CN219950673U - Aquaculture circulating water treatment device - Google Patents
Aquaculture circulating water treatment device Download PDFInfo
- Publication number
- CN219950673U CN219950673U CN202320753001.8U CN202320753001U CN219950673U CN 219950673 U CN219950673 U CN 219950673U CN 202320753001 U CN202320753001 U CN 202320753001U CN 219950673 U CN219950673 U CN 219950673U
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- tank body
- water
- circulating water
- water inlet
- biochemical
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 131
- 238000009360 aquaculture Methods 0.000 title claims abstract description 31
- 244000144974 aquaculture Species 0.000 title claims abstract description 31
- 239000010865 sewage Substances 0.000 claims abstract description 28
- 238000005273 aeration Methods 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000011010 flushing procedure Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 6
- 239000007787 solid Substances 0.000 abstract description 5
- 238000011001 backwashing Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 239000000945 filler Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 241000251468 Actinopterygii Species 0.000 description 4
- 210000003608 fece Anatomy 0.000 description 4
- 239000010871 livestock manure Substances 0.000 description 4
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000007872 degassing Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000238571 Cladocera Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000006041 probiotic Substances 0.000 description 1
- 230000000529 probiotic effect Effects 0.000 description 1
- 235000018291 probiotics Nutrition 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Farming Of Fish And Shellfish (AREA)
Abstract
The utility model relates to the technical field of aquaculture, and provides an aquaculture circulating water treatment device, which comprises a tank body, wherein the tank body is sequentially provided with at least one water outlet pipe, a plurality of biochemical bins and a conical sewage draining bottom from top to bottom; the tank body is also provided with a water inlet pipe penetrating from the top surface of the tank body to the conical sewage draining bottom, and a water outlet gap is arranged between the water inlet pipe and the conical sewage draining bottom; an aeration device is arranged on the conical sewage draining bottom. The tank body is internally provided with a plurality of biochemical bins, the water is sequentially processed by the layers of the biochemical bins from bottom to top through the water inlet pipe, and finally discharged through the water outlet pipe, so that the biochemical treatment purpose of circulating water is achieved, and the treated water quality is improved. The bottom of the tank body is provided with the conical sewage draining bottom, so that solid particles such as excrement in circulating water can be conveniently collected, and then the solid particles such as excrement can be flushed out through the aeration device for backwashing, thereby achieving the sewage discharging purpose.
Description
Technical Field
The utility model relates to the technical field of aquaculture, in particular to an aquaculture circulating water treatment device.
Background
Aquaculture is a production activity under artificial control for the propagation, cultivation and harvesting of aquatic animals and plants, generally comprising the whole process of growing aquatic products from offspring under artificial feeding management, and in a broad sense also comprising the proliferation of aquatic resources.
In the cultivation process, in order to remove factors such as impurities or pollutants in water which are unfavorable for the growth of cultivated aquatic products, the cultivation water (seawater or fresh water) needs to be replaced periodically, and in order to save water resources, the cultivation water is generally circulated by a purification device, so that a high-quality cultivation environment is provided, the survival rate of the cultivated aquatic products and the quality of the aquatic products are ensured, the existing purification device has only one bottom, and the structural integrity of the bottom of the treatment container directly influences the pollution discharge effect, so that the bottom of the existing treatment container is more easily damaged compared with the bottom of the existing treatment container.
The application number is CN201822232704.8, the name is 'biological processor based on aquaculture tail water', the aquaculture tail water can be subjected to degassing, nitration and denitrification reactions to obtain new water through the cooperation of the biological reaction area and the degassing drip filtration area, and the new water is sent to a culture pond through a water outlet, so that the recycling of water resources is realized, and the functional area of the degassing and biochemical reactions is realized, so that the integrated setting of aquaculture tail water treatment is realized. However, this design is a degradation type filtration treatment, and in the case of solid particles of aquatic products and a high-efficiency water circulation treatment, it is difficult to perform the treatment, and thus the treatment efficiency is relatively low and is not suitable for the treatment of water circulation type aquaculture.
Disclosure of Invention
The utility model aims to provide an aquaculture circulating water treatment device, which aims to solve the problems that the efficiency of the existing aquaculture circulating water treatment is relatively low or the quality of the treated water is relatively poor.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the aquaculture circulating water treatment device comprises a tank body, wherein the tank body is sequentially provided with at least one water outlet pipe, a plurality of biochemical bins and a conical sewage draining bottom from top to bottom;
the tank body is also provided with a water inlet pipe penetrating from the top surface of the tank body to the conical dirt discharge bottom, and a water outlet gap is arranged between the water inlet pipe and the conical dirt discharge bottom;
an aeration device is arranged on the conical sewage draining bottom.
