A photocatalyst degradation performance detection system and method

Abstract

The present invention relates to the field of photocatalyst detection technology, and specifically to a photocatalyst degradation performance detection system and method, the system comprising a detection unit, the detection unit being provided with an inlet and an outlet, the outlet and the inlet of the detection unit being provided with a pollutant concentration detection module, the pollutant concentration detection module being used to detect the concentration of pollutants passing through; and also comprising a processing module, the processing module being used to obtain and record pollutant concentration data detected by the pollutant concentration detection module, control the operation of an ultraviolet light source component, a driving component and a temperature control component, and calculate the pollutant degradation performance of the photocatalyst under multiple groups of different lighting conditions and different detection environment temperature conditions. The present invention can synchronously obtain the pollutant degradation performance results of multiple groups of photocatalysts under different lighting conditions and different detection environment temperature conditions. The convenience of photocatalyst degradation performance detection and the efficiency of photocatalyst degradation performance detection are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photocatalyst detection, and in particular to a photocatalyst degradation performance detection system and method. Background Art

[0002] Photocatalysts are substances that can use light energy to catalyze chemical reactions. They are usually semiconductor materials with special structures and compositions on their surfaces that can absorb light energy under illumination and convert it into chemical energy. This chemical energy can be used to promote a series of important chemical reactions, including the decomposition of water, the oxidation and reduction of organic matter, and the degradation of air pollutants. Photocatalysts have the advantages of being clean, sustainable, efficient, and low-cost, and are widely used in environmental protection, energy conversion, and organic synthesis.

[0003] The performance of photocatalysts is usually tested through photocatalytic degradation experiments, which involves contacting photocatalysts with air pollutants or simulated wastewater and observing the degradation of target pollutants under ultraviolet or visible light. The performance of photocatalysts is evaluated by monitoring changes in pollutant concentrations in air and wastewater, changes in chemical redox indicators, and degradation products. During the testing process, since pollutants may cause harm to the environment and human body, the contact environment between photocatalysts and pollutants is usually closed, which brings inconvenience to the regulation of parameters such as light and temperature that affect the effect of photocatalysts. It is necessary to repeat the experiment many times to obtain the performance of photocatalysts under different light, temperature and other parameters.

[0004] Therefore, there is an urgent need for a photocatalyst degradation performance detection system and method that can conveniently control parameters such as light and temperature to improve the convenience and efficiency of photocatalyst degradation performance detection. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a photocatalyst degradation performance detection system and method, which are used to improve the convenience and efficiency of photocatalyst degradation performance detection.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] On the one hand, a photocatalyst degradation performance detection system is provided, comprising a detection unit, the detection unit is provided with an inlet and an outlet, the outlet and the inlet of the detection unit are both provided with a pollutant concentration detection module, the pollutant concentration detection module is used to detect the concentration of pollutants passing through;

[0008] The detection unit comprises a main shell, a sub-shell is arranged inside the main shell, the sub-shell is connected with the inlet and the outlet, the sub-shell has at least two side walls made of light-transmitting materials, a dimming component is arranged inside the sub-shell, and a mounting area for accommodating the photocatalyst to be detected is arranged on the dimming component, a temperature control component for adjusting the detection environment temperature and a driving component for driving the dimming component to operate are arranged inside the main shell, and an ultraviolet light source component is arranged on the inner side wall of the main shell corresponding to the light-transmitting side wall;

[0009] It also includes a processing module, which is used to obtain and record the pollutant concentration data detected by the pollutant concentration detection module, and detect the validity of the pollutant concentration data. After obtaining and recording the valid pollutant concentration data, the processing module controls the operation of the ultraviolet light source component, the driving component and the temperature control component, and calculates the pollutant degradation performance of the photocatalyst under multiple groups of different lighting conditions and different detection environment temperature conditions.

[0010] Furthermore, the pollutant concentration detection module includes a collimated laser light source arranged on the side walls of the inlet and outlet, a photoelectric receiver arranged on the side walls of the collimated laser light source opposite to the inlet and outlet, and a signal processing circuit. The photoelectric receiver is used to receive the laser signal after being scattered by the pollutant and convert the laser signal into an electrical signal. The signal processing circuit is used to process the electrical signal and output the pollutant concentration.

