved air flotation and backflow dissolved air flotation. At present, the pressure dissolved air floatation has the advantages of large air solubility, fine and stable air bubbles, good air floatation effect and the like, and is widely applied to water treatment and has good treatment effect.
The traditional pressure dissolved air flotation directly adopts air as an air source, and the effect which can be achieved by taking the air as the air source is only that flocculation and solid-liquid separation are completed in one operation unit, but the function is far from enough in modern wastewater treatment. Meanwhile, the filler in the dissolved air tank in the traditional pressure dissolved air flotation device is only a common filler, and the dissolved air water decompression releaser also has the defect of easy blockage, and the water treated by the device also needs to be subjected to a plurality of processes such as color removal, smell removal, taste removal, disinfection and the like, so that the operation process is complex. In conclusion, it is of great significance to develop a pressure dissolved air flotation device which can treat various pollutants and reduce cost.
Disclosure of Invention
In view of the defects of the existing air-compressing and air-dissolving air flotation device, the invention provides a sewage treatment device based on partial reflux type pressure air-dissolving air flotation, which can reduce the COD content in sewage and wastewater by using ozone while completing the treatment of wastewater by air-dissolving air flotation, and effectively reduce the cost of sewage and wastewater treatment.
In order to solve the technical problems, the technical scheme of the invention is as follows: the invention provides a sewage treatment device based on partial reflux type pressure dissolved air floatation. The method is characterized in that: comprises a water pump, a sewage backflow pipe, a flowmeter, an air compressor, an ozone generator, a dissolved air tank, a decompression release valve, a dissolved air releaser, an air flotation reaction tank, a slag scraping device, a perforated water collecting pipe, a one-way valve and a water collecting tank. The water inlet of the water pump is connected with the sewage return pipe, the flowmeter is arranged on the sewage return pipe, and the water outlet of the water pump is connected with the water inlet of the dissolved air tank; the air compressor is connected with the air inlet of the ozone generator, and the air outlet of the ozone generator is connected with the air inlet pipe and the air inlet of the dissolved air tank; the inside of the dissolved air tank comprises a filling area and a pressure gauge, the pressure gauge is positioned on the outer surface of the dissolved air tank, and a water outlet pipe of the dissolved air tank is connected with the decompression release valve; the dissolved air releaser is arranged in the air floatation reaction tank, and a water inlet of the dissolved air releaser is connected with a water outlet pipe of the dissolved air tank; the sewage return pipe is connected with a water outlet of the air floatation reaction tank, the slag scraping equipment is positioned above the air floatation reaction tank, and the perforated water collecting pipe is positioned in the air floatation reaction tank; the one-way valve is arranged on a water outlet pipe of the air floatation tank and an air inlet pipe of the dissolved air tank; the water collecting tank is used for storing the water discharged from the air floatation reaction tank.
By adopting the scheme, when the device works, the wastewater enters the air floatation tank, the wastewater passes through the air floatation tank, enters the perforated water collecting pipe, then is discharged, and a part of the wastewater enters the return pipe. And part of the returned sewage enters the dissolved air tank after being pressurized by the water pump. Meanwhile, an air compressor and an ozone generator are started, ozonized air is pressed into an air accommodating tank by the air compressor, then pressed-in pressurized backflow wastewater and pressurized ozonized air are mixed in a pressure container tank and are fully mixed through a filling area, then fully mixed wastewater enters a dissolved air releaser through a decompression release valve, dissolved air in ozone-containing wastewater entering the dissolved air releaser enters an air floatation tank through the dissolved air releaser to complete air floatation, and most wastewater enters a water collecting tank through a lower pipeline of the dissolved air releaser and does not participate in the reaction of the air floatation tank. After the wastewater entering the air flotation tank is subjected to air flotation reaction, clear water flows out of the perforated water collecting pipe and is mixed with the wastewater discharged from the lower pipeline of the dissolved air releaser to enter the water collecting reaction tank. The scum reacted in the floatation tank is treated by scum scraping equipment, and the treated waste water enters the perforated water collecting pipe and the return pipe to repeat the above operations, so that the effective treatment of sewage and waste water is realized.
