反电晕强化低温等离子体技术处理含甲醛废气

Treatment of formaldehyde-containing exhaust with back corona enhanced non-thermal plasma technology

针对室内和工业中游离甲醛污染问题,在传统电晕放电的基础上,采用反电晕强化低温等离子体技术降解含甲醛废气以去除污染.分析了电极针数和放电间距对反电晕放电特性的影响,并探究了不同参数对含甲醛废气降解效率的影响.结果表明,当放电间距为30 mm、电极针数为10针时,反应器放电稳定且处理效果最佳.在反电晕放电条件下,随着放电电压的升高,放电电流相对电晕放电时增加得更加迅速,甲醛去除率也不断提高,当电压达到32 kV时,甲醛去除率达到57.4%.

Aiming at the indoor and industrial pollution with free formaldehyde,based on the traditional corona discharge,the formaldehyde-containing exhaust was degraded with the back-corona enhanced non-thermal plasma technology to remove pollution.The effect of electrode needle number and discharge distance on the characteristics of back-coronadischarge was analysed,and the influence of different parameters on the degradation efficiency of formaldehyde-containing exhaust was studied.The results show that when the discharge distance is 30 mm and the electrode needle number is 10 pins,the reactor can stably discharge with the optimum treatment effect.Under the condition of back-corona discharge,the discharge current increases more rapidly than that under the condition of corona discharge with the increasing discharge voltage,and the formaldehyde removal rate continuously increases.When the voltage is 32 kV,the formaldehyde removal rate reaches 57.4%.