Photocatalytic degradation dye wastewater treatment system
By introducing photovoltaic power generation and catalyst recovery units into the photocatalytic degradation dye wastewater treatment system, combined with Fresnel lens and paddle stirrer, the problems of high energy consumption and unsuitable for large-scale treatment in the prior art are solved, and high efficiency is achieved , low-cost sewage treatment.
Patent Information
- Application Number
- CN202421058436.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-15
AI Technical Summary
The existing photocatalytic degradation dye wastewater treatment technology is not yet mature, and it cannot directly utilize sunlight, has high energy consumption, and is not suitable for large-scale and continuous wastewater treatment.
A system including photovoltaic power generation unit, photocatalytic degradation unit and catalyst recovery unit was designed. Powered by solar panels, combined with Fresnel lenses and paddle-type stirrer, to achieve vertical incident and efficient stirring of solar light, and through the catalyst recovery unit Improve catalyst utilization.
Reduces energy consumption, achieves night operation, and reduces treatment costs through catalyst recovery, suitable for large-scale and continuous wastewater treatment.
Smart Images
Figure CN222312786U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sewage treatment, and in particular relates to a photocatalytic degradation dye wastewater treatment system. Background Art
[0002] Dye wastewater is untreated sewage generated during the printing and dyeing process. This type of wastewater has complex components, poor biodegradability, high toxicity, and high chromaticity, which will have an impact on the human living environment that cannot be ignored. The main treatment methods at present are physical, biological, and chemical methods. The physical method is mainly physical adsorption and membrane separation, but the disadvantage is that it is easy to produce secondary pollution; the biological method mainly cultivates microorganisms and uses the metabolism of microorganisms, but the disadvantage is that the treatment time is long and the effect is unstable; the traditional chemical method mainly uses flocculation, but the disadvantage is that a large amount of sludge will be produced, which increases the cost of subsequent treatment. Photocatalytic degradation of dye wastewater uses sunlight as the reaction light source. The process is simple, the conditions are mild, the cost is low, and it is easy to operate. It is an ideal sewage treatment method. While alleviating the environmental problems caused by sewage discharge, it can also reduce dependence on fossil fuels and electricity and reduce sewage treatment costs.
[0003] At present, the photocatalytic degradation of dye wastewater is still in the laboratory research stage, and there are few cases on the market that are actually used for actual sewage treatment. The laboratory uses a photocatalytic reactor, which is mainly composed of a light source system, a reaction vessel, a magnetic stirring device and a cooling system. This type of photocatalytic reactor often cannot directly use sunlight, but must use a simulated light source. On this basis, a cooling device for the light source must be added, which increases energy consumption to a certain extent. At the same time, due to the limitations of the reaction vessel, the photocatalytic reactor can only conduct experiments intermittently, and the amount of sewage water in each experiment should not be too large. Therefore, it is not suitable for actual large-scale and continuous sewage treatment. Utility Model Content
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a photocatalytic degradation dye wastewater treatment system to solve the problems in the prior art.
[0005] The purpose of the utility model can be achieved through the following technical solutions:
[0006] A photocatalytic degradation dye wastewater treatment system comprises a photovoltaic power generation unit, a photocatalytic degradation unit and a catalyst recovery unit, wherein the photovoltaic power generation unit supplies power to the photocatalytic degradation unit, and the catalyst recovery unit is used to recover the catalyst after the photocatalytic degradation unit reacts;
[0007] The photocatalytic degradation unit comprises a photocatalytic reaction pool, which is provided with a water inlet and a water outlet, and a catalyst delivery port is provided at the water inlet; the top and bottom of the photocatalytic reaction pool are respectively provided with a Fresnel lens and a bottom lighting device, and under the refraction effect of the Fresnel lens, sunlight is vertically incident on the photocatalytic reaction pool.
[0008] Furthermore, a paddle stirrer is also provided in the photocatalytic reaction tank.
[0009] Furthermore, the photovoltaic power generation unit can provide power for the bottom lighting device and the paddle stirrer.
[0010] Furthermore, the photovoltaic power generation unit includes a solar panel, a battery and an inverter which are electrically connected in sequence. The solar panel collects solar energy and converts it into direct current which is then stored in the battery. The direct current stored in the battery is output through the inverter as directly usable alternating current to power the photocatalytic degradation unit.
