ELECTROSTATIC PRECIPITATOR FOR TREATING DIESEL ENGINE EXHAUST GAS

Title:

ELECTROSTATIC PRECIPITATOR FOR TREATING DIESEL ENGINE EXHAUST GAS

Document Type and Number:

WIPO Patent Application WO/2017/057199

Kind Code:

A1

Abstract:

Provided is an electrostatic precipitator for treating diesel engine exhaust gas, said precipitator being capable of adequately accommodating increases in the outer diameter and axial length of a collecting tube in a tubular collecting unit in a multistage electrostatic precipitator. The present invention is characterized in that a plurality of multistage tubular collecting modules are configured so as to be positioned apart on a plurality of levels at a desired spacing in the tube-axis direction; the multistage tubular collecting modules comprising multistage concentric-cylinder-shaped discharge electrode support cylinders and multistage concentric-cylinder-shaped collecting tubes; the multistage concentric-cylinder-shaped discharge electrode support cylinders having a tubular collecting part comprising a main collecting tube of specific length that constitutes part of a discharge electrode for charging particulate matter included in exhaust gas from a diesel engine in which heavy oil is used, and a dust collecting electrode for collecting the charged particulate matter, the multistage concentric-cylinder-shaped discharge electrode support cylinders further having, inside the main collecting tube of the tubular collection part, a discharge electrode comprising a short discharge electrode needle or a low-height saw-blade-shaped discharge electrode plate, on an outer surface thereof; and the multistage concentric-cylinder-shaped collecting tubes being positioned to form pairs so as to overlap said discharge electrode support cylinders.

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Inventors:

FURUGEN MUNEKATSU (JP)
MAKINO TADASHI (JP)
WATANABE TOSHIKAZU (JP)

Application Number:

PCT/JP2016/078098

Publication Date:

April 06, 2017

Filing Date:

September 23, 2016

Export Citation:

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Assignee:

USUI KOKUSAI SANGYO KK (JP)

International Classes:

F01N3/01; B01D50/00; B03C3/019; B03C3/15; B03C3/40; B03C3/41; B03C3/49

Foreign References:

US20040025497A1	2004-02-12
JPH04301117A	1992-10-23
JP2014238086A	2014-12-18

Attorney, Agent or Firm:

OSHIDA Yoshitaka (JP)

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