Particulate photocatalytic water treatment device

Abstract

The application is a granular photocatalytic water treatment device, which comprises a water tank with an open upper end, the water tank is provided with a first side plate and a second side plate arranged oppositely; the water tank is provided with a water guide pipe arranged obliquely, the lower end of the water guide pipe is connected with the outlet of a water inlet pipe, and the upper end of the water guide pipe is directed to the second side plate; a throat pipe is arranged in the middle part of the water guide pipe, the diameter of the throat pipe increases from the middle to both ends; a flow guide plate is arranged obliquely below the water guide pipe; the oblique angle of the water guide pipe is configured so that the wastewater sprayed from the water guide pipe falls on the upper end position of the flow guide plate; a bottom plate is arranged obliquely below the flow guide plate; the low end position of the bottom plate is provided with a granular or powdery photocatalyst; a suction pipe is connected with the smallest diameter position of the throat pipe at one end and is opposite to and close to the low end position of the bottom plate at the other end; a filter cloth is blocked at the inlet position of the water outlet pipe to intercept the photocatalyst in the water tank. The photocatalyst can be reused, the cost can be reduced, and the utilization rate of the photocatalyst can be improved.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, specifically a particulate photocatalytic water treatment device. Background Technology

[0002] Photocatalysis is an effective method for wastewater purification. In photocatalytic reactions, many factors, such as the reactor's materials, structure, shape, and the geometric position of the light source, significantly influence the reaction rate. In particular, catalyst properties, such as particle size, type, and support, have the greatest impact on reactor operation.

[0003] Catalysts in photocatalytic reactors generally exist in two forms: suspended and stationary. In suspended photocatalysis, the catalyst is suspended in an aqueous solution as particulate matter, offering a large contact area with pollutants. However, the catalyst is prone to aggregation and difficult to recover, making it unsuitable for large-scale continuous operation and limiting it to intermittent operation, resulting in high processing costs. In stationary photocatalysis, the catalyst exists in a fixed state and must be supported on a carrier such as glass spheres, silica gel, sand, activated carbon, or zeolite. While this avoids catalyst separation and facilitates recovery, it significantly reduces the effective contact area between the catalyst and pollutants, decreases activity, and greatly increases the cost of catalyst production.

[0004] Therefore, making the photocatalyst into granular or powder form can solve the above-mentioned technical problems. However, if the particle size of the photocatalyst is too small, it is difficult to achieve uniform mixing and repeated recycling. Summary of the Invention

[0005] To address the technical problems in the background art, the present invention discloses a particulate photocatalytic water treatment device.

[0006] The present invention provides a particulate photocatalytic water treatment device, including a water tank with an open top, and a first side plate and a second side plate arranged opposite to each other in the water tank; the first side plate is lower than the second side plate; the first side plate is provided with a water inlet pipe, and the second side plate is provided with a water outlet pipe.

[0007] The water tank is equipped with:

[0008] The water guide pipe is arranged at an angle, with its lower end connected to the outlet of the water inlet pipe and its upper end pointing towards the second side plate; a throat is provided in the middle of the water guide pipe, and the diameter of the throat increases from the middle to both ends.

[0009] The guide plate is arranged at an angle and located below the water guide pipe. The upper end of the guide plate is connected to the second side plate, and the lower end points to the first side plate. The angle of inclination of the water guide pipe is configured such that after the wastewater is sprayed out from the water guide pipe, it falls on the upper end of the guide plate.

[0010] The base plate is arranged at an angle and located below the guide plate; granular or powdered photocatalyst is installed at the lower end of the base plate.

[0011] The tube is connected at one end to the smallest diameter part of the throat, and the other end is directly opposite and close to the bottom of the base plate.

[0012] The filter cloth is placed at the inlet of the water outlet pipe to trap the photocatalyst inside the water tank.