[0011] Furthermore, the processing module is connected to the signal processing circuit signal, and the processing module is used to obtain the pollutant concentration data within a preset unit time, and compare the pollutant concentration data within each unit time. When the difference between the pollutant concentration data within each unit time is lower than a threshold value, the pollutant concentration data within the preset unit time is determined to be valid.

[0012] Furthermore, the temperature control component includes a hot and cold control plate and a temperature sensor fixedly connected to the inner wall of the main shell. Both the hot and cold control plate and the temperature sensor are signal-connected to the processing module. The processing module is used to control the operation of the hot and cold control plate based on the temperature data collected by the temperature sensor.

[0013] Furthermore, the ultraviolet light source assembly includes a light source board, on which a plurality of ultraviolet lamps are arranged in an array, and the ultraviolet lamps can be turned on and off independently, and the area of ​​the light source board is not smaller than the corresponding light-transmitting side wall.

[0014] Furthermore, the dimming component includes at least two light-transmitting plates which are slidably connected to the side walls of the auxiliary shell and are made of light-transmitting material. A plurality of pyramids are arranged in an array on the opposite surfaces of the two light-transmitting plates. The bottom surfaces of the pyramids are fixedly connected to the surfaces of the light-transmitting plates, and the pyramids on the surfaces of the two light-transmitting plates are arranged alternately. A plurality of installation areas and reflective layers are provided on the surfaces of the pyramids, and the installation areas and reflective layers located on the same surface of the pyramids are arranged alternately.

[0015] Furthermore, the light-transmitting side wall, the light source plate and the light-transmitting plate are parallel to each other.

[0016] Furthermore, the angle between the bottom surface of the pyramid and the side surface of the pyramid is 30-60 degrees.

[0017] Furthermore, the driving assembly includes a magnetic part fixedly connected to the side wall of the light-transmitting plate, a driving plate is slidably connected between the main shell and the sub-shell at corresponding positions of the side wall of the light-transmitting plate, an electromagnet is fixedly connected to the side of the driving plate close to the side wall of the light-transmitting plate, a driving part is arranged between the main shell and the sub-shell, the output shaft of the driving part is coaxially fixedly connected to a lead screw, the nut of the lead screw is fixedly connected to the driving plate, and the driving part and the electromagnet are connected to the signal of the processing module.

[0018] On the other hand, a method for detecting photocatalyst degradation performance is provided, characterized in that it is carried out based on the photocatalyst degradation performance detection system according to any one of claims 1 to 9, and comprises the following steps:

[0019] The pollutants are introduced into the inlet, and the concentration of the pollutants introduced into the inlet is detected by the pollutant concentration detection module;

[0020] The pollutants are allowed to pass through the main housing into the auxiliary housing, and then pass through the installation area containing the photocatalyst in sequence, while the ultraviolet light source assembly irradiates the photocatalyst, thereby degrading the pollutants passing through;

[0021] When the pollutants are discharged from the outlet, the concentration of the pollutants discharged from the outlet is detected by the pollutant concentration detection module;

[0022] The processing module obtains and records the pollutant concentration data detected by the pollutant concentration detection module, and detects the validity of the pollutant concentration data. After obtaining and recording the valid pollutant concentration data, the driving component and the temperature control component are controlled to operate;

[0023] The driving component drives the dimming component to operate to adjust the lighting conditions of the photocatalyst; the temperature of the detection environment is adjusted by the temperature control component;

[0024] Repeat the above steps to obtain and record the concentration changes of pollutants before and after degradation under multiple groups of different lighting conditions and different detection ambient temperature conditions, and calculate the corresponding photocatalyst degradation performance.

