Sewage treatment circulating system for aquaculture

Abstract

The invention relates to the technical field of aquaculture, in particular to a sewage treatment circulating system for aquaculture. Comprising a vertical liquid storage tank, a liquid outlet cylinder arranged at the top of the vertical liquid storage tank, a rotating mechanism arranged in the center of the interior of the liquid outlet cylinder, a driving mechanism arranged above the rotating mechanism and a deslagging mechanism arranged in the rotating mechanism. According to the sewage treatment circulating system for aquaculture, after the driving motor is started, an auger in the deslagging mechanism is driven to rotate continuously, and sludge is continuously conveyed out from the bottom of the settling tank under the condition that water feeding is not stopped, so that the continuity of sewage treatment is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture, and in particular to a sewage treatment circulation system for aquaculture. Background Art

[0002] The aquaculture wastewater treatment circulation system is an efficient and environmentally friendly farming model. It uses a series of water treatment units to treat the wastewater generated in the farming pond and recycle it for reuse. The vertical flow sedimentator is a key equipment in the system. It can effectively capture and collect fixed-form pollutants such as leftover bait and feces to prevent them from dissolving and crushing in the water, thereby greatly increasing the burden on subsequent biochemical pools. The importance of the vertical flow sedimentator lies in that it can reduce pollutants at the source, significantly reduce the pressure on subsequent treatment devices such as microfiltration machines, and improve the operating efficiency and stability of the entire system.

[0003] The patent with application number CN202322062335.3 discloses a vertical flow sedimentator, including: a barrel body, which is provided with a water inlet and a water outlet, and the water inlet is connected to a water inlet pipe; a sewage discharge part, which is arranged at the bottom of the barrel body, the sewage discharge part is funnel-shaped, and the diameter of the end connected to the barrel body is larger than the diameter of the end away from the barrel body; a central tube, which is arranged inside the barrel body, and a first baffle is provided in the end of the central tube close to the sewage discharge part, and the edge of the first baffle is connected to the inner wall of the central tube, the middle part of the first baffle is arranged higher than the edge of the first baffle and forms a conical water flow diffusion chamber at the bottom of the first baffle, and a first water outlet hole is also opened on the first baffle, and the water inlet pipe extends into the central tube; a weir assembly is arranged on the outer peripheral side of the central tube, and the weir assembly is configured to overflow the clean water after sedimentation and filtration inside the central tube and discharge it from the water outlet.

[0004] In traditional vertical flow sedimentation tanks, in order to prevent the residue from flowing out with the water flow and ensure the smooth discharge of sludge, it is often necessary to close the water inlet pipe valve. However, this operation will interrupt the sewage treatment process and affect the continuity of sewage treatment. Especially in aquaculture, the continuously generated sewage cannot be treated in time. At the same time, the water flow inside the vertical flow sedimentation tank is balanced and stable, and the sludge mainly relies on its own gravity to settle, which leads to a slow sludge settling speed.

[0005] In view of this, we propose a wastewater treatment circulation system for aquaculture. Summary of the invention

[0006] The purpose of the present invention is to provide a sewage treatment circulation system for aquaculture to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: A sewage treatment circulation system for aquaculture, comprising a vertical liquid storage tank, a liquid discharge cylinder arranged at the top of the vertical liquid storage tank, a rotating mechanism arranged at the center of the liquid discharge cylinder, a driving mechanism arranged above the rotating mechanism, and a slag removal mechanism arranged inside the rotating mechanism; The vertical liquid storage tank comprises a fixed tank body, a plurality of blocking plates regularly arranged on the inner wall of the fixed tank body, and two liquid inlet pipes arranged in parallel; The liquid discharge cylinder comprises a fixed cylinder, a slag guide platform arranged inside the fixed cylinder, an overflow ring arranged outside the slag guide platform, and a connecting plate arranged on the inner cylinder wall of the fixed cylinder; The rotating mechanism comprises a rotating cylinder, a fixed ring gear arranged on the outer wall of the rotating cylinder near the top, and a plurality of cleaning scrapers and spoiler blades rotating with the rotating cylinder; The driving mechanism comprises a fixing part, a driving motor arranged on the top of the fixing part, a transmission part rotating along with the output shaft of the driving motor, and an air blowing part moving in coordination with the transmission part; The fixing part includes a bent frame plate, an air inlet valve arranged on the outer side wall of the bent frame plate, and an air outlet pipe with one end extending to the inside of the fixed tank body; The transmission part includes a rotating shaft, shaft end gears arranged at the upper and lower ends of the rotating shaft, and a fixed cam rotating with the rotating shaft; The air blowing part includes a piston plate whose fixed position changes as the fixed cam rotates, and a pressure spring that pushes the piston plate to move in the direction of the fixed cam through its own elastic force; The slag removal mechanism includes an outer sleeve, a slag discharge pipe integrally formed on the outer wall of the outer sleeve, a filter screen arranged on the outer wall of the outer sleeve, an auger arranged inside the outer sleeve, and a docking gear arranged at the end of the center rod of the auger.

