Movable floating island for ecological treatment of sewage and treatment method of movable floating island

Abstract

The invention provides a movable floating island for ecological treatment of sewage and a treatment method of the movable floating island, and belongs to the technical field of sewage treatment. Comprising a floating island body, a planting unit and a power unit which are installed on the floating island body, an auxiliary purification unit arranged at the bottom end of the floating island body, and a power source for providing electric energy for the power unit. The floating island is formed by mutually clamping a plurality of parallel floating island units, each floating island unit is formed by hinging a plurality of floating island modules end to end, and when the floating island units are not used, the floating island modules are mutually folded, so that the size of the floating island is smaller, the weight is more concentrated, and the service life of the floating island is prolonged. The space occupied by the floating island during storage is greatly reduced, and the floating island is convenient to carry and operate; the floating island power unit can drive the floating island to move on the water surface, so that the floating island can flexibly move to a to-be-treated area according to different sewage treatment requirements and water area conditions, and the use flexibility and adaptability of the floating island are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and specifically relates to a mobile floating island for sewage ecological treatment and a treatment method thereof. Background Art

[0002] At present, water pollution problem around the world has become an extremely serious environmental challenge.

[0003] Traditional sewage treatment technologies have many limitations when dealing with these complex water pollution problems. For example, although physical and chemical methods can quickly remove some pollutants in a short period of time, they are often costly, require complex equipment and a large amount of chemical agents, and may cause secondary pollution. Biological treatment methods, such as the activated sludge method, although they have a good removal effect on organic matter, have limited removal efficiency for nutrients such as nitrogen and phosphorus, and require a larger treatment site and strict operating conditions.

[0004] In this context, ecological floating island technology has emerged as an eco-friendly sewage treatment technology. Ecological floating island is a sewage treatment technology based on the natural purification ability of aquatic plants. It removes pollutants from the water by planting aquatic plants on the floating island and using the adsorption, absorption and decomposition of plant roots. However, the existing ecological floating island technology still has some shortcomings. On the one hand, most floating islands lack deep purification capabilities and can only purify the surface or local areas of the water body to a limited extent, and cannot comprehensively and effectively treat water bodies at different depths; on the other hand, some floating islands do not have the ability to move and can only be fixed in one place for sewage treatment. When the local water purification is completed, it cannot be transferred to other polluted areas in time to continue working, resulting in low equipment utilization and low treatment efficiency. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention provides a mobile floating island for sewage ecological management and a management method thereof.

[0006] The technical solution of the present invention is: a mobile floating island for sewage ecological treatment, comprising a floating island body, a planting unit and a power unit installed on the floating island body, an auxiliary purification unit arranged at the bottom of the floating island body, and a power source for providing electric energy to the power unit;

[0007] The main body of the floating island is formed by a plurality of floating island units parallel to each other and connected to each other. Each of the floating island units is formed by a plurality of floating island modules being hinged end to end. Each of the floating island modules is a frame structure and is provided with an inflatable airbag inside. A first through-mounting ring is provided at the center of the inflatable airbag, and a first clamping groove is provided on the left and right sides of the bottom end of each floating island module.

[0008] The planting unit comprises a planting tube clamped with the first through-mounting ring and aquatic plants planted in the planting tube;

[0009] The auxiliary purification unit includes a plurality of auxiliary installation frames corresponding to the floating island modules one by one, and a filling cylinder arranged on the auxiliary installation frame, wherein the filling cylinder is filled with water purification filler;

[0010] The auxiliary mounting frame is composed of a plurality of sub-frames distributed in sequence from top to bottom, and telescopic support rods are provided on the left and right sides of the upper end of each sub-frame, and a second clamping groove is provided at the bottom end of each sub-frame. The corresponding telescopic support rod on the sub-frame located at the uppermost end is movably connected with the first clamping groove, and two adjacent sub-frames located in the same vertical direction are movably connected through the corresponding telescopic support rod and the second clamping groove, and a plug-in adjustment rod is provided at the bottom end of the lowermost sub-frame, and a second through-mounting ring is provided at the center of each sub-frame, and a filling tube is provided in each second through-mounting ring.

