Piezoelectric photocatalytic coupling integrated water treatment reactor fused with magnetic field power generation technology

Abstract

The particle hopper is arranged at the lower part of the reactor and is used for collecting piezoelectric electro-catalytic particles, and the emptying pipe is arranged at the bottom of the particle hopper and is used for discharging and replacing the piezoelectric electro-catalytic particles. A water inlet pipe is arranged on the side face, fluid kinetic energy is combined to drive a propeller to rotate, piezoelectric electro-catalytic particles are conveyed to the upper portion of the reactor from the bottom, the piezoelectric electro-catalytic particles are evenly dispersed to a piezoelectric electro-catalytic area under the action of a particle baffle and rotation, and a stirring paddle is arranged on a spiral rod to further evenly stir the piezoelectric electro-catalytic particles in a water body. An aeration device is arranged on the lower portion of the piezoelectric electro-catalysis area, an LED lamp panel is arranged around the piezoelectric electro-catalysis area, a magnetic field is arranged below the lamp panel, the piezoelectric electro-catalysis particle treatment efficiency is improved, and meanwhile an annular wire on a stirring paddle is used for cutting magnetic induction lines to generate power to supply power to the LED lamp panel. The treated water passes through the flow guide area and the flow baffle to complete separation of particles and water flow in the settling area, the water flow is discharged through a water outlet pipe connected with the water outlet tank, and the piezoelectric electro-catalysis particles continue to participate in sewage purification.

Description

Technical Field

[0001] The present invention relates to a photocatalytic reactor that can be used in wastewater purification technology and water treatment disinfection technology, mainly involving magnetic field power generation and the technology of transporting piezoelectric photocatalytic particles by a spiral rod. It makes full use of the driving effect of the kinetic energy of fluids (including water flow and air flow) on the propeller and the magnetic field power generation technology to supply electrical energy to the LED lamp to achieve the energy-saving goal, belonging to the fields of water treatment and environmental protection. Background Art

[0002] Water resources are an important foundation for the sustainable development of human society. However, with the continuous development of society, the problem of water resource shortage has become a serious constraint on sustainable development. Therefore, the development of water treatment technology is an effective solution to alleviate the water source crisis and an effective way to improve water use efficiency.

[0003] Piezoelectric materials are crystalline materials that generate a voltage across their two end faces when subjected to pressure. Due to their characteristic of converting mechanical energy into electrical energy and vice versa, their application research in water treatment has become increasingly extensive.

[0004] In an aqueous environment, piezoelectric materials can collect mechanical energy and convert it into electrical energy for redox reactions, namely the piezoelectric catalytic system; or combine with photocatalysis to utilize the internal voltage to accelerate the migration of photo-generated carriers and enhance the redox ability of the system, namely the piezoelectric photocatalytic system.

[0005] When a piezoelectric material is deformed by an external force along its structurally asymmetric direction, polarization occurs inside it, and at the same time, opposite charges appear on its two opposite surfaces, making its centrosymmetric crystal piezoelectric. The polarization of the charges also changes with the change of the acting force.

[0006] The combination of photocatalysis and piezoelectric catalysis technologies can form highly efficient wastewater and disinfection composite materials, and some materials themselves have the dual functions of photocatalysis and piezoelectric catalysis.

[0007] Since the penetration ability of light in water is weak and cannot completely penetrate the water body, it is necessary to provide external energy to excite the photocatalyst. Usually, continuous stirring is required to ensure that sufficient light can shine on the surface of the photocatalyst, so that the photocatalytic degradation process is more complete. In piezoelectric photocatalysis technology, mechanical force can provide energy for piezoelectric materials, making it more energy-efficient.

[0008] Under mechanical stirring, mass transfer can be accelerated, and the ultrasonic cavitation effect can induce sonocatalysis to accelerate the overall catalytic activity.

[0009] The application of magnetic fields is an effective strategy to improve photocatalytic performance. It is both adjustable and compatible with existing photocatalytic systems. Magnetic field-assisted photocatalysis can promote the design of new catalyst systems and thus provide an effective reaction system.

[0010] External magnetic fields can alter the spin states of molecules and their local electronic structures, thereby affecting light absorption. Under the application of different external fields, polarization effects can be effectively achieved, providing a more convenient and versatile option for more efficient photocatalysis.