[0008] In the technical solution of the present invention, a sealing cover is threadedly connected to the outer side of the bottom opening of the fixed tank body, the blocking piece is hot-melt connected to the inner wall of the fixed tank body, and the longitudinal cross-section of the liquid inlet pipe is L-shaped and is clamped and fixed to the outer wall of the fixed tank body.

[0009] In the technical solution of the present invention, the fixed cylinder is clamped and fixed on the top surface of the fixed tank body, the slag guiding platform and the overflow ring body are integrally formed with the fixed cylinder body, and the bottom surface of the fixed cylinder is connected to the outer flange of the overflow ring body with a water outlet pipe.

[0010] In the technical solution of the present invention, the top surface of the slag guiding platform presents a sloped structure which gradually descends from the outside to the inside, and a number of regularly distributed table surface through grooves which are connected vertically are provided on the sloped surface of the slag guiding platform, and a number of regularly distributed slag discharge grooves which are connected vertically are provided on the circular ring plate on the bottom surface of the slope of the slag guiding platform, and the two ends of the connecting plate are hot-melt connected to the inside of the fixed cylinder.

[0011] In the technical solution of the present invention, the rotating cylinder is rotatably connected to the outer side of the circular ring plate on the bottom surface of the slope of the slag guide platform, and a cylinder wall ring groove for limiting its rotation range is opened on the outer wall of the rotating cylinder. The fixed ring teeth are clamped and fixed on the outer wall of the rotating cylinder, and the cleaning scraper and spoiler blades are both hot-melt connected to the outer wall of the rotating cylinder.

[0012] In the technical solution of the present invention, the bending frame plate is fixedly connected to the top surface of the fixed cylinder by bolts, a fixed frame is clamped and fixed on the top surface of the bending frame plate, a groove is opened inside the bending frame plate for increasing the sliding range of the air blowing part, the air inlet valve is threadedly connected to the outer wall of the bending frame plate and one end extends to the inside of the groove on the bottom surface of the bending frame plate, the other end of the air outlet pipe extends to the inside of the groove on the bottom surface of the bending frame plate, and the drive motor is fixedly connected to the top surface of the fixed frame by bolts.

[0013] In the technical solution of the present invention, the rotating shaft is coaxially connected to the output shaft of the driving motor and the bottom end is rotatably connected to the top surface of the connecting plate, the shaft end gear and the fixed cam are both clamped and fixed to the rotating shaft, and the shaft end gear located at the bottom is meshed with the fixed ring teeth.

[0014] In the technical solution of the present invention, the piston plate is slidably connected to the inside of the groove on the bottom surface of the bending frame plate, and an external convex rod is clamped and fixed on the outer wall of one end of the piston plate, and the end of the external convex rod is clamped and fixed with a docking pulley that contacts the outer wall of the fixed cam. One end of the pressure spring is adhered to the outer wall of the piston plate, and the other end is adhered to the groove wall of the groove on the bottom surface of the bending frame plate.

[0015] In the technical solution of the present invention, the top end of the outer sleeve is clamped and fixed on the inner bottom surface of the bent frame plate, the slag discharge pipe is integrally formed with the outer sleeve and its internal structure is an inclined distribution form that gradually rises from the outside to the inside.

[0016] In the technical solution of the present invention, the filter screen is clamped and fixed to the inner side of the opening of the outer wall of the outer sleeve, the upper and lower ends of the auger are respectively rotatably connected to the inner bottom surface of the bent frame plate and the top surface of the sealing cover, the top end of the auger center rod extends to above the top surface of the bent frame plate, and the docking gear is clamped and fixed to the top position of the auger center rod, and the docking gear is meshed with the shaft end gear located above.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This sewage treatment circulation system for aquaculture, after the driving motor is started, will drive the auger in the slag removal mechanism to rotate continuously, and without stopping the water inlet, the sludge will be continuously transported out from the bottom of the sedimentation tank, thereby ensuring the continuity of sewage treatment.

