A microplastic cascade treatment device for tap water

Abstract

This invention discloses a tiered treatment device for microplastics in tap water, comprising a tiered filtration device, a magnetic adsorption device, a photocatalytic degradation device, and a cleaning water collection device. The magnetic adsorption device includes at least one rotatable electromagnetic adsorption mesh. The inlet of the electromagnetic adsorption mesh is connected to the outlet of the tiered filtration device, and the outlet of the electromagnetic adsorption mesh is connected to the cleaning water collection device. The outlet of the cleaning water collection device flows back to the inlet of the magnetic adsorption device. The photocatalytic degradation device includes several groups of photocatalytic units evenly distributed circumferentially outside the electromagnetic adsorption mesh. Adjacent photocatalytic units form flow channels corresponding to the outer side of the electromagnetic adsorption mesh. A photocatalyst is disposed on the photocatalytic unit. This invention can perform tiered treatment of microplastic particles in tap water through filtration, magnetic adsorption, and photocatalytic degradation, effectively reducing the content of microplastic particles in the water.

Description

Technical Field

[0001] This invention belongs to the technical field of water microplastic treatment, and relates to a cascade treatment device for tap water microplastics. Background Technology

[0002] The widespread use of plastic products has led to a significant increase in the concentration of microplastic particles in tap water. Once the concentration of microplastic particles in tap water reaches a certain level, it will threaten the ecological environment and human health.

[0003] Existing technologies for removing microplastics from tap water mainly involve chemical and physical removal methods. Chemical removal involves adding specific agents to the tap water to react with microplastic particles, thus removing them. However, this method introduces new chemical substances into the tap water, requiring further treatment after the microplastics are removed, increasing the time and cost of the removal process. Physical removal involves using filtration and adsorption devices to filter and adsorb microplastic particles from the tap water. However, due to the small particle size of microplastics in tap water and their mixing with other solid impurities, existing filtration and adsorption devices are not efficient enough in removing microplastics from tap water.

[0004] Therefore, in view of the above-mentioned defects in existing technologies for removing microplastic particles from tap water, this invention discloses a cascade treatment device for microplastics in tap water. Summary of the Invention

[0005] The purpose of this invention is to provide a tiered treatment device for microplastics in tap water, which can perform tiered treatment of microplastic particles in tap water through filtration, magnetic adsorption, and photocatalytic degradation, effectively reducing the content of microplastic particles in the water.

[0006] This invention is achieved through the following technical solution:

[0007] A cascaded treatment device for microplastics in tap water includes a cascaded filtration device, a magnetic adsorption device, a photocatalytic degradation device, and a cleaning water collection device. The magnetic adsorption device includes at least one rotatable electromagnetic adsorption mesh. The inlet of the electromagnetic adsorption mesh is connected to the outlet of the cascaded filtration device, and the outlet of the electromagnetic adsorption mesh is connected to the cleaning water collection device. The outlet of the cleaning water collection device flows back to the inlet of the magnetic adsorption device. The photocatalytic degradation device includes several groups of photocatalytic sections evenly distributed circumferentially outside the electromagnetic adsorption mesh. Adjacent photocatalytic sections form flow channels corresponding to the outer side of the electromagnetic adsorption mesh. A photocatalyst is disposed on each photocatalytic section.

[0008] First, the microplastic particles in the water are filtered through a cascade filtration system. The water then enters a magnetic adsorption device, where biomagnetic carbon powder is added. This powder fully coats the surface of the microplastic particles in the tap water. Next, the electromagnetic adsorption mesh in the magnetic adsorption device adsorbs the microplastic-coated carbon powder, thus performing a secondary treatment. The magnetically adsorbed water then enters a photocatalytic degradation device, where the photocatalytic unit photocatalyzes and degrades any remaining microplastic particles, achieving a tertiary treatment of the microplastics in the water.