Preferably, the water inlet pipe is provided with a plurality of water inlet ends of the water inlet pipe are arranged on the top surface of the tank body.
Preferably, a separation net rack is arranged between the biochemical bin and the adjacent biochemical bin.
Preferably, the water outlet pipe is provided with a grid cover on the water inlet inside the tank body.
Preferably, the aeration device comprises a water supply pipe, a plurality of flushing pieces arranged on the water supply pipe and an electromagnetic valve arranged on a water inlet pipe section of the water supply pipe.
Preferably, an installation gap is arranged between the conical dirt discharging bottom and the bottom plate of the tank body, and a drain pipe of the conical dirt discharging bottom is arranged on the bottom plate or the side plate of the tank body through the installation gap.
Preferably, the tank body is provided with an opening at the biochemical bin position and a sealing door for sealing with the opening.
Preferably, the top surface of the tank body is provided with a window and a window door for covering or opening the window.
Preferably, a preformed hole is formed in the top of the tank body.
After the technical scheme is adopted, compared with the background technology, the utility model has the following advantages:
1. the tank body is internally provided with a plurality of biochemical bins, the water is sequentially processed by the layers of the biochemical bins from bottom to top through the water inlet pipe, and finally discharged through the water outlet pipe, so that the biochemical treatment purpose of circulating water is achieved, and the treated water quality is improved.
2. The bottom of the tank body is provided with the conical sewage draining bottom, so that solid particles such as excrement in circulating water can be conveniently collected, and then the solid particles such as excrement can be flushed out through the aeration device for backwashing, thereby achieving the sewage discharging purpose.
Drawings
FIG. 1 is a schematic view of an aquaculture circulating water treatment apparatus according to the present utility model at a first view angle;
FIG. 2 is a cross-sectional view of an aquaculture circulating water treatment apparatus according to the present utility model at a first perspective;
FIG. 3 is a schematic view of the aquaculture circulating water treatment apparatus according to the present utility model in a second view;
FIG. 4 is a cross-sectional view of an aquaculture circulating water treatment apparatus according to the utility model at a second perspective;
FIG. 5 is a schematic view of an aeration device of an aquaculture circulating water treatment apparatus according to the present utility model.
Reference numerals illustrate:
10. a tank body; 100. a water inlet pipe; 101. a water outlet pipe; 102. a biochemical bin;
103. a conical drain bottom; 104. a partition rack; 105. a mesh cover; 106. a mounting gap;
107. an opening; 108. a window; 109. a window door; 110. a preformed hole;
20. an aeration device; 201. a water supply pipe; 202. a flushing member; 203. a solenoid valve.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, it should be noted that:
the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, and do not denote or imply that the apparatus or elements of the present utility model must have a particular orientation, and thus should not be construed as limiting the utility model.
When an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the utility model will be understood by those skilled in the art according to the specific circumstances.
Examples
Referring to fig. 1, 2, 3 and 4, the present embodiment provides an aquaculture circulating water treatment apparatus, which includes a tank 10, wherein the tank 10 is provided with at least one water outlet pipe 101, a plurality of biochemical bins 102 and a tapered sewage draining bottom 103 from top to bottom in sequence; the tank body 10 is also provided with a water inlet pipe 100 which penetrates from the top surface of the tank body 10 to the conical sewage draining bottom 103, and a water outlet gap is arranged between the water inlet pipe 100 and the conical sewage draining bottom 103; the aeration device 20 is arranged on the conical sewage draining bottom 103, the conical sewage draining bottom 103 is a conical bottom plate, a sewage draining pipe is arranged in the middle of the bottom plate, and the aim of sewage draining is achieved by opening or closing a valve on the sewage draining pipe.
The water circulation in the tank 10 in this embodiment is: the waste water is conveyed to the bottom of the tank body 10 (namely, the position of the conical waste water discharge bottom 103) through the water inlet pipe 100, ammonia nitrogen and nitrite in the water body are decomposed and treated step by step through the plurality of biochemical bins 102, and the nitrifying effect can be carried out on probiotic organisms, so that the purpose of biochemical treatment on tail water and fish manure generated by cultivation is achieved.
Specifically, a filler capable of decomposing ammonia nitrogen and nitrite is placed in the biochemical bin 102, tail water generated by cultivation is further led into the conical sewage draining bottom 103 of the tank body 10, fish manure particles in the tail water directly fall onto the sewage draining bottom of a crime, the tail water flows through a water body, and sequentially passes through the multi-layer biochemical bin 102 from bottom to top to decompose and treat the ammonia nitrogen and nitrite in the tail water, and then is discharged through the water outlet pipe 101 on the top of the tank body 10, so that the purpose of efficient water circulation treatment is achieved.
