A light-concentrating frequency-division sewage treatment system and method based on multi-optical-path photo-thermal photocatalysis

Abstract

The application provides a light-concentrating frequency-division sewage treatment system and method based on multi-optical-path photo-thermal photocatalysis, and belongs to the technical field of sewage treatment. In order to solve the problems that the traditional sewage treatment system cannot effectively utilize full-band sunlight by adopting a single photo-thermal technology mode, and the photocatalytic technology can only utilize specific wavelengths, and the solar energy utilization rate is not high, the system depends on a large amount of traditional energy, and the sewage treatment efficiency is low. According to the position of the sun and the direction of light propagation, the angle of the light concentrator is adjusted, the light concentrator reflects sunlight onto an optical absorption filter, the ultraviolet light and infrared-visible light are separated through the optical absorption filter, the ultraviolet light is reflected onto a light collector in the optical absorption filter, then the light is introduced into a reactor through a light guide pipe for sewage treatment, and the light of the remaining wavelengths is absorbed by the optical absorption filter and then enters a heat receiver, and is circulated in a circulating water pump and a heat exchanger in turn.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a light-concentrating frequency-dividing sewage treatment system and method based on multi-optical-path photo-thermal photocatalysis. BACKGROUND

[0002] When sewage treatment is carried out, there is a certain demand for temperature, especially for biological treatment technology, temperature can directly affect the metabolism and reaction rate of microorganisms, including the degradation effect and treatment efficiency of sewage. In the existing sewage treatment system, the heating device generally needs additional energy supply, which will increase energy consumption and operating cost. On this basis, using solar energy, one of the important sources of renewable energy, can reduce operating cost and pollution, and has wide application prospect.

[0003] Traditional solar sewage treatment technology usually adopts solar heating method to convert solar energy into heat energy for heating sewage to provide suitable reaction temperature for subsequent sterilization and decomposition of organic matter. However, this single heating method has some limitations. For example, the single heating method cannot fully utilize the full-band sunlight in the solar spectrum, limiting the comprehensive utilization efficiency of energy. Photocatalysis technology is a technology that uses specific wavelength light to excite catalysts to produce active oxidants under light to degrade pollutants. However, photocatalysis technology also needs external light source support, which also increases energy consumption and operating cost.

[0004] Photocatalysis is a technology that uses light energy to promote chemical reactions. It usually involves using catalysts (such as semiconductor material titanium dioxide) to absorb light energy, thereby exciting chemical reactions, such as decomposition of pollutants. Photo-thermal effect refers to the phenomenon that light energy is absorbed and converted into heat energy. This effect can be achieved through suitable materials, such as materials with high light absorption rate, and through light concentration systems to increase light intensity.

[0005] Designing a multi-optical-path photo-thermal photocatalysis system requires precise optical design to ensure that light is properly focused and transmitted to the desired area. Multi-optical-path photo-thermal photocatalysis technology can significantly improve the degradation efficiency of pollutants. Through multi-stage light concentration and photo-thermal effect, highly selective pollutant removal can be achieved in a short time, which helps to improve water quality. The parameters of the multi-optical-path photo-thermal photocatalysis system can be easily controlled, including light intensity, temperature and reaction time. This controllability makes it suitable for different types of reactions and different application requirements. SUMMARY

[0006] The technical problem to be solved by the present application is:

[0007] In order to solve the problem that the traditional sewage treatment system cannot effectively utilize full-band sunlight by using single light and heat technology, and the photocatalytic technology can only utilize specific wavelength, and the utilization rate of solar energy is not high, the traditional energy is highly dependent, and the sewage treatment efficiency is low.

[0008] The technical scheme adopted by the present application to solve the above technical problems is:

[0009] The present application provides a light-concentrating frequency-division sewage treatment system based on multi-optical-path light-heat photocatalysis, comprising a light concentrator, an optical absorption filter, a heat receiver, a light collector, a reactor, a sewage shell path, a light-emitting tube, a heat exchanger, a circulating water pump, a sewage pump, a liquid adding valve, a liquid discharging valve, a flow regulating valve, a sewage inlet, a sewage outlet and a light guide pipe,

[0010] The heat medium outlet end of the heat receiver is connected with the heat medium inlet end of the circulating water pump, the heat medium outlet end of the circulating water pump is connected with the heat medium inlet end of the heat exchanger, the heat medium outlet end of the heat exchanger is connected with the heat medium inlet end of the flow regulating valve, and the heat medium outlet end of the flow regulating valve is connected with the heat medium inlet end of the heat receiver,

[0011] The sewage outlet end of the reactor is provided with a liquid discharging valve, the sewage inlet end of the reactor is connected with the sewage outlet end of the heat exchanger, the sewage inlet end of the reactor is connected with the sewage outlet end of the heat exchanger, the sewage inlet end of the reactor is connected with the sewage outlet end of the heat exchanger, and the sewage inlet end of the reactor is provided with a liquid adding valve,

[0012] At least one light concentrator is laid on a flat ground or plane facing the direction of sunlight, the receiving surface of the optical absorption filter is arranged on the focal line of the light concentrator, the optical absorption filter is surrounded by the outer surface of the heat receiver, the heat receiver is surrounded by the outer surface of the light collector, the light collector is connected with the reactor through the light guide pipe, the reactor comprises a sewage shell path and a light-emitting tube on the outer wall of the sewage shell path, the light-emitting tube comprises a plurality of light-emitting tube units connected in parallel, one end of each of the light-emitting tube units is connected with the light guide pipe, and the two ends of the sewage shell path are respectively connected with the heat exchanger and the sewage outlet end.

[0013] A light-concentrating frequency-division sewage treatment system based on multi-optical-path light-heat photocatalysis, comprising a light concentrator, an optical absorption filter, a heat receiver, a light collector, a reactor, a sewage shell path, a light-emitting tube, a heat exchanger, a circulating water pump, a sewage pump, a liquid adding valve, a liquid discharging valve, a flow regulating valve, a sewage inlet, a sewage outlet and a light guide pipe,

[0014] The heat receiver's heat medium outlet end is connected with the heat medium inlet end of the circulating water pump, the heat medium outlet end of the circulating water pump is connected with the heat medium inlet end of the heat exchanger, the heat medium outlet end of the heat exchanger is connected with the heat medium inlet end of the flow regulating valve, the heat medium outlet end of the flow regulating valve is connected with the heat medium inlet end of the heat receiver,

[0015] The reactor's sewage outlet end is provided with a liquid discharge valve, the reactor's sewage inlet end is connected with the heat exchanger's sewage outlet end, the heat exchanger's sewage inlet end is connected with the sewage pump's sewage outlet end, and the sewage pump's sewage inlet end is provided with a liquid addition valve,

[0016] At least one light collector is laid on a flat ground or plane facing the sunlight direction, the receiving surface of the optical absorption filter is arranged on the focal line of the light collector, the optical absorption filter is surrounded by the outer surface of the heat receiver, the heat receiver is surrounded by the outer surface of the light collector, the light collector is connected with the reactor through a light guide pipe, the reactor comprises a sewage shell and a light emitting pipe on the outer wall of the sewage shell, the light emitting pipe comprises a plurality of light emitting pipe groups, each light emitting pipe group comprises at least two parallel light emitting pipe units, the light guide pipe is connected with one end of each light emitting pipe group, and the two ends of the sewage shell are connected with the heat exchanger and the sewage outlet end respectively.

