A water treatment device based on magnetic particle catalysis and ceramic filter membrane filtration

Abstract

The application belongs to the technical field of water treatment device, and particularly relates to a water treatment device based on magnetic particle catalysis and ceramic filter membrane filtration. The application comprises a filter tank, a SiC ceramic membrane is arranged in the filter tank in a through manner from top to bottom, a filter liquid bin is formed between the inner wall of the filter tank and the outer wall of the SiC ceramic membrane, a liquid inlet pipe is connected to the top of the filter tank, and a filter liquid discharge pipe is connected to the lower part of the filter liquid bin; a backwashing tank is communicated with the bottom of the filter tank, a concentrated liquid discharge pipe is connected to the backwashing tank, a precipitation device is connected to the concentrated liquid discharge pipe, a concentrated liquid inlet pipe is further connected to the top of the filter tank, and the precipitation device is connected to the concentrated liquid inlet pipe; a magnetic catalytic material and an oxidizing agent are added to the SiC ceramic membrane, and a plurality of magnetic field generating devices are arranged on the filter tank. The application provides a water treatment device based on magnetic particle catalysis and ceramic filter membrane filtration, and the removal efficiency of complex pollutants is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of water treatment devices, and specifically relates to a water treatment device based on magnetic particle catalysis and ceramic filter membrane filtration. Background Technology

[0002] Slightly polluted water bodies refer to water bodies with low pollutant concentrations that may still have negative impacts on the environment and human health. The pollution of these water bodies is complex, with diverse sources and compositions, requiring effective treatment methods to ensure water quality safety.

[0003] Slightly polluted water bodies are widespread, including natural water bodies such as rivers, lakes, and groundwater, as well as urban water supply systems. Although pollutant concentrations are low, they pose a potential threat to the ecological environment and human health due to cumulative effects and their potential toxicity. The main sources of pollution in slightly polluted water bodies include:

[0004] 1) Industrial wastewater: contains heavy metals, organic pollutants and other harmful chemicals.

[0005] 2) Agricultural runoff: pollutants from pesticides, fertilizers and livestock manure.

[0006] 3) Domestic sewage: residues from personal care products, pharmaceuticals, and chemicals used in daily life.

[0007] 4) Rainwater runoff: carries urban surface pollutants into water bodies.

[0008] Pollutant components:

[0009] The pollutants in slightly polluted water bodies are diverse, and common ones include:

[0010] 1) Organic pollutants: such as volatile organic compounds (VOCs) such as benzene, toluene, and chlorobenzene, as well as polycyclic aromatic hydrocarbons (PAHs).

[0011] 2) Inorganic pollutants: such as heavy metals (lead, mercury, cadmium, etc.).

[0012] 3) Pathogenic microorganisms: such as bacteria and viruses.

[0013] 4) Nutrients: such as nitrogen and phosphorus, which cause eutrophication of water bodies.

[0014] Conventional removal methods:

[0015] 1) Physical methods: precipitation, filtration, adsorption, etc.

[0016] 2) Chemical methods: oxidation-reduction, chemical precipitation, photocatalysis, etc.

[0017] 3) Biological methods: activated sludge process, biological filter, etc.

[0018] Shortcomings and areas for improvement:

[0019] 1) Limited treatment effect: The removal efficiency for complex pollutants is not high.

[0020] 2) High cost: Especially high-efficiency processing technologies have high costs.

[0021] 3) Secondary pollution: Some treatment processes may generate secondary pollution.

[0022] Although current methods for treating slightly polluted water have achieved some success in pollution control, they still suffer from problems such as high cost, secondary pollution, and low efficiency. Summary of the Invention

[0023] In order to solve the above-mentioned problems in the existing technology, the purpose of this invention is to provide a water treatment device based on magnetic particle catalysis and ceramic filter membrane filtration, which improves the removal efficiency of complex pollutants.