The water pump is used for pressing the backflow treatment water into the dissolved air tank, and the pressurizing water pump is selected according to the water quantity and pressure of the dissolved air water to be pressurized, and is generally a pressurizing water pump with the pressure of 0.2-0.6 MPa.
The air compressor is used for pressurizing and blowing ozonized air generated by the ozone generator into the dissolved air tank, and a low-pressure miniature (0.6-1.0 MPa) air compressor is adopted.
The dissolved air tank includes a showerhead, a filler zone for dissolving pressurized ozonated air into the returning pressurized water.
Furthermore, the filler in the filler zone is a filler agent with a catalytic effect, which can increase the specific surface area on one hand, thereby increasing the mixing degree of water and gas; on the other hand, it can be used as catalyst of ozone, thus improving the activity of ozone and the treatment effect of ozone in waste water.
And further, the pressurized dissolved air water enters a dissolved air releaser of the air floatation reaction tank through a decompression release valve.
The dissolved air releaser is used for decompressing the pressurized dissolved air water and then releasing uniform micro-bubbles which are positioned in the air flotation reaction tank.
Furthermore, the dissolved air releaser releases small uniform bubbles to float after the pressure of the pressurized dissolved air water is reduced. The water of dissolving gas after decompression release is discharged through the outlet pipe in the lower part of the gas of dissolving releaser, and such advantage lies in leading flocculated floc disintegration when having avoided ozone and floc contact, and the waste water that contains ozone that separates simultaneously can get into the clear water that catchment reaction tank processing air supporting pond came out, realizes the high efficiency use of ozone.
Further, the separated wastewater with low COD and high BOD containing ozone can enter a unit behind the air floatation tank, so that the ozone in the water is utilized to treat the wastewater from the air floatation tank.
The air floatation tank comprises four parts of a dissolved air release area, an air floatation area, a slag scraping area and a clear water area.
Furthermore, small bubbles from the dissolved gas releaser float upwards after attaching light pollutants, and are collected by a slag scraping plate for treatment. The clear water reacted after passing through the air-flotation reaction tank is discharged in a centralized way through the perforated water collecting pipe, one part of the clear water is pressurized through the sewage return pipe and then returns to the dissolved air tank, and the other part of the clear water is mixed with the water discharged from the dissolved air releaser and enters the water collecting tank.
Compared with the traditional pressure dissolved air flotation device, the invention has the following advantages:
1. the device combines a plurality of reaction units together, completes multi-effect treatment simultaneously, is simple, reduces the occupied area of the device, reduces the investment of equipment and greatly saves the manufacturing cost.
2. The invention adopts ozonized air to replace air, and realizes the effects of removing color, smell, taste, disinfection, reducing COD and the like while finishing air floatation.
3. The packing area in the pressurized dissolved air tank adopts the catalyst packing, and the catalyst packing has the functions of increasing the mixing degree of gas and liquid, catalyzing ozone and promoting the ozone treatment effect.
4. The invention adopts the technical scheme that a water outlet pipe is arranged at the lower part of a dissolved air release area of an air floatation reaction tank. Most of the dissolved air water is directly discharged from a water outlet pipe at the lower part of the dissolved air releaser and does not enter an air floatation reaction area, so that the gas-liquid separation is indirectly realized, and the problem that flocculated flocs are destroyed by water of the releaser is solved. Meanwhile, most of ozone is separated, a small amount of ozone entering the air floatation tank can increase flocculating constituents, and meanwhile, more ozone is prevented from influencing the flocculating constituents; meanwhile, the separated ozone-containing wastewater can enter the next unit for reaction, so that the utilization rate of ozone is improved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
Fig. one is a schematic structural diagram of the device.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
referring to the figure I, the sewage treatment device based on partial reflux type pressure dissolved air floatation comprises a water pump 1, a sewage backflow pipe 2, a flowmeter 3, an air compressor 4, an ozone generator 5, a dissolved air tank 6, a decompression release valve 7, a dissolved air releaser 8, an air floatation reaction tank 9, a residue scraping device 10, a perforated water collecting pipe 11, a one-way valve 12 and a water collecting tank 13.
