CN114031201A

CN114031201A - Physical purification device and purification method for blue algae pollution

Info

Publication number: CN114031201A
Application number: CN202111439474.2A
Authority: CN
Inventors: 张倩如
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-02-11

Abstract

The invention discloses a physical purification device and a physical purification method for blue algae pollution, which comprise a base structure for filtering blue algae, floating structures arranged at the left side and the right side of the base structure, and a first platform built above the base structure, wherein a water pump for providing negative pressure is installed at the upper part of the first platform, a storage battery unit for storing electric energy is installed at the lower part of the first platform, and the storage battery unit supplies power to the water pump; a second platform is built above the first platform, the interior of the second platform is hollow, and spraying holes inclined upwards are formed in the left side and the right side of the second platform; the water pump is connected with an extraction pipe and a conveying pipe, the extraction pipe is matched with the base structure and extracts water after blue algae filtration, and the conveying pipe extends upwards and then is connected with and communicated with the second platform; the second platform forms a cover above the water pump; the device can realize physical blue-green algae capture and blue-green algae purification.

Description

Physical purification device and purification method for blue algae pollution

Technical Field

The invention relates to a physical purification device and a physical purification method for blue algae pollution.

Background

In some water bodies with rich nutrition, some blue-green algae usually breed in large quantities in summer, and form a layer of blue-green floating foam with fishy smell on the water surface, which is called water bloom, and large-scale blue-green algae outbreak is called green tide (corresponding to red tide generated by the sea). The green tide causes the deterioration of water quality, and the death of fishes is caused by exhaustion of oxygen in water in severe cases. More seriously, some blue algae species (such as microcystis) also produce Microcystins (MCs), and about 50% of the green tide contains a large amount of MCs. MCs are not only directly toxic to fish, human and livestock, but also important causes of liver cancer.

When a large amount of blue-green algae appear, nearby water bodies are generally blue or green, the water surface is covered by thick blue-green lake indigo and is blown to the bank to be accumulated, so that foul smell is emitted, and the blue-green algae cells containing toxins swim in the water bodies, precipitate along with excrement when being complexed with certain suspended matters or being caught by breeding objects, are enriched at the bottom of a fish pond, and bring huge negative effects on the production of pollution-free aquatic products.

The collarbone algae in the blue algae can quickly generate lethal factors, destroy gill tissues of a culture object, interfere the normal metabolism of the culture object, paralyze nerves and kill the gill tissues. Individual species of cyanobacteria not only live with toxicity, but also die individual can produce biotoxin-cyanobacteria toxin (such as microcystin) by decomposition. The blue algae toxin can directly cause poisoning and death of the cultured objects when the amount of the blue algae toxin is large, or even if the amount of the blue algae toxin is small, the blue algae toxin can damage the cultured objects through the food chain accumulation effect until the blue algae poison harms human bodies.

In the traditional technology, 10 kilograms per mu of zeolite powder is sprinkled in the whole pool to flocculate the blue algae aiming at the blue algae pollution, and secondly, bacillus algicidal (bacillus laterosporus) is sprinkled in the whole pool after 3-4 hours, and the dosage is 500 grams per mu. Thirdly, balancing the proportion of nitrogen and phosphorus, changing the proportion of nitrogen and phosphorus by sprinkling inorganic phosphorus, accelerating the rapid growth of beneficial algae such as green algae, diatom and the like to become dominant algae species to inhibit the growth of the blue algae, thereby improving the condition of the over-reproduction of the blue algae.

The treatment method has the advantages of low effect taking speed, easy repetition of blue algae pollution, large water area, same treatment dosage during secondary treatment and relatively high treatment cost.

Therefore, a blue algae pollution physical purification device and a blue algae pollution physical purification method capable of realizing the physical capture of blue algae and the purification of blue algae are designed.

Disclosure of Invention

The invention aims to solve the technical problem of providing a blue algae pollution physical purification device and a blue algae pollution physical purification method which can realize the physical capture of blue algae and the purification of blue algae.

In order to solve the problems, the invention adopts the following technical scheme:

a physical purification device for blue algae pollution comprises a base structure for filtering blue algae, floating structures arranged at the left side and the right side of the base structure, and a first platform built above the base structure, wherein a water pump for providing negative pressure is installed at the upper part of the first platform, a storage battery unit for storing electric energy is installed at the lower part of the first platform, and the storage battery unit supplies power to the water pump; a second platform is built above the first platform, the interior of the second platform is hollow, and spraying holes inclined upwards are formed in the left side and the right side of the second platform; the water pump is connected with an extraction pipe and a conveying pipe, the extraction pipe is matched with the base structure and extracts water after blue algae filtration, and the conveying pipe extends upwards and then is connected with and communicated with the second platform; the second platform forms a cover over the water pump.