[0025] The above scheme has the following beneficial effects:

[0026] 1. The present invention generally adopts a method of fixing the pollutant concentration detection module and adjusting the pollutant degradation area (lighting conditions and temperature conditions) to detect the photocatalyst degradation performance, and the ultraviolet light source component also remains fixed during the entire detection process. Compared with the prior art, the adjustment process of the lighting conditions and temperature conditions is optimized, so that the pollutant degradation performance of the photocatalyst under different lighting conditions and different detection environment temperature conditions can be continuously detected online, and the pollutant degradation performance results of multiple groups of photocatalysts under different lighting conditions and different detection environment temperature conditions can be obtained simultaneously. The convenience of photocatalyst degradation performance detection and the efficiency of photocatalyst degradation performance detection are improved.

[0027] 2. In the present invention, in terms of the photocatalyst performance results, the pollutant concentration detection module obtains the pollutant concentration data within a preset unit time and verifies the validity of the pollutant concentration data to ensure that the pollutant concentration data used can be used for accurate evaluation of the degradation performance of the photocatalyst. Compared with the prior art, more effective pollutant concentration data is obtained as the basis for evaluating the degradation performance of the photocatalyst, which improves the accuracy of the photocatalyst performance detection.

[0028] 3. In the present invention, in terms of optimizing the illumination condition adjustment process, the reflective layer disposed on the surface of the pyramid reflects the ultraviolet light emitted by the ultraviolet light source. Since the photocatalyst in the installation area can receive ultraviolet light in the relative direction in the initial state, the illumination intensity received by the photocatalyst is the basic value. When the ultraviolet light facing away from the photocatalyst is reflected to the surface of the photocatalyst, the illumination intensity received by the photocatalyst increases, thereby achieving the adjustment of the illumination intensity and detecting the degradation performance of the photocatalyst under different illumination conditions. Compared with adjusting the position of the ultraviolet light source or the setting position of the photocatalyst, the illumination conditions during the detection of the degradation performance of the photocatalyst can be conveniently adjusted, and the degradation performance results of multiple groups of photocatalysts on pollutants can be continuously detected online.

[0029] 4. In the present invention, the photocatalyst installation area and the reflective layer are staggered on the same surface of the pyramid, and the pyramids on the surfaces of the two light-transmitting plates are staggered. The area of ​​ultraviolet light reflected by the reflective layer to the relative photocatalyst installation area is proportional to the staggered position between the pyramids within a certain range, so that the adjustment of light intensity can be controlled, and the degradation performance results of the corresponding photocatalysts on pollutants under multiple sets of lighting conditions are obtained.

[0030] 5. The present invention can obtain the degradation performance results of multiple groups of photocatalysts on pollutants when the reflective layer is in different positions, extract the best ultraviolet light irradiation position, and provide the best ultraviolet light setting position reference based on the best lighting conditions and temperature conditions when the photocatalyst is actually used.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the system structure of an embodiment of the present invention;

[0033] Figure 2 This is a circuit diagram of a pollutant concentration detection module according to an embodiment of the present invention;

[0034] Figure 3 It is an axonometric diagram of a detection unit according to an embodiment of the present invention;

[0035] Figure 4 A top view of a detection unit according to an embodiment of the present invention;

[0036] Figure 5 for Figure 4 AA section view;

[0037] Figure 6 for Figure 5 B is a partial enlarged view;

[0038] Figure 7 A front view of a detection unit according to an embodiment of the present invention;

[0039] Figure 8 for Figure 7 CC section view;

[0040] Fig. 9 This is a schematic structural diagram of a dimming component in a first state according to an embodiment of the present invention;

[0041] Fig.10 is a structural schematic diagram of a dimming component in a second state according to an embodiment of the present invention;

[0042] Fig.11 The figure is a flow chart of a method according to an embodiment of the present invention.

