Tap water micro-plastic stepped treatment device

Abstract

The invention discloses a tap water micro-plastic stepped treatment device which comprises a stepped filtering device, a magnetic adsorption device, a photocatalytic degradation device and a cleaning water collecting device, the magnetic adsorption device comprises at least one electromagnetic adsorption net capable of rotating, and the inlet end of the electromagnetic adsorption net is connected with the outlet end of the stepped filtering device; the outlet end of the electromagnetic adsorption net is connected with the cleaning water collecting device, and the outlet end of the cleaning water collecting device flows back to the inlet end of the magnetic adsorption device; the photocatalytic degradation device comprises a plurality of groups of photocatalytic parts which are uniformly distributed outside the electromagnetic adsorption net along the circumferential direction, a flow channel which is correspondingly connected with the outer side of the electromagnetic adsorption net is formed between every two adjacent photocatalytic parts, and a photocatalyst is arranged on each photocatalytic part; according to the invention, gradient treatment of filtration, magnetic adsorption and photocatalytic degradation can be carried out on micro-plastic particles in tap water, and the content of the micro-plastic particles in a water body is effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of water microplastic treatment and relates to a tap water microplastic cascade treatment device. Background Art

[0002] With the popularization of plastic products, the content of microplastic particles in tap water has increased significantly. Once the content of microplastic particles in tap water increases to a certain level, it will threaten the ecological environment and human health.

[0003] In the prior art, the methods for removing microplastics from tap water mainly involve chemical removal and physical removal. The chemical removal method is to remove microplastic particles in tap water by adding specific agents to the tap water to react with the microplastic particles, but the chemical removal method introduces new chemical substances into the tap water, and the introduced chemical substances need to be further processed after the microplastics are removed, which increases the cycle and cost of removing microplastics from tap water. The physical removal method is to filter and adsorb the microplastic particles in the tap water by setting a filtering device and an adsorption device. However, due to the small particle size of the microplastic particles in the tap water, and the microplastic particles are mixed with the other solid impurities in the tap water, the removal efficiency of the microplastic particles in the tap water by the existing filtering device or adsorption device is not ideal.

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

[0005] The purpose of the present invention is to provide a tap water microplastic cascade treatment device, which can filter, magnetically adsorb, and photocatalytically degrade microplastic particles in tap water, thereby effectively reducing the content of microplastic particles in the water.

[0006] The present invention is achieved through the following technical solutions: A tap water microplastic cascade treatment device comprises a cascade filtration device, a magnetic adsorption device, a photocatalytic degradation device, and a cleaning water collecting device, wherein the magnetic adsorption device comprises at least one rotatable electromagnetic adsorption net, the inlet end of the electromagnetic adsorption net is connected to the outlet end of the cascade filtration device, the outlet end of the electromagnetic adsorption net is connected to the cleaning water collecting device, and the outlet end of the cleaning water collecting device flows back to the inlet end of the magnetic adsorption device; the photocatalytic degradation device comprises a plurality of groups of photocatalytic parts uniformly distributed along the circumferential direction outside the electromagnetic adsorption net, adjacent photocatalytic parts form flow channels correspondingly connected to the outer side of the electromagnetic adsorption net, and the photocatalyst is arranged on the photocatalytic part.

[0007] First, the microplastic particles in the water body are filtered through a cascade filtration device, and the water body enters a magnetic adsorption device, through which biological magnetic carbon powder is added to the water body, and the biological magnetic carbon powder fully coats the surface of the microplastic particles in the tap water, and then the electromagnetic adsorption net in the magnetic adsorption device adsorbs the biological magnetic carbon powder wrapped with microplastic particles, so as to perform secondary treatment on the microplastics in the water body. The water body after magnetic adsorption further enters a photocatalytic degradation device, and the photocatalytic part in the photocatalytic degradation device photocatalytically degrades the residual microplastic particles in the water body, thereby achieving tertiary treatment of microplastics in the water body.