Preferably, the base structure comprises a left base plate and a right base plate, a filter cartridge is connected between the bottoms of the two base plates, and the filter cartridge is responsible for feeding water from the surface of river water to enter surface water; water inlets are formed in the front wall surface and the rear wall surface of the filter cylinder; the lower edge of the water inlet is lower than the base plate, so that water can be conveniently fed. A V-shaped groove is formed between the two base plates, and a diversion trench is arranged in the formed V-shaped groove; the arrangement of the diversion trench is convenient for sucking the surface water mixed with the blue algae into the filter cylinder; the middle part of the guide groove is provided with an arc groove attached to the outer wall of the filter cylinder, and the guide groove and the filter cylinder can be fitted and mounted through the arc groove; the bottom surface of the diversion trench is lower than the height of the base plate; a three-way pipe is inserted into the bottom of the filter cylinder, and the upper end of the three-way pipe is upwards inserted into the filter cylinder and upwards extends for 5-10 cm; the upper end of the three-way pipe extends upwards, so that the inside of the filter cylinder can achieve the technical effect of precipitation; the extraction pipe downwards penetrates through the base plate and then is in butt joint with the three-way pipe; a limiting ring is arranged on the inner wall of the filter cylinder; a ring body is arranged in the filter cylinder, a separating cylinder is arranged at the bottom of the ring body, the outer diameter of the separating cylinder is smaller than that of the ring body, and the limiting ring is limited at the bottom of the ring body; the separation cylinder is in clearance fit with the filter cylinder, a plurality of through grooves are formed in the outer wall of the separation cylinder, a filter screen is arranged in each through groove, the upper end of the ring body protrudes out of the base plate, a first through groove corresponding to the water inlet and the arc-shaped groove is formed in the outer wall of the ring body, and a coarse filter grid is arranged in each first through groove; a connecting rod is matched between the second platform and the first platform, and a second connecting rod is matched between the first platform and the base plate. The separating cylinder can move upwards and then is separated from the filter cylinder, and the inside of the separating cylinder can be cleaned after the separating cylinder is separated; meanwhile, the filter cartridge and the separating drum are in clearance fit, so that water is drained from the filter screen conveniently, drained water is precipitated to the inner bottom of the filter cartridge, and then is extracted and drained through the three-way pipe. In the technical scheme, the coarse filtering grille is further arranged, the technical effect of coarse filtering is achieved through the coarse filtering grille, and floating objects such as leaves, bottles and the like floating on the river surface are prevented from entering the separating cylinder; the cleaning work in the later period is convenient.

Preferably, a plurality of vertical rods are uniformly distributed at the bottom of the diversion trench, and a gap for passing water and blue algae is formed between every two adjacent vertical rods.

The vertical rod is fixed with the diversion trench in a threaded connection mode, and the vertical rod can play a role in intercepting floating objects.

Preferably, a lifting device is matched between the second platform and the ring body; and a guide rail matched with the lifting device is arranged between the second platform and the base plate.

The lifting means acts to lift the separator cartridge upwardly out of the filter cartridge.

Preferably, the lifting device comprises a lead screw and a lead screw nut matched with the lead screw; a bracket is arranged outside the screw nut, and a sliding sleeve is arranged outside the bracket; a pin shaft is matched between the bracket and the ring body; the sliding sleeve is sleeved on the guide rail and slides along the vertical direction of the guide rail; the lower end of the lead screw is screwed into a limiting nut; and a shaft sleeve is arranged in the middle of the second platform, and a bearing is matched between the shaft sleeve and the screw rod.

In the technical scheme, the screw nut is driven to move upwards along the screw by the rotation of the screw; lifting the ring body upwards by matching the bracket, and separating the separating cylinder from the filter cylinder upwards; meanwhile, the ring body is rotatable, and the separating cylinder can be rotated to a horizontal or negative angle by rotating the ring body, so that blue algae in the separating cylinder can be poured out conveniently.