The water inlet of the water pump 1 is connected with the sewage return pipe 2, the flowmeter 3 is arranged on the sewage return pipe 2, and the water outlet of the water pump 1 is connected with the water inlet of the dissolved air tank 6 after being connected with a water pipe.
In the present embodiment, specifically, a pressurized water pump of 0.2 to 0.6MPa is used as the water pump 1.
The air compressor 4 is connected with an air inlet of the ozone generator 5, and an air inlet pipe connected with an air outlet of the ozone generator 5 is connected with an air inlet of the dissolved air tank 6.
In the present embodiment, specifically, the air compressor 4 is a low-pressure micro (0.6 to 1.0 MPa) air compressor.
The inside of the dissolved air tank 6 comprises a filling area 6-1 and a pressure gauge 6-2, the pressure gauge 6-2 is positioned on the outer surface of the dissolved air tank 6, and a water outlet pipe of the dissolved air tank 6 is connected with the decompression release valve 7.
In this embodiment, specifically, the main body of the packing region 6-1 is a polypropylene stepped ring, wherein the packing is a catalyst packing with large specific surface area and porosity; the water collecting area is positioned below the filler area 6-1, and a certain gap is reserved between the two areas; the pressure gauge 6-2 is positioned outside the dissolved air tank 6 and used for monitoring the pressure in the dissolved air tank 6.
Furthermore, the filler in the filler zone 6-1 is a filler agent with catalytic effect, which can increase the specific surface area on one hand, thereby increasing the mixing degree of water and gas; on the other hand, it can be used as catalyst of ozone, thus improving the activity of ozone and the treatment effect of ozone in waste water.
The dissolved air releaser 8 is arranged in the air floatation reaction tank 9, and the water inlet of the dissolved air releaser 8 is connected with the water outlet pipe of the dissolved air tank 6.
Further, the pressurized dissolved air water enters a dissolved air releaser 8 of an air flotation reaction tank 9 through a decompression release valve 7.
Furthermore, the dissolved air releaser 8 releases the pressurized dissolved air water to float uniformly and small bubbles after decompression. The water of dissolved air after decompression release is discharged through the outlet pipe in the lower part of the dissolved air releaser 8, so the advantage lies in that the flocculated flocs are disintegrated when ozone is in contact with the flocs, and the separated wastewater containing ozone can enter the water-collecting reaction tank to treat the clear water coming out of the air flotation tank, thereby realizing the high-efficiency use of ozone.
The sewage return pipe 2 is connected with a water outlet of the air flotation reaction tank 9, the slag scraping device 10 is positioned above the air flotation reaction tank 9, and the perforated water collecting pipe 11 is positioned in the air flotation reaction tank 9;
further, the separated wastewater with low COD and high BOD containing ozone can enter a unit behind the air floatation reaction tank 9, so that the wastewater from the air floatation tank is treated by the ozone in the water.
The air floatation reaction tank 9 comprises four parts of a dissolved air release area, an air floatation area, a slag scraping area and a clear water area.
Further, small bubbles from the dissolved gas releaser float upwards after attaching light pollutants, and are collected by the slag scraping device 10 for treatment. The clear water reacted after passing through the air-flotation reaction tank 9 is discharged in a centralized way through the perforated water collecting pipe 11, one part of the clear water is pressurized through the sewage return pipe 2 and then returns to the dissolved air tank 6, and the other part of the clear water is mixed with the water discharged from the dissolved air releaser 8 and enters the next water collecting tank 13.
The one-way valve 12 is arranged on a water outlet pipe of the air floatation reaction tank 9 and an air inlet pipe of the dissolved air tank 6;
the water collecting tank 13 is used for storing the effluent of the air flotation reaction tank 9.