[0011] Furthermore, the aquatic plants are a combination of reeds, calamus and hornwort, and the planting ratio of the reeds, calamus and hornwort is 3:3:4.

[0012] Description: As emergent plants, reeds and calamus can absorb a large amount of nitrogen, phosphorus and other nutrients from the water and bottom mud. As submerged plants, goldfish algae also have a good absorption capacity for dissolved nitrogen and phosphorus in the water. The three are planted in a ratio of 3:3:4. They can absorb nutrients in the water layer, while submerged plants can absorb nutrients from deep water bodies, thereby improving the removal efficiency of nitrogen and phosphorus in sewage by the entire floating island.

[0013] Furthermore, the inner walls of the first through-mounting ring and the second through-mounting ring are provided with a plurality of vertical sliding grooves along the circumferential direction, the upper end of the planting tube is provided with a first limiting ring, and the side wall of the planting tube is provided with a first vertical sliding bar corresponding to each of the vertical sliding grooves on the first through-mounting ring; the upper end of the filling tube is provided with a second limiting ring, and the side wall of the filling tube is provided with a second vertical sliding bar corresponding to each of the vertical sliding grooves on the second through-mounting ring.

[0014] Description: When the planting tube is installed in the first through-mounting ring, the first limit ring at its upper end is buckled to the upper end of the first through-mounting ring, which can effectively prevent the planting tube from being displaced in the up and down directions. The first vertical sliding bars on the side wall of the planting tube are slidably engaged with the vertical sliding grooves in the first through-mounting ring in a one-to-one correspondence, providing a stable connection in the lateral direction to prevent the planting tube from shaking or tilting in the horizontal direction. When encountering water flow fluctuations, wind blowing or the floating island itself moving, this lateral limiting structure can ensure that the planting tube maintains a vertically stable state, which is conducive to the normal growth of aquatic plants therein. When the filling tube is installed in the second through-mounting ring, the second limit ring is buckled to the upper end of the second through-mounting ring, which can effectively prevent the filling tube from being displaced in the up and down directions. The second vertical sliding bars on the side wall of the filling tube are slidably engaged with the vertical sliding grooves in the second through-mounting ring in a one-to-one correspondence, providing a stable connection in the lateral direction.

[0015] Furthermore, the telescopic support rod includes an upper support tube with an open structure at the bottom and a grid adjustment groove on the inner wall, a lower support tube with an upper end inserted into the upper support tube and slidably connected to the grid adjustment groove through a sliding block, and a sliding plug strip is provided at the upper end of the upper support tube.

[0016] Description: The telescopic support rod is used to connect two adjacent sub-frames located in the same vertical direction and the sub-frame and the floating island module. When it is necessary to adjust the length of the telescopic support rod, rotate the lower support tube so that the sliding block at its upper end is rotated to the corresponding vertical groove on the grid adjustment groove, and then slide the position of the lower support tube in the upper support tube up and down to achieve the purpose of adjusting the overall length of the telescopic support rod. When the preset length is reached, rotate the lower support tube so that the sliding block at its upper end is rotated to the corresponding horizontal groove on the grid adjustment groove to engage, thereby adjusting the length of the telescopic support rod.

[0017] Furthermore, the plug-in adjustment rod includes an upper adjustment cylinder with an open structure at the bottom end, a horizontal sliding plate slidably connected to the inner wall of the upper adjustment cylinder, a lower plug-in cylinder with an upper end inserted into the interior of the upper adjustment cylinder and connected to the horizontal sliding plate, an electric telescopic rod arranged between the upper adjustment cylinder and the horizontal sliding plate, a plug-in tip arranged at the bottom end of the lower plug-in cylinder, and the sliding plug-in strip is provided at the upper end of the upper support cylinder.

