Adsorption phosphorus removal filler, preparation method thereof and floating island type water body phosphorus removal purification device

Abstract

The invention relates to a formula and a method of an adsorption phosphorus removal filler, and the adsorption phosphorus removal filler comprises the following components in percentage by weight: 10-15% of active diatomite and 25-38% of gypsum powder as a total phosphorus adsorbent, or 35-38% of gypsum powder and 10-12% of iron oxyhydroxide as a phosphorus adsorbent, 20-35% of cement as an adhesive, 14.5-29.5% of stone powder as aggregate and 0.5% of a foaming agent. The main technical indexes are as follows: the stacking density of the adsorption phosphorus removal filler is 430-650kg / m < 3 >, the specific surface area is greater than or equal to 11.5 m < 2 > / g, the cylinder compressive strength is greater than or equal to 2.5 Mpa, the porosity is greater than or equal to 75%, the dry density is less than or equal to 800kg / m < 3 >, the water absorption rate is greater than or equal to 35%, and the particle size range is 5-40mm. The invention further discloses a floating island type water body dephosphorization and purification device which is composed of an air suction pipe, a buoyancy device, a buoyancy auxiliary device, a packaging structure, adsorption dephosphorization filler in the packaging structure, an aeration device and a photovoltaic power supply device. According to the floating island type water body dephosphorization and purification method, the floating island type water body dephosphorization and purification device is utilized, the adsorption dephosphorization filler is sealed in a packaging structure and placed in a water body needing to be purified, the phosphorus-containing water body passes through the dephosphorization filler in a convection mode, the filler adsorbs phosphate radicals in the water body, the total phosphorus in the water body is reduced from 0.21-1.5 mg / L to 0.2 mg / L or below, and the phosphorus content in the water body is reduced from 0.21-1.5 mg / L to 0.2 mg / L or below. Therefore, phosphorus removal and purification of the water body are realized, and phosphorus treatment of large-area water bodies and large scenes such as rivers, lakes, reservoirs and the like is realized.

Description

Technical Field

[0001] This invention relates to a formulation and production method of an adsorption phosphorus removal packing material, and a method for purifying river, lake, and reservoir water using the same material. It belongs to the fields of new materials and water environment management, specifically a floating island-type water phosphorus removal and purification device, an adsorption phosphorus removal packing material, and its preparation method. Background Technology

[0002] Artificial floating island technology is an eco-friendly and aesthetically pleasing treatment technique that simulates natural wetland systems and promotes ecological balance. Aquatic plants can absorb nutrients such as nitrogen and phosphorus from the water as nutrients for their own growth, preventing eutrophication. However, the absorption of phosphorus by plants is affected by factors such as season and growth cycle, and their root absorption capacity has an upper limit. Therefore, the removal rate of ammonia nitrogen and total phosphorus by this technology cannot be quantified, making it unsuitable for treating water bodies with high requirements and large flow rates. Furthermore, if the absorbed phosphorus is not harvested and transferred in time, there is a risk of secondary release back into the water body after the plants die.

[0003] Therefore, in the structural composition of a floating bed, phosphorus removal is typically achieved through the selection and use of the floating bed matrix or filler. However, while heavy fillers such as modified oyster shells and modified ceramsite have good phosphorus removal effects, their adsorption capacity is very limited, and they become ineffective after saturation, resulting in a short lifespan. Furthermore, their weight places a significant burden on the floating bed's buoyancy and they are expensive. Lightweight fillers, such as specialized modified plastics and polyurethane, while lighter and less burdensome on the floating bed, have even lower adsorption capacity and higher production costs.

[0004] Furthermore, since the core structure of an artificial floating bed is a frame floating on the water surface, if the density of the packing material is greater than that of water, it will cause the floating bed to sink, and the effective purification area of ​​the floating bed frame cannot be fixed. Therefore, there is an urgent need for an adsorption phosphorus removal packing material and a floating island-type water purification device that can both efficiently solve the phosphorus removal problem and meet the floating problem of artificial floating islands. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this application provides a floating island-type water adsorption phosphorus removal and purification device and method, which can effectively remove total phosphorus from river, lake, and reservoir waters, purifying Class V water bodies with excessive total phosphorus to Class II or Class III water quality according to the "Water Environmental Quality Standard" (GB3838-2002). The specific technical solution is as follows:

[0006] On one hand, this application provides an adsorption phosphorus removal packing material, which has a honeycomb-like porous structure. Its raw materials include 10-15% by weight of activated diatomaceous earth and 25-38% by weight of gypsum powder as a total phosphorus adsorbent, or 35-38% by weight of gypsum powder and 10-12% by weight of ferric hydroxide as a total phosphorus adsorbent, 20-35% by weight of cement as a binder, 14.5-29.5% by weight of stone powder as aggregate, and 0.5% by weight of foaming agent. The material is expanded, pulverized, and sieved. Its main technical indicator is that the bulk density of the adsorption phosphorus removal packing material is 430-650 kg / m³. 3 Specific surface area ≥12.5m² 2 / g, compressive strength ≥3.5MPa, porosity ≥75%, dry density ≤800kg / m³ 3 Water absorption rate ≥35%, particle size range 3~40mm.

[0007] Preferably, the phosphorus adsorption packing is a porous calcium-based expanded adsorption phosphorus adsorption packing, the raw materials of which include 10-15% by weight of activated diatomaceous earth as adsorbent, 25-38% by weight of gypsum powder as total phosphorus adsorbent, 25-30% by weight of cement as binder, 21.5-29.5% by weight of stone powder as aggregate and 0.5% by weight of foaming agent.

[0008] Preferably, the adsorption phosphorus removal filler is an iron-based expanded adsorption phosphorus removal filler, the raw materials of which include 35-38% by weight of gypsum powder and 10-12% by weight of ferric hydroxide as phosphorus adsorbent, 20-35% by weight of cement as binder, 14.5-17.5% by weight of stone powder as aggregate and 0.5% by weight of foaming agent.

[0009] Preferably, the activated diatomaceous earth in the phosphorus adsorption filler is a 120-300 mesh powder, the gypsum powder is a 120-400 mesh powder, the ferric hydroxide in the phosphorus adsorption filler is a 200-400 mesh powder, and the stone powder in the phosphorus adsorption filler is a 200-400 mesh powder.

[0010] Preferably, the gypsum powder is a 120-300 mesh powder or a 200-400 mesh powder.

[0011] Preferably, the silica content of the stone powder is greater than 50%; the foaming agent is an anionic surfactant or a cationic surfactant.

