CN211339072U - Oxidation pond structure for sewage purification - Google Patents
Oxidation pond structure for sewage purification Download PDFInfo
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- CN211339072U CN211339072U CN201921623821.5U CN201921623821U CN211339072U CN 211339072 U CN211339072 U CN 211339072U CN 201921623821 U CN201921623821 U CN 201921623821U CN 211339072 U CN211339072 U CN 211339072U
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Abstract
An oxidation pond structure for sewage purification comprises an oxidation pond body and a plurality of sewage pipes; the sewage pipes are arranged above the oxidation pond body; a plurality of shunt pipes are arranged on the sewage pipe; the oxidation pond body comprises a filtering device, a filtering screen plate and a conveying device; the filtering device is arranged inside the oxidation pond body; the filtering device comprises a plurality of rolling columns and a fixing frame; the filter screen plate is arranged inside the oxidation pond body, and the filter screen plate is arranged in the middle of the oxidation pond body; the conveying device is arranged inside the oxidation pond body; the conveying device comprises a connecting rod, a first rolling part, a second rolling part, a conveying belt and a supporting rod; the oxidation pond body is provided with a water outlet and a sewage outlet. The utility model discloses a filter equipment and conveyer's design has realized the multiple filtration of sewage and the recycle of oxidant, has avoided the secondary pollution of oxidant, environmental protection.
Description
Technical Field
The utility model relates to a sewage oxidation treatment technical field especially relates to an oxidation pond structure for sewage purification.
Background
The sewage oxidation treatment method is one of sewage chemical treatment methods, is a method for oxidizing and decomposing pollutants in sewage by using a strong oxidant to purify the sewage, has become an important means for treating biologically refractory organic toxic pollutants, and has been applied to the treatment of sewage such as printing and dyeing, chemical industry, pesticides, papermaking, electroplating and printed boards, pharmacy, hospitals, mines, garbage percolate and the like. However, the current sewage treatment only adds the oxidant into the oxidation pond and then directly feeds the sewage into the oxidation pond. The method has low sewage treatment efficiency, oxidant can not be supplemented or recovered in time, sewage oxidation treatment is not thorough, and secondary pollution is easy to cause.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
For solving the technical problem who exists among the background art, the utility model provides an oxidation pond structure for sewage purification has realized the multiple filtration of sewage and the recycle of oxidant through filter equipment and conveyer's design, has avoided the secondary pollution of oxidant, environmental protection.
(II) technical scheme
In order to solve the problems, the utility model provides an oxidation pond structure for sewage purification, which comprises an oxidation pond body and a plurality of sewage pipes; the sewage pipes are arranged above the oxidation pond body; a plurality of shunt pipes are arranged on the sewage pipe; the oxidation pond body comprises a filtering device, a filtering screen plate and a conveying device; the upper part of the oxidation pond body is provided with a first through hole, and the middle part of the oxidation pond body is provided with a second through hole;
the filtering device is arranged inside the oxidation pond body; the filtering device comprises a plurality of rolling columns and a fixing frame; the rolling columns are arranged on the fixed frame in a side-by-side rolling manner; gaps are reserved among the rolling columns; one end of the fixing frame is arranged on the inner wall of the oxidation pond body, and the other end of the fixing frame is arranged at the position of the first through hole; one end of the fixing frame, which is positioned at the first through hole, extends out of the outer wall of the oxidation pond body; a first power mechanism for driving the rolling columns to roll is arranged on the oxidation pond body; a waste residue collecting piece for collecting sewage residues is arranged on the outer wall of the oxidation pond body; the waste residue collecting piece is arranged below the first through hole;
the filter screen plate is arranged inside the oxidation pond body, and the filter screen plate is arranged in the middle of the oxidation pond body;
the conveying device is arranged inside the oxidation pond body; the conveying device comprises a connecting rod, a first rolling part, a second rolling part, a conveying belt and a supporting rod; the first rolling piece is arranged at the position of the second through hole through the connecting rod; one end of the connecting rod is arranged on the outer wall of the oxidation pond body, and the other end of the connecting rod is connected with the first rolling piece; the second rolling piece is arranged in the oxidation pond body through a support rod; one end of the supporting rod is arranged at the bottom of the oxidation pond body, and the other end of the supporting rod is connected with the second rolling piece; a second power mechanism for driving the first rolling piece to rotate is arranged on the oxidation pond body; the conveying belt is an annular belt member and is arranged on the peripheries of the first rolling member and the second rolling member; a plurality of stirring pieces and a plurality of oxidation boxes are arranged on the conveying belt; the stirring pieces and the oxidation boxes are sequentially and alternately arranged on the conveyor belt, and the oxidation boxes are positioned between the two stirring pieces;
the oxidation pond body is provided with a water outlet and a sewage outlet.
