Indoor and outdoor detection device for photocatalytic degradation of exhaust gas of road surface

Abstract

The invention relates to an indoor and outdoor detection device for photocatalytic degradation of exhaust gas of a road surface. The detection device comprises an automobile exhaust gas supply device,a reaction box body, a light source and an energy system thereof and a gas analysis device. The exhaust gas supply device is composed an HC pure gas storage tank, a CO pure gas storage tank and an NOX pure gas storage tank, and the reaction box body is made of high-transmission polymethyl methacrylate, sealed with a thin layer of the road surface through a cushion block and a sealant and internally provided with a micro fan which is fixed by a sucker. A fence structure is designed on a top plate, a water pump is adopted for circulated water supply through a water inlet and a water outlet. A light source device comprises two ultraviolet high-pressure mercury lamps, a reflector and two fans and is placed on a lifting bracket. The gas analysis device is designed on the basis of chemiluminescence. The detection device can adapt to indoor and outdoor photocatalytic detection of the exhaust gas of the road surface, a special material is adopted for sealing the box body and the road surface,on-site detection does not damage the performance of the road surface, a Marshall rutting plate can be placed in the reaction box body during an indoor test, and the test range is wide. The detectiondevice can control various reaction conditions of a catalytic degradation reaction and has high practicability.

Description

technical field [0001] The invention relates to the field of performance detection of road engineering materials, and relates to an indoor and outdoor detection device for photocatalytic road tail gas degradation, which can be used to evaluate the degradation efficiency of automobile tail gas on photocatalytic road surfaces. Background technique [0002] Photocatalysts for roads degrade automobile exhaust pollutants under ultraviolet light irradiation, and can rely on water flow to restore photocatalytic degradation capabilities. In recent years, they have been widely used in road materials and are called green roads. However, there is no unified method and device for testing the degradation of automobile exhaust by photocatalytic materials. Most of the devices designed by domestic and foreign scholars are only suitable for indoor detection, and the devices for outdoor detection also have many shortcomings. [0003] At present, the material of photocatalytic devices at home ...

AI Technical Summary

Problems solved by technology

However, there is no uniform method and device for the test of photocatalytic material degradation of automobile exhaust. Most of the devices designed by domestic and foreign scholars are only suitable for indoor detection, and the devices for outdoor detection also have many shortcomings.

[0003] At present, the material of photocatalytic devices at home and abroad is steel, which is opaque. As a result, only an artificial ultraviolet light source can be built in the reaction box for testing, but the artificial ultraviolet light source also generates a large amount of heat while producing ultraviolet radiation, resulting in During the test, the temperature of the exhaust in the reaction box has been rising; in the past, the artificial light source device used a certain number of LED lamps and short-arc xenon lamps, and its defect was that it could only measure the degradation test under a specific ultraviolet light intensity; the road surface The cross slope is about 2%. When the parabolic cross slope is used, when the reaction box is placed on the road, it is difficult to seal with the road and make the exhaust gas contact with the outside air. This leads to an increase in the systematic error of the degradation test test, and it is also a low-concentration degradation of the outdoor exhaust gas. Reasons for Test Trial Failures

[0004] All in all, the airtightness, reactant concentration, temperature, ultraviolet light intensity and other reaction conditions of the current photocatalytic degradation detection device cannot be effectively controlled, resulting in low reliability of indoor and outdoor degradation test results

[0005] At present, there is no reasonable equipment for the outdoor test of photocatalyst roads, and the test of the effect of photocatalytic materials on the degradation of exhaust gas cannot be fully combined with outdoor tests, resulting in large errors in laboratory and field tests.

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