A photocatalyst pavement material tail gas purification efficiency testing device

Abstract

The utility model relates to road surface material test technical field especially relates to a kind of photocatalyst road surface material tail gas purification efficiency testing device, including reaction box, arc track, test table, adjustable telescopic link and ultraviolet xenon lamp, wherein, the reaction box is located at the top of the test table;The arc track is erected in the top of the reaction box, and its both ends are fixedly connected with the test table;The adjustable telescopic link one end is slidably arranged on the arc track, and its position on the arc track can be locked by fastener;The adjustable telescopic link other end is fixedly connected with the ultraviolet xenon lamp, and the ultraviolet xenon lamp is towards the inside of the reaction box;The utility model proposes a kind of photocatalyst road surface material tail gas purification efficiency testing device, to solve the technical problem that the change of illumination intensity and incident angle in the existing test device cannot simulate road environment, leading to the deviation of test result and real working condition is larger.

Description

Technical Field

[0001] This utility model relates to the field of road material testing technology, and in particular to a test device for the exhaust gas purification efficiency of photocatalytic road materials. Background Technology

[0002] Road surface materials with photocatalytic effects can effectively degrade NO under ultraviolet light irradiation. x Gaseous pollutants. Its purification efficiency depends on light conditions, especially light intensity and incident angle. Both fluctuate dynamically with solar altitude angle, weather conditions, diurnal variation and road direction, directly affecting the excitation efficiency of photogenerated charge carriers and the degradation rate of pollutants.

[0003] Currently, most laboratory testing devices for photocatalytic pavement materials use fixed light sources for irradiation. For example, the exhaust gas degradation effect testing device disclosed in the utility model with authorization announcement number CN223022083U can evaluate the purification ability of materials under specific light conditions, but it cannot simulate the changes in light intensity and incident angle in the road environment, resulting in a large deviation between the test results and the actual working conditions. Utility Model Content

[0004] In view of this, this utility model proposes a test device for the exhaust gas purification efficiency of photocatalytic road surface materials, which aims to solve the technical problem that existing test devices cannot simulate the changes in light intensity and incident angle in the road environment, resulting in a large deviation between the test results and the actual working conditions.

[0005] The technical solution of this utility model is implemented as follows: This utility model provides a testing device for the exhaust gas purification efficiency of photocatalytic road surface materials, including a reaction chamber, an arc track, a test platform, an adjustable telescopic rod, and an ultraviolet xenon lamp. The reaction chamber is located on top of the test bench; The arc-shaped track is mounted above the reaction chamber, and its two ends are fixedly connected to the test platform; One end of the adjustable telescopic rod is slidably mounted on the arc-shaped track and its position on the arc-shaped track can be locked by fasteners; The other end of the adjustable telescopic rod is fixedly connected to the ultraviolet xenon lamp, which faces the interior of the reaction chamber.

[0006] Based on the above technical solutions, preferably, a T-shaped track groove is provided on the arc surface at the bottom of the arc-shaped track, and a T-shaped slider is provided at one end of the adjustable telescopic rod, wherein... The T-shaped slider is located inside the T-shaped track groove; The adjustable telescopic rod is provided with a nut seat on its side, and a second bolt is screwed onto the nut seat; One end of the second bolt abuts against the bottom surface of the arc-shaped track.

[0007] Based on the above technical solutions, preferably, the adjustable telescopic rod is a pneumatic cylinder or an electric cylinder, wherein... The cylinder body of the pneumatic or electric cylinder is provided with the T-shaped slider and nut seat.

[0008] Based on the above technical solutions, preferably, the adjustable telescopic rod includes an inner rod, an outer cylinder, and a first bolt, wherein, One end of the inner rod is slidably disposed on the inner side of the outer cylinder along the axial direction, and the other end is fixedly connected to the ultraviolet xenon lamp; The first bolt is screwed to the side of the outer cylinder, and one end of it abuts against the side of the inner rod; The outer cylinder is provided with the T-shaped slider and the nut seat.

[0009] Based on the above technical solutions, preferably, the reaction chamber is a transparent glass box.

[0010] Based on the above technical solutions, preferably, the top of the reaction chamber is provided with a transparent cover.

