DBD技术处理鱼粉厂恶臭气体的研究

Study on the Malodorous Gas in Fish Meal Processing Removal by DBD Technique

为了去除鱼粉加工中产生的大量恶臭气体,利用DBD低温等离子体技术对硫化氢和三甲胺进行去除,并在单因素试验的基础上,采用Box-Behnken设计方法,考察了电压、放电频率、处理时间、初始浓度及其交互作用对硫化氢和三甲胺去除率的影响。结果表明,响应面法优化所得的最佳工艺条件为:电压10.6k V,放电频率8.91KHz,处理时间0.26s,硫化氢初始浓度0.76mg·m-3,三甲胺初始浓度为19.8mg·m-3。此条件下硫化氢和三甲胺的去除率均可达100%,能耗为1.77×10-2KW·h·m-3;同时,验证试验结果与模型预测值吻合。本研究为DBD技术在鱼粉厂去除恶臭气体中的应用奠定了基础。

In order to remove the malodorous gas generated in fish meal processing,the malodorous gas purified by DBD technique from the perspective of practical application was studied in this paper. The effects of the voltage,frequency,gas residence time,and their interaction on the removal rate of hydrogen sulfide（ H2S） and trimethylamine（ TMA） were studied with Box-Behnken design based on single-factor experiment. Results showed that the optimal extraction conditions were voltage 10. 6k V,frequency 8. 91 KHz,gas residence time 0. 26 s,at 0. 76mg·m- 3and 19. 8mg·m- 3of H2 S and TMA. On this condition,the removal rale of H2 S and TMA can reach 100%,and the energy consumption was 1. 77 ×10- 2KW·h·m- 3. Experiment results were matched with the model predicted value. This study laid a foundation for the application of DBD technology to remove malodorous gas in fish meal factory.