The working principle of the invention is as follows:
in the implementation process, raw water to be treated enters the air floatation reaction tank 9 from a water inlet pipeline after a flocculating agent is added, and meanwhile, an external air source and the air compressor 4 are opened to press ozone into the dissolved air tank 6, and the dissolved air releaser 8 is opened. The effluent part of the process flows back and enters the dissolved air tank 6 under the action of the pressure water pump 1, the pressurized ozonized air and the pressurized reflux water are mixed by air and water when passing through the catalyst filling area 6-1, and the ozonized air treats COD and chroma in the reflux water. The pressurized gas-dissolved water enters a dissolved gas releaser 8 through a decompression release valve 7, the gas becomes small bubbles after passing through the dissolved gas releaser 8 and floats upwards to complete air floatation, the generated floating slag is removed through a slag scraping device 10, and the liquid is separated and enters a water collecting tank 13. Clear water passing through the reaction in the air floatation tank enters a water collecting tank 13 through a part of the perforated water collecting pipe 12; a portion enters the return pipe to repeat the above operation.
The invention has the following characteristics when in work:
1. the device combines a plurality of reaction units together, completes multi-effect treatment simultaneously, is simple, reduces the occupied area of the device, reduces the investment of equipment and greatly saves the manufacturing cost.
2. The invention adopts ozonized air to replace air, and realizes the effects of removing color, smell, taste, disinfection, reducing COD and the like while finishing air floatation.
3. The packing area in the pressurized dissolved air tank adopts the catalyst packing, and the catalyst packing has the functions of increasing the mixing degree of gas and liquid, catalyzing ozone and promoting the ozone treatment effect.
4. The invention adopts the technical scheme that a water outlet pipe is arranged at the lower part of a dissolved air release area of an air floatation reaction tank. Most of the dissolved air water is directly discharged from a water outlet pipe at the lower part of the dissolved air releaser and does not enter an air floatation reaction area, so that the gas-liquid separation is indirectly realized, and the problem that flocculated flocs are destroyed by water of the releaser is solved. Meanwhile, most of ozone is separated, a small amount of ozone entering the air floatation tank can increase flocculating constituents, and meanwhile, more ozone is prevented from influencing the flocculating constituents; meanwhile, the separated ozone-containing wastewater can enter the next unit for reaction, so that the utilization rate of ozone is improved.
The described embodiments are only a part of application examples of the present invention, and not all examples. The protection scope of the present invention is not limited to the embodiments, but equivalent modifications or changes made by those skilled in the art according to the disclosure of the present invention are within the protection scope of the present invention.
Claims (4)
1. The utility model provides a sewage treatment plant based on air supporting is dissolved to partial backward flow formula pressure which characterized in that: comprises a water pump (1), a sewage return pipe (2), a flowmeter (3), an air compressor (4), an ozone generator (5), a dissolved air tank (6), a decompression release valve (7), a dissolved air releaser (8), an air floatation reaction tank (9), a slag scraping device (10), a perforated water collecting pipe (11), a one-way valve (12) and a water collecting tank (13); the water inlet of the water pump (1) is connected with the sewage return pipe (2), the flowmeter (3) is arranged on the sewage return pipe (2), and the water outlet of the water pump (1) is connected with the water inlet of the dissolved air tank (6) after being connected with a water pipe; the air compressor (4) is connected with an air inlet of the ozone generator (5), and an air outlet of the ozone generator (5) is connected with an air inlet pipe and is connected with an air inlet of the dissolved air tank (6); the dissolved air tank (6) comprises a filling area (6-1) and a pressure gauge (6-2), the pressure gauge (6-2) is positioned on the outer surface of the dissolved air tank (6), and a water outlet pipe of the dissolved air tank (6) is connected with the decompression release valve (7); the dissolved air releaser (8) is arranged in the air floatation reaction tank (9), and a water inlet of the dissolved air releaser (8) is connected with a water outlet pipe of the dissolved air tank (6); the sewage return pipe (2) is connected with a water outlet of the air floatation reaction tank (9), the slag scraping equipment (10) is positioned above the air floatation reaction tank (9), and the perforated water collecting pipe (11) is positioned in the air floatation reaction tank (9); the one-way valve (12) is arranged on a water outlet pipe of the air floatation reaction tank (9) and an air inlet pipe of the dissolved air tank (6); the water collecting tank (13) is used for storing the effluent of the air floatation reaction tank (9); the decompression release valve (7) is connected with a water outlet pipe of the dissolved air tank (6) and then is connected with the dissolved air releaser (8), and the dissolved air releaser (8) is arranged in the air floatation reaction tank (9); and the lower part of the dissolved air releaser (8) in the air flotation reaction tank (9) is connected with a water outlet pipe, and the water outlet pipe is used for directly discharging the dissolved air water coming out of the dissolved air tank (6) into the water collecting tank (13) after decompression and release.