[0012] On the other hand, this application also provides a method for preparing the adsorption and phosphorus removal packing material as described above, the preparation method comprising the following steps:

[0013] S11: Ingredients: Provide the above raw materials, and mix the activated diatomaceous earth powder or ferric hydroxide, gypsum powder, cement, and stone powder evenly according to the preset ratio to form 600 parts of mixture (total weight is calculated as 1000 parts).

[0014] S12: Foaming: Add 0.5 parts by weight of anionic or cationic surfactant to 399.5 parts by weight of water, stir thoroughly to generate a large amount of foam, and form a foaming liquid;

[0015] S13: Pulping: Add the mixture obtained in S11 to the foaming liquid in S12, stir thoroughly, and prepare a slurry;

[0016] S14: Expansion molding: The slurry prepared in S13 is fed into a molding die to be cross-linked and molded into a porous solid material;

[0017] S15: Crushing: The extruded and cross-linked solids are fed into a crusher for crushing;

[0018] S16: Sieving: The crushed material is sieved to obtain adsorption and phosphorus removal packing with a particle size of 5-40 mm.

[0019] Preferably, the particle size of the adsorption phosphorus removal filler is 2-5 mm, 5-10 mm, 10-20 mm, or 20-40 mm.

[0020] Preferably, the internal structure of the molding die is rectangular.

[0021] On the other hand, this application provides a floating island-type water adsorption phosphorus removal and purification device, the device including an air intake pipe, aquatic plants, a buoyancy device, connecting components, a buoyancy auxiliary device, a sealing structure, an aeration device, an adsorption phosphorus removal packing, a jet aeration pipe and a solar energy system; the adsorption phosphorus removal packing is the aforementioned adsorption phosphorus removal packing.

[0022] The buoyancy auxiliary device is located on the outer periphery of the buoyancy device, and the solar energy system is located above the buoyancy device to supply power to the aeration device. The buoyancy device has holes for accommodating aquatic plants. The buoyancy device and the encapsulation structure are detachably connected by the connecting member. The encapsulation structure is used to load the aeration device and the adsorption and phosphorus removal packing. One end of the air inlet pipe is connected to the air inlet of the aeration device, and the other end of the air inlet pipe extends out of the buoyancy device and communicates with the atmosphere. The jet aeration pipe is connected to the outlet of the aeration device.

[0023] Preferably, the buoyancy device includes at least two floats, which are connected to each other to form a float layer. The floats have holes in the middle for accommodating aquatic plants, first bolt fixing points at the corners of the floats, and connecting member fixing points around the perimeter of the floats.

[0024] Preferably, the buoyancy device includes at least one float layer, the upper first float layer can be used to place aquatic plants, the body of the connecting member passes through the thickness direction of the upper first float layer and the lower second float layer, and one end of the connecting member is connected to the encapsulation structure.

[0025] Preferably, the solar power supply system includes a solar panel, a bracket, a controller, and an inverter. One end of the bracket is connected to the solar panel, and the other end of the bracket is connected to the buoyancy device. The solar power supply system is electrically connected to the aeration device.

[0026] Preferably, the floating island-type water adsorption phosphorus removal and purification device further includes a fixing device, which is movably connected to the encapsulation structure.

[0027] Preferably, the sidewall of the encapsulation structure is a mesh structure, and one end of the connecting member is attached to the top edge of the mesh structure.

[0028] On the other hand, using the above-mentioned floating island-type water adsorption phosphorus removal and purification device and the adsorption phosphorus removal packing, total phosphorus in the water is removed according to the following steps:

[0029] S21: Installation: The aeration device (8) and the adsorption phosphorus removal packing (9) are enclosed in the encapsulation structure (7). After the connecting component (4) is hooked to the encapsulation structure (7), the connecting component (4) is passed through the buoyancy device (5) to fix the encapsulation structure (7) and the buoyancy device (5). The installed floating island type water body phosphorus removal and purification device is placed in the water body to be purified.

[0030] S22: Adsorption Phosphorus Removal: The aeration device is activated, utilizing its pumping function to allow water to pass through the phosphorus adsorption packing material in the encapsulated structure and enter the aeration device. Jet aeration is then performed using jet aeration pipes, creating water convection and aeration. Total phosphorus in the water is adsorbed onto the phosphorus adsorption packing material, thus removing total phosphorus from the water. After treatment by the floating island-type water adsorption phosphorus removal purification device, water with a total phosphorus concentration of 0.2–2 mg / L (below Grade V) is reduced to less than 0.025–0.2 mg / L, thus purifying the below-grade water to Class II or Class III water quality according to the "Water Environmental Quality Standard" (GB3838-2002).

[0031] Based on the above technical solution, this application has the following beneficial effects:

[0032] 1. The adsorption phosphorus removal packing material of this application is made of gypsum powder, hydroxyl oxide powder, cement, stone powder, etc., and is expanded and molded by a foaming agent. The molded adsorption phosphorus removal packing material has advantages such as large porosity, large specific surface area, high stability, and high strength. It has a honeycomb porous structure and strong adsorption capacity, which can adsorb organic matter and total phosphorus in water onto the phosphorus removal packing material, thereby achieving denitrification to remove total phosphorus from the water and purifying the water quality. The main technical indicators of the adsorption phosphorus removal packing material produced using the above-described adsorption phosphorus removal packing material formula and method are: bulk density of 430-650 kg / m³. 3 Specific surface area ≥12.5m² 2 / g, compressive strength ≥3.5MPa, porosity ≥75%, dry density ≤800kg / m³ 3 The water absorption rate is ≥35%, and the particle size range is 3-40mm. Under dynamic conditions, the removal rate of total phosphorus of different concentrations in water is as follows after 20 minutes (referring to 20 minutes of flow through the phosphorus removal packing):

[0033]

[0034] 2. Compared with those on the market, the phosphorus adsorption packing described in this invention has a phosphorus adsorption and removal speed that is 3 to 5 times higher, and the volume and footprint of the phosphorus removal device can be reduced by 3 to 5 times.

[0035] 3. The bulk density of the phosphorus removal adsorption packing material described in this invention is 430–650 kg / m³. 3 It is lighter than water, and after absorbing water, its density is almost the same as that of water. Therefore, the floating island-type water adsorption and phosphorus removal device filled with it can float on the water surface, solving the problem of the device sinking.

[0036] 4. The price of the adsorption and phosphorus removal packing material described in this invention is only one-tenth of the price of similar packing materials on the market, which greatly reduces the market price.

[0037] 5. The floating island-type water adsorption phosphorus removal device of the present invention uses adsorption phosphorus removal packing as the main body. By detachably connecting the buoyancy device and the encapsulation structure, it is convenient to add and remove the adsorption phosphorus removal packing.

