Gas photocatalysis-degradation multi-parameter experimental device

Abstract

The utility model discloses a gas photocatalysis-degradation multi-parameter experimental device and relates to the technical field of experimental equipment. The experimental device comprises a gas source, the gas source is externally connected with a pressure reducing valve and a pressure gauge, the pressure reducing valve is connected to a gas mixing tank through a pipeline, a ball valve and a flow meter, gas in the gas mixing tank is introduced into a reaction kettle through a gas inlet valve for reaction and then enters a photoacoustic spectrometer or is discharged through a gas outlet valve and a three-way valve, a light shield is installed outside the reaction kettle, and a light source is arranged above the light shield. The light source is externally connected with a power supply. According to the utility model, through the components such as the gas flowmeter, the electric heating wire, the temperature sensor, the light guide hole, the lifting platform, the optical filter and the current adjusting knob, the singleness and coupling influence rules of parameters such as gas concentration, flow, reaction temperature, illumination area, illumination distance, light source wave band, power and catalyst type on gas photocatalysis-degradation characteristics can be tested.

Description

Technical Field

[0001] This utility model belongs to the technical field of experimental equipment, specifically relating to a gas photocatalytic degradation multi-parameter experimental device. Background Technology

[0002] In recent years, photocatalysis and photodegradation have been widely used in environmental protection, energy conversion and chemical synthesis due to their advantages such as environmental protection, energy saving and high efficiency. Scholars have also carried out a lot of experimental research in this field.

[0003] According to the search, Chinese patent document CN219209877U discloses a gas-solid phase photocatalytic reactor. This reactor includes a reactor body, a catalyst support, an inlet pipe, an outlet pipe, and a control pipe. The control pipe is connected to the reaction chamber, allowing the reactant gas to circulate in a loop, ensuring more thorough contact between the reactant gas and the catalyst, thereby improving reaction efficiency. However, as the prior art shows, current photocatalytic degradation experimental devices have simple structures and cannot simultaneously adjust multiple key parameters such as gas concentration, flow rate, reaction temperature, light source wavelength, power, illumination distance, and area. Since the efficiency of the photocatalytic degradation reaction is significantly affected by the coupling effect of multiple parameters such as light intensity, gas concentration, and temperature, there is an urgent need to develop a multi-parameter photocatalytic degradation experimental device capable of simultaneously controlling multiple reaction conditions and adjusting multiple variable parameters. Utility Model Content

[0004] The purpose of this invention is to provide a multi-parameter experimental device for gas photocatalysis-degradation, which solves the technical problem that existing photocatalysis-degradation experimental devices have simple structures and cannot simultaneously adjust multiple key parameters.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-parameter experimental device for gas photocatalytic degradation includes: a gas source, a mixing tank, a reaction vessel, a light shield, a light source, a power supply, and a photoacoustic spectrometer; the gas source is externally connected to a pressure reducing valve and a pressure gauge, the pressure reducing valve is connected to the mixing tank via a pipeline through a ball valve and a flow meter, the gas in the mixing tank is introduced into the reaction vessel through an inlet valve to react, and then enters the photoacoustic spectrometer or is discharged through an exhaust valve and a three-way valve; a light shield is installed outside the reaction vessel, and a light source is set above the light shield, the light source being externally connected to a power supply.

[0007] Preferably, the flow meter has an adjustable range of 0.1~5 L / min and a minimum division of 0.1 L / min.

[0008] Preferably, the reaction chamber of the reactor contains a quartz fiber plate loaded with a catalyst, with a temperature sensor arranged above the quartz fiber plate and heating wires arranged below it.

[0009] Preferably, the reactor is made of glass, and the outer wall of the reactor is provided with a reactor air inlet and a reactor exhaust outlet.

[0010] Preferably, the heating wire has a heating range of 0~150 ℃, and the temperature sensor has a range of 0~200 ℃ and a minimum division of 0.1 ℃.

[0011] Preferably, the top of the light shield is provided with a light guide hole, and the diameter of the light guide hole can be changed by installing different sized hole covers, with the diameter variation range being 5~100 mm.

[0012] Preferably, the light shield is made of anodized aluminum with a light-shielding rate of >99% and a temperature resistance range of -50~200 ℃.

