KR20230148471A - Solar water purification system using phosphorous insolubilizing - Google Patents

Abstract

The water purification device includes a support unit capable of floating on the water surface, a reaction tank connected to the support unit and providing a first reaction space in which the first reaction between the coagulant supplied from the outside and the phosphate contained in the water occurs, and the support unit. A spray unit connected and equipped to generate a second reaction with hydroxide salt contained in water adjacent to the reaction tank by spraying the coagulant discharged from the reaction tank, a measuring unit for measuring the amount of dissolved oxygen in the reservoir, and the measuring unit It includes a control unit that controls whether to supply the coagulant to the first reaction tank and the operation of the spray unit using the dissolved oxygen amount data measured from.

Description

Solar water purification system through phosphorus insolubilization {SOLAR WATER PURIFICATION SYSTEM USING PHOSPHOROUS INSOLUBILIZING}

Embodiments of the present invention relate to a solar water purification system through phosphorus insolubilization. More specifically, it relates to a solar water purification device that can purify water using phosphorus insolubilization technology that precipitates dissolved phosphorus using a coagulant.

Eutrophication is occurring in coastal oceans, lakes, rivers, and reservoirs due to excessive influx and accumulation of organic matter. In particular, as domestic sewage, livestock wastewater, and factory wastewater flow into reservoirs and reservoirs, reservoirs become rich in phosphorus (PHOSPHORUS).

When phosphorus becomes abundant, algae grows and reproduces very quickly, causing green algae, which gives the water a green appearance. Green algae caused by overcrowding of algae blocks the supply of atmospheric oxygen to the water, making it difficult for creatures living in the water to survive.

Conventionally, to eliminate green algae, red clay was spread on the water surface, causing the algae and red clay to form flocs and settle. However, this is only a stopgap measure taken after green algae occurs.

Therefore, when the amount of dissolved oxygen is significantly reduced due to the occurrence of algae, a water purification device is required that can detect this, prevent a serious green algae phenomenon from occurring in advance, and purify water quality through this.

The present invention was devised to improve these conventional problems and aims to provide a solar water purification device through phosphorus insolubilization to prevent green algae in advance.

The water purification device according to the present invention for achieving the above object includes a support unit capable of floating on the water surface, connected to the support unit, and a first reaction in which a first reaction occurs between the coagulant supplied from the outside and the phosphate contained in the water. A reaction tank providing a space, a spraying unit connected to the support unit and equipped to generate a second reaction with hydroxide salt contained in water adjacent to the reaction tank by spraying the coagulant discharged from the reaction tank, dissolved in the reservoir It includes a measuring unit that measures the amount of oxygen, and a control unit that controls whether to supply the coagulant to the first reaction tank and the operation of the spray unit using the dissolved oxygen amount data measured from the measuring unit.

In one embodiment of the present invention, the reaction tank may be made of a porous material.

In one embodiment of the present invention, the support unit may include a microbial contact media therein.

In one embodiment of the present invention, the reaction tank can collect the phosphoric acid precipitate formed through the first reaction.

In one embodiment of the present invention, the spraying unit is connected to the reaction tank, a discharge line for discharging the coagulant from the reaction tank, a stirrer provided inside the discharge line and stirring the coagulant, the discharge line, and It is provided between the reaction tanks, and may include a pump that pumps the coagulant into the reaction tank, and a spray nozzle that is arranged along the extension direction of the discharge line and sprays the coagulant.

In one embodiment of the present invention, a solar power generation unit is disposed on the upper part of the support unit and is provided to generate power using sunlight to supply power to the spraying unit and the measuring unit. It can be.

Here, a circulation unit may be provided that receives power from the solar power generation unit, circulates water, and supplies air below the water surface of the reservoir.