[0013] During operation, a photocatalyst is first installed at the lower end of the base plate. The water pump pumps the wastewater to be treated into the inlet pipe. As the wastewater passes through the throat pipe, the suction pipe draws the photocatalyst into the throat pipe, mixes it with the wastewater, and then sprays it out from the outlet of the guide pipe, flowing to the upper end of the guide plate. As the wastewater flows downward along the guide plate, it is purified by artificial light or solar tube irradiation. The purified wastewater then falls to the upper end of the base plate, where the photocatalyst settles and slides to the lower end of the base plate, where it is extracted by the suction pipe for reuse. The wastewater flows out from the outlet pipe after passing through the filter cloth. The photocatalyst remaining in the wastewater is adsorbed on the filter cloth.

[0014] The beneficial effects of this invention are: 1. The photocatalyst enters the position with the smallest diameter of the throat tube, resulting in a small wastewater volume and a fast wastewater flow rate, which allows for thorough mixing with the wastewater; 2. The throat tube mixing method, compared to the traditional impeller-driven mixing method, not only avoids wear on the photocatalyst caused by the impeller, but also has a simple structure and low cost; 3. It enables the reuse of the photocatalyst, which can reduce costs and improve the utilization rate of the photocatalyst.

[0015] The structure of the extraction tube directly affects the stability of the photocatalyst extraction. Therefore, a further improvement is made: the extraction tube is arranged vertically; a recessed, upward-facing collection groove is provided on the bottom plate near the first side plate. This arrangement eliminates friction between the photocatalyst and the inner wall of the extraction tube, facilitating the entry of the photocatalyst into the throat.

[0016] When the filter cloth adsorbs too much photocatalyst, it will cause blockage. Based on this, a further improvement is made: a spring is connected to the upper end face of the upper part of the guide plate. One end of the spring is fixedly connected to the guide plate, and the other end is suspended and extends towards the first side plate, so that the spring is elastic; and the suspended end of the spring is tilted downward; a connecting rod is connected to the middle part of the filter cloth. After the wastewater is sprayed out from the water guide pipe, it falls on the suspended part of the spring, causing the spring to shake up and down, and driving the filter cloth to shake up and down, so that the photocatalyst is detached from the filter cloth.

[0017] Because the spring is constantly impacted by wastewater, its elasticity is unstable, making it difficult to reliably peel the photocatalyst off the filter cloth. Based on this, a further improvement is made: a spring is connected between the suspended part of the spring and the guide plate.

[0018] The filter cloth is installed at the outlet pipe. The upper end of the connecting rod is connected to the spring plate, making the connecting rod inclined and difficult to stably shake the filter cloth. Therefore, a further improvement is made: a gap is provided between the bottom plate and the second side plate, forming a sedimentation chamber; a vertically arranged right side plate is connected to the end of the bottom plate near the second side plate, and a horizontally arranged top plate and a vertically arranged left side plate are sequentially connected to the top of the right side plate; the left side plate extends downwards and is spaced apart from the bottom plate; the right side plate has an outlet; one end of the filter cloth is connected to the top plate, and the other end is connected to the right side plate, with the connection point between the filter cloth and the right side plate located below the outlet. This allows the connecting rod to be vertically arranged and drive the filter cloth to shake up and down, thus facilitating the detachment of the photocatalyst from the filter cloth.

[0019] Since some wastewater contains toxic substances that are difficult to purify by photocatalysis, a further improvement is made by installing an electrode plate on the lower end face of the top plate.

[0020] The flow time of wastewater on the guide plate directly affects the photocatalytic efficiency and the wastewater purification efficiency. Based on this, a further improvement is to set the middle part of the guide plate as a corrugated plate.

[0021] To improve the speed and efficiency of the photocatalyst flowing to the lower end of the substrate, a further design is to install an oscillator on the lower end face of the substrate.