[0017] Further, the light guide pipe comprises a light guide pipe branch one and a light guide pipe branch two, the light guide pipe branch one is connected with the first light emitting pipe, and the light guide pipe branch two is connected with the second light emitting pipe.

[0018] A light collecting and frequency dividing sewage treatment system based on multi-optical-path photo-thermal photocatalysis, comprising a light collector, an optical absorption filter, a heat receiver, a light collector, a reactor, a sewage shell, a light emitting pipe, a heat exchanger, a circulating water pump, a sewage pump, a liquid addition valve, a liquid discharge valve, a flow regulating valve, a sewage inlet, a sewage outlet and a light guide pipe,

[0019] The heat medium outlet end of the heat receiver is connected with the heat medium inlet end of the circulating water pump, the heat medium outlet end of the circulating water pump is connected with the heat medium inlet end of the heat exchanger, the heat exchanger is arranged in the reactor, the heat medium outlet end of the heat exchanger is connected with the heat medium inlet end of the flow regulating valve, and the heat medium outlet end of the flow regulating valve is connected with the heat medium inlet end of the heat receiver,

[0020] The reactor's sewage outlet end is provided with a liquid discharge valve, the reactor's sewage inlet end is connected with the heat exchanger's sewage outlet end, the heat exchanger's sewage inlet end is connected with the sewage pump's sewage outlet end, and the sewage pump's sewage inlet end is provided with a liquid addition valve,

[0021] At least one light collector is laid on a flat ground or plane facing the direction of sunlight, a receiving surface of the optical absorption filter is arranged on a focal line of the light collector, the optical absorption filter is surrounded by an outer surface of a heat receiver, the heat receiver is surrounded by an outer surface of a light collector, the light collector is connected with a reactor through a light guide pipe, the reactor comprises a sewage shell and a light emitting tube on an outer wall of the sewage shell, the light emitting tube comprises a plurality of light emitting tube units connected in parallel, the light guide pipe is connected with one end of the plurality of light emitting tube units in parallel, and two ends of the sewage shell are connected with a heat exchanger and a sewage outlet respectively.

[0022] A light-concentrating frequency-division sewage treatment system based on multi-optical-path light-heat photocatalysis comprises a light collector, an optical absorption filter, a heat receiver, a light collector, a reactor, a sewage shell, a light emitting tube, a heat exchanger, a circulating water pump, a sewage pump, a liquid adding valve, a liquid discharging valve, a flow regulating valve, a sewage inlet, a sewage outlet and a light guide pipe,

[0023] A heat medium outlet end of the heat receiver is connected with a heat medium inlet end of the circulating water pump, a heat medium outlet end of the circulating water pump is connected with a heat medium inlet end of the heat exchanger, the heat exchanger is arranged in the reactor, a heat medium outlet end of the heat exchanger is connected with a heat medium inlet end of the flow regulating valve, and a heat medium outlet end of the flow regulating valve is connected with a heat medium inlet end of the heat receiver,

[0024] A liquid discharging valve is arranged at a sewage outlet end of the reactor, a sewage inlet end of the reactor is connected with a sewage outlet end of the sewage pump, and a sewage inlet end of the sewage pump is provided with a liquid adding valve,

[0025] At least one light collector is laid on a flat ground or plane facing the direction of sunlight, a receiving surface of the optical absorption filter is arranged on a focal line of the light collector, the optical absorption filter is surrounded by an outer surface of a heat receiver, the heat receiver is surrounded by an outer surface of a light collector, the light collector is connected with a reactor through a light guide pipe, the reactor comprises a sewage shell and a light emitting tube on an outer wall of the sewage shell, the light emitting tube comprises a plurality of light emitting tube units connected in parallel, the light guide pipe is connected with one end of the plurality of light emitting tube units in parallel, and two ends of the sewage shell are connected with a heat exchanger and a sewage outlet respectively.

[0026] Further, the light guide pipe comprises a light guide pipe branch one and a light guide pipe branch two, the light guide pipe branch one is connected with a first light emitting tube, and the light guide pipe branch two is connected with a second light emitting tube.

[0027] A light-concentrating frequency-dividing sewage treatment system based on multi-optical-path photo-thermal photocatalysis, comprising a light concentrator, an optical absorption filter, a heat receiver, a light collector, a reactor, a sewage shell, a light-emitting tube, a heat exchanger, a circulating water pump, a sewage pump, a liquid adding valve, a liquid discharging valve, a flow regulating valve, a sewage inlet, a sewage outlet and a light guide pipe,

[0028] The heat medium outlet end of the heat receiver is connected with the heat medium inlet end of the circulating water pump, the heat medium outlet end of the circulating water pump is connected with the heat medium inlet end of the heat exchanger, the heat medium outlet end of the heat exchanger is connected with the heat medium inlet end of the flow regulating valve, and the heat medium outlet end of the flow regulating valve is connected with the heat medium inlet end of the heat receiver.

[0029] The sewage outlet end of at least one reactor is provided with the liquid discharging valve, the sewage inlet end of at least one reactor is connected with the sewage outlet end of the heat exchanger, the sewage inlet end of the heat exchanger is connected with the outlet end of the first sewage pipeline, the inlet end of the first sewage pipeline is connected with the sewage outlet end of the sewage pump, and the sewage inlet end of the sewage pump is provided with the liquid adding valve.

[0030] The light concentrators are arranged on a flat ground or plane facing the sunlight direction, the receiving surface of the optical absorption filter is arranged on the focal line of the light concentrator, the optical absorption filter is surrounded by the outer surface of the heat receiver, the heat receiver is surrounded by the outer surface of the light collector, the light collector is connected with the reactor through the light guide pipe, the reactor comprises the sewage shell and the light-emitting tube in the sewage shell, one end of the light-emitting tube in each reactor is connected with the light guide pipe, and the two ends of the sewage shell in each reactor are connected with the heat exchanger and the sewage outlet end respectively.

[0031] Further, the light concentrator is a groove type light concentrator.

[0032] A treatment method of a light-concentrating frequency-dividing sewage treatment system based on multi-optical-path photo-thermal photocatalysis, comprising the following steps:

[0033] The circulating water pump, the sewage pump, the liquid adding valve, the liquid discharging valve and the flow regulating valve are opened, the angle of the light concentrator is adjusted according to the position and light propagation direction of the sun, the light concentrator reflects the sunlight onto the optical absorption filter, the ultraviolet light and the infrared-visible light are separated through the optical absorption filter, the ultraviolet light is reflected onto the light collector in the optical absorption filter, then is introduced into the reactor through the light guide pipe for sewage treatment, and the light of other wavelengths is absorbed by the optical absorption filter, then enters the heat receiver, and is circulated in the circulating water pump and the heat exchanger in turn.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] The application discloses a treatment method of a concentrated light frequency separation sewage treatment system based on multi-optical-path photo-thermal photocatalysis, which adjusts the angle of a light concentrator according to the position of the sun and the direction of light propagation, reflects sunlight to an optical absorption filter through the light concentrator, separates ultraviolet light and infrared-visible light through the optical absorption filter, reflects the ultraviolet light to a light collector in the optical absorption filter, and then guides the light into a reactor through a light guide pipe for sewage treatment; the light of other wavelengths is absorbed by the optical absorption filter and then enters a heat receiver, and is circulated in a circulating water pump and a heat exchanger in sequence.