[0043] The figure marks in the drawings of the specification include: 1. main shell; 2. inlet; 3. outlet; 4. light source board; 5. first slide groove; 6. second slide groove; 7. sub-shell; 8. ultraviolet lamp; 9. pyramid; 10. installation area; 11. reflective layer; 12. light-transmitting plate; 13. light-transmitting side wall; 14. drive plate; 15. screw; 16. drive member; 101. collimated laser light source; 102. photoelectric receiver. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The following is further described in detail through specific implementation methods:

[0046] Embodiment 1:

[0047] As attached Figure 1 As shown: A photocatalyst degradation performance detection system, mainly composed of a detection unit, a pollutant concentration detection module, an ultraviolet light source component, a dimming component, a driving component, a temperature control component and a processing module, wherein the detection unit is mainly used to provide a detection space for the degradation performance of the photocatalyst, mainly including a space for accommodating the photocatalyst whose degradation performance is to be detected and the pollutants to be degraded. The pollutant concentration detection module is mainly used to detect the concentration of pollutants entering and outputting the detection unit, and to obtain the degradation performance of the photocatalyst by performing a before-and-after comparison through the processing module. The ultraviolet light source component is used to provide the basic illumination required for photocatalyst catalysis, and to adjust the illumination intensity through the dimming component, so as to meet the photocatalyst performance detection requirements under different illumination conditions, and the dimming component is driven by the driving component. The temperature control component is used to provide temperature conditions for photocatalyst degradation catalysis, so as to meet the photocatalyst performance detection requirements under different temperature conditions.

[0048] Based on the overall structure of the above-mentioned photocatalyst degradation performance detection system, the detailed structure and operation principle of the photocatalyst degradation performance detection system are described below:

[0049] First, combine the attached Figure 3 As shown, the detection unit includes a main housing 1, i.e. Figure 3 In the rectangular housing shown in the figure, an inlet 2 and an outlet 3 are respectively arranged at both ends of the main housing 1, the inlet 2 is used to provide a channel for the pollutants to be degraded to enter, and the outlet 3 is used to provide a channel for the pollutants to be degraded to be discharged. In order to facilitate the detection of the pollutant concentration when the pollutants to be degraded enter and are discharged, the pollutant concentration detection module is arranged in the inlet 2 and the outlet 3 in this embodiment.

[0050] Specifically, in combination with Figure 4 and attached Figure 5As shown, the pollutant concentration detection module includes a collimated laser light source 101 arranged on the side walls of the inlet 2 and the outlet 3, a photoelectric receiver 102 arranged on the side walls of the collimated laser light source 101 opposite to the inlet 2 and the outlet 3, and a signal processing circuit. The collimated laser light source 101 is used to emit laser light to the pollutants (waste gas or waste water) passing through the inlet 2 and the outlet 3. The laser light is scattered after contacting the particles in the pollutants, and the intensity of the scattered light is proportional to the mass concentration of the particles; the photoelectric receiver 102 is used to receive the laser light scattered by the pollutants passing through the inlet 2 and the outlet 3, and convert it into an electrical signal. Combined with the attached Figure 2 As shown, the collimated laser light source 101 and the photoelectric receiver 102 are connected to a signal processing circuit. The signal processing circuit can obtain the data of the laser emitted by the collimated laser light source 101, and amplify and filter the electrical signal converted by the photoelectric receiver 102, convert it into an electrical pulse, and then measure the number of pulses per unit time. According to the number of pulses per unit time, the mass concentration of the particulate matter is calculated.

[0051] Secondly, combined with the Figure 5 -Attached Fig.10 As shown, a sub-shell 7 is arranged inside the main shell 1, and the sub-shell 7 is connected with the inlet 2 and the outlet 3 through a pipeline. The sub-shell 7 needs at least two side walls to be light-transmitting side walls 13 made of light-transmitting materials. In order to provide a sufficient light-transmitting area, the upper and lower side walls of the sub-shell 7 are selected as the light-transmitting side walls 13 in this embodiment, and the inner side wall of the main shell 1 corresponding to the light-transmitting side wall 13 is provided with an ultraviolet light source assembly. Specifically, the ultraviolet light source assembly includes a light source board 4, preferably the light source board 4 and the light-transmitting side wall 13 are parallel to each other, and a plurality of ultraviolet lamps 8 are arranged in an array on the light source board 4, and the ultraviolet lamps 8 are connected to the processing module signal, and the ultraviolet lamps 8 can be independently turned on and off by the processing module. The area of ​​the light source board 4 is not less than the corresponding light-transmitting side wall 13, ensuring that the light-transmitting side wall 13 can be fully covered when all the ultraviolet lamps 8 are turned on.