[0018] 2. The sewage treatment circulation system used for aquaculture, while the driving motor drives the auger to rotate, will drive the rotating cylinder to rotate through the transmission part, and cooperate with the air blowing part to break the static balance of the water body in the fixed tank, so that the water body produces rotational motion, thereby accelerating the sedimentation process of the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic cross-sectional view of the structure of the vertical liquid storage tank in the present invention; Figure 4 It is a structural schematic diagram of the liquid discharge cylinder in the present invention; Figure 5 It is a structural schematic diagram of the rotating mechanism in the present invention; Figure 6 It is a schematic cross-sectional view of the structure of the driving mechanism in the present invention; Figure 7 It is a schematic cross-sectional view of the structure of the fixing part in the present invention; Figure 8 It is a structural schematic diagram of the transmission part in the present invention; Fig. 9 It is a structural schematic diagram of the air blowing part in the present invention; Fig.10 It is a schematic cross-sectional view of the structure of the slag removal mechanism in the present invention; Fig.11 For the present invention Fig.10 A magnified schematic diagram of part A; Description of reference numerals: 100, vertical liquid storage tank; 110, fixed tank body; 120, sealing cover; 130, blocking plate; 140, liquid inlet pipe; 200, liquid discharge cylinder; 210, fixed cylinder; 220, slag guide platform; 221, table through groove; 222, slag discharge groove; 230, overflow ring; 240, water outlet pipe; 250, connecting plate; 300, rotating mechanism; 310, rotating cylinder; 311, cylinder wall ring groove; 320, fixed ring gear; 330, cleaning scraper; 340, spoiler blade; 400, driving mechanism; 410, fixing part; 411, bending frame plate; 412, fixing frame; 413, air inlet valve; 414, air outlet pipe; 420, driving motor; 430, transmission part; 431, rotating shaft; 432, shaft end gear; 433, fixing cam; 440, air blowing part; 441, piston plate; 442, outer convex rod; 443, docking pulley; 444, pressure spring; 500, slag removal mechanism; 510, outer sleeve; 520, slag discharge pipe; 530, filter screen; 540, auger; 550, docking gear. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 11 As shown, this embodiment provides a technical solution: A sewage treatment circulation system for aquaculture, comprising a vertical liquid storage tank 100, a liquid discharge cylinder 200 arranged at the top of the vertical liquid storage tank 100, a rotating mechanism 300 arranged at the center of the liquid discharge cylinder 200, a driving mechanism 400 arranged above the rotating mechanism 300, and a slag removal mechanism 500 arranged inside the rotating mechanism 300; In this embodiment, Figure 3 As shown, the vertical liquid storage tank 100 includes a fixed tank body 110, a plurality of blocking plates 130 regularly arranged on the inner side wall of the fixed tank body 110, and two liquid inlet pipes 140 arranged in parallel; Specifically, a sealing cover 120 is threadedly connected to the outer side of the bottom opening of the fixed tank body 110 , a blocking piece 130 is hot-melt-connected to the inner wall of the fixed tank body 110 , and a liquid inlet pipe 140 has an L-shaped longitudinal cross-section and is clamped and fixed to the outer wall of the fixed tank body 110 .

[0022] Furthermore, the fixed tank body 110 is used to store sewage and allow the sludge in the internal sewage to settle at its bottom. The sealing cover 120 is used to facilitate regular and thorough cleaning of the interior of the fixed tank body 110. The blocking plate 130 is used to intercept the sludge when the internal water body rotates, thereby cooperating with the water flow to accelerate the sedimentation rate of the sludge. The liquid inlet pipe 140 is used to deliver the aquaculture sewage into the interior of the fixed tank body 110.

[0023] In this embodiment, Figure 4 As shown, the liquid discharge cylinder 200 includes a fixed cylinder 210, a slag guide platform 220 disposed inside the fixed cylinder 210, an overflow ring 230 disposed outside the slag guide platform 220, and a connecting plate 250 disposed on the inner wall of the fixed cylinder 210; Specifically, the fixed cylinder 210 is clamped and fixed on the top surface of the fixed tank body 110, the slag guide platform 220 and the overflow ring 230 are integrally formed with the fixed cylinder 210, and the bottom surface of the fixed cylinder 210 is connected to the outer flange of the overflow ring 230 with a water outlet pipe 240.