In one embodiment of the present invention, the support unit includes hexagonal surface parts having vertical flat surfaces connected to each other in the vertical direction, and a module panel support unit formed on the upper part of the hexagonal surface parts to support the solar cell module. , a first coupling part formed to have a protrusion or groove shape on the upper part of the hexagonal surface parts, a second coupling part formed in a shape opposite to the first coupling part so as to be coupled to the first coupling part at the lower part of the hexagonal surface parts, and the It includes a plurality of fastening protrusions protruding in a horizontal direction perpendicular to the vertical direction from each corner between the hexagonal face portions, and each of the fastening protrusions is located in each of the recess grooves formed to be recessed inward of the corners. It is made up of a plurality of assembled units,

The assembly units are provided to entirely surround the reaction tank.

The water purification device according to the present invention configured as above includes a reaction tank, a spraying unit, and a measuring unit. In the reaction tank, a first reaction for phosphorus insolubilization is performed, and the spraying unit sprays the coagulant in a wide area adjacent to the reaction tank, so that a second reaction for phosphorus insolubilization can additionally occur in a wide area. Furthermore, by uniformly spraying the coagulant over a wide area, the spraying unit can suppress a rapid decrease in the local pH value of water.

Additionally, the measuring unit can measure the amount of dissolved oxygen in water. For example, when the measurement unit determines that the dissolved oxygen concentration is below a certain standard value, the spray unit is driven to spray the coagulant from the reaction tank before the green algae phenomenon occurs. As a result, green algae phenomenon can be prevented in advance.

1 is a block diagram showing a water purification device according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing a water purification device according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view showing the support unit and solar power generation unit of FIG. 1.
FIG. 4 is a cross-sectional view illustrating units constituting the support unit of FIG. 1.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. Since the present invention can be subject to various changes and can have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components. In the attached drawings, the dimensions of the structures are enlarged from the actual size for clarity of the present invention.

Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

1 is a block diagram showing a water purification device according to an embodiment of the present invention. Figure 2 is a cross-sectional view showing a water purification device according to an embodiment of the present invention.

1 and 2, the water purification device according to an embodiment of the present invention includes a support unit 110, a reaction tank 120, a spray unit 130, a measurement unit 170, and a control unit 160. Includes. The water purification device 1000 enables phosphorus insolubilization treatment using a coagulant.

A support unit 110 capable of floating on the water surface is provided. The support unit 110 may have various shapes by assembling a plurality of polygonal units. The support unit 110 has a hollow interior and is therefore capable of floating on water. The support unit 110 will be described later.

The reaction tank 120 is connected to the support unit 110. For example, the reaction tank 120 may be provided to be surrounded by a support unit 120. The reaction tank 120 provides a first reaction space 125 that can accommodate the coagulant. A first reaction may occur within the first reaction space 125 in which the coagulant supplied into the reaction tank 120 and the phosphate contained in the water react.

The reaction tank 120 may temporarily accommodate the coagulant while floating in the water phase. Therefore, when the coagulant is needed, the spraying unit 130 can temporarily spread the coagulant supplied from the reaction tank 120 over a wider area.

The coagulant may include aluminum sulfate (Al ₂ (SO ₄ ) ₃ ). In this case, the aluminum sulfate is called alumina sulfate.

The coagulant is dissolved in water and exists as aluminum ions. The aluminum ion combines with the phosphate ion and exists in the form of an aluminum phosphate salt in a stable state with relatively low solubility. At this time, the aluminum phosphate salt precipitates as an insoluble precipitate, so that the dissolved aluminum ions can be easily precipitated and removed.

Furthermore, the aluminum phosphate salt may be deposited on poor quality surfaces. In this case, the deposited aluminum phosphate salt can implement the so-called blanket effect, which blocks phosphate ions generated during the decomposition of organic matter deposited in the bottom from flowing into the water.

The spraying unit 130 is connected to the support unit 110. The spraying unit 130 is provided to spray the coagulant discharged from the reaction tank 120. As a result, a second reaction may occur with the hydroxide salt contained in the water adjacent to the reaction tank 120.

At this time, since aluminum ions have a relatively low solubility in neutral, a second reaction may occur in which they combine with hydroxide ions in water and precipitate as aluminum hydroxide (Al(OH) ₃ ). At this time, aluminum hydroxide may precipitate by including suspended matter in water while forming a floc with a relatively less dense structure. In other words, as the floc containing underwater algae and floating sediment particles settles, suspended underwater matter (algae or floating sediment) can be removed together.