Preferably, a sewage collecting box for collecting sewage scattered by the conveying device is arranged on the outer wall of the oxidation pond body; the sewage collecting box is arranged below the second through hole.
Preferably, the middle part of the oxidation pond body is provided with a third through hole for inserting the filter screen plate; the front end and the rear end of the filter screen plate are respectively an A end and a B end, and the side ends of the filter screen plate are respectively a C end and a D end; two sliding chutes for sliding the end C and the end D of the filter screen plate are arranged in the oxidation pond body; the filter screen plate is inserted into the third through hole and is arranged on the chute in a sliding manner; the end A of the filter screen plate is arranged at the position of the third through hole, and the end B of the filter screen plate is arranged in the oxidation pond body and is abutted against the inner wall of the oxidation pond body.
Preferably, the sieve pores on the filter screen plate are smaller than the impurities; a handle is arranged at the A end of the filter screen plate.
Preferably, the supporting rod is a telescopic rod, and a third power mechanism for driving the supporting rod to do telescopic motion is arranged on the oxidation pond body.
Preferably, the stirring piece is a triangular prism piece; two sides of the stirring part are arc-shaped surfaces, and the rest one side of the stirring part is arranged on the conveying belt.
Preferably, the water outlet is arranged in the middle of the oxidation pond body; the drain outlet is arranged at the lower part of the oxidation pond body.
Preferably, the filter device is obliquely arranged inside the oxidation pond body, and the height between one end of the filter device at the position of the first through hole and the bottom of the filter pond is lower than that between the other end of the filter device
In the utility model, the sewage pipe is provided with a plurality of shunt tubes, and the design of the shunt tubes reduces the flow velocity of the sewage, so that the sewage enters the oxidation pond body more gently and uniformly, and the filtering effect of the sewage is improved; due to the design of the rolling column of the filtering device, larger waste residues in the sewage can be intercepted at the filtering device, and the waste residues are conveyed to the waste residue collecting part through the rolling column, so that the sewage purification effect is improved; the filtering screen plate carries out secondary filtering operation on the sewage, smaller impurities can be intercepted by the filtering screen plate, and the sewage after two-layer filtering is subjected to oxidation treatment, so that the oxidation effect is better, and the practicability of the device is improved; the stirring piece and the oxidation box are arranged on the conveyor belt, the stirring piece is used for stirring the sewage, the oxidation effect of the sewage is improved, the oxidizing agent is filled in the oxidation box, and when the oxidation box is conveyed to the position of the second through hole through the conveyor belt, a worker can fill or recover the oxidizing agent at the position, so that the problems that the oxidizing agent cannot be recovered and is difficult to fill are solved, and the practicability of the device is improved; the water outlet is used for discharging the sewage after the oxidation treatment, and the sewage outlet is used for cleaning precipitated impurities such as sludge generated by the oxidation sewage.