[0038] 6. The adsorption and phosphorus removal filler is filled in the encapsulation structure installed at the bottom of the buoyancy device. The encapsulation structure also has a water jet aeration device installed inside. The fixing system is connected to the encapsulation structure of the phosphorus removal ecological floating bed at one end and to the water tank at the other end, and is used to fix the ecological floating island (bed).

[0039] 7. The phosphorus removal effect and residence time of the floating island-type water adsorption phosphorus removal device of the present invention can be theoretically calculated, which solves the design problem that the denitrification and phosphorus removal effect of traditional ecological floating islands is difficult to calculate theoretically.

[0040] The floating island-type water adsorption and phosphorus removal device of this application promotes the formation of an ecological floating platform with the main purpose of water purification and biological denitrification, adsorption and phosphorus removal and landscape functions. It realizes the interaction between water and all aspects of the ecosystem, including plants, carriers and fillers, adsorption and phosphorus removal, microorganisms, atmosphere, and ecosystem, and is a "clean water habitat platform" in the water body.

[0041] Floating island-type water adsorption phosphorus removal devices increase the total amount of underwater microorganisms and aquatic plants, promoting the self-adjustment and restoration of the underwater ecosystem and the development of the aquatic ecosystem, forming a three-dimensional habitat platform. The deployment of ecological floating islands (beds) significantly increases the total amount of microorganisms in the deployed water area. By increasing the total amount of microorganisms at the bottom of the food chain in the aquatic ecosystem, it promotes the growth of benthic animals and fish that feed on microorganisms, and the plants on the ecological floating islands (beds) improve the aquatic ecosystem. Furthermore, the increased plant and fish populations in the water area promote the habitat and development of insects, birds, and amphibians. Phosphorus removal ecological floating islands can promote the self-development of ecosystems in newly created water bodies, promote the formation of stable multi-trophic-level ecosystems, promote the self-repair of damaged water bodies, adjust ecosystem structure, and promote the restoration of biodiversity, the improvement and stability of the ecosystem. It also enhances the self-purification capacity of water bodies and maintains stable water quality.

[0042] Floating island-type water adsorption and phosphorus removal devices can be made by cutting and assembling standardized modular floating plates into various artificial landscape shapes. The fibrous material on the surface of the ecological floating island (bed) carrier itself has a soft landscape effect, and soil or low-growing herbaceous plants such as turf can be covered on the edge of the ecological floating bed. By deploying ecological floating islands (beds) in rivers and lakes, the water landscape effect can be enhanced, showcasing water culture.

[0043] After the floating island-type water adsorption phosphorus removal and purification device of this invention is used to purify Class V water bodies with excessive total phosphorus, the water quality is purified to Class II or Class III water quality according to the "Water Environmental Quality Standard" (GB3838-2002). Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Appendix Figure 1 This is a schematic diagram of the preparation process of the adsorption and phosphorus removal packing material in this application;

[0046] Appendix Figure 2 This is a schematic diagram of the adsorption and phosphorus removal packing material product of this application;

[0047] Appendix Figure 3 This is a schematic diagram of a floating island-type water purification device according to this application;

[0048] Appendix Figure 4 This is a schematic diagram of the main view of the floating platform of this application;

[0049] Among them, 1. Solar energy system, 2. Air inlet pipe, 3. Aquatic plants, 4. Connecting components, 5. Buoyancy device, 6. Buoyancy auxiliary device, 7. Encapsulation structure, 8. Aeration device, 9. Packing material, 10. Jet aeration pipe, 11. Fixing device, 5-1. First bolt fixing point, 5-2. Hole, 5-3. Connecting component fixing point. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0051] For the terms defined below, unless a different definition is given elsewhere in the claims or this specification, these definitions shall apply. All numerical values, whether explicitly indicated or not, are defined herein as being modified by the term "about." The term "about" generally refers to a range of numerical values ​​that a person skilled in the art would consider equivalent to the stated values ​​to produce substantially the same properties, functions, results, etc. A range of numerical values ​​indicated by a low value and a high value is defined as including all numerical values ​​included within that range and all subranges included within that range.

[0052] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0053] The following describes the preparation method of the adsorption and phosphorus removal packing provided in the embodiments of this application, including the following steps:

[0054] On one hand, this application provides an adsorption phosphorus removal packing material with a honeycomb porous structure. Its raw materials include, by weight percentage, 10-15% activated diatomaceous earth as an adsorbent, 25-38% gypsum powder as a total phosphorus adsorbent, or 35-38% gypsum powder and 10-12% ferric hydroxide as a phosphorus adsorbent, 20-35% cement as a binder, 14.5-29.5% stone powder as aggregate, and 0.5% foaming agent. The main technical indicator of the adsorption phosphorus removal packing material is: the bulk density of the adsorption phosphorus removal packing material is 430-650 kg / m³. 3 Specific surface area ≥12.5m² 2 / g, compressive strength ≥3.5MPa, porosity ≥75%, dry density ≤800kg / m³ 3 It has a water absorption rate of ≥35%, a particle size range of 3-40mm, and a total phosphorus removal rate of 95% (tested on a water sample with a total concentration of 2.0mg / L). In addition, its porous honeycomb structure has strong adsorption capacity, enabling it to adsorb organic matter and microorganisms in the water onto the surface and in the honeycomb pores of its phosphorus removal packing.

[0055] In some embodiments, the activated diatomaceous earth is a 120-300 mesh powder, the ferric hydroxide is a 200-400 mesh powder, the gypsum powder is a 120-400 mesh powder, and the stone powder is a 200-400 mesh powder.

[0056] In some embodiments, the stone powder is waste dust from granite and other stones processed in the stone industry, and its silica content is greater than 50%. On the one hand, the stone powder serves as an aggregate to provide structural support for the filler; on the other hand, the silica in it can provide silanol active sites on the surface of the phosphorus adsorption filler, thereby improving the phosphorus adsorption capacity of the filler through surface complexation.

[0057] In some embodiments, the foaming agent is an anionic surfactant or a cationic surfactant, such as sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate, lauric acid, octadecylamine hydrochloride, fatty amine salt, etc.

[0058] In another aspect, this application also provides a method for preparing the above-mentioned adsorption and phosphorus removal packing, comprising the following steps:

[0059] S11: Ingredients: Provide the above raw materials, and mix the activated diatomaceous earth powder or ferric hydroxide, gypsum powder, cement and stone powder evenly according to the above preset ratio to form 600 parts of mixture (total weight is calculated as 1000 parts).