[0011] Based on the above technical solutions, preferably, the reaction chamber is equipped with a tail gas inlet pipe and an exhaust gas outlet pipe, wherein, The exhaust gas inlet pipe is connected to an exhaust gas storage bottle via a pipe. The exhaust pipe is connected to the external exhaust gas treatment box and the external gas detector via a tee.

[0012] Based on the above technical solutions, preferably, both the exhaust gas inlet pipe and the exhaust gas outlet pipe are equipped with valves.

[0013] Based on the above technical solutions, preferably, a flow meter is provided on the exhaust gas inlet pipe.

[0014] Based on the above technical solutions, preferably, the exhaust gas treatment box is provided with at least three adsorption layers.

[0015] Based on the above technical solutions, preferably, the exhaust gas storage bottle is detachably mounted on the top of the test bench.

[0016] The exhaust gas purification efficiency testing device for photocatalytic pavement materials of this invention has the following advantages over existing technologies: (1) By setting up an arc track and an adjustable telescopic rod in conjunction with an ultraviolet xenon lamp, the illumination angle and height of the light source can be flexibly adjusted to simulate the light incidence conditions under different solar altitude angles and road orientations, thereby improving the fidelity and reference value of the test results to the actual road environment and reducing test errors.

[0017] (2) By setting the reaction chamber as a transparent glass box, not only can the effective irradiation of the ultraviolet xenon lamp be ensured, but the reaction process can also be observed intuitively, which is convenient for real-time monitoring of the photocatalytic reaction status. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of a photocatalytic pavement material exhaust gas purification efficiency testing device according to the present invention; Figure 2 This is a front view of a photocatalytic pavement material exhaust gas purification efficiency testing device according to the present invention; Figure 3 A schematic diagram of the connection structure between the arc-shaped track and the adjustable telescopic rod; Figure 4 A schematic diagram of the connection structure between the inner rod and the outer cylinder; Figure 5 This is a schematic diagram of the internal structure of the exhaust gas treatment box. In the diagram: 1. Reaction chamber; 2. Arc-shaped track; 3. Test platform; 4. Adjustable telescopic rod; 5. Ultraviolet xenon lamp; 6. Tail gas storage bottle; 7. Waste gas treatment box; 8. Gas detector; 11. Tail gas inlet pipe; 12. Waste gas exhaust pipe; 41. Inner rod; 42. Outer cylinder; 43. First bolt; 44. T-shaped slider; 45. Nut seat; 46. Second bolt; 201. T-shaped track groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0022] In the description of the embodiments of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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 the embodiments of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0025] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0026] like Figure 1-5As shown, this utility model discloses a testing device for the exhaust gas purification efficiency of photocatalytic road surface materials, comprising a reaction chamber 1, an arc-shaped track 2, a test platform 3, an adjustable telescopic rod 4, and an ultraviolet xenon lamp 5. The reaction chamber 1 is located on top of the test platform 3, serving to accommodate the photocatalytic road surface material sample to be tested and provide a sealed reaction space. The arc-shaped track 2 is mounted above the reaction chamber 1, and its two ends are fixedly connected to the test platform 3, forming a stable support structure. One end of the adjustable telescopic rod 4 is slidably mounted on the arc-shaped track 2 and its position on the arc-shaped track 2 can be locked by fasteners. The other end of the adjustable telescopic rod 4 is fixedly connected to the ultraviolet xenon lamp 5, which faces the interior of the reaction chamber 1.

[0027] This structure, by sliding an adjustable telescopic rod 4 along the arc-shaped track 2 and adjusting its telescopic length, can flexibly change the irradiation angle and height of the ultraviolet xenon lamp 5, simulating the light incidence conditions under different solar altitude angles and road orientations, thereby improving the fidelity and reference value of the test results to the actual road environment and reducing test errors.

[0028] In this embodiment, a T-shaped track groove 201 is provided on the arc surface at the bottom of the arc-shaped track 2, and a T-shaped slider 44 is provided at one end of the adjustable telescopic rod 4. The T-shaped slider 44 is located inside the T-shaped track groove 201 and allows it to slide smoothly along the arc-shaped track 2. A nut seat 45 is provided on the side of the adjustable telescopic rod 4, and a second bolt 46 is screwed onto the nut seat 45. One end of the second bolt 46 abuts against the bottom surface of the arc-shaped track 2. In this structure, after adjusting to the required illumination angle, tightening the second bolt 46 can firmly lock the adjustable telescopic rod 4 onto the arc-shaped track 2, preventing the light source from shifting due to vibration or gravity during the test, ensuring a stable illumination angle, and improving the reliability of the test data.

