KR20140020397A - Diesel particulate system using of pelectrolytic protection type diesel particulate filter - Google Patents

Abstract

The present invention relates to a diesel particulate filtering system for filtering exhaust gas exhausted from a diesel engine using an electrostatic precipitation type diesel particulate filter and more specifically, to a diesel particulate filtering system for a diesel engine using an electrostatic precipitation type diesel particulate filter capable of preventing the reduction of efficiency caused when a number of generated ions are reduced by filtering exhaust gas exhausted from a diesel engine using the diesel particulate filter, but preventing the phenomenon in which the insulated state is broken by dust contained in the exhaust gas using the exhaust gas. [Reference numerals] (AA) Outdoor air

Description

Diesel Particulate System using of Pelectrolytic protection type Diesel Particulate Filter

The present invention relates to a soot filtration system configured to filter the exhaust gas discharged from a diesel engine using an electrostatic precipitating type soot filtration device. Specifically, the exhaust gas discharged from the diesel engine using an electrostatic precipitating type soot filtration device. Diesel engine using an electrostatic precipitating type soot filtration device which is filtered to prevent the phenomenon of the insulation state caused by the dust contained in the exhaust gas by using branched exhaust gas to prevent efficiency decrease due to the deterioration of ions. Of soot filtration systems.

Diesel engines are used in various fields such as vehicles, ships, and trains because of their high efficiency, but have a disadvantage of emitting a large amount of exhaust gas (soot) during unstable combustion.

As such, regulations and regulations on emissions (fumes) emitted by diesel engines are being strengthened not only in Korea but also abroad, so that companies and research institutes in each country continue to develop soot filtration systems and systems that can reduce the smoke. Due to this, various methods, technologies, and devices have been developed and are constantly being developed.

In general, a soot filtration device used in a conventional diesel engine uses a regeneration method such as a diesel particulate filter (DPF) as a method of treating particulate matter (PM) in exhaust gas. In order to solve the present inventors have developed a soot filtration device made as shown in Figs. 6 and 7, and provided a technology as a soot filtration device of (KR) Patent Publication No. 10-2011-0072095.

The soot filtration device applying the diesel particulate filter (DPF) method is oxidized by passing harmful CO, HC and particulate matter (PM) in diesel engine (light diesel) vehicle exhaust gas through a ceramic or metal foam filter coated with an oxidation catalyst. In the method of regenerating by reacting with the catalyst, the ceramic filter is weak in durability and catches a large amount of soot, while the dust collecting efficiency of the fine particles is low, which is inadequate when the regulation of the exhaust gas is a counting standard.

The soot filtration device of (KR) Korean Patent Publication No. 10-2011-0072095 has a discharge rod 3 having a discharge piece for generating ions using a voltage applied from the high voltage applying device 5 as shown in FIGS. 6 and 7. And a metal to collect a large amount of soot particles in the air passing through the charged part, the first dust collecting part 1 for collecting fine particles charged by the ions generated in the charged part, and the first dust collecting part 1. It consists of a second dust collector 2 in the form of foam, and collects the first charged microparticles in the first dust collector 1 and collects in the second dust collector 2 in the form of secondary metal foam, thereby simultaneously mass and concentration. Application and calculation were made to meet the collection efficiency regulation criteria.

In combination with various environmental problems such as abnormal temperature caused by environmental pollution, in recent years, particulate matter (PM) standards in diesel engine exhaust gas are applied simultaneously with counting standards and mass standards, and at lower standards. The technology for good soot filtration should be developed.

In addition, in the soot filtration device provided in the (KR) Patent Publication No. 10-2011-0072095, as shown in Figs. 6 and 7, the insulating state is destroyed by the dust such as particulate matter (PM) in the exhaust gas Phenomenon occurs.

That is, the first dust collecting part 1 and the fixing member 4 by exposing the fixing member 4 and the insulating member 4a, which are conductors for fixing the discharge rod 3 to the discharge gas introduced through the inlet, as shown in FIG. 6. As the dust accumulates therebetween, the insulation state is destroyed by the dust, and as shown in FIG. 7, the insulation state must be maintained between the first dust collecting part 1 and the fixing member 4 and the discharge rod 3, which are insulators. There is a problem that the insulation state is destroyed by the dust accumulated by exposure to the exhaust gas.

In this case, when the insulation state is destroyed by dust, the corona discharge is not easily performed due to the high voltage applied thereto. As a result, the generation of ions rapidly decreases and the dust collection efficiency of the fine particles in the exhaust gas drops rapidly. There is a problem with the reliability of the device.

