드라이아이스 분사 충격량 평가를 통한 DPF 재생조건 도출 및 성능평가 = Estimation and Performance Evaluation of DPF Regeneration Conditions by Evaluating the Impulse of Dry Ice Spray

다국어 초록 (Multilingual Abstract)

This study aims to develop a cost-effective regeneration technology for diesel particulate filter (DPF) used to remove particulate matter (PM) emitted from diesel engines of island power plants, as existing regeneration technologies (thermal and chemical methods) have problems (cost and wastewater) due to the characteristics of the island areas. Therefore, the impulse of dry ice spray technology, which can be applied in the field by spray condition was compared and evaluated. Damage to the surface or pores of a DPF during the cleaning process can decrease the PM removal efficiency. Therefore, deriving appropriate regeneration conditions is necessary. An impulse of dry ice spray should not exceed an impulse resistance of 258 gf, as analyzed. The optimal dry ice spray condition was 6 bar of injection pressure, 50 mm of spray distance, 0.5 mm of dry ice diameter, and 1 kg/min of injection rate. When dry ice was sprayed on the discharged DPF after driving at the island power plant for 2,000 hr, the back pressure was regenerated from 100 to 6.6 mbar. CT imaging of regenerated DPF confirmed that only pollutants were removed without internal damage. Additionally, dry ice regeneration technology was the fastest, taking only 60 seconds compared to back-blowing and heat regeneration. The results of this study confirm the efficiency and cost-effectiveness of waste DPF regeneration technology using dry ice to other technologies.