Exhaust gas purifier

Abstract

A cylindrical outer electrode (7) capable of collecting particulates is provided with a collecting cell (2) having passed through an inner electrode (6) whose outer surface is covered with a dielectric (5). The collecting cell (2) is disposed inside a cylindrical housing (1). An exhaust gas distributing means (3) is disposed at one end of the housing (1) for introducing exhaust gases (G) into the interior of the outer electrode of each collecting cell (2), and an exhaust gas collecting means (4) is disposed at the other end of the housing so that the means (4) communicates with a gap (14) between the inner surface of the housing and the outer surface of the outer electrode (7) of each collecting cell (2). An electric discharge control unit (15) is connected to the inner and outer electrodes (6, 7). Thus, an exhaust gas purifier, which is high in particulate removal efficiency and easy to maintain, is obtained.

Description

Technical field

[0001] The invention relates to an exhaust gas purification device. Background technique

[0002] The exhaust gas of diesel engines (combustion gas of diesel) contains coal composed of carbon and SOF (Soluble Organic Fraction) composed of high-boiling hydrocarbon components as the main components, and a trace amount of sulfuric acid is added. Particulate Matter (Particulate Matter: particulate matter) composed of salt (mist-like sulfuric acid component).

[0003] In order to suppress the diffusion of such particles into the atmosphere, a filter for collecting the particles is often installed in the exhaust system of the engine.

[0004] As an example of such a particulate filter, there is a form in which a honeycomb mandrel is formed by ceramics such as cordierite, and engine exhaust gas flows through a plurality of passages divided by the porous thin wall of the honeycomb mandrel.

[0005] In the above-mentioned particulate filter, every other end portion of the ...

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