In the utility model, the sewage collecting box is used for collecting the sewage which may be scattered in the conveying process of the conveying device, thereby avoiding the pollution to the environment caused by the overflow of the oxidation pond structure for sewage purification; the filter screen plate is inserted into the third through hole and is arranged on the chute in a sliding mode, and the sliding type design is convenient for treating sewage and waste residues remained on the filter screen plate after the filter screen plate is filtered, so that the practicability of the device is improved; the sieve pores on the filter screen plate are smaller than the impurities, so that smaller waste residues in the sewage can be filtered, and the sewage treatment effect is improved; the handle is arranged at the end A of the filter screen plate, so that the use comfort of the device is improved; the supporting rod is a telescopic rod, the height of the conveying device can be properly adjusted according to the amount of the sewage, and when the first rolling piece and the second rolling piece in the conveying device are positioned on the same horizontal line, the sewage directly falls on the conveying belt and is oxidized by the oxidant in the oxidation box, so that the sewage treatment effect is improved; the two side surfaces of the stirring part are arc surfaces, when the conveyor belt moves, the stirring part stirs sewage, and the sewage is guided to the position of the oxidation box through the guiding effect of the arc surfaces on the stirring part, so that the sewage oxidation treatment effect is improved; the water outlet is arranged in the middle of the oxidation pond body and used for discharging sewage after oxidation treatment, and the drain outlet is arranged at the lower part of the oxidation pond body and used for discharging products such as sludge and the like generated after oxidation sewage, so that the purification effect of waste water is improved; the filter device is obliquely arranged inside the oxidation pond body, and the waste residue is separated by using gravity, so that the energy is saved, and the practicability of the device is improved.
Drawings
Fig. 1 is a schematic side view of an oxidation pond structure for sewage purification according to the present invention.
Fig. 2 is a schematic structural view of an oxidation pond for purifying sewage according to the present invention.
Fig. 3 is a schematic structural view of an oxidation pond body in an oxidation pond structure for sewage purification according to the present invention.
Fig. 4 is a schematic view of a filtering screen plate structure in an oxidation pond structure for sewage purification according to the present invention.
Fig. 5 is a schematic structural view of a filtering device in an oxidation pond structure for sewage purification according to the present invention.
Fig. 6 is a schematic view of a fixing frame structure in an oxidation pond structure for sewage purification according to the present invention.
Fig. 7 is a schematic view of a rolling column structure in an oxidation pond structure for sewage purification according to the present invention.
Fig. 8 is a schematic structural view of a stirring member in an oxidation pond structure for sewage purification according to the present invention.
Reference numerals: 1. an oxidation pond body; 2. a sewage pipe; 3. a shunt tube; 4. a filtration device; 5. a filter screen plate; 6. a waste residue collection member; 7. a conveying device; 8. a sewage collection box; 9. a connecting rod; 10. a first rolling member; 11. a second rolling member; 12. a conveyor belt; 13. a support bar; 14. a first power mechanism; 15. A stirring member; 16. an oxidation box; 17. a grip; 18. a first through hole; 19. a water outlet; 20. a second through hole; 21. a second power mechanism; 22. a third power mechanism; 23. a rolling post; 24. a fixed mount; 25. a sewage draining outlet; 26. a third through hole; 27. a chute.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-8, the oxidation pond structure for sewage purification provided by the present invention comprises an oxidation pond body 1 and a plurality of sewage pipes 2; a plurality of sewage pipes 2 are arranged above the oxidation tank body 1; a plurality of shunt pipes 3 are arranged on the sewage pipe 2; the oxidation pond body 1 comprises a filtering device 4, a filtering screen plate 5 and a conveying device 7; the upper part of the oxidation pond body 1 is provided with a first through hole 18, and the middle part of the oxidation pond body 1 is provided with a second through hole 20;
the filtering device 4 is arranged inside the oxidation pond body 1; the filtering device 4 comprises a plurality of rolling columns 23 and a fixed frame 24; a plurality of rolling columns 23 are arranged on the fixed frame 24 in a side-by-side rolling manner; gaps are reserved among the rolling columns 23; one end of the fixing frame 24 is arranged on the inner wall of the oxidation pond body 1, and the other end of the fixing frame 24 is arranged at the position of the first through hole 18; one end of the fixing frame 24 positioned at the position of the first through hole 18 extends out of the outer wall of the oxidation pond body 1; the oxidation pond body 1 is provided with a first power mechanism 14 for driving a plurality of rolling columns 23 to roll; a waste residue collecting piece 6 for collecting sewage residues is arranged on the outer wall of the oxidation pond body 1; the waste residue collection member 6 is disposed below the first through hole 18;
