Unlock instant, AI-driven research and patent intelligence for your innovation.

Exhaust gas purification method and exhaust gas purifier

An exhaust gas purification system and exhaust gas purification technology, applied in chemical instruments and methods, separation methods, exhaust gas treatment, etc., can solve problems such as high power consumption, and achieve the effects of improving capture efficiency and combustion removal efficiency.

Inactive Publication Date: 2008-06-25
ISUZU MOTORS LTD
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this region RL, a large amount of power will be consumed when the clogging of the insulating filter 12 is removed by energizing.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Exhaust gas purification method and exhaust gas purifier
  • Exhaust gas purification method and exhaust gas purifier
  • Exhaust gas purification method and exhaust gas purifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Next, an exhaust gas purification experiment performed using the exhaust gas purification systems 1B and 1C according to the third embodiment will be described. FIG. 17 schematically shows the configuration of the experimental apparatus of Example 1. FIG. In this first example, the exhaust gas purification system 1B was arranged on the exhaust passage 51 of a 2t truck 50 equipped with a diesel engine with a displacement of 4300 cc. A differential pressure sensor 52 for measuring a differential pressure across the ceramic filter 12B is provided, and a diluter 53 and a particle measuring device 54 for measuring components of exhaust gas branched from the exhaust passage 51 are provided.

[0104] From the upstream, it is composed of the oxidation catalyst 30 , the electrification part 20B generated by corona discharge, and the filter part 10B. The oxidation catalyst 30 is platinum supported on a ceramic honeycomb. The charging unit 20 is a coaxial cylindrical type in whi...

Embodiment 2

[0113] FIG. 20 schematically shows the configuration of the experimental apparatus of Example 2. FIG. In Example 2, the exhaust gas purification system 1C shown in FIGS. 12 to 15 was arranged on the exhaust passage 51A of a truck 50A equipped with a diesel engine with a displacement of 5000 cc. Experimental mode is JE05 transitional mode.

[0114] This exhaust gas purification system 1C is configured to include an oxidation catalyst 30 , a charging unit 20B by corona discharge, and a ceramic filter 12C from the upstream side. The oxidation catalyst 30 is platinum supported on a ceramic honeycomb. The charging unit 20B is a coaxial cylindrical type in which eight coaxial corona discharge tubes 25B ( FIG. 12 ) having a diameter of about 60 mm and an effective discharge length of 80 mm are arranged in parallel. Ceramic filter 12C has a bulk density of about 130kg / m 3 , thickness 24mm, area of ​​gas passing surface 2000cm 2 of ceramic fibers. Electrode pairs having an electro...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

In order to use the small luminescent discharge that repeatedly occurs and disappears randomly in space and time on the insulating filter surface, the captured PM is combusted and removed with less power consumption, and the concentration of the exhaust gas from diesel engines, etc. is increased. The capture efficiency and combustion removal efficiency of PM, one or more electrode pairs (13) are arranged on the surface or near the surface of the insulating capture member (12) that captures the particulate matter (41) in the exhaust gas, and the electrodes A predetermined voltage (Vs) is applied between (13), and the predetermined voltage is such that as the accumulation amount of the above-mentioned particulate matter captured by the surface of the above-mentioned insulating capturing member (12) increases, the space and The tiny luminescent discharge (42) that repeatedly occurs and disappears at random in time is generated on the surface of the above-mentioned insulating capturing member, and the above-mentioned insulating material is turned off by the above-mentioned tiny luminescent discharge (42) generated by the application of the predetermined voltage (Vs). The particulate matter (41) captured by the property capturing member (12) is combusted and removed.

Description

technical field [0001] The present invention relates to a method and system for purifying exhaust gas from internal combustion engines and the like. In particular, it relates to an exhaust gas purification method and an exhaust gas purification system effective in removing particulate matter (hereinafter referred to as "PM") discharged from a diesel engine. Background technique [0002] Diesel engines are mostly installed in automobiles, especially large vehicles. Especially in recent years, it is urgently desired to reduce the discharge of PM together with nitrogen oxides, carbon monoxide, hydrocarbons, etc. in the exhaust gas. Therefore, it is desired to develop technologies for fundamentally reducing PM through improvement of engines and optimization of combustion conditions in cylinders, and to establish technologies for effectively removing PM in exhaust gas. And, in order to remove PM in the exhaust gas, a method using a filter, an electric dust collection method, an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/02B01D53/94B01D39/20F01N3/24
CPCF01N3/2086F01N2240/04Y02T10/26F01N3/0275B01D2259/818B01D53/323B01D2258/012Y02T10/12B01D39/20B01D53/94F01N3/02F01N3/24
Inventor 内藤健太千林晓浜田祐一河西纯一田村吉宣我部正志
Owner ISUZU MOTORS LTD