CN111264456A - Device for purifying suspended particles in flowing water aquaculture water body - Google Patents
Device for purifying suspended particles in flowing water aquaculture water body Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 245
- 238000009360 aquaculture Methods 0.000 title claims abstract description 22
- 244000144974 aquaculture Species 0.000 title claims abstract description 22
- 239000002245 particle Substances 0.000 title claims abstract description 14
- 239000010865 sewage Substances 0.000 claims abstract description 86
- 238000004062 sedimentation Methods 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 31
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 238000000746 purification Methods 0.000 claims abstract description 16
- 241000251468 Actinopterygii Species 0.000 claims abstract description 6
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- 239000010935 stainless steel Substances 0.000 claims description 9
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/045—Filters for aquaria
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- Life Sciences & Earth Sciences (AREA)
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- Marine Sciences & Fisheries (AREA)
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- Biodiversity & Conservation Biology (AREA)
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Abstract
The invention relates to a purification device for suspended particles in a flowing water aquaculture water body, wherein a rotational flow sedimentation tank of the purification device is of a conical inner-outer cylinder structure, and a spiral flow guide device is fixedly arranged on the inner wall of an outer cylinder and is communicated with a water inlet pipe; the bottom of the inner cylinder is connected with the upper end of the sewage collecting and discharging device; the top of the cyclone sedimentation tank is provided with a water collecting device, and the upper overflow water is guided into the arc-shaped sieve filtering device through a water conveying pipeline; the bottom of the cyclone sedimentation tank is provided with a sewage discharge pipe which is connected with the lower end of the sewage collecting and discharging device and used for conveying sediments to an external designated area; a water conveying pipeline of the rotational flow sedimentation tank is connected with a water distribution pipe at the upper end of the sieve bend, a water collecting device is arranged below the sieve bend, and the filtered water returns to the fish pond again or is discharged after reaching the standard; the lower end of the sieve bend is provided with a sewage collecting device consisting of a semicircular sewage collecting groove and a sewage discharge pipe, and sediments filtered by the sieve bend are conveyed to an external designated area through the sewage discharge pipe. The invention can filter organic particles in a large-flow culture discharge water body twice, quickly remove the organic particles and realize efficient reduction and control of running water culture pollution.
Description
Technical Field
The invention relates to a purification device for suspended particles in a running water aquaculture water body, in particular to a purification device for suspended particles in a running water aquaculture water body, and belongs to the field of aquaculture pollution treatment.
Background
The running water culture is one of the important culture modes in China, mainly focuses on areas with good water flow conditions such as mountainous water flow and rivers, and mainly cultures cold water fishes such as salmon and trout and a large amount of fresh water fishes. The running water culture mainly depends on water flow to meet dissolved oxygen and good water environment and the like required by culture, 1 kilogram of fishes cultured need more than 10 cubic meters of water, and the problems of large water consumption, direct discharge of pollutants and the like exist.
The Total Suspended Solids (TSS) in the lost aquaculture water body comprise non-precipitated suspended solids with the diameter of 1-200 mu m suspended in the water body and precipitable suspended solids with the diameter of more than 100 mu m, and mainly comprise organic particles such as residual baits, debris, excrement and the like. In addition, the organic matters dissolved in the water body, ammonia nitrogen, nitrite, nitrate, organic phosphorus and the like are also contained, the culture discharge water body has the characteristics of few pollutant types, small change of content, large water flow and the like, and the discharge requirement can be met by directly adopting a biological method without physical and chemical treatment. At present, the aquaculture wastewater treatment is roughly divided into a physical treatment method, a chemical treatment method, a biological treatment method and the like. Aiming at suspended matters in the culture discharge water body, methods such as filtration, neutralization, adsorption, sedimentation, aeration, membrane separation and the like are mainly adopted. Among them, the physical treatment method mainly uses a solid-liquid separation method, a sieve filtration method, and the like, and although the efficiency is high, the use cost is also high. The oxidative decomposition method has high efficiency, but the use process is easy to cause residual substances and has toxic effect on environmental organisms. The flocculation method is also a method which is used more, but has the defects of secondary pollution, large using amount, high cost and the like. The biological treatment method mainly degrades organic matters and nutrient substances in the water body by utilizing the absorption and metabolism of microorganisms, plants, aquatic animals and the like, but has the defects of low efficiency and slow reaction, and is not suitable for large-flow water body application.