[0036] The application discloses a treatment method of a concentrated light frequency separation sewage treatment system based on multi-optical-path photo-thermal photocatalysis, which concentrates sunlight into the system through a light concentrator, realizes efficient photo-thermal conversion through a light absorption filter device, realizes heat coupling through a heat exchanger, and further improves the energy utilization efficiency.

[0037] The application discloses a treatment method of a concentrated light frequency separation sewage treatment system based on multi-optical-path photo-thermal photocatalysis, which adopts a photocatalytic sewage treatment technology, can effectively degrade and remove organic pollutants and other pollutants in sewage through a photo-catalytic reaction, and can improve the efficiency of the photo-catalytic reaction by selectively absorbing light of specific wavelengths.

[0038] The application discloses a treatment method of a concentrated light frequency separation sewage treatment system based on multi-optical-path photo-thermal photocatalysis, which utilizes solar energy to perform photo-thermal combined catalysis sewage treatment, reduces the dependence on traditional energy, reduces carbon emissions and the use of chemical agents, is helpful for protecting the environment and saving energy, and can effectively reduce investment cost and maintenance cost.

[0039] The application discloses a treatment method of a concentrated light frequency separation sewage treatment system based on multi-optical-path photo-thermal photocatalysis, which effectively ensures uniform light distribution through the design of multiple optical paths, can ensure that light is more uniformly transmitted to sewage, thereby improving the catalytic effect, accelerating the degradation of organic matter, and improving the overall efficiency and performance of the system. When light passes through a medium, attenuation may occur, that is, the light intensity decreases. Ensuring that light and water are in sufficient contact can reduce the influence of light attenuation, so that light can be used more for catalytic reactions, which can improve the reaction efficiency, rate and effect while reducing energy consumption. The design of the multi-optical-path photo-thermal photocatalysis system requires precise optical design to ensure that light is correctly focused and transmitted to the required area. The multi-optical-path photo-thermal photocatalysis technology can significantly improve the degradation efficiency of pollutants. Through multi-stage light concentration and photo-thermal effects, highly selective pollutant removal can be realized in a short time, which is helpful for improving water quality. The parameters of the multi-optical-path photo-thermal photocatalysis system can be easily controlled, including light intensity, temperature and reaction time. This controllability makes it suitable for different types of reactions and different application requirements. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of a concentrated light frequency-dividing wastewater treatment system based on multi-path photothermal photocatalysis in an embodiment of the present invention. Figure 1 ;

[0041] Figure 2 This is a schematic diagram of the structure of a concentrated light frequency-dividing wastewater treatment system based on multi-path photothermal photocatalysis in an embodiment of the present invention. Figure 2 ;

[0042] Figure 3 This is a schematic diagram of the structure of a concentrated light frequency-dividing wastewater treatment system based on multi-path photothermal photocatalysis in an embodiment of the present invention. Figure 3 ;

[0043] Figure 4 This is a schematic diagram of the structure of a concentrated light frequency-dividing wastewater treatment system based on multi-path photothermal photocatalysis in an embodiment of the present invention. Figure 4 ;

[0044] Figure 5 This is a schematic diagram of the structure of a concentrated light frequency-dividing wastewater treatment system based on multi-path photothermal photocatalysis in an embodiment of the present invention. Figure 1 ;

[0045] The arrows in the diagram indicate the direction of light propagation or the direction of sewage flow.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Concentrator; 2. Optical absorption filter; 3. Heat receiver; 4. Light collector; 5. Reactor; 6. Wastewater shell side; 7. Light-emitting tube; 7-1. First light-emitting tube; 7-2. Second light-emitting tube; 8. Heat exchanger; 9. Circulating water pump; 10. Wastewater pump; 11. Liquid filling valve; 12. Liquid draining valve; 13. Flow regulating valve; 14. First heat transfer medium pipeline; 15. Second heat transfer medium pipeline; 16. Third heat transfer medium pipeline; 17. Fourth heat transfer medium pipeline; 18. Wastewater inlet; 19. First wastewater pipeline; 20. Second wastewater pipeline; 21. Wastewater outlet; 22. Light guide tube; 22-1. Light guide tube branch one; 22-2. Light guide tube branch two. Detailed Implementation

[0048] In the description of this invention, it should be noted that the terms used in the various embodiments, such as "upper," "lower," "front," "rear," "left," and "right," which indicate orientation, are only used to simplify the description of the positional relationships based on the accompanying drawings and do not mean that the components and devices referred to must be operated in accordance with the specific orientations and defined operations, methods, and structures in the specification. Such directional terms do not constitute a limitation of this invention.

[0049] In the description of the present application, it should be noted that the terms "first", "second", "third", "fourth" mentioned in the embodiments of the present application are only for the purpose of description and cannot be understood as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features defined with "first", "second", "third", "fourth" can be explicitly or implicitly included one or more of the features.

[0050] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0051] Specific embodiment one: combined Figure 2 As shown in the figure, the present application provides a light concentration frequency division sewage treatment system based on multi-optical path optical thermal photocatalysis, which comprises a light concentrator 1, an optical absorption filter 2, a heat receiver 3, a light collector 4, a reactor 5, a sewage shell path 6, a light emitting tube 7, a heat exchanger 8, a circulating water pump 9, a sewage pump 10, a liquid adding valve 11, a liquid discharging valve 12, a flow regulating valve 13, a first heat carrier medium pipeline 14, a second heat carrier medium pipeline 15, a third heat carrier medium pipeline 16, a fourth heat carrier medium pipeline 17, a sewage inlet 18, a first sewage pipeline 19, a second sewage pipeline 20, a sewage outlet 21 and a light guide pipe 22,

[0052] The heat carrier medium outlet end of the heat receiver 3 is connected with the inlet end of the first heat carrier medium pipeline 14, the outlet end of the first heat carrier medium pipeline 14 is connected with the heat carrier medium inlet end of the circulating water pump 9, the heat carrier medium outlet end of the circulating water pump 9 is connected with the inlet end of the second heat carrier medium pipeline 15, the outlet end of the second heat carrier medium pipeline 15 is connected with the heat carrier medium inlet end of the heat exchanger 8, the heat carrier medium outlet end of the heat exchanger 8 is connected with the inlet end of the third heat carrier medium pipeline 16, the outlet end of the third heat carrier medium pipeline 16 is connected with the heat carrier medium inlet end of the flow regulating valve 13, the heat carrier medium outlet end of the flow regulating valve 13 is connected with the inlet end of the fourth heat carrier medium pipeline 17, and the outlet end of the fourth heat carrier medium pipeline 17 is connected with the heat carrier medium inlet end of the heat receiver 3,