[0060] S12: Foaming: Add 0.5 parts by weight of anionic or cationic surfactant to 399.5 parts by weight of water, stir thoroughly to generate a large amount of foam, and form a foaming liquid;

[0061] S13: Pulping: Add the mixture obtained in S11 to the foaming liquid in S12, stir thoroughly, and prepare a slurry;

[0062] S14: Expansion molding: The slurry prepared in S13 is fed into a molding die to cross-link and form a porous solid material;

[0063] S15: Crushing: Porous solid materials formed by puffed cross-linking are fed into a crusher for crushing;

[0064] S16: Sieving: The pulverized material is sieved to obtain the adsorption and phosphorus removal packing with a particle size of 5-40 mm. Specifically, the obtained adsorption and phosphorus removal packing has particle sizes of 2-5 mm, 5-10 mm, 10-20 mm, and 20-40 mm.

[0065] In some embodiments, the phosphorus adsorption packing is an iron-based expanded phosphorus adsorption packing with a honeycomb porous structure. It comprises 35-38% by weight of gypsum powder and 10-12% by weight of iron hydroxide as phosphorus adsorbent, 20-35% by weight of cement as binder, 14.5-17.5% by weight of stone powder as aggregate, and 0.5% by weight of foaming agent. The packing is expanded, crushed, and sieved. Its main technical indicator is that the bulk density of the phosphorus adsorption packing is 430-650 kg / m³. 3 Specific surface area ≥12.5m² 2 / g, compressive strength ≥3.5MPa, porosity ≥75%, dry density ≤800kg / m³ 3 Water absorption rate ≥35%, particle size range 3~40mm.

[0066] The gypsum powder is a 120-300 mesh powder, the ferric hydroxide of the adsorption and phosphorus removal filler is a 200-400 mesh powder, and the stone powder of the adsorption and phosphorus removal filler is a 200-400 mesh powder.

[0067] Specifically, an example of preparing iron-based expanded adsorption phosphorus removal packing is as follows:

[0068] S11: Ingredients: 35% by weight of 120-mesh gypsum powder and 12% by weight of 400-mesh ferric hydroxide as total phosphorus adsorbent, 35% by weight of cement as binder, and 17.5% by weight of 200-mesh stone powder as aggregate, mixed evenly to form 600 parts of mixture (total weight is calculated as 1000 parts).

[0069] S12: Foaming: Add 0.5 parts by weight of sodium dodecylbenzenesulfonate to 399.5 parts by weight of water and stir thoroughly to produce a large amount of foam;

[0070] S13: Pulping: Add the mixture obtained in S11 to the foaming liquid in S12, stir thoroughly, and prepare a slurry;

[0071] S14: Expansion molding: The slurry prepared by S14 is fed into a molding die to be cross-linked and molded into a porous solid material;

[0072] S15: Crushing: The extruded and cross-linked solids are fed into a crusher for crushing;

[0073] S16: Sieving: The crushed material is sieved to obtain porous iron-based expanded phosphorus adsorption packing with particle sizes of 2-5mm, 5-10mm, 10-20mm, and 20-40mm.

[0074] In some embodiments, the phosphorus adsorption packing is a porous calcium-based expanded adsorption packing with a honeycomb-like porous structure. It is composed of 10-15% by weight of activated diatomaceous earth and 25-38% by weight of gypsum powder as the total phosphorus adsorbent, 25-30% by weight of cement as the binder, 21.5-29.5% by weight of stone powder as the aggregate, and 0.5% by weight of foaming agent. The packing is expanded, pulverized, and sieved. Its main technical indicators are: bulk density of 430-650 kg / m³. 3 Specific surface area ≥ 11.5 m² 2 / g, compressive strength ≥2.5MPa, porosity ≥75%, dry density ≤800kg / m³ 3 Water absorption rate ≥35%, particle size range 5~40mm.

[0075] Specifically, an example of preparing porous calcium-based expanded phosphorus adsorption packing is as follows:

[0076] S11: Ingredients: 38% by weight of 300-mesh gypsum powder as total phosphorus adsorbent, 15% by weight of 200-mesh activated diatomaceous earth as adsorbent, 25% by weight of cement as binder, and 21.5% by weight of 200-mesh stone powder as aggregate, mixed evenly to form 600 parts of mixture (total weight is calculated as 1000 parts).

[0077] S12: Foaming: Add 0.5 parts by weight of sodium dodecylbenzenesulfonate to 399.5 parts by weight of water and stir thoroughly to produce a large amount of foam;

[0078] S13: Pulping: Add the mixture obtained in S11 to the foaming liquid in S12, stir thoroughly, and prepare a slurry;

[0079] S14: Expansion molding: The slurry prepared by S14 is fed into a molding die to be cross-linked and molded into a porous solid material;

[0080] S15: Crushing: The extruded and cross-linked solids are fed into a crusher for crushing;

[0081] S16: Sieving: The crushed material is sieved to obtain porous calcium-based expanded phosphorus adsorption packing with particle sizes of 2-5mm, 5-10mm, 10-20mm, and 20-40mm.

[0082] In some embodiments, the internal structure of the molding die is rectangular, and the overall shape of the cross-linked porous solid material is also a matching rectangle.

[0083] The phosphorus adsorption packing material prepared in this application has a honeycomb structure with a large surface area, exhibiting a strong adsorption effect on phosphate in water. It achieves a total phosphorus removal rate of over 95% (using a total phosphorus concentration of 2.0 mg / L as the test water sample). Its phosphorus adsorption principle is as follows:

[0084] On the one hand, the gypsum in the filler slowly dissolves on the surface of the filler (the solubility of gypsum is 2.0 g / L), resulting in a large number of calcium ions on the surface. The calcium ions react with phosphate ions to form calcium phosphate, which is deposited on the surface of the filler.