[0052] The dimming component is arranged inside the auxiliary housing 7. Specifically, the dimming component includes two light-transmitting plates 12 slidably connected to the side walls of the auxiliary housing 7 and made of a light-transmitting material. Preferably, the light-transmitting side walls 13, the light source board 4 and the light-transmitting plates 12 are parallel to each other. The lower side and the upper side of the inner side wall of the auxiliary housing 7 are respectively provided with a first slide groove 5 and a second slide groove 6, and the two light-transmitting plates 12 are respectively slidably connected in the first slide groove 5 and the second slide groove 6. A plurality of pyramids 9 are arranged in an array on the opposite surfaces of the two light-transmitting plates 12, and the angle between the bottom surface of the pyramid 9 and the side surface of the pyramid 9 is in the range of 30-60 degrees. In this embodiment, the angle between the bottom surface of the pyramid 9 and the side surface of the pyramid 9 is 60 degrees. The bottom surface of the pyramid 9 is fixedly connected to the surface of the light-transmitting plate 12, and the pyramids 9 on the surfaces of the two light-transmitting plates 12 are arranged in an interlaced manner to ensure that the two light-transmitting plates 12 will not be interfered by the pyramid 9 when sliding.

[0053] The pyramid 9 of this embodiment is a quadrangular pyramid 9, which consists of a bottom surface and four triangular side surfaces, and each of the four triangular side surfaces is provided with a plurality of installation areas 10 and reflective layers 11, wherein the installation area 10 is used for installing a photocatalyst to be tested for degradation performance, and the reflective layer 11 is used for reflecting light onto the photocatalyst to adjust the lighting conditions during the degradation of the photocatalyst, and the installation areas 10 and reflective layers 11 located on the same triangular side surface are arranged alternately.

[0054] The temperature control component for adjusting the detection environment temperature is arranged inside the main shell 1. Specifically, the temperature control component includes a hot and cold control board and a temperature sensor fixedly connected to the inner wall of the main shell 1. The hot and cold control board can select a semiconductor refrigeration plate to achieve cooling and heating. The hot and cold control board is arranged on the inner wall of the main shell 1 corresponding to the non-translucent side wall 13. The temperature sensor can select multiple settings at different points inside the main shell 1 to ensure that the temperature of multiple points can be detected, which is convenient for accurately adjusting the temperature inside the main shell 1. The hot and cold control board and the temperature sensor are both connected to the processing module signal. The processing module is used to control the operation of the hot and cold control board based on the temperature data collected by the temperature sensor, thereby adjusting the temperature inside the main shell 1 and adjusting the temperature conditions during the degradation of the photocatalyst.

[0055] The driving component is used to drive the dimming component to operate. Specifically, the driving component includes a magnetic component fixedly connected to the side wall of the light-transmitting plate 12. The magnetic component is preferably a permanent magnet. In order not to affect the normal sliding of the light-transmitting plate 12, the magnetic component is embedded in the side wall of the light-transmitting plate 12. A driving plate 14 is slidably connected between the main shell 1 and the sub-shell 7 at the corresponding position of the side wall of the light-transmitting plate 12. The driving plate 14 can slide along the sliding direction of the light-transmitting plate 12. An electromagnet is fixedly connected to the driving plate 14 on the side close to the side wall of the light-transmitting plate 12. A driving member 16 is arranged between the main shell 1 and the sub-shell 7. Preferably, the driving member 16 adopts a stepping motor. The output shaft of the driving member 16 is coaxially fixedly connected with a lead screw 15. The nut of the lead screw 15 is fixedly connected to the driving plate 14. The driving member 16 and the electromagnet are connected to the processing module signal. The processing module controls the operation of the driving member 16 to make the driving plate 14 slide. At the same time, the electromagnet is energized to realize that the driving plate 14 drives the light-transmitting plate 12 to slide, thereby realizing the position adjustment between the light-transmitting plates 12, and then realizing the position adjustment of the pyramid 9 on the surface of the light-transmitting plate 12.