[0008] In order to better realize the present invention, further, the magnetic adsorption device includes a dosing cylinder, an adsorption cylinder, and a magnetic carbon powder doser connected in sequence, the dosing cylinder is connected to the magnetic carbon powder doser, and a stirring part is arranged inside the dosing cylinder; an electromagnetic adsorption net is arranged inside the adsorption cylinder, and a driving part for driving the adsorption cylinder to rotate is arranged on one side of the outside of the adsorption cylinder.

[0009] In order to better realize the present invention, further, a central cyclone portion is provided inside the adsorption cylinder, and the central cyclone portion is used to transport the water flowing through the adsorption cylinder to the electromagnetic adsorption net in the direction of cyclone.

[0010] In order to better realize the present invention, further, the photocatalytic degradation device includes an inner cylinder and an outer cylinder, the inner cylinder is coaxially sleeved on the outside of the adsorption cylinder, the cylinder wall of the inner cylinder is provided with a flow hole, and the flow hole is provided with a solenoid valve; the outer cylinder is coaxially sleeved on the outside of the inner cylinder, and a plurality of photocatalytic parts are evenly distributed along the circumferential direction between the inner cylinder and the outer cylinder.

[0011] In order to better realize the present invention, further, the photocatalytic part includes a photocatalytic plate and a light source, a photocatalyst is arranged on any surface of the photocatalytic plate in contact with the water flow, and the light source is arranged corresponding to the surface of the photocatalytic plate in contact with the water flow.

[0012] In order to better realize the present invention, further, the step filtration device includes a filter cartridge, a screen portion, and a membrane filtration portion. The interior of the filter cartridge is provided with a screen portion and a membrane filtration portion in sequence along the water flow direction. The screen portion includes several levels of screens with successively decreasing apertures.

[0013] In order to better realize the present invention, further, the cleaning water collecting device includes a collecting box and an electromagnetic adsorption part. The inlet end of the collecting box is connected to the outlet end of the magnetic adsorption device through a pipeline with a solenoid valve, and an electromagnetic adsorption part is provided at the bottom of the collecting box.

[0014] In order to better implement the present invention, further, a reflux pump is provided inside the collection box, and the reflux pump is used to return the water flow inside the collection box to the inlet end of the magnetic adsorption device.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention provides a stepped filtering device to perform a primary filtering treatment on microplastic particles in a water body, so that microplastic particles with a particle size greater than or equal to 0.1 mm in the water body are filtered and removed; then, biomagnetic carbon powder is added to the water body to coat the microplastic particles, and the biomagnetic carbon powder is adsorbed by an electromagnetic adsorption net in a magnetic adsorption device, so as to further remove microplastic particles with a particle size of 50 μm-0.1 mm in the water body; then, the water body is passed through a photocatalytic degradation device, and the residual microplastic particles in the water body are catalytically degraded by photocatalysis, thereby effectively reducing the content of microplastic particles in the water body; at the same time, the used biomagnetic carbon powder is adsorbed and collected by a cleaning water collection device, so as to realize the recycling of the biomagnetic carbon powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a tap water plastic cascade treatment device; Figure 2 It is a structural schematic diagram of a cascade filtration device; Figure 3 It is a structural schematic diagram of a magnetic adsorption device; Figure 4 It is a structural schematic diagram of a photocatalytic degradation device; Figure 5 This is a schematic diagram of the structure of the cleaning water collection device.

[0017] Among them: 1-step filtration device; 2-magnetic adsorption device; 3-photocatalytic degradation device; 4-cleaning water collection device; 11-filter cartridge; 12-screen part; 13-membrane filtration part; 21-electromagnetic adsorption net; 22-dosing cartridge; 23-adsorption cartridge; 24-dosing device; 25-stirring part; 26-driving part; 27-central cyclone part; 31-photocatalytic part; 32-inner cylinder; 33-outer cylinder; 41-collection box; 42-electromagnetic adsorption part. DETAILED DESCRIPTION

