Exhaust gas purification technology: Integrated application of DPF and SCR systems


Release time:

2024-06-06

With the increasingly strict environmental regulations, DPF and SCR technologies are widely used in diesel engine emission control. DPF reduces particulate emissions through physical filtration, while SCR reduces nitrogen oxides using urea solution. Integrated equipment saves space costs, collaborates to improve efficiency, and provides efficient, economical and environmentally friendly solutions for the environmental protection field.

With the increasingly strict environmental regulations, the national requirements for diesel engine emissions are becoming higher and higher, DPF (particle filter) and SCR(selective catalytic reduction) technology as an effective means to reduce diesel emissions of pollutants, has been widely used in the industrial field.

Black smoke and nitrogen oxides (NOx) produced by diesel engines during combustion pose a serious threat to the environment and human health. In order to meet strict emission standards, DPF and SCR technologies came into being to control the emission of particulate matter PM and nitrogen oxides.

DPF is a device installed in the diesel engine emission system, which is used to capture and store particulate matter in the exhaust, and effectively reduce the emission of particulate matter through physical filtration. According to the characteristics of the exhaust gas of the internal combustion engine, the DPF carrier adopts modular, customized design and professional fluid mechanics design (the exhaust gas can pass through the filter element 360 degrees), and the unit can be easily disassembled. It can be flexibly extracted and washed for regeneration, easy and fast maintenance, and the particle catcher box is made of stainless steel, with long service life and 10-15 dB noise reduction function. The black smoke treatment efficiency is 90%-98%. And set a safety bypass, when the blockage caused by high back pressure alarm can automatically open the bypass, to ensure safe use. After many years of iteration, the functionality of the product has been very stable, can be suitable for any engine condition, easy regeneration, and the treatment efficiency of particles in the exhaust gas is 95%.

An SCR system is a post-treatment technology that reduces NOx emissions by spraying a reducing agent (usually a urea solution) in the exhaust stream to reduce nitrogen oxides to nitrogen and water in the presence of a catalyst. SCR systems require precise temperature control and reducing agent injection to ensure efficient conversion rates. SCR denitration system can match any type and any power of internal combustion engine, fuel oil, gas, biogas, biomass gas, gas, hydrogen, coke oven gas, generator set, boiler, kiln, quenching furnace, annealing furnace, etc., easy operation and maintenance, unit module design, easy maintenance and replacement of catalysts, control logic, parameter calibration, can be solved in the field human-machine interface. In Europe, the United States have supporting service personnel to provide technical support.

Advantages of integrated equipment:

1, space saving: Integrating DPF and SCR into one device can save installation space and simplify the layout of the exhaust system.

2, cost savings: integrated design to reduce additional pipes and connectors, reduce manufacturing and maintenance costs.

3. Collaborative cooperation: DPF particle catcher can be used as catalyst carrier in SCR system to improve catalytic efficiency.

4, through the integrated control system, to achieve the precise control of DPF regeneration and SCR reducing agent injection.

The integrated equipment of DPF particle catcher and SCR denitration system provides an efficient, economical and environmentally friendly solution for the emission control of internal combustion engines, furnaces and boilers. With the continuous progress and innovation of technology, this integrated equipment is expected to play a greater role in the field of environmental protection in the future, contributing to the realization of clean energy and green travel.