CN222042922U - Mariculture water cyclic utilization purifier - Google Patents

Abstract

The utility model discloses a seawater aquaculture water recycling purification device, including a protein separator and a biological purification box, and also including a solid-liquid separation box, a water replenishment filter box and an ultraviolet disinfection box. The seawater aquaculture water recycling purification device of the utility model belongs to the technical field of sewage recycling, has good precipitation and filtration effects on aquaculture water, effectively reduces the sediment in the aquaculture water, ensures that the aquaculture water is fully filtered, and helps to improve the purification efficiency of the aquaculture water.

Description

Mariculture water cyclic utilization purifier

Technical Field

The utility model relates to the technical field of sewage recycling, in particular to a mariculture water recycling and purifying device.

Background

With the improvement of the mariculture technology level and the expansion of market demands, the industrial mariculture in China has rapidly developed in recent 10 years, and the residual baits, chemical residues and the culture biological excretions rich in nitrogen, phosphorus, organic matters and toxic substances contained in the culture wastewater can aggravate the seawater eutrophication degree and water pollution of the adjacent sea areas, and cause the marine ecological problems of harmful red tides and the like, and meanwhile, the water pollution in turn restricts the development of the aquaculture. Thus, the treatment and recycling of aquaculture wastewater is of increasing interest.

The circulating culture mode realizes the recycling of culture water by means of water treatment modes such as physics, chemistry, biology and the like, has the characteristics of water conservation, land conservation, high efficiency, environmental protection and the like, and is considered as one of the sustainable development modes of aquaculture.

In the existing mariculture circulation system, conventional treatment technology includes sedimentation tank, microfilter, protein foam separator, biological purifier, ultraviolet ray disinfection etc. as a mariculture wastewater treatment and cyclic utilization system that patent number CN216073486U discloses, including waste water export and sedimentation storehouse, sedimentation storehouse is cylindrical tubular structure, sedimentation storehouse's lower part is the taper type, be provided with split type filtration in the sedimentation storehouse, sedimentation storehouse is linked together with the waste water export, split type filtration one side is provided with aeration oxygen supply structure, aeration oxygen supply structure's one end stretches into in the filtration storehouse, sedimentation storehouse one side intercommunication has the protein separator, protein separator one side intercommunication has the biological treatment pond, biological treatment pond one side intercommunication has the MBR pond, sedimentation storehouse lower part is provided with the blowoff valve, blowoff valve one end is linked together with sludge drying equipment through the sludge pump. In the technology of the patent, the drain pipe of the sedimentation bin is arranged at the bottom, so that sediment easily flows out of the drain pipe, and excessive sediment in water flowing to the protein separator is caused to influence the purification rate.

Disclosure of utility model

The utility model aims to solve the technical problem of overcoming the defects of the prior art, and aims to provide a mariculture water recycling and purifying device.

In order to achieve the aim, the utility model provides a mariculture water recycling and purifying device, which comprises a protein separator, a biological purifying box, a solid-liquid separating box, a water supplementing filter box and an ultraviolet sterilizing box;

A sedimentation tank and a micro-filtration tank which are separated by a partition plate are arranged in the solid-liquid separation tank, a solid discharge funnel is arranged at the lower part in the sedimentation tank, a filter layer is arranged above the solid discharge funnel, a water inlet barrel which vertically penetrates through the filter layer is arranged in the sedimentation tank, two sides of the top of the water inlet barrel are respectively connected with a cultivation water pipe and a dosing pipe, a rotating shaft is rotatably arranged in the water inlet barrel through a bearing seat, a driving motor which is in transmission connection with the top of the rotating shaft through a belt transmission assembly is arranged on the outer wall of the solid-liquid separation tank, and a stirring rod which extends to the lower part of the filter layer is arranged at the bottom of the rotating shaft;

The top of the micro-filtration tank is provided with a water passing pipe which penetrates through the partition plate and is communicated with the sedimentation tank, an arc-shaped filter screen is arranged in the micro-filtration tank, a water outlet is formed in the pipe wall of the water passing pipe, a solid discharging port which is matched with the bottom end of the arc-shaped filter screen is formed in one end wall of the sedimentation tank, a sand collecting tank which is communicated with the solid discharging port is formed in the outer wall of one end of the sedimentation tank, and a first water outlet pipe is arranged at the bottom of the micro-filtration tank;