[0085] Removal of phosphorus from water (adsorption reaction):

[0086] CaSO4·2H2O→Ca 2+ +SO4 2- +2H2O

[0087] Ca 2+ +PO4 - →CaPO4↓+H2O

[0088] On the other hand, the ferric hydroxide in the packing reacts with phosphate ions (adsorption reaction):

[0089] FeO-OH+H2PO4 - =FeO-HPO4 - +H2O

[0090] On the other hand, this application also provides a floating island-type water adsorption phosphorus removal and purification device, including an air intake pipe 2, aquatic plants 3, a connecting device 4, a buoyancy device 5, a buoyancy auxiliary device 6, an encapsulation structure 7, an aeration device 8, an adsorption phosphorus removal filler 9, a jet aeration pipe 10, and a solar energy system 1; wherein, the adsorption phosphorus removal filler 9 is the adsorption phosphorus removal filler described above; the buoyancy auxiliary device 6 is disposed on the outer periphery of the buoyancy device 5, and the solar energy system 1 is disposed above the buoyancy device 5; the buoyancy device 5 is provided with holes for accommodating the aquatic plants 3, and the buoyancy device 5 and the encapsulation structure 7 are detachably connected by the connecting member 4; the encapsulation structure 7 is used to load the aeration device 8 and the adsorption phosphorus removal filler 9, one end of the air intake pipe 2 is connected to the air inlet of the aeration device 8, the other end of the air intake pipe 2 extends out of the buoyancy device 5 and communicates with the atmosphere, and the jet aeration pipe 10 is connected to the outlet of the aeration device. Since the phosphorus adsorption packing material of this application is a composite modified packing material that combines lightweight and high adsorption capacity, it will not place an excessive load on the floating bed. The connection between the encapsulation structure 7 and the buoyancy device 5 also enables it to float. After the aeration device 8 is started, the water is pumped through the phosphorus adsorption packing material 9 in the encapsulation structure 7 into the aeration device 8. Jet aeration is performed using the jet aeration pipe, forming water convection and aeration. The total phosphorus in the water is adsorbed on the phosphorus adsorption packing material 9, thereby removing the total phosphorus from the water.

[0091] In some embodiments, the aeration device 8 is an aeration pump. The aeration device 8 serves to promote water flow, aerate the water to increase dissolved oxygen, and save energy and reduce consumption.

[0092] In some embodiments, the holes 5-2 are through holes or cavities for cultivating aquatic plants.

[0093] In some embodiments, the buoyancy device 5 includes at least two floats, which are connected to each other to form a float layer. The floats have holes in the middle for accommodating aquatic plants 3. The floats have first bolt fixing points 5-1 at their corners and connecting member fixing points 5-3 around their perimeter.

[0094] In some embodiments, the floats can be made of lightweight materials such as foam board, polyester fiber, polyethylene, and carbon fiber. Specifically, the floats are made of lightweight HDPE material, 500mm long and 500mm wide, with a single piece capable of bearing more than 10kg. By combining the floats horizontally, the floating island-type water purification device of this application can be applied to large-scale aquatic systems. Specifically, four floats can be grouped together. After the four corners of the four floats are joined together, four-hole gaskets are used to cover the first bolt fixing points 5-1 at the four corners of the floats, and the four fixing points are fixed with hexagonal socket head cap screws to fix the four adjacent floats together, or two adjacent floats can be fixed with gaskets and bolts. Then, several floats are spliced ​​together to form a float layer. In some embodiments, the floats also have a hollowed-out pattern design.

[0095] In some embodiments, the buoyancy device 5 includes at least one float layer. The holes in the upper first float layer can be used to place aquatic plants 3. The body of the connecting member 4 passes through the thickness direction of the upper first float layer and the lower second float layer, and one end of the connecting member 4 is connected to the encapsulation structure 7. The number of floats in the second float layer can be the same as that in the first float layer. After the floats are spliced ​​together to form a float layer, the size of the buoyancy device 5 formed by the upper and lower float layers can be 4m*4m*0.3m.

[0096] The buoyancy device 5 allows the floating island-type water purification device to support more packing material, improving water treatment efficiency. Furthermore, because the buoyancy device 5 has an internal suspended structure, the pores within the structure ensure sufficient root extension and effective oxygenation. Since the buoyancy device 5 provides enough buoyancy to prevent the roots from being completely submerged, both aquatic and terrestrial plants can adapt and grow. Plants grow densely on the carrier through various methods such as seeding and root division. After several growth cycles, the planting density is higher than that of terrestrial planting. Plant roots penetrate the gaps in the buoyancy device 5, reaching a depth of 1.5 meters underwater, maximizing plant absorption and providing food and habitat protection for aquatic animals.

[0097] In some embodiments, the solar power supply system 1 includes solar panels, brackets, combiner boxes, inverters, batteries, etc. The solar panels are mounted on the brackets, and the bottom of the brackets is connected to the buoyancy device 5 by bolts. The controller, battery, and inverter on the solar power system 1 are mounted on the brackets. The controller is electrically connected to the battery, and the inverter is electrically connected to the battery and the aeration device respectively to supply power to the aeration device 8, ensuring the normal operation of the aeration device 8, and achieving the purpose of promoting water flow, increasing dissolved oxygen in the water, and saving energy and reducing consumption.

[0098] Specifically, a DC fuse or circuit breaker can be installed on the line between the inverter and the battery. Specifically, the solar panel is a crystalline silicon panel, 750W, with dimensions of 2384×1303×35mm.

[0099] In some embodiments, the floating island-type water phosphorus removal and purification device further includes a fixing device 11, which is movably connected to the bottom of the encapsulation structure 7 via ropes, so that the floating island-type water phosphorus removal and purification device floats up and down in the water.

[0100] Furthermore, the encapsulation structure 7 is made of stainless steel mesh, and its dimensions are 4m*4m*1.2m. Correspondingly, the filling volume of the adsorption and phosphorus removal filler is 19.0m³. 3 .

[0101] The operation method of the above-mentioned floating island-type water phosphorus removal and purification device is as follows:

[0102] S21: Installation: First, open the encapsulation structure 7, place the aeration device 8 inside the encapsulation structure 7, and fix the aeration device 8 inside with ropes. After filling with the adsorption and phosphorus removal filler 9, release the ropes and other fixing structures, and close the encapsulation structure 7. This ensures that the aeration device 8 is in a stable state during operation. After the connecting component 4 is hooked onto the encapsulation structure 7, the encapsulation structure 7 and the buoyancy device 5 are fixed by passing the connecting component 4 through the buoyancy device 5. Then, place the installed floating island-type water body phosphorus removal and purification device in the water body to be purified.

[0103] S22: Adsorption phosphorus removal: Start the aeration device 8 (aeration pump) to pump water and jet aeration, so that the water enters the jet aeration pump through the phosphorus removal packing in the encapsulation structure 7, and then passes through the jet aeration pipe 10 for jet aeration, forming water convection and aeration. Phosphate in the water is adsorbed on the adsorption packing in the encapsulation structure 7 to remove phosphorus.

[0104] After adsorption and phosphorus removal, the total phosphorus in the water body decreased from 0.21–2.0 mg / L to 0.025–0.2 mg / L.

