Multi-stage purification device for tail water of aquaculture workshop

Abstract

The invention relates to the technical field of sewage treatment, and provides an aquaculture workshop tail water multi-stage purification device which comprises a culture pond and a sedimentation pond and further comprises a drainage pipe, a drainage assembly, a tower body, a purification assembly, a backwashing assembly, a first water pump and a first pipeline. The tower body is arranged on the side portion of the sedimentation tank, the purification assembly is installed in the tower body, the backwashing assembly is installed on the purification assembly, the first water pump is arranged between the culture pond and the sedimentation tank, the first pipeline is communicated with the input end of the first water pump, and the other end of the first pipeline is communicated with the bottom of the culture pond. The problem that in the prior art, normal filtering work can be temporarily stopped in the backwashing process, so that the tail water treatment process is discontinuous, and the tail water treatment efficiency is affected is solved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a multi-stage purification device for tail water of an aquaculture workshop. Background Art

[0002] The multi-stage purification device for aquaculture tail water is a device specially designed to treat and purify tail water generated in the aquaculture process. This device is mainly used to reduce the adverse impact of tail water on the environment and improve the utilization rate of water resources.

[0003] In the process of treating tail water, when the tail water needs to be deeply treated after sedimentation, a sand filter tower will be used. The sand filter tower mainly uses natural quartz sand, manganese sand and anthracite as filter materials to intercept and remove impurities such as suspended matter, colloids and microorganisms in the tail water, thereby ensuring the cleanliness of the water quality supplied to aquaculture and ensuring the healthy growth of fish.

[0004] When the quartz sand or other filter materials inside the sand filter tower have been running for a long time, a large amount of suspended matter, silt, organic matter and other impurities will be intercepted. If they are not cleaned, these impurities will gradually block the gaps in the filter material, hinder the flow of water, and cause the outlet water pressure and flow to decrease, and ultimately affect the outlet water quality. During the backwashing process, first close the water inlet valve and the outlet valve, and then start the backwashing pump or use other water sources to inject backwashing water into the filter. The backwashing water will flush the impurities in the quartz sand layer and discharge them from the filter with the backwashing water. After the backwashing process is over, turn off the backwashing pump or stop injecting backwashing water, and then reopen the water inlet valve and the outlet valve to complete the backwashing. However, since the normal filtering work is generally temporarily stopped during the backwashing process, the tail water treatment process is not continuous, resulting in reduced treatment efficiency and affecting the overall purification effect. Summary of the invention

[0005] The present invention proposes a multi-stage purification device for tail water of an aquaculture workshop, which solves the problem in the related art that the normal filtering work will be temporarily stopped during the backwashing process, making the tail water treatment process discontinuous, thereby affecting the tail water treatment efficiency.

[0006] The technical solution of the present invention is as follows: A multi-stage purification device for tail water in an aquaculture workshop, comprising a culture pond and a sedimentation pond, and also comprising: A drainage pipe, the drainage pipe being connected to the bottom of one side of the sedimentation tank; A drainage assembly, the drainage assembly being installed on the sedimentation tank and used for discharging tail water of the breeding pond into the sedimentation tank; A tower body, wherein the tower body is arranged on the side of the sedimentation tank; A purification component, which is installed inside the tower body and is used to purify the water discharged from the sedimentation tank; Wherein, the purification component comprises a water delivery part, which is installed on the inner top wall of the tower body and is used to deliver tail water into the tower body; A backwash component, which is installed on the purification component and is used to backwash the purification component without affecting filtration; Wherein, the backwash component includes a drainage control unit, which is installed inside the tower body and is used to cooperate with the water supply unit to control the drainage direction.

[0007] Based on the above solution, the drainage assembly includes: a first water pump, wherein the first water pump is disposed between the breeding pond and the sedimentation tank; A first pipeline, wherein the first pipeline is connected to an input end of the first water pump, and the other end of the first pipeline is connected to the bottom of the breeding pond; a second pipeline, wherein the second pipeline is connected to the output end of the first water pump, and the other end of the second pipeline is connected to the upper part of the sedimentation tank; The second drainage part is installed on the sedimentation tank and is used to discharge the tail water after sedimentation into the next link.