[0018] Description: When the floating island moves to the designated position, the electric telescopic rod drives the horizontal sliding plate to slide downward in the upper adjustment tube, so that the lower plug-in tube slides downward in the upper adjustment tube until the plug-in tip at the bottom of the lower plug-in tube is fixedly plugged into the bottom of the water body, avoiding external force impact and greatly increasing the overall stability of the floating island.

[0019] Furthermore, the power unit includes two propellers arranged on the side walls of the floating island module at the left and right ends of the floating island unit, a rotating shaft connected to the propellers, and a rotating motor connected to the rotating shaft.

[0020] Description: When the floating island needs to be moved, the rotating motor is started, and the rotating shaft and the propeller connected to the rotating shaft are driven to rotate synchronously by the rotating motor, so as to drive the floating island to move, so that the floating island can move normally under different water flow conditions.

[0021] Furthermore, a plurality of water-permeable holes are arranged on the wall of the planting tube, the diameter of the water-permeable holes is 2-5 mm, and a filter screen is arranged in the water-permeable holes.

[0022] Description: The water holes allow water to enter the planting tube, maintaining the soil moisture inside the tube at a level suitable for the growth of aquatic plants. At the same time, the filter screen filters out solid impurities in the water to prevent them from entering the planting tube and affecting the normal function of the aquatic plant root system.

[0023] Furthermore, the wall of the filler tube is a mesh structure, and the water purification filler is a mixture of activated carbon and biological ceramsite, wherein the mass ratio of activated carbon to biological ceramsite is 1:2-3.

[0024] Description: The packing tube is set to a mesh structure to ensure that the water enters and fully contacts the water purification packing inside it, so as to achieve the purpose of purifying the water body. Activated carbon has a strong adsorption capacity and can adsorb pollutants such as organic matter and heavy metal ions in the water. The surface of biological ceramsite is conducive to the attachment and growth of microorganisms, and microorganisms can decompose organic pollutants in the water. When the water body is in full contact with the water purification packing, the activated carbon and biological ceramsite can give full play to their purification function and remove pollutants in the water to the maximum extent, thereby improving the water purification efficiency of the entire floating island.

[0025] The present invention also discloses a sewage ecological treatment method, which is based on a mobile floating island for sewage ecological treatment and includes the following steps:

[0026] S1, unfolding each folded floating island module to form a floating island unit, and snap-joining the front and rear sides of each floating island unit to form a floating island body, and then installing a planting tube with aquatic plants planted inside in the first snap-joining groove on each floating island module;

[0027] S2, connecting each sub-frame through a telescopic support rod to form an auxiliary installation frame, and installing a stuffing cylinder in the second through-mounting ring at the center of each sub-frame, and then connecting each auxiliary installation frame to the first clamping groove at the bottom end of the corresponding floating island module through the telescopic support rod;

[0028] S3, placing the floating island body in step S2 on the water surface, and driving it to the water area to be treated by a power unit, and then inserting the plug-in adjustment rods at the bottom of each of the lowest sub-frames into the water bottom for fixing;

[0029] S4. Aquatic plants absorb nutrients and organic pollutants in sewage through their roots. At the same time, sewage enters the packing tube through the mesh tube wall and fully contacts with the water purification packing. The water purification packing absorbs organic matter and heavy metal ions in the sewage and decomposes the organic pollutants in the sewage. The two work together to purify the sewage.

[0030] S5. During the sewage treatment process, the sewage quality around the floating island is monitored regularly, and the floating island body is driven by the power unit to move to other waters for repeated treatment.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] The mobile floating island for sewage ecological treatment of the present invention is formed by a plurality of parallel floating island units that are mutually clamped, and each of the floating island units is formed by a plurality of floating island modules that are hinged end to end, and when the floating island units are not in use, the floating island modules are folded together. This design makes the floating island smaller in size and more concentrated in weight, greatly reduces the space occupied by the floating island during storage, and is convenient for handling operations; and an auxiliary purification unit is arranged at the bottom of each floating island unit, while using the synergistic effect of water purification fillers and aquatic plants to purify sewage, and can also adjust the length of the telescopic support rod to make each sub-frame at different depths in the water body, thereby purifying the water body at each layer depth and optimizing the purification effect; the floating island power unit can drive the floating island to move on the water surface, so that it can be flexibly moved to the area to be treated according to different sewage treatment needs and water conditions, thereby improving the use flexibility and adaptability of the floating island. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is the overall front view of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure of the floating island unit of the present invention when it is unfolded;