[0024] The technical solution adopted in this invention is as follows:

[0025] A water treatment device based on magnetic particle catalysis and ceramic membrane filtration includes a filter tank, in which a SiC ceramic membrane runs vertically through the filter tank. A filtrate chamber is formed between the inner wall of the filter tank and the outer wall of the SiC ceramic membrane. An inlet chamber is formed between the upper part of the filter tank and the top of the SiC ceramic membrane. An inlet pipe is connected to the top of the filter tank, and a filtrate outlet pipe is connected to the lower part of the filtrate chamber. A backwash tank is connected to the bottom of the filter tank, and a concentrate outlet pipe is connected to the backwash tank. The concentrate outlet pipe is connected to a sedimentation device. A concentrate inlet pipe is also connected to the top of the filter tank, and the sedimentation device is connected to the concentrate inlet pipe. Magnetic catalytic materials and oxidants are added to the SiC ceramic membrane, and several magnetic field generating devices are installed on the filter tank.

[0026] Slightly polluted water enters the inlet chamber through the inlet pipe, then flows into the SiC ceramic membrane, where it filters the water. The SiC ceramic membrane contains magnetic catalytic materials and oxidants, effectively decomposing various organic pollutants. With the assistance of a magnetic field generator, the magnetic catalytic materials are kept suspended in the water, increasing their contact area with pollutants and improving catalytic efficiency.

[0027] The remaining concentrate after filtration through the SiC ceramic membrane enters the backwash tank, and then is sent to the sedimentation unit for treatment through the concentrate discharge pipe. After treatment, it is sent back into the inlet chamber through the concentrate inlet pipe to avoid the SiC ceramic membrane from reducing the filtration flux due to excessive deposits of pollutants.

[0028] In a preferred embodiment of the present invention, the backwash tank is divided into a backwash chamber and a backwash liquid storage chamber by a partition. The backwash chamber is connected to the SiC ceramic membrane. The concentrate discharge pipe is connected to the backwash chamber. A backwash liquid injection device is installed on the backwash chamber. A backwash liquid suction pipe is connected between the backwash liquid storage chamber and the backwash chamber. A backwash gas-liquid inlet pipe is connected to the backwash liquid storage chamber. A backwash outlet pipe is connected to the inlet pipe.

[0029] After the flow of slightly polluted water is stopped, the backwash fluid in the storage tank is extracted through the backwash fluid suction pipe and sprayed into the SiC ceramic membrane. The backwash fluid injection device provides a high outlet water head and fully mixes the gas and liquid, improving the backwash fluid injection effect, thereby flushing away contaminants in the SiC ceramic membrane. The backwash fluid is discharged from the backwash outlet pipe after passing through the inlet pipe.

[0030] As a preferred embodiment of the present invention, the backwash liquid suction pipe is connected to a high-concentration oxidant storage chamber for diffusing the oxidant into the SiC ceramic membrane. The high-concentration oxidant storage chamber stores the oxidant, and when the SiC ceramic membrane filters slightly polluted water, the oxidant can be diffused into the SiC ceramic membrane through the backwash liquid suction pipe, ensuring that the oxidant concentration in the water within the SiC ceramic membrane remains stable.

[0031] As a preferred embodiment of the present invention, the backwash tank is further provided with a magnetic catalytic material storage chamber, and a magnetic catalytic material dosing device for diffusing magnetic catalytic material into the SiC ceramic membrane is connected to the magnetic catalytic material storage chamber. The outlet of the magnetic catalytic material dosing device extends into the backwash tank. When the SiC ceramic membrane filters slightly polluted water, the magnetic catalytic material dosing device diffuses the magnetic catalytic material in the magnetic catalytic material storage chamber into the SiC ceramic membrane, ensuring that the concentration of magnetic catalytic material in the water within the SiC ceramic membrane remains stable.

[0032] In a preferred embodiment of the present invention, a magnetic catalytic material recovery device is provided at the bottom of the filter tank. When the flux of the SiC ceramic membrane decreases to the point where backwashing is required, the magnetic field generating device is turned off, and the magnetic catalytic material in the SiC ceramic membrane descends due to gravity. The magnetic catalytic material recovery device is then activated to recover the magnetic catalytic material. After adsorption is complete, the backwash liquid injection device and the backwash gas-liquid inlet pipe are opened to reduce the magnetism of the magnetic catalytic material recovery device. The magnetic material dosing device then begins to add magnetic catalytic material to rinse the ceramic membrane. At this time, the magnetic catalytic material acts as cleaning particles for the SiC ceramic membrane, further cleaning the ceramic membrane.

