Air purification device and method based on ultraviolet laser and TiO2 photocatalysis

Abstract

The invention discloses an air purification device and a method based on ultraviolet laser and TiO2 photocatalysis. The air purification device comprises an ultraviolet laser, a spectroscope, a beam expander group, a turning light path assembly and a purification chamber, a TiO2 net is arranged in the purification chamber; the purification chamber is divided into a first chamber and a second chamber through a TiO2 net; the first chamber and the second chamber are crossed and vertically communicated; the first chamber is positioned at the horizontal section of the purification chamber; the second chamber is positioned at the vertical section of the purification chamber; wherein the end surface of the first chamber is provided with a first transmission window, the inner end surface paralleland opposite to the first transmission window is provided with a first reflection wall, the inner side surface of the first chamber is provided with a second reflection wall, and the end surface parallel and opposite to the TiO2 net, of the second chamber is provided with a second transmission window. The laser utilization rate is high, the laser beams in the first cavity are infinitely reflected,oscillated and superposed through the first reflecting wall and the second reflecting wall, and no less than 70% of laser is used for disinfecting air.

Description

technical field [0001] The invention relates to the technical field of air disinfection and purification, in particular to a method based on ultraviolet laser and TiO 2 Photocatalytic air purification device and method. Background technique [0002] With the global outbreak of new crown pneumonia, rapid and efficient disinfection and sterilization technology has become a shortage technology, especially in the field of air anti-virus purification technology, the public is more interested in hospitals, waiting halls, shopping malls and other open spaces and high-speed rail, aircraft, conference rooms The safety requirements of air in confined spaces are getting higher and higher. At the same time, the air pollution brought about by the accelerated development of modern industrialization and urbanization has always troubled human beings. Therefore, there is an urgent need for a new technology that can reduce the harm of severe infectious diseases such as the new crown pneumoni...

AI Technical Summary

Problems solved by technology

However, the pulsed strong light in the patent has a working frequency limit, and TiO 2 It needs to be continuously irradiated by light to work all the time, and there will be omission of air to be disinfected in the flowing air, resulting in incomplete disinfection

Secondly, the pulsed strong light band covers ultraviolet to near infrared, and only the band below 385nm can catalyze TiO 2 The production of bactericidal substances does not give full play to the advantages of photocatalysts, so the actual use value of this patent is limited, and the effect of air disinfection and purification is not obvious

Chinese patent CN107176648A discloses a photocatalyst purifier, the main purpose is to utilize TiO 2 The photocatalyst can purify the polluted organic matter in the air, but it can’t carry out good disinfection and sterilization, because TiO 2 The way the net interacts with organic matter is contact type, the reaction time is about tens of minutes, only TiO2 is used 2 The air sterilization rate of the net is very limited, and the ultraviolet lamp is irradiated on the TiO 2 The light intensity of each position (edge ​​and center) of the net is different, TiO 2 There is a gap between the net and the light reflection layer, which will cause different purification effects in each position and purification blind spots, and the purification effect cannot be guaranteed

Chinese patent CN111495183A discloses an air purification processor, which uses energy-saving lamps or LED ultraviolet lamps to excite photocatalytic materials for air purification, but energy-saving lamps or LED ultraviolet lamps have limited excitation effects on photocatalytic materials, and the utilization rate of light is not high

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