[0008] Based on the above solution, the second drainage part includes: a second water pump, the second water pump being arranged on a side of the sedimentation tank away from the first water pump; a third pipeline, the third pipeline being connected to an input end of the second water pump, and the other end of the third pipeline being connected to an upper portion of the sedimentation tank; A fourth pipeline is connected to the output end of the second water pump.

[0009] Based on the above scheme, the purification component includes: A water inlet pipe, the water inlet pipe is fixedly mounted on the tower body and is connected to the fourth pipeline; A water outlet pipe, the water outlet pipe is fixedly mounted on the tower body and is located at the lower part of the water inlet pipe; A first installation shell, two of which are fixedly and symmetrically installed inside the tower body; A second installation shell, two of which are fixedly and symmetrically installed inside the tower body, the two first installation shells and the two second installation shells are arranged alternately, and the first installation shell and the second installation shell are located between the water inlet pipe and the water outlet pipe; Wherein, the water delivery part is used to deliver tail water into the first installation shell and the second installation shell; A filter unit is installed inside the first installation shell and the second installation shell to filter waste water.

[0010] On the basis of the above scheme, the filter unit comprises: A coarse sand layer, wherein the coarse sand layer is disposed inside the two first installation shells, and the coarse sand layer is disposed inside the two second installation shells; A fine sand layer, the upper and lower parts of the coarse sand layer inside the two first installation shells are both provided with the fine sand layer, and the upper and lower parts of the coarse sand layer inside the two second installation shells are both provided with the fine sand layer.

[0011] On the basis of the above scheme, the water delivery unit comprises: A cylinder body, wherein the cylinder body is fixedly mounted on the inner top wall of the tower body; Partitions, two of which are symmetrically and fixedly installed inside the cylinder, the partitions divide the inside of the cylinder into a water inlet chamber, a first water outlet chamber and a second water outlet chamber, the first water outlet chamber is located at the lower part of the water inlet chamber, and the second water outlet chamber is located at the upper part of the water inlet chamber; Wherein, the water inlet pipe is connected with the water inlet cavity; Through holes are provided on the two partitions.

[0012] In addition to the above solutions, it also includes: A first electric cylinder, wherein the first electric cylinder is fixedly mounted on the top of the tower body; A double-headed plug, which is arranged inside the cylinder, is fixedly connected to the output end of the first electric cylinder, and has upper and lower ends respectively adapted to the two through holes; A first water pipe, the tops of the two first installation shells are both connected with the first water pipe, and the two first water pipes are respectively connected with the first water outlet cavity; A second water pipe, the tops of the two second mounting shells are both connected with the second water pipe, and the two second water pipes are respectively connected with the second water outlet cavity.

[0013] On the basis of the above scheme, the backwash component comprises: A drain pipe, the drain pipe is connected to the tower body, and the drain pipe is located at the upper part of the first installation shell and the second installation shell; A water inlet pipe, the water inlet pipe is fixedly mounted on the tower body, and the water discharge pipe is located at the upper part of the first mounting shell and the second mounting shell; A tee, the bottoms of the two first installation shells are connected to the tee, the bottoms of the two second installation shells are connected to the tee, and one of the output ends of the four tees is connected to the water inlet pipe.

[0014] Based on the above solution, the drainage control unit includes: A U-shaped tube, the U-shaped tube is arranged inside the tower body, the U-shaped tube is connected to the water outlet pipe, and the other output ends of the plurality of tees are all connected to the U-shaped tube; A first valve, wherein the first valve is fixedly installed at each position where the plurality of tees are connected to the water inlet pipe; A second valve is fixedly installed at each of the locations where the plurality of tees are connected to the U-shaped tube.

[0015] In addition to the above solutions, it also includes: Drainage grooves, the tops of the two first installation shells and the two second installation shells are all provided with the drainage grooves; Second electric cylinders, four of which are fixedly mounted at equal angles in a circle on the top of the tower body; A sealing plate is fixedly mounted on the output ends of the four second electric cylinders, and the sealing plate is adapted to the drainage groove.

[0016] The working principle and beneficial effects of the present invention are: 1. In the present invention, the tail water is left to settle in the sedimentation tank, the poorer water at the bottom is discharged into the ecological ditch for biological treatment, and can be discharged into the natural environment or reused after being tested and found to meet the standards. The clearer water at the upper layer is discharged into the tower body for treatment, and the treated water can be discharged into the reuse greenhouse, which is used for heat preservation, and then directly reused. The reuse ratio needs to be adjusted according to the actual situation to facilitate the recovery and reuse of the tail water.