[0018] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the present invention explicitly states otherwise, singular forms are also intended to include plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0021] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0022] Embodiment 1: A tap water plastic cascade treatment device of this embodiment, such as Figure 1 As shown, it includes a step filtering device 1, a magnetic adsorption device 2, a photocatalytic degradation device 3, and a cleaning water collecting device 4, wherein the magnetic adsorption device 2 includes at least one rotatable electromagnetic adsorption net 21, the inlet end of the electromagnetic adsorption net 21 is connected to the outlet end of the step filtering device 1, the outlet end of the electromagnetic adsorption net 21 is connected to the cleaning water collecting device 4, and the outlet end of the cleaning water collecting device 4 flows back to the inlet end of the magnetic adsorption device 2; the photocatalytic degradation device 3 includes a plurality of groups of photocatalytic parts 31 uniformly distributed along the circumferential direction on the outside of the electromagnetic adsorption net 21, and adjacent photocatalytic parts 31 form flow channels correspondingly connected to the outer side of the electromagnetic adsorption net 21, and the photocatalyst is arranged on the photocatalytic part 31.

[0023] The water body first passes through the step filter device 1, and the step filter device 1 performs step filtration on the large particle impurities and microplastic particles in the water body, so as to filter and remove the microplastic particles with a particle size greater than or equal to 0.1 mm in the water body. The water body enters the magnetic adsorption device 2, and the biomagnetic carbon powder is added to the water body through the dosing end of the magnetic adsorption device 2. The biomagnetic carbon powder coats the microplastic particles in the water body, and then the electromagnetic adsorption net 21 in the magnetic adsorption device 2 generates magnetism to adsorb the microplastic particles coated with the biomagnetic carbon powder, so as to adsorb and remove the microplastic particles with a particle size of 50μm-0.1mm in the water body. Then part of the water body passes through the flow channel between adjacent photocatalytic parts 31, and the photocatalytic part 31 photocatalytically degrades the residual microplastic particles in the water body. When the biological magnetic carbon powder adsorbed on the electromagnetic adsorption net 21 reaches the calibrated adsorption amount, the electromagnetic adsorption net 21 is powered off and the flow channel between the photocatalytic part 31 is closed. At this time, the electromagnetic adsorption net 21 loses its magnetism, and the biological magnetic carbon powder adsorbed on the electromagnetic adsorption net 21 falls off and flows to the cleaning water collecting device 4 along with the water. The biological magnetic carbon powder is adsorbed and recovered by the cleaning water collecting device 4. At the same time, the water flows back to the inlet of the magnetic adsorption device 2 through the outlet of the cleaning water collecting device 4 to re-participate in the magnetic adsorption of microplastics.

[0024] Embodiment 2: A tap water plastic cascade treatment device is improved on the basis of 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 doser 24 which are connected in sequence. The dosing cylinder 22 is connected to the magnetic carbon powder doser 24, and a stirring portion 25 is arranged inside the dosing cylinder 22; an electromagnetic adsorption net 21 is arranged inside the adsorption cylinder 23, and a driving portion 26 for driving the adsorption cylinder 23 to rotate is arranged on one side of the outside of the adsorption cylinder 23, and a through hole which is connected to the flow channel between adjacent photocatalytic portions 31 is arranged on the adsorption cylinder 23.

[0025] The biomagnetic carbon powder is added to the inside of the dosing cylinder 22 through the dosing device 24, and the water mixed with the biomagnetic carbon powder is stirred through the stirring part 25, so that the biomagnetic carbon powder is fully mixed with the microplastic particles in the water and the microplastic particles are coated, thereby ensuring the subsequent adsorption effect on the microplastic particles. The driving part 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 part 31. The biomagnetic carbon powder coated with microplastic particles in the water is adsorbed and intercepted by the electromagnetic adsorption net 21, and the remaining water enters the flow channel under the action of centrifugal force for further subsequent microplastic photocatalytic degradation.

[0026] Furthermore, the driving unit 26 includes a driving motor, a driving gear, and a driving ring gear, wherein the driving ring gear is sleeved on the outside of the adsorption cylinder 23, and the driving gear is sleeved on the outside of the output shaft of the driving motor, and the driving gear is meshed and connected with the driving ring gear. The adsorption cylinder 23 is driven to rotate by the driving motor.