[0033] To reduce operating costs, the magnetic catalytic material in the backwash liquid discharged through the backwash outlet pipe can be recovered, and the FeS2 catalyst can be recovered by means of magnetic separation and other methods for recycling.

[0034] As a preferred embodiment of the present invention, a SiC ceramic membrane positioning post is fixed in the middle of the filter tank, and the SiC ceramic membrane is sleeved on the SiC ceramic membrane positioning post.

[0035] As a preferred embodiment of the present invention, the filter tank is further provided with a number of supporting members, and the number of supporting members and a number of magnetic field generating devices are arranged alternately to form the side wall of the filter tank.

[0036] As a preferred embodiment of the present invention, an ultraviolet (UV) device is installed within the pores of the SiC ceramic membrane. UVA, UVB, UVC, etc., are selected based on the actual COD levels of the water. UV light can excite magnetic materials such as FeS2 to generate highly active oxidants (such as OH radicals), further oxidizing and degrading pollutants. The design of the UV reaction module allows UV light to be efficiently and uniformly irradiated into the water, improving the treatment effect.

[0037] As a preferred embodiment of the present invention, the filter tank is provided with an inlet sealing device, which separates the filter liquid chamber and the inlet liquid chamber.

[0038] As a preferred embodiment of the present invention, a negative pressure device is provided in both the filtrate tank and the filtrate discharge pipe to increase the filtration throughput.

[0039] The beneficial effects of this invention are as follows:

[0040] 1. The SiC ceramic membrane of this invention filters slightly polluted water. The SiC ceramic membrane contains magnetic catalytic materials and oxidants, which can effectively decompose various organic pollutants. With the assistance of a magnetic field generator, the magnetic catalytic materials can be kept suspended in the water, increasing their contact area with pollutants and improving catalytic efficiency.

[0041] 2. The remaining concentrate after filtration through the SiC ceramic membrane enters the backwash tank, and then is sent to the sedimentation unit for treatment through the concentrate discharge pipe. After treatment, it is sent back to the inlet chamber through the concentrate inlet pipe to avoid the SiC ceramic membrane from decreasing the filtration flux due to excessive deposits of contaminants.

[0042] 3. After the passage of slightly polluted water is stopped, the backwash liquid in the backwash liquid storage tank is extracted through the backwash liquid suction pipe and sprayed into the SiC ceramic membrane. The backwash liquid injection device provides a high outlet water head and fully mixes the gas and liquid, improving the backwash liquid injection effect, thereby flushing away the contaminants in the SiC ceramic membrane.

[0043] 4. When filtering slightly polluted water with SiC ceramic membrane, the oxidant can be diffused into the SiC ceramic membrane through the backwash suction pipe to ensure that the concentration of oxidant in the water inside the SiC ceramic membrane remains stable; the magnetic catalytic material dosing device diffuses the magnetic catalytic material in the magnetic catalytic material storage chamber into the SiC ceramic membrane to ensure that the concentration of magnetic catalytic material in the water inside the SiC ceramic membrane remains stable.

[0044] 5. The magnetic catalytic material recovery device can recover magnetic catalytic materials. During the rinsing of the ceramic membrane, the magnetic catalytic material acts as cleaning particles for the SiC ceramic membrane, further cleaning it. Furthermore, to reduce operating costs, the magnetic catalytic material in the backwash liquid discharged through the backwash outlet pipe can be recovered, and the FeS2 catalyst can be recovered through magnetic separation and other methods for recycling. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of the present invention;

[0046] Figure 2 This is a cross-sectional view of the present invention;

[0047] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0048] Figure 4 yes Figure 2 Enlarged view of a section at point B in the middle;

[0049] Figure 5 It is an assembly diagram of several water treatment devices.