[0011] Magnetic fields can change the spin states of electrons in photocatalysts, having a great impact on their photocatalytic performance. Moreover, the technology of enhancing local magnetic flux not only does not change the photocatalyst itself but can also be applied to the photocatalytic system by simply coupling magnetic particles with the photocatalyst.

[0012] After the introduction of magnetic field modulation into the power generation system to replace the traditional power generation mode, problems such as mechanical gear vibration, noise, and lubrication that are inevitable in themselves are avoided, thereby improving the efficiency and working reliability of the entire wind power system.

[0013] Magnetic gears rely on the magnetic field modulation effect to transmit torque. The non-contact transmission characteristic between their input and output gives them special advantages in wind turbines compared to mechanical gears. It ensures the feasibility of magnetic field power generation and is an important step towards energy conservation.

[0014] Publication number CN 201473358 U provides a sewage treatment device with spiral guide plates and ultraviolet light generation in the middle. The swirling structure is used to slow down the rising speed, extend the contact time, and improve the treatment effect.

[0015] Publication number CN 117323726 A provides a spiral water filtration device. By setting a spiral blade structure inside the filter cartridge and controlling the forward and reverse rotation of the filter cartridge, automatic switching between water filtration and the flushing and separation of impurities on the inner wall of the filter cartridge is achieved. Compared with the backwashing structure, the flow direction of water does not need to be changed during this process, making the switching between water filtration and the flushing of impurities on the inner wall of the filter cartridge more efficient, thereby greatly improving the water filtration efficiency.

[0016] As demonstrated by Gupta et al. (Gupta B B, Howell J A, Wu D, et al. A helical baffle for cross-flow microfiltration[J]. 1995, 102: 31 - 42.), when a helical baffle exists, the rotational component can reduce the particle deposition rate, enabling the particles to come into contact with the sewage more fully. Summary of the Invention

[0017] The object of the present invention is to provide a sewage rapid treatment reactor with a relatively small floor area, high treatment efficiency, and simple operation, aiming at sewage treatment and reuse, to meet different water use requirements. By combining magnetic field technology, the performance of piezoelectric photocatalytic particles in the reactor is improved, thereby enhancing the treatment efficiency. Then, through magnetic field power generation technology, the purpose of self-power supply of the board is achieved to reach the energy conservation goal.

[0018] In view of the current shortcomings of sewage treatment and reuse technologies, the present invention proposes a technical solution for a piezoelectric photocatalytic coupled integrated water treatment reactor with spiral lifting and stirring. First, a piezoelectric material and a photocatalytic material are combined to achieve high-efficiency piezoelectric photocatalysis. When there are pollutants on the surface of the piezoelectric photocatalytic particles that hinder the light transmittance, the piezoelectric material can absorb external forces and exert advanced oxidation to degrade pollutants from the inside, thereby reducing or even completely removing the hindrance of pollutants to the piezoelectric photocatalytic particles and improving the light propagation efficiency. Secondly, by changing the size and weight of the piezoelectric photocatalytic particles and combining with the characteristics of the LED light board, a suitable wavelength is selected to achieve higher treatment effects and at the same time effectively separate the piezoelectric photocatalytic particles from the water flow. Thirdly, the kinetic energy of the fluid (including water flow and air flow) is fully utilized to push the propeller, driving the spiral rod to rotate. During this process, the piezoelectric photocatalytic particles are transported to the upper part of the reactor, and the surface of the piezoelectric photocatalytic particles can be self-cleaned to destroy the pollutants accumulated on its surface. Then, through the action of the baffle and the stirring paddle, the piezoelectric photocatalytic particles are suspended in the piezoelectric photocatalytic zone. An aeration device is provided at the bottom of the piezoelectric photocatalytic zone to promote the rate of the advanced oxidation reaction by oxygenation, and at the same time increase the collision between the particles and the water flow. The gas can provide power for the rotation of the propeller and also provide buoyancy for the suspension of the piezoelectric photocatalytic particles. Finally, the water inlet adopts vortex water inlet to increase the collision energy and probability of the particles.