Meanwhile, the coagulant may include multivalent metal cations, such as Al3+, Ca2+, and Fe3+, and the coagulant neutralizes the negative charge on the surface of particles of suspended substances in water, thereby eliminating the repulsive force between particles. so that they can cohere together. At this time, as the size of the aggregated particles increases, the sedimentation speed of the particles in water increases, so they can be easily sedimented and removed. That is, the coagulant neutralizes the surfaces of suspended substances in water so that they can settle.

The spraying unit 130 sprays the coagulant in a wide area adjacent to the reaction tank 120, so that the second reaction can occur in a wide area. Furthermore, the spraying unit 130 uniformly sprays the coagulant over a wide area, thereby suppressing a rapid decrease in the local pH value of the water. In particular, when the coagulant is sprayed locally in excessive amounts and the pH is lower than 6, the solubility of the dissolved inorganic aluminum salt increases, causing the inorganic aluminum salt to be absorbed into the gill surface of the fish and precipitate on the gill surface, interfering with the breathing of the fish. It can happen.

As the spraying unit 130 uniformly sprays the coagulant over a relatively wide area, pH can be suppressed from reaching 6 or lower.

The measurement unit 170 can measure the amount of dissolved oxygen in water. For example, when the measurement unit 170 determines that the dissolved oxygen concentration is less than a certain standard value (e.g., 2 mg/L, etc.), the spray unit is driven to spray the coagulant from the reaction tank before the occurrence of green algae. As a result, green algae phenomenon can be prevented in advance.

At this time, the dissolved oxygen concentration (DO) is expressed in units of mg/L or ppm, and the value is obtained using a dissolved oxygen sensor.

Since the DO concentration saturation value decreases as the temperature increases, the DO concentration saturation value is low at high temperatures, and the DO concentration saturation value is high at low temperatures. Therefore, as the atmospheric temperature rises, the amount of oxygen that can dissolve in the water decreases. As the water temperature rises from late summer to fall, the dissolved oxygen in slow-flowing rivers and coastal seawater decreases, creating an unfavorable habitat environment for living fish, shellfish and aerobic microorganisms. Fish typically have difficulty surviving below 2 mg/L.

“Green algae phenomenon” refers to a phenomenon in which floating algae (phytoplankton) multiply in large quantities and accumulate on the water surface in eutrophic lakes or rivers with slow flow and accumulate, causing the water color to noticeably change to green.

Planktonic algae in natural ecosystems play a role as primary producers in the food chain and provide carbon and energy sources to consumers and decomposers.

However, due to the excessive influx of nutrients into the river or the increase in water temperature in slow-flowing rivers from late summer to fall, the surface and bottom layers are mixed (tumbling phenomenon, up-and-down movement), causing nutrients in the bottom layer to move to the surface layer, resulting in an abundance of nutrients. As a result, green algae and blue-green algae rapidly increase. The density of the air adjacent to the hot vertical plate decreases, causing the cold air away from the vertical plate to move toward the vertical plate, creating a velocity gradient. In other words, the surface water temperature of the river rises due to sunlight, lowering the density, and a conduction phenomenon (up and down movement) occurs in which the inner layer water under the surface water with a lower water temperature moves toward the surface water, which is a natural phenomenon caused by the density difference caused by sunlight in the area adjacent to the surface water. Water circulation occurs as a convection phenomenon.

In particular, when the flow of the river is slow and continues until the heat wave, the temperature of the water in the impounded river rises rapidly and green algae occurs, the toxic substances and odors produced cause a strong odor in the river, and in severe cases, the water in the impounded river There is a problem in that fish living in rivers die en masse due to oxygen depletion, accelerating river pollution. Therefore, preventing green algae in advance is important for protecting the ecosystem.

The control unit 160 may control whether to supply a coagulant to the reaction tank 120 and drive the spray unit 130 using the dissolved oxygen amount data measured from the measurement unit 170.

In one embodiment of the present invention, the reaction tank 120 may be made of a porous material. As a result, water can easily permeate into the reaction tank 120. As an example of the porous material, a porous acrylic material may be used.