[0011] Furthermore, a telescopic rod is provided on one side of the solar panel, and the telescopic rod can be extended and retracted to adjust the tilt angle of the solar panel.
[0012] Furthermore, the catalyst recovery unit comprises a sedimentation tank connected to the water outlet, an inclined plate is arranged above the sedimentation tank, and a sludge hopper is arranged below the sedimentation tank.
[0013] Furthermore, a sludge discharge pipe is connected below the sludge hopper, and the sludge discharge pipe can be communicated with the catalyst delivery port.
[0014] Furthermore, a drain port is provided on one side of the bottom of the photocatalytic reaction tank for discharging the spent catalyst.
[0015] A sewage treatment device comprises the above-mentioned photocatalytic degradation dye wastewater treatment system.
[0016] Beneficial effects of the utility model:
[0017] The system of the utility model can reduce the consumption of electricity and other energy sources, and can still operate at night when there is no sunlight. In order to increase the utilization effect of sunlight, a Fresnel lens is added to achieve the effect of focusing light, and a recovery device is also provided to achieve the catalyst recovery and utilization effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 It is a schematic diagram of the structure of a photovoltaic power generation unit;
[0020] Figure 2 is a schematic diagram of the structure of a photocatalytic degradation unit;
[0021] Figure 3 It is a schematic diagram of the structure of the catalyst recovery unit.
[0022] In the figure: 1-photocatalytic reaction tank, 2-Fresnel lens, 3-paddle stirrer, 4-underwater lighting device, 5-solar panel, 6-telescopic rod, 7-battery, 8-inverter, 9-water inlet, 10-water outlet, 11-catalyst delivery port, 12-drainage port, 13-sedimentation tank, 14-inclined plate, 15-sludge hopper, 16-sludge discharge pipe. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] A photocatalytic degradation dye wastewater treatment system, comprising: a photovoltaic power generation unit, a photocatalytic degradation unit and a catalyst recovery unit, wherein the photovoltaic power generation unit provides power for the photocatalytic degradation unit, and the catalyst recovery unit is used to recover the catalyst remaining after the photocatalytic degradation unit reacts;
[0025] like Figure 1 As shown, the photovoltaic power generation unit includes a solar panel 5, a battery 7 and an inverter 8 which are electrically connected in sequence. The solar panel 5 collects solar energy and converts it into direct current and then stores it in the battery 7. The direct current stored in the battery 7 is output through the inverter 8 as alternating current that can be directly used, thereby supplying energy to the photocatalytic degradation unit.
[0026] In this embodiment, a telescopic rod 6 is provided on one side of the solar panel 5. The telescopic rod 6 can be extended and retracted to adjust the tilt angle of the solar panel 5 so that the solar panel is approximately perpendicular to the sunlight.
[0027] like Figure 2 As shown, the photocatalytic degradation unit includes a photocatalytic reaction pool 1, and a water inlet 9 and a water outlet 10 are provided on the photocatalytic reaction pool 1. The dye wastewater enters the photocatalytic reaction pool 1 from the water inlet 9 and is discharged from the water outlet 10 after catalytic degradation; a catalyst delivery port 11 is provided at the water inlet 9 for delivering the photocatalyst;
[0028] The top and bottom of the photocatalytic reaction pool 1 are respectively provided with a Fresnel lens 2 and an underwater lighting device 4. Under the refraction effect of the Fresnel lens 2, the sunlight is vertically incident on the photocatalytic reaction pool 1, and combined with the irradiation effect of the underwater lighting device 4, the illumination effect is improved and the photocatalytic efficiency is accelerated.
[0029] A paddle agitator 3 is also provided in the photocatalytic reaction pool 1. When the water level in the reaction pool exceeds the height limit of the paddle agitator 3, the paddle agitator 3 is started, and the wastewater is degraded during the residence time passing through the photocatalytic reaction pool 1. The dye wastewater after catalytic degradation is discharged from the water outlet 10 with part of the catalyst and enters the catalyst recovery unit.
[0030] It is worth mentioning that, in the present embodiment, the photovoltaic power generation unit can provide power for the underwater lighting device 4 and the paddle stirrer 3 .
