CN221319468U - Rectangular radial flow dissolved air floatation - Google Patents
Rectangular radial flow dissolved air floatation Download PDFInfo
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- CN221319468U CN221319468U CN202323529762.4U CN202323529762U CN221319468U CN 221319468 U CN221319468 U CN 221319468U CN 202323529762 U CN202323529762 U CN 202323529762U CN 221319468 U CN221319468 U CN 221319468U
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- air
- dissolved air
- water
- tank
- slag
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 124
- 239000002893 slag Substances 0.000 claims abstract description 77
- 238000007599 discharging Methods 0.000 claims abstract description 44
- 239000010865 sewage Substances 0.000 claims abstract description 42
- 238000007790 scraping Methods 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000010802 sludge Substances 0.000 claims description 28
- 238000009300 dissolved air flotation Methods 0.000 claims description 12
- 238000005188 flotation Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 17
- 238000007667 floating Methods 0.000 abstract description 10
- 239000002245 particle Substances 0.000 abstract description 9
- 239000007787 solid Substances 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 abstract description 3
- 239000012071 phase Substances 0.000 abstract description 3
- 238000004090 dissolution Methods 0.000 abstract 2
- 239000003814 drug Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The utility model discloses a rectangular radial flow dissolved air floatation, which comprises an air floatation tank body, a dissolved air system, a dissolved air release system, a dosing reaction coil, a dissolved air water and sewage mixing and water distributing system, a water outlet system, a slag scraping system and a mud discharging system, wherein the dissolved air system consists of a dissolved air tank, a dissolved air water pump and an air compressor. The beneficial effects are that: the air floatation tank has the advantages that the water inlet distribution and the water outlet distribution of the air floatation tank are uniform, the horizontal flow velocity of sewage in the air floatation tank is low, the sewage inlet has small disturbance to the water body in the air floatation tank, the floating of solid or liquid particles is facilitated, the liquid phase (water) is dispersed into the gas phase (air chamber) by utilizing the kinetic energy provided by the air dissolving water pump, the liquid-gas contact area is greatly increased, the rapid and efficient air dissolution is realized, the air dissolution effect is good, the hydraulic retention time of the air dissolving tank is short, the pressure release and the air release are completed in two steps, the structure of the air dissolving release system is greatly simplified, the air dissolving tank can be arranged outside the air floatation tank, and the arrangement of the water inlet distribution system and the slag scraping system is not influenced.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a rectangular radial flow dissolved air floatation.
Background
The dissolved air flotation is widely used in sewage treatment technology, and generates a large amount of microbubbles in water through a dissolved air system and a dissolved air release system, so that the microbubbles are adhered to solid or liquid particles with the density close to that of the water in sewage, the whole density is smaller than that of the water, and the bubbles are lifted to the water surface by means of buoyancy, thereby achieving the purpose of solid-liquid or liquid-liquid separation. Rectangular dissolved air floatation has the advantages of occupation saving, easy processing, convenient management and the like, and is widely used in small and medium-sized sewage treatment projects. The traditional rectangular dissolved air floatation is advection type, namely, water is fed from the bottom of one short side of the air floatation tank and water is discharged from the bottom of the other short side of the air floatation tank. The disadvantages of this structure are: the sewage inflow has larger disturbance to the water body in the air floatation tank, which is not beneficial to the floating of solid or liquid particles; the dissolved air water releases air in the air floatation tank, and solid or liquid particles are mixed and contacted with the dissolved air water in the air floatation tank by virtue of diffusion, so that short flow, uneven mixing and insufficient contact are easy to influence the air floatation treatment effect; the structure of scraping and discharging mud is not efficient enough, so the operation effect and efficiency are not ideal. Therefore, it is very desirable to provide an air floatation device with a more reasonable structure, sufficient mixing and contact of sewage and dissolved air and water, rapid water inlet and water distribution, rapid floating of solid particles or liquid particles, rapid deslagging and sludge discharging, and better operation effect and efficiency, so as to obtain better production benefits.
The attention points are placed on the dissolved air system and the dissolved air release system in the industry, and the influence of the air floatation tank body structure on the air floatation operation effect and efficiency is ignored, and the influence of the slag scraping and mud discharging structure on the air floatation operation effect and efficiency is ignored; the concept that the dissolved air water can be released in advance and then mixed and contacted with sewage is wrongly negated by emphasizing the 'extremely quick release air' in the development process of the dissolved air release system, and the traditional dissolved air release device has the advantages of small dissolved air water quantity, large quantity and easy blockage, and can only be arranged in an air floatation tank, thereby influencing the arrangement of a water inlet and distribution system and the arrangement of a slag scraping system.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of utility model
Aiming at the problems in the related art, the utility model provides a rectangular radial flow dissolved air floatation to overcome the technical problems existing in the related art.