[0017] 2. In the present invention, when backwashing the fine sand layer and the coarse sand layer in the first installation shell, the water to be filtered will enter the second installation shell. At this time, the backwash pump or the equipment used for backwashing is connected to the water inlet pipe, the backwashing equipment is started, and the backwashing water is discharged into the water inlet pipe. At this time, the second valve is closed and the first valve is opened. The backwashing water enters the first installation shell through the water inlet pipe and the tee at the bottom of the first installation shell. The backwashed water will be discharged through the drainage groove on the top of the first installation shell and can be discharged through the drain pipe, so that the filtration is not affected during the backwashing process.

[0018] 3. In the present invention, through the cooperation of the drainage component and the purification component, the flow direction of water can be freely changed when the tail water entering the tower body is treated, so as to facilitate the control of the treatment quality of the tail water. Through the setting of the backwash component, the working process of the backwash component does not affect the filtration. Through this alternating filtration and backwashing method, it does not affect the filtration operation, which not only ensures the continuous stability of the purification effect, but also improves the filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure from another angle in the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the cooperation between the second drainage part and the purification component in the present invention; Figure 4 It is a cross-sectional structural schematic diagram of the coordination of the purification component and the backwash component in the present invention; Figure 5 It is a schematic cross-sectional structural diagram of the purification component in the present invention; Figure 6 It is a schematic cross-sectional structure diagram of the water delivery part in the present invention; Figure 7 It is a schematic diagram of the structure of the backwash component in the present invention; Figure 8 It is a schematic diagram of the structure of the cooperation between the second electric cylinder and the sealing plate in the present invention.

[0021] In the figure: 1. breeding pond; 2. sedimentation tank; 3. drain pipe; 4. tower body; 5. first water pump; 6. first pipeline; 7. second pipeline; 8. second water pump; 9. third pipeline; 10. fourth pipeline; 11. water inlet pipe; 12. water outlet pipe; 13. first installation shell; 14. second installation shell; 15. coarse sand layer; 16. fine sand layer; 17. cylinder; 18. partition; 19. through hole; 20. first electric cylinder; 21. double-headed plug; 22. first water pipe; 23. second water pipe; 24. drain pipe; 25. water inlet pipe; 26. tee; 27. U-shaped pipe; 28. first valve; 29. ​​second valve; 30. drain trough; 31. second electric cylinder; 32. sealing plate. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments 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.

[0023] like Figures 1 to 8As shown, this embodiment proposes a multi-stage purification device for tail water of an aquaculture workshop, including a culture pond 1 and a sedimentation tank 2, and also includes a drain pipe 3, a drain assembly, a tower body 4, a purification assembly and a backwash assembly. The drain pipe 3 is connected to the bottom of one side of the sedimentation tank 2, and the drain assembly is installed on the sedimentation tank 2 to discharge the tail water of the culture pond 1 into the sedimentation tank 2. The drain assembly includes a first water pump 5, a first pipeline 6, a second pipeline 7 and a second drainage part. The first water pump 5 is arranged between the culture pond 1 and the sedimentation tank 2, the first pipeline 6 is connected to the input end of the first water pump 5, and the other end of the first pipeline 6 is connected to the bottom of the culture pond 1, the second pipeline 7 is connected to the output end of the first water pump 5, and the other end of the second pipeline 7 is connected to the upper part of the sedimentation tank 2. The second drainage part is installed on the sedimentation tank 2 to discharge the precipitated tail water into the next link.

[0024] Specifically, in the process of treating the tail water, the first water pump 5 is first started to pump the tail water of the breeding pond 1 into the second pipeline 7 through the first pipeline 6, and then transported to the sedimentation tank 2 through the second pipeline 7. The tail water is allowed to settle in the sedimentation tank 2, and the suspended matter gradually settles to the bottom of the tank. The water with poor quality at the bottom layer is discharged into the ecological ditch for biological treatment, and can be discharged into the natural environment or reused after being tested and meeting the standards. The clearer water on the upper layer is discharged into the purification component in the tower body 4 through the second drainage part for treatment. The water treated by the purification component can be discharged into the reuse greenhouse, which is used for insulation, and then directly reused. The reuse ratio needs to be adjusted according to actual conditions. In the process of using the purification component to treat the tail water, when it needs to be backwashed, the second drainage part is started, and the backwashing operation can be performed without stopping the filtration, which not only ensures the continuous and stable purification effect, but also improves the filtration efficiency.