[0031] like Figure 3 As shown, the catalyst recovery unit includes a sedimentation tank 13, an inclined plate 14 is arranged above the sedimentation tank 13, and a sludge hopper 15 is arranged below. The dye wastewater after catalytic degradation carries part of the catalyst and is discharged into the sedimentation tank 13 from the water outlet 10. The water flows from bottom to top, and the catalyst solids carried by the water settle from top to bottom and hit the inclined plate 14. The catalyst adheres to the inclined plate, then slides down the inclined plate 14 under the action of gravity, and finally sinks into the sludge hopper 15.
[0032] In this embodiment, a sludge discharge pipe 16 is connected below the sludge hopper 15 , and the sludge discharge pipe 16 can be communicated with the catalyst introduction port 11 , and the recovered catalyst can pass through the photocatalytic reaction tank 1 from the catalyst introduction port 11 together with the newly added dye wastewater.
[0033] It is worth mentioning that a drain port 12 is provided on one side of the bottom of the photocatalytic reaction tank 1. If the performance of the catalyst decreases after a certain stage of the reaction, the water outlet 10 is closed first and the addition of new catalyst is stopped. At this time, the catalyst introduction port 11 will also have recycled catalyst added. When no catalyst enters the catalyst introduction port 11, the water inlet 9 is closed again, and the sewage and catalyst in the photocatalytic reaction tank 1 are discharged from the drain port 12 together with the catalyst, and enter the external water storage tank. The failed catalyst is collected and processed, and the sewage in the water storage tank and the new sewage enter the photocatalytic reaction tank 1 for treatment.
[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.
Claims
1. A photocatalytic degradation dye wastewater treatment system, characterized in that: It includes a photovoltaic power generation unit, a photocatalytic degradation unit and a catalyst recovery unit. The photovoltaic power generation unit supplies power to the photocatalytic degradation unit, and the catalyst recovery unit is used to recover the catalyst after the photocatalytic degradation unit reacts. The photocatalytic degradation unit comprises a photocatalytic reaction pool (1), wherein a water inlet (9) and a water outlet (10) are provided on the photocatalytic reaction pool (1), and a catalyst delivery port (11) is provided at the water inlet (9); a Fresnel lens (2) and an underwater lighting device (4) are provided at the top and bottom of the photocatalytic reaction pool (1), respectively, and under the refraction effect of the Fresnel lens (2), sunlight is vertically incident on the photocatalytic reaction pool (1).
2. A photocatalytic degradation dye wastewater treatment system according to claim 1, characterized in that: The photocatalytic reaction pool (1) is also provided with a paddle stirrer (3).
3. A photocatalytic degradation dye wastewater treatment system according to claim 2, characterized in that: The photovoltaic power generation unit can supply power to the underwater lighting device (4) and the paddle stirrer (3).
4. A photocatalytic degradation dye wastewater treatment system according to claim 1, characterized in that: The photovoltaic power generation unit comprises a solar panel (5), a storage battery (7) and an inverter (8) which are electrically connected in sequence. The solar panel (5) collects solar energy and converts it into direct current which is then stored in the storage battery (7). The direct current stored in the storage battery (7) is outputted as directly usable alternating current through the inverter (8) to supply energy to the photocatalytic degradation unit.
5. A photocatalytic degradation dye wastewater treatment system according to claim 4, characterized in that: A telescopic rod (6) is provided on one side of the solar panel (5), and the telescopic rod (6) can be extended and retracted to adjust the tilt angle of the solar panel (5).
6. The photocatalytic degradation dye wastewater treatment system according to claim 1 is characterized in that: The catalyst recovery unit comprises a sedimentation tank (13) connected to the water outlet (10), an inclined plate (14) is arranged above the sedimentation tank (13), and a sludge hopper (15) is arranged below the sedimentation tank (13).
7. A photocatalytic degradation dye wastewater treatment system according to claim 6, characterized in that: A mud discharge pipe (16) is connected below the mud hopper (15), and the mud discharge pipe (16) can be communicated with the catalyst delivery port (11).
8. The photocatalytic degradation dye wastewater treatment system according to claim 1 is characterized in that: A drain port (12) is provided on one side of the bottom of the photocatalytic reaction pool (1) for discharging spent catalyst.