[0009] To better realize the present invention, the magnetic adsorption device further includes a dosing cylinder and an adsorption cylinder, and a magnetic carbon powder dosing device connected in sequence. The dosing cylinder is connected to the magnetic carbon powder dosing device, and a stirring part is provided inside the dosing cylinder. An electromagnetic adsorption mesh is provided inside the adsorption cylinder, and a driving part for rotating the adsorption cylinder is provided on one side of the outside of the adsorption cylinder.

[0010] To better realize the present invention, the adsorption cylinder is further provided with a central vortex section inside, which is used to transport the water flowing through the adsorption cylinder to the electromagnetic adsorption net in a vortex direction.

[0011] To better realize the present invention, the photocatalytic degradation device further includes an inner cylinder and an outer cylinder. The inner cylinder is coaxially sleeved outside the adsorption cylinder. A flow passage hole is provided on the cylinder wall of the inner cylinder, and an electromagnetic valve is provided at the flow passage hole. The outer cylinder is coaxially sleeved outside the inner cylinder, and a plurality of photocatalytic units are evenly distributed circumferentially between the inner cylinder and the outer cylinder.

[0012] To better realize the present invention, the photocatalytic unit further includes a photocatalytic plate and a light source. A photocatalyst is provided on any surface of the photocatalytic plate that is in contact with the water flow, and the light source is provided on the surface of the photocatalytic plate that is in contact with the water flow.

[0013] To better realize the present invention, the stepped filtration device further includes a filter cylinder, a screen section, and a membrane filtration section. The screen section and the membrane filtration section are arranged sequentially inside the filter cylinder along the water flow direction. The screen section includes several levels of screens with progressively smaller pore sizes.

[0014] To better realize the present invention, the cleaning water collection device further includes a collection tank and an electromagnetic adsorption unit. The inlet of the collection tank is connected to the outlet of the magnetic adsorption device through a pipeline with a solenoid valve, and the bottom of the collection tank is provided with an electromagnetic adsorption unit.

[0015] To better realize the present invention, the collection box is further provided with a return pump, which is used to return the water inside the collection box to the inlet of the magnetic adsorption device.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] This invention employs a tiered filtration system to perform primary filtration of microplastic particles in water, removing particles with a diameter greater than or equal to 0.1 mm. Next, biomagnetic carbon powder is added to the water to coat the microplastic particles, which are then adsorbed by an electromagnetic adsorption mesh in a magnetic adsorption device, further removing microplastic particles with a diameter between 50 μm and 0.1 mm. The water then passes through a photocatalytic degradation device, where residual microplastic particles are catalytically degraded, effectively reducing the microplastic particle content in the water. Finally, the used biomagnetic carbon powder is collected by a washing water collection device, enabling its recycling. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a plastic cascade water treatment device for tap water.

[0019] Figure 2 This is a schematic diagram of a cascade filtration device;

[0020] Figure 3 This is a schematic diagram of the magnetic adsorption device.

[0021] Figure 4 This is a schematic diagram of the photocatalytic degradation device;

[0022] Figure 5 This is a schematic diagram of the cleaning water collection device.

[0023] Wherein: 1-Step filtration device; 2-Magnetic adsorption device; 3-Photocatalytic degradation device; 4-Washing water collection device; 11-Filter cartridge; 12-Screen section; 13-Membrane filtration section; 21-Electromagnetic adsorption screen; 22-Dosing cartridge; 23-Adsorption cartridge; 24-Dosing device; 25-Stirring section; 26-Drive section; 27-Central vortex section; 31-Photocatalytic section; 32-Inner cylinder; 33-Outer cylinder; 41-Collection box; 42-Electromagnetic adsorption section. Detailed Implementation

[0024] The following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] For ease of description, the words "up," "down," "left," and "right" appearing in this invention only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] Example 1:

[0029] This embodiment provides a tap water plastic cascade treatment device, such as... Figure 1 As shown, the device includes a cascade filtration device 1, a magnetic adsorption device 2, a photocatalytic degradation device 3, and a cleaning water collection device 4. The magnetic adsorption device 2 includes at least one rotatable electromagnetic adsorption net 21. The inlet of the electromagnetic adsorption net 21 is connected to the outlet of the cascade filtration device 1, and the outlet of the electromagnetic adsorption net 21 is connected to the cleaning water collection device 4. The outlet of the cleaning water collection device 4 flows back to the inlet of the magnetic adsorption device 2. The photocatalytic degradation device 3 includes several groups of photocatalytic sections 31 evenly distributed around the outside of the electromagnetic adsorption net 21. Adjacent photocatalytic sections 31 form flow channels that correspond to and connect to the outside of the electromagnetic adsorption net 21. A photocatalyst is disposed on the photocatalytic section 31.