[0105] To test the adsorption and phosphorus removal efficiency of the above-mentioned device and adsorption phosphorus removal packing at different residence times, this application conducted the following tests:

[0106] Example 1

[0107] A total phosphorus adsorption filter material with a particle size of 2-25 mm was prepared by using 35% 120-mesh gypsum powder and 12% 400-mesh ferric hydroxide as the total phosphorus adsorbent, 35% cement as the binder, 17.5% stone powder as the aggregate, and 0.5% foaming agent.

[0108] I. Static Phosphorus Removal Efficiency Test: Four 5000ml culture flasks, numbered 01, 02, 03, and 04, were used. The phosphorus adsorption packing material was placed into the flasks, and water containing different concentrations of phosphorus was added to each flask for a static adsorption phosphorus removal efficiency test. A 30mL sample was taken every 20 minutes and filtered through qualitative filter paper. Water samples were collected at 0, 20, 40, 60, 80, 100, 120, and 140 minutes, numbered 1# (raw water), 2#…8#. Using GB11893-89, "Determination of Total Phosphorus in Water - Ammonium Molybdate Spectrophotometric Method," the total phosphorus in the raw water and flasks 1#…8# were measured, and the total phosphorus removal rate was calculated (see Table 1).

[0109] Table 1 Total phosphorus removal efficiency at different static adsorption times

[0110]

[0111] II. Dynamic Phosphorus Removal Efficiency Test: Four 5000ml culture flasks, numbered 01, 02, 03, and 04, were used. The phosphorus adsorption packing material was placed into the flasks, and then water containing different concentrations of phosphorus was added. After aeration, a dynamic adsorption phosphorus removal efficiency test was conducted. 30mL samples were taken every 5 minutes and filtered through qualitative filter paper. Water samples were collected at 0, 5, 10, 15, 20, 25, 30, and 35 minutes, and the samples were numbered 1# (raw water), 2#…8#. Using GB11893-89, "Determination of Total Phosphorus in Water Quality—Ammonium Molybdate Spectrophotometric Method," the total phosphorus in the raw water and samples 1#…8# were measured, and the total phosphorus removal rate was calculated (see Table 2).

[0112] The ammonia nitrogen in the raw water and in samples 1#...8# ​​were measured separately, and the removal efficiency was calculated.

[0113] Table 2 Total phosphorus removal efficiency at different times under dynamic conditions

[0114]

[0115] Example 2

[0116] A floating island-type adsorption phosphorus removal packing has a porous structure and comprises 38% by weight of 300-mesh gypsum powder and 10% by weight of 200-mesh iron hydroxide as total phosphorus adsorbent, 35% cement as binder, and 16.5% by weight of 200-mesh stone powder as raw materials.

[0117] Furthermore, a method for preparing adsorption phosphorus removal packing material for a floating island-type water adsorption phosphorus removal and purification device is characterized in that the preparation method includes the following steps:

[0118] S11: Ingredients: 38% by weight of 300-mesh gypsum powder and 10% by weight of 200-mesh ferric hydroxide as total phosphorus adsorbent, 35% by weight of cement as binder and 16.5% by weight of 200-mesh stone powder as aggregate, mixed evenly to form 600 parts of mixture (total weight is calculated as 1000 parts).

[0119] S12: Foaming: Add 0.5 parts by weight of sodium dodecylbenzenesulfonate to 399.5 parts by weight of water and stir thoroughly to produce a large amount of foam;

[0120] S13: Pulping: Add the mixture obtained in S11 to the foaming liquid in S12, stir thoroughly, and prepare a slurry;

[0121] S14: Expansion molding: The slurry prepared by S14 is fed into a molding die to be cross-linked and molded into a porous solid material;

[0122] S15: Crushing: The extruded and cross-linked solids are fed into a crusher for crushing;

[0123] S16: Sieving: The crushed material is sieved to obtain adsorption and phosphorus removal filter media with particle sizes of 2-5mm, 5-10mm, 10-20mm, and 20-40mm.

[0124] The main technical indicators of the obtained phosphorus removal filter media are as follows: the bulk density of the phosphorus removal filter media is 430-650 kg / m³. 3 Specific surface area ≥12.5m² 2 / g, compressive strength ≥3.5MPa, porosity ≥75%, dry density ≤800kg / m³ 3 Water absorption rate ≥35%, particle size range 3-40mm, total phosphorus removal rate 95% (tested on a water sample with a total concentration of 2.0mg / L).

[0125] The above-prepared phosphorus adsorption packing material 9 is applied to a floating island-type water adsorption phosphorus removal and purification device. The operation method of the device is as follows:

[0126] S21: Installation: Select a 4m*4m*1.2m stainless steel mesh enclosure structure 7. First, open the enclosure structure 7, place the aeration pump 8 inside, and fix the aeration pump 8 inside with ropes. After filling with the adsorption and phosphorus removal filler 9, release the ropes and other fixing structures, and close the enclosure structure 7. This ensures that the aeration pump 8 is in a stable state during operation. After the connecting component 4 is attached to the enclosure structure 7, the enclosure structure 7 and the buoyancy device 5 are fixed by passing the connecting component 4 through the buoyancy device 5. Place the installed floating island-type water body phosphorus removal and purification device in the water body to be purified. The buoyancy device 5 has dimensions of 4m*4m*1.2m and consists of 8*8 HDPE floats, each 500mm long and 500mm wide, connected by bolts to form upper and lower float layers, thus forming the buoyancy device 5.

[0127] S22: Adsorption Phosphorus Removal: Start the aeration pump 8. The suction pipe 2 absorbs air above the buoyancy device 5 and introduces the gas into the aeration pump. Then, the gas is discharged from the holes distributed on the jet aeration pipe 10. At the same time, the pumping function of the aeration pump causes the water to enter the aeration pump 8 through the adsorption phosphorus removal packing 9 in the encapsulation structure 7. Then, it is aerated through the jet aeration pipe 10, forming water convection and aeration. Phosphate in the water is adsorbed on the adsorption packing in the encapsulation structure 7, thereby removing the total phosphorus in the water.

[0128] In the above-mentioned floating island-type water adsorption phosphorus removal and purification device, the solar panel is a crystalline silicon solar panel, 750W, with dimensions of 2384×1303×35mm, and there are 2 solar panels.

[0129] After adsorption and phosphorus removal, the total phosphorus in the water can be reduced from 0.21–2.0 mg / L to 0.025–0.2 mg / L.

[0130] Example 3

[0131] A total phosphorus adsorption filter material with a particle size of 2-25 mm was prepared by using 25% 120-mesh gypsum powder and 15% 400-mesh activated diatomaceous earth as the total phosphorus adsorbent, 30% cement as the binder, 29.5% stone powder as the aggregate, and 0.5% foaming agent. The material was expanded, crushed, and sieved. The removal effect on total phosphorus was tested according to the following tests.