[0029] The central angle of the arc-shaped track 2 is 180 degrees, which allows the illumination angle of the ultraviolet xenon lamp 5 to be adjusted within the range of 0° to 180°, covering the typical range of daytime solar incidence angle variations. Furthermore, the main emission wavelength of the ultraviolet xenon lamp 5 is 350nm, a wavelength close to the UVA region, which is ideal for exciting the photosensitive components in photocatalyst materials, thereby promoting NO… x Effective degradation of pollutants such as pollutants.

[0030] The adjustable telescopic rod 4 offers two structural forms to balance the stability of manual adjustment with the convenience of automatic adjustment.

[0031] One feature is the automated adjustment structure: the adjustable telescopic rod 4 is a pneumatic or electric cylinder, with a T-shaped slider 44 and a nut seat 45 on the cylinder body. The height of the ultraviolet xenon lamp 5 is rapidly adjusted via electric or pneumatic drive. The control method for the electric or pneumatic cylinder utilizes existing mature technology, allowing the stroke, speed, and positioning point to be set via a controller, making it suitable for scenarios requiring high-frequency adjustments or programmed testing.

[0032] The second type is a mechanical manual adjustment structure: the adjustable telescopic rod 4 is a manual telescopic rod, including an inner rod 41, an outer cylinder 42, and a first bolt 43. One end of the inner rod 41 is axially slidably disposed inside the outer cylinder 42, and the other end is fixedly connected to the ultraviolet xenon lamp 5. The first bolt 43 is screwed to the side of the outer cylinder 42, and one end of it abuts against the side of the inner rod 41. The T-shaped slider 44 and the nut seat 45 are both fixed to the side of one end of the outer cylinder 42. In this structure, the length of the adjustable telescopic rod 4 can be adjusted by pulling the inner rod 41, thereby adjusting the distance between the ultraviolet xenon lamp 5 and the reaction chamber 1, thus controlling the light intensity. Tightening the first bolt 43 can fix the length of the adjustable telescopic rod 4, thereby locking the position of the light source.

[0033] In this embodiment, the reaction chamber 1 is a glass box made of borosilicate glass with high light transmittance to ensure that the ultraviolet light emitted by the ultraviolet xenon lamp 5 efficiently penetrates the chamber wall and irradiates the surface of the photocatalyst material. At the same time, the glass material allows the experimenter to intuitively observe the reaction process, monitor the surface state of the material and gas changes in real time, and improve the visualization and ease of operation of the test.

[0034] Furthermore, the top of the reaction chamber 1 is equipped with an openable transparent cover, which is made of the same material as the reaction chamber 1. The transparent cover is connected to the chamber body by a hinge or buckle structure. When opened, it is convenient to place or replace the photocatalytic road surface material sample. When closed, it forms a sealed space to prevent exhaust gas leakage and ensure the accuracy of gas concentration and the safety of the experimental environment during the test.

[0035] Based on the above structure, the reaction chamber 1 is equipped with a tail gas inlet pipe 11 and an exhaust gas outlet pipe 12. The tail gas inlet pipe 11 is connected to a tail gas storage bottle 6 via a pipe. The exhaust gas outlet pipe 12 is connected to an external exhaust gas treatment box 7 and an external gas detector 8 via a tee.

[0036] Among them, the tail gas storage bottle 6 is used to introduce the gas required for the test (such as NO) into the reaction chamber 1. x The mixture of gases is detachably mounted on the top of the test bench 3 by fasteners (such as screws) and connected to the exhaust gas inlet pipe 11 by quick connectors or clamp structures, so as to facilitate the replacement of gas sources with different components or concentrations to meet the testing requirements of purification efficiency of various pollutants.