[0050] In the diagram: 1-Filter tank; 2-SiC ceramic membrane; 3-Backwash tank; 4-Inlet pipe; 5-Filtrate discharge pipe; 6-Concentrate discharge pipe; 7-Concentrate inlet pipe; 11-Filtrate tank; 12-Inlet tank; 13-Magnetic field generator; 14-Backwash outlet pipe; 15-Magnetic catalytic material recovery device; 16-Supporting component; 17-Inlet sealing device; 21-SiC ceramic membrane positioning pile; 22-Ultraviolet device; 31-Backwash tank; 32-Backwash liquid storage tank; 33-Backwash liquid spraying device; 34-Backwash liquid suction pipe; 35-Backwash gas-liquid inlet pipe; 36-High-concentration oxidant storage tank; 37-Magnetic catalytic material storage tank; 38-Magnetic catalytic material dosing device. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the invention can be combined with each other.

[0053] like Figure 5 As shown, this device is a prefabricated unit, with a single pipe processing capacity of 10–50 m³. 3 / day, the number of processing devices can be adjusted according to the actual situation during use.

[0054] like Figures 1-4 As shown, the water treatment device based on magnetic particle catalysis and ceramic membrane filtration in this embodiment includes a filter tank 1, a SiC ceramic membrane 2 running vertically through the filter tank 1, a filtrate chamber 11 formed between the inner wall of the filter tank 1 and the outer wall of the SiC ceramic membrane 2, an inlet chamber 12 formed between the upper part of the filter tank 1 and the top of the SiC ceramic membrane 2, an inlet pipe 4 connected to the top of the filter tank 1, and a filtrate outlet pipe 5 connected to the lower part of the filtrate chamber 11; a backwash tank 3 connected to the bottom of the filter tank 1, a concentrate outlet pipe 6 connected to the backwash tank 3, a sedimentation device connected to the concentrate outlet pipe 6, and a concentrate inlet pipe 7 connected to the top of the filter tank 1, with the sedimentation device connected to the concentrate inlet pipe 7; magnetic catalytic materials and oxidants are added to the SiC ceramic membrane 2, and several magnetic field generating devices 13 (generating an upward magnetic field) are provided on the filter tank 1.

[0055] The filter tank 1 has a SiC ceramic membrane positioning post 21 fixed in the middle, and the SiC ceramic membrane 2 is fitted onto the SiC ceramic membrane positioning post 21. The filter tank 1 also has several supporting members 16, which, along with several magnetic field generating devices 13, are arranged alternately to form the sidewalls of the filter tank 1. The filter tank 1 is equipped with an inlet sealing device 17, which separates the filter liquid chamber 11 from the inlet chamber 12. Negative pressure devices are installed in both the filter liquid chamber 11 and the filter liquid discharge pipe 5 to increase the filtration throughput.

[0056] Slightly polluted water enters the inlet chamber 12 through the inlet pipe 4, and then enters the SiC ceramic membrane 2, which filters the slightly polluted water. The SiC ceramic membrane 2 contains magnetic catalytic materials and oxidants, which can effectively decompose various organic pollutants. With the assistance of a magnetic field generator 13, the magnetic catalytic materials can be kept suspended in the water, increasing their contact area with pollutants and improving catalytic efficiency.

[0057] The remaining concentrate after filtration through the SiC ceramic membrane 2 enters the backwash tank 3, and then is sent to the sedimentation device for treatment through the concentrate discharge pipe 6. After treatment, it is sent back into the inlet chamber 12 through the concentrate inlet pipe 7 to avoid the SiC ceramic membrane 2 from having a decrease in filtration flux due to excessive deposits of pollutants.

[0058] Furthermore, the backwash tank 3 is divided into a backwash chamber 31 and a backwash liquid storage chamber 32 by a partition. The backwash chamber 31 is connected to the SiC ceramic membrane 2. The concentrate discharge pipe 6 is connected to the backwash chamber 31. A backwash liquid injection device 33 is installed on the backwash chamber 31. A backwash liquid suction pipe 34 is connected between the backwash liquid storage chamber 32 and the backwash chamber 31. A backwash gas-liquid inlet pipe 35 is connected to the backwash liquid storage chamber 32. A backwash outlet pipe 14 is connected to the inlet pipe 4.