[0132] I. Static Phosphorus Removal Efficiency Test: Four 5000ml culture flasks, numbered 01, 02, 03, and 04, were used. The phosphorus adsorption packing material was placed into the flasks, and water containing different concentrations of phosphorus was added to each flask for a static adsorption phosphorus removal efficiency test. A 30mL sample was taken every 20 minutes and filtered through qualitative filter paper. Water samples were collected at 0, 20, 40, 60, 80, 100, 120, and 140 minutes, numbered 1# (raw water), 2#…8#. Using GB11893-89, "Determination of Total Phosphorus in Water - Ammonium Molybdate Spectrophotometric Method," the total phosphorus in the raw water and flasks 1#…8# were measured, and the total phosphorus removal rate was calculated (see Table 1).

[0133] Table 3 Total phosphorus removal efficiency at different static adsorption times

[0134]

[0135]

[0136] II. Dynamic Phosphorus Removal Efficiency Test: Four 5000ml culture flasks, numbered 01, 02, 03, and 04, were used. The phosphorus adsorption packing material was placed into the flasks, and then water containing different concentrations of phosphorus was added. After aeration, a dynamic adsorption phosphorus removal efficiency test was conducted. 30mL samples were taken every 5 minutes and filtered through qualitative filter paper. Water samples were collected at 0, 5, 10, 15, 20, 25, 30, and 35 minutes, and the samples were numbered 1# (raw water), 2#…8#. Using GB11893-89, "Determination of Total Phosphorus in Water Quality—Ammonium Molybdate Spectrophotometric Method," the total phosphorus in the raw water and samples 1#…8# were measured, and the total phosphorus removal rate was calculated (see Table 2).

[0137] The ammonia nitrogen in the raw water and in samples 1#...8# ​​were measured separately, and the removal efficiency was calculated.

[0138] Table 4 Total phosphorus removal efficiency at different times under dynamic conditions

[0139]

[0140] Example 4

[0141] A floating island-type adsorption phosphorus removal packing material has a porous structure. It comprises 38% by weight of 300-mesh gypsum powder and 15% by weight of 200-mesh activated diatomaceous earth as total phosphorus adsorbent, 25% cement as binder, 21.5% by weight of 200-mesh stone powder as aggregate, and 0.5% foaming agent. After expansion molding, crushing, and sieving, it forms an adsorption phosphorus removal filter material with a particle size of 2-25 mm. The removal effect on total phosphorus is tested according to the following tests.

[0142] Furthermore, a method for preparing adsorption phosphorus removal packing material for a floating island-type water adsorption phosphorus removal and purification device is characterized in that the preparation method includes the following steps:

[0143] S11: Ingredients: 38% by weight of 300-mesh gypsum powder as total phosphorus adsorbent, 15% by weight of 200-mesh activated diatomaceous earth as adsorbent, 25% by weight of cement as binder, and 21.5% by weight of 200-mesh stone powder as aggregate, mixed evenly to form 600 parts of mixture (total weight is calculated as 1000 parts).

[0144] S12: Foaming: Add 0.5 parts by weight of sodium dodecylbenzenesulfonate to 399.5 parts by weight of water and stir thoroughly to produce a large amount of foam;

[0145] S13: Pulping: Add the mixture obtained in S11 to the foaming liquid in S12, stir thoroughly, and prepare a slurry;

[0146] S14: Expansion molding: The slurry prepared by S14 is fed into a molding die to be cross-linked and molded into a porous solid material;

[0147] S15: Crushing: The extruded and cross-linked solids are fed into a crusher for crushing;

[0148] S16: Sieving: The crushed material is sieved to obtain adsorption and phosphorus removal filter media with particle sizes of 2-5mm, 5-10mm, 10-20mm, and 20-40mm.

[0149] The main technical indicators of the obtained phosphorus removal filter media are as follows: the bulk density of the phosphorus removal filter media is 430-650 kg / m³. 3 Specific surface area ≥12.5m² 2 / g, compressive strength ≥3.5MPa, porosity ≥75%, dry density ≤800kg / m³ 3 Water absorption rate ≥35%, particle size range 3-40mm, total phosphorus removal rate 95% (tested on a water sample with a total concentration of 2.0mg / L).

[0150] The above-prepared phosphorus adsorption packing material 9 is applied to a floating island-type water adsorption phosphorus removal and purification device. The operation method of the device is as follows:

[0151] S21: Installation: Select a 4m*4m*1.2m stainless steel mesh enclosure structure 7. First, open the enclosure structure 7, place the aeration pump 8 inside, and fix the aeration pump 8 inside with ropes. After filling with the adsorption and phosphorus removal filler 9, release the ropes and other fixing structures, and close the enclosure structure 7. This ensures that the aeration pump 8 is in a stable state during operation. After the connecting component 4 is attached to the enclosure structure 7, the enclosure structure 7 and the buoyancy device 5 are fixed by passing the connecting component 4 through the buoyancy device 5. Place the installed floating island-type water body phosphorus removal and purification device in the water body to be purified. The buoyancy device 5 has dimensions of 4m*4m*1.2m and consists of 8*8 HDPE floats, each 500mm long and 500mm wide, connected by bolts to form upper and lower float layers, thus forming the buoyancy device 5.

[0152] S22: Adsorption-based phosphorus removal aeration: Start the aeration pump 8. The air intake pipe 2 absorbs air above the buoyancy device 5 and introduces the gas into the aeration pump. Then, the gas is discharged from the holes distributed on the jet aeration pipe 10. At the same time, the pumping function of the aeration pump causes the water to enter the aeration pump 8 through the adsorption-based phosphorus removal packing 9 in the encapsulation structure 7, and then undergo jet aeration through the jet aeration pipe 10, forming water convection and aeration. Phosphate in the water is adsorbed on the adsorption packing in the encapsulation structure 7, thereby removing the total phosphorus in the water and increasing the dissolved oxygen in the water.

[0153] In the above-mentioned floating island-type water adsorption phosphorus removal and purification device, the solar panel is a crystalline silicon solar panel, 750W, with dimensions of 2384×1303×35mm, and there are 2 solar panels.

[0154] After adsorption and phosphorus removal, the total phosphorus in the water can be reduced from 0.21–2.0 mg / L to 0.025–0.2 mg / L, and the dissolved oxygen in the water can be increased from 4.5 mg / L to 6.5 mg / L.

[0155] The foregoing description has fully disclosed the specific embodiments of this application. It should be noted that any modifications made to the specific embodiments of this application by those skilled in the art do not depart from the scope of the claims. Accordingly, the scope of the claims is not limited to the foregoing specific embodiments.