[0056] The operating principle of the dimming component:

[0057] Since both the transparent side wall 13 and the transparent plate 12 can allow the ultraviolet light emitted by the ultraviolet light source assembly to pass through, in the initial state (such as the attached Fig. 9, first state), the ultraviolet light emitted by the ultraviolet light source assembly located at the top of the main shell 1 irradiates the photocatalyst surface of the installation area 10 of the pyramid 9 on the light-transmitting plate 12 on the lower side, and the photocatalyst surface absorbs the light energy emitted by the ultraviolet lamp 8, and the light energy excites the electrons in the photocatalyst, causing it to jump from the valence band to the conduction band, thereby leaving holes in the valence band. The electrons in the conduction band have reducing ability and can participate in the reduction process in the chemical reaction; the holes in the valence band have oxidizing ability and can react with water molecules to generate highly active intermediates such as strongly oxidizing hydroxyl free radicals; thereby degrading pollutants. The ultraviolet light emitted by the ultraviolet light source assembly located at the top of the main shell 1 irradiates the reflective layer of the pyramid 9 on the light-transmitting plate 12 on the lower side. At this time, the ultraviolet light reflected by the reflective layer does not irradiate the photocatalyst surface of the installation area 10 of other pyramids 9.

[0058] The driving member 16 is operated to make the pyramids 9 provided on the light-transmitting plate 12 move relatively, and the state after the movement (such as the attached Fig.10 , second state), as shown in the attached Figure 6 As shown, the pyramids 9 of the upper light-transmitting plate 12 are staggered with the pyramids 9 of the lower light-transmitting plate 12, and the ultraviolet light emitted by the ultraviolet light source assembly located on the top of the main shell 1 irradiates the photocatalyst surface of the installation area 10 of the pyramids 9 on the lower light-transmitting plate 12, and at the same time irradiates the reflective layer of the pyramids 9 on the lower light-transmitting plate 12. At this time, the ultraviolet light reflected by the reflective layer begins to gradually irradiate the photocatalyst surface of the installation area 10 of other pyramids 9, and the area of ​​the photocatalyst surface of the installation area 10 of other pyramids 9 irradiated by the ultraviolet light reflected by the reflective layer increases within a certain range as the spacing between the pyramids 9 increases. The solid arrow indicates the optical path of the ultraviolet light emitted by the ultraviolet light source assembly located at the top of the main shell 1 and irradiated onto the reflective layer of the pyramid 9 on the lower light-transmitting plate 12. The dotted arrow indicates the optical path of the ultraviolet light emitted by the ultraviolet light source assembly located at the bottom of the main shell 1 and irradiated onto the reflective layer of the pyramid 9 on the upper light-transmitting plate 12. The reflected ultraviolet light energy and the direct light energy of the ultraviolet lamp 8 are superimposed on the same photocatalyst surface, so that the photocatalyst receives more ultraviolet light energy, thereby realizing the adjustment of ultraviolet light conditions during the degradation process of the photocatalyst.

[0059] The processing module is used to obtain and record the pollutant concentration data detected by the pollutant concentration detection module, control the operation of the ultraviolet light source component, the driving component and the temperature control component, and calculate the pollutant degradation performance of the photocatalyst under multiple groups of different lighting conditions and different detection environment temperature conditions, so as to realize continuous online photocatalyst degradation performance detection. When the photocatalyst degradation performance detection system of this embodiment detects the pollutant degradation performance of the photocatalyst under lighting conditions and different detection environment temperature conditions, there is no need to adjust the irradiation position of the ultraviolet lamp 8 or the installation position of the photocatalyst multiple times. It can continuously detect online and output multiple groups of photocatalyst degradation performance results. And through the simulation of the ultraviolet lamp 8 light and the photocatalyst setting position, it can provide a reference basis for the ultraviolet lamp 8 and the photocatalyst setting position when the photocatalyst is actually used for pollutant degradation, in addition to providing a reference basis for lighting conditions and temperature conditions, it can also provide a reference basis for the ultraviolet lamp 8 and the photocatalyst setting position.