[0024] Furthermore, the top surface of the slag guiding platform 220 presents a sloped structure that gradually decreases from the outside to the inside. A number of regularly distributed table through grooves 221 that are connected vertically are provided on the slope surface of the slag guiding platform 220. A number of regularly distributed slag discharge grooves 222 that are connected vertically are provided on the circular ring plate on the bottom surface of the slope of the slag guiding platform 220. The two ends of the connecting plate 250 are hot-melt connected to the inside of the fixed cylinder 210. The horizontal height of the circular ring plate on the bottom surface of the slope of the slag guiding platform 220 is lower than the horizontal height of the top pipe mouth of the liquid inlet pipe 140. The pipe mouth of the liquid inlet pipe 140 is arranged in a central liquid inlet manner, which can ensure that the water flow can be evenly diffused to the surroundings after entering the sedimentator, and is conducive to the suspended matter settling downward under the action of gravity.

[0025] Furthermore, water will flow out from the table groove 221 on the slag guiding platform 220, and when the liquid level is flush with the top of the overflow ring 230, the water will flow into the interior of the fixed cylinder 210, and then enter the subsequent microfiltration machine through the outlet pipe 240 to continue to treat the sewage. The sloped structure of the slag guiding platform 220 is used to allow the sludge to settle in the direction of the slag discharge trough 222, and the connecting plate 250 is used to provide a rotation range for the structure in the rotating mechanism 300.

[0026] In this embodiment, Figure 5 As shown, the rotating mechanism 300 includes a rotating cylinder 310, a fixed ring gear 320 disposed on the outer wall of the rotating cylinder 310 near the top, and a plurality of cleaning scrapers 330 and spoiler blades 340 that rotate together with the rotating cylinder 310; Specifically, the rotating cylinder 310 is rotatably connected to the outer side of the circular ring plate on the slope bottom surface of the slag guide platform 220, and a cylinder wall ring groove 311 is opened on the outer wall of the rotating cylinder 310 for limiting its rotation range, and the fixed ring gear 320 is clamped and fixed on the outer wall of the rotating cylinder 310, and the cleaning scraper 330 and the spoiler blade 340 are both hot-melt connected to the outer wall of the rotating cylinder 310.

[0027] Furthermore, the bottom of the cleaning scraper 330 is in conflict with the top surface of the circular ring plate on the bottom surface of the slope of the slag guide platform 220. After the rotating cylinder 310 rotates, it will also drive the cleaning scraper 330 and the spoiler blade 340 installed above the slag discharge trough 222 to rotate. The cleaning scraper 330 will clean the sludge from the slag discharge trough 222 to the inside of the fixed tank body 110, and the spoiler blade 340 is used to make the water inside the fixed tank body 110 produce a rotational motion.

[0028] In this embodiment, Figure 6-Figure 8 As shown, the driving mechanism 400 includes a fixing portion 410, a driving motor 420 disposed on the top of the fixing portion 410, a transmission portion 430 rotating along with the output shaft of the driving motor 420, and an air blowing portion 440 moving in coordination with the transmission portion 430; Specifically, the fixing portion 410 includes a bent frame plate 411 , an air inlet valve 413 disposed on an outer side wall of the bent frame plate 411 , and an air outlet pipe 414 with one end extending to the interior of the fixed tank body 110 .

[0029] Furthermore, the transmission part 430 includes a rotating shaft 431 , shaft end gears 432 disposed at upper and lower ends of the rotating shaft 431 , and a fixed cam 433 that rotates together with the rotating shaft 431 .

[0030] Furthermore, the bending frame plate 411 is fixedly connected to the top surface of the fixed cylinder 210 by bolts, and a fixed frame 412 is clamped and fixed on the top surface of the bending frame plate 411. A groove is provided inside the bending frame plate 411 for increasing the sliding range of the air blowing part 440. The air inlet valve 413 is threadedly connected to the outer wall of the bending frame plate 411 and one end extends to the inside of the groove on the bottom surface of the bending frame plate 411. The other end of the air outlet pipe 414 extends to the inside of the groove on the bottom surface of the bending frame plate 411, and the drive motor 420 is fixedly connected to the top surface of the fixed frame 412 by bolts.