[0059] After the passage of slightly polluted water is stopped, the backwash liquid in the backwash liquid storage tank 32 is extracted through the backwash liquid suction pipe 34 and sprayed into the SiC ceramic membrane 2. The backwash liquid injection device 33 provides a high outlet water head and fully mixes the gas and liquid, improving the backwash liquid injection effect, so that the pollutants in the SiC ceramic membrane 2 can be flushed away. The backwash liquid is discharged from the backwash liquid outlet pipe 14 after passing through the inlet pipe 4.

[0060] During backwashing, the inlet pipe 4 is closed and the backwash outlet pipe 14 is opened. The backwash liquid is stored, and the materials contained therein are recovered. To reduce operating costs, the magnetic catalytic material in the backwash liquid discharged through the backwash outlet pipe 14 is recovered. The FeS2 catalyst is recovered through magnetic separation and other means for recycling.

[0061] Furthermore, the backwash liquid suction pipe 34 is connected to a high-concentration oxidant storage chamber 36 for diffusing the oxidant into the SiC ceramic membrane 2. The high-concentration oxidant storage chamber 36 stores oxidant, and when the SiC ceramic membrane 2 filters slightly polluted water, the oxidant can be diffused into the SiC ceramic membrane 2 through the backwash liquid suction pipe, ensuring that the oxidant concentration in the water inside the SiC ceramic membrane 2 remains stable.

[0062] The backwash tank 3 is also equipped with a magnetic catalytic material storage chamber 37. A magnetic catalytic material dosing device 38 is connected to the magnetic catalytic material storage chamber 37 for diffusing the magnetic catalytic material into the SiC ceramic membrane 2. The outlet of the magnetic catalytic material dosing device 38 extends into the backwash tank 31. When the SiC ceramic membrane 2 filters slightly polluted water, the magnetic catalytic material dosing device 38 diffuses the magnetic catalytic material from the magnetic catalytic material storage chamber 37 into the SiC ceramic membrane 2, ensuring that the concentration of the magnetic catalytic material in the water within the SiC ceramic membrane 2 remains stable.

[0063] It should be noted that the magnetic catalytic materials are FeS2, ZVI, etc. The top of the magnetic material dosing device has dosing holes to control the amount added at one time. The high-concentration oxidant storage tank 36 is made of oxidation-resistant material and has a dedicated diffuser on its surface. The oxidant can be hydrogen peroxide, persulfate, peracetic acid, periodate, etc. The oxidant concentration is determined based on the COD concentration of the water at the site, generally between 2:1 and 10:1.

[0064] Furthermore, a magnetic catalytic material recovery device 15 is installed at the bottom of the filter tank 1. When the flux of the SiC ceramic membrane 2 drops to the point where backwashing is required, the magnetic field generating device 13 is turned off, and the magnetic catalytic material in the SiC ceramic membrane 2 descends due to gravity. The magnetic catalytic material recovery device 15 is then activated to recover the magnetic catalytic material. After adsorption is complete, the backwash liquid injection device 33 and the backwash gas-liquid inlet pipe 35 are opened to reduce the magnetism of the magnetic catalytic material recovery device 15. The magnetic material dosing device then begins to add magnetic catalytic material to rinse the ceramic membrane. At this time, the magnetic catalytic material will act as cleaning particles for the SiC ceramic membrane 2, further cleaning the ceramic membrane.

[0065] Furthermore, an ultraviolet (UV) device 22 is installed within the pores of the SiC ceramic membrane 2. UVA, UVB, UVC, etc., are selected based on the actual COD levels of the water. UV light can excite magnetic materials such as FeS2 to generate highly active oxidants (such as OH radicals), further oxidizing and degrading pollutants. The design of the UV reaction module allows UV light to be efficiently and uniformly irradiated into the water, improving the treatment effect.

