Variable voltage agglomeration device for controlling quantity of micro-nano particles

Abstract

The invention discloses a variable voltage agglomeration device for controlling quantity of micro-nano particles. The variable voltage agglomeration device for controlling the quantity of the micro-nano particles comprises a particle charging cylinder, a particle agglomeration cylinder, a faraday cylinder and a particle trap, wherein the front end of the particle charging cylinder is connected with exhaust, the rear end of the particle charging cylinder is connected with the particle agglomeration cylinder, and the rear end of the particle agglomeration cylinder is connected with the faraday cylinder and then is connected with the particle trap. According to the variable voltage agglomeration device for controlling the quantity of the micro-nano particles, a charging and agglomeration technology is adopted, and through a method combining double-pole high-voltage charging and agglomeration, the agglomeration of exhaust particles is realized, so that the particle size is increased, meanwhile, the quantity and the concentration of the particles are reduced, the trapping efficiency of the particle trap is further improved, and particle mass emissions are reduced; particle surface charge measurement and high-voltage electric field control are connected together, so that the most suitable range control for the charging voltage is achieved and the energy consumption of the high-voltage power supply is reduced; and through double temperature sensors and double mass flow meters, the effect of the charging voltage and exhaust temperature on the charging and agglomeration of the particles and the study on the efficiency of the particle trap can be discussed.

Description

technical field [0001] The invention relates to the technical field of post-treatment of diesel engine exhaust, in particular to a variable voltage coagulation device for controlling the number of micro-nano particles in the exhaust gas of a compression-ignition internal combustion engine. Background technique [0002] Modern diesel engines have the advantages of high thermal efficiency, strong power and reliable operation, and are widely used in vehicles and construction machinery. However, the micro-nano particles emitted by them bring great harm to the atmospheric environment and human health. 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 re...

AI Technical Summary

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

Images