The low-temperature plasma is rich in highly active charged particles and free radicals and accompanied by a strong short pulse autogenic electric field

showing great advantages in the field of waste gas treatment. The plasma waste gas treatment device has the advantages of low investment

simple process

fast treatment speed and high degradation efficiency. Based on the principle of dielectric barrier discharge

a columnar array plasma reactor with circulating water electrode is designed in this paper

and a plasma characteristics experimental platform is built to study the optical and electrical characteristics of DBD at different voltage amplitude and different discharge unit number

including voltage and current waveform

harmonics

discharge power

discharge images

emission spectra

etc. The results show that with the increase of voltage amplitude

the number of current pulses increases obviously

the even harmonic content gradually decrease to disappear

the discharge became more uniform

the relative intensity of emission spectrum and characteristic spectral line increases

and the vibration temperature of nitrogen molecule increases. The discharge power increases with the increase of voltage and the number of discharge units

and the reactive power is negative. The research results provide a reference for optimizing the operating parameters of the plasma reactor and improving the actual treatment effect of large flux VOCs.