[0066] To make magnetic catalytic materials (diameter 1μm, density 5000kg / m³) 3 The required magnetic field strength for suspension in a liquid with a flow velocity of 0.002 m / s is approximately 29.82 T. In practical applications, the magnetic field strength used should be determined and adjusted based on the actual water residence time and flow velocity.

[0067] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. A water treatment device based on magnetic particle catalysis and ceramic membrane filtration, characterized in that: The system includes a filter tank (1), inside which is a vertically connected SiC ceramic membrane (2). A filtration liquid chamber (11) is formed between the inner wall of the filter tank (1) and the outer wall of the SiC ceramic membrane (2). An inlet chamber (12) is formed between the upper part of the filter tank (1) and the top of the SiC ceramic membrane (2). An inlet pipe (4) is connected to the top of the filter tank (1), and a filtration liquid discharge pipe (5) is connected to the lower part of the filtration liquid chamber (11). Slightly polluted water enters the inlet chamber (12) through the inlet pipe (4) and then enters the SiC ceramic membrane (2), where the SiC ceramic membrane (2) filters the slightly polluted water. The bottom is connected to a backwash tank (3), and the backwash tank (3) is connected to a concentrate discharge pipe (6). The concentrate discharge pipe (6) is connected to a sedimentation device. The top of the filter tank (1) is also connected to a concentrate inlet pipe (7). The sedimentation device is connected to the concentrate inlet pipe (7). The concentrate remaining after filtration by the SiC ceramic membrane (2) enters the backwash tank (3), and is then sent to the sedimentation device through the concentrate discharge pipe (6) for treatment before being sent back into the inlet chamber (12) through the concentrate inlet pipe (7). Magnetic catalytic materials and oxidants are added to the SiC ceramic membrane (2), and several magnetic field generating devices (13) are installed on the filter tank (1). The backwash tank (3) is divided into a backwash chamber (31) and a backwash liquid storage chamber (32) by a partition. The backwash chamber (31) is connected to the SiC ceramic membrane (2). The concentrate discharge pipe (6) is connected to the backwash chamber (31). A backwash liquid injection device (33) is installed on the backwash chamber (31). A backwash liquid suction pipe (34) is connected between the backwash liquid storage chamber (32) and the backwash chamber (31). A backwash gas-liquid inlet pipe (35) is connected to the backwash liquid storage chamber (32). A backwash outlet pipe (14) is connected to the inlet pipe (4). The backwash liquid suction pipe (34) is connected to a high-concentration oxidant storage chamber (36) for diffusing the oxidant into the SiC ceramic membrane (2). The backwash tank (3) is also equipped with a magnetic catalytic material storage chamber (37). A magnetic catalytic material addition device (38) for diffusing magnetic catalytic material to SiC ceramic membrane (2) is connected to the magnetic catalytic material storage chamber (37). The outlet of the magnetic catalytic material addition device (38) extends into the backwash tank (31). The bottom of the filter tank (1) is equipped with a magnetic catalytic material recovery device (15).

2. The water treatment device based on magnetic particle catalysis and ceramic membrane filtration according to claim 1, characterized in that: The filter tank (1) is fixed with a SiC ceramic membrane positioning post (21) in the middle, and the SiC ceramic membrane (2) is fitted on the SiC ceramic membrane positioning post (21).

3. The water treatment device based on magnetic particle catalysis and ceramic membrane filtration according to claim 1, characterized in that: The filter tank (1) is also provided with several support components (16), and several support components (16) and several magnetic field generating devices (13) are arranged alternately to form the side wall of the filter tank (1).

4. The water treatment device based on magnetic particle catalysis and ceramic membrane filtration according to claim 1, characterized in that: An ultraviolet device (22) is provided inside the pores of the SiC ceramic film (2).

5. A water treatment device based on magnetic particle catalysis and ceramic membrane filtration according to claim 1, characterized in that: The filter tank (1) is provided with an inlet end sealing device (17), which separates the filter liquid chamber (11) and the inlet chamber (12).

6. A water treatment device based on magnetic particle catalysis and ceramic membrane filtration according to any one of claims 1 to 5, characterized in that: Negative pressure devices are installed in both the filtrate tank (11) and the filtrate discharge pipe (5).

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