[0060] Combined with Fig.11 As shown, the method of using the above-mentioned photocatalyst degradation performance detection system is as follows:

[0061] First, pollutants are introduced from the inlet 2, and the concentration of the pollutants introduced from the inlet 2 is detected by the pollutant concentration detection module to generate the undegraded pollutant concentration.

[0062] Then, the pollutants are allowed to pass through the main shell 1 into the auxiliary shell 7, and sequentially pass through the installation area 10 containing the photocatalyst. At the same time, the ultraviolet light source assembly irradiates the photocatalyst, so that the photocatalyst acts to degrade the pollutants passing through.

[0063] When the pollutants are discharged from the outlet 3, the concentration of the pollutants discharged from the outlet 3 is detected by the pollutant concentration detection module to generate the concentration of the pollutants after degradation.

[0064] The processing module obtains and records the pollutant concentration data detected by the pollutant concentration detection module, and controls the operation of the driving component and the temperature control component. The driving component drives the dimming component to adjust the illumination conditions of the photocatalyst; the temperature control component adjusts the detection environment temperature.

[0065] Repeat the above steps to obtain and record the concentration changes of pollutants before and after degradation under multiple groups of different lighting conditions and different test environment temperature conditions, and calculate the corresponding photocatalyst degradation performance. The photocatalyst degradation performance is quantified by the degradation efficiency, which is the amount of pollutants degraded by the photocatalyst per unit time (the amount by which the concentration of the pollutant after degradation is reduced compared to the concentration of the undegraded pollutant).

[0066] Embodiment 2:

[0067] The difference from Example 1 is that since the adjustment of the light conditions and temperature conditions has a certain delay, that is, it is impossible to immediately detect the change in pollutant concentration after the light conditions and temperature conditions are adjusted to obtain accurate photocatalyst degradation performance of pollutants under the adjusted light conditions and temperature conditions. Therefore, it is necessary to verify the effectiveness of the detected pollutant concentration. The details are as follows:

[0068] The processing module is connected to the signal processing circuit signal, and the processing module detects the validity of the pollutant concentration data. The processing module is used to obtain the pollutant concentration data within a preset unit time, and compare the pollutant concentration data within each unit time. When the difference value of the pollutant concentration data within each unit time is lower than the threshold value, the pollutant concentration data within the preset unit time is determined to be valid. That is, when the detected pollutant concentration data tends to be stable, the collected pollutant concentration data is determined to be valid pollutant concentration data. After successfully obtaining and recording the valid pollutant concentration data, the ultraviolet light source component, the drive component and the temperature control component are controlled to operate, thereby adjusting the lighting conditions and temperature conditions, and continuously completing multiple groups of photocatalyst performance tests under different lighting conditions and temperature conditions.

[0069] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A photocatalyst degradation performance detection system, characterized in that: The detection unit comprises an inlet and an outlet, and the outlet and the inlet of the detection unit are both provided with a pollutant concentration detection module, and the pollutant concentration detection module is used to detect the concentration of pollutants passing through; The detection unit comprises a main shell, a sub-shell is arranged inside the main shell, the sub-shell is connected with the inlet and the outlet, the sub-shell has at least two side walls made of light-transmitting materials, a dimming component is arranged inside the sub-shell, and a mounting area for accommodating the photocatalyst to be detected is arranged on the dimming component, a temperature control component for adjusting the detection environment temperature and a driving component for driving the dimming component to operate are arranged inside the main shell, and an ultraviolet light source component is arranged on the inner side wall of the main shell corresponding to the light-transmitting side wall; It also includes a processing module, which is used to obtain and record the pollutant concentration data detected by the pollutant concentration detection module, and detect the validity of the pollutant concentration data. After obtaining and recording the valid pollutant concentration data, the ultraviolet light source component, the driving component and the temperature control component are controlled to operate, and the pollutant degradation performance of the photocatalyst under multiple groups of different illumination conditions and different detection environment temperature conditions is calculated; The dimming component includes at least two light-transmitting plates which are slidably connected to the side walls of the auxiliary shell and are made of light-transmitting material. A plurality of pyramids are arranged in an array on the opposite surfaces of the two light-transmitting plates. The bottom surfaces of the pyramids are fixedly connected to the surfaces of the light-transmitting plates, and the pyramids on the surfaces of the two light-transmitting plates are arranged alternately. A plurality of installation areas and reflective layers are provided on the surfaces of the pyramids, and the installation areas and reflective layers on the same surface of the pyramids are arranged alternately.

