Experimental Study On The Degrading Formaldehyde By Intensive Pulsed Light Under Different Characteristic Parameters

With the increasing concern about the indoor air quality,the research and development of new air purification technology have received growing interests in recent years.Intensive pulsed light technology has been extensively studied as promising methods for sterilizing and removing VOCs in air contamination.However,there are little researches oon characteristic parameters of pulsed light device in recent years,and most researches only focus on the influence of environmental parameters on the removing effect by intensive pulsed light.Therefore,in this paper,the theoretical analysis and experimental methods are used to investigate the purification performance of formaldehyde by pulsed xenon lamp under different characteristic parameters.Firstly,this paper used formaldehyde as the object,set up a set of duct experimental system,and investigated the purification performance by pulsed xenon lamp with three different arc lengths under different input voltages and capacitor capacities;at the same time,in order to study the influence of types of capacitor on the purification performance,the electrolytic capacitors and the thin-film capacitors were chosen as the experimental subjects,and the total of experiments were 44 groups.Secondly,this paper analyzed the influence of different characteristic parameters on the spectral characteristics and purification performance of pulse xenon light according to the experimental data.The results show that: different different characteristic parameters,including capacitor capacities,capacitor types,input voltages and arc lengths,affect the spectral characteristics and purification performance of intensive pulsed light,among them,the capacitor types,which affects the distribution and intensity of the output spectra of xenon lamp,make the most significant difference,and the thin film capacitor should be chosen as the energy storage capacitance in pulsed light device;arc length impacts the intensity of the output spectra of xenon lamp,the short arc xenon lamps have a good performance on the radiation efficiency,output of UV energy and purification,but they cannot withstand high input voltage;the input voltage and capacitor capacity only have a effect on the intensity of the output spectra of xenon lamp,with the increasing of input voltage and capacitor capacity,the radiation efficiency and purification performance of the pulse xenon lamp increase.Finally,this paper made a comprehensive analysis on the relationship between the output of UV energy and purification performance by pulse xenon lamp,and compared with purification performance by UV lamp.The results show that: purification performance by pulse xenon lamp is significantly related to the output of UV energy,which presents a quadratic function relation with the UV energy with the one-time purification efficiency;with the same input power,pulse xenon lamp has a significantly stronger than the UV lamp on purification performance.