[0035] Figure 3 It is a schematic diagram of the structure of the floating island unit of the present invention when it is folded;

[0036] Figure 4 is a top view of the floating island body when the planting unit of the present invention is not installed;

[0037] Figure 5 is a top view of the floating island body when the planting unit of the present invention is installed;

[0038] Figure 6 is a top view of the floating island module of the present invention;

[0039] Figure 7 is a top view of the subframe of the present invention;

[0040] Figure 8is a schematic structural diagram of the telescopic support rod of the present invention;

[0041] Fig. 9 It is a structural schematic diagram of the plug-in adjustment rod of the present invention.

[0042] Among them, 1-floating island body, 10-floating island unit, 11-floating island module, 110-first card slot, 12-inflatable airbag, 13-first through-mounting ring, 14-vertical sliding card slot, 2-planting unit, 20-planting tube, 200-water permeable hole, 21-aquatic plant, 22-first limit ring, 23-first vertical sliding bar, 3-power unit, 30-propeller, 31-rotating shaft, 32-dual-axis rotating motor, 4-auxiliary purification unit, 40-auxiliary mounting frame, 41-filling Barrel, 42-water purification filler, 43-sub-frame, 430-telescopic support rod, 431-second clamping groove, 432-plug-in adjustment rod, 433-second through-mounting ring, 434-grid adjustment groove, 435-upper support tube, 436-lower support tube, 4360-sliding block, 437-sliding plug-in strip, 438-upper adjustment tube, 439-lower plug-in tube, 44-second limiting ring, 45-second vertical sliding bar, 46-horizontal sliding plate, 47-electric telescopic rod, 48-plug-in tip. DETAILED DESCRIPTION

[0043] In order to further understand the content of the present invention, the present invention is described in detail below through examples.

[0044] Example 1: Figure 1 As shown, a mobile floating island for sewage ecological treatment includes a floating island body 1, a planting unit 2 and a power unit 3 installed on the floating island body 1, an auxiliary purification unit 4 arranged at the bottom of the floating island body 1, and a power source for providing electric energy to the power unit 3, wherein the power source adopts an existing solar power source or wind power source;

[0045] like Figure 2 , 3 As shown in FIG. 4 , the floating island body 1 is formed by four parallel floating island units 10 that are connected to each other by clamping, each floating island unit 10 is formed by four floating island modules 11 that are hinged end to end, and each floating island module 11 is a frame structure and has an inflatable airbag 12 inside, a first through-mounting ring 13 is provided at the center of the inflatable airbag 12, and first clamping grooves 110 are provided on the left and right sides of the bottom end of each floating island module 11, wherein the inflatable airbag 12 adopts the existing technology, for example, an airbag with a model of DN180 can be used;

[0046] like Figure 1 , 5As shown in Figure 6, the planting unit 2 includes a planting tube 20 that is clamped with the first through-mounting ring 13, and an aquatic plant 21 planted in the planting tube 20. The aquatic plant 21 is a combination of reed, calamus and duckweed, and the planting ratio of the reed, calamus and duckweed is 3:3:4. As emergent plants, reed and calamus can absorb a large amount of nutrients such as nitrogen and phosphorus from the water body and bottom mud. As a submerged plant, duckweed also has a good absorption capacity for dissolved nitrogen and phosphorus in the water body. The three are planted in a ratio of 3:3:4, which can absorb nutrients in the water layer. The submerged plants absorb nutrients in the deep water, thereby improving the removal efficiency of nitrogen and phosphorus in sewage by the entire floating island; 10 water holes 200 are provided on the wall of the planting tube 20, and the diameter of the water holes 200 is 2 mm. A filter is provided inside the water holes 200, and the water holes 200 allow water to enter the planting tube 20, so that the soil humidity in the tube is maintained at a level suitable for the growth of aquatic plants 21. At the same time, the solid impurities in the water body are filtered out by the filter to prevent them from entering the planting tube 20 and affecting the normal function of the root system of the aquatic plants 21;

