JPS59145314A - Diesel particulate collector - Google Patents

Abstract

PURPOSE:To provide a collector with low filtering resistance and high collecting efficiency by providing also an electric dust collector means which applies high voltage static electric field to a exhaust gas path to ionize particulate and attach the particulate to a filter. CONSTITUTION:In a particulate collector utilizing foamed steel 1 of excellent electric conductor for DPF, high static electric field is applied between an earth electrode 2 directly connected to the foamed steel 1 and an electrode 3 insulated from a main body provided in an exhaust gas flow path of DPF and gas shielded to carry out corona discharge so that the peripheral gas is ionized. Since this ion charges particulate included in the exhaust gas, charged particulate is attached to the earthed foamed steel 1.

Description

[Detailed Description of the Invention] Regarding the conventional diesel particulate filter (hereinafter referred to as DP)
Foamed steel, foamed ceramics, and the like used as Pct (hereinafter abbreviated as Pct) have a large filtration resistance, and when this resistance is reduced, the particulate (hereinafter abbreviated as Pct) collection efficiency decreases.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and provide a diesel particulate collection device that has low filtration resistance and high PET collection efficiency.

The diesel particulate collection device according to the present invention includes:
The DPF is made of foamed steel or foamed ceramic, and is equipped with an electrostatic precipitator to achieve the above objective.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a diesel nozzle dust collector according to the present invention will be described below with reference to FIGS. 1 to 7.

Figure 1 shows a pet collection device that uses foamed steel 1, which is a good electrical conductor, as a DPF.A ground electrode 2 is directly connected to the foamed steel 1, and an electrode 3 is insulated and gas-shielded from the main body provided in the exhaust gas flow path of the DPF. During this time, a high-voltage electrostatic field is applied to generate a corona discharge, which ionizes the surrounding gas.

Since these ions charge the particulate matter contained in the exhaust gas, the charged particulate matter adheres to the grounded foamed steel 1. This is the structure and operation of the foamed steel Pet collection device. FIG. 2 is a view taken in the direction of arrow A in FIG. 1.

FIG. 3 shows a second embodiment in which foamed steel l is placed before and after the high-voltage electrode 3.

Figure 4 shows a third embodiment with a multi-layer structure made of foamed steel.

Fig. 5 shows a fourth embodiment in which a large number of holes are made in the foamed steel 1 shown in Fig. 1, and a high voltage electrode 3 is arranged therein, and a ground electrode 2 is provided therein. Fig. 6 is a view taken in the direction of arrow B in Fig. 5. be.

FIG. 7 shows a fifth embodiment in which an insulating foamed ceramic is used as a PET electrostatic precipitator, in which one or many pairs of high-voltage electrostatic fields are arranged within the foamed ceramic 5.

In any embodiment, the portion where the power supply passes through these DPF devices must be electrically insulated and gas shielded.

The effects of the second to fifth embodiments described above are completely the same as those of the first embodiment.

In these embodiments, a plurality of pairs of electrodes can increase the area of the electrodes, improve the efficiency of collecting Pct into the DPF, and reduce the voltage of the power source used.

As mentioned above, the diesel fuel collection device according to the present invention uses foamed steel or foamed ceramics, applies a high-pressure electrostatic field to the exhaust gas, and collects PET in the exhaust gas.
Since an electrostatic precipitator for attaching DPF to foamed steel or foamed ceramics is also provided, the collection efficiency of the DPF can be improved. It is also possible to improve the trapping efficiency by making the mesh of the trap rougher and to reduce the exhaust pressure.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a first embodiment of the diesel gas collector according to the present invention using foamed steel as a DPF, Fig. 2 is a view taken in the direction of arrow A in Fig. 1, and Fig. 2
4 is a sectional view of the third embodiment, FIG. 5 is a sectional view of the fourth embodiment, FIG. 6 is a view taken along arrow B in FIG. 5, and FIG. 7 is a sectional view of the fifth embodiment. FIG. 3 is an example cross-sectional view. 1... Foamed steel, 2... Earth, 3... High voltage electrode, 4... DC high voltage power supply, 5... Foamed ceramics. Figure 1 Figure 2 Figure 4 Figure 4 Figure 5

Claims (3)

[Claims] (1) In a filter in which a foamed filter material is used as a diesel particulate filter, an electrostatic precipitator is provided that applies a high-pressure electrostatic field to the exhaust gas passage to ionize the particulates and adhere the particulates to the filter. Diesel particulate collection device attached. (2) The diesel fuel rate collecting device according to claim 1, wherein the foam filter material is foamed steel having a good electrical conductivity. (3) The diesel particulate collection device according to claim 1, wherein the foamed filter material is an electrically insulating foamed ceramic.