[0053] The liquid discharging valve 12 is arranged at the sewage outlet 21 end of the reactor 5, the sewage inlet end of the reactor 5 is connected with the outlet end of the second sewage pipeline 20, the inlet end of the second sewage pipeline 20 is connected with the sewage outlet end of the heat exchanger 8, the sewage inlet end of the heat exchanger 8 is connected with the outlet end of the first sewage pipeline 19, the inlet end of the first sewage pipeline 19 is connected with the sewage outlet end of the sewage pump 10, and the liquid adding valve 11 is arranged at the sewage inlet 18 end of the sewage pump 10,

[0054] At least one concentrator 1 is laid on the flat ground or plane facing the direction of sunlight, the receiving surface of the optical absorption filter 2 is arranged on the focal line of the concentrator 1, the optical absorption filter 2 is surrounded by the outer surface of the heat receiver 3, the heat receiver 3 is surrounded by the outer surface of the light collector 4, the light collector 4 is connected with the reactor 5 through the light guide pipe 22, the reactor 5 includes the sewage shell course 6 and the light emitting tube 7 on the outer wall of the sewage shell course 6, the light emitting tube 7 includes a plurality of light emitting tube units connected in parallel, the light guide pipe 22 is connected with one end of the plurality of light emitting tube units respectively, and the two ends of the sewage shell course 6 are respectively connected with the second sewage pipeline 20 and the sewage outlet 21.

[0055] The operation principle of the embodiment is as follows:

[0056] Solar energy concentration and frequency division process: the angle of the concentrator 1 can be adjusted according to the position of the sun and the direction of light propagation, so that the optimal angle with the sun is maintained to ensure that the light can always be accurately focused on the target area optical absorption filter 2. The light concentration process increases the energy flow density of sunlight, thereby improving the efficiency of the subsequent frequency division process. The optical absorption filter 2 separates ultraviolet light and infrared-visible light, which are used for photocatalysis and photothermal applications respectively. The optical absorption filter 2 allows the ultraviolet light to pass through and enter the light collector 4 arranged in the middle of the optical absorption filter 2, and the light of other wavelengths is absorbed by the optical absorption filter 2 into the heat receiver 3.

[0057] Photothermal utilization process: the working fluid absorbs the heat of the solar infrared-visible light part in the heat receiver 3, and then enters the circulating water pump 9 to increase the pressure. After being discharged from the circulating water pump 9, it enters the heat exchanger 8 to exchange heat with the sewage, and finally enters the heat receiver 3 to continue to absorb the heat of the solar infrared-visible light part, and repeats the cycle.

[0058] The photocatalytic process: the UV part of the light in the optical absorption filter 2 enters the reactor 5 through the light guide pipe, and in the reactor 5, the light exchange between the sewage in the shell 6 and the light pipe 7 is carried out, and the catalyst is excited by the energy of the UV part of the sunlight to excite the surface electrons, and the excited state electrons have high reaction activity and can participate in the catalytic reaction. The excited state of the catalyst surface electron and the pollutant or other reactant interact with each other, promote the reaction to occur. Under the action of the catalyst, the reaction rate is accelerated, and the harmful substances are degraded into relatively harmless products. The catalyst is fixed on the surface of the reactor or the light pipe to accelerate the chemical reaction. When the external light source irradiates the surface or the inside of the catalyst, the electrons in the catalyst are excited to the excited state. These excited state electrons are generated in the catalyst to form electron-hole pairs. Pollutants or reactants are usually dissolved in the solution in the reactor. These substances will be adsorbed on the surface of the catalyst. The adsorbed pollutant molecules are pulled close to the surface of the catalyst and interact with the excited state electron-hole pairs. Once the pollutant molecules interact with the excited state electron-hole pairs, the photocatalytic reaction begins. After the reaction products are generated, they can be desorbed from the surface of the catalyst or the carrier and released into the solution in the reactor. These products are usually more environmentally friendly substances, less harmful.

[0059] Reasons for energy saving and safety of the specific embodiment:

[0060] The embodiment uses solar energy as the main energy source, and sunlight is a free and renewable resource that does not require additional energy input. Compared with traditional wastewater treatment systems that rely on fossil fuels or electricity supply, solar energy utilization reduces energy costs.

[0061] Through the design of the optical absorption filter 2, the embodiment can efficiently utilize light energy and thermal energy, reducing energy loss. The optical absorption filter 2 can selectively transmit UV part of the sunlight for photocatalytic wastewater treatment, while converting the unselected spectrum into thermal energy, realizing the comprehensive utilization of multiple energy sources.

[0062] The heat exchanger 8 realizes the coupling of thermal energy, and transfers the thermal energy generated from the optical absorption filter 2 to the wastewater that needs to be heated or other purposes. Such thermal coupling technology can maximize the utilization of thermal energy, improving the energy utilization efficiency.

[0063] The embodiment adopts photocatalytic wastewater treatment technology, which does not require the use of a large amount of chemical agents compared with traditional wastewater treatment methods. This reduces the use of chemicals and the risks and hazards generated during the treatment process, reduces the contact and health risks of the operators, reduces the load and pollution to the environment, and makes the system run more environmentally friendly and safe.

[0064] The system adopts the combination of solar light heat and photocatalysis technology, does not need external energy supply, and can stably operate. The photocatalysis reaction is carried out at room temperature, compared with traditional thermal reaction or chemical reaction, the danger in operation is reduced.

[0065] In the sewage treatment system, the light and water are fully contacted through the multi-optical path design to enhance the photocatalysis effect. The photocatalysis is to activate the catalyst by using light energy to promote the degradation of harmful substances in sewage. The full contact of light and water can ensure that light is more uniformly transmitted to sewage, thereby improving the catalytic effect and accelerating the degradation of organic matter. Further, the reaction rate is improved. The full contact of light and water can shorten the light exposure time, so that the reaction proceeds more rapidly. When light passes through a medium (such as water), attenuation may occur, i.e. the light intensity decreases. The full contact of light and water through the multi-optical path can reduce the influence of light attenuation, so that light can be more used for catalytic reaction. It helps to ensure that pollutants in the entire reaction area can obtain sufficient light, avoiding local reaction rate too slow. It helps to improve the reaction efficiency, rate and effect, while reducing energy consumption.

[0066] In summary, the energy-saving and safe reasons of the present scheme are that solar energy is used as the main energy source, solar light heat conversion is efficiently used, a large amount of chemical reagents are not needed, high-temperature operation is not needed, stable operation and environmental friendliness are achieved, and the system has significant advantages in energy utilization and operation safety.

