Segmented Sampling System for Particles of Different Particle Sizes in Engine Exhaust

Abstract

The invention discloses a sectional sampling system of particles with various particle sizes in engine exhaust gas and aims at solving the problem that in the prior art, a device which performs sectional collection of exhaust gas particles according to the particle sizes is absent. The sectional sampling system comprises an exhaust gas dilution system, a current stabilizer, an electrifying device and a sectional collection device of exhaust gas particles, wherein the exhaust gas dilution system is a secondary dilution system and connected with the current stabilizer; the current stabilizer comprises a pressure stabilizing chamber, a stabilizer and a constant current nitrogen tank; the stabilizer is arranged in the middle of the pressure stabilizing chamber; the pressure stabilizing chamber and the constant current nitrogen tank are separately connected with the sectional collection device of exhaust gas particles; the electrifying device comprises a discharge needle and a high voltage power source; the discharge needle is arranged in a hole in the center of the current stabilizer; the sectional collection device of the exhaust gas particles comprise an insulation current guide pole arranged at the internal of a system shell, a central electrode pole and a glass fiber filter paper; the upper end of the central electrode pole is attached to and fixed at the lower end of the insulation current guide pole; the lower end of the central electrode pole is fixedly connected with a metal base; the system shell is fixedly connected with the base and is grounded through a wire.

Description

technical field [0001] The invention relates to a device in the field of emission control of internal combustion engines, more precisely, the invention relates to a segmented sampling system for particles with different particle sizes from engine exhaust. Background technique [0002] Engine particulate emissions have increasingly become a factor that reduces environmental quality and affects human health. Engine particulate emissions are harmful to the human body. Soluble organic components (SOF), such as benzene, aromatic hydrocarbons, olefins and other strong carcinogens, will penetrate into the alveoli of the human body with fine particles, and have a toxic effect on human tissues. [0003] The degree of harm of particles of different particle sizes to the human body is very different, because: 1. The soluble organic components contained in particles of different particle sizes are very different; 2. The morphology of particles of different particle sizes is quite differ...

AI Technical Summary

Problems solved by technology

However, at present, there is a lack of sufficiently accurate analysis of the morphology and chemical composition of particles in each particle size segment. The reason is that there is a lack of relevant devices for collecting exhaust particles in segments according to particle size.

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