The technical scheme of the utility model is realized as follows:
The rectangular radial flow dissolved air flotation comprises an air flotation tank body, a dissolved air system, a dissolved air release system, a chemical adding reaction coil, a dissolved air water and sewage mixing and water distribution system, a water outlet system, a slag scraping system and a mud discharging system, wherein the dissolved air system consists of a dissolved air tank, a dissolved air water pump and an air compressor, the dissolved air release system consists of a pressure release valve and a dissolved air release device, the dissolved air water and sewage mixing and distribution system consists of a dissolved air water and sewage mixing pipe and a water distribution pipe, the water outlet system consists of a water outlet pipe and a water collecting tank, the slag scraping system consists of a slag scraping plate, a slag discharging plate, a slag collecting tank, a speed reducer and a transmission device, and the mud discharging system consists of a mud collecting hopper, a mud collecting pipe, a mud discharging pipe and a mud discharging valve.
Preferably, an internal float valve is arranged in the dissolved air tank, an inlet of the internal float valve is connected with the air compressor, an upper air chamber and a lower liquid chamber are formed in the dissolved air tank, and a dispersing nozzle is arranged at a water inlet of the dissolved air tank.
Preferably, the dissolved air releaser comprises an outer cylinder and an inner cylinder, wherein the tail end of the inner cylinder is a necking.
Preferably, the gas-dissolved water and sewage mixing pipe is connected with the water distribution pipe, and the water distribution pipe is connected with two rotary mixing cylinders.
Preferably, the outlet of the water outlet pipe is arranged in the water collecting tank, one end of the water outlet pipe is connected with the inlet of the water outlet pipe and the bottom of the air floatation tank body, and water baffle plates are arranged at the inlet of the water outlet pipe and the inside of the air floatation tank body.
Preferably, the slag scraping plate is arranged on the surface of the air floatation tank body, one end of the air floatation tank body is provided with the slag collecting groove, the connecting part of the slag collecting groove and the air floatation tank body is provided with the slag discharging plate, and the outer edge of the slag discharging plate is provided with a hole groove.
Preferably, the sludge collecting hopper is located below the air floatation tank body, the sludge collecting pipe is arranged at the bottom of the sludge collecting hopper, the sludge discharging valve is arranged on the sludge discharging pipe and is an electric valve, and the sludge discharging valve is controlled by a PLC.
The utility model provides rectangular radial flow dissolved air floatation, which has the following beneficial effects:
The water inlet and outlet of the air floatation tank are uniform, the horizontal flow velocity of sewage in the air floatation tank is low, the sewage inlet has small disturbance to the water body in the air floatation tank, the floating of solid or liquid particles is facilitated, the liquid phase (water) is dispersed into the gas phase (air chamber) by utilizing the kinetic energy provided by the gas dissolving water pump, the liquid-gas contact area is greatly increased, the rapid and efficient gas dissolving is realized, the gas dissolving effect is good, the hydraulic retention time of the gas dissolving tank is short, the pressure release and the gas release are completed in two steps, the structure of the gas dissolving release system is greatly simplified, and the device can be arranged outside the air floatation tank without influencing the arrangement of the water inlet and the slag scraping system; the dissolved air water is not mixed with sewage before releasing air, so that the problem that the dissolved air water is diluted by sewage and the air release is incomplete is avoided; the sewage and the medicament are mixed and reacted in the dosing reaction coil pipe on the whole line Cheng Tuanliu, short flow does not occur, the reaction efficiency is high, the effect is good, the occupied area is saved, the investment is saved, the energy consumption is reduced, the medicament is saved, and the environmental sanitation condition is good; the effect, efficiency and reliability of slag scraping are guaranteed, the water content of the scraped slag is low, and the slag discharging volume and the subsequent treatment cost of the slag are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic top plan view of a rectangular radial flow dissolved air flotation device in accordance with an embodiment of the present utility model;
FIG. 2 is a schematic cross-sectional view of a rectangular radial flow dissolved air flotation device according to an embodiment of the present utility model;
FIG. 3 is a left side view of a rectangular radial flow dissolved air flotation in accordance with an embodiment of the present utility model;
fig. 4 is a right side view of a rectangular radial flow dissolved air flotation in accordance with an embodiment of the present utility model.
