Resarch On Designing Air-cleaning Device Of UV Photolysis United Ozone Catalytic And Effection

Nowadays city residents spent most of the time in various indoor environments. Inconstruction, decoration, and all kinds of work process, there was a large number ofVOCs volatile, which did serious harm to human health and must be solved.In this paper, Vacuum ultraviolet lamp which is made by studying team was electedas ultraviolet light source. Through the comparison the UV-photolysis Joint ozonecatalytic process was relatively elected for the removal process; in order to improve theprocess integration removal effect, UV-photolysis process and ozone catalytic processwere optimized, and UV-photolysis process of the shape, size, material reflective effectof the reactor were optimized. For ozone catalytic process catalyst and carrier selection,load of the catalyst and thickness of the carrier were optimized. This paper containedthe research of toluene initial concentration, mixture flow, relative air humidity and soon influence factors of the optimized ultraviolet solution process to remove the effectsof toluene; at the same time it also contained the study of toluene initial concentration,mixture flow, ozone concentration of the factor of ozone catalytic process for the effectof removing toluen. Finally, the joint process of toluene removal, small scale combinedprocess of benzene and formaldehyde removal were studied.Ultraviolet solution process reactor optimization research showed that，when theshape of the reactor was cylindrical, reactor diameter was300mm, the length was500mm, mixture flow was4m~3/h, and material reflected better remove toluene, thebetter results were for toluene removal.Ozone catalytic process optimization research showed that, Manganese dioxidewas catalytic decomposition of ozone best catalyst; According to the requirement ofcarrier final choice of4mm diameter column woodiness active carbon as the carrier;through the different load of catalyst removal effect comparison, concluded that5%wasthe best, and4cm thick carrier was the best thickness.Research showed that, the optimized ultraviolet solution process on the removalrate of toluene with toluene initial concentration(5ppm-30ppm) and mixture flowincrease(2m~3/h-7m~3/h) and reduce, along with the relative humidity of theair(47.3%-74.3%) increased. The optimized ozone catalytic process on the removal rateof toluene with toluene initial concentration and mixture reduced with the increase ofthe flow rate, along with the increase of ozone concentration.Process integration of toluene, benzene and formaldehyde removal researc hshowed that, mixture flowwas4m~3/h, air relative humidity is83.8%-85.4%, tolueneinitial concentration was5ppm-30ppm, toluene removal rate was55.4%-100%, toluene removing quality rate was82.1mg/h-285.0mg/h; Benzene initial concentration was5ppm-30ppm, benzene removal rate was39.3%-94.3%, benzene removal rate of qualitywas77.4mg/h-209.9mg/h; When the concentration of formaldehyde was30ppm,formaldehyde removal rate was96.3%.