the filter screen plate 5 is arranged inside the oxidation pond body 1, and the filter screen plate 5 is arranged in the middle of the oxidation pond body 1;
the conveying device 7 is arranged inside the oxidation pond body 1; the conveying device 7 comprises a connecting rod 9, a first rolling member 10, a second rolling member 11, a conveying belt 12 and a supporting rod 13; the first rolling member 10 is arranged at the position of the second through hole 20 through the connecting rod 9; one end of a connecting rod 9 is arranged on the outer wall of the oxidation pond body 1, and the other end of the connecting rod 9 is connected with a first rolling piece 10; the second rolling member 11 is arranged inside the oxidation pond body 1 through a support rod 13; one end of the support rod 13 is arranged at the bottom of the oxidation pond body 1, and the other end of the support rod 13 is connected with the second rolling piece 11; a second power mechanism 21 for driving the first rolling part 10 to rotate is arranged on the oxidation pond body 1; the conveyor belt 12 is an endless belt member, and the conveyor belt 12 is arranged on the outer peripheries of the first rolling member 10 and the second rolling member 11; a plurality of stirring pieces 15 and a plurality of oxidation boxes 16 are arranged on the conveyor belt 12; the stirring pieces 15 and the oxidation boxes 16 are alternately arranged on the conveyor belt 12 in sequence, and the oxidation boxes 16 are positioned between the two stirring pieces 15;
the oxidation pond body 1 is provided with a water outlet 19 and a sewage outlet 25.
In the utility model, the sewage pipe is provided with a plurality of shunt tubes, and the design of the shunt tubes reduces the flow velocity of the sewage, so that the sewage enters the oxidation pond body more gently and uniformly, and the filtering effect of the sewage is improved; due to the design of the rolling column of the filtering device, larger waste residues in the sewage can be intercepted at the filtering device, and the waste residues are conveyed to the waste residue collecting part through the rolling column, so that the sewage purification effect is improved; the filtering screen plate carries out secondary filtering operation on the sewage, smaller impurities can be intercepted by the filtering screen plate, and the sewage after two-layer filtering is subjected to oxidation treatment, so that the oxidation effect is better, and the practicability of the device is improved; the stirring piece and the oxidation box are arranged on the conveyor belt, the stirring piece is used for stirring the sewage, the oxidation effect of the sewage is improved, the oxidizing agent is filled in the oxidation box, and when the oxidation box is conveyed to the position of the second through hole through the conveyor belt, a worker can fill or recover the oxidizing agent at the position, so that the problems that the oxidizing agent cannot be recovered and is difficult to fill are solved, and the practicability of the device is improved; the water outlet is used for discharging the sewage after the oxidation treatment, and the sewage outlet is used for cleaning precipitated impurities such as sludge generated by the oxidation sewage.
In an alternative embodiment, a sewage collecting box 8 for collecting sewage scattered by the conveying device 7 is arranged on the outer wall of the oxidation pond body 1; the sewage collection box 8 is disposed below the second through hole 20.
It should be noted that the sewage collecting box is used for collecting sewage which is possibly scattered in the conveying process of the conveying device, and the pollution to the environment caused by the overflow of the oxidation pond structure for sewage purification is avoided.
In an alternative embodiment, the middle part of the oxidation pond body 1 is provided with a third through hole 26 for inserting the filter screen plate 5; the front end and the rear end of the filter screen plate 5 are respectively an A end and a B end, and the side ends of the filter screen plate 5 are respectively a C end and a D end; two sliding chutes 27 for sliding the C end and the D end of the filter screen plate 5 are arranged in the oxidation pond body 1; the filter screen plate 5 is inserted into the third through hole 26 and is arranged on the sliding groove 27 in a sliding manner; the end A of the filter screen plate 5 is arranged at the position of the third through hole 26, and the end B of the filter screen plate 5 is arranged inside the oxidation pond body 1 and is abutted against the inner wall of the oxidation pond body 1.