Claims

1. An adsorption and phosphorus removal packing material, characterized in that, The phosphorus adsorption packing has a honeycomb-like porous structure. Its raw materials include 10-15% by weight of activated diatomaceous earth and 25-38% by weight of gypsum powder as the total phosphorus adsorbent, or 35-38% by weight of gypsum powder and 10-12% by weight of ferric hydroxide as the phosphorus adsorbent, 20-35% by weight of cement as the binder, 14.5-29.5% by weight of stone powder as aggregate, and 0.5% by weight of foaming agent. The bulk density of the phosphorus adsorption packing is 430-650 kg / m³. 3 Specific surface area ≥ 11.5 m² 2 / g, compressive strength ≥2.5MPa, porosity ≥75%, dry density ≤800kg / m³ 3 Water absorption rate ≥35%, particle size range 5~40mm.

2. The adsorption and phosphorus removal packing material as described in claim 1, characterized in that, The activated diatomaceous earth is a 120-300 mesh powder, the ferric hydroxide is a 200-400 mesh powder, the gypsum powder is a 120-400 mesh powder, and the stone powder is a 200-400 mesh powder.

3. The adsorption and phosphorus removal packing material as described in claim 1, characterized in that, The phosphorus adsorption packing is a porous calcium-based expanded adsorption phosphorus adsorption packing or an iron-based expanded adsorption phosphorus adsorption packing. The raw materials of the porous calcium-based expanded adsorption phosphorus adsorption packing include 10-15% by weight of activated diatomaceous earth as adsorbent, 25-38% by weight of gypsum powder as total phosphorus adsorbent, 25-30% by weight of cement as binder, 21.5-29.5% by weight of stone powder as aggregate, and 0.5% by weight of foaming agent. The phosphorus adsorption packing is an iron-based expanded adsorption phosphorus adsorption packing, the raw materials of which include 35-38% by weight of gypsum powder and 10-12% by weight of ferric hydroxide as phosphorus adsorbent, 20-35% by weight of cement as binder, 14.5-17.5% by weight of stone powder as aggregate, and 0.5% by weight of foaming agent.

4. A method for preparing a phosphorus removal filler, characterized in that, The preparation method of the adsorption and phosphorus removal packing material according to any one of claims 1 to 3 includes the following steps: S11: Ingredients: Provide the activated diatomaceous earth powder or ferric hydroxide, gypsum powder, cement, and stone powder as described in claim 1, and mix them evenly according to a preset ratio to form a mixture of 600 parts (total weight is calculated as 1000 parts). S12: Foaming: Add 0.5 parts by weight of anionic or cationic surfactant to 399.5 parts by weight of water, stir thoroughly to generate a large amount of foam, and form a foaming liquid; S13: Pulping: Add the mixture obtained in S11 to the foaming liquid in S12, stir thoroughly, and prepare a slurry; S14: Expansion molding: The slurry prepared in S13 is fed into a molding die to cross-link and form a porous solid material; S15: Crushing: Porous solid materials formed by puffed cross-linking are fed into a crusher for crushing; S16: Sieving: The crushed material is sieved to obtain the adsorption and phosphorus removal packing with a particle size of 5-40 mm.

5. A floating island-type water phosphorus removal and purification device, characterized in that, The device includes an air intake pipe (2), aquatic plants (3), a buoyancy device (5), a connecting component (4), a buoyancy auxiliary device (6), an encapsulation structure (7), an aeration device (8), an adsorption phosphorus removal packing (9), a jet aeration pipe (10), and a solar power supply system (1). The phosphorus adsorption packing (9) is the phosphorus adsorption packing according to any one of claims 1 to 3; The buoyancy assist device (6) is located on the outer periphery of the buoyancy device (5); the solar energy system (1) is located above the buoyancy device (5) to supply power to the aeration device (8); the buoyancy device (5) is provided with holes (5-2) for accommodating aquatic plants (3); the buoyancy device (5) and the encapsulation structure (7) are detachably connected by the connecting member (4); the encapsulation structure (7) is used to load the aeration device (8) and the phosphorus removal filler (9); one end of the air suction pipe (2) is connected to the air inlet of the aeration device (8), and the other end of the air suction pipe (2) extends out of the buoyancy device (5) and communicates with the atmosphere; the jet aeration pipe (10) is connected to the outlet of the aeration device (8).

6. The floating island-type water phosphorus removal and purification device as described in claim 5, characterized in that, The buoyancy device (4) includes at least two floats, which are connected to each other to form a float layer. The floats have holes in the middle for accommodating aquatic plants (3), and the floats have first bolt fixing points (5-1) at their corners. The floats also have connecting member fixing points (5-3) around their perimeter.

7. The floating island-type water phosphorus removal and purification device as described in claim 6, characterized in that: The buoyancy device (4) includes at least one float layer, the upper first float layer can be used to place aquatic plants (3), the body of the connecting member (4) passes through the thickness direction of the upper first float layer and the lower second float layer, and one end of the connecting member (4) is connected to the encapsulation structure (7).

8. The floating island-type water phosphorus removal and purification device as described in claim 4, characterized in that: The solar power supply system (1) includes a solar panel, a bracket, a controller, and an inverter. One end of the bracket is connected to the solar panel, and the other end of the bracket is connected to the buoyancy device (4). The solar power supply system (1) is electrically connected to the aeration device (8).

9. A floating island-type water purification and phosphorus removal device according to claim 4, characterized in that, The sidewall of the encapsulation structure (7) is a mesh structure, and one end of the connecting member (4) is attached to the top edge of the mesh structure.

10. A method of using a floating island-type water phosphorus removal and purification device, characterized in that, The operation method of the floating island-type water phosphorus removal and purification device according to any one of claims 5 to 9 is as follows: S21: Installation: The aeration device (8) and the adsorption phosphorus removal packing (9) are enclosed in the encapsulation structure (7). After the connecting member (4) is hooked to the encapsulation structure (7), the connecting member (4) is passed through the buoyancy device (5) to fix the encapsulation structure (7) and the buoyancy device (5). The installed floating island type water body phosphorus removal and purification device is placed in the water body to be purified. S22: Adsorption phosphorus removal: Start the aeration device (8) to make the water body form convection, use the jet aeration pipe (10) to perform jet aeration, form water body convection and aeration, the phosphorus-containing water body convection passes through the phosphorus removal packing, the packing adsorbs phosphate in the water body; after adsorption phosphorus removal, the total phosphorus in the water body is reduced from 0.21~1.5mg / L to below 0.2mg / L.

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