In the figure:
01. An air floatation tank body; 02. a dissolved air tank; 03. a dissolved air water pump; 04. an air compressor; 05. a pressure release valve; 06. a dissolved air releaser; 07. a dosing reaction coil; 08. a gas-dissolved water and sewage mixing pipe; 09. a water distribution pipe; 10. a water outlet pipe; 11. a water collection tank; 12. a slag scraping plate; 13. a slag discharging plate; 14. a slag collecting groove; 15. a speed reducer; 16. a transmission device; 17. a mud collecting hopper; 18. a mud collecting pipe; 19. a mud pipe; 20. a mud discharging valve; 21. built-in float valve; 22. an upper air chamber; 23. a liquid discharging chamber; 24. a dispersing nozzle; 25. an outer cylinder; 26. an inner cylinder; 27. necking; 28. a rotary mixing drum; 29. a water baffle; 30. and a hole groove.
Detailed Description
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
Referring to fig. 1-4, a rectangular radial flow dissolved air floatation according to an embodiment of the utility model comprises an air floatation tank body 01, a dissolved air system, a dissolved air release system, a chemical adding reaction coil 07, a dissolved air water and sewage mixing and distributing system, a water outlet system, a slag scraping system and a mud discharging system, wherein the dissolved air system consists of a dissolved air tank 02, a dissolved air water pump 03 and an air compressor 04, the dissolved air release system consists of a pressure release valve 05 and a dissolved air releaser 06, the dissolved air water and sewage mixing and distributing system consists of a dissolved air water and sewage mixing pipe 08 and a water distributing pipe 09, the water outlet system consists of a water outlet pipe 10 and a water collecting tank 11, the slag scraping system consists of a slag scraping plate 12, a slag discharging plate 13, a slag collecting groove 14, a speed reducer 15 and a transmission device 16, the sludge discharging system consists of a sludge collecting hopper 17, a sludge collecting pipe 18, a sludge discharging pipe 19 and a sludge discharging valve 20, water inlet and outlet of an air floatation tank are uniform, the horizontal flow rate of sewage in the air floatation tank is low, the disturbance of the sewage inlet to the water body in the air floatation tank is small, the floating of solid or liquid particles is facilitated, the liquid phase (water) is dispersed into a gas phase (gas chamber) by utilizing the kinetic energy provided by a gas dissolving water pump, the liquid-gas contact area is greatly increased, the rapid and efficient gas dissolving is realized, the gas dissolving effect is good, the hydraulic retention time of the gas dissolving tank is short, the pressure releasing and the gas releasing are completed in two steps, and the structure of the gas dissolving releasing system is greatly simplified; the effect, efficiency and reliability of slag scraping are guaranteed, the water content of the scraped slag is low, and the slag discharging volume and the subsequent treatment cost of the slag are reduced.
In an embodiment, referring to fig. 1, 3 and 4 of the specification, an internal float valve 21 is disposed in the dissolved air tank 02, an inlet of the internal float valve 21 is connected with the air compressor 04, an upper air chamber 22 and a lower liquid chamber 23 are formed in the dissolved air tank 02, a water inlet of the dissolved air tank 02 is provided with a dispersion nozzle 24, and under the action of the internal float valve 21, when the liquid level in the dissolved air tank 02 is higher than a set value, the float floats, the internal float valve 21 is automatically opened to start air intake; when the liquid level in the dissolved air tank 02 is lower than a set value, the floating ball falls, the built-in floating ball valve 21 is automatically closed, so that the automatic control of air intake is realized, the liquid level in the dissolved air tank 02 is always kept at the set value, and the dispersing nozzle 24 disperses and sprays the inlet water into the upper air chamber 22 in the dissolved air tank 02.
In an embodiment, referring to fig. 4 of the specification, the dissolved air releaser 06 includes an outer cylinder 25 and an inner cylinder 26, wherein the inner cylinder 26 is terminated with a constriction 27, the pressure in the dissolved air tank 02 before the pressure release valve 05 and the pressure of the dissolved air water after the pressure release valve 05 are maintained by the action of the pressure release valve 05, and the dissolved air releaser 06 is used for rapidly releasing the dissolved air under the conditions of swirling, mixing and short residence of the dissolved air water after the pressure release.
In an embodiment, referring to fig. 1 and 3 of the specification, the gas-dissolved water and sewage mixing pipe 08 is connected with the water distribution pipe 09, and two rotary mixing drums 28 are connected on the water distribution pipe 09, so as to prolong the mixing contact time of the gas-dissolved water and the sewage.