After a certain period of water circulation treatment, more fish manure can be accumulated on the tapered waste discharge bottom 103; therefore, by opening the aeration device 20 to back flush the tapered waste discharge bottom 103, the water curtain during back flushing can greatly isolate tail water, and simultaneously drain fish manure out of the tank body 10 through the tapered waste discharge bottom 103 to perform uniform collection treatment (the water body in the water body can be decomposed in the tank body 10), so that the practicability is improved.
In this embodiment, a plurality of water inlet pipes 100 are provided, and water inlet ends of the plurality of water inlet pipes 100 are disposed on the top surface of the tank 10. Specifically, for example, two water inlet pipes 100 are provided, one water inlet pipe 100 may be a water inlet pipe 100 for water surface of an aquaculture pond, and the other water inlet pipe 100 may be a water inlet pipe 100 for water bottom of the aquaculture pond. The water inlet pipe 100 for water bottom is provided with a micro-filter (the micro-filter is a screen filter for intercepting fine suspended matters and is provided with a drum-shaped metal frame, the drum rotates around a horizontal shaft, and a supporting net and a working net woven by stainless steel wires (copper wires or chemical fiber wires) are attached to the drum, so that the micro-filter can be used for filtering raw water of a water works and removing plankton such as algae and water fleas, can also be used for filtering industrial water, recycling swimming substances in industrial wastewater, finally treating sewage and the like), and is conveyed into the tank body 10 through the water inlet pipe 100 for biochemical decomposition after being treated by the micro-filter, thereby further improving the water quality treatment effect.
As shown in fig. 2 and 4, in this embodiment, a partition net frame 104 is disposed between the biochemical warehouse 102 and the adjacent biochemical warehouse 102, the partition net frame 104 is a flat plate structure, and grid holes are disposed on the flat plate, so as to form a net frame structure. Therefore, after the biochemical fillers are placed, the flow of tail water can be ensured, meanwhile, the biochemical fillers in different biochemical bins 102 are prevented from being mixed, the effect of hierarchical arrangement is achieved, and therefore the same or different biochemical fillers can be placed in different biochemical bins 102 for use, and the practicability and the flexibility are improved.
As shown in fig. 2, in this embodiment, the water inlet of the water outlet pipe 101 inside the tank 10 is provided with the grid cover 105, and the grid cover 105 can form a good drainage effect at the water outlet pipe 101, and multiple drainage holes in a grid form can increase the biochemical flow of the water body, and simultaneously form a filtering effect, so that the blockage of the water outlet pipe 101 is avoided, and the practicability is improved.
As shown in fig. 5, the aeration apparatus 20 in this embodiment includes a water supply pipe 201, a plurality of flushing members 202 provided on the water supply pipe 201, and a solenoid valve 203 provided on a water inlet pipe section of the water supply pipe 201. Since the flushing members 202 are umbrella-shaped nozzles, when the electromagnetic valve 203 is opened to supply water through the water supply pipe 201, the plurality of flushing members 202 perform spray aeration, and when the tapered waste discharge bottom 103 is opened to discharge sewage, the effect of back flushing the tapered surface of the tapered waste discharge bottom 103 can be obtained.
Meanwhile, the aeration not only enables the liquid in the tank body 10 to be in contact with the air for oxygenation, but also accelerates the transfer of oxygen in the air to the liquid due to the stirring of the liquid, thereby completing the oxygenation purpose; in addition, aeration also prevents the suspension in the tank body 10 from sinking, and strengthens the contact between the organic matters and microorganisms in the tank body 10 and dissolved oxygen, thereby ensuring the oxidative decomposition of the organic matters in sewage under the condition that the microorganisms in the tank body 10 have sufficient dissolved oxygen.
As shown in fig. 2, in this embodiment, an installation gap 106 is provided between the tapered drain bottom 103 and the bottom plate of the tank body 10, and the drain pipe of the tapered drain bottom 103 is disposed on the bottom plate or the side plate of the tank body 10 through the installation gap 106, so that the tapered drain bottom 103 can be protected, collision damage to the tapered drain bottom 103 is avoided, pollution discharge effect is affected, and meanwhile, a space (installation gap 106) between the tapered drain bottom 103 and the bottom plate of the tank body 10 can be used for installing pollution discharge to drain sewage, and the tank body 10 can also be placed in a standing manner, so that practicability is facilitated.