In one embodiment of the present invention, the support unit 110 may include a microbial contact media therein. The support unit 110 can purify water quality through a trickling filter method. According to the trickling filter method, the fluid is sprayed on a contact media such as crushed stone or other media layer covered with a mucous membrane of microorganisms to bring the biofilm into contact with the organic matter in the wastewater. Here, the general biofilm layer (slime layer) mainly consists of bacteria, protozoa, and fungi. If the environment is good, higher animals such as sludge worms, fly larvae, and rotifers may also exist. However, the unit structures are stacked. When a trickling filter process is performed, the development of larvae such as flies can be suppressed.

In one embodiment of the present invention, the spraying unit 130 may include a discharge line 131, an agitator 133, a pump 135, and a spray nozzle 137.

The discharge line 131 is connected to the reaction tank 120 and provides a flow path through which the coagulant can be discharged from the reaction tank 120.

The stirrer 133 is provided inside the discharge line 131. The stirrer 133 can stir the coagulant. For example, the stirrer 133 may include an impeller, screw, etc.

The pump 135 is provided between the discharge line 131 and the reaction tank 120. The pump may pump the coagulant from the reaction tank 120.

The spray nozzle 137 is arranged along the extension direction of the discharge line 131. The spray nozzle 137 may spray the coagulant in the form of bubbles. Thereby, the second reaction can effectively occur by exposing the coagulant to air, especially oxygen.

The solar power generation unit 150 is provided on the support unit 110. That is, the support unit 110 can support the solar power generation unit 150. The solar power generation unit 150 produces power using solar energy. Accordingly, the solar power generation unit 150 can supply electricity to the spraying unit 130.

The solar power generation unit 150 will be described later with reference to FIGS. 3 and 4.

The circulation unit 140 may receive power from the solar power generation unit to circulate water and supply air to the bottom. this

The circulation unit 140 is provided below the spraying unit 130. The circulation unit 140 may include a flow pipe 141 that provides a flow path for water to rise downward.

FIG. 3 is a cross-sectional view showing the support unit and solar power generation unit of FIG. 1. FIG. 4 is a cross-sectional view illustrating units constituting the support unit of FIG. 1.

Referring to FIGS. 3 and 4 , the panel support unit includes a first unit structure 200, a second unit structure 300, a fastening member 400, and an inclined support body 500.

The first and second unit structures 200 and 300 have the same structure, and each includes polygonal facets 210, a support plate 220, a first coupling portion 230, a second coupling portion 240, and Includes a fastening protrusion 250.

The polygonal surface portions 210 have six vertical flat surfaces 212, 213, 214, 215, 216, and 217 connected to each other in the vertical direction to form a hollow 211 penetrating upward and downward in the center. Specifically, the polygonal portions 210 may have a column structure, and in this embodiment, a hexagonal column will be used as an example. Accordingly, the first and second unit structures 200 and 300 have a structure in which any one of the vertical flat surfaces 212, 213, 214, 215, 216, and 217 faces each other.

In addition, the polygonal portions 210 may have a jacket portion 218 filled with a material that can float in water, such as air, so that it can float in water. Accordingly, the assembly 100 according to the present invention can be used for amphibious and amphibious inspection through the jacket portion 218.

The support plate 220 is formed on top of the polygonal portions 210 to support the solar cell panel 10. At this time, the support plate 220 supports the inclined support 500, which will be described in detail below, in order to support the solar cell panel 10 at an angle. Accordingly, the support plate 220 may include a guide groove 222 so that the position of the inclined support 500 can be guided and properly supported. Here, the guide groove 222 may be circular, as shown in FIG. 3, for example.

The first coupling part 230 is formed in a groove shape on the upper part of the polygonal surface parts 210. In this case, the first coupling portion 230 may be a guide groove 222 of the support plate 220 in terms of its actual structure. In contrast, the first coupling portion 230 may be formed in the shape of a protrusion protruding from the top of the polygonal surface portions 210.