(KR) Korean Patent Publication No. 10-2011-0072095

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

The present invention is to prevent the insulation state is destroyed even after long-term use in the soot filtration device using the electrostatic precipitating method to overcome the degradation of the reliability caused by the destruction of the insulation state, and to satisfy the regulations and regulations by counting and mass standards To provide a soot filtration system for a diesel engine using a dust collection soot filtration system.

In order to achieve the above object, a diesel engine soot filtration system using the electrostatic precipitating type soot filtration device of the present invention is installed to communicate with an exhaust pipe for guiding the exhaust gas discharged from the diesel engine to filter the exhaust gas. A dust collecting type soot filtration device; And a controller configured to branch the discharged gas discharged to the exhaust pipe and to supply the branched discharged gas to an insulating holding unit of an electrostatic precipitating type soot filtration device, and to be supplied to an insulating holding unit of the electrostatic precipitating type particulate filter. The exhaust gas is characterized by maintaining the insulation state of the discharge rod by preventing dust from being deposited on the insulating holding portion.

A branch pipe installed in the exhaust pipe and branching the discharge gas and supplying it to the insulating holding part of the electrostatic precipitating type particulate filter is installed with a valve, a heater, a filter and a temperature sensor, and the valve and the heater are controlled by a controller. It is done.

The exhaust gas supplied to the branch pipe is mixed with the external air supplied to the external engine and supplied to the insulation holding unit of the electrostatic precipitating type soot filtration device.

In the electrostatic precipitating type soot filtration device, a discharge gas inlet is formed at one side of a dust collecting part made of a metal foam having an internal space into which the exhaust gas is introduced, and a discharge rod generating ions by a high voltage applied to the internal space. It is installed, but the discharge rod is fixed to the site is located on the opposite side of the exhaust gas inlet, it is made to include an insulation holding means using the air is formed.

Alternatively, the electrostatic precipitating type soot filtration device may include: a dust collecting part including a discharge gas inlet and an inner space in which a discharge rod insertion hole is formed on an opposite side of the discharge gas inlet, and collecting metal particles to collect charged particles; It is connected to the discharge rod insertion port is made to include a discharge rod mounting hole for fixing the discharge rod, to maintain the insulating state using air.

That is, the electrostatic precipitating type particulate filter includes a housing having an inner space; An inlet connector formed at one side of the housing and configured to guide the exhaust gas by forming a through hole for inflow; A discharge connector formed with a discharge hole formed in one side of the housing;

Located in the interior space of the housing, and has a discharge gas inlet connected to the inlet through-hole of the inlet connector, and the inner space formed with the discharge rod insertion hole opposite to the exhaust gas inlet, the metal foam to collect the charged particles A dust collecting part; A discharge rod mounting hole provided at a side of the discharge rod insertion hole of the dust collector and having a discharge rod through hole and an insulating air nozzle hole; A discharge rod fixedly installed in the discharge rod through-hole of the discharge rod mounting hole so as to maintain insulation, and having a discharge pin positioned in an inner space of the dust collecting unit; It is configured to include a high voltage applying device electrically connected to the dust collector and the discharge rod to apply a high voltage.

One or two or more insulating air nozzle holes are formed, and the air supplied to the insulating air nozzle holes is formed such that a swirl is formed around the through-holes for the discharge rod.

The particulate filter of the diesel engine using the electrostatic precipitating type particulate filter of the present invention made as described above branches off some of the exhaust gas discharged from the diesel engine, and supplies the branched exhaust gas to the insulating holding portion of the discharge rod to generate dust. This accumulation can be prevented and the breakage of the insulating state can be prevented, thereby reducing the reliability deterioration caused by the reduction of the dust collection efficiency due to the breakdown.

In addition, in order to prevent deterioration of efficiency and regeneration of the soot filtration apparatus, air must be supplied to a high temperature state by maintaining the insulation state, but a loss due to heating can be prevented by using a high temperature exhaust gas discharged.