Preferably, the screw rod is hollow, an internal thread is arranged in the screw rod, a screw rod is matched with the internal thread, and a conical pressure plate is arranged at the lower end of the screw rod; along with the rotation of the screw rod, the lifting device drives the ring body to move upwards, and the pressure plate enters the separating cylinder and extrudes the filtered blue algae.

The technical scheme has two technical effects:

the technical effect is as follows: the position of the pressure plate can be changed by rotating the screw rod, and the pressure plate can be pressed into the separation barrel when the separation barrel is moved upwards by rotating the screw rod, so that the extrusion of the blue algae is realized, and the dehydration rate of the blue algae is increased; because the blue algae is dehydrated, the blue algae can be more conveniently cleaned out of the separating cylinder. Meanwhile, due to dehydration, the quality of the blue algae is reduced, and the blue algae is convenient to clear and transport.

The technical effect is as follows: after the separating cylinder is upwards separated from the filter cylinder, the screw rod can be rotated, so that the pressure plate is pressed down and props against the ring body, the separating cylinder at the moment keeps a horizontal state and is locked, and the inside of the separating cylinder is convenient to clean.

Preferably, the floating structure include with bed plate welded fastening's flotation tank, the flotation tank transversely sets up, the flotation tank is kept away from that one end threaded connection of bed plate has the closing cap, be provided with branch pole around the outer wall department of flotation tank, branch pole is kept away from that one end of flotation tank is provided with first flotation tank, first flotation tank vertically sets up.

The floating barrel is sealed by the sealing cover, and water can be injected into the floating barrel to adjust the balance weight. The first floating barrels arranged in front and at back have the technical effect of balancing.

A purifying method of a physical purifying device for blue algae pollution comprises the following steps:

step 1: putting the purification device into water, fully charging the storage battery unit, and supplying power to the water pump; through the operation of a water pump, blue algae which is near and suspended on the water surface is collected through a base structure, meanwhile, mixed water is absorbed into the base structure together, the water is filtered through the base structure and then is upwards pumped to a second platform through the water pump, then is sprayed out to the left side and the right side through spraying holes, oxygen in the air is brought into the water through the sprayed water, meanwhile, ripples are generated, the floating blue algae on the two sides of the purification device are pushed to approach the base structure, and the blue algae on the surface layer is sucked;

step 2: the base structure is cleaned regularly.

The invention has the beneficial effects that:

1. the device adopts a floating structural design, can realize fixed point by means of anchoring, and can be freely moved on the water surface after being tied by a rope due to the fact that power is supplied by a storage battery, so that the technical effect of movably capturing blue algae is realized;

2. the left side and the right side of the second platform are provided with spraying holes, and blue algae on the surface layer of the water surface can be driven to move through the spraying holes; the second platform forms a cover above the water pump, so that the water pump is prevented from entering water in rainy days;

3. the separation cylinder is convenient to be upwards extracted and separated from the filter cylinder through the lifting device, so that the blue algae after separation can be conveniently cleaned;

4. the device realizes water circulation by adopting a water pump to pump water, and meanwhile, negative pressure is also established at the bottom of the filter cylinder in the water circulation, so that blue algae can be collected conveniently, filtered water is sprayed in a backflow manner, and the sprayed water impacts the water surface to achieve the technical effect of oxygenation;

5. the structure of this device is comparatively simple, and the cost is comparatively cheap, is fit for using widely.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic view of the engagement of the filter cartridge and separator cartridge;

FIG. 5 is a front view of the separator bowl;

FIG. 6 is a perspective view of the filter cartridge;

FIG. 7 is a top view of a flow guide slot;

FIG. 8 is a schematic view of the mating of the base plate and the filter cartridge;

FIG. 9 is a cross-sectional view of the lifting device;

FIG. 10 is a top view of the base structure;

FIG. 11 is a schematic view of the installation of the floating structure;

fig. 12 is a top view of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 12.

Example 1

A physical purification device for blue algae pollution comprises a base structure 1 for filtering blue algae, floating structures 2 arranged at the left side and the right side of the base structure 1, and a first platform 3 constructed above the base structure 1, wherein a water pump 4 for providing negative pressure is installed at the upper part of the first platform 3, a storage battery unit 5 for storing electric energy is installed at the lower part of the first platform 3, and the storage battery unit 5 supplies power to the water pump 4; a second platform 6 is built above the first platform 3, the second platform 6 is hollow, and spraying holes 601 which incline upwards are formed in the left side and the right side of the second platform 6; the water pump 4 is connected with an extraction pipe 41 and a conveying pipe 42, the extraction pipe 41 is matched with the base structure 1 and extracts water after blue algae filtration, and the conveying pipe 42 extends upwards and then is connected with and communicated with the second platform 6; the second platform 6 forms a cover above the water pump 4.