At present, the problems of low purification speed, low efficiency, high facility cost and the like mainly exist in the physical purification of large-flow running water culture under the good running water conditions of mountainous areas, rivers and the like.
Disclosure of Invention
The invention aims to provide a device for purifying suspended particles in a running water aquaculture water body, which comprises rotational flow sedimentation tanks, arc-shaped filtering devices, water control pipelines and the like which are positioned at different levels, is suitable for quickly removing the particles in the large-flow running water aquaculture discharge water body, has the characteristics of low energy consumption, high efficiency, easy installation, simple operation and the like, and can realize the high-efficiency reduction and control of the running water aquaculture discharge pollution.
The invention adopts the following technical scheme:
a device for purifying suspended particles in a flowing water aquaculture water body comprises a rotational flow sedimentation tank 1, a sieve bend filtering device 2 and a water control pipeline 3; the cyclone sedimentation tank 1 is of a conical cylindrical structure and is provided with an outer cylinder 1-1 and an inner cylinder 1-2; a spiral flow guide device 1-3 is arranged on the inner wall of the outer cylinder 1-1, and the outer wall of the outer cylinder is communicated with a water inlet pipeline 3-1 communicated with the culture pond; the bottom of the inner cylinder 1-2 is connected with the upper end of a sewage collecting and discharging device 1-4, the sewage collecting and discharging device 1-4 is of a tubular structure, and a sewage sucking hole 1-4-1 is arranged on the outer wall of the part of the sewage collecting and discharging device, which is positioned between the bottom of the outer cylinder 1-1 and the inner cylinder 1-2; the bottom of the inner cylinder 1-2 is provided with water through holes 1-2-1 in the area at the periphery of the sewage collecting and discharging device 1-4; the upper part of the rotational flow sedimentation tank 1 is provided with a water collecting device 1-5, and the water after rotational flow sedimentation is input into the arc-shaped screen filtering device 2 through a water conveying pipe 3-3. (ii) a The sieve bend filtering device 2 comprises a water distribution device 2-1, a sieve bend 2-2, a sewage collecting device 2-3 and a water collecting device 2-4 which are arranged from top to bottom in sequence; the water inlet of the water distribution device 2-1 is communicated with the water delivery pipe 3-3, and the water outlet is connected with the water distribution pipe 2-1-1 at the upper end of the curved screen 2-2; a water collecting device 2-4 is arranged below the curved screen 2-2, and the filtered water is conveyed to a fishpond through a drain pipe 2-4-1 of the water collecting device 2-4 or is discharged to an external water body after reaching the standard.
Preferably, the sewage collecting device 2-3 is positioned at the tail end of the sieve bend and comprises a sewage collecting groove 2-3-1 and a sewage discharge pipe 2-3-2 communicated with the sewage collecting groove; the water collecting device 2-4 comprises a water collecting tank 2-4-2 and a water collecting pipe 2-4-1 communicated with the water collecting tank.
Preferably, the flow guide device 1-3 is a spiral flow guide plate fixed on the outer cylinder wall from top to bottom and used for guiding water inflow with the water flow rate of 0.3-0.5 m/s.
Preferably, the rotational flow sedimentation tank 1 is in a conical double-barrel structure, the double barrels are fixedly connected through a sewage collecting and discharging device 1-4, and water holes 1-2-1 are formed in the bottom of the inner barrel so that water flow enters the inner barrel from the outer barrel.
Preferably, the outer cylinder 1-1 and the inner cylinder 1-2 are cylinders with a conical structure, and the ratio of the diameter of an upper opening to the depth of the upper opening is not higher than 1: 1.2.
Preferably, the flow guide device 1-3 is a spiral water guide device which is fixed on the inner wall of the outer cylinder from top to bottom, has the width of 20-30 cm, and is made of plastic or stainless steel plate; the sewage collecting and discharging device 1-4 is a sewage collecting perforated pipe 1-4-1 fixed between an outer barrel and an inner barrel at the conical bottom, the height of the sewage collecting and discharging device is 20% -30% of the height of the sedimentation tank, and the diameter of the sewage collecting and discharging device is 100-300 mm.
Preferably, the water collecting device 1-5 consists of an upper overflow weir 1-5-1, a water collecting tray 1-5-2 and a water outlet 1-5-3.