The top of the protein separator is provided with a first water inlet which is communicated with the first water outlet pipe through a pipeline, and a water pump is arranged on the pipeline; the bottom of the protein separator is provided with a second water outlet pipe;

The two sides of the bottom of the biological purifying box are provided with a second water inlet and a third water inlet communicated with the second water outlet pipe through a pipeline, an elastic three-dimensional filler is arranged in the biological purifying box, and a third water outlet pipe is arranged at the top of the biological purifying box;

a filtering structure is arranged in the water supplementing filter tank, one end of the water supplementing filter tank is provided with a seawater inlet, and the other end of the water supplementing filter tank is provided with a fourth water outlet pipe communicated with the second water inlet through a pipeline;

An ultraviolet lamp tube assembly is arranged in the ultraviolet disinfection box, one end of the ultraviolet disinfection box is provided with a fourth water inlet communicated with the third water outlet pipe through a pipeline, and the other end of the ultraviolet disinfection box is provided with a purified water outlet.

Preferably, the bottom opening of the row-fixing funnel is connected with a dragon conveyor, the dragon conveyor comprises a row-fixing barrel and a dragon mechanism arranged in the row-fixing barrel, the top of the row-fixing barrel is provided with a connecting pipe connected with the bottom opening of the row-fixing funnel, the row-fixing end of the row-fixing barrel passes through the pool wall of the sedimentation tank, and the row-fixing end of the row-fixing barrel is provided with a valve structure.

Preferably, the mesh of the arc-shaped filter screen is 300 meshes.

Preferably, the water passing pipe is parallel to the circular arc center line of the arc filter screen.

Preferably, the sand collecting tank is internally provided with a guide rod and a screw rod, the screw rod is rotationally connected with the groove walls at the two ends in the sand collecting tank through a bearing, one end outside the sand collecting tank is provided with a motor assembly for driving the screw rod to rotate, the guide rod is sleeved with a sliding block in a sliding manner, the inner side of the sliding block is provided with a brush structure which is adaptive to the cambered surface of the arc-shaped filter screen, and one end bottom of the sand collecting tank is provided with a sewage outlet.

Preferably, the filter layer comprises two parallel arranged mesh plates and a quartz sand structure filled between the two mesh plates, the water inlet cylinder vertically penetrates through the two mesh plates, one mesh plate positioned below is fixedly connected with the tank wall of the sedimentation tank through a bolt structure, the water inlet cylinder is fixedly connected with one mesh plate positioned below, and one mesh plate positioned above is sleeved on the water inlet cylinder.

Preferably, a spiral blade which is matched with the wall of the water inlet barrel is arranged in the middle of the rotating shaft.

Preferably, the water replenishing filter tank is internally provided with a first vertical plate and a second vertical plate which are arranged at intervals, the inner cavity of the water replenishing filter tank is divided into a first filter cavity, a second filter cavity and a third filter cavity by the first vertical plate and the second vertical plate, the top of the first vertical plate is provided with a water gap, the bottom of the second vertical plate is provided with a water gap, the first filter cavity, the second filter cavity and the third filter cavity are internally provided with a plurality of cross plates which are arranged in a staggered manner, the cross plates divide the cavities of the first filter cavity, the second filter cavity and the third filter cavity into circuitous filter channels, the circuitous filter channels are internally provided with filter structures, the filter structures are cobble structures, the first filter cavity is internally provided with a vertical pipe which vertically penetrates through the cross plates, and the seawater inlet is arranged at the top end of the vertical pipe.

Preferably, two positioning vertical rods are arranged in the biological purifying box, grid frames are sleeved on the two positioning vertical rods, elastic three-dimensional packing is arranged in the grid frames, springs respectively abutted to the bottom surface and the top surface of the grid frames are fixedly arranged at the bottom and the top of the positioning vertical rods, and vibrators are arranged on the grid frames.