[0047] like Figure 1 , 7 As shown, the auxiliary purification unit 4 includes an auxiliary installation frame 40 corresponding to the floating island module 11, and a filling tube 41 arranged on the auxiliary installation frame 40. The filling tube 41 is filled with a water purification filler 42. The cylinder wall of the filling tube 41 is a mesh structure. The water purification filler 42 is a mixture of activated carbon and biological ceramsite, wherein the mass ratio of activated carbon to biological ceramsite is 1:2. The filling tube 41 is set to a mesh structure to ensure that water enters and fully contacts with the water purification filler 42 inside it, so as to achieve the purpose of purifying the water body. The activated carbon has a strong adsorption capacity and can adsorb pollutants such as organic matter and heavy metal ions in the water. The surface of the biological ceramsite is conducive to the attachment and growth of microorganisms, and the microorganisms can decompose organic pollutants in the water. When the water body is in full contact with the water purification filler 42, the activated carbon and the biological ceramsite can give full play to their purification functions, remove pollutants in the water to the maximum extent, thereby improving the water purification efficiency of the entire floating island;

[0048] like Figure 8As shown, the auxiliary mounting frame 40 is composed of two sub-frames 43 distributed in sequence from top to bottom, and telescopic support rods 430 are provided on the left and right sides of the upper end of each sub-frame 43, and a second clamping groove 431 is provided at the bottom end of each sub-frame 43. The corresponding telescopic support rod 430 on the sub-frame 43 at the uppermost end is movably connected with the first clamping groove 110, and the two adjacent sub-frames 43 located in the same vertical direction are movably connected through the corresponding telescopic support rod 430 and the second clamping groove 431. A plug-in adjustment rod 432 is provided at the bottom end of the sub-frame 43 located at the bottom, and a second through-mounting ring 433 is provided at the center of each sub-frame 43. A filling tube 41 is provided in each second through-mounting ring 433. The telescopic support rod 430 includes an upper support tube 435 with an open structure at the bottom end and a grid adjustment groove 434 on the inner wall, and an upper end is inserted into the upper support tube 435 and connected to the grid adjustment groove 434 through a sliding block 4360. The lower support tube 436 is slidably connected to the groove 434, and the upper end of the upper support tube 435 is provided with a sliding plug strip 437. The telescopic support rod 430 is used to connect two adjacent sub-frames 43 located in the same vertical direction and the sub-frame 43 and the floating island module 11. When it is necessary to adjust the length of the telescopic support rod 430, the lower support tube 436 is rotated to rotate the sliding block 4360 at its upper end to the corresponding vertical groove on the grid adjustment groove 434, and then the position of the lower support tube 436 in the upper support tube 435 is slid up and down to achieve the purpose of adjusting the overall length of the telescopic support rod 430. When the preset length is reached, the lower support tube 436 is rotated to rotate the sliding block 4360 at its upper end to the corresponding horizontal groove on the grid adjustment groove 434 for snapping. By adjusting the length of the telescopic support rod 430, the sub-frames 43 can be placed at different depths in the water body, thereby purifying the water bodies at each layer depth and optimizing the purification effect.