Preferably, the water distribution device 2-1 is a perforated PVC pipe or overflow weir structure with a diameter of 100-150 mm and water distribution holesThe hole distance is 8-10 cm; the sieve bend 2-2 is a stainless steel screen mesh with 80-120 meshes, the inclination angle is 45 degrees, and the water treatment capacity of the sieve bend per meter of section is 30-50 m3/h。
Preferably, the water collecting device 2-4 is a water collecting tank 2-4-1 and a water collecting pipe 2-4-2 which are arranged below the sieve bend, the cross section of the water collecting tank is 2.5 times larger than the cross section of the water distributing pipe, and the diameter of the water collecting pipe 2-4-2 is larger than that of the water distributing pipe; the sewage collecting device 2-3 is positioned at the tail end of the arc screen 2-2 and consists of a semicircular sewage collecting groove 2-3-1 and a sewage discharge pipe 2-3-2, the sewage collecting groove 2-3-1 is formed by processing a PVC pipe or is made of stainless steel, and the radian is not less than 180 degrees; the particles filtered by the sieve bend 2-2 enter the sewage collecting groove 2-3-1 under the action of water flow and gravity and are discharged into a special precipitation treatment area through the sewage discharge pipe 2-3-2.
Preferably, the supports 2-5 of the sieve bend device 2 are of a brick or iron frame structure and are used for supporting and fixing the water distribution pipe 2-1, the sieve bend 2-2, the water collecting device 2-4 and the sewage collecting device 2-3; the water control pipeline 3 comprises a water inlet pipeline 3-1 communicated with the culture pond and a rotational flow sedimentation tankA sewage discharge pipeline 3-2, an arc-shaped filtering device water inlet pipeline 3-3, a sewage discharge pipeline 2-3-2 of an arc-shaped screen filtering device and a water collecting pipe 2-4-2; the water inlet pipeline 3-1 of the rotational flow sedimentation tank is connected with a drainage well/tank of the culture tank and controlled by a cannula,the water level is 5-10 cm higher than the water surface of the sedimentation tank. The water level of the water distribution device 2-1 of the sieve bend filtering device 2 is 1-51-1.5 m lower than that of the water collection device.
The invention has the beneficial effects that:
1) the water purification efficiency is high, and the device is particularly suitable for quickly removing particulate matters in the large-flow running water culture discharged water body;
2) the method has the characteristics of low energy consumption, high efficiency, easy installation, simple operation and the like, and can realize high-efficiency reduction and control of the discharge pollution of the flowing water culture;
3) the device is arranged in a high-low mode, does not need a power mechanism, and is particularly suitable for areas with good water flow conditions such as mountain water flow and river;
drawings
FIG. 1 is a plan view of a suspended particle purifying device for a flowing water culture pond of the present invention.
FIG. 2 is a vertical view of the suspended particle purifying apparatus for a flowing water culture pond of the present invention.
Fig. 3 is a partially enlarged view of fig. 2.
In the figure, 1, a rotational flow sedimentation tank, 2, an arc-shaped sieve device, 3, a water control pipeline, 1-1, an outer cylinder, 1-2, an inner cylinder, 1-3, a flow guide device, 1-4, a sewage collecting and discharging device, 1-5, a water collecting device, 2-1, a water distributing device, 2-2, an arc-shaped sieve, 2-3, a sewage collecting device, 2-4, a water collecting device, 2-5, a bracket, 2-3-1, a sewage collecting tank, 2-3-2, a sewage collecting pipe, 2-4-1, a water collecting groove, 2-4-2, a water discharging pipe, 3-1, a water inlet pipeline communicated with a culture tank, 3-2, a rotational flow sedimentation tank sewage discharging pipeline and 3-3, an arc-shaped filtering device water inlet pipeline are arranged in the water inlet pipeline; 1-4-1 of a sewage sucking hole, 1-2-1 of a water passing hole, 1-5-1 of an overflow weir, 1-5-2 of a water collecting tray, 1-5-3 of a water outlet, 2-1-1 of a water distributing pipe, 2-4-1 of a water discharging pipe, 2-4-2 of a water collecting pipe, 2-3-1 of a sewage collecting tank, 2-3-2 of a sewage discharging pipe.