Example 2

The base structure 1 comprises a left base plate and a right base plate 101, a filter cartridge 102 is connected between the bottoms of the two base plates 101, and the filter cartridge 102 is responsible for feeding water from the surface of river water to enter surface water; a water inlet 103 is formed in the front wall surface and the rear wall surface of the filter cylinder 102; the height of the lower edge of the water inlet 103 is lower than that of the base plate 101, so that water can be conveniently fed. A V-shaped groove is formed between the two base plates 101, and a diversion trench 104 is arranged in the formed V-shaped groove; the arrangement of the diversion trench 104 is convenient for sucking the surface water mixed with the blue algae into the filter cylinder 102; an arc-shaped groove 105 attached to the outer wall of the filter cartridge 102 is formed in the middle of the guide groove 104, and the guide groove 104 and the filter cartridge 102 can be installed in a fit manner due to the arc-shaped groove 105; the bottom surface of the diversion trench 104 is lower than the height of the base plate 101; a three-way pipe 106 is inserted into the bottom of the filter cylinder 102, and the upper end of the three-way pipe 106 is inserted into the filter cylinder 102 upwards and extends upwards for 5-10 cm; the upper end of tee 106 extends upward so that the interior of filter cartridge 102 can have a settling effect; the extraction pipe 41 passes through the base plate 101 downwards and then is butted with the three-way pipe 106; a limit ring 107 is arranged on the inner wall of the filter cylinder 102; a ring body 108 is arranged in the filter cylinder 102, a separating cylinder 109 is arranged at the bottom of the ring body 108, the outer diameter of the separating cylinder 109 is smaller than that of the ring body 108, and the limiting ring 107 is limited at the bottom of the ring body 108; the separation cylinder 109 is in clearance fit with the filter cylinder 102, a plurality of through grooves 110 are formed in the outer wall of the separation cylinder 109, a filter screen 111 is arranged in each through groove 110, the upper end of the ring body 108 protrudes out of the base plate 101, a first through groove 112 corresponding to the water inlet 103 and the arc-shaped groove 105 is formed in the outer wall of the ring body 108, and a coarse filter grid 113 is arranged in each first through groove 112; a link 611 is fitted between the second platform 6 and the first platform 3, and a second link 311 is fitted between the first platform 3 and the base plate 101. The separation cylinder 109 can be separated from the filter cylinder 102 after moving upward, and the inside of the separation cylinder 109 can be cleaned after separation; meanwhile, the filter cylinder 102 and the separation cylinder 109 are in clearance fit, so that water is drained from the filter screen 111, the drained water is settled to the inner bottom of the filter cylinder 102, and then the water is extracted and drained through the tee pipe 106. In the technical scheme, the coarse filtering grille 113 is further arranged, the technical effect of coarse filtering is achieved through the coarse filtering grille 113, and floating objects such as leaves, bottles and the like floating on the river surface are prevented from entering the separating cylinder 109; the cleaning work in the later period is convenient.

Example 3

A plurality of vertical rods 121 are uniformly distributed at the bottom of the diversion trench 104, and a gap for passing water and blue algae is formed between the adjacent vertical rods 121.

The vertical rod 121 is fixed with the diversion trench 104 in a threaded connection mode, and the vertical rod 121 can play a role in intercepting floating objects.

Example 4

A lifting device 7 is matched between the second platform 6 and the ring body 108; between the second platform 6 and the foundation plate 101 there are arranged guide rails 8 for the lifting device 7.

The lifting device 7 acts to lift the separation drum 109 upwards out of the filter cartridge 102.

Example 5

The lifting device 7 comprises a lead screw 701 and a lead screw nut 702 matched with the lead screw 701; a bracket 703 is arranged outside the screw nut 702, and a sliding sleeve 704 is arranged outside the bracket 703; a pin shaft 705 is matched between the bracket 703 and the ring body 108; the sliding sleeve 704 is sleeved on the guide rail 8 and slides along the vertical direction of the guide rail 8; the lower end of the lead screw 701 is screwed into a limiting nut 771; a shaft sleeve 661 is arranged at the middle position of the second platform 6, and a bearing 662 is matched between the shaft sleeve 661 and the lead screw 701.