[0049] like Fig. 9 As shown, the plug-in adjustment rod 432 includes an upper adjustment cylinder 438 with an open structure at the bottom end, a horizontal sliding plate 46 slidably connected to the inner wall of the upper adjustment cylinder 438, a lower plug-in cylinder 439 with an upper end inserted into the upper adjustment cylinder 438 and connected to the horizontal sliding plate 46, an electric telescopic rod 47 arranged between the upper adjustment cylinder 438 and the horizontal sliding plate 46, and a plug-in tip 48 arranged at the bottom end of the lower plug-in cylinder 439. A sliding plug-in strip 437 is provided at the upper end of the upper support cylinder 435. When the floating island moves to a specified position, the horizontal sliding plate 46 is driven by the electric telescopic rod 47 to slide downward in the upper adjustment cylinder 438, so that the lower plug-in cylinder 439 slides downward in the upper adjustment cylinder 438 until the plug-in tip 48 at the bottom end of the lower plug-in cylinder 439 is fixedly plugged to the bottom of the water body, thereby avoiding external force impact and greatly increasing the overall stability of the floating island. Among them, the electric telescopic rod 47 adopts existing technology, such as the existing DT type electric push rod;

[0050] The power unit 3 includes two propellers 30 provided on the side walls of the floating island modules 11 at the left and right ends on the floating island unit 10, a rotating shaft 31 connected to the propellers 30, and a rotating motor 32 connected to the rotating shaft 31. When the floating island needs to move, the rotating motor 32 is started, and the rotating motor 32 drives the rotating shaft 31 and the propellers 30 connected to the rotating shaft 31 to rotate synchronously, thereby driving the floating island to move, enabling the floating island to move normally under different water flow conditions. Among them, both the propellers 30 and the rotating motor 32 adopt existing technologies. For example, the propellers 30 can adopt propellers of model XF2-T, and the rotating motor 32 can adopt existing Y series motors.

[0051] Embodiment 2: The difference between this embodiment and Embodiment 1 is that:

[0052] The barrel wall of the packing cylinder 41 is a mesh structure, and the water purification packing 42 is a mixture of activated carbon and biological ceramsite. Among them, the mass ratio of activated carbon to biological ceramsite is 1:3;

[0053] There are 10 water permeable holes 200 provided on the barrel wall of the planting cylinder 20. The diameter of the water permeable holes 200 is 5 mm, and a filter screen is provided inside the water permeable holes 200.

[0054] Embodiment 3: A sewage ecological treatment method, based on a mobile floating island for sewage ecological treatment in Embodiment 1, includes the following steps:

[0055] S1. Unfold each folded floating island module 11 to form a floating island unit 10, and connect the front and rear sides of each floating island unit 10 to form a floating island main body 1. Then, install a planting cylinder 20 with aquatic plants 21 planted inside in the first clamping grooves 110 on each floating island module 11;

[0056] S2. Connect each sub-frame 43 through the telescopic support rod 430 to form an auxiliary installation frame 40, and install a packing cylinder 41 in the second through installation ring 433 at the center of each sub-frame 43. Then, connect each auxiliary installation frame 40 to the first clamping groove 110 at the bottom end of the corresponding floating island module 11 through the telescopic support rod 430;

[0057] S3. Place the floating island main body 1 in step S2 on the water surface, and drive it to the water area to be treated through the power unit 3. Then, insert the plug-in adjustment rods 432 at the bottom ends of each of the lowermost sub-frames 43 into the bottom of the water for fixation;

[0058] S4. The aquatic plants 21 absorb nutrients and organic pollutants in the sewage through their roots. At the same time, the sewage enters the interior of the packing cylinder 41 through the mesh barrel wall, comes into full contact with the water purification packing 42, and the water purification packing 42 adsorbs organic matters and heavy metal ions in the sewage and decomposes organic pollutants in the sewage. The two work together to purify the sewage;

[0059] S5. During the sewage treatment process, the sewage quality around the floating island is monitored regularly, and the floating island body 1 is driven by the power unit 3 to move to other waters for repeated treatment.