[0067] Specific implementation scheme two: combination Figure 3 As shown in the figure, the present application provides a light-concentrating frequency-dividing sewage treatment system based on multi-optical path light heat photocatalysis, which comprises a light concentrator 1, an optical absorption filter 2, a heat receiver 3, a light collector 4, a reactor 5, a sewage shell path 6, a first light-emitting tube 7-1, a second light-emitting tube 7-2, a heat exchanger 8, a circulating water pump 9, a sewage pump 10, a liquid adding valve 11, a liquid discharging valve 12, a flow regulating valve 13, a first heat carrier medium pipeline 14, a second heat carrier medium pipeline 15, a third heat carrier medium pipeline 16, a fourth heat carrier medium pipeline 17, a sewage inlet 18, a first sewage pipeline 19, a second sewage pipeline 20, a sewage outlet 21, a light guide pipe 22, a light guide pipe branch one 22-1 and a light guide pipe branch two 22-2,

[0068] The heat receiver 3 is connected with the first heat medium pipeline 14 at the outlet end of the heat medium, the outlet end of the first heat medium pipeline 14 is connected with the heat medium inlet end of the circulating water pump 9, the heat medium outlet end of the circulating water pump 9 is connected with the heat medium inlet end of the second heat medium pipeline 15, the heat medium outlet end of the second heat medium pipeline 15 is connected with the heat medium inlet end of the heat exchanger 8, the heat medium outlet end of the heat exchanger 8 is connected with the heat medium inlet end of the third heat medium pipeline 16, the heat medium outlet end of the third heat medium pipeline 16 is connected with the heat medium inlet end of the flow regulating valve 13, the heat medium outlet end of the flow regulating valve 13 is connected with the heat medium inlet end of the fourth heat medium pipeline 17, and the heat medium outlet end of the fourth heat medium pipeline 17 is connected with the heat medium inlet end of the heat receiver 3,

[0069] The reactor 5 is provided with the liquid discharge valve 12 at the outlet end of the sewage, the outlet end of the first sewage pipeline 19 is connected with the sewage inlet end of the heat exchanger 8, the sewage inlet end of the heat exchanger 8 is connected with the outlet end of the second sewage pipeline 20, and the outlet end of the second sewage pipeline 20 is connected with the sewage inlet end of the reactor 5,

[0070] At least one light collector 1 is laid on a flat ground or plane facing the direction of sunlight, the receiving surface of the optical absorption filter 2 is arranged on the focal line of the light collector 1, the optical absorption filter 2 is surrounded by the outer surface of the heat receiver 3, the heat receiver 3 is surrounded by the outer surface of the light collector 4, the light collector 4 is connected with the reactor 5 through the light guide pipe 22, the reactor 5 includes the sewage shell course 6 and the light emitting pipe 7 on the outer wall of the sewage shell course 6, the light emitting pipe 7 includes a plurality of groups of light emitting pipe groups, each group of light emitting pipe groups includes at least two parallel light emitting pipe units, the light guide pipe 22 is respectively connected with one end of the plurality of groups of light emitting pipe groups, and the two ends of the sewage shell course 6 are respectively connected with the second sewage pipeline 20 and the sewage outlet 21.

[0071] Preferably, the light guide pipe 22 includes the light guide pipe branch one 22-1 and the light guide pipe branch two 22-2, the light guide pipe branch one 22-1 is connected with the first light emitting pipe 7-1, and the light guide pipe branch two 22-2 is connected with the second light emitting pipe 7-2.

[0072] The operation principle and energy-saving safety reason of the embodiment are the same as those of the specific implementation scheme one.

[0073] Specific implementation scheme three: combination Figure 4As shown, the application provides a light-concentrating frequency-dividing sewage treatment system based on multi-optical-path optical-thermal photocatalysis, which comprises a light concentrator 1, an optical absorption filter 2, a heat receiver 3, a light collector 4, a reactor 5, a sewage shell path 6, a light-emitting tube 7, a heat exchanger 8, a circulating water pump 9, a sewage pump 10, a liquid adding valve 11, a liquid discharging valve 12, a flow regulating valve 13, a first heat carrier medium pipeline 14, a second heat carrier medium pipeline 15, a third heat carrier medium pipeline 16, a fourth heat carrier medium pipeline 17, a sewage inlet 18, a first sewage pipeline 19, a sewage outlet 21 and a light guide pipe 22,

[0074] The heat carrier medium outlet end of the heat receiver 3 is connected with the inlet end of the first heat carrier medium pipeline 14, the outlet end of the first heat carrier medium pipeline 14 is connected with the heat carrier medium inlet end of the circulating water pump 9, the heat carrier medium outlet end of the circulating water pump 9 is connected with the inlet end of the second heat carrier medium pipeline 15, the outlet end of the second heat carrier medium pipeline 15 is connected with the heat carrier medium inlet end of the heat exchanger 8, the heat exchanger 8 is arranged in the reactor 5, the heat carrier medium outlet end of the heat exchanger 8 is connected with the inlet end of the third heat carrier medium pipeline 16, the outlet end of the third heat carrier medium pipeline 16 is connected with the heat carrier medium inlet end of the flow regulating valve 13, the heat carrier medium outlet end of the flow regulating valve 13 is connected with the inlet end of the fourth heat carrier medium pipeline 17, and the outlet end of the fourth heat carrier medium pipeline 17 is connected with the heat carrier medium inlet end of the heat receiver 3,

[0075] The liquid discharging valve 12 is arranged at the sewage outlet end of the reactor 5, the sewage inlet end of the reactor 5 is connected with the outlet end of the first sewage pipeline 19, the inlet end of the first sewage pipeline 19 is connected with the sewage outlet end of the sewage pump 10, and the sewage inlet 18 end of the sewage pump 10 is provided with the liquid adding valve 11,

[0076] At least one light concentrator 1 is laid on a flat ground or plane facing the direction of sunlight, the receiving surface of the optical absorption filter 2 is arranged on the focal line of the light concentrator 1, the optical absorption filter 2 is surrounded by the outer surface of the heat receiver 3, the heat receiver 3 is surrounded by the outer surface of the light collector 4, the light collector 4 is connected with the reactor 5 through the light guide pipe 22, the reactor 5 comprises the sewage shell path 6 and the light-emitting tube 7 on the outer wall of the sewage shell path 6, the light-emitting tube 7 comprises a plurality of light-emitting tube units connected in parallel, the light guide pipe 22 is connected with one end of each of the plurality of light-emitting tube units, and the two ends of the sewage shell path 6 are respectively connected with the second sewage pipeline 20 and the sewage outlet 21.

[0077] The operation principle and energy-saving safety reason of the embodiment are consistent with those of the first or second specific implementation.