The second coupling portion 240 has a shape opposite to the first coupling portion 230 so as to be coupled to the first coupling portion 230 at the lower portion of the polygonal surface portions 210. Specifically, the first coupling portion 240 has a shape opposite to that of the first coupling portion 230. As 230 is formed in a groove or protrusion shape, on the contrary, it may be formed in a protrusion or groove shape. In this case, the plurality of first unit structures ( As the 200) can be stably stacked, the height of the assembly 100 can be adjusted, and storage and transportation can be carried out more safely and easily.

The fastening protrusions 250 are provided to protrude from the polygonal surface portions 210 in a horizontal direction perpendicular to the vertical direction. Specifically, since the first and second unit structures 200 and 300 have a structure in which any one of the vertical flat surfaces 212, 213, 214, 215, 216, and 217 faces each other, they are assembled together. , the fastening protrusions 250 may be provided to protrude from the edges of the polygonal surface portions 210 so as not to substantially interfere with the vertical flat surface 212 facing the surface. At this time, recess grooves 219 that are recessed inward may be formed at the corners of the polygonal surface portions 210 to prevent interference due to the size of the fastening protrusions 250. According to the structure of the fastening protrusions 250, when the first and second unit structures 200 and 300 are assembled, each fastening protrusion 250 is present at both edges of the facing vertical flat surface 212. They have a structure in which they are combined with each other. At this time, the fastening protrusions 250 that are coupled to each other are positioned at any of the first or second unit structures 200 and 300 so that the height of the assembled first and second unit structures 200 and 300 is maintained constant. One can protrude so that the upper surface matches the height, and the other one can protrude so that the lower surface matches. A fastening groove 252 penetrating in the vertical direction is formed in each of these fastening protrusions 250.

The fastening member 400 is attached to both edges of the vertical flat surface 212 so that the first and second unit structures 200 and 300 are assembled while the first and second unit structures 200 and 300 are in contact with one of the vertical flat surfaces 212. The fastening protrusions 250 coupled at the fields are fastened. Specifically, the fastening member 400 penetrates the fastening groove 252 formed on the coupled fastening protrusions 250 and fastens them. Hereinafter, with additional reference to FIG. 4, a structure in which the fastening member 400 is inserted into and fastened to the fastening grooves 252 of the coupled fastening protrusions 250 will be described in more detail.

Additionally, each of the first and second unit structures 200 and 300 may further include a bottom portion 260 formed in the hollow 211. A through hole 262 penetrating in the vertical direction may be formed in the bottom portion 260. Accordingly, when the assembly 100 of the first and second unit structures 200 and 300 is installed in general soil, external air is naturally ventilated through the through hole 262, allowing plants to grow in an environmentally friendly manner. An environment where this can happen can be created. On the other hand, when the assembly 100 is installed floating in the sea through the jacket portion 218 of the polygonal portions 210, the resistance due to waves generated from the sea is Damage due to this can be prevented by partially absorbing it in the through hole 262. Additionally, when the assembly 100 is installed in a wetland, a wetland layer (not shown) that provides environmentally friendly elements can be created by receiving nutrients from the wetland through the through hole 262.

Meanwhile, each of the first and second unit structures 200 and 300 may further include a stirring unit 270 installed under the bottom 260 for a convection phenomenon. In this way, the functions according to the flow of external air through the through hole 262, the resistance of waves, and the supply of nutrients from the wetland can be further improved through the agitator 270.

As shown, the stirring unit 270 may be provided in the first and second unit structures 200 and 300, respectively. Alternatively, the stirring unit 270 may be installed in only one of the first and second unit structures 200 and 300.

In addition, each of the first and second unit structures 200 and 300 may further include an attachment portion 280 to which fiber yarns are attached to generate microorganisms at the lower portion of the bottom portion 260. In this case, when the assembly 100 in which the first and second unit structures 200 and 300 are assembled is installed near water that is likely to be contaminated, such as a wetland, the fiber yarn 20 attached to the attachment portion 280 Water quality can be naturally purified through the microorganisms produced.

The inclined support 500 is assembled to the guide groove 222 formed on the upper part of the support plate 220 of the first unit structure 200. This inclined support 500 supports the solar cell panel 10 at an angle so that it can be exposed to sunlight almost vertically at a latitude of about 38 degrees, such as in Korea.