Advantageous effects

The utility model has the advantages that:

The seawater culture water recycling and purifying device has good sedimentation and filtering effects on culture water, effectively reduces sediment in the culture water, ensures that the culture water is fully filtered, and is beneficial to improving the purification efficiency of the culture water.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is a schematic diagram of the constituent modules of the mariculture water recycling purification device of the utility model;

FIG. 2 is an enlarged plan view of the structure of the solid-liquid separation tank of the present utility model;

FIG. 3 is an enlarged cross-sectional view of the structure of the solid-liquid separation tank of the present utility model;

FIG. 4 is an enlarged cross-sectional view of the structure in the direction A-A of FIG. 2;

FIG. 5 is an enlarged cross-sectional view of the filter layer and inlet cartridge of the present utility model;

FIG. 6 is an enlarged top view of the structure of the ultraviolet disinfection box according to the present utility model;

FIG. 7 is an enlarged top view of the biological purification tank of the present utility model;

FIG. 8 is an enlarged top view of the structure of the water replenishment filter tank in the present utility model;

FIG. 9 is a flow chart of the sewage treatment of the mariculture water recycling and purifying device of the utility model.

Wherein: 1. a protein separator; 2. a biological purification tank; 3. a solid-liquid separation tank; 4. a water supplementing filter box; 5. an ultraviolet disinfection box; 6. a sedimentation tank; 7. a micro-filter tank; 8. a solid discharge funnel; 9. a filter layer; 10. a water inlet cylinder; 11. a cultivation water pipe; 12. a dosing tube; 13. a rotating shaft; 14. a driving motor; 15. a stirring rod; 16. a water passing pipe; 17. arc-shaped filter screen; 18. a fixed port is arranged; 19. a sand collecting groove; 20. a first water outlet pipe; 21. a first water inlet; 22. a second water outlet pipe; 23. a second water inlet; 24. a third water inlet; 25. elastic three-dimensional filler; 26. a third water outlet pipe; 27. an ultraviolet lamp tube assembly; 28. a fourth water inlet; 29. a dragon conveyor; 30. a discharging and fixing barrel; 31. a dragon mechanism; 32. a guide rod; 33. a screw rod; 34. a slide block; 35. a brush structure; 36. a screen plate; 37. a quartz sand structure; 38. a helical blade; 39. a first riser; 40. a second riser; 41. a cross plate; 42. a standpipe; 43. positioning a vertical rod; 44. a grid frame; 45. a spring; 46. a vibrator; 47. a motor assembly; 48. a fourth water outlet pipe; 49. a seawater inlet; 50. cobblestone structure.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. Hereinafter, an embodiment of the present utility model will be described in accordance with its entire structure.

The specific embodiments of the present utility model are as follows:

Referring to fig. 1-9, the mariculture water recycling and purifying device comprises a protein separator 1, a biological purifying box 2, a solid-liquid separating box 3, a water supplementing filter box 4 and an ultraviolet sterilizing box 5;

A sedimentation tank 6 and a micro-filtration tank 7 which are separated by a partition plate are arranged in the solid-liquid separation tank 3, a solid discharge funnel 8 is arranged at the lower part in the sedimentation tank 6, a filtration layer 9 is arranged above the solid discharge funnel 8, a water inlet barrel 10 which vertically penetrates through the filtration layer 9 is arranged in the sedimentation tank 6, two sides of the top of the water inlet barrel 10 are respectively connected with a cultivation water pipe 11 and a dosing pipe 12, a rotating shaft 13 is rotatably arranged in the water inlet barrel 10 through a bearing seat, the bearing seat is detachably arranged in the water inlet barrel 10, a driving motor 14 which is in transmission connection with the top of the rotating shaft 13 through a belt transmission assembly is arranged on the outer wall of the solid-liquid separation tank 3, and a stirring rod 15 which extends to the lower part of the filtration layer 9 is arranged at the bottom of the rotating shaft 13;

The top of the micro-filtration tank 7 is provided with a plurality of water passing pipes 16 which penetrate through the partition plates and are communicated with the sedimentation tank 6, the micro-filtration tank 7 is internally provided with an arc-shaped filter screen 17, the pipe wall of the water passing pipe 16 is provided with water outlets, one end wall of the sedimentation tank 6 is provided with a solid discharging port 18 which is matched with the bottom end of the arc-shaped filter screen 17, the outer wall of one end of the sedimentation tank 6 is provided with a sand collecting tank 19 which is communicated with the solid discharging port 18, and the bottom of the micro-filtration tank 7 is provided with a first water outlet pipe 20;