[0078] Specific implementation four: combination Figure 5As shown, the application provides a light-concentrating frequency-dividing sewage treatment system based on multi-optical-path optical-thermal photocatalysis, which comprises a light concentrator 1, an optical absorption filter 2, a heat receiver 3, a light collector 4, a reactor 5, a sewage shell path 6, a first light-emitting tube 7-1, a second light-emitting tube 7-2, a heat exchanger 8, a circulating water pump 9, a sewage pump 10, a liquid adding valve 11, a liquid discharging valve 12, a flow regulating valve 13, a first heat carrier medium pipeline 14, a second heat carrier medium pipeline 15, a third heat carrier medium pipeline 16, a fourth heat carrier medium pipeline 17, a sewage inlet 18, a first sewage pipeline 19, a sewage outlet 21, a light guide pipe 22, a light guide pipe branch 22-1 and a light guide pipe branch 22-2,

[0079] The heat carrier medium outlet end of the heat receiver 3 is connected with the inlet end of the first heat carrier medium pipeline 14, the outlet end of the first heat carrier medium pipeline 14 is connected with the heat carrier medium inlet end of the circulating water pump 9, the heat carrier medium outlet end of the circulating water pump 9 is connected with the inlet end of the second heat carrier medium pipeline 15, the outlet end of the second heat carrier medium pipeline 15 is connected with the heat carrier medium inlet end of the heat exchanger 8, the heat exchanger 8 is arranged in the reactor 5, the heat carrier medium outlet end of the heat exchanger 8 is connected with the inlet end of the third heat carrier medium pipeline 16, the outlet end of the third heat carrier medium pipeline 16 is connected with the heat carrier medium inlet end of the flow regulating valve 13, the heat carrier medium outlet end of the flow regulating valve 13 is connected with the inlet end of the fourth heat carrier medium pipeline 17, and the outlet end of the fourth heat carrier medium pipeline 17 is connected with the heat carrier medium inlet end of the heat receiver 3,

[0080] The liquid discharging valve 12 is arranged at the sewage outlet end of the reactor 5, the sewage inlet end of the reactor 5 is connected with the outlet end of the first sewage pipeline 19, the inlet end of the first sewage pipeline 19 is connected with the sewage outlet end of the sewage pump 10, and the sewage inlet 18 end of the sewage pump 10 is provided with the liquid adding valve 11,

[0081] At least one light concentrator 1 is laid on a flat ground or plane facing the direction of sunlight, the receiving surface of the optical absorption filter 2 is arranged on the focal line of the light concentrator 1, the optical absorption filter 2 is surrounded by the outer surface of the heat receiver 3, the heat receiver 3 is surrounded by the outer surface of the light collector 4, the light collector 4 is connected with the reactor 5 through the light guide pipe 22, the reactor 5 comprises the sewage shell path 6 and the light-emitting tube 7 on the outer wall of the sewage shell path 6, the light-emitting tube comprises a plurality of groups of light-emitting tube groups, each group of light-emitting tube groups comprises at least two parallel light-emitting tube units, the light guide pipe 22 is respectively connected with one end of the plurality of groups of light-emitting tube groups, and the two ends of the sewage shell path 6 are respectively connected with the second sewage pipeline 20 and the sewage outlet 21.

[0082] Preferably, the light guide pipe 22 comprises a light guide pipe branch one 22-1 and a light guide pipe branch two 22-2, the light guide pipe branch one 22-1 is connected with the first light emitting tube 7-1, and the light guide pipe branch two 22-2 is connected with the second light emitting tube 7-2.

[0083] The operation principle and energy saving safety reason of the embodiment are consistent with the specific implementation schemes one, two or three.

[0084] Specific implementation scheme five: combination ​ As shown, the application provides a light condensing frequency separation sewage treatment system based on multi-optical path optical thermal photocatalysis, which comprises a light condenser 1, an optical absorption filter 2, a heat receiver 3, a light collector 4, a reactor 5, a sewage shell path 6, a light emitting tube 7, a heat exchanger 8, a circulating water pump 9, a sewage pump 10, a liquid adding valve 11, a liquid discharging valve 12, a flow regulating valve 13, a first heat carrier medium pipeline 14, a second heat carrier medium pipeline 15, a third heat carrier medium pipeline 16, a fourth heat carrier medium pipeline 17, a sewage inlet 18, a first sewage pipeline 19, a second sewage pipeline 20, a sewage outlet 21 and a light guide pipe 22,

[0085] The heat carrier medium outlet end of the heat receiver 3 is connected with the inlet end of the first heat carrier medium pipeline 14, the outlet end of the first heat carrier medium pipeline 14 is connected with the heat carrier medium inlet end of the circulating water pump 9, the heat carrier medium outlet end of the circulating water pump 9 is connected with the inlet end of the second heat carrier medium pipeline 15, the outlet end of the second heat carrier medium pipeline 15 is connected with the heat carrier medium inlet end of the heat exchanger 8, the heat carrier medium outlet end of the heat exchanger 8 is connected with the inlet end of the third heat carrier medium pipeline 16, the outlet end of the third heat carrier medium pipeline 16 is connected with the heat carrier medium inlet end of the flow regulating valve 13, the heat carrier medium outlet end of the flow regulating valve 13 is connected with the inlet end of the fourth heat carrier medium pipeline 17, and the outlet end of the fourth heat carrier medium pipeline 17 is connected with the heat carrier medium inlet end of the heat receiver 3,

[0086] The liquid discharging valve 12 is arranged at the sewage outlet 21 end of at least one reactor 5, the sewage inlet end of at least one reactor 5 is connected with the outlet end of the second sewage pipeline 20, the inlet end of the second sewage pipeline 20 is connected with the sewage outlet end of the heat exchanger 8, the sewage inlet end of the heat exchanger 8 is connected with the outlet end of the first sewage pipeline 19, the inlet end of the first sewage pipeline 19 is connected with the sewage outlet end of the sewage pump 10, and the liquid adding valve 11 is arranged at the sewage inlet 18 end of the sewage pump 10,

[0087] Several light collectors 1 are laid on the flat ground or plane facing the sunlight direction, the receiving surface of the optical absorption filter 2 is arranged on the focal line of the light collector 1, the optical absorption filter 2 is surrounded by the outer surface of the heat receiver 3, the heat receiver 3 is surrounded by the outer surface of the light collector 4, the light collector 4 is connected with at least one reactor 5 through the light guide pipe 22, the reactor 5 comprises the sewage shell course 6 and the light emitting pipe 7 in the sewage shell course 6, the light guide pipe 22 is connected with one end of the light emitting pipe 7 in each reactor 5 respectively, and two ends of the sewage shell course 6 in each reactor 5 are connected with the second sewage pipeline 20 and the sewage outlet 21 respectively.

[0088] The operation principle and energy-saving safety reason of the embodiment are consistent with the first, second, third or fourth specific implementation scheme.

[0089] Preferably, the light collector 1 is a trough type light collector.

[0090] Although the present application is disclosed as above, the protection scope of the present application is not limited to this. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications shall fall within the protection scope of the present application.