In the above technical solution, the rotation of the lead screw 701 drives the lead screw nut 702 to move upwards along the lead screw 701; by the cooperation of the bracket 703, the ring body 108 is lifted upward and the separation cylinder 109 is separated upward from the filter cylinder 102; meanwhile, the ring body 108 is rotatable, and the separating cylinder 109 can be rotated to a horizontal or negative angle by rotating the ring body 108, so that blue algae in the separating cylinder 109 can be poured out conveniently.

Example 6

The screw 701 is hollow, an internal thread is arranged in the screw 701, a screw 711 is matched with the internal thread, and a conical pressure plate 712 is arranged at the lower end of the screw 711; along with the rotation of the screw 701, the lifting device 7 drives the ring body 108 to move upwards, and the pressure plate 712 enters the separation cylinder 109 and extrudes the filtered blue algae.

The technical scheme has two technical effects:

the technical effect is as follows: the position of the pressure plate 712 can be changed by rotating the screw 711, and when the separation cylinder 109 is moved upwards by rotating the screw 701, the pressure plate 712 can be pressed into the separation cylinder 109, so that the extrusion of the blue algae is realized, and the dehydration rate of the blue algae is increased; because the blue algae is dehydrated, the blue algae can be more conveniently cleaned out of the separating cylinder 109. Meanwhile, due to dehydration, the quality of the blue algae is reduced, and the blue algae is convenient to clear and transport.

The technical effect is as follows: after the separation cylinder 109 is separated from the filter cartridge 102 upwards, the screw 711 can be rotated to press the pressure plate 712 against the ring 108, and the separation cylinder 109 is locked while maintaining a horizontal state, thereby facilitating cleaning of the inside of the separation cylinder 109.

Example 7

The floating structure 2 comprises a floating barrel 201 fixed to the base plate 101 in a welded mode, the floating barrel 201 is transversely arranged, the end, away from the base plate 101, of the floating barrel 201 is connected with a sealing cover 202 in a threaded mode, branch rods 203 are arranged on the front portion and the rear portion of the outer wall of the floating barrel 201, one end, away from the floating barrel 201, of each branch rod 203 is provided with a first floating barrel 204, and the first floating barrel 204 is longitudinally arranged.

The float bowl 201 is closed by a cover 202, and water can be filled in the float bowl 201 to adjust the weight. The first floating barrels 204 arranged in front and at the back have the technical effect of balancing.

Example 8

step 1: putting the purification device into water, fully charging the storage battery unit 5, and supplying power to the water pump 4; through the operation of the water pump 4, blue algae which is near and suspended on the water surface is collected through the base structure 1, meanwhile, the mixed water is absorbed into the base structure 1 together, the water is filtered through the base structure 1 and then is pumped upwards to the second platform 6 through the water pump 4, then is sprayed out to the left side and the right side through the spraying holes 601, oxygen in the air is brought into the water through the sprayed water, meanwhile, ripples are generated, the floating blue algae at the two sides of the purification device are pushed to approach the base structure 1, and the blue algae on the surface layer is sucked;

step 2: the base structure 1 is cleaned regularly. .

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A blue algae pollution physical purification device is characterized in that: the device comprises a base structure (1) for filtering blue algae, floating structures (2) arranged at the left side and the right side of the base structure (1), and a first platform (3) built above the base structure (1), wherein a water pump (4) for providing negative pressure is installed at the upper part of the first platform (3), a storage battery unit (5) for storing electric energy is installed at the lower part of the first platform (3), and the storage battery unit (5) supplies power to the water pump (4); a second platform (6) is built above the first platform (3), the second platform (6) is hollow, and spraying holes (601) inclined upwards are formed in the left side and the right side of the second platform (6); the water pump (4) is connected with an extraction pipe (41) and a conveying pipe (42), the extraction pipe (41) is matched with the base structure (1) and extracts water after blue algae filtration, and the conveying pipe (42) extends upwards and then is connected with and communicated with the second platform (6); the second platform (6) forms a cover above the water pump (4).