[0022] Wastewater is sprayed directly from the water guide pipe and falls onto the guide plate. The contact area with light is small, resulting in low photocatalytic efficiency. Based on this, a further improvement is made by installing a flat nozzle at the outlet of the water guide pipe. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] In the diagram: 1. Water tank; 2. First side plate; 3. Second side plate; 4. Inlet pipe; 5. Outlet pipe; 6. Guide pipe; 7. Throat; 8. Guide plate; 9. Bottom plate; 10. Pull pipe; 11. Filter cloth; 12. Collection tank; 13. Spring; 14. Connecting rod; 15. Sedimentation chamber; 16. Right side plate; 17. Top plate; 18. Left side plate; 19. Outlet; 20. Electrode plate; 21. Corrugated plate; 22. Vibrator; 23. Nozzle; 24. Spring. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0027] like Figure 1As shown, the present invention discloses a particulate photocatalytic water treatment device, including a water tank 1 with an open top, and a first side plate 2 and a second side plate 3 arranged opposite to each other in the water tank 1; the first side plate 2 is lower than the second side plate 3; the first side plate 2 is provided with a water inlet pipe 4, and the second side plate 3 is provided with a water outlet pipe 5.

[0028] The water tank 1 is provided with a bottom plate 9, a guide plate 8 and a water pipe 6 arranged from bottom to top.

[0029] One end of the base plate 9 is connected to the first side plate 2, and a downwardly recessed, V-shaped collection trough 12 is provided near the first side plate 2. The wall of the collection trough 12 extends upwards at an angle, and granular or powdered photocatalyst is placed inside the collection trough 12. The other end of the base plate 9 is connected to a vertically arranged right side plate 16. The lower end of the right side plate 16 is connected to the bottom of the water tank 1, so that the base plate 9, the first side plate 2, the second side plate 3, and the bottom of the water tank 1 form a closed cavity. There is a gap between the right side plate 16 and the second side plate 3, forming a sedimentation chamber 15. The top of the right side plate 16 is connected in sequence to a horizontally arranged top plate 17 and a vertically arranged left side plate 18; the left side plate 18 extends downwards and is spaced apart from the base plate 9; an outlet 19 is provided at the upper part of the right side plate 16. Thus, the base plate 9, the right side plate 16, the top plate 17, and the left side plate 18 form an inner tank.

[0030] A filter cloth 11 is also installed in the inner tank. One end of the filter cloth 11 is connected to the top plate 17, and the other end is connected to the right side plate 16. The connection between the filter cloth 11 and the right side plate 16 is located below the outlet 19, thereby blocking the outlet 19.

[0031] The guide vane 8 forms an angle with the horizontal plane. Its upper end is fixedly connected to the second side plate 3 near the top, and its lower end extends towards the first side plate 2, with a gap between them. The lower end of the guide vane 8 abuts against the connection between the top plate 17 and the left side plate 18, thus supporting the guide vane 8. A corrugated plate 21 is provided in the middle of the guide vane 8.

[0032] A spring piece 13 is provided on the upper side of the upper end of the guide plate 8. One end of the spring piece 13 is fixedly connected to the guide plate 8, and the other end extends downward and is suspended in the air, so that the spring piece 13 has elasticity. The suspended end of the spring piece 13 is inclined downward and is also connected to the guide plate 8 by a spring 24.

[0033] The suspended end of the spring piece 13 is also connected to the middle of the filter cloth 11 via a connecting rod 14, so that when the spring piece 13 swings back and forth, it can drive the filter cloth 11 to move up and down. The connecting rod 14 passes through the guide plate 8 and the top plate 17, and the connecting rod 14 will not touch the guide plate 8 and the top plate 17 when it moves up and down. The connecting rod 14 is arranged vertically, so that the up and down shaking amplitude of the connecting rod 14 is maximized, which facilitates the photocatalyst to detach from the filter cloth 11.

[0034] The water guide pipe 6 forms an angle with the horizontal plane. Its inlet is connected to the outlet of the water inlet pipe 4. The outlet of the water guide pipe 6 is obliquely upward, pointing towards the second side plate 3, and is spaced apart from the second side plate 3. When wastewater is sprayed out from the water guide pipe 6, it falls on the spring plate 13. The spring plate 13 swings back and forth under the action of water pressure, its own elasticity, and the elasticity of the spring 24.