[0013] Preferably, the light source is a xenon lamp with a power of 150~320 W; the light source is set on the lifting platform, which has a scale and a height adjustment range of 0~50 cm, with a minimum division of 1 mm.

[0014] Preferably, the light source is equipped with a filter, the wavelength of which is adjustable from 200 to 800 nm; the power supply has a current adjustment knob, adjustable from 14 to 21 A.

[0015] Preferably, the photoacoustic spectrometer has an air intake pipe connected to a three-way valve for air intake sampling at one end, and an air exhaust pipe connected to an external outlet at the other end; the photoacoustic spectrometer can monitor volatile organic compounds, hydrocarbons, CO, CO2, H2O, H2S, NO, NO2, N2, NF3, NH3, SF6, and SO2 gases.

[0016] The beneficial effects of this utility model are:

[0017] This invention relates to a multi-parameter experimental device for gas photocatalysis-degradation. By installing a series of components, it can experimentally test the single and coupled effects of multiple key parameters on the gas photocatalytic-degradation characteristics, which is beneficial for conducting multi-parameter experiments on gas photocatalysis-degradation. Specifically, the concentration and flow rate of the experimental gas are changed by using a flow meter and a gas storage tank; the reaction temperature can be changed and monitored in real time by installing an electric heating wire and a temperature sensor inside the reaction vessel; the illumination area can be changed by changing the cover of the light guide hole of the light shield; the illumination distance can be changed by controlling the height of the light source through the lifting platform; the wavelength of the light source can be changed by installing a filter; and the power of the light source, i.e., the light intensity, is controlled by the current adjustment knob of the external power supply. Attached Figure Description

[0018] For ease of explanation, this utility model is described in detail below with reference to the specific embodiments and accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0020] Figure 2 This is a schematic diagram of the reactor structure in this embodiment.

[0021] In the picture:

[0022] 1-Gas source; 2-Pressure reducing valve; 3-Pressure gauge; 4-Ball valve; 5-Flow meter; 6-Gas mixing tank; 7-Inlet valve; 8-Reaction vessel; 81-Sealing clamp; 82-Top cover; 83-Temperature sensor; 84-Quartz fiber board; 85-Heating wire; 86-Reaction vessel inlet; 87-Reaction vessel outlet; 9-Exhaust valve; 10-Light shield; 101-Light guide hole; 11-Light source; 111-Lifting platform; 112-Filter; 12-Power supply; 121-Current adjustment knob; 13-Three-way valve; 14-Photoacoustic spectrometer; 141-Inlet pipe; 142-Exhaust pipe. Detailed Implementation

[0023] The following are specific embodiments of the present invention described in conjunction with the accompanying drawings, further illustrating the technical solution of the present invention. However, the present invention is not limited to these embodiments. Specific details such as particular configurations and components are provided in the following description merely to aid in a comprehensive understanding of the embodiments of the present invention. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0024] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0025] like Figure 1-2 As shown, this embodiment provides a gas photocatalytic degradation multi-parameter experimental device, including a gas source 1, a mixing tank 6, a reaction vessel 8, a light shield 10, a light source 11, a power supply 12, and a photoacoustic spectrometer 14. The gas source 1 is externally connected to a pressure reducing valve 2 and a pressure gauge 3. The pressure reducing valve 2 is connected to the mixing tank 6 through a pipeline via a ball valve 4 and a flow meter 5. The gas in the mixing tank 6 is introduced into the reaction vessel 8 through an inlet valve 7 to react, and then enters the photoacoustic spectrometer 14 or is discharged through an exhaust valve 9 and a three-way valve 13. A light shield 10 is installed outside the reaction vessel 8, and a light source 11 is set above the light shield 10. The light source 11 is externally connected to the power supply 12.

