Able to filter above 80% carbon smoke  particulate,it would be a great help to solve the problem of air pollution in city.

1.Features

1)Large and compact area per unit volume.
2)Small pressure loss and excellent capturing performance.
3)Excellent heat resistance and heat shock resistance.

With increasing appearance of diesel engine automobile, the particulate from emission, mainly carbon, enhances the pollution to the enviroment. The US enviromental office promulgated the particulate regulation for diesel engine, stipulating the particulate in diesel passenger car's emission should meet the criterion :below2.0g/mile. The diesel particulate filter is able to filter above 80% carbon smoke  particulate .For practical  application, it would be a great help to solve the problem of air pollution in city.

2. Basic working principle

If the DPF is coated with noble metal (such as Pt, Pd and Rh), black smoke with carbon particulate from diesel engine ,pass through a special tube and enter the filter. The carbon smoke particulate is absorbed to the filter made of metallic fibre felt, when passing the inner dense set and bag-style filter. when particulate absorption reaches some degree, the tail burner would be ignited to burning automatically. In this case, the particulate absorbed is burned out and turned into nontoxic co 2 then discharge. The full device is designed as double room structure, and filtration and recycle are going in different areas, making them non-disturbed. The system can work automatically whatever working condition the engine in. specially made honeycomb ceramic particulate filter, acts as capturing device to the particulate to some extent.

3.Physical and chemical performance for Diesel Particulate filter

If the DPF is coated with noble metal (such as Pt, Pd and Rh), The particulate of emission is captured inside thin gas hole or entrance. As it lasts, the cumulated layer becomes thick, and pressure loss increases. To ensure the performance of engine, when pressure loss reaches some value, it is a must to recycle the filter. The recycle is making the particulate burning, by raising the gas temperature of filter.

The particulate condition is related to the oxygen concentration. Normally, it is burning at 550-650 ℃ .It's adopted to raise emission temperature by adjusting throttle, and increase gas temperature with burner. The particulate burning temperature can be decreased by catalyzer, making cumulative particulate burning as soon as possible, thus recover the pressure loss and fitter's performance, then the filter is recycled.