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1-2, a purification device for suspended particulate matters in a flowing water aquaculture water body comprises a rotational flow sedimentation tank 1, an arc-shaped sieve filtering device 2 and a water control pipeline 3; the rotational flow sedimentation tank 1 is in a conical barrel-shaped structure and is provided with an outer barrel 1-1 and an inner barrel 1-2; a spiral flow guide device 1-3 is arranged on the inner wall of the outer cylinder 1-1, and the outer wall of the outer cylinder is communicated with a water inlet pipeline 3-1 communicated with the culture pond; the bottom of the inner cylinder 1-2 is connected with the upper end of a sewage collecting and discharging device 1-4, the sewage collecting and discharging device 1-4 is of a tubular structure, and a sewage sucking hole 1-4-1 is arranged on the outer wall of the part of the sewage collecting and discharging device, which is positioned between the bottom of the outer cylinder 1-1 and the inner cylinder 1-2; the bottom of the inner cylinder 1-2 is provided with water through holes 1-2-1 in the area at the periphery of the sewage collecting and discharging device 1-4; the upper part of the rotational flow sedimentation tank 1 is provided with a water collecting device 1-5, and the water after rotational flow sedimentation is input into the arc-shaped screen filtering device 2 through a water conveying pipe 3-3. (ii) a The arc-shaped screen filtering device 2 comprises a water distribution device 2-1, an arc-shaped screen 2-2, a sewage collecting device 2-3 and a water collecting device 2-4 which are sequentially arranged from top to bottom; the water inlet of the water distribution device 2-1 is communicated with the water delivery pipe 3-3, and the water outlet is connected with the water distribution pipe 2-1-1 at the upper end of the curved screen 2-2; a water collecting device 2-4 is arranged below the curved screen 2-2, and the filtered water is conveyed to a fish pond through a water discharging pipe 2-4-1 of the water collecting device 2-4 or is discharged to an external water body after reaching the standard.
In the embodiment, referring to fig. 1-2, the sewage collecting device 2-3 is positioned at the tail end of the sieve bend and comprises a sewage collecting groove 2-3-1 and a sewage discharge pipe 2-3-2 communicated with the sewage collecting groove; the water collecting device 2-4 comprises a water collecting tank 2-4-2 and a water collecting pipe 2-4-1 communicated with the water collecting tank.
In this embodiment, referring to fig. 1-2, the flow guiding device 1-3 is a spiral flow guiding plate fixed on the outer cylinder wall from top to bottom for guiding the water flow and controlling the water flow rate to be 0.3-0.5 m/s.
In this embodiment, referring to fig. 2, the cyclone sedimentation tank 1 has a conical double-barrel structure, the double barrels are connected and fixed by a sewage collecting and discharging device 1-4, and water holes 1-2-1 are arranged at the bottom of the inner barrel to allow water flow to enter the inner barrel from the outer barrel.
In the embodiment, the outer cylinder 1-1 and the inner cylinder 1-2 are cylinders with conical structures, and the ratio of the diameter of the upper opening to the warp depth of the height is not higher than 1: 1.2.
In the embodiment, referring to fig. 2-3, the flow guide device 1-3 is a spiral water guide device fixed on the inner wall of the outer cylinder from top to bottom, the width of the spiral water guide device is 20-30 cm, and the spiral water guide device is a plastic or stainless steel plate; the sewage collecting and discharging device 1-4 is a sewage collecting perforated pipe 1-4-1 fixed between an outer barrel and an inner barrel at the conical bottom, the height of the sewage collecting and discharging device is 20% -30% of the height of the sedimentation tank, and the diameter of the sewage collecting and discharging device is 100-300 mm.
In this embodiment, referring to fig. 2, the water catchment means 1-5 is composed of an upper overflow weir 1-5-1, a water collection tray 1-5-2 and a water outlet 1-5-3.
