Composite automobile exhaust particle filtering device

Abstract

The invention belongs to the field of electrostatic-type exhaust treatment systems and discloses a composite automobile exhaust particle filtering device. The device is characterized in that an electric charging device is disposed in an exhaust pipeline; the electric charging device is connected to a high-voltage positive electrode; the outer wall of the exhaust pipeline is connected to a grounding electrode; an electrostatic field is formed in the exhaust pipeline to conduct pre-charging of exhaust particles; a metal filtering screen is disposed at a discharge hole of the exhaust pipeline to collect the exhaust particles; the electric charging device is a center pillar, multiple parallel electrode pillars or an electrode board; and devices such as an electric field stabilization device, a compressed air control pipeline, a gas state detection sensor and a pressure sensor are also disposed on the exhaust pipeline to promote electric field stabilization and collect the exhaust particles. The filtering device disclosed by the invention has the advantages that a demand for exhaust filtering under different loads, especially heavy loads, can be satisfied; the electric charging capability of a filtering system can be enhanced effectively, and particle collection can be perfected; filtering performance can be improved; the efficiency is high; and the filtering performance is stable.

Description

technical field [0001] The invention belongs to the field of electrostatic tail gas treatment systems, and more specifically relates to a compound automobile exhaust particle filter device, which can improve the filter performance of the filter and has the advantages of high filter efficiency and stable filter performance. Background technique [0002] The concentration and exposure time of particulate matter in the atmosphere are the key factors that determine the inhalation amount and the degree of harm of particulate matter. Fine particulate matter is rich in toxic and harmful substances, and has a long residence time in the atmosphere, a long transportation distance, and a long exposure time. Therefore, it is harmful to the human body. Health and atmospheric environmental quality have even greater impacts. According to the "2013 Motor Vehicle Pollution Prevention and Control Annual Report" released by the Ministry of Environmental Protection in early 2014, diesel vehicle...

AI Technical Summary

Problems solved by technology

However, most of the existing DPF filter element materials are mainly cordierite and silicon carbide. This kind of filter body has the following disadvantages: (1) long-term use of filter resistance, high price, difficult to recycle after discarding, (2) The requirements for oil quality are high, and low-sulfur and low-ash diesel oil is required. (3) Frequent short-distance operation will affect regeneration and easy thermal cracking and other issues

However, this type of product also has the problem of insufficient filtration efficiency. In addition, due to the limitation of the structure itself, under the high-load operation of the engine, due to the fast exhaust flow rate and high concentration of exhaust particles, the problem of insufficient filtration capacity will also occur.

[0005] To sum up, the current existing various filter elements or simply adding electrostatic filtration cannot fully meet the needs of exhaust emissions

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