It should be noted that, the filter screen plate is inserted into the third through hole and is arranged on the chute in a sliding manner, and the design of the sliding type is convenient for treating the sewage and waste residue remained on the filter screen plate after the filter screen plate is filtered, so that the practicability of the device is improved.
In an alternative embodiment, the mesh openings on the screen plate 5 are smaller than the impurities; a handle 17 is arranged at the A end of the filter screen plate 5.
It should be noted that the sieve pores on the filter screen plate are smaller than the impurities, so that smaller waste residues in the sewage can be filtered, and the sewage treatment effect is improved; the A end of the filter screen plate is provided with the handle, so that the use comfort of the device is improved.
In an alternative embodiment, the supporting rod 13 is a telescopic rod, and the oxidation pond body 1 is provided with a third power mechanism 22 for driving the supporting rod 13 to do telescopic motion.
It should be noted that, the support rod is a telescopic rod, the height of the conveying device can be properly adjusted according to the amount of the sewage, and when the first rolling member and the second rolling member in the conveying device are in the same horizontal line, the sewage directly falls on the conveying belt and is oxidized by the oxidant in the oxidation box, so that the sewage treatment effect is improved.
In an alternative embodiment, the stirring member 15 is a triangular prism; two sides of the stirring member 15 are arc-shaped, and the remaining one side of the stirring member 15 is disposed on the conveyor belt 12.
It should be noted that, two sides of stirring piece are the arcwall face, and when the conveyer belt was moving, stirring piece stirring sewage, sewage was guided to oxidation box position department through the guide effect of arcwall face on the stirring piece, has improved sewage oxidation treatment's effect.
In an alternative embodiment, the drain port 19 is provided in the middle of the oxidation tank body 1; the sewage draining outlet 25 is arranged at the lower part of the oxidation pond body 1.
The oxidation pond comprises an oxidation pond body, a water outlet, a sewage outlet and a sewage outlet, wherein the water outlet is arranged in the middle of the oxidation pond body and used for discharging sewage after oxidation treatment, and the sewage outlet is arranged at the lower part of the oxidation pond body and used for discharging products such as sludge generated after oxidation of the sewage and improving the purification effect of the wastewater.
In an alternative embodiment, the filter device 4 is arranged obliquely inside the oxidation tank body 1, and the height between one end of the filter device 4 at the position of the first through hole 18 and the bottom of the filter tank is lower than that of the other end of the filter device 4.
It should be noted that the filtering device is obliquely arranged inside the oxidation pond body, and waste residues are separated by using gravity, so that energy is saved, and the practicability of the device is improved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (8)
1. An oxidation pond structure for sewage purification is characterized by comprising an oxidation pond body (1) and a plurality of sewage pipes (2); a plurality of sewage pipes (2) are arranged above the oxidation pond body (1); a plurality of shunt pipes (3) are arranged on the sewage pipe (2); the oxidation pond body (1) comprises a filtering device (4), a filtering screen plate (5) and a conveying device (7); a first through hole (18) is formed in the upper part of the oxidation pond body (1), and a second through hole (20) is formed in the middle of the oxidation pond body (1);
the filtering device (4) is arranged inside the oxidation pond body (1); the filtering device (4) comprises a plurality of rolling columns (23) and a fixed frame (24); a plurality of rolling columns (23) are arranged on the fixed frame (24) in a side-by-side rolling manner; gaps are reserved among the rolling columns (23); one end of the fixing frame (24) is arranged on the inner wall of the oxidation pond body (1), and the other end of the fixing frame (24) is arranged at the position of the first through hole (18); one end of the fixing frame (24) positioned at the position of the first through hole (18) extends out of the outer wall of the oxidation pond body (1); a first power mechanism (14) for driving a plurality of rolling columns (23) to roll is arranged on the oxidation pond body (1); a waste residue collecting piece (6) for collecting sewage and residue is arranged on the outer wall of the oxidation pond body (1); the waste residue collecting piece (6) is arranged below the first through hole (18);
the filter screen plate (5) is arranged inside the oxidation pond body (1), and the filter screen plate (5) is arranged in the middle of the oxidation pond body (1);