In this embodiment, the water distribution device 2-1 is a perforated PVC pipe or overflow weir structure with a diameter of 100-150 mm and water distribution holesThe hole distance is 8-10 cm; the sieve bend 2-2 is a stainless steel sieve mesh with 80-120 meshes, the inclination angle is 45 degrees, and the water treatment capacity of the sieve bend per meter of section is 30-50 m3/h。
In this embodiment, referring to fig. 2, the water collecting device 2-4 is a water collecting tank 2-4-1 and a water collecting pipe 2-4-2 installed below the sieve bend, the cross section of the water collecting tank is 2.5 times larger than that of the water distributing pipe, and the diameter of the water collecting pipe 2-4-2 is larger than that of the water distributing pipe; the sewage collecting device 2-3 is positioned at the tail end of the arc screen 2-2 and consists of a semicircular sewage collecting groove 2-3-1 and a sewage discharge pipe 2-3-2, the sewage collecting groove 2-3-1 is formed by processing a PVC pipe or manufacturing stainless steel, and the radian is not less than 180 degrees; the particles filtered by the sieve bend 2-2 enter the sewage collecting groove 2-3-1 under the action of water flow and gravity and are discharged into a special precipitation treatment area through the sewage discharge pipe 2-3-2.
With continued reference to fig. 2, the bracket 2-5 of the sieve bend device 2 is of a brick or iron frame structure and is used for supporting and fixing the water distribution pipe 2-1, the sieve bend 2-2, the water collecting device 2-4 and the sewage collecting device 2-3; the water control pipeline 3 comprises a water inlet pipeline 3-1 communicated with the culture pond, a sewage discharge pipeline 3-2 of the rotational flow sedimentation pond, a water inlet pipeline 3-3 of the arc-shaped filtering device, a sewage discharge pipeline 2-3-2 of the arc-shaped screen filtering device, a water collecting pipe 2-4-2 and the like; the water inlet pipeline 3-1 of the rotational flow sedimentation tank is connected with a drainage well/tank of the culture tank and controlled by a cannula,the water level is 5-10 cm higher than the water surface of the sedimentation tank. The water level of the water distribution device 2-1 of the sieve bend filtering device 2 is 1-51-1.5 m lower than that of the water collection device.
The device is suitable for quickly removing the particulate matters in the large-flow running water culture discharged water body, has the characteristics of low energy consumption, high efficiency, easy installation, simple operation and the like, and can realize high-efficiency reduction and control of the discharged pollution of the running water culture.
While the preferred embodiments of the present invention have been described, those skilled in the art will appreciate that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a particulate matter purifier suspends in flowing water aquaculture water which characterized in that:
comprises a rotational flow sedimentation tank (1), a curved screen filtering device (2) and a water control pipeline (3);
the cyclone sedimentation tank (1) is of a conical cylindrical structure and is provided with an outer cylinder (1-1) and an inner cylinder (1-2); a spiral flow guide device (1-3) is arranged on the inner wall of the outer cylinder (1-1), and the outer wall of the outer cylinder is communicated with a water inlet pipeline (3-1) communicated with the culture pond; the bottom of the inner cylinder (1-2) is connected with the upper end of a sewage collecting and discharging device (1-4), the sewage collecting and discharging device (1-4) is of a tubular structure, and a sewage sucking hole (1-4-1) is formed in the outer wall of the part between the bottom of the outer cylinder (1-1) and the inner cylinder (1-2); the bottom of the inner cylinder (1-2) is provided with water through holes (1-2-1) in the area which is positioned at the periphery of the sewage collecting and discharging device (1-4); the upper part of the rotational flow sedimentation tank (1) is provided with a water collecting device (1-5), and water after rotational flow sedimentation is input into the arc-shaped screen filtering device (2) through a water conveying pipe (3-3);
the arc-shaped screen filtering device (2) comprises a water distribution device (2-1), an arc-shaped screen (2-2), a sewage collecting device (2-3) and a water collecting device (2-4) which are sequentially arranged from top to bottom; the water inlet of the water distribution device (2-1) is communicated with the water delivery pipe (3-3), and the water outlet is connected with the water distribution pipe (2-1-1) at the upper end of the curved screen (2-2); a water collecting device (2-4) is arranged below the curved screen (2-2), and the filtered water is conveyed to a fish pond or is discharged to an external water body after reaching the standard through a drain pipe (2-4-1) of the water collecting device (2-4).
2. The purification device for suspended particulate matter in a running water aquaculture body as claimed in claim 1, wherein: the sewage collecting device (2-3) is positioned at the tail end of the sieve bend and comprises a sewage collecting groove (2-3-1) and a sewage discharge pipe (2-3-2) communicated with the sewage collecting groove; the water collecting device (2-4) comprises a water collecting tank (2-4-2) and a water collecting pipe (2-4-1) communicated with the water collecting tank.