[0037] Gas Detector 8 is an existing pump-suction type four-in-one gas detector with a built-in electrochemical sensor. The gas to be measured undergoes an oxidation or reduction reaction at the working electrode of the sensor, generating a current signal proportional to the gas concentration. By measuring this current, the gas concentration can be quantitatively analyzed. This detector can simultaneously detect HC compounds, CO, and NO. x It contains typical motor vehicle exhaust components such as SO2, and has a built-in air pump that actively extracts gas from the reaction chamber 1 for real-time analysis during operation.

[0038] During the test, the simulated exhaust gas under the irradiation of ultraviolet xenon lamp 5 undergoes a photocatalytic degradation reaction with the photocatalytic pavement material. Part of the purified gas enters the gas detector 8 through the exhaust pipe 12 for component analysis, while the other part is introduced into the exhaust gas treatment box 7 for harmless treatment. This constructs a complete closed-loop test system of "exhaust gas introduction - photocatalytic reaction - gas detection - exhaust gas treatment", realizing a quantitative, dynamic and safety assessment of the exhaust gas purification efficiency of photocatalytic materials.

[0039] In this embodiment, both the exhaust gas inlet pipe 11 and the exhaust gas outlet pipe 12 are equipped with valves to control the intake of exhaust gas and the discharge of waste gas, respectively. Independent valves are installed between the exhaust gas outlet pipe 12 and the waste gas treatment box 7, and between the exhaust gas outlet pipe 12 and the external gas detector 8. Before testing, the valves can be closed to check the airtightness of the system; during testing, the valve opening is adjusted to maintain a stable airflow; after testing, the inlet valve is closed and the exhaust valve is opened to safely discharge residual gas, improving operational safety and process controllability.

[0040] A flow meter is installed on the exhaust gas inlet pipe 11 to monitor and control the exhaust gas flow rate entering the reaction chamber 1 in real time.

[0041] The exhaust gas treatment box 7 has at least three adsorption layers inside. The first layer is an acid gas removal layer, mainly treating SO2 and NO. x The second layer is an adsorption layer for organic pollutants and CO, used to adsorb untreated HC compounds and CO gas. The third layer is an oxidizing gas-assisted adsorption layer, whose main function is to adsorb gases that were not completely adsorbed in the first two layers.

[0042] This utility model provides a method for using a test device for testing the exhaust gas purification efficiency of photocatalytic pavement materials, specifically including the following two test procedures, which are used to evaluate the effects of light intensity (i.e., light intensity) and light angle on the material's purification performance: I. Test Procedure for the Purification Efficiency of Exhaust Gas with Adjustable Light Height: First, the prepared road material sample with photocatalytic function is placed inside the reaction chamber 1, and the transparent cover is closed to ensure the reaction chamber is sealed. Then, by adjusting the extension length of the adjustable telescopic rod 4, the ultraviolet xenon lamp 5 is adjusted to the preset initial height position, so that it faces the material surface. The valve of the exhaust gas storage bottle 6 is opened, and the flow rate of exhaust gas into the reaction chamber 1 is precisely controlled by the flow meter. After the airflow stabilizes, the initial exhaust gas concentration measured by the gas detector 8 is recorded as baseline data.

[0043] Next, close the valve leading to the exhaust gas treatment box 7, open the valve connected to the gas detector 8, and start the gas detector 8 for real-time monitoring. Turn on the ultraviolet xenon lamp 5, and the photocatalytic material begins to catalyze the degradation of pollutants in the exhaust gas under ultraviolet light irradiation. The gas detector 8 continuously collects data on changes in exhaust gas concentration until the concentration value tends to stabilize (i.e., the degradation reaction reaches equilibrium). At this point, record the final purification efficiency and close the valve of the gas detector 8.

[0044] Subsequently, the adjustable telescopic rod 4 was adjusted to different telescopic lengths to change the distance between the ultraviolet xenon lamp 5 and the material, thereby enabling repeated tests under different light intensities and recording the purification data under each working condition to analyze the influence of light intensity on catalytic efficiency.

[0045] After all tests are completed, the exhaust gas storage bottle 6 and its valve, the gas detector 8 valve are closed in sequence, and the exhaust gas treatment box 7 valve is opened to allow the residual exhaust gas to be safely treated by the multi-stage adsorption layer before being discharged, ensuring that the experimental process is environmentally friendly and safe.