[0060] Embodiment 3: This embodiment differs from Embodiment 1 in that:

[0061] The inner walls of the first through mounting ring 13 and the second through mounting ring 433 are provided with a plurality of vertical sliding grooves 14 along the circumferential direction, the upper end of the planting tube 20 is provided with a first limiting ring 22, and the side wall of the planting tube 20 is provided with a first vertical sliding bar 23 corresponding to each vertical sliding groove 14 on the first through mounting ring 13, the upper end of the filling tube 41 is provided with a second limiting ring 44, and the side wall of the filling tube 41 is provided with a second vertical sliding bar 45 corresponding to each vertical sliding groove 14 on the second through mounting ring 433.

[0062] Embodiment 4: This embodiment differs from Embodiment 3 in that:

[0063] In step S1, when the planting tube 20 is installed in the first through-mounting ring 13, the first limit ring 22 at its upper end is buckled on the upper end of the first through-mounting ring 13, which can effectively prevent the planting tube 20 from being displaced in the up and down directions. The first vertical sliding strips 23 on the side wall of the planting tube 20 are slidably engaged with the vertical sliding grooves 14 in the first through-mounting ring 13 in a one-to-one correspondence, providing a stable connection in the lateral direction, preventing the planting tube 20 from shaking or tilting in the horizontal direction.

[0064] In step S2, when the filling cylinder 41 is installed in the second through-mounting ring 433, the second limit ring 44 is buckled on the upper end of the second through-mounting ring 433, which can effectively prevent the filling cylinder 41 from being displaced in the up and down directions. The second vertical sliding bars 45 on the side walls of the filling cylinder 41 are slidably engaged with the vertical sliding grooves 14 in the second through-mounting ring 433, providing a stable connection in the lateral direction.

Claims

1. A mobile floating island for sewage ecological treatment, comprising a floating island body (1), a planting unit (2) and a power unit (3) installed on the floating island body (1), an auxiliary purification unit (4) arranged at the bottom of the floating island body (1), and a power source for providing electric energy to the power unit (3); The floating island body (1) is formed by a plurality of mutually parallel floating island units (10) being connected to each other by clamping, each of the floating island units (10) being formed by a plurality of floating island modules (11) being hinged at the head and tail, and each of the floating island modules (11) is a frame structure and is provided with an inflatable airbag (12) inside, a first through-mounting ring (13) is provided at the center of the inflatable airbag (12), and first clamping grooves (110) are provided on the left and right sides of the bottom end of each floating island module (11); The planting unit (2) comprises a planting tube (20) clamped with the first through-mounting ring (13), and aquatic plants (21) planted in the planting tube (20); The auxiliary purification unit (4) comprises a plurality of auxiliary installation frames (40) corresponding one to one to the floating island modules (11), and a filling cylinder (41) arranged on the auxiliary installation frame (40), wherein the filling cylinder (41) is filled with a water purification filler (42); The auxiliary installation frame (40) is composed of a plurality of sub-frames (43) arranged in sequence from top to bottom, and each of the sub-frames (43) is provided with telescopic support rods (430) on both sides of the upper end and the left and right sides, and each of the sub-frames (43) is provided with a second clamping groove (431) at the bottom end, and the corresponding telescopic support rod (430) on the sub-frame (43) located at the uppermost end is movably connected to the first clamping groove (110), and two adjacent sub-frames (43) located in the same vertical direction are movably connected through the corresponding telescopic support rod (430) and the second clamping groove (431), and the bottom end of the sub-frame (43) located at the lowermost end is provided with a plug-in adjustment rod (432), and a second through-mounting ring (433) is provided at the center of each sub-frame (43), and a filling tube (41) is provided in each second through-mounting ring (433).

2. The mobile floating island for sewage ecological management according to claim 1 is characterized in that: The aquatic plants (21) are a combination of reeds, calamus and hornwort, and the planting ratio of the reeds, calamus and hornwort is 3:3:

4.

