Hefei: DPF reduces diesel emissions by 95%
Recently, the reporter learned from Hefei University of Technology that Prof. Liu Wei, a special expert of the "Thousand People Project" of the school's School of Mechanical and Automotive Engineering and his research team successfully developed an active regeneration diesel exhaust particulate trap system with complete independent intellectual property rights. The acronym DPF) can reduce the emission of major pollutants from diesel engines by more than 95%.
"China's direct calculation of PM2.5 emission from vehicles is conservatively estimated to be about 30% of the total number of particles." Liu Yan said that the particulate matter emitted by diesel engines accounts for more than 85% of the total amount of particulate matter emitted by motor vehicles. It can be described as the exhaust of motor vehicles. The "number one culprit" of emissions.
After several years of research, the research team used the active regeneration technology DPF system to modify the exhaust system of the diesel engine and use wall-flow filter channel carriers made of high-porosity materials such as cordierite honeycomb ceramics or carbonized silicon to collect exhaust gas. The particulates in the vehicle “intercept†the particulate matter in the vehicle exhaust before it is discharged into the air. When the “intercepted†particles are filled to a set level, the particulates collected are burned through specially designed recycling equipment to produce carbon dioxide. In this way, the trap can resume its filtration function for recycling, so as to achieve long-term effective removal of particulate emissions from the exhaust.
"This is equivalent to wearing a 'mask' for the exhaust pipe, and the 'mask' itself can be recycled." Liu Ye said that the technology also has a short regeneration time, no requirements on fuel quality, no work on the engine Impact and other advantages.
According to calculations, only the exhaust system upgrade of more than 5,000 highly polluting vehicles in the public transport system in Anhui Province can reduce particulates by 439.5 tons per year. At present, this technology has been applied on the JAC Refine commercial vehicles and some buses in Chizhou. After adopting this technology, the exhaust noise of the vehicle is significantly reduced, and the phenomenon of black smoke disappears while driving.
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