Claims

1. A concentrated light frequency-division wastewater treatment system based on multi-path photothermal photocatalysis, characterized in that: It includes a concentrator (1), an optical absorption filter (2), a heat receiver (3), a light collector (4), a reactor (5), a wastewater shell side (6), a light-emitting tube (7), a heat exchanger (8), a circulating water pump (9), a wastewater pump (10), a liquid filling valve (11), a liquid draining valve (12), a flow regulating valve (13), a wastewater inlet (18), a wastewater outlet (21), and a light guide tube (22). The heat transfer medium outlet of the heat receiver (3) is connected to the heat transfer medium inlet of the circulating water pump (9), the heat transfer medium outlet of the circulating water pump (9) is connected to the heat transfer medium inlet of the heat exchanger (8), the heat transfer medium outlet of the heat exchanger (8) is connected to the heat transfer medium inlet of the flow regulating valve (13), and the heat transfer medium outlet of the flow regulating valve (13) is connected to the heat transfer medium inlet of the heat receiver (3). A discharge valve (12) is provided at the sewage outlet (21) end of the reactor (5), the sewage inlet end of the reactor (5) is connected to the sewage outlet end of the heat exchanger (8), the sewage inlet end of the heat exchanger (8) is connected to the sewage outlet end of the sewage pump (10), and a liquid filling valve (11) is provided at the sewage inlet (18) end of the sewage pump (10). At least one concentrator (1) is laid on a flat ground or plane facing the sunlight. The receiving surface of the optical absorption filter (2) is set on the focal line of the concentrator (1). The optical absorption filter (2) surrounds the outer surface of the heat receiver (3). The heat receiver (3) surrounds the outer surface of the light collector. The light collector (4) is connected to the reactor (5) through a light guide tube (22). The reactor (5) includes a sewage shell side (6) and light-emitting tubes (7) inside the sewage shell side (6). The light-emitting tubes (7) include a number of light-emitting tube (7) units connected in parallel in sequence. The light guide tube (22) is connected to one end of the number of light-emitting tube (7) units connected in parallel. The two ends of the sewage shell side (6) are connected to the heat exchanger (8) and the sewage outlet (21) end, respectively. The solution is as follows: Turn on the circulating water pump (9), sewage pump (10), liquid addition valve (11), liquid discharge valve (12) and flow regulating valve (13). Adjust the angle of the concentrator (1) according to the position of the sun and the direction of light propagation. The concentrator (1) reflects the sunlight onto the optical absorption filter (2). The optical absorption filter (2) separates the ultraviolet light and infrared-visible light. The ultraviolet light is reflected onto the light collector (4) inside the optical absorption filter (2) and then introduced into the reactor (5) through the light guide tube (22) for sewage treatment. The light of the remaining wavelengths is absorbed by the optical absorption filter (2) and enters the heat receiver (3), and then circulates sequentially in the circulating water pump (9) and the heat exchanger (8).

2. A concentrated light frequency-division wastewater treatment system based on multi-path photothermal photocatalysis, characterized in that: It includes a concentrator (1), an optical absorption filter (2), a heat receiver (3), a light collector (4), a reactor (5), a wastewater shell side (6), a light-emitting tube (7), a heat exchanger (8), a circulating water pump (9), a wastewater pump (10), a liquid filling valve (11), a liquid draining valve (12), a flow regulating valve (13), a wastewater inlet (18), a wastewater outlet (21), and a light guide tube (22). The heat transfer medium outlet of the heat receiver (3) is connected to the heat transfer medium inlet of the circulating water pump (9), the heat transfer medium outlet of the circulating water pump (9) is connected to the heat transfer medium inlet of the heat exchanger (8), the heat transfer medium outlet of the heat exchanger (8) is connected to the heat transfer medium inlet of the flow regulating valve (13), and the heat transfer medium outlet of the flow regulating valve (13) is connected to the heat transfer medium inlet of the heat receiver (3). A discharge valve (12) is provided at the sewage outlet (21) end of the reactor (5), the sewage inlet end of the reactor (5) is connected to the sewage outlet end of the heat exchanger (8), the sewage inlet end of the heat exchanger (8) is connected to the sewage outlet end of the sewage pump (10), and a liquid filling valve (11) is provided at the sewage inlet (18) end of the sewage pump (10). At least one concentrator (1) is laid on a flat ground or plane facing the sunlight. The receiving surface of the optical absorption filter (2) is set on the focal line of the concentrator (1). The optical absorption filter (2) surrounds the outer surface of the heat receiver (3). The heat receiver (3) surrounds the outer surface of the light collector. The light collector (4) is connected to the reactor (5) through a light guide tube (22). The reactor (5) includes a sewage shell side (6) and light-emitting tubes (7) inside the sewage shell side (6). The light-emitting tubes (7) include several groups of light-emitting tubes (7). Each group of light-emitting tubes (7) includes at least two parallel light-emitting tube (7) units. The light guide tube (22) is connected to one end of several groups of light-emitting tubes (7). The two ends of the sewage shell side (6) are connected to the heat exchanger (8) and the sewage outlet (21) end, respectively. The solution is as follows: Turn on the circulating water pump (9), sewage pump (10), liquid addition valve (11), liquid discharge valve (12) and flow regulating valve (13). Adjust the angle of the concentrator (1) according to the position of the sun and the direction of light propagation. The concentrator (1) reflects the sunlight onto the optical absorption filter (2). The optical absorption filter (2) separates the ultraviolet light and infrared-visible light. The ultraviolet light is reflected onto the light collector (4) inside the optical absorption filter (2) and then introduced into the reactor (5) through the light guide tube (22) for sewage treatment. The light of the remaining wavelengths is absorbed by the optical absorption filter (2) and enters the heat receiver (3), and then circulates sequentially in the circulating water pump (9) and the heat exchanger (8).

3. The concentrated light frequency-dividing wastewater treatment system based on multi-path photothermal photocatalysis according to claim 2, characterized in that: The light guide tube (22) includes a light guide tube branch one (22-1) and a light guide tube branch two (22-2). The light guide tube branch one (22-1) is connected to the first light-emitting tube (7-1), and the light guide tube branch two (22-2) is connected to the second light-emitting tube (7-2).

4. A concentrated light frequency-dividing wastewater treatment system based on multi-path photothermal photocatalysis, characterized in that: It includes a concentrator (1), an optical absorption filter (2), a heat receiver (3), a light collector (4), a reactor (5), a wastewater shell side (6), a light-emitting tube (7), a heat exchanger (8), a circulating water pump (9), a wastewater pump (10), a liquid filling valve (11), a liquid draining valve (12), a flow regulating valve (13), a wastewater inlet (18), a wastewater outlet (21), and a light guide tube (22). The heat transfer medium outlet of the heat receiver (3) is connected to the heat transfer medium inlet of the circulating water pump (9), and the heat transfer medium outlet of the circulating water pump (9) is connected to the heat transfer medium inlet of the heat exchanger (8). The heat exchanger (8) is located in the reactor (5), and the heat transfer medium outlet of the heat exchanger (8) is connected to the heat transfer medium inlet of the flow regulating valve (13). The heat transfer medium outlet of the flow regulating valve (13) is connected to the heat transfer medium inlet of the heat receiver (3). The reactor (5) is provided with a discharge valve (12) at the sewage outlet (21) end, the sewage inlet end of the reactor (5) is connected to the sewage outlet end of the sewage pump (10), and the sewage inlet (18) end of the sewage pump (10) is provided with a liquid filling valve (11). At least one concentrator (1) is laid on a flat ground or plane facing the sunlight. The receiving surface of the optical absorption filter (2) is set on the focal line of the concentrator (1). The optical absorption filter (2) surrounds the outer surface of the heat receiver (3). The heat receiver (3) surrounds the outer surface of the light collector. The light collector (4) is connected to the reactor (5) through a light guide tube (22). The reactor (5) includes a sewage shell side (6) and light-emitting tubes (7) inside the sewage shell side (6). The light-emitting tubes (7) include a number of light-emitting tube (7) units connected in parallel in sequence. The light guide tube (22) is connected to one end of the number of light-emitting tube (7) units connected in parallel. The two ends of the sewage shell side (6) are connected to the heat exchanger (8) and the sewage outlet (21) end, respectively. The solution is as follows: Turn on the circulating water pump (9), sewage pump (10), liquid addition valve (11), liquid discharge valve (12) and flow regulating valve (13). Adjust the angle of the concentrator (1) according to the position of the sun and the direction of light propagation. The concentrator (1) reflects the sunlight onto the optical absorption filter (2). The optical absorption filter (2) separates the ultraviolet light and infrared-visible light. The ultraviolet light is reflected onto the light collector (4) inside the optical absorption filter (2) and then introduced into the reactor (5) through the light guide tube (22) for sewage treatment. The light of the remaining wavelengths is absorbed by the optical absorption filter (2) and enters the heat receiver (3), and then circulates sequentially in the circulating water pump (9) and the heat exchanger (8).