[0026] In this embodiment, the reactor 8 is made of glass, and the reactor cover 82 is fixed by a sealing clamp 81 to ensure the airtightness of the device. A quartz fiber plate 84 loaded with catalyst is placed inside the reaction chamber of the reactor 8. The quartz fiber plate 84 can load catalysts in different forms, such as powder or granules, while ensuring gas flow. An electric heating wire 85 is arranged below the quartz fiber plate 84, with a heating range of 0~150 ℃. A temperature sensor 83 is arranged above the quartz fiber plate 84, with a range of 0~200 ℃ and a minimum division of 0.1 ℃. While the electric heating wire 85 heats the catalyst and reaction gas, the temperature sensor 83 measures the reaction temperature in real time to achieve temperature control and real-time monitoring. The outer wall of the reactor has a reactor inlet 86 and a reactor exhaust port 87. During the experiment, gas enters through the reactor inlet 86, passes vertically through the quartz fiber plate 84 in the reaction chamber, and exits through the reactor exhaust port 87.

[0027] In this embodiment, the gas source 1 is externally connected to a pressure reducing valve 2 and a pressure gauge 3. The pressure reducing valve 2 is connected to the same mixing tank 6 via a ball valve 4 and a flow meter 5. The flow meter 5 has an adjustable range of 0.1~5 L / min and a minimum division of 0.1 L / min. Specifically, installing the pressure reducing valve 2 and pressure gauge 3 can reduce and stabilize the gas pressure and monitor the gas state. The gas source 1, in conjunction with the ball valve 4, flow meter 5, and mixing tank 6, can change the ratio of the experimental gas to the background gas, thereby controlling the gas concentration and flow rate.

[0028] In this embodiment, the light shield 10 is made of anodized aluminum with a light-blocking rate >99% and a temperature resistance range of -50~200℃. The top of the light shield 10 has a light guide hole 101, the diameter of which can be changed from 5 to 100 mm by installing different sized caps. Specifically, the light shield 10 isolates external light, reducing the influence of other light sources on the experiment. The aperture of the light guide hole 101 and the illumination area can be changed by replacing the caps, making the operation simple and convenient.

[0029] In this embodiment, a xenon lamp with a power of 150~320 W is selected as the light source 11 and is set on the lifting platform 111. The lifting platform 111 has a scale, and the height adjustment range is 0~50 cm with a minimum division of 1 mm. The light source 11 is equipped with a filter 112. By changing the filter 112, the wavelength of the light source can be adjusted to 200~800 nm. The light source 11 is connected to an external power supply 12, which has a current adjustment knob 121 with an adjustable range of 14~21 A. Specifically, by simply operating the lifting platform 111, the filter 112, and the current adjustment knob 121, experimental conditions such as illumination distance, light source wavelength, current, power, and irradiation intensity can be changed, which is beneficial for carrying out multi-parameter experimental research on gas photocatalysis-degradation.

[0030] In this embodiment, the photoacoustic spectrometer 14 is connected to a three-way valve 13 via an air inlet pipe 141 for air intake sampling, and an external air outlet pipe 142 for exhaust. The photoacoustic spectrometer 14 can monitor volatile organic compounds, hydrocarbons, CO, CO2, H2O, H2S, NO, NO2, N2, NF3, NH3, SF6, SO2 and other gases. In addition, the photoacoustic spectrometer 14 has a monitoring response time of about 1 minute, displays gas concentration in ppm, and has a monitoring limit of less than 0.1 ppb.

[0031] The working principle of this embodiment is as follows: During operation, the operator first turns on the gas source 1, adjusts the pressure reducing valve 2 and observes the pressure gauge 3 to ensure gas stability; then, the ball valve 4 and flow meter 5 are adjusted to allow the two gas streams to enter the gas storage tank 6 at the pre-designed flow rate. The light source 11 is turned on, and the light passes through the light guide hole 101 to irradiate the catalyst cross section on the quartz fiber plate 84. After the gas mixing is completed, the flow meter 5 is adjusted and the ball valve 4 is opened to allow the gas to enter the reactor 8 from the reactor inlet 86. Under the illumination of the light source 11, the gas passes vertically through the catalyst cross section to undergo a photocatalytic reaction. At the same time, the temperature sensor 83 is used to monitor and record the reaction temperature. Then, the gas is discharged from the reactor exhaust port 87, passes through the exhaust valve 9 and the three-way valve 13 to enter the photoacoustic spectrometer 14 for monitoring and recording of the gas concentration after the reaction. Excess gas is discharged through the three-way valve 13. After the photoacoustic spectrometer 14 finishes monitoring, the gas is discharged from the device through the exhaust pipe 142.