Further, the inclination angle of the bottom plate of the tapered drain bottom 103 may be 6 ° to 12 °, and the larger the inclination angle of the bottom plate, the smaller the bottom space of the bottom plate, and thus the easier the formation of a large amount of pile-up at the bottom, and thus the higher the time frequency of flushing; similarly, the smaller the inclination, the more gentle the bottom plate, and the larger the bottom space, so that the interval time of flushing can be prolonged, namely, the flushing frequency is reduced, and the tank body 10 with different body types and different flushing efficiencies can be matched for use, so that the suitability and the practicability are improved.
As shown in fig. 1, in this embodiment, an opening 107 is provided at a position of the tank body 10 located in the biochemical bin 102, and a sealing door for sealing with the opening 107, so that biochemical fillers can be taken out or placed through the opening 107, and the biochemical fillers do not need to be split and placed from top to bottom, thereby improving convenience of use; when in use, the sealing door is closed, so that the water leakage or water seepage problem of the tank body 10 can not occur.
As shown in fig. 2 and 3, in this embodiment, the top surface of the can body 10 is provided with a window 108 and a window door 109 for covering or opening the window 108, and the design of the window 108 can open the top surface of the can body 10 to view the interior of the can body 10 or to place or take out objects, such as biological fillers, in the can body 10, thereby improving the practicability.
As shown in fig. 2, in this embodiment, a preformed hole 110 is provided at the top of the tank 10, and after the tank 10 is used for a long time, unpleasant smell is easily generated in the tank, and if necessary, the gas accumulated in the tank 10 can be exhausted and bleed through the preformed hole 110; alternatively, a conduit, such as the water supply pipe 201 of the aeration device 20, may be accessed through the preformed hole 110.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.
Claims (9)
1. The aquaculture circulating water treatment device is characterized by comprising a tank body (10), wherein the tank body (10) is sequentially provided with at least one water outlet pipe (101), a plurality of biochemical bins (102) and a conical sewage draining bottom (103) from top to bottom;
a water inlet pipe (100) penetrating from the top surface of the tank body (10) to the conical sewage draining bottom (103) is further arranged on the tank body (10), and a water outlet gap is arranged between the water inlet pipe (100) and the conical sewage draining bottom (103);
an aeration device (20) is arranged on the conical sewage draining bottom (103).
2. An aquaculture circulating water treatment apparatus according to claim 1 wherein: the water inlet pipes (100) are arranged in a plurality, and the water inlet ends of the water inlet pipes (100) are arranged on the top surface of the tank body (10).
3. An aquaculture circulating water treatment apparatus according to claim 1 wherein: a separation net rack (104) is arranged between the biochemical bin (102) and the adjacent biochemical bin (102).
4. An aquaculture circulating water treatment apparatus according to claim 1 wherein: the water outlet pipe (101) is positioned at a water inlet in the tank body (10) and is provided with a grid cover (105).
5. An aquaculture circulating water treatment apparatus according to claim 1 wherein: the aeration device (20) comprises a water supply pipe (201), a plurality of flushing pieces (202) arranged on the water supply pipe (201) and an electromagnetic valve (203) arranged on a water inlet pipe section of the water supply pipe (201).
6. An aquaculture circulating water treatment apparatus according to claim 1 wherein: an installation gap (106) is formed between the conical dirt discharging bottom (103) and the bottom plate of the tank body (10), and a drain pipe of the conical dirt discharging bottom (103) is arranged on the bottom plate or the side plate of the tank body (10) through the installation gap (106).
7. An aquaculture circulating water treatment apparatus according to claim 1 or 3 wherein: an opening (107) and a sealing door for sealing the opening (107) are arranged at the position of the biochemical bin (102) of the tank body (10).
8. An aquaculture circulating water treatment apparatus according to claim 1 wherein: the top surface of the tank body (10) is provided with a window (108) and a window door (109) for covering or opening the window (108).
9. An aquaculture circulating water treatment apparatus according to claim 1 wherein: the top of the tank body (10) is provided with a preformed hole (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320753001.8U CN219950673U (en) | 2023-04-07 | 2023-04-07 | Aquaculture circulating water treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320753001.8U CN219950673U (en) | 2023-04-07 | 2023-04-07 | Aquaculture circulating water treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219950673U true CN219950673U (en) | 2023-11-03 |
Family
ID=88537253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320753001.8U Active CN219950673U (en) | 2023-04-07 | 2023-04-07 | Aquaculture circulating water treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219950673U (en) |
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2023
- 2023-04-07 CN CN202320753001.8U patent/CN219950673U/en active Active
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