[0030] The water first passes through a cascade filtration device 1, which filters out large particles and microplastic particles, removing microplastic particles with a diameter of 0.1 mm or greater. The water then enters a magnetic adsorption device 2, where biomagnetic carbon powder is added through the dosing end. The biomagnetic carbon powder coats the microplastic particles, which are then adsorbed by the electromagnetic adsorption mesh 21 in the magnetic adsorption device 2, removing microplastic particles with a diameter of 50 μm to 0.1 mm. Finally, a portion of the water flows through a channel between adjacent photocatalytic units 31, where the remaining microplastic particles undergo photocatalytic degradation. When the biomagnetic carbon powder adsorbed on the electromagnetic adsorption net 21 reaches the set adsorption amount, the electromagnetic adsorption net 21 is de-energized, and the flow channel between the photocatalytic units 31 is closed. At this time, the electromagnetic adsorption net 21 loses its magnetism, and the biomagnetic carbon powder adsorbed on the electromagnetic adsorption net 21 falls off and flows with the water to the cleaning water collection device 4. The cleaning water collection device 4 adsorbs and recovers the biomagnetic carbon powder, and at the same time, the water flows back to the inlet of the magnetic adsorption device 2 through the outlet of the cleaning water collection device 4 to participate in the magnetic adsorption of microplastics again.

[0031] Example 2:

[0032] A tap water plastic cascade treatment device, improved based on Example 1, such as... Figure 3 As shown, the magnetic adsorption device 2 includes a dosing cylinder 22 and an adsorption cylinder 23, and a magnetic carbon powder dosing device 24 connected in sequence. The dosing cylinder 22 is connected to the magnetic carbon powder dosing device 24. A stirring part 25 is provided inside the dosing cylinder 22. An electromagnetic adsorption mesh 21 is provided inside the adsorption cylinder 23. A driving part 26 for rotating the adsorption cylinder 23 is provided on one side of the outside of the adsorption cylinder 23. A through hole is provided on the adsorption cylinder 23 to communicate with the flow channel between the adjacent photocatalytic part 31.

[0033] Biomagnetic carbon powder is added to the dosing cylinder 22 via the dosing device 24, and the water mixed with the biomagnetic carbon powder is stirred by the stirring unit 25, ensuring that the biomagnetic carbon powder and microplastic particles in the water are fully mixed and coated, thereby ensuring the subsequent adsorption effect on microplastic particles. The drive unit 26 drives the adsorption cylinder 23 to rotate, and the centrifugal force generated by the rotation of the adsorption cylinder 23 causes the water to pass through the electromagnetic adsorption net 21 and the flow channel between the photocatalytic unit 31. The biomagnetic carbon powder coated with microplastic particles in the water is adsorbed and trapped by the electromagnetic adsorption net 21, and the remaining water enters the flow channel under the action of centrifugal force for further photocatalytic degradation of microplastics.

[0034] Furthermore, the drive unit 26 includes a drive motor, a drive gear, and a drive gear ring. The drive gear ring is sleeved on the outside of the adsorption cylinder 23, and the drive gear is sleeved on the outside of the output shaft of the drive motor. The drive gear meshes with the drive gear ring. The drive motor drives the adsorption cylinder 23 to rotate.