3. The mobile floating island for sewage ecological treatment according to claim 1 is characterized in that: The inner walls of the first through-mounting ring (13) and the second through-mounting ring (433) are both provided with a plurality of vertical sliding grooves (14) along the circumferential direction; the upper end of the planting tube (20) is provided with a first limiting ring (22); the side wall of the planting tube (20) is provided with a first vertical sliding strip (23) corresponding one-to-one to each of the vertical sliding grooves (14) on the first through-mounting ring (13); the upper end of the filling tube (41) is provided with a second limiting ring (44); the side wall of the filling tube (41) is provided with a second vertical sliding strip (45) corresponding one-to-one to each of the vertical sliding grooves (14) on the second through-mounting ring (433).

4. The mobile floating island for sewage ecological treatment according to claim 1 is characterized in that: The telescopic support rod (430) comprises an upper support tube (435) with an open structure at the bottom end and a grid adjustment groove (434) provided on the inner wall, and a lower support tube (436) with an upper end inserted into the interior of the upper support tube (435) and slidably connected to the grid adjustment groove (434) via a sliding block (4360), and a sliding plug strip (437) is provided at the upper end of the upper support tube (435).

5. The mobile floating island for sewage ecological treatment according to claim 1 is characterized in that: The plug-in adjustment rod (432) includes an upper adjustment tube (438) with an open structure at the bottom end, a horizontal sliding plate (46) slidably connected to the inner wall of the upper adjustment tube (438), a lower plug-in tube (439) with an upper end inserted into the interior of the upper adjustment tube (438) and connected to the horizontal sliding plate (46), an electric telescopic rod (47) arranged between the upper adjustment tube (438) and the horizontal sliding plate (46), and a plug-in tip (48) arranged at the bottom end of the lower plug-in tube (439). The upper end of the upper support tube (435) is provided with the sliding plug-in strip (437).

6. The mobile floating island for sewage ecological treatment according to claim 1 is characterized in that: The power unit (3) comprises two propellers (30) arranged on the side walls of the floating island module (11) at the left and right ends of the floating island unit (10), a rotating shaft (31) connected to the propellers (30), and a rotating motor (32) connected to the rotating shaft (31).

7. The mobile floating island for sewage ecological treatment according to claim 1 is characterized in that: A plurality of water permeable holes (200) are arranged on the wall of the planting tube (20), the diameter of the water permeable holes (200) is 2-5 mm, and a filter screen is arranged inside the water permeable holes (200).

8. The mobile floating island for sewage ecological treatment according to claim 1 is characterized in that: The wall of the filling cylinder (41) is a mesh structure, and the water purification filler (42) is a mixture of activated carbon and biological ceramsite, wherein the mass ratio of the activated carbon to the biological ceramsite is 1:2-3.

9. A method for sewage ecological treatment, based on a mobile floating island for sewage ecological treatment according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, unfolding each folded floating island module (11) to form a floating island unit (10), and snap-joining the front and rear sides of each floating island unit (10) to form a floating island body (1), and then installing a planting tube (20) with aquatic plants (21) planted inside in a first snap-joining groove (110) on each floating island module (11); S2, connecting the sub-frames (43) through the telescopic support rod (430) to form an auxiliary installation frame (40), and installing a stuffing tube (41) in a second through-mounting ring (433) at the center of each sub-frame (43), and then connecting each auxiliary installation frame (40) to the first clamping groove (110) at the bottom end of the corresponding floating island module (11) through the telescopic support rod (430); S3, placing the floating island body (1) in step S2 on the water surface, and driving it to the water area to be treated by the power unit (3), and then inserting the plug-in adjustment rods (432) at the bottom of each of the lowermost sub-frames (43) into the water bottom for fixing; S4, the aquatic plants (21) absorb nutrients and organic pollutants in the sewage through their roots. At the same time, the sewage enters the packing tube (41) through the mesh tube wall and fully contacts the water purification packing (42). The water purification packing (42) absorbs organic matter and heavy metal ions in the sewage and decomposes the organic pollutants in the sewage. The two work together to purify the sewage. S5. During the sewage treatment process, the sewage quality around the floating island is regularly monitored, and the floating island body (1) is driven by the power unit (3) to move to other waters for repeated treatment.

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