[0025] The above, such as Figure 1 , Figure 2 As shown, the second drainage part includes a second water pump 8, a third pipeline 9 and a fourth pipeline 10. The second water pump 8 is arranged on the side of the sedimentation tank 2 away from the first water pump 5. The third pipeline 9 is connected to the input end of the second water pump 8, and the other end of the third pipeline 9 is connected to the upper part of the sedimentation tank 2. The fourth pipeline 10 is connected to the output end of the second water pump 8.

[0026] Specifically, when the tail water enters the sedimentation tank 2, most of the impurities in the tail water after sedimentation sink back to the bottom of the sedimentation tank 2. At this time, the second water pump 8 is started to pump out the upper layer of clean water after sedimentation through the third pipeline 9, and send it to the fourth pipeline 10, and then enter the purification component in the tower body 4.

[0027] like Figures 3 to 5As shown, the tower body 4 is arranged at the side of the sedimentation tank 2, and the purification component is installed inside the tower body 4 for purifying the water discharged from the sedimentation tank 2. The purification component includes an inlet pipe 11, an outlet pipe 12, a first installation shell 13, a second installation shell 14, a filter part and a water delivery part. The inlet pipe 11 is fixedly installed on the tower body 4, and the inlet pipe 11 is connected to the fourth pipeline 10. The outlet pipe 12 is fixedly installed on the tower body 4, and the outlet pipe 12 is located at the lower part of the inlet pipe 11. Two first installation shells 13 are fixedly and symmetrically installed inside the tower body 4, and two second installation shells 14 are fixedly and symmetrically installed inside the tower body 4. The two first installation shells 13 and the two second installation shells 14 are staggered, and the first installation shell 13 and the second installation shell 14 are located between the inlet pipe 11 and the outlet pipe 12. The first installation shell 13 and the second installation shell 14 are both installed with a filter part for filtering waste water. The water delivery part is installed on the inner top wall of the tower body 4 for delivering tail water into the first installation shell 13 and the second installation shell 14.

[0028] Specifically, when the fourth pipeline 10 transports the precipitated tail water to the water inlet pipe 11, the water entering the water inlet pipe 11 will enter the water delivery part, and the water entering the water delivery part is the same as the end point of controlling the water flow, that is, controlling the water entering the water delivery part to enter the two first installation shells 13 or the two second installation shells 14, thereby realizing the distribution of water flow. For example, the water is first distributed to the two first installation shells 13, and the water is filtered through the filter part. After a period of time, the filter parts in the two first installation shells 13 will gradually be blocked. At this time, the water can be sent to the two second installation shells 14 by switching the water flow through the setting of the water delivery part, and the corresponding filter part is used to continue filtering, and then the filter parts in the two first installation shells 13 are backwashed. Through this alternating filtering and backwashing method, the filtering operation is not affected.

[0029] The above, such as Figure 5 As shown, the filter portion includes a coarse sand layer 15 and a fine sand layer 16. The coarse sand layer 15 is provided inside the two first mounting shells 13, and the coarse sand layer 15 is provided inside the two second mounting shells 14. The upper and lower parts of the coarse sand layer 15 inside the two first mounting shells 13 are provided with fine sand layers 16, and the upper and lower parts of the coarse sand layer 15 inside the two second mounting shells 14 are provided with fine sand layers 16.

[0030] Specifically, after water enters the first installation shell 13 or the second installation shell 14, impurities are effectively trapped through the step-by-step filtration of the coarse sand layer 15 and the fine sand layer 16, thereby purifying the water and ensuring that the water quality meets the required standards.