The top of the protein separator 1 is provided with a first water inlet 21, the first water inlet 21 is communicated with the first water outlet pipe 20 through a pipeline, and a water pump is arranged on the pipeline; the bottom of the protein separator 1 is provided with a second water outlet pipe 22; the protein separator is water treatment equipment for removing solid suspended matters in water by an air floatation separation principle; after a large number of tiny bubbles are manufactured in a reaction barrel of the device, the bubbles slowly rise under the action of buoyancy; because the air level of the air bubble contacted with the liquid has a considerable surface tension, the small air bubble can absorb substances such as solid suspended matters, viscous colloid and the like in water; a high concentration of contaminated foam is then formed at the top end of the protein separator. The foam carries the solid suspended matters to form high-concentration sewage under the defoaming effect of the atomizing nozzle through the sewage discharge pipe, so that the effect of solid-liquid separation is achieved;

The two sides of the bottom of the biological purifying box 2 are provided with a second water inlet 23 and a third water inlet 24 communicated with the second water outlet pipe 22 through a pipeline, an elastic three-dimensional filler 25 is arranged in the biological purifying box 2, the elastic three-dimensional filler 25 is an elastic biological filler, and the top of the biological purifying box 2 is provided with a third water outlet pipe 26; the elastic three-dimensional filler 25 in the biological purifying box 2 removes pollutants in water by adsorption, absorption, ingestion, digestion and the like, removes nutrient substances such as nitrogen, phosphorus and the like, and particularly oxidizes and decomposes organic substances through metabolic activity of microorganisms to convert the organic substances into inorganic substances.

A filtering structure is arranged in the water supplementing filter tank 4, a seawater inlet 49 is arranged at one end of the water supplementing filter tank 4, and a fourth water outlet pipe 48 communicated with the second water inlet 23 through a pipeline is arranged at the other end of the water supplementing filter tank 4;

An ultraviolet lamp tube assembly 27 is arranged in the ultraviolet disinfection box 5, a fourth water inlet 28 communicated with the third water outlet tube 26 through a pipeline is arranged at one end of the ultraviolet disinfection box 5, and a purified water outlet is arranged at the other end of the ultraviolet disinfection box 5.

The mariculture water recycling and purifying device is characterized in that the culture wastewater is subjected to precipitation and preliminary filtration treatment through a precipitation tank 6 of a solid-liquid separation tank 3; then, the wastewater flowing in from the water pipe 16 is filtered again through the micro-filter 7 to remove tiny particles in the wastewater; the wastewater is then sent to a protein separator 1 to remove various granular dirt and soluble organic matters mixed in the water; then, the culture water is conveyed to a biological purifying box 2 for biological purifying treatment, and a water supplementing filtering box 4 is arranged for filtering newly extracted seawater and then conveying the seawater to the biological purifying box 2 for purifying treatment, so that the culture water is supplemented; finally, the purified culture water is disinfected by an ultraviolet disinfection box 5, and the disinfected culture water can be conveyed into a culture pond after aeration oxygenation, salinity and pH value adjustment and water temperature adjustment.

In the mariculture water recycling and purifying device, a solid discharge funnel 8, a filter layer 9, a water inlet tube 10, a culture water tube 11 and a dosing tube 12 are arranged in a sedimentation tank 6 of a solid-liquid separation box 3, a flocculating agent and a coagulant aid are added through the dosing tube 12 to carry out coagulant aid treatment on culture water entering the upper part of the solid discharge funnel 8, sedimentation is quickened, the filter layer 9 filters the culture water which is sedimented, the culture water which is sedimented overflows into a micro-filtration tank 7 from a water passing tube 16 above, and the culture water is filtered again, so that sediment in the culture water is effectively reduced, the culture water is fully filtered, and the purification efficiency of the culture water is improved.

Further, the bottom opening of the row-fixing funnel 8 is connected with a dragon conveyor 29, the dragon conveyor 29 comprises a row-fixing barrel 30 and a dragon mechanism 31 arranged in the row-fixing barrel 30, a connecting pipe connected with the bottom opening of the row-fixing funnel 8 is arranged at the top of the row-fixing barrel 30, the row-fixing end of the row-fixing barrel 30 passes through the pool wall of the sedimentation pool 6, and the row-fixing end of the row-fixing barrel 30 is provided with a valve structure. In this embodiment, the sediment in the culture water is collected in the solid discharge cylinder 30 at the bottom of the solid discharge funnel 8, and the solid particle sediment is discharged through the dragon mechanism 31.