[0019] To implement the above solution, the present invention designs a piezoelectric photocatalytic coupled integrated water treatment reactor with spiral lifting and stirring. Piezoelectric photocatalytic particles are placed in the reactor main body (i.e., the piezoelectric photocatalytic zone), and a particle hopper is provided at the bottom. The particle hopper serves to collect the piezoelectric photocatalytic particles. A spiral rod is arranged in the middle of the piezoelectric photocatalytic zone. A cylinder wall is attached around the spiral rod, and stirring paddles are provided on the cylinder wall. The stirring paddles are coated with annular wires and insulation measures are taken. A particle baffle is arranged at the top of the spiral rod, and a propeller is installed above the particle baffle. The purpose is that when the propeller utilizes the kinetic energy of the fluid (including water flow and air flow), it drives the spiral rod to rotate by its own rotation, thereby smoothly transporting the piezoelectric photocatalytic particles at the bottom to the upper part of the reactor. Then, through the action of the particle baffle, the piezoelectric photocatalytic particles are intercepted and evenly dispersed into the piezoelectric photocatalytic zone by centrifugal force under the rotation condition. During this process, the stirring paddles can play a stirring role to make the distribution of the piezoelectric photocatalytic particles more uniform.

[0020] In the reactor as described above, when the piezoelectric photocatalytic particles are transported to the upper part of the reactor through the spiral rod, due to effects such as friction and collision, piezoelectric catalysis will occur, which can achieve self-cleaning of the pollutants on the surface of the piezoelectric photocatalytic particles.

[0021] For the reactor described above, LED light panels are provided on both sides of the piezoelectric photocatalysis zone, and a magnetic field is provided under the light panels, which can not only improve the piezoelectric photocatalysis efficiency, but also generate electricity by cutting magnetic induction lines with the magnetic field, so as to supply the power demand of the LED light panels.

[0022] For the reactor described above, after the sewage is treated by the piezoelectric photocatalysis zone, it passes through the diversion zone, and under the action of the baffle plate, the separation of particles and water flow is realized in the sedimentation zone. The piezoelectric photocatalytic particles can precipitate to the particle hopper and be recycled, while the water flow flows out through the water outlet pipe connected to the water outlet tank.

[0023] For the reactor described above, an emptying pipe is provided at the bottom of the particle hopper, and the piezoelectric photocatalytic particles can be replaced.

[0024] For the reactor described above, an annular aeration device is arranged at the bottom of the piezoelectric photocatalysis zone to improve the oxygen content in the water body.

[0025] For the reactor described above, the piezoelectric photocatalytic particles can be particles with a density greater than that of water, such as millimeter-sized or micron-sized particles. The particles can be composite piezoelectric photocatalytic and photocatalytic composite materials, or materials with piezoelectric and photocatalytic functions, or materials with coated piezoelectric and photocatalytic functions.

[0026] For the reactor described above, the water inlet pipe can enter in a single-side spiral manner or in a multi-point spiral manner.

[0027] For the reactor described above, it adopts a tank structure form. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a three-dimensional schematic diagram of a piezoelectric photocatalytic coupling integrated water treatment reactor with spiral lifting and stirring of the present invention.

[0029] Figure 2 is a front view of the piezoelectric photocatalytic coupling integrated water treatment reactor with spiral lifting and stirring of the present invention.

[0030] Figure 3 is a side view of the piezoelectric photocatalytic coupling integrated water treatment reactor with spiral lifting and stirring of the present invention.

[0031] Figure 4 is a top view of the piezoelectric photocatalytic coupling integrated water treatment reactor with spiral lifting and stirring of the present invention.

[0032] Figure 5 is a three-dimensional view, a front view and a side view of the screw rod device in the reactor of the present invention.

[0033] Names referred to by each numerical label in the drawings: 1 - water inlet pipe, 2 - S pole, 3 - stirring paddle, 4 - piezoelectric photocatalytic particles, 5 - lamp panel, 6 - water outlet tank, 7 - baffle plate, 8 - wire, 9 - driving device, 10 - propeller, 11 - water outlet, 12 - particle baffle, 13 - screw rod, 14 - N pole, 15 - aeration device, 16 - drain pipe, 17 - particle hopper, 18 - air inlet, A - diversion area, B - sedimentation area, C - piezoelectric photocatalytic area. Detailed implementation manners

[0034] The following further illustrates the detailed implementation manners of the present invention in combination with the drawings and technical solutions.