[0031] The above, such as Figure 6As shown, the water delivery part includes a cylinder 17, a partition 18 and a through hole 19. The cylinder 17 is fixedly mounted on the inner top wall of the tower body 4. Two partitions 18 are symmetrically and fixedly mounted inside the cylinder 17. The partition 18 divides the inside of the cylinder 17 into a water inlet chamber, a first water outlet chamber and a second water outlet chamber. The first water outlet chamber is located at the lower part of the water inlet chamber, and the second water outlet chamber is located at the upper part of the water inlet chamber. The water inlet pipe 11 is connected to the water inlet chamber. Through holes 19 are opened on the two partitions 18. The first electric cylinder 20, the double-headed plug 21, the first water pipe 22 and the second water outlet chamber are also included. and the second water pipe 23, the first electric cylinder 20 is fixedly installed on the top of the tower body 4, the double-headed plug 21 is arranged inside the cylinder 17, the double-headed plug 21 is fixedly connected to the output end of the first electric cylinder 20, the upper and lower ends of the double-headed plug 21 are respectively adapted to the two through holes 19, the tops of the two first installation shells 13 are connected with the first water pipe 22, the two first water pipes 22 are respectively connected with the first water outlet chamber, the tops of the two second installation shells 14 are connected with the second water pipe 23, the two second water pipes 23 are respectively connected with the second water outlet chamber.

[0032] Specifically, when the water entering the water inlet pipe 11 enters the water inlet chamber in the cylinder 17, if the water needs to enter the two first installation shells 13, the first electric cylinder 20 is started, and the first electric cylinder 20 drives the double-headed plug 21 to move upward, blocking the through hole 19 on the upper partition 18 and closing the first electric cylinder 20, so that the water enters the first water outlet chamber through the through hole 19 on the lower partition 18. Through the setting of the first water pipe 22, the water in the first water outlet chamber can be discharged into the first installation shell 13 and processed. After a period of time, when it is necessary to backwash the fine sand layer 16 and the coarse sand layer 15 in the first mounting shell 13, the first electric cylinder 20 is restarted, and the first electric cylinder 20 drives the double-headed plug 21 to move, and the double-headed plug 21 is separated from the through hole 19 of the upper partition 18 and enters the through hole 19 of the lower partition 18. At this time, the water in the water inlet chamber will enter the second water outlet chamber through the through hole 19 of the upper partition 18, and will be discharged into the second mounting shell 14 through the setting of the second water pipe 23, thereby realizing the switching of water flow and ensuring the backwashing effect.

[0033] It should be added that the through hole 19 is set as a conical surface, thereby increasing the contact area with the double-headed plug 21, improving the sealing performance, and avoiding water leakage. At the same time, the conical surface design facilitates the rapid positioning of the double-headed plug 21.

[0034] like Figure 7As shown, the backwash component is installed on the purification component, and is used to backwash the purification component without affecting the filtration. The backwash component includes a drain pipe 24, a water inlet pipe 25, a tee 26 and a drainage control unit. The drain pipe 24 is connected to the tower body 4, and the drain pipe 24 is located on the first installation shell 13 and the upper part of the second installation shell 14. The water inlet pipe 25 is fixedly installed on the tower body 4. The drain pipe 24 is located on the first installation shell 13 and the upper part of the second installation shell 14. The bottoms of the two first installation shells 13 are connected with the tees 26, and the bottoms of the two second installation shells 14 are connected with the tees 26. One of the output ends of the four tees 26 is connected to the water inlet pipe 25. The drainage control unit is installed inside the tower body 4 to control drainage.

[0035] Specifically, when filtering through the fine sand layer 16 and the coarse sand layer 15 in the first installation shell 13, the filtered water will enter the tee 26 at the bottom of the first installation shell 13. Under the action of the drainage control unit, the treated water is discharged into the outlet pipe 12 and discharged into the designated position. When it is necessary to backwash the fine sand layer 16 and the coarse sand layer 15 in the first installation shell 13, the water to be filtered will enter the second installation shell 14. At this time, the backwashing pump or the equipment for backwashing is connected to the water inlet pipe 25, the backwashing equipment is started, and the backwashing water is discharged into the water inlet pipe 25. Through the setting of the drainage control unit, the backwashing water is discharged into the tees 26 at the bottom of the two first installation shells 13 and enters the first installation shell 13. The backwashing water passes through the fine sand layer 16 and the coarse sand layer 15, takes away impurities, and is discharged through the drain pipe 24.