[0032] During the above operations, while keeping other conditions constant, adjusting the reading of flow meter 5 can change the gas concentration and flow rate; connecting the heating wire 85 can increase or control the reaction temperature; changing the cover of the light guide hole 101 of different sizes can change the illumination area; changing the filter 112 can change the light source wavelength; adjusting the height of the lifting platform 111 can change the illumination distance; and adjusting the current adjustment knob 121 can change the light source power, thereby changing the light intensity. Through the above operations, variables can be controlled, different experimental parameters can be adjusted, and multi-parameter experiments of photocatalysis-degradation can be carried out.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

Claims

1. A gas photocatalytic-degradation multi-parameter experimental device, characterized in that, The utility model relates to a kind of photoacoustic spectrometer, including: Air source (1), gas mixing tank (6), reaction kettle (8), light shield (10), light source (11), power supply (12) and photoacoustic spectrometer (14); The air source (1) is connected with pressure reducing valve (2) and pressure gauge (3), the pressure reducing valve (2) is connected to gas mixing tank (6) by pipeline through ball valve (4) and flowmeter (5), the gas in the gas mixing tank (6) is introduced into reaction kettle (8) through inlet valve (7) and reacts, then enters photoacoustic spectrometer (14) or is discharged through exhaust valve (9), three-way valve (13);The light shield (10) is installed outside the reaction kettle (8), the light source (11) is arranged above the light shield (10), and the light source (11) is connected with power supply (12). 2.The gas photocatalytic-degradation multi-parameter experimental device according to claim 1, characterized in that, The flowmeter (5) can be adjusted in the range of 0.1~5 L / min, with a minimum scale of 0.1 L / min. 3.The gas photocatalytic-degradation multi-parameter experimental device according to claim 1, characterized in that, The quartz fiber plate (84) loaded with catalyst is arranged in the reaction cavity of the reaction kettle (8), and a temperature sensor (83) is arranged above the quartz fiber plate (84), and an electric heating wire (85) is arranged below. 4.The gas photocatalytic-degradation multi-parameter experimental device according to claim 1, characterized in that, The reaction kettle is made of glass, and the reaction kettle has a reaction kettle gas inlet (86) and a reaction kettle gas outlet (87) on the outer wall.

5. The gas photocatalytic-degradation multi-parameter experimental device according to claim 3, characterized in that, The electric heating wire (85) has a heating range of 0~150 ℃, and the temperature sensor (83) has a range of 0~200 ℃ and a minimum scale of 0.1 ℃. 6.The gas photocatalytic-degradation multi-parameter experimental device according to claim 1, characterized in that, The light shield (10) has a light guide hole (101) at the top, and the diameter of the light guide hole (101) can be changed by installing different size hole covers, with a diameter change range of 5~100mm.

7. The gas photocatalytic-degradation multi-parameter experimental device according to claim 1 or 6, characterized in that, The light shield (10) is made of anodized aluminum, with a light shielding rate of >99% and a temperature resistance range of -50~200 ℃. 8.The gas photocatalytic-degradation multi-parameter experimental device according to claim 1, characterized in that, The light source (11) is a xenon lamp with a power of 150~320 W; the light source (11) is arranged on a lifting platform (111), and the lifting platform has a scale with a height adjustment range of 0~50 cm and a minimum scale of 1mm. 9.The gas photocatalytic-degradation multi-parameter experimental device according to claim 1, characterized in that, The light source (11) is equipped with a filter (112), and the filter (112) can adjust the wavelength to 200~800 nm; the power supply (12) has a current adjustment knob (121) with an adjustable range of 14~21 A. 10.The gas photocatalytic-degradation multi-parameter experimental device according to claim 1, characterized in that, One end of the photoacoustic spectrometer (14) is connected to the three-way valve (13) through the inlet pipe (141) to inhale and sample, and the other end is connected to the outlet pipe (142) to exhaust; the photoacoustic spectrometer (14) can monitor volatile organic compounds, hydrocarbons, CO, CO2, H2O, H2S, NO, NO2, N2, NF3, NH3, SF6 and SO2 gas.

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