2. The photocatalyst degradation performance detection system according to claim 1, characterized in that: The pollutant concentration detection module includes a collimated laser light source arranged on the side walls of the inlet and outlet, a photoelectric receiver arranged on the side walls of the collimated laser light source opposite to the inlet and outlet, and a signal processing circuit. The photoelectric receiver is used to receive the laser signal after being scattered by the pollutant and convert the laser signal into an electrical signal. The signal processing circuit is used to process the electrical signal and output the pollutant concentration.

3. The photocatalyst degradation performance detection system according to claim 1, characterized in that: The processing module is connected to the signal processing circuit signal. The processing module is used to obtain the pollutant concentration data within a preset unit time and compare the pollutant concentration data within each unit time. When the difference between the pollutant concentration data within each unit time is lower than a threshold value, the pollutant concentration data within the preset unit time is determined to be valid.

4. The photocatalyst degradation performance detection system according to claim 1, characterized in that: The temperature control component includes a hot and cold control board and a temperature sensor fixedly connected to the inner wall of the main shell. Both the hot and cold control board and the temperature sensor are connected to the signal of the processing module. The processing module is used to control the operation of the hot and cold control board based on the temperature data collected by the temperature sensor.

5. The photocatalyst degradation performance detection system according to claim 1, characterized in that: The ultraviolet light source assembly includes a light source board, on which a plurality of ultraviolet lamps are arranged in an array, and the ultraviolet lamps can be turned on and off independently, and the area of ​​the light source board is not smaller than the corresponding light-transmitting side wall.

6. The photocatalyst degradation performance detection system according to claim 1, characterized in that: The light-transmitting side wall, the light source plate and the light-transmitting plate are parallel to each other.

7. The photocatalyst degradation performance detection system according to claim 1, characterized in that: The angle between the base of the pyramid and the side surface of the pyramid is 30-60 degrees.

8. The photocatalyst degradation performance detection system according to claim 1, characterized in that: The driving assembly includes a magnetic part fixedly connected to the side wall of the light-transmitting plate, a driving plate is slidably connected between the main shell and the sub-shell at the corresponding position of the side wall of the light-transmitting plate, an electromagnet is fixedly connected to the side of the driving plate close to the side wall of the light-transmitting plate, a driving part is arranged between the main shell and the sub-shell, the output shaft of the driving part is coaxially fixedly connected to a lead screw, the nut of the lead screw is fixedly connected to the driving plate, and the driving part and the electromagnet are connected to the signal of the processing module.

9. A method for detecting photocatalyst degradation performance, characterized in that: The method is based on the photocatalyst degradation performance detection system according to any one of claims 1 to 8, comprising the following steps: The pollutants are introduced into the inlet, and the concentration of the pollutants introduced into the inlet is detected by the pollutant concentration detection module; The pollutants are allowed to pass through the main housing into the auxiliary housing, and then pass through the installation area containing the photocatalyst in sequence, while the ultraviolet light source assembly irradiates the photocatalyst, thereby degrading the pollutants passing through; When the pollutants are discharged from the outlet, the concentration of the pollutants discharged from the outlet is detected by the pollutant concentration detection module; The processing module obtains and records the pollutant concentration data detected by the pollutant concentration detection module, and detects the validity of the pollutant concentration data. After obtaining and recording the valid pollutant concentration data, the driving component and the temperature control component are controlled to operate; The driving component drives the dimming component to operate to adjust the lighting conditions of the photocatalyst; the temperature of the detection environment is adjusted by the temperature control component; Repeat the above steps to obtain and record the concentration changes of pollutants before and after degradation under multiple groups of different lighting conditions and different detection ambient temperature conditions, and calculate the corresponding photocatalyst degradation performance.

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