[0036] The above, such as Figure 8 As shown, the drainage control unit includes a U-shaped tube 27, a first valve 28 and a second valve 29. The U-shaped tube 27 is arranged inside the tower body 4, and the U-shaped tube 27 is connected to the water outlet pipe 12. The other output ends of the multiple tees 26 are all connected to the U-shaped tube 27. The positions where the multiple tees 26 are connected to the water inlet pipe 25 are all fixedly installed with the first valve 28, and the positions where the multiple tees 26 are connected to the U-shaped tube 27 are all fixedly installed with the second valve 29. It also includes a drainage groove 30, a second electric cylinder 31 and a sealing plate 32. The tops of the two first mounting shells 13 and the two second mounting shells 14 are all provided with drainage grooves 30. Four second electric cylinders 31 are fixedly installed at equal angles in a circular shape on the top of the tower body 4. The output ends of the four second electric cylinders 31 are all fixedly installed with sealing plates 32, and the sealing plates 32 are adapted to the drainage groove 30.

[0037] Specifically, when the fine sand layer 16 and the coarse sand layer 15 in the first installation shell 13 are used for filtering, the filtered water will enter the interior of the tee 26 at the bottom of the first installation shell 13. At this time, the first valve 28 on the tee 26 in the first installation shell 13 is closed, and the second valve 29 is opened. The water flows out through the U-shaped pipe 27 and enters the outlet pipe 12, and finally converges into the designated position. When backwashing the fine sand layer 16 and the coarse sand layer 15 in the first installation shell 13, the second valve 29 is closed, the first valve 28 is opened, and the backwashing water flows through the inlet pipe 12. The pipe 25 enters the tee 26 at the bottom of the first installation shell 13, and finally enters the interior of the first installation shell 13. The backwashed water will be discharged through the drainage groove 30 at the top of the first installation shell 13. Through the setting of the first electric cylinder 20, each second electric cylinder 31 can be started separately. When it is necessary to backwash the fine sand layer 16 and the coarse sand layer 15 in the first installation shell 13, the second electric cylinder 31 at the top of the first installation shell 13 is retracted, and the backwashed water can be discharged into the upper layer of the tower body 4 and discharged through the drain pipe 24.

[0038] The working principle or usage process of this application is: In the process of treating the tail water, the first water pump 5 is first started to pump the tail water of the breeding pond 1 into the second pipeline 7 through the first pipeline 6, and then transported to the sedimentation tank 2 through the second pipeline 7. The tail water is allowed to settle in the sedimentation tank 2, and the suspended matter gradually settles to the bottom of the tank. The poorer water at the bottom is discharged into the ecological ditch for biological treatment. After being tested and found to meet the standards, it can be discharged into the natural environment or reused. At this time, the second water pump 8 is started to pump out the clearer water in the upper layer after precipitation through the third pipeline 9 and send it to the fourth pipeline 10, and then the water is discharged into the water inlet pipe 11.

[0039] The water entering the water inlet pipe 11 will enter the water inlet chamber in the cylinder 17. Taking the water entering the two first installation shells 13 first as an example, the first electric cylinder 20 is started at this time, and the first electric cylinder 20 drives the double-headed plug 21 to move upward, blocking the through hole 19 on the upper partition 18 and closing the first electric cylinder 20, so that the water enters the first water outlet chamber through the through hole 19 on the lower partition 18. Through the setting of the first water pipe 22, the water in the first water outlet chamber can be discharged into the first installation shell 13, and processed by the coarse sand layer 15 and the fine sand layer 16. The filtered water will enter the inside of the tee 26 at the bottom of the first installation shell 13. At this time, the first valve 28 on the tee 26 in the first installation shell 13 is closed, and the second valve 29 is opened. The water flows out through the U-shaped pipe 27 and enters the water outlet pipe 12, and finally converges into the designated position.

[0040] After a period of time, when it is necessary to backwash the fine sand layer 16 and the coarse sand layer 15 in the first mounting shell 13, restart the first electric cylinder 20, and the first electric cylinder 20 drives the double-headed plug 21 to move, and the double-headed plug 21 disengages from the through hole 19 of the upper partition 18 and enters the through hole 19 of the lower partition 18. At this time, the water in the water inlet chamber will enter the second water outlet chamber through the through hole 19 of the upper partition 18, and will be discharged into the second mounting shell 14 through the setting of the second water pipe 23, thereby realizing the switching of water flow, and continuing to filter through the fine sand layer 16 and the coarse sand layer 15 in the second mounting shell 14.