1 is a schematic diagram of a soot filtration system of a diesel engine using an electrostatic precipitating type soot filtration device showing an embodiment of the present invention.
Figure 2 is a schematic cross-sectional view of the electrostatic precipitating particulate filter used in the particulate filter of the diesel engine using the electrostatic precipitating particulate filter of the present invention.
Figure 3 is an exploded cross-sectional schematic diagram of the electrostatic precipitating particulate filter used in the particulate filter of the diesel engine using the electrostatic precipitating particulate filter of the present invention.
Figure 4 is a perspective schematic view of the discharge rod mounting hole of the electrostatic precipitating type dust filter used in the particulate filter of the diesel engine using the electrostatic precipitating particulate filter of the present invention.
Figure 5 is a schematic cross-sectional view of the discharge rod mounting hole of the electrostatic precipitating type dust filter used in the particulate filter of the diesel engine using the electrostatic precipitating particulate filter of the present invention.
6 is a schematic cross-sectional view of a soot filtration device using a conventional charging method.
Figure 7 is a schematic cross-sectional view of another soot filtration device using a conventional charging method.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

The present invention branches a portion of the exhaust gas discharged from the diesel engine, and supplies the branched exhaust gas to the insulation holding portion of the electrostatic precipitating type soot filtration device to prevent breakage of the insulation state due to the sedimentation of dust caused by the breakdown of the insulation state. It is a fume filtration system of diesel engine using electric dust collection soot filtration device to solve the problem.

In the electrostatic precipitating type soot filtration device, a discharge gas inlet is formed at one side of a dust collecting part made of a metal foam having an internal space into which the exhaust gas is introduced, and a discharge rod for generating ions by a high voltage applied to the internal space is installed. Wherein, the discharge rod is fixed to the site is located on the opposite side of the exhaust gas inlet, made of a configuration comprising an insulation holding means using air, or

Alternatively, the electrostatic precipitating type soot filtration device may include: a dust collecting part including a discharge gas inlet and an inner space in which a discharge rod insertion hole is formed on the opposite side of the discharge gas inlet, and collecting metal particles to collect charged particles; It is connected to the discharge rod insertion port is made of a configuration including a discharge rod mounting hole for fixing the discharge rod, to maintain the insulating state using air.

1 shows a particulate filter system of a diesel engine using the electrostatic precipitating type particulate filter of the present invention.

Referring to Figure 1, the configuration of the particulate filter of the diesel engine using the electrostatic precipitating particulate filter of the present invention,

The exhaust gas discharged from the diesel engine 200 is installed to communicate with the guided exhaust pipe 210, discharge is generated by the applied high voltage, and charge the fine particles with a large amount or anion generated by the discharge Electrostatic precipitating type particulate filter using a metal foam to collect the particulate matter (PM) of the exhaust gas passing through, and the branch pipe 320 for branching a part of the exhaust gas discharged from the exhaust pipe (210) ), A controller 310 for controlling the exhaust gas and the outside air supplied to the electrostatic precipitating type soot filtration device 100 through the external pipe 330 for supplying the outside air and the branch pipe 320 and the outside pipe 330. It is composed of

As illustrated in FIG. 1, the exhaust pipe 210 is provided with a branch pipe 320 for branching some of the guided exhaust gas, and is electrically connected to the controller 310 to guide the temperature of the exhaust gas guided to the exhaust pipe 210. The temperature sensor 311 is measured.

The branch pipe 320 guides the branched discharge gas to the electrostatic precipitating type soot filtration device 100, and a valve 321 for controlling the amount of the exhaust gas on the branch pipe 320 and discharge gas. Filter type filter 323 consisting of a heating device 322 using electricity for heating and heating, a filtration (nonwoven) cloth for removing dust (fine particles, particulate matter, etc.) in the exhaust gas, and branched exhaust gas It includes a temperature sensor 324 for measuring the temperature of.

The valve 321, the heater 322, and the temperature sensor 324 are electrically connected to the controller 310, and the valve 321 and the heater 322 are operated by the controller 310. Controlled.

The external pipe 330 is a pipe for supplying external air, and an air pump 331 for supplying air on the external pipe 330, and filtration (nonwoven) for removing foreign matter (fine particles, etc.) in the outside air. And a filter type filter 332 made of cloth or the like.

2 and 3, the configuration of the electrostatic precipitating type particulate filter 100 is largely installed in the housing 10 having an inner space 11, and installed at one side of the housing 10 to guide the exhaust gas. An inlet connector 20 having an inlet through-hole 21 formed therein and an exhaust gas installed at one side of the housing 10 to remove pollutants (fine particles, particulate matter (PM), harmful gases, etc.) are discharged. The discharge connector 30 is formed with a discharge through-hole 31 is formed, and is installed to be located in the inner space 11 of the housing 10, the interior of the discharge gas guided to the inlet through-hole 21 is introduced A dust collecting part 40 formed of a metal foam having a space 41 formed therein, and a discharge rod installed on the opposite side (facing each other) of the inlet connector 20 to fix the discharge rod 60. The discharge rod mounting holes 50 having the through holes 52 formed therein and the discharge rod mounting holes 50. A plurality of discharge pins 61 are formed, the discharge rod 60 is installed so that the plurality of discharge pins 61 are located in the internal space 41 of the dust collector 40, the dust collector 40 and the discharge rod ( And a high voltage applying device 70 electrically connected to 60 to apply a high voltage.