Further, the mesh of the arc-shaped filter screen 17 is 300 meshes, and according to practical situations, a bolting silk screen and filter cotton can be adopted.

Further, the water passing pipe 16 is parallel to the circular arc center line of the arc filter screen 17, the number of water passing pipes 16 may be plural, the water passing pipes 16 are arranged above the arc filter screen 17 in a transverse arrangement, and the culture water after precipitation flows out from the water outlet holes of the water passing pipes 16.

Further, be equipped with guide bar 32 and lead screw 33 in the sand collecting tank 19, lead screw 33 pass through the bearing with both ends cell wall rotation in the sand collecting tank 19 is connected, the outer one end of sand collecting tank 19 is equipped with the drive lead screw 33 pivoted motor assembly 47, the slip cap be equipped with on the guide bar 32 lead screw 33 threaded connection's slider 34, slider 34's inboard be equipped with the brush structure 35 that arc filter screen 17's cambered surface suited, slider 34's bottom also be equipped with the tank bottom of sand collecting tank 19 suited brush, the one end bottom of sand collecting tank 19 is equipped with the drain.

In this embodiment, the solid particles obtained by filtering the cultivation water by the arc-shaped filter sieve 17 flow from the arc-shaped filter sieve 17 to the sand collecting tank 19, are discharged from the sewage outlet, and are driven by the motor assembly 47 to rotate the screw rod 33 to drive the slide block 34 to tightly slide the guide rod 32, and the brush structure 35 on the slide block 34 cleans the upper surface of the arc-shaped filter sieve 17, so that the meshes of the arc-shaped filter sieve 17 are prevented from being blocked, and the filtering speed is ensured.

Further, the filter layer 9 includes two parallel net plates 36 and a quartz sand structure 37 filled between the two net plates 36, the water inlet tube 10 vertically passes through the two net plates 36, one net plate 36 at the lower part is fixedly connected with the wall of the sedimentation tank 6 through a bolt structure, the water inlet tube 10 is fixedly connected with one net plate 36 at the lower part, and the other net plate 36 at the upper part is sleeved on the water inlet tube 10. The net plate 36, the water inlet cylinder 10 and the like are detachably arranged in the sedimentation tank 6.

Further, a spiral vane 38 adapted to the wall of the water inlet barrel 10 is arranged in the middle of the rotating shaft 13, a sleeve slidably connected with the rotating shaft 13 is arranged on the spiral vane 38, a sliding groove axially extending is arranged on the rotating shaft 13, a sliding key adapted to the sliding groove is arranged on the inner wall of the sleeve, the rotating shaft 13 and the sleeve are slidably mounted through the sliding key and the sliding groove, and the sleeve is axially limited with the rotating shaft 13 through a screw structure. The driving motor 14 can drive the rotating shaft 13 to rotate, drives the stirring rod 15 and the helical blades 38 to rotate, stirs the culture water and the flocculant, so that the culture water and the flocculant are uniformly mixed, and the precipitation efficiency is improved.

Further, be equipped with first riser 39, second riser 40 of interval arrangement in the moisturizing rose box 4, first riser 39, second riser 40 separate moisturizing rose box 4 inner chamber into first filter chamber, second filter chamber, third filter chamber, the top of first riser 39 is equipped with the mouth of a river, the bottom of second riser 40 is equipped with the mouth of a river, all be equipped with a plurality of ragged cross plates 41 of arranging in first filter chamber, second filter chamber, the third filter chamber, a plurality of the cross plates 41 will first filter chamber, second filter chamber, the cavity of third filter chamber separate for circuitous filtration passageway, be equipped with filtration in the circuitous filtration passageway, filtration is cobble structure 50, be equipped with in the first filter chamber and pass perpendicularly standpipe 42 that diaphragm 41 set up, sea water import 49 is located the standpipe top 42. The first filter cavity, the second filter cavity and the third filter cavity in the water supplementing filter tank 4 are internally provided with circuitous filter channels, so that the sedimentation time of solid particles in seawater can be prolonged, and the cobblestone structure 50 in the circuitous filter channels can effectively filter the seawater and also can set the filter structure as activated carbon.