[0041] When the fine sand layer 16 and the coarse sand layer 15 in the first installation shell 13 need to be backwashed, the water to be filtered will enter the second installation shell 14. At this time, the backwashing pump or the equipment used for backwashing is connected to the water inlet pipe 25, the backwashing equipment is started, and the backwashing water is discharged into the water inlet pipe 25. At this time, the second valve 29 at the corresponding position is closed, and the first valve 28 is opened. The backwashing water enters the tee 26 at the bottom of the first installation shell 13 through the water inlet pipe 25, and finally enters the inside of the first installation shell 13. The backwashed water will pass through the first installation shell 1 3, each second electric cylinder 31 can be started separately through the setting of the first electric cylinder 20. When the fine sand layer 16 and the coarse sand layer 15 in the first installation shell 13 need to be backwashed, the second electric cylinder 31 on the top of the first installation shell 13 is retracted, so that the backwashed water can be discharged into the upper layer of the tower body 4 and discharged through the drain pipe 24. Through this alternating filtering and backwashing method, the filtering operation is not affected, which not only ensures the continuous and stable purification effect, but also improves the filtering efficiency.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage purification device for tail water of an aquaculture workshop, comprising a culture pond (1) and a sedimentation pond (2), characterized in that: Also includes: A drainage pipe (3), the drainage pipe (3) being connected to the bottom of one side of the sedimentation tank (2); a drainage assembly, the drainage assembly being installed on the sedimentation tank (2) and used for discharging tail water from the breeding pond (1) into the sedimentation tank (2); A tower body (4), the tower body (4) being arranged on a side of the sedimentation tank (2); A purification component, the purification component is installed inside the tower body (4) and is used to purify water discharged from the sedimentation tank (2); Wherein, the purification component comprises a water delivery part, which is installed on the inner top wall of the tower body (4) and is used to deliver tail water into the tower body (4); A backwash component, which is installed on the purification component and is used to backwash the purification component without affecting filtration; The backwash component comprises a drainage control unit, which is installed inside the tower body (4) and is used to cooperate with the water supply unit to control the drainage direction.

2. A multi-stage purification device for tail water of an aquaculture workshop according to claim 1, characterized in that: The drainage assembly comprises: a first water pump (5), the first water pump (5) being arranged between the breeding pond (1) and the sedimentation pond (2); a first pipeline (6), the first pipeline (6) being connected to the input end of the first water pump (5), and the other end of the first pipeline (6) being connected to the bottom of the breeding pond (1); a second pipeline (7), the second pipeline (7) being connected to the output end of the first water pump (5), and the other end of the second pipeline (7) being connected to the upper part of the sedimentation tank (2); A second drainage part, the second drainage part is installed on the sedimentation tank (2) and is used to discharge the tail water after sedimentation into the next link.

3. A multi-stage purification device for tail water of an aquaculture workshop according to claim 2, characterized in that: The second drainage part comprises: a second water pump (8), the second water pump (8) being arranged on a side of the sedimentation tank (2) away from the first water pump (5); a third pipeline (9), the third pipeline (9) being connected to the input end of the second water pump (8), and the other end of the third pipeline (9) being connected to the upper part of the sedimentation tank (2); A fourth pipeline (10), the fourth pipeline (10) being connected to an output end of the second water pump (8).

4. A multi-stage purification device for tail water of an aquaculture workshop according to claim 3, characterized in that: The purification component comprises: a water inlet pipe (11), the water inlet pipe (11) being fixedly mounted on the tower body (4), the water inlet pipe (11) being in communication with the fourth pipeline (10); A water outlet pipe (12), the water outlet pipe (12) being fixedly mounted on the tower body (4), the water outlet pipe (12) being located below the water inlet pipe (11); A first installation shell (13), two of which are fixedly and symmetrically installed inside the tower body (4); a second installation shell (14), wherein two second installation shells (14) are fixedly and symmetrically installed inside the tower body (4), the two first installation shells (13) and the two second installation shells (14) are arranged alternately, and the first installation shell (13) and the second installation shell (14) are located between the water inlet pipe (11) and the water outlet pipe (12); The water delivery part is used to deliver tail water into the first installation shell (13) and the second installation shell (14); A filter unit is installed inside the first installation shell (13) and the second installation shell (14) and is used to filter waste water.