2. The sewage treatment plant based on the partial-reflux pressure dissolved air flotation as claimed in claim 1, wherein: the air compressor (4) is a low-pressure micro air compressor, the air compressor (4) is connected with the ozone generator (5), and ozonized air generated by the ozone generator (5) is pressed into the dissolved air tank (6).
3. The sewage treatment plant based on the partial reflux type pressure dissolved air flotation as claimed in any one of claims 1 to 2, wherein: the dissolved air tank comprises a packing area (6-1), a pressure gauge (6-2) and a water collecting area, wherein a main body of the packing area (6-1) adopts a polypropylene stepped ring, and the packing adopts a catalyst packing with large specific surface area and porosity; the water collecting area is positioned below the filler area (6-1), and a certain gap is reserved between the two areas; the pressure gauge (6-2) is positioned outside the dissolved air tank (6) and used for monitoring the pressure in the dissolved air tank (6).
4. The sewage treatment plant based on the partial reflux type pressure dissolved air flotation as claimed in any one of claims 1 to 2, wherein: the perforated water collecting pipe (11) and the sewage return pipe (2), the perforated water collecting pipe (11) is positioned in the air floatation reaction tank (9) and is used for collecting and discharging the effluent after air floatation reaction; the sewage return pipe (2) is connected with a water outlet pipe of the air floatation reaction tank (9), is positioned in front of the one-way valve (12) and is only used for discharging water after the reaction of the return air floatation reaction tank (9).
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| CN201910494723.4A CN110482677B (en) | 2019-06-10 | 2019-06-10 | Sewage treatment device based on partial backflow type pressure dissolved air floatation |
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| CN201910494723.4A CN110482677B (en) | 2019-06-10 | 2019-06-10 | Sewage treatment device based on partial backflow type pressure dissolved air floatation |
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| CN114604927A (en) * | 2022-03-18 | 2022-06-10 | 红云红河烟草(集团)有限责任公司 | Automatic adjustment air floatation device for sewage treatment |
| CN115304181B (en) * | 2022-07-01 | 2024-06-21 | 厦门慧鼎科技有限公司 | Ozone advanced treatment system and process for sewage |
| CN115321662A (en) * | 2022-08-23 | 2022-11-11 | 福建省闽环智能科技有限公司 | Ozone water treatment system |
| CN116161817A (en) * | 2023-02-07 | 2023-05-26 | 中建三局绿色产业投资有限公司 | Ozone air floatation treatment process for combined overflow sewage |
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| CN101508474B (en) * | 2009-02-20 | 2011-04-27 | 山东省高密蓝天节能环保科技有限公司 | Ozone air-float purifier |
| CN101941765A (en) * | 2010-07-23 | 2011-01-12 | 东北电力大学 | Flotation and sedimentation solid-liquid separation device |
| NO20160241A1 (en) * | 2016-02-12 | 2017-08-14 | Normex As | Method and apparatus for purification of water from aquaculture plants |
| CN205687595U (en) * | 2016-06-25 | 2016-11-16 | 济宁市瑞驰环保科技有限公司 | A kind of dissolved air flotation sewage treatment machine |
| BR102017006908B1 (en) * | 2017-04-04 | 2023-12-12 | Ouronitro Efluentes E Servicos Ltda | EXTRACTION AND PURIFICATION PROCESS OF HUMIC SUBSTANCES FROM SANITARY LANDFILL LEASE |
| CN206767742U (en) * | 2017-05-09 | 2017-12-19 | 山东省城市供排水水质监测中心 | A kind of multiphase flow air-floating apparatus of ozone Multi-class propagation |
| CN207903942U (en) * | 2018-01-31 | 2018-09-25 | 陕西城鸿实业有限公司 | A kind of oil field extracted water totally-enclosed air-floating apparatus |
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