In an embodiment, referring to fig. 1 and 3 of the specification, the outlet of the water outlet pipe 10 is disposed in the water collecting tank 11, one end of the water outlet pipe 10 is connected with the inlet of the water outlet pipe 10 and the bottom of the air floatation tank body 01, water baffles 29 are disposed at the inlet of the water outlet pipe 10 and the inside of the air floatation tank body 01, the slag scraping plates 12 are disposed on the tank surface of the air floatation tank body 01, the number of the slag scraping plates 12 is set according to the amount of the sewage slag, the effect and efficiency of slag scraping are ensured, the scraped slag falls into the slag collecting tank 14, the slag scraping is fast and efficient, and the slag is not caused by large slag amount and slag scraping efficiency, and the slag is not sunk and flows out along with the water.
In an embodiment, as shown in fig. 3 and 4 of the present application, one end of the air floatation tank body 01 is provided with the slag collecting groove 14, a connection part between the slag collecting groove 14 and the air floatation tank body 01 is provided with the slag discharging plate 13, an outer edge of the slag discharging plate 13 is provided with a hole groove 30, the slag scraping plate 12 is tightly attached to the arc slag discharging plate 13, slag leakage caused by the fact that the slag scraping plate 12 is not tightly attached to the slag discharging plate 13 during slag scraping is avoided, deformation or mechanical failure of the slag scraping plate 12 caused by the fact that the slag scraping plate 12 is tightly attached to the arc slag discharging plate 13 is avoided, therefore the effect, efficiency and reliability of slag scraping are guaranteed, a hole groove 30 gap exists between the slag scraping plate 12 and the slag discharging plate 13, clear liquid can flow back to the air floatation tank through the hole groove 30 gap, the low water content of the scraped slag is guaranteed, and the volume of slag discharging and the subsequent processing cost of the slag are reduced.
In an embodiment, referring to fig. 2 of the specification, the sludge collecting hopper 17 is located below the air floatation tank body 01, the sludge collecting pipe 18 is disposed at the bottom of the sludge collecting hopper 17, the sludge discharging valve 20 is disposed on the sludge discharging pipe 19, and the sludge discharging valve 20 is an electric valve and is provided with PLC control, so that some solid particles with too large specific gravity and unable to float up can be deposited to the sludge collecting hopper 17 and discharged, and the settled sludge can be automatically discharged by using PLC control, so that the degree of automation is high and labor is saved.
In practical application, after the dissolved air water and sewage are mixed and contacted, the dissolved air water and sewage enter from the bottom of the air floatation tank body 01 and water is evenly distributed from the bottoms of the long sides of the two air floatation tanks, so that the dissolved air water and sewage mixed liquid in the air floatation tank is quickly and evenly distributed, and radial flow state which is beneficial to quick air floatation is formed, when the liquid level in the dissolved air tank 02 is higher than a set value, the floating ball floats upwards, the built-in float valve 21 is automatically opened, and air intake is started; when the liquid level in the dissolved air tank 02 is lower than a set value, the floating ball falls, the built-in floating ball valve 21 is automatically closed, the dispersing nozzle 24 disperses and sprays the inflow water into the upper air chamber 22 of the dissolved air tank 02, the pressure in the dissolved air tank 02 before the pressure release valve 05 is kept by the pressure release valve 05, and the pressure of the dissolved air water after the pressure release valve 05 is released, the dissolved air releaser 06 enables the dissolved air water after the pressure release to quickly release air under the conditions of rotational flow, mixing and short residence, the dissolved air water is not mixed with sewage before the air release, the problems that the dissolved air water is diluted by sewage and the air release is incomplete are avoided, the residence time is 3 s-10 s, the dissolved air water can be ensured to be fully released, and the released micro bubbles can not be combined to become the atmosphere to influence the air floatation treatment effect; the sewage enters from the inner cylinder 26 of the dissolved air releaser 06, and flows through the tail end necking 27 to enable a cavity between the outer cylinder 25 and the inner cylinder 26 of the dissolved air releaser 06 to form negative pressure under the jet flow effect, so as to assist in promoting the release of the dissolved air water, the released dissolved air water and the sewage after adding medicines are mixed and contacted in the dissolved air water and sewage mixing pipe 08, and are uniformly distributed to the bottom of a long central axis or the bottom of a long side of an air floatation tank through the water distribution pipe 09, two rotary mixing cylinders 28 are connected to the water distribution pipe 09, the mixing contact time of the dissolved air water and the sewage is prolonged, the slag scraping plate 12 is arranged on the tank surface of the air floatation tank body 01, the quantity of the slag scraping plate 12 is arranged according to the quantity of the slag of the sewage, the effect and the efficiency of slag scraping are ensured, and the scraped slag falls into the slag collecting tank 14.