[0031] Furthermore, the rotating shaft 431 is coaxially connected to the output shaft of the driving motor 420 and the bottom end is rotatably connected to the top surface of the connecting plate 250. The shaft end gear 432 and the fixed cam 433 are both clamped and fixed to the rotating shaft 431, and the shaft end gear 432 located at the bottom is meshed with the fixed ring gear 320.

[0032] Furthermore, the bent frame plate 411 is used to ensure the strength of the overall structure of the fixing portion 410, and the fixing frame 412 is used to provide a fixing platform for the driving motor 420. After the driving motor 420 is started, the rotating shaft 431 in the transmission portion 430 is driven to rotate, thereby driving the upper and lower pieces. Figure 6-Figure 9 As shown, the air blowing part 440 includes a piston plate 441 that changes its fixed position as the fixed cam 433 rotates, and a pressure spring 444 that pushes the piston plate 441 to move toward the fixed cam 433 through its own elastic force; Specifically, the piston plate 441 is slidably connected to the inside of the groove on the bottom surface of the bending frame plate 411, and an outer protrusion 442 is clamped and fixed on the outer wall of one end of the piston plate 441, and the end of the outer protrusion 442 is clamped and fixed with a docking pulley 443 that contacts the outer wall of the fixed cam 433. One end of the pressure spring 444 is adhered to the outer wall of the piston plate 441, and the other end is adhered to the groove wall of the groove on the bottom surface of the bending frame plate 411.

[0033] Furthermore, as the fixed cam 433 rotates, it will continuously change the contact position with the docking pulley 443, and drive the piston plate 441 to move back and forth in the groove on the bottom surface of the bent frame plate 411 through the external convex rod 442, so that the external gas enters the groove on the bottom surface of the bent frame plate 411 through the air inlet valve 413, and is discharged into the interior of the fixed tank body 110 through the air outlet pipe 414. The rotating spoiler blades 340 cause the water inside the fixed tank body 110 to produce a rotational motion, so that the interior of the fixed tank body 110 also has the effect of a cyclone sedimentator, thereby accelerating the sedimentation process of the sludge.

[0034] In this embodiment, Figure 10-11 As shown, the slag removal mechanism 500 includes an outer sleeve 510, a slag discharge pipe 520 integrally formed on the outer wall of the outer sleeve 510, a filter screen 530 disposed on the outer wall of the outer sleeve 510, an auger 540 disposed inside the outer sleeve 510, and a docking gear 550 disposed at the end of the center rod of the auger 540; Specifically, the top end of the outer sleeve 510 is clamped and fixed on the inner bottom surface of the bent frame plate 411, the slag discharge pipe 520 and the outer sleeve 510 are integrally formed, and the internal structure thereof is an inclined distribution shape that gradually rises from the outside to the inside.

[0035] Furthermore, the filter screen 530 is clamped and fixed to the inner side of the opening of the outer wall of the outer sleeve 510, the upper and lower ends of the auger 540 are rotatably connected to the inner bottom surface of the bending frame plate 411 and the top surface of the sealing cover 120 respectively, the top end of the center rod of the auger 540 extends to above the top surface of the bending frame plate 411, and the docking gear 550 is clamped and fixed to the top position of the center rod of the auger 540, and the docking gear 550 is meshed with the shaft end gear 432 located above.

[0036] Furthermore, the shaft end gear 432 located at the top will conflict with the docking gear 550, and continuously drive the auger 540 to rotate, thereby sending the sludge at the bottom of the fixed tank body 110 through the outer sleeve 510 into the interior of the slag discharge pipe 520, thereby discharging the sludge from the interior of the fixed tank body 110, and the filter net 530 is used to filter the aquaculture sewage in the sludge.

[0037] Finally, it should be noted that the drive motor 420 involved in the present invention is a universal standard part or a part known to technical personnel in this field. Its structure and principle can be known to technical personnel through technical manuals or through conventional experimental methods. In the idle space of this device, the drive motor 420 is connected to the external power supply through a wire. The specific connection method should refer to the working principle of the present invention. The electrical connection between each electrical component is completed in a sequential working order, and the detailed connection methods are all well-known technologies in the field.