[0035] Furthermore, the adsorption cylinder 23 is provided with a central vortex section 27, which is used to transport the water flowing through the adsorption cylinder 23 to the electromagnetic adsorption net 21 in a vortex direction. The central vortex section 27 includes a vortex tower, and a spiral groove is provided on the outer surface of the vortex tower. The spiral groove causes the water to swirl, thereby making the water flow to the electromagnetic adsorption net 21 as evenly as possible, avoiding excessive or insufficient water flow in some areas of the electromagnetic adsorption net 21.

[0036] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0037] Example 3:

[0038] A tap water plastic cascade treatment device, improved based on Embodiment 1 or 2, such as... Figure 4 As shown, the photocatalytic degradation device 3 includes an inner cylinder 32 and an outer cylinder 33. The inner cylinder 32 is coaxially sleeved outside the adsorption cylinder 23. A flow hole is provided on the cylinder wall of the inner cylinder 32, and a solenoid valve is provided at the flow hole. A through hole corresponding to the flow hole is provided on the adsorption cylinder 23. The outer cylinder 33 is coaxially sleeved outside the inner cylinder 32. A plurality of photocatalytic units 31 are evenly distributed circumferentially between the inner cylinder 32 and the outer cylinder 33.

[0039] When the solenoid valve is opened, water is electromagnetically adsorbed by the electromagnetic adsorption net 21 and then enters the space between the inner cylinder 32 and the outer cylinder 33 through the flow hole. The water then flows through the channel between adjacent photocatalytic units 31 to photocatalytically degrade residual microplastic particles in the water. When the biomagnetic carbon powder adsorbed on the electromagnetic adsorption net 21 reaches its upper limit, the solenoid valve closes the flow hole, preventing water from entering the space between the inner cylinder 32 and the outer cylinder 33. At this point, the electromagnetic adsorption net 21 loses its magnetism and the adsorbed biomagnetic carbon powder falls off and enters the cleaning water collection device 4 for biomagnetic carbon powder recovery and water recirculation.

[0040] Furthermore, the photocatalytic unit 31 includes a photocatalytic plate and a light source. A photocatalyst is disposed on any surface of the photocatalytic plate that contacts the water flow, and the light source is disposed corresponding to the surface of the photocatalytic plate that contacts the water flow. The photocatalyst is WO3-TiO2@β-SiC.

[0041] The other parts of this embodiment are the same as those in Embodiment 1 or 2, so they will not be described again.

[0042] Example 4:

[0043] A tap water plastic cascade treatment device, improved based on any one of Examples 1-3, such as... Figure 2 As shown, the stepped filtration device 1 includes a filter cylinder 11, a screen section 12, and a membrane filtration section 13. The screen section 12 and the membrane filtration section 13 are arranged sequentially inside the filter cylinder 11 along the water flow direction. The screen section 12 includes several levels of screens with progressively smaller apertures.

[0044] The screen section 12 is used to filter and remove particulate impurities other than microplastics from the water. The membrane filtration section 13 includes a plurality of microfiltration membranes arranged sequentially along the water flow direction to filter and remove microplastic particles with a particle size greater than or equal to 0.1 mm from the water.

[0045] The other parts of this embodiment are the same as any one of embodiments 1-3, so they will not be described again.

[0046] Example 5:

[0047] A tap water plastic cascade treatment device, improved based on any one of Examples 1-4, such as... Figure 5 As shown, the cleaning water collection device 4 includes a collection tank 41 and an electromagnetic adsorption unit 42. The inlet of the collection tank 41 is connected to the outlet of the magnetic adsorption device 2 through a pipeline with a solenoid valve. The electromagnetic adsorption unit 42 is provided at the bottom of the collection tank 41.

[0048] A hanger is installed on the top of the collection tank 41, and an electromagnetic adsorption unit 42 extending into the collection tank 41 is installed at the bottom of the hanger. When the electromagnetic adsorption unit 42 is energized, it generates magnetism to adsorb the biomagnetic carbon powder in the water entering the collection tank 41. Then, the hanger is lifted to the outside of the collection tank 41 by an external lifting device, so that the biomagnetic carbon powder adsorbed on the electromagnetic adsorption unit 42 can be recovered.