3. The purification device for suspended particulate matter in a running water aquaculture body as claimed in claim 1, wherein: the flow guide device (1-3) is a spiral flow guide plate fixed on the outer cylinder wall from top to bottom and used for guiding water inflow, and the water flow velocity is 0.3-0.5 m/s.
4. The purification device for suspended particulate matter in a running water aquaculture body as claimed in claim 1, wherein: the cyclone sedimentation tank (1) is of a conical double-barrel structure, the double barrels are fixedly connected through a sewage collecting and discharging device (1-4), and water holes (1-2-1) are formed in the bottom of the inner barrel to enable water flow to enter the inner barrel from the outer barrel.
5. The purification device for suspended particulate matter in a running water aquaculture body as claimed in claim 1, wherein: the outer cylinder (1-1) and the inner cylinder (1-2) are cylinders with conical structures, and the ratio of the diameter of an upper opening to the warp depth of the height is not higher than 1: 1.2.
6. The purification device for suspended particulate matter in a running water aquaculture body as claimed in claim 1, wherein: the flow guide device (1-3) is a spiral water guide device which is fixed on the inner wall of the outer cylinder from top to bottom, has the width of 20-30 cm, and is made of plastic or stainless steel plate; the sewage collecting and discharging device (1-4) is a sewage collecting perforated pipe (1-4-1) fixed between the outer barrel and the inner barrel at the conical bottom, the height of the sewage collecting and discharging device is 20% -30% of the height of the sedimentation tank, and the diameter of the sewage collecting and discharging device is 100-300 mm.
7. The purification device for suspended particulate matter in a running water aquaculture body as claimed in claim 1, wherein: the water collecting device (1-5) consists of an overflow weir (1-5-1) at the upper part, a water collecting tray (1-5-2) and a water outlet (1-5-3).
8. The purification device for suspended particulate matter in a running water aquaculture body as claimed in claim 1, wherein: the water distribution device (2-1) is a perforated PVC pipe or overflow weir structure with the diameter of 100-150 mm and water distribution holesThe hole distance is 8-10 cm; the sieve bend (2-2) is a stainless steel sieve mesh with 80-120 meshes and 45-degree inclination angle, and the water treatment capacity of the sieve bend per meter of section is 30-50 m3/h。
9. The purification device for suspended particulate matter in a running water aquaculture body as claimed in claim 1, wherein: the water collecting device (2-4) is a water collecting tank (2-4-1) and a water collecting pipe (2-4-2) which are arranged below the sieve bend, the cross section of the water tank is 2.5 times larger than the cross section of the water distribution pipe, and the diameter of the water collecting pipe (2-4-2) is larger than that of the water distribution pipe; the sewage collecting device (2-3) is positioned at the tail end of the arc-shaped screen (2-2) and consists of a semicircular sewage collecting groove (2-3-1) and a sewage discharge pipe (2-3-2), the sewage collecting groove (2-3-1) is formed by processing a PVC pipe or is made of stainless steel, and the radian is not less than 180 degrees; the particles filtered by the sieve bend (2-2) enter the sewage collecting groove (2-3-1) under the action of water flow and gravity and are discharged into a special precipitation treatment area through the sewage discharge pipe (2-3-2).
10. The apparatus for purifying suspended particles in a body of flowing water according to claim 1, wherein: the bracket (2-5) of the sieve bend device (2) is of a brick or iron frame structure and is used for supporting and fixing the water distribution pipe (2-1), the sieve bend (2-2), the water collecting device (2-4) and the sewage collecting device (2-3); the water control pipeline (3) comprises a water inlet pipeline (3-1) communicated with the culture pond, a sewage discharge pipe (3-2) of the rotational flow sedimentation pond, a water inlet pipeline (3-3) of the arc-shaped filtering device, a sewage discharge pipe (2-3-2) of the arc-shaped screen filtering device and a water collecting pipe (2-4-2); the water inlet pipeline (3-1) of the rotational flow sedimentation tank is connected with a drainage well/tank of the culture tank and controlled by a cannula,the water level is 5-10 cm higher than the water surface of the sedimentation tank. The water level of the water distribution device (2-1) of the sieve bend filter device (2) is 1-1.5 m lower than that of the water collection device (1-5).
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