Further, two positioning vertical rods 43 are arranged in the biological purifying box 2, grid frames 44 are sleeved on the two positioning vertical rods 43, elastic three-dimensional packing 25 is arranged in the grid frames 44, springs 45 respectively abutted to the bottom surface and the top surface of the grid frames 44 are fixedly arranged at the bottom and the top of the positioning vertical rods 43, and vibrators 46 are arranged on the grid frames 44. In this embodiment, the vibrator 46 can vibrate the grid frame 44 up and down, so as to improve the purifying efficiency of the elastic solid packing 25 on the culture water in the biological purifying tank 2.

The working principle is as follows:

Extracting the culture tail water in the culture pond into a sedimentation pond 6 of the solid-liquid separation box 3 by a water suction pump for sedimentation treatment, and filtering by a micro-filtration pond 7 of the solid-liquid separation box 3; then the purified water is conveyed to a protein separator 1 by a water pump for purification treatment; then the waste water is conveyed into a biological purifying box 2 for further microorganism purification; on the other side, seawater is pumped into the water supplementing filter tank 4 by a water pump to be precipitated and filtered and then is also conveyed into the biological purifying tank 2 to be purified; finally, the culture water is conveyed to an ultraviolet disinfection box 5 for disinfection, and the culture water can be conveyed to a culture pond after aeration oxygenation, salinity and pH value adjustment and water temperature adjustment.

The foregoing description of specific exemplary embodiments of the utility model has been presented for the purpose of illustration and description, but it is not intended to limit the utility model to the precise form disclosed, and it is apparent that many changes and modifications may be made in accordance with the above teachings, and while embodiments of the utility model have been shown and described, this specific embodiment is merely illustrative of the utility model and not restrictive, the particular features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner, the exemplary embodiments being selected and described for the purpose of explaining the specific principles of the utility model and its practical application, so that modifications, substitutions, variations, and various other changes may be made to the embodiments without creatively departing from the principles and spirit of the utility model as desired by those skilled in the art without departing from the scope of the patent claims.

Claims (9)

1. The mariculture water recycling and purifying device comprises a protein separator (1) and a biological purifying box (2), and is characterized by further comprising a solid-liquid separating box (3), a water supplementing filter box (4) and an ultraviolet sterilizing box (5);

A sedimentation tank (6) and a micro-filtration tank (7) which are separated by a partition plate are arranged in the solid-liquid separation tank (3), a solid discharge funnel (8) is arranged at the lower part in the sedimentation tank (6), a filtration layer (9) is arranged above the solid discharge funnel (8), a water inlet cylinder (10) which vertically penetrates through the filtration layer (9) is arranged in the sedimentation tank (6), two sides of the top of the water inlet cylinder (10) are respectively connected with a cultivation water pipe (11) and a dosing pipe (12), a rotating shaft (13) is rotatably arranged in the water inlet cylinder (10) through a bearing seat, a driving motor (14) which is in transmission connection with the top of the rotating shaft (13) through a belt transmission assembly is arranged on the outer wall of the solid-liquid separation tank (3), and a stirring rod (15) which extends to the lower part of the filtration layer (9) is arranged at the bottom of the rotating shaft (13);

The top of the micro-filtration tank (7) is provided with a water passing pipe (16) which penetrates through the partition board and is communicated with the sedimentation tank (6), the micro-filtration tank (7) is internally provided with an arc-shaped filter screen (17), the pipe wall of the water passing pipe (16) is provided with a water outlet, one end of the sedimentation tank (6) is provided with a solid discharging port (18) which is matched with the bottom end of the arc-shaped filter screen (17), the outer wall of one end of the sedimentation tank (6) is provided with a sand collecting tank (19) which is communicated with the solid discharging port (18), and the bottom of the micro-filtration tank (7) is provided with a first water outlet pipe (20);

The top of the protein separator (1) is provided with a first water inlet (21), the first water inlet (21) is communicated with the first water outlet pipe (20) through a pipeline, and a water pump is arranged on the pipeline; the bottom of the protein separator (1) is provided with a second water outlet pipe (22);

The two sides of the bottom of the biological purifying box (2) are provided with a second water inlet (23) and a third water inlet (24) communicated with the second water outlet pipe (22) through a pipeline, an elastic three-dimensional filler (25) is arranged in the biological purifying box (2), and the top of the biological purifying box (2) is provided with a third water outlet pipe (26);

A filtering structure is arranged in the water supplementing filter tank (4), one end of the water supplementing filter tank (4) is provided with a seawater inlet, and the other end of the water supplementing filter tank (4) is provided with a fourth water outlet pipe communicated with the second water inlet (23) through a pipeline;

An ultraviolet lamp tube assembly (27) is arranged in the ultraviolet disinfection box (5), a fourth water inlet (28) communicated with the third water outlet tube (26) through a pipeline is formed in one end of the ultraviolet disinfection box (5), and a purified water outlet is formed in the other end of the ultraviolet disinfection box (5).