Referring to FIG. 3, the housing 10 is usually formed in a cylindrical shape, and a flange portion is formed so that the inlet connector 20 and the discharge rod mounting member 50 may be installed at both ends thereof, respectively, and one surface of the cylinder. There is formed a discharge connector 30 is formed with a discharge through-hole 31 for communicating the internal space (11). The discharge connector 30 may be integrally formed in the housing 10 in the same manner as the welding method, or may be installed in a connection method such as a flange method such as the inlet connector 20.

3 and 4, the inlet connector 20 is installed in a flange portion formed at one side of the housing 10 by using a fastening member such as a bolt and a nut, and is opposite to the housing 10. Is connected to the exhaust pipe 210 for guiding the exhaust gas to guide the exhaust gas supplied from the exhaust pipe to be supplied to the dust collector 40 is installed in the inner space 11 of the housing 10. The inlet connector 20 is a flange portion connected to the flange portion of the housing 10 so as to be connected to the inlet through-hole 21 and the exhaust gas inlet port 42 of the dust collector 40, the connection protrusion 22 Is formed, the connecting protrusion 22 is inserted into the exhaust gas inlet (42). The connection protrusion 22 has an inclined (tapered) outer circumference 23 to be easily inserted into the exhaust gas inlet 42 and to be closed with the exhaust gas inlet 42.

2 and 3, the dust collecting part 40 is formed of a metal foam having a cylindrical shape (pipe) to collect charged fine particles with electrostatic force, and to collect particulate matter (PM) in the exhaust gas passing through. In addition, the dust collecting part 40 is discharged in communication with the inner space 41 in which the discharge rod 60 in which the plurality of discharge pins 61 are formed, and the inflow through-hole 21 of the inflow connector 20. The discharge gas inlet 42 into which the gas flows, and the discharge rod insertion hole 43 into which the discharge rod 60 is inserted into the inlet 42, are provided. In addition, the metal foam constituting the dust collecting part 40 is capable of removing and regenerating charged fine particles, particulate matter (PM) and harmful gases that are collected and collected by oxidation (metal) catalyst coating. The oxidation (metal) catalyst is a metal oxide such as platinum or platinum rhodium alloy.

2 and 3, the discharge rod mounting hole 50 is fixed to the discharge rod 60, the discharge rod insertion hole 43 of the dust collector 40 is inserted into the discharge in the inner space 41 The rod 60 is to be positioned, the discharge rod mounting hole 50 is installed in the housing 10 is installed inlet connector 20 is installed in the opposite direction of the inlet connector 20. The discharge rod mounting hole 50 is installed in the flange portion of the housing 10 in the same manner as the inlet connector 20 described above.

Referring to FIG. 4, the discharge rod mounting hole 50 is formed in a hat shape to communicate with the discharge rod insertion hole 43 of the dust collecting part 40 and the discharge rod 60. Insulation for insulating insulation means using air in the insulating holding portion through which the discharge rod through hole 52 to be penetrated and the discharge rod 60 installed in the discharge rod through hole 52 are maintained in an insulating state. It is composed of an air nozzle hole 53, the inner circumferential surface constituting the inner space 51 is formed to be inclined (tapered) to be gradually expanded. Insulation air nozzle hole 53, which is an insulation holding means using the air, is formed of one or a plurality of two or more.

Referring to FIG. 5, a plurality of insulating air nozzle holes 53 are formed at equal intervals, and are inclined so that the supplied air rotates (swirl) about the discharge rod 60. That is, the plurality of insulating air nozzle holes 53 are formed in a tangential direction in the circular inner space 51.

The air supplied to the plurality of insulating air nozzle holes 53 is heated to prevent the temperature of the exhaust gas introduced into the internal space 41 of the dust collecting part 40 from being lowered to prevent regeneration due to the oxidation catalyst. It is preferable that hot air is supplied, and it is preferable that the conveyance (feed) speed of air is usually supplied at 17 m / s or more. The temperature of the air is usually used hot air heated to 100 ℃ or more.