Although the present disclosure describes embodiments, not every embodiment is described in terms of a single embodiment, and such description is for clarity only, and one skilled in the art will recognize that the embodiments described in the disclosure as a whole may be combined appropriately to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. The rectangular radial flow dissolved air flotation comprises an air flotation tank body (01), a dissolved air system, a dissolved air release system, a dosing reaction coil (07), a dissolved air water and sewage mixing and water distributing system, a water outlet system, a slag scraping system and a sludge discharging system, and is characterized in that the dissolved air system consists of a dissolved air tank (02), a dissolved air water pump (03) and an air compressor (04), the dissolved air release system consists of a pressure release valve (05) and a dissolved air releaser (06), the dissolved air water and sewage mixing and distributing system consists of a dissolved air water and sewage mixing pipe (08) and a water distributing pipe (09), the water outlet system consists of a water outlet pipe (10) and a water collecting tank (11), the slag scraping system consists of a slag scraping plate (12), a slag discharging plate (13), a slag collecting tank (14), a speed reducer (15) and a transmission device (16), and the sludge discharging system consists of a sludge collecting hopper (17), a sludge collecting pipe (18), a sludge discharging pipe (19) and a sludge discharging valve (20).
2. The rectangular radial flow dissolved air flotation device according to claim 1, wherein an internal float valve (21) is arranged in the dissolved air tank (02), an inlet of the internal float valve (21) is connected with the air compressor (04), an upper air chamber (22) and a lower liquid chamber (23) are formed in the dissolved air tank (02), and a dispersing nozzle (24) is arranged at a water inlet of the dissolved air tank (02).
3. A rectangular radial flow dissolved air flotation as claimed in claim 2, wherein the dissolved air releaser (06) comprises an outer barrel (25) and an inner barrel (26), wherein the inner barrel (26) terminates in a constriction (27).
4. A rectangular radial flow dissolved air flotation as claimed in claim 3, wherein the dissolved air and sewage mixing pipe (08) is connected with the water distribution pipe (09), and two rotary mixing drums (28) are connected to the water distribution pipe (09).
5. The rectangular radial flow dissolved air flotation of claim 4, wherein the outlet of the water outlet pipe (10) is arranged in the water collecting tank (11), one end of the water outlet pipe (10) is connected with the inlet of the water outlet pipe (10) and the bottom of the air flotation tank body (01), and water baffle plates (29) are arranged at the inlet of the water outlet pipe (10) and the inside of the air flotation tank body (01).
6. The rectangular radial flow dissolved air floatation device according to claim 5, wherein the slag scraping plate (12) is arranged on the surface of the floatation tank body (01), the slag collecting groove (14) is arranged at one end of the floatation tank body (01), the slag discharging plate (13) is arranged at the joint of the slag collecting groove (14) and the floatation tank body (01), and the hole groove (30) is formed in the outer edge of the slag discharging plate (13).
7. A rectangular radial flow dissolved air flotation as claimed in claim 6, wherein said sludge hopper (17) is positioned below said flotation tank body (01), said sludge collecting pipe (18) is provided with
The mud discharging valve (20) is arranged on the mud discharging pipe (19) at the bottom of the mud collecting hopper (17),
And the mud discharging valve (20) is an electric valve and is controlled by a PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323529762.4U CN221319468U (en) | 2023-12-25 | 2023-12-25 | Rectangular radial flow dissolved air floatation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323529762.4U CN221319468U (en) | 2023-12-25 | 2023-12-25 | Rectangular radial flow dissolved air floatation |
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| Publication Number | Publication Date |
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| CN221319468U true CN221319468U (en) | 2024-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202323529762.4U Active CN221319468U (en) | 2023-12-25 | 2023-12-25 | Rectangular radial flow dissolved air floatation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118561362A (en) * | 2024-07-25 | 2024-08-30 | 吉林建筑大学 | A multi-stage flotation treatment device for domestic sewage |
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2023
- 2023-12-25 CN CN202323529762.4U patent/CN221319468U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118561362A (en) * | 2024-07-25 | 2024-08-30 | 吉林建筑大学 | A multi-stage flotation treatment device for domestic sewage |
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