2. The mariculture water recycling and purifying device according to claim 1, wherein a dragon conveyor (29) is connected to the bottom opening of the row-fixing funnel (8), the dragon conveyor (29) comprises a row-fixing barrel (30) and a dragon mechanism (31) arranged in the row-fixing barrel (30), a connecting pipe connected with the bottom opening of the row-fixing funnel (8) is arranged at the top of the row-fixing barrel (30), the row-fixing end of the row-fixing barrel (30) penetrates through the pool wall of the sedimentation pool (6), and a valve structure is arranged at the row-fixing end of the row-fixing barrel (30).

3. A mariculture water recycling purification device according to claim 1, characterized in that the mesh of the arc-shaped filter screen (17) is 300 mesh.

4. A mariculture water recycling purification device according to claim 1, characterized in that the water passing pipe (16) is parallel to the circular arc center line of the arc filter screen (17).

5. The mariculture water recycling purification device according to claim 4, wherein a guide rod (32) and a screw rod (33) are arranged in the sand collecting groove (19), the screw rod (33) is rotatably connected with two end groove walls in the sand collecting groove (19) through a bearing, one end outside the sand collecting groove (19) is provided with a motor assembly for driving the screw rod (33) to rotate, a sliding block (34) in threaded connection with the screw rod (33) is sleeved on the guide rod (32) in a sliding manner, a brush structure (35) which is adaptive to the cambered surface of the arc-shaped filter screen (17) is arranged on the inner side of the sliding block (34), and a drain outlet is arranged at the bottom of one end of the sand collecting groove (19).

6. The mariculture water recycling purification device according to claim 5, wherein the filtering layer () comprises two net plates (36) which are arranged in parallel and a quartz sand structure (37) filled between the two net plates (36), the water inlet cylinder (10) vertically penetrates through the two net plates (36) to be arranged, one net plate (36) positioned below is fixedly connected with the pool wall of the sedimentation tank (6) through a bolt structure, the water inlet cylinder (10) is fixedly connected with one net plate (36) positioned below, and the other net plate (36) positioned above is sleeved on the water inlet cylinder (10).

7. The mariculture water recycling and purifying device according to claim 6, wherein a spiral blade (38) which is matched with the wall of the water inlet barrel (10) is arranged in the middle of the rotating shaft (13).

8. The mariculture water recycling purification device according to claim 6, wherein a first vertical plate (39) and a second vertical plate (40) are arranged in the water supplementing filter tank (4) at intervals, the inner cavity of the water supplementing filter tank (4) is divided into a first filter cavity, a second filter cavity and a third filter cavity by the first vertical plate (39) and the second vertical plate (40), a water gap is formed in the top of the first vertical plate (39), a water gap is formed in the bottom of the second vertical plate (40), a plurality of staggered transverse plates (41) are arranged in the first filter cavity, the second filter cavity and the third filter cavity, the transverse plates (41) divide the first filter cavity, the second filter cavity and the third filter cavity into roundabout filter channels, filter structures are arranged in the roundabout filter channels, a vertical pipe (42) which is vertically arranged through the transverse plates (41) is arranged in the first filter cavity, and the seawater inlet is formed in the top of the vertical pipe (42).

9. The mariculture water recycling and purifying device according to claim 8, wherein two positioning vertical rods (43) are arranged in the biological purifying box (2), grid frames (44) are sleeved on the two positioning vertical rods (43), elastic three-dimensional packing (25) is arranged in the grid frames (44), springs (45) respectively abutted to the bottom surface and the top surface of the grid frames (44) are fixedly arranged at the bottom and the top of the positioning vertical rods (43), and vibrators (46) are arranged on the grid frames (44).