空气源高频圆管型DBD臭氧产生的实验研究

Experimental study on ozone generation using high-frequency coaxial-cylinders DBD in dry air

电源频率和放电管长度是介质阻挡放电(DBD)臭氧产生的两个重要影响因素,在前期的研究基础上,采用合适的放电管长度和电源频率进行实验研究。实验研究了干空气源放电管长度、放电电压和气体流量对臭氧产生的影响,并进行了系统优化。研究结果表明:放电管长度由500 mm变为200 mm,在几乎不降低臭氧浓度下放电平均功率约降低了60%;臭氧浓度随放电电压和气体流量的增大先增大后降低;当流量为200 L/h、放电电压为2 698 V时,臭氧浓度与臭氧产率同时达到相对较高值,此时,臭氧浓度为5.3 g/m3时,臭氧产率为43.62 g/kWh。

The power frequency and the length of discharge tube are two important factors for achieving high-efficiency ozone generation. The experiments were carried out to study the effects of discharge tube length, discharge voltage and gas flow on ozone concentration using proper high-frequency high-voltage power and discharge tube length, and to optimize the system of ozone generation. The results show that the average discharge power reduces by 60%, meanwhile ozone concentration remains nearly constant when the discharge tube length changes from 500 mm to 200 mm. Ozone concentration increases first and then decreases with the increase of both discharge voltage and gas flow rate. The relatively higher ozone concentration and ozone production efficiency are 5.3 g/m3 and 43.62 g/kWh, respectively, at gas flow rate of 200 L/h and discharge voltage of 2 698 V.