A variable voltage coagulation device for controlling the number of micro-nano particles

Abstract

The invention discloses a variable voltage coagulation device for controlling the quantity of micro-nano particles, which comprises a particle charging cylinder, a particle coagulation cylinder, a Faraday cylinder and a particle trap, and the front end of the particle charging cylinder is connected with an exhaust gas , the rear end is connected to the particle coagulation cylinder, and the rear end of the particle coagulation cylinder is connected to the Faraday cage and then connected to the particle trap. The present invention utilizes the charging coagulation technology, and realizes the coagulation of exhaust particles through the means of bipolar high-voltage charging and coagulation, and realizes the reduction of the particle number concentration while increasing the particle size, further improves the collection efficiency of the particle filter, and reduces the Particle mass discharge; the present invention connects particle surface charge measurement with high-voltage electric field control, realizes the most suitable range control of charging voltage, and reduces high-voltage power supply energy consumption; in the present invention, dual temperature sensors and dual mass flowmeters can be discussed The influence of charging voltage and exhaust temperature on the charging and coagulation of particles, and the research on the efficiency of particle traps.

Description

Technical field[0001]The present invention relates to the field of diesel engine exhaust treatment, in particular a variable voltage condensed device for controlling the number of micro-nano-stage particles in the exhaustural internal combustion engine exhaust gas.Background technique[0002]Modern diesel engines have the advantages of high thermal efficiency, powerful and reliable operation, extensive applications in vehicles and construction machinery, but their emissions have great harm to the air environment with human health. Modern diesel engines reducing particle emissions by improving the combustion of the diesel engine cylinder and the addition of the post-processing device, such as improving the fuel injection system and the cylinder combustion optimization, while coupling the particle trap to reduce diesel particulate matter, but DPF against small particle diameter particles The set efficiency is very low, especially in the six-regulations of diesel engine, the limit of the...

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Problems solved by technology

Modern diesel engines reduce particulate emissions by improving diesel engine cylinder combustion and adding after-treatment devices, such as improving fuel injection systems and in-cylinder combustion optimization, while coupling particulate traps to reduce diesel engine particulate emissions, but DPF captures small particles The collection efficiency is very low, especially the restriction on the number concentration of exhaust particles proposed in the National VI regulations of diesel engines, which makes the treatment of small particle size particles more important

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