[0038] When the sewage treatment circulation system for aquaculture of the present invention is used, first, the driving motor 420 in the driving mechanism 400 is started, which drives the rotating shaft 431 in the transmission part 430 to rotate, and then drives the upper and lower shaft end gears 432 and the fixed cam 433 to rotate simultaneously; Then, the shaft end gear 432 located at the bottom will conflict with the fixed ring gear 320 in the rotating mechanism 300, thereby driving the rotating cylinder 310 to rotate, thereby causing the cleaning scrapers 330 and the flow-interfering blades 340 to rotate together with the rotating cylinder 310; As the fixed cam 433 rotates, it will constantly change the contact position with the docking pulley 443, and the piston plate 441 is driven to move back and forth in the groove on the bottom surface of the bent frame plate 411 through the outer convex rod 442, so that the external gas enters the groove on the bottom surface of the bent frame plate 411 through the inlet valve 413, and is discharged into the interior of the fixed tank body 110 through the outlet pipe 414, and the rotating spoiler blades 340 produce a rotational motion in the water body inside the fixed tank body 110, thereby accelerating the sedimentation process of the sludge; Subsequently, the shaft end gear 432 located at the top will conflict with the docking gear 550 in the slag removal mechanism 500, and continuously drive the auger 540 to rotate, thereby sending the sludge at the bottom of the fixed tank body 110 through the outer sleeve 510 into the inside of the slag discharge pipe 520, thereby discharging the sludge from the inside of the fixed tank body 110; Afterwards, the water flow sent in by the liquid inlet pipe 140 flows into the interior of the fixed tank body 110, and flows out to the top of the slag guide table 220 through the table top groove 221. When the liquid level contacts the top of the overflow ring body 230, it flows to the top surface of the fixed cylinder body 210 and is sent to the subsequent microfiltration machine through the outlet pipe 240.

[0039] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. A sewage treatment circulation system for aquaculture, comprising a vertical liquid storage tank (100), a liquid discharge cylinder (200) arranged at the top of the vertical liquid storage tank (100), a rotating mechanism (300) arranged at the center of the liquid discharge cylinder (200), a driving mechanism (400) arranged above the rotating mechanism (300), and a slag removal mechanism (500) arranged inside the rotating mechanism (300); Features: The vertical liquid storage tank (100) comprises a fixed tank body (110), a plurality of blocking plates (130) regularly arranged on the inner side wall of the fixed tank body (110), and two liquid inlet pipes (140) arranged in parallel; The liquid discharge cylinder (200) comprises a fixed cylinder (210), a slag guide platform (220) arranged inside the fixed cylinder (210), an overflow ring (230) arranged outside the slag guide platform (220), and a connecting platform (250) arranged on the inner cylinder wall of the fixed cylinder (210); The rotating mechanism (300) comprises a rotating cylinder (310), a fixed ring tooth (320) arranged on the outer wall of the rotating cylinder (310) near the top, and a plurality of cleaning scrapers (330) and spoiler blades (340) that rotate together with the rotating cylinder (310); The driving mechanism (400) comprises a fixing portion (410), a driving motor (420) arranged on the top of the fixing portion (410), a transmission portion (430) rotating along with the output shaft of the driving motor (420), and an air blowing portion (440) moving in coordination with the transmission portion (430); The fixing portion (410) comprises a bent frame plate (411), an air inlet valve (413) arranged on the outer side wall of the bent frame plate (411), and an air outlet pipe (414) with one end extending to the interior of the fixed tank body (110); The transmission part (430) comprises a rotating shaft (431), shaft end gears (432) arranged at the upper and lower ends of the rotating shaft (431), and a fixed cam (433) that rotates along with the rotating shaft (431); The air blowing part (440) comprises a piston plate (441) whose fixed position changes as the fixed cam (433) rotates, and a pressure spring (444) which pushes the piston plate (441) to move in the direction of the fixed cam (433) through its own elastic force; The slag removal mechanism (500) comprises an outer sleeve (510), a slag discharge pipe (520) integrally formed on the outer wall of the outer sleeve (510), a filter screen (530) arranged on the outer wall of the outer sleeve (510), an auger (540) arranged inside the outer sleeve (510), and a docking gear (550) arranged at the end of the center rod of the auger (540).

2. The sewage treatment circulation system for aquaculture according to claim 1, characterized in that: The outer side of the bottom opening of the fixed tank body (110) is threadedly connected to a sealing cover (120), the blocking piece (130) is hot-melt-connected to the inner side wall of the fixed tank body (110), and the liquid inlet pipe (140) has an L-shaped longitudinal cross-section and is clamped and fixed to the outer side wall of the fixed tank body (110).