the conveying device (7) is arranged inside the oxidation pond body (1); the conveying device (7) comprises a connecting rod (9), a first rolling part (10), a second rolling part (11), a conveying belt (12) and a supporting rod (13); the first rolling part (10) is arranged at the position of the second through hole (20) through the connecting rod (9); one end of a connecting rod (9) is arranged on the outer wall of the oxidation pond body (1), and the other end of the connecting rod (9) is connected with a first rolling piece (10); the second rolling piece (11) is arranged inside the oxidation pond body (1) through a support rod (13); one end of the supporting rod (13) is arranged at the bottom of the oxidation pond body (1), and the other end of the supporting rod (13) is connected with the second rolling piece (11); a second power mechanism (21) for driving the first rolling piece (10) to rotate is arranged on the oxidation pond body (1); the conveying belt (12) is an annular belt piece, and the conveying belt (12) is arranged on the peripheries of the first rolling piece (10) and the second rolling piece (11); a plurality of stirring pieces (15) and a plurality of oxidation boxes (16) are arranged on the conveyor belt (12); the stirring pieces (15) and the oxidation boxes (16) are sequentially and alternately arranged on the conveyor belt (12), and the oxidation boxes (16) are positioned between the two stirring pieces (15);
the oxidation pond body (1) is provided with a water outlet (19) and a sewage outlet (25).
2. The oxidation pond structure for purifying the sewage according to the claim 1, wherein the outer wall of the oxidation pond body (1) is provided with a sewage collecting box (8) for collecting the sewage scattered by the conveying device (7); the sewage collecting box (8) is arranged below the second through hole (20).
3. The oxidation pond structure for purifying the sewage according to claim 1, wherein the middle part of the oxidation pond body (1) is provided with a third through hole (26) for inserting the filter screen plate (5); the front end and the rear end of the filter screen plate (5) are respectively an A end and a B end, and the side ends of the filter screen plate (5) are respectively a C end and a D end; two sliding chutes (27) for sliding the C end and the D end of the filter screen plate (5) are arranged in the oxidation pond body (1); the filter screen plate (5) is inserted into the third through hole (26) and is arranged on the chute (27) in a sliding way; the end A of the filter screen plate (5) is arranged at the position of the third through hole (26), and the end B of the filter screen plate (5) is arranged in the oxidation pond body (1) and is abutted against the inner wall of the oxidation pond body (1).
4. An oxidation pond structure for purifying sewage according to claim 3, wherein the mesh openings of the filter mesh plate (5) are smaller than the impurities; a handle (17) is arranged at the A end of the filter screen plate (5).
5. The oxidation pond structure for sewage purification according to claim 1, wherein the support rod (13) is a telescopic rod, and the oxidation pond body (1) is provided with a third power mechanism (22) for driving the support rod (13) to do telescopic motion.
6. The oxidation pond structure for purifying wastewater according to claim 1, wherein the stirring member (15) is a triangular prism; two sides of the stirring piece (15) are arc-shaped surfaces, and the rest one side of the stirring piece (15) is arranged on the conveyor belt (12).
7. The oxidation pond structure for purifying wastewater according to claim 1, wherein the drain port (19) is provided in the middle of the oxidation pond body (1); the drain outlet (25) is arranged at the lower part of the oxidation pond body (1).
8. An oxidation pond structure for sewage purification according to claim 1, characterized in that the filter means (4) is arranged obliquely inside the oxidation pond body (1), and the height between one end of the filter means (4) at the position of the first through hole (18) and the bottom of the filter pond is lower than the other end of the filter means (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921623821.5U CN211339072U (en) | 2019-09-27 | 2019-09-27 | Oxidation pond structure for sewage purification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921623821.5U CN211339072U (en) | 2019-09-27 | 2019-09-27 | Oxidation pond structure for sewage purification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211339072U true CN211339072U (en) | 2020-08-25 |
Family
ID=72135969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921623821.5U Active CN211339072U (en) | 2019-09-27 | 2019-09-27 | Oxidation pond structure for sewage purification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211339072U (en) |
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2019
- 2019-09-27 CN CN201921623821.5U patent/CN211339072U/en active Active
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