2. The physical purification device for blue algae pollution according to claim 1, characterized in that: the base structure (1) comprises a left base plate and a right base plate (101), a filter cartridge (102) is connected between the bottoms of the two base plates (101), and water inlets (103) are formed in the front wall surface and the rear wall surface of the filter cartridge (102); a V-shaped groove is formed between the two base plates (101), and a diversion trench (104) is arranged in the formed V-shaped groove; an arc-shaped groove (105) attached to the outer wall of the filter cartridge (102) is formed in the middle of the guide groove (104), and the bottom surface of the guide groove (104) is lower than the height of the base plate (101); a three-way pipe (106) is inserted into the bottom of the filter cylinder (102), and the upper end of the three-way pipe (106) is inserted into the filter cylinder (102) upwards and extends upwards for 5-10 cm; the extraction pipe (41) passes through the base plate (101) downwards and then is butted with the three-way pipe (106); a limiting ring (107) is arranged on the inner wall of the filter cylinder (102); a ring body (108) is arranged in the filter cylinder (102), a separating cylinder (109) is arranged at the bottom of the ring body (108), the outer diameter of the separating cylinder (109) is smaller than that of the ring body (108), and the limiting ring (107) is limited at the bottom of the ring body (108); the separation cylinder (109) is in clearance fit with the filter cylinder (102), a plurality of through grooves (110) are formed in the outer wall of the separation cylinder (109), a filter screen (111) is arranged in each through groove (110), the upper end of the ring body (108) protrudes out of the base plate (101), a first through groove (112) corresponding to the water inlet (103) and the arc-shaped groove (105) is formed in the outer wall of the ring body (108), and a coarse filtering grid (113) is arranged in each first through groove (112); a connecting rod (611) is matched between the second platform (6) and the first platform (3), and a second connecting rod (311) is matched between the first platform (3) and the base plate (101).

3. The physical purification device for blue algae pollution according to claim 1, characterized in that: a plurality of vertical rods (121) are uniformly distributed at the bottom of the diversion trench (104), and a gap for passing water and blue algae is formed between every two adjacent vertical rods (121).

4. The physical purification device for blue algae pollution according to claim 2, characterized in that: a lifting device (7) is matched between the second platform (6) and the ring body (108); a guide rail (8) for fitting the lifting device (7) is arranged between the second platform (6) and the base plate (101).

5. The physical purification device for blue algae pollution according to claim 4, characterized in that: the lifting device (7) comprises a lead screw (701) and a lead screw nut (702) matched with the lead screw (701); a bracket (703) is arranged outside the screw nut (702), and a sliding sleeve (704) is arranged outside the bracket (703); a pin shaft (705) is matched between the bracket (703) and the ring body (108); the sliding sleeve (704) is sleeved on the guide rail (8) and slides along the vertical direction of the guide rail (8); the lower end of the lead screw (701) is screwed into a limiting nut (771); a shaft sleeve (661) is arranged in the middle of the second platform (6), and a bearing (662) is matched between the shaft sleeve (661) and the lead screw (701).

6. The physical purification device for blue algae pollution according to claim 5, characterized in that: the screw rod (701) is hollow, an internal thread is arranged in the screw rod (701), a screw rod (711) is matched through the internal thread, and a conical pressing plate (712) is arranged at the lower end of the screw rod (711); along with the rotation of the screw rod (701), the lifting device (7) drives the ring body (108) to move upwards, and the pressing plate (712) enters the separating cylinder (109) and extrudes the filtered blue algae.

7. The physical purification device for blue algae pollution according to claim 1, characterized in that: the floating structure (2) comprises a floating barrel (201) fixed by welding on a base plate (101), the floating barrel (201) is transversely arranged, the floating barrel (201) is far away from one end of the base plate (101) is in threaded connection with a sealing cover (202), a branch rod (203) is arranged on the front portion and the rear portion of the outer wall of the floating barrel (201), the branch rod (203) is far away from one end of the floating barrel (201) and is provided with a first floating barrel (204), and the first floating barrel (204) is longitudinally arranged.

8. A method for purifying a cyanobacteria-polluted physical purification apparatus according to any one of claims 1 to 8, comprising: the method comprises the following steps:

step 1: putting the purification device into water, fully charging the storage battery unit (5), and supplying power to the water pump (4); through the operation of a water pump (4), blue algae which is near and suspended on the water surface is collected through a base structure (1), meanwhile, mixed water is absorbed into the base structure (1) together, the water is filtered through the base structure (1) and then is pumped upwards to a second platform (6) through the water pump (4), then is sprayed out to the left side and the right side through a spraying hole (601), oxygen in the air is brought into the water through the sprayed water, ripples are generated at the same time, the floating blue algae on the two sides of the purification device are pushed to approach the base structure (1) and are sucked into the blue algae on the surface layer;

step 2: the base structure (1) is cleaned regularly.