3. The sewage treatment circulation system for aquaculture according to claim 1 is characterized in that: The fixed cylinder (210) is fixedly engaged on the top surface of the fixed tank body (110); the slag guide platform (220) and the overflow ring body (230) are integrally formed with the fixed cylinder (210); and the bottom surface of the fixed cylinder (210) is connected to a water outlet pipe (240) at an outer flange of the overflow ring body (230).

4. The sewage treatment circulation system for aquaculture according to claim 1 is characterized in that: The top surface of the slag guiding platform (220) presents a sloped structure that gradually descends from the outside to the inside, a plurality of regularly distributed platform through grooves (221) that are connected vertically are provided on the slope surface of the slag guiding platform (220), a plurality of regularly distributed slag discharge grooves (222) that are connected vertically are provided on a circular ring plate on the bottom surface of the slope of the slag guiding platform (220), and both ends of the connecting platform (250) are hot-melt-connected to the inside of the fixed cylinder (210).

5. The sewage treatment circulation system for aquaculture according to claim 1 is characterized by: The rotating cylinder (310) is rotatably connected to the outer side of a circular ring plate on the bottom surface of the slope of the slag guide platform (220); a cylinder wall ring groove (311) for limiting the rotation range thereof is provided on the outer side wall of the rotating cylinder (310); the fixed ring gear (320) is snap-fitted and fixed to the outer side wall of the rotating cylinder (310); and the cleaning scraper (330) and the spoiler blade (340) are both hot-melt-connected to the outer side wall of the rotating cylinder (310).

6. The sewage treatment circulation system for aquaculture according to claim 1, characterized in that: The bending frame plate (411) is fixedly connected to the top surface of the fixed cylinder (210) by bolts, and a fixed frame (412) is clamped and fixed on the top surface of the bending frame plate (411). A groove for increasing the sliding range of the air blowing part (440) is provided inside the bending frame plate (411). The air inlet valve (413) is threadedly connected to the outer wall of the bending frame plate (411) and one end extends to the inside of the groove on the bottom surface of the bending frame plate (411). The other end of the air outlet pipe (414) extends to the inside of the groove on the bottom surface of the bending frame plate (411). The driving motor (420) is fixedly connected to the top surface of the fixed frame (412) by bolts.

7. The sewage treatment circulation system for aquaculture according to claim 1 is characterized in that: The rotating shaft (431) is coaxially connected to the output shaft of the driving motor (420) and the bottom end is rotatably connected to the top surface of the connecting platen (250). The shaft end gear (432) and the fixed cam (433) are both clamped and fixed to the rotating shaft (431), and the shaft end gear (432) located at the bottom is meshed with the fixed ring gear (320).

8. The sewage treatment circulation system for aquaculture according to claim 1, characterized in that: The piston plate (441) is slidably connected to the inside of the groove on the bottom surface of the bending frame plate (411); an outer convex rod (442) is clamped and fixed on the outer wall of one end of the piston plate (441); the end of the outer convex rod (442) is clamped and fixed with a docking pulley (443) that contacts the outer wall of the fixed cam (433); one end of the pressure spring (444) is adhered to the outer wall of the piston plate (441) and the other end is adhered to the groove wall of the groove on the bottom surface of the bending frame plate (411).

9. The sewage treatment circulation system for aquaculture according to claim 1, characterized in that: The top end of the outer sleeve (510) is clamped and fixed to the inner bottom surface of the bent frame plate (411); the slag discharge pipe (520) is integrally formed with the outer sleeve (510) and its internal structure is an inclined distribution form that gradually rises from the outside to the inside.

10. The sewage treatment circulation system for aquaculture according to claim 2, characterized in that: The filter screen (530) is fixedly connected to the inner side of the opening of the outer wall of the outer sleeve (510); the upper and lower ends of the auger (540) are rotatably connected to the inner bottom surface of the bending frame plate (411) and the top surface of the sealing cover (120), respectively; the top end of the center rod of the auger (540) extends above the top surface of the bending frame plate (411); the docking gear (550) is fixedly connected to the top position of the center rod of the auger (540); and the docking gear (550) is meshed with the shaft end gear (432) located above.

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