[0027] Furthermore, a central swirl portion 27 is provided inside the adsorption cylinder 23, and the central swirl portion 27 is used to transport the water flowing through the adsorption cylinder 23 to the electromagnetic adsorption net 21 in the direction of swirl. The central swirl portion 27 includes a swirl tower, and a spiral groove is provided on the outer surface of the swirl tower. The water body is swirled by the action of the spiral groove, and then the water body is made to flow to the electromagnetic adsorption net 21 as evenly as possible, so as to avoid excessive water flow in some areas of the electromagnetic adsorption net 21 or too small water flow in some areas of the electromagnetic adsorption net 21.

[0028] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0029] Embodiment 3: A tap water plastic cascade treatment device is improved on the basis of 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 on the outside of the adsorption cylinder 23. A flow hole is provided on the cylinder wall of the inner cylinder 32. A solenoid valve is provided at the flow hole. The adsorption cylinder 23 is provided with a through hole corresponding to the flow hole; the outer cylinder 33 is coaxially sleeved on the outside of the inner cylinder 32, and a plurality of photocatalytic parts 31 are evenly distributed along the circumferential direction between the inner cylinder 32 and the outer cylinder 33.

[0030] When the solenoid valve is opened, the water passes through the electromagnetic adsorption net 21 for electromagnetic adsorption, and then enters between the inner cylinder 32 and the outer cylinder 33 through the flow hole. The water passes through the flow channel between the adjacent photocatalytic parts 31 to photocatalytically degrade the residual microplastic particles in the water. When the biomagnetic carbon powder adsorbed on the electromagnetic adsorption net 21 reaches the upper limit, the solenoid valve closes the flow hole, and the water cannot enter between the inner cylinder 32 and the outer cylinder 33. At this time, the electromagnetic adsorption net 21 is powered off and loses its magnetism, and the biomagnetic carbon powder adsorbed thereon falls off and enters the cleaning water collection device 4 for biomagnetic carbon powder recovery and water reflux.

[0031] Furthermore, the photocatalytic part 31 includes a photocatalytic plate and a light source, and a photocatalyst is arranged on any surface of the photocatalytic plate in contact with the water flow, and the light source is arranged corresponding to the surface of the photocatalytic plate in contact with the water flow. The photocatalyst is WO3-TiO2@β-SiC.

[0032] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0033] Embodiment 4: A tap water plastic cascade treatment device is improved on the basis of any one of embodiments 1-3, such as Figure 2 As shown, the step filtration device 1 includes a filter cartridge 11, a screen portion 12, and a membrane filtration portion 13. The filter cartridge 11 has the screen portion 12 and the membrane filtration portion 13 sequentially arranged inside along the water flow direction. The screen portion 12 includes several levels of screens with successively decreasing apertures.

[0034] The screen part 12 is used to filter out particulate impurities other than microplastics in the water body, and the membrane filtration part 13 includes a plurality of microfiltration membranes arranged in sequence along the water flow direction to filter out microplastic particles with a particle size greater than or equal to 0.1 mm in the water body.

[0035] The other parts of this embodiment are the same as any one of Embodiments 1-3, so they are not described again.

[0036] Embodiment 5: A tap water plastic cascade treatment device is improved on the basis of any one of embodiments 1-4, such as Figure 5 As shown, the cleaning water collecting device 4 includes a collecting box 41 and an electromagnetic adsorption part 42 . The inlet end of the collecting box 41 is connected to the outlet end of the magnetic adsorption device 2 through a pipeline with an electromagnetic valve. The bottom of the collecting box 41 is provided with an electromagnetic adsorption part 42 .

[0037] A hanger is provided on the top of the collection box 41, and an electromagnetic adsorption part 42 extending to the inside of the collection box 41 is provided at the bottom of the hanger. The electromagnetic adsorption part 42 generates magnetism after being energized to adsorb the biological magnetic carbon powder in the water entering the collection box 41. Then, the hanger is lifted to the outside of the collection box 41 by an external lifting device, and the biological magnetic carbon powder adsorbed on the electromagnetic adsorption part 42 can be recovered.

