关键词: 复合式油烟净化器, 净化效率, 放电电流, 臭氧浓度

Abstract: With the rapid development of catering industry in China,a large number of cooking fumes containing harmful gases and carcinogens have been emitted directly into the air,which need to be treated urgently. However,the purification efficiency of traditional methods is low and cannot meet the emission standard. To solve this problem,a composite cooking fume purifier was developed using technologies of centrifuge,filtration,corona discharge and photolysis. The purification efficiency,discharge current,and ozone concentration were studied. The results showed that when using the technologies of centrifuge,filtration and corona discharge,the purification efficiency was the most stable and kept about 95% with the increase of working hours. When there were filter layers,the discharge current in the electrostatic section decreased slowly over time,and it was more slowly at the negative corona discharge at the same voltage. When there was electrostatic section,the ozone concentration of cooking fume purifier was the highest,and it decreased most slowly after adding filter layers. Overall,the filtration technology could effectively improve the purification efficiency,slow down the decline of discharge current and ozone concentration.

Key words: cooking fume composite purifier, purification efficiency, discharge current, ozone concentration