Back flushing regeneration device of diesel particulate filters

Abstract

The invention discloses a back flushing regeneration device of diesel particulate filters and belongs to the engine emission and pollution control field. The back flushing regeneration device particulate ly comprises two filters, shells of filters and back flushing airflow pipes, wherein the exhaust end of one of two filters is communicated with that of the other filter through the back flushing airflow pipes; by adopting a crossover control strategy, one part of engine exhaust gas is guided into one of two filters through an exhaust gas inflow pipe, and the other part of engine exhaust gas is guided into the tail end of the other filter for back flushing regeneration through a back flushing airflow pipe; two filters operate and regenerate by turns, corresponding control valves are respectively installed on the tail ends of the back flushing airflow pipe and the tail gas inflow pipe, and opening and closing of the back flushing airflow pipe and the exhaust gas inflow pipe can be crosswise controlled, so that the filters can realize automatic back flushing by adopting engine exhaust gas, and the filters can gather and regenerate particulates by turns.

Description

technical field [0001] The invention belongs to the field of engine emission and pollution control, and in particular relates to an automatic blowback regeneration device for a diesel engine particulate trap realized by using a sensor detection technology and a valve control strategy. Background technique [0002] It is estimated that by 2050 there will be 3 billion cars in the world. Since the beginning of the 21st century, the demand and stock of automobiles in our country have also shown a trend of accelerated growth. Diesel engines are widely used in industry, agriculture, transportation and other industries because of their high thermal efficiency and relatively large torque. However, compared with gasoline engines, diesel engines have lower HC and CO in exhaust emissions, but NOx and particulates. Emissions are higher, especially particulate emissions are 30-60 times higher. At the same time, since soot is the main component of diesel engine particulates, often accou...

AI Technical Summary

Problems solved by technology

The regeneration of the filter body is divided into active regeneration and passive regeneration. Active regeneration mainly includes thermal regeneration and back-blowing regeneration. Thermal regeneration needs to apply additional heat to the filter body to reach the combustion temperature of the particles to oxidize the particles to achieve the regeneration of the filter body. The energy utilization rate The structure is relatively low and the structure is complex. Traditional backflush regeneration requires the installation of air sources and power equipment. How to simplify the backflush regeneration equipment to achieve the purpose of regeneration has become a key issue in backflush regeneration.

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