[0035] Add piezoelectric photocatalytic particles 4 to the particle hopper 17 of the reactor. While water enters through the water inlet pipe 1, air is introduced through the air inlet 18 and aerated using the aeration device 15. The kinetic energy of the fluid (including water flow and air flow) drives the propeller 10 to rotate, causing the screw rod 13 to start working. The screw rod 13 can lift the piezoelectric photocatalytic particles 4 in the particle hopper 17 to a high position through rotation. Under the action of the particle baffle 12, they are evenly scattered into the piezoelectric photocatalytic reaction area C. At the same time, the stirring paddle 3 also stirs the piezoelectric photocatalytic particles 4.

[0036] The water inlet adopts a single-side spiral inlet pipe 1 to flow to the piezoelectric photocatalytic area. After being fully treated, it flows through the diversion area A and, under the action of the baffle plate 7, completes the separation of particles and water flow in the sedimentation area B. The particles flow back to the particle hopper 17, and the water flows to the water outlet tank 6 and then flows out through the water outlet pipe 11.

[0037] Under the action of various forces such as the spiral inlet water flow, aeration air flow, stirring of the stirring paddle, and mutual collision, the piezoelectric photocatalytic particles 4 will produce a flattening effect locally, carry out piezoelectric photocatalytic action, and the particles will also produce photocatalytic action, thereby degrading pollutants or disinfecting bacteria, viruses, etc. under the dual action of piezoelectric and photocatalytic.

[0038] During the process of the piezoelectric photocatalytic particles 4 being lifted by the screw rod 13, due to friction, collision, etc., piezoelectric catalytic action will occur, which has a self-cleaning effect on the pollutants on the particle surface.

[0039] Arrange LED lamp panels 5 on both sides of the piezoelectric photocatalytic area, and arrange the magnetic field S pole 2 and N pole 14 under the lamp panels to improve the piezoelectric photocatalytic efficiency; at the same time, the annular wire attached to the stirring paddle 3 can cut the magnetic induction lines to generate electricity under the action of the magnetic field to supply the power demand of the LED lamp panel 5.

[0040] The piezoelectric photocatalytic particles 4 can be discharged and replaced through the drain pipe 16.

[0041] When the driving kinetic energy of the fluid is insufficient, the driving device 9 can be started to drive the reactor to continue running.

Claims

1. A spiral lifting and stirring piezoelectric photocatalytic coupled integrated water treatment reactor, which consists of a piezoelectric photocatalytic particle collection area, a piezoelectric photocatalytic area, and a diversion area from bottom to top, while the outer side is divided into a precipitation area and a particle reflux area.

2. According to the reactor described in claim 1, the lower part of the reactor is a particle hopper for collecting piezoelectric photocatalytic particles. An emptying pipe is provided at the bottom of the particle hopper to discharge and replace the piezoelectric photocatalytic particles. An aeration device is provided at the lower part of the piezoelectric photocatalytic zone to increase the oxygenation of the water body. The water inlet pipe is provided on the side of the reactor. The kinetic energy of the fluid (including water flow and air flow) drives the propeller to rotate, thereby driving the screw rod to rotate so that the piezoelectric photocatalytic particles are transported from the bottom to the upper part of the reactor, during which the surface of the particles is self-cleaned. At the same time, a stirring paddle is provided on the screw rod to uniformly stir the piezoelectric photocatalytic particles in the water body. The treated water passes through the diversion area, and the baffle acts in the sedimentation area to separate the particles from the water flow. The water flow is discharged through the outlet pipe connected to the outlet trough, and the piezoelectric photocatalytic particles continue to participate in sewage purification.

3. According to the reactor described in claim 1, LED light panels are arranged around the piezoelectric photocatalytic zone, and a magnetic field is attached under the light panel. The circular wire on the propeller and the magnetic field are used to generate electricity to meet the power demand of the LED light panel.

4. The reactor according to claim 1, wherein water flows into the reactor in a spiral manner.

5. According to the reactor of claim 1, a baffle is provided on the upper part of the spiral rod to prevent the piezoelectric photocatalytic particles from rising along the spiral rod, so as to change their running route and enter the piezoelectric photocatalytic zone under the rotation of the spiral rod driven by the driving device.

6. The reactor according to claim 1, wherein the piezoelectric photocatalytic particles have both piezoelectric catalysis and photocatalysis functions.

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