[0046] II. Test Procedure for Exhaust Gas Purification Efficiency with Adjustable Light Angle: Based on the above, this process involves sliding the adjustable telescopic rod 4 along the arc-shaped track 2 and adjusting its installation angle to change the incident direction of the ultraviolet xenon lamp 5, thereby simulating the lighting conditions under different solar altitude angles or road orientations. The remaining operation steps (including material placement, exhaust gas introduction, concentration monitoring, ultraviolet lamp activation, data recording, and exhaust gas treatment) are completely consistent with the light height adjustment test.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for testing the exhaust gas purification efficiency of photocatalytic road surface materials, characterized in that: It includes a reaction chamber (1), an arc-shaped track (2), a test platform (3), an adjustable telescopic rod (4), and an ultraviolet xenon lamp (5), among which, The reaction chamber (1) is located on top of the test bench (3); The arc-shaped track (2) is mounted above the reaction chamber (1), and its two ends are fixedly connected to the test platform (3); One end of the adjustable telescopic rod (4) is slidably mounted on the arc-shaped track (2) and its position on the arc-shaped track (2) can be locked by fasteners; The other end of the adjustable telescopic rod (4) is fixedly connected to the ultraviolet xenon lamp (5), and the ultraviolet xenon lamp (5) faces the interior of the reaction chamber (1).

2. The device for testing the exhaust gas purification efficiency of photocatalytic road surface materials as described in claim 1, characterized in that: The bottom surface of the arc-shaped track (2) is provided with a T-shaped track groove (201), and one end of the adjustable telescopic rod (4) is provided with a T-shaped slider (44). The T-shaped slider (44) is located inside the T-shaped track groove (201); The adjustable telescopic rod (4) is provided with a nut seat (45) on its side, and a second bolt (46) is screwed onto the nut seat (45). One end of the second bolt (46) abuts against the bottom surface of the arc-shaped track (2).

3. The device for testing the exhaust gas purification efficiency of photocatalytic road surface materials as described in claim 2, characterized in that: The adjustable telescopic rod (4) is a pneumatic cylinder or an electric cylinder, wherein, The cylinder body of the cylinder or electric cylinder is provided with the T-shaped slider (44) and nut seat (45).

4. The device for testing the exhaust gas purification efficiency of photocatalytic road surface materials as described in claim 2, characterized in that: The adjustable telescopic rod (4) includes an inner rod (41), an outer cylinder (42), and a first bolt (43), wherein, One end of the inner rod (41) is slidably disposed on the inner side of the outer cylinder (42) along the axial direction, and the other end is fixedly connected to the ultraviolet xenon lamp (5). The first bolt (43) is screwed to the side of the outer cylinder (42), and one end of it abuts against the side of the inner rod (41); The outer cylinder (42) is provided with the T-shaped slider (44) and the nut seat (45).

5. The device for testing the exhaust gas purification efficiency of photocatalytic road surface materials as described in claim 1, characterized in that: The reaction chamber (1) is a transparent glass box.

6. The device for testing the exhaust gas purification efficiency of photocatalytic road surface materials as described in claim 1, characterized in that: The reaction chamber (1) is equipped with a transparent lid on top.

7. A device for testing the exhaust gas purification efficiency of photocatalytic road surface materials as described in any one of claims 1 to 6, characterized in that: The reaction chamber (1) is equipped with a tail gas inlet pipe (11) and an exhaust gas outlet pipe (12), wherein, The exhaust gas inlet pipe (11) is connected to the exhaust gas storage bottle (6) via a pipe. The exhaust pipe (12) is connected to the external exhaust gas treatment box (7) and the external gas detector (8) respectively via a tee.

8. The device for testing the exhaust gas purification efficiency of photocatalytic road surface materials as described in claim 7, characterized in that: Both the exhaust gas inlet pipe (11) and the exhaust gas outlet pipe (12) are equipped with valves.

9. The device for testing the exhaust gas purification efficiency of photocatalytic road surface materials as described in claim 7, characterized in that: A flow meter is installed on the exhaust gas inlet pipe (11).

10. The device for testing the exhaust gas purification efficiency of photocatalytic road surface materials as described in claim 7, characterized in that: The waste gas treatment box (7) has at least three adsorption layers inside.

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