That is, the insulation air nozzle hole 53 is installed to communicate with the branch pipe 320 for guiding the branched exhaust gas, and the branched and filtered exhaust air guided through the branch pipe 320 is air for insulation. It is supplied to the nozzle hole 53.

2 to 4, the discharge rod 60 is fixedly installed in the discharge rod mounting hole 50 is installed to be located in the internal space 41 of the dust collector 40 of the plurality of discharge pins 61. However, the insulating member 65 is installed to be insulated from the discharge rod mounting holes 50.

With reference to Figures 1 and 2 attached to the operating state of the particulate filter of the diesel engine using the electrostatic precipitating particulate filter made as described above.

Exhaust gas discharged to the diesel engine 200 is guided to the exhaust pipe 210 is introduced into the electrostatic precipitating type soot filtration device 200, and then collected and recycled is discharged to the discharge pipe 220.

It is formed to maintain the insulation state in the insulating holding portion of the electrostatic precipitating type particulate filter 200 is supplied to the branched discharge gas and the external pipe 330 to the air nozzle hole 53 for the insulation pipe 320 is supplied. The mixed air of the outside air is supplied.

The ratio of the mixed air consisting of the branched exhaust gas supplied to the branch pipe 320 and the outdoor air supplied to the external pipe 330 is controlled by the controller 310, the controller 310 is an exhaust pipe 210 Control by the information transmitted from the temperature sensor 311 and the temperature sensor 324 provided on the branch pipe 320 is installed on.

That is, the controller 310 may increase the efficiency of the electrostatic precipitating type particulate filter by adjusting as follows by using the information transmitted from the temperature sensor 311 and the temperature sensor 324.

First, when the temperature of the exhaust gas guided to the exhaust pipe 210 is a low temperature,

The amount of branched exhaust gas supplied to the branch pipe 320 is increased, and the amount of external air supplied to the external pipe 330 is reduced, and the mixed air is formed, and the temperature of the branched exhaust gas is elevated by using the heater 322. To form a mixture of air, and supply it to the electrostatic precipitating type soot filtration device 200 to prevent the oxidation catalyst reaction caused by temperature decreases,

Second, when the temperature of the exhaust gas guided to the exhaust pipe 210 is a high temperature,

The amount of branched exhaust gas supplied to the branch pipe 320 is reduced, and the amount of external air supplied to the external pipe 330 is increased to form a low-temperature mixed air, and it is supplied to the electrostatic precipitating type soot filtration device 200 by high temperature. Prevent abnormalities.

The amount of branched exhaust gas supplied to the branch pipe 320 is controlled by the valve 321, and the amount of outside air supplied to the external engine 330 is controlled by the air pump 331.

Referring to the operating state of the electrostatic precipitating type soot filtration device 200,

Exhaust gas discharged to the exhaust pipe 210 is guided to the inlet connector 20 is introduced into the internal space 41 through the exhaust gas inlet 42 of the dust collector 40,

The discharge rod 60 including the dust collecting part 40 made of the metal foam and the plurality of discharge pins 61 is discharged by the high voltage applied from the high voltage applying device 70, and the dust collecting part 40 is discharged. Due to the discharge generated between the rods 60, a large amount of positive or negative ions are present in the internal space 41.

The fine particles in the exhaust gas flowing into the internal space 41 in which the large amount of ions are charged are charged in combination with the ions, and the charged fine particles are guided by the electrostatic force and are collected on the inner surface of the dust collector 40.

In addition, the exhaust gas flowing into the internal space 41 of the dust collecting part 40 through the exhaust gas inlet 42 is not free to move in the direction of the discharge rod mounting hole 50 located on the other side, and is made of metal foam. Pass through the dust collector 40.

That is, the exhaust gas introduced through the exhaust gas inlet 42 by the air supplied from the insulating air nozzle hole 53 formed in the discharge rod mounting hole 50 is the internal space of the discharge rod mounting hole 50. It does not flow into (51).

Even if it enters the inner space 51 of the discharge rod mounting hole 50, a small amount of exhaust gas charged and collected in the primary inner space 41 is introduced into the insulation holding portion, whereby dust and the like are deposited in the insulation holding portion. It will not be destroyed.

In addition, dust that is settled in a small amount is removed by rotating (swirl) the air (mixed air) supplied to the insulating air nozzle hole 53.

As the dust collector 40 is introduced into the inner space and discharged to the outside, contaminants (fine particles, particulate matter (PM), harmful gases, etc.) in the exhaust gas are collected and collected and regenerated by an oxidation catalyst.

The soot filter for easy maintenance and maintenance of the present invention