5. A multi-stage purification device for tail water of an aquaculture workshop according to claim 4, characterized in that: The filter unit comprises: A coarse sand layer (15), wherein the coarse sand layer (15) is disposed inside the two first mounting shells (13), and the coarse sand layer (15) is disposed inside the two second mounting shells (14); A fine sand layer (16), wherein the upper and lower parts of the coarse sand layer (15) inside the two first installation shells (13) are both provided with the fine sand layer (16), and the upper and lower parts of the coarse sand layer (15) inside the two second installation shells (14) are both provided with the fine sand layer (16).

6. A multi-stage purification device for tail water of an aquaculture workshop according to claim 5, characterized in that: The water delivery unit comprises: A cylinder (17), wherein the cylinder (17) is fixedly mounted on the inner top wall of the tower body (4); baffles (18), two baffles (18) being symmetrically and fixedly mounted inside the cylinder (17), the baffles (18) dividing the inside of the cylinder (17) into a water inlet chamber, a first water outlet chamber and a second water outlet chamber, the first water outlet chamber being located at the lower part of the water inlet chamber, and the second water outlet chamber being located at the upper part of the water inlet chamber; Wherein, the water inlet pipe (11) is connected to the water inlet cavity; A through hole (19), wherein the two partitions (18) are both provided with the through hole (19).

7. The multi-stage purification device for tail water of an aquaculture workshop according to claim 6, characterized in that: Also includes: A first electric cylinder (20), the first electric cylinder (20) being fixedly mounted on the top of the tower body (4); A double-headed plug (21), the double-headed plug (21) being arranged inside the cylinder (17), the double-headed plug (21) being fixedly connected to the output end of the first electric cylinder (20), and the upper and lower ends of the double-headed plug (21) being respectively adapted to the two through holes (19); A first water pipe (22), the tops of the two first installation shells (13) are both connected to the first water pipe (22), and the two first water pipes (22) are respectively connected to the first water outlet cavity; A second water pipe (23), the tops of the two second mounting shells (14) are both connected with the second water pipe (23), and the two second water pipes (23) are respectively connected with the second water outlet cavity.

8. The multi-stage purification device for tail water of an aquaculture workshop according to claim 7, characterized in that: The backwash assembly comprises: a water discharge pipe (24), the water discharge pipe (24) being connected to the tower body (4), the water discharge pipe (24) being located on the upper parts of the first installation shell (13) and the second installation shell (14); A water inlet pipe (25), the water inlet pipe (25) being fixedly mounted on the tower body (4), and the water discharge pipe (24) being located on the upper parts of the first mounting shell (13) and the second mounting shell (14); A tee (26), the bottoms of the two first installation shells (13) are connected to the tee (26), the bottoms of the two second installation shells (14) are connected to the tee (26), and one of the output ends of the four tees (26) is connected to the water inlet pipe (25).

9. The multi-stage purification device for tail water of an aquaculture workshop according to claim 8, characterized in that: The drainage control unit comprises: A U-shaped tube (27), the U-shaped tube (27) being arranged inside the tower body (4), the U-shaped tube (27) being in communication with the water outlet pipe (12), and the other output ends of the plurality of tees (26) being in communication with the U-shaped tube (27); A first valve (28), wherein the first valve (28) is fixedly installed at each of the positions where the plurality of tees (26) are connected to the water inlet pipe (25); A second valve (29), wherein the positions where the plurality of tees (26) are connected to the U-shaped tube (27) are all fixedly installed with the second valve (29).

10. The multi-stage purification device for tail water of an aquaculture workshop according to claim 9, characterized in that: Also includes: A drainage groove (30), wherein the tops of the two first mounting shells (13) and the two second mounting shells (14) are each provided with the drainage groove (30); A second electric cylinder (31), four of which are fixedly mounted at equal angles in a circular shape on the top of the tower body (4); A sealing plate (32), the output ends of the four second electric cylinders (31) are all fixedly mounted with the sealing plate (32), and the sealing plate (32) is adapted to the drainage groove (30).

Images