[0035] A throat 7 is located in the middle of the water pipe 6, and the diameter of the throat 7 increases from the middle to both ends. A suction pipe 10 is connected to the throat 7, with its lower end facing and close to the collection tank 12, and its upper end connected to the point where the diameter of the throat 7 is smallest. As a result, a low-pressure zone is formed at the point where the diameter of the throat 7 is smallest based on the Venturi effect, creating a pressure difference with the collection tank 12, thereby driving the photocatalyst to flow from the collection tank 12 to the throat 7.

[0036] Moreover, the suction tube 10 is arranged vertically, so when the photocatalyst enters the throat tube 7 from the suction tube 10, no friction is generated, which can improve its suction efficiency.

[0037] The outlet of the water guide pipe 6 is also equipped with a flat nozzle 23, which disperses the water flow and forms a waterfall-like flow, thereby increasing the distribution area of ​​wastewater on the guide plate 8, increasing the contact area between wastewater and light, and improving the decomposition efficiency of organic matter in wastewater.

[0038] The angle of inclination of the water guide pipe 6 to the horizontal plane is greater than or equal to the angle of inclination of the guide plate 8 to the horizontal plane. In this embodiment, the angle of inclination of the water guide pipe 6 is 45°, and the angle of inclination of the guide plate 8 is 30-45°. This setting ensures that the wastewater can flow downward along the guide plate 8 while increasing the length of the guide plate 8, thereby increasing the area of ​​the guide plate 8.

[0039] An electrode plate 20 is also installed in the inner tank and fixedly mounted on the lower end face of the top plate 17. The electrode plate 20 is made of titanium with a surface of high-temperature treated titanium dioxide. The spacing between the electrodes is 3-8 cm, and it is connected to a DC power supply of 30-45V. When the wastewater contains toxic substances, the electrode plate 20 is activated to decompose the toxic substances in the wastewater.

[0040] Multiple transducers 22 are also installed inside the cavity and are fixedly mounted on the lower end face of the base plate 9. These transducers 22 are ultrasonic transducers, which drive the base plate 9 to vibrate through their vibration, thereby improving the speed and efficiency of the photocatalyst flowing to the collection tank 12.

[0041] During operation, a photocatalyst is first installed in the collection tank 12. A water pump pumps the wastewater to be treated into the inlet pipe 4. As the wastewater passes through the throat pipe 7, the suction pipe 10 draws the photocatalyst into the throat pipe 7, mixes it with the wastewater, and then sprays it out from the outlet of the guide pipe 6, onto the suspended portion of the spring plate 13. It then flows downwards to the upper end of the guide plate 8. As the wastewater flows downwards along the guide plate 8, it is purified by artificial light or solar tube irradiation. The purified wastewater then falls to the upper end of the bottom plate 9, where the photocatalyst settles and slides to the lower end of the bottom plate 9, where it is extracted by the suction pipe 10 for reuse. After passing through the filter cloth 11, the wastewater enters the sedimentation chamber 15, where solid impurities are further precipitated, and finally flows out from the outlet pipe 5. The residual photocatalyst in the wastewater is adsorbed onto the filter cloth 11. As the spring plate 13 shakes up and down, the filter cloth 11 also shakes up and down, causing the photocatalyst adsorbed on the filter cloth 11 to detach and settle on the bottom plate 9.

[0042] The beneficial effects of this invention are: 1. The photocatalyst enters the smallest diameter position of the throat tube 7, resulting in a small wastewater volume and a fast wastewater flow rate, allowing for thorough mixing with the wastewater; 2. The mixing method using the throat tube 7, compared to the traditional impeller-driven mixing method, not only avoids wear on the photocatalyst caused by the impeller, but also has a simple structure and low cost; 3. It enables the reuse of the photocatalyst, reducing costs and improving the utilization rate of the photocatalyst; 4. The corrugated plate 21 increases the surface area of ​​the water and allows some of the photocatalyst to precipitate at the troughs of the corrugated plate 21, thereby providing continuous catalytic action and improving the decomposition efficiency of organic matter; 5. The spring 24 provides additional elasticity to the spring plate 13, improving its elastic performance and enabling the spring plate 13 to reciprocate stably.