[0038] Furthermore, a reflux pump 43 is provided inside the collection box 41, and the reflux pump 43 is used to return the water flow inside the collection box 41 to the inlet end of the magnetic adsorption device 2. After the biological magnetic carbon powder in the water body is recovered, the treated water body is returned to the inlet end of the magnetic adsorption device 2 through the reflux pump 43 to participate in the microplastic particle treatment cycle again.

[0039] The other parts of this embodiment are the same as any one of Embodiments 1-4, so they are not described again.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A tap water microplastic cascade treatment device, characterized in that: The invention comprises a step filtering device (1), a magnetic adsorption device (2), a photocatalytic degradation device (3), and a washing water collecting device (4); the magnetic adsorption device (2) comprises at least one rotatable electromagnetic adsorption net (21); the inlet end of the electromagnetic adsorption net (21) is connected to the outlet end of the step filtering device (1); the outlet end of the electromagnetic adsorption net (21) is connected to the washing water collecting device (4); the outlet end of the washing water collecting device (4) flows back to the inlet end of the magnetic adsorption device (2); the photocatalytic degradation device (3) comprises a plurality of groups of photocatalytic parts (31) uniformly arranged outside the electromagnetic adsorption net (21) along the circumferential direction; adjacent photocatalytic parts (31) form flow channels correspondingly connected to the outer side of the electromagnetic adsorption net (21); and the photocatalytic parts (31) are provided with photocatalysts.

2. A tap water microplastic cascade treatment device according to claim 1, characterized in that: The magnetic adsorption device (2) comprises a dosing cylinder (22), an adsorption cylinder (23), and a magnetic carbon powder doser (24) which are connected in sequence. The dosing cylinder (22) is connected to the magnetic carbon powder doser (24), and a stirring portion (25) is provided inside the dosing cylinder (22); an electromagnetic adsorption net (21) is provided inside the adsorption cylinder (23), and a driving portion (26) for driving the adsorption cylinder (23) to rotate is provided on one side of the outside of the adsorption cylinder (23).

3. A tap water microplastic cascade treatment device according to claim 2, characterized in that: A central cyclone portion (27) is provided inside the adsorption cylinder (23), and the central cyclone portion (27) is used to transport the water flowing through the adsorption cylinder (23) to the electromagnetic adsorption net (21) in a cyclone direction.

4. A tap water microplastic cascade treatment device according to claim 2 or 3, characterized in that: The photocatalytic degradation device (3) comprises an inner cylinder (32) and an outer cylinder (33); the inner cylinder (32) is coaxially sleeved on the outside of an 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; the outer cylinder (33) is coaxially sleeved on the outside of the inner cylinder (32); and a plurality of photocatalytic parts (31) are evenly distributed along the circumferential direction between the inner cylinder (32) and the outer cylinder (33).

5. A tap water microplastic cascade treatment device according to claim 4, characterized in that: The photocatalytic part (31) comprises a photocatalytic plate and a light source, any surface of the photocatalytic plate in contact with the water flow is provided with a photocatalyst, and the light source is provided corresponding to the surface of the photocatalytic plate in contact with the water flow.

6. A tap water microplastic cascade treatment device according to any one of claims 1 to 3, characterized in that: The step filtration device (1) comprises a filter cartridge (11), a screen portion (12), and a membrane filtration portion (13); the screen portion (12) and the membrane filtration portion (13) are arranged in sequence inside the filter cartridge (11) along the water flow direction; the screen portion (12) comprises a plurality of screens with successively decreasing apertures.

7. A tap water microplastic cascade treatment device according to any one of claims 1 to 3, characterized in that: The cleaning water collecting device (4) comprises a collecting box (41) and an electromagnetic adsorption portion (42); the inlet end of the collecting box (41) is connected to the outlet end of the magnetic adsorption device (2) via a pipeline with an electromagnetic valve; and the bottom of the collecting box (41) is provided with the electromagnetic adsorption portion (42).

8. A tap water microplastic cascade treatment device according to claim 7, characterized in that: A reflux pump (43) is provided inside the collection box (41), and the reflux pump (43) is used to return the water flow inside the collection box (41) to the inlet end of the magnetic adsorption device (2).

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