5. A concentrated light frequency-division wastewater treatment system based on multi-path photothermal photocatalysis, characterized in that: It includes a concentrator (1), an optical absorption filter (2), a heat receiver (3), a light collector (4), a reactor (5), a wastewater shell side (6), a light-emitting tube (7), a heat exchanger (8), a circulating water pump (9), a wastewater pump (10), a liquid filling valve (11), a liquid draining valve (12), a flow regulating valve (13), a wastewater inlet (18), a wastewater outlet (21), and a light guide tube (22). The heat transfer medium outlet of the heat receiver (3) is connected to the heat transfer medium inlet of the circulating water pump (9), and the heat transfer medium outlet of the circulating water pump (9) is connected to the heat transfer medium inlet of the heat exchanger (8). The heat exchanger (8) is located in the reactor (5), and the heat transfer medium outlet of the heat exchanger (8) is connected to the heat transfer medium inlet of the flow regulating valve (13). The heat transfer medium outlet of the flow regulating valve (13) is connected to the heat transfer medium inlet of the heat receiver (3). The reactor (5) is provided with a discharge valve (12) at the sewage outlet (21) end, the sewage inlet end of the reactor (5) is connected to the sewage outlet end of the sewage pump (10), and the sewage inlet (18) end of the sewage pump (10) is provided with a liquid filling valve (11). At least one concentrator (1) is laid on a flat ground or plane facing the sunlight. The receiving surface of the optical absorption filter (2) is set on the focal line of the concentrator (1). The optical absorption filter (2) surrounds the outer surface of the heat receiver (3). The heat receiver (3) surrounds the outer surface of the light collector. The light collector (4) is connected to the reactor (5) through a light guide tube (22). The reactor (5) includes a sewage shell side (6) and light-emitting tubes (7) inside the sewage shell side (6). The light-emitting tubes (7) include several groups of light-emitting tubes (7). Each group of light-emitting tubes (7) includes at least two parallel light-emitting tube (7) units. The light guide tube (22) is connected to one end of several groups of light-emitting tubes (7). The two ends of the sewage shell side (6) are connected to the heat exchanger (8) and the sewage outlet (21) end, respectively. The solution is as follows: Turn on the circulating water pump (9), sewage pump (10), liquid addition valve (11), liquid discharge valve (12) and flow regulating valve (13). Adjust the angle of the concentrator (1) according to the position of the sun and the direction of light propagation. The concentrator (1) reflects the sunlight onto the optical absorption filter (2). The optical absorption filter (2) separates the ultraviolet light and infrared-visible light. The ultraviolet light is reflected onto the light collector (4) inside the optical absorption filter (2) and then introduced into the reactor (5) through the light guide tube (22) for sewage treatment. The light of the remaining wavelengths is absorbed by the optical absorption filter (2) and enters the heat receiver (3), and then circulates sequentially in the circulating water pump (9) and the heat exchanger (8).

6. A concentrated light frequency-dividing wastewater treatment system based on multi-path photothermal photocatalysis according to claim 5, characterized in that: The light guide tube (22) includes a light guide tube branch one (22-1) and a light guide tube branch two (22-2). The light guide tube branch one (22-1) is connected to the first light-emitting tube (7-1), and the light guide tube branch two (22-2) is connected to the second light-emitting tube (7-2).

7. A concentrated light frequency-division wastewater treatment system based on multi-path photothermal photocatalysis, characterized in that: It includes a concentrator (1), an optical absorption filter (2), a heat receiver (3), a light collector (4), a reactor (5), a wastewater shell side (6), a light-emitting tube (7), a heat exchanger (8), a circulating water pump (9), a wastewater pump (10), a liquid filling valve (11), a liquid draining valve (12), a flow regulating valve (13), a wastewater inlet (18), a wastewater outlet (21), and a light guide tube (22). The heat transfer medium outlet of the heat receiver (3) is connected to the heat transfer medium inlet of the circulating water pump (9), the heat transfer medium outlet of the circulating water pump (9) is connected to the heat transfer medium inlet of the heat exchanger (8), the heat transfer medium outlet of the heat exchanger (8) is connected to the heat transfer medium inlet of the flow regulating valve (13), and the heat transfer medium outlet of the flow regulating valve (13) is connected to the heat transfer medium inlet of the heat receiver (3). At least one reactor (5) has a wastewater outlet (21) end equipped with a drain valve (12), at least one reactor (5) has a wastewater inlet end connected to a heat exchanger (8) wastewater outlet end, the heat exchanger (8) wastewater inlet end is connected to a first wastewater pipeline (19) outlet end, the first wastewater pipeline (19) inlet end is connected to a wastewater pump (10) wastewater outlet end, and the wastewater pump (10) has a drain valve (11) at its wastewater inlet (18) end. Several concentrators (1) are laid on a flat ground or plane facing the sunlight. The receiving surface of the optical absorption filter (2) is set on the focal line of the concentrator (1). The optical absorption filter (2) surrounds the outer surface of the heat receiver (3). The heat receiver (3) surrounds the outer surface of the light collector. The light collector (4) is connected to at least one reactor (5) through a light guide tube (22). The reactor (5) includes a sewage shell side (6) and a light-emitting tube (7) in the sewage shell side (6). The light guide tube (22) is connected to one end of the light-emitting tube (7) in each reactor (5). The two ends of the sewage shell side (6) in each reactor (5) are connected to the heat exchanger (8) and the sewage outlet (21) respectively. The solution is as follows: Turn on the circulating water pump (9), sewage pump (10), liquid addition valve (11), liquid discharge valve (12) and flow regulating valve (13). Adjust the angle of the concentrator (1) according to the position of the sun and the direction of light propagation. The concentrator (1) reflects the sunlight onto the optical absorption filter (2). The optical absorption filter (2) separates the ultraviolet light and infrared-visible light. The ultraviolet light is reflected onto the light collector (4) inside the optical absorption filter (2) and then introduced into the reactor (5) through the light guide tube (22) for sewage treatment. The light of the remaining wavelengths is absorbed by the optical absorption filter (2) and enters the heat receiver (3), and then circulates sequentially in the circulating water pump (9) and the heat exchanger (8).

8. A concentrated light frequency-dividing wastewater treatment system based on multi-path photothermal photocatalysis according to any one of claims 1-7, characterized in that: The concentrator (1) is a trough-type concentrator (1).

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