[0043] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A particulate photocatalytic water treatment device, characterized in that: The water tank (1) includes an open top, and the water tank (1) is provided with a first side plate (2) and a second side plate (3) arranged opposite to each other; the first side plate (2) is lower than the second side plate (3); the first side plate (2) is provided with a water inlet pipe (4), and the second side plate (3) is provided with a water outlet pipe (5); The water tank (1) is equipped with: The water guide pipe (6) is arranged at an angle, with its lower end connected to the outlet of the water inlet pipe (4) and its upper end pointing towards the second side plate (3); a throat pipe (7) is provided in the middle of the water guide pipe (6), and the diameter of the throat pipe (7) increases from the middle to both ends; The guide plate (8) is arranged at an angle and located below the water guide pipe (6). The upper end of the guide plate (8) is connected to the second side plate (3), and the lower end points to the first side plate (2). The angle of inclination of the water guide pipe (6) is configured such that after the wastewater is sprayed out from the water guide pipe (6), it falls on the upper end of the guide plate (8). The base plate (9) is arranged at an angle and is located below the guide plate (8); the bottom end of the base plate (9) is equipped with a granular or powdered photocatalyst. The tube (10) is connected at one end to the smallest diameter of the throat tube (7), and the other end is directly opposite and close to the lower end of the bottom plate (9); A gap is provided between the bottom plate (9) and the second side plate (3), forming a sedimentation chamber (15); a vertically arranged right side plate (16) is connected to one end of the bottom plate (9) near the second side plate (3), and a horizontally arranged top plate (17) and a vertically arranged left side plate (18) are sequentially connected to the top of the right side plate (16); the left side plate (18) extends downward and is spaced apart from the bottom plate (9); The right side plate (16) is provided with an outlet (19); One end of the filter cloth (11) is connected to the top plate (17), and the other end is connected to the right side plate (16). The connection between the filter cloth (11) and the right side plate (16) is located below the outlet (19), thus intercepting the photocatalyst in the water tank (1).

2. The particulate photocatalytic water treatment device according to claim 1, characterized in that: The extraction tube (10) is arranged vertically; The bottom plate (9) is provided with a recessed, upward-facing collection trough (12) near the first side plate (2).

3. The particulate photocatalytic water treatment device according to claim 1, characterized in that: A spring sheet (13) is connected to the upper end face of the upper part of the guide plate (8). One end of the spring sheet (13) is fixedly connected to the guide plate (8), and the other end is suspended and extends towards the first side plate (2), so that the spring sheet (13) is elastic; and the suspended end of the spring sheet (13) is inclined downward. The suspended part of the spring (13) is connected to the middle part of the filter cloth (11) by a connecting rod (14). After the wastewater is sprayed out from the water pipe (6), it falls on the suspended part of the spring piece (13).

4. The particulate photocatalytic water treatment device according to claim 3, characterized in that: A spring (24) is also connected between the suspended part of the spring (13) and the guide plate (8).

5. The particulate photocatalytic water treatment device according to claim 1, characterized in that: An electrode plate (20) is installed on the lower end face of the top plate (17).

6. The particulate photocatalytic water treatment device according to claim 1, characterized in that: The middle part of the guide plate (8) is provided as a corrugated plate (21).

7. The particulate photocatalytic water treatment device according to claim 1, characterized in that: A vibrator (22) is installed on the lower end face of the base plate (9).

8. The particulate photocatalytic water treatment device according to claim 1, characterized in that: The outlet of the water pipe (6) is equipped with a flat-mouth nozzle (23).

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