[0049] Furthermore, a reflux pump 43 is installed inside the collection tank 41. The reflux pump 43 is used to return the water inside the collection tank 41 to the inlet of the magnetic adsorption device 2. After the biomagnetic carbon powder in the water is recovered, the treated water is returned to the inlet of the magnetic adsorption device 2 by the reflux pump 43 to participate in the microplastic particle treatment cycle again.

[0050] The other parts of this embodiment are the same as any one of embodiments 1-4, so they will not be described again.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A cascade treatment device for microplastics in tap water, characterized in that, The system includes a cascade filtration device (1), a magnetic adsorption device (2), a photocatalytic degradation device (3), and a cleaning water collection device (4). The magnetic adsorption device (2) includes at least one rotatable electromagnetic adsorption mesh (21). The inlet of the electromagnetic adsorption mesh (21) is connected to the outlet of the cascade filtration device (1), and the outlet of the electromagnetic adsorption mesh (21) is connected to the cleaning water collection device (4). The outlet of the cleaning water collection device (4) flows back to the inlet of the magnetic adsorption device (2). The photocatalytic degradation device (3) includes several groups of photocatalytic sections (31) evenly distributed around the outside of the electromagnetic adsorption mesh (21). Adjacent photocatalytic sections (31) form flow channels corresponding to the outside of the electromagnetic adsorption mesh (21). A photocatalyst is provided on the photocatalytic section (31). The magnetic adsorption device (2) includes sequentially connected... The dosing cartridge (22) is connected to the adsorption cartridge (23) and the magnetic carbon powder dosing device (24). The dosing cartridge (22) is connected to the magnetic carbon powder dosing device (24). The dosing cartridge (22) is equipped with a stirring part (25). The adsorption cartridge (23) is equipped with an electromagnetic adsorption mesh (21). The adsorption cartridge (23) is equipped with a driving part (26) that drives the adsorption cartridge (23) to rotate on one side of the outside. The photocatalytic degradation device (3) includes an inner cylinder (32) and an outer cylinder (33). The inner cylinder (32) is coaxially sleeved on the outside of the adsorption cartridge (23). The inner cylinder (32) is equipped with a flow hole on its wall and an electromagnetic valve is installed at the flow hole. The outer cylinder (33) is coaxially sleeved on the outside of the inner cylinder (32). A number of photocatalytic parts (31) are evenly distributed circumferentially between the inner cylinder (32) and the outer cylinder (33).

2. The tap water microplastic cascade treatment device according to claim 1, characterized in that, The adsorption cylinder (23) is provided with a central vortex section (27) inside, which is used to transport the water flowing through the adsorption cylinder (23) to the electromagnetic adsorption net (21) in the direction of vortex.

3. The tap water microplastic cascade treatment device according to claim 1, characterized in that, The photocatalytic unit (31) includes a photocatalytic plate and a light source. A photocatalyst is provided on any surface of the photocatalytic plate that is in contact with the water flow, and the light source is provided on the surface of the photocatalytic plate that is in contact with the water flow.

4. A cascade treatment device for microplastics in tap water according to claim 1 or 2, characterized in that, The stepped filtration device (1) includes a filter cylinder (11), a screen section (12), and a membrane filtration section (13). The screen section (12) and the membrane filtration section (13) are arranged sequentially inside the filter cylinder (11) along the water flow direction. The screen section (12) includes several levels of screens with progressively smaller apertures.

5. A cascade treatment device for microplastics in tap water according to claim 1 or 2, characterized in that, The cleaning water collection device (4) includes a collection box (41) and an electromagnetic adsorption part (42). The inlet of the collection box (41) is connected to the outlet of the magnetic adsorption device (2) through a pipeline with a solenoid valve. The bottom of the collection box (41) is provided with an electromagnetic adsorption part (42).

6. The tap water microplastic cascade treatment device according to claim 5, characterized in that, The collection box (41) is equipped with a reflux pump (43) inside, which is used to return the water inside the collection box (41) to the inlet of the magnetic adsorption device (2).

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