Accordingly, the second unit structure 300 may include a stopper 310 formed to prevent the solar cell panel 10 supported on the inclined support 500 from being separated from the inclined support 500 by gravity. there is. At this time, the second unit structure 300 has substantially the same structure so that it can be used interchangeably with the first unit structure 200, so even if the stopper 310 does not perform its function, it can be used interchangeably with the first unit structure 200. It can also be formed in (200). For example, the stopper 310 is formed in a 'C' shape and can be fastened to one side of the solar cell panel 10 in the form of a clip.

In addition, the inclined support 500 has a clip 12 fastened to the end of the solar cell module 10 at the top, and a fixing part for fixing the solar cell panel 10 in an inclined state ( 510) may be included. Here, the fixing part 510 may have a protrusion shape on which the clip 12 hangs, and may be made of a nut and bolt fastening structure to facilitate disassembly and installation as needed.

In addition, the fixing part 510 is formed in a 'C' shape and can be fastened to one side of the solar cell panel 10 in a clip format.

In this way, the unit structure of the assembly 100 supporting the solar cell panel 10 is a polygonal structure having six vertical flat surfaces (212, 213, 214, 215, 216, 217) connected to each other in the vertical direction. Including the face parts 210, when they are joined while facing each other on any one of the vertical flat surfaces 212, some space can be secured on the left and right sides, so expansion and contraction due to external shock or external temperature changes The stress generated by can be distributed to the secured space. Accordingly, it is possible to fundamentally prevent the unit structure from being damaged due to concentration of stress.

In the above, the present invention has been described based on preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. This is possible.

Claims (8)

A support unit capable of floating on the water surface;
a reaction tank connected to the support unit and providing a first reaction space in which a first reaction between an externally supplied coagulant and phosphate contained in water occurs;
a spraying unit connected to the support unit and configured to generate a second reaction with hydroxide salt contained in water adjacent to the reaction tank by spraying the coagulant discharged from the reaction tank;
a measuring unit that measures the amount of dissolved oxygen in the reservoir; and
A water purification device using phosphorus insolubilization, comprising a control unit that controls whether to supply a coagulant to the first reaction tank and the operation of the spray unit using the dissolved oxygen amount data measured from the measurement unit. The water purification device according to claim 1, wherein the reaction tank is made of a porous material. The water purification device according to claim 1, wherein the support unit includes a microbial contact media therein. The water purification device according to claim 1, wherein the reaction tank is equipped to collect phosphoric acid precipitate formed through the first reaction. The method of claim 1, wherein the spraying unit,
A discharge line connected to the reaction tank and discharging the coagulant from the reaction tank;
A stirrer provided inside the discharge line to stir the coagulant;
a pump provided between the discharge line and the reaction tank and pumping the coagulant into the reaction tank; and
A water purification device arranged along the extension direction of the discharge line and comprising a spray nozzle that sprays the coagulant. The method of claim 1, further comprising a solar power generation unit disposed on the support unit and capable of producing power using sunlight to supply power to the spraying unit and the measuring unit. A water purification device. The water purification device according to claim 6, comprising a circulation unit that receives power from the solar power generation unit to circulate water and supply air below the water surface of the reservoir. The method of claim 1, wherein the support unit:
Hexagonal face portions having vertical flat surfaces connected to each other in the vertical direction, a module panel support formed on top of the hexagonal face portions to support the solar cell module, and formed to have a protrusion or groove shape on the top of the hexagonal face portions. With respect to the vertical direction from each corner between the first coupling part, the second coupling part formed in the opposite shape of the first coupling part so as to be coupled to the first coupling part at the lower part of the hexagonal surface parts, and the hexagonal surface parts, It includes a plurality of fastening protrusions protruding in a vertical or horizontal direction, wherein each of the fastening protrusions is composed of a plurality of assembly units positioned in each of the recess grooves formed to be recessed inward of the edge,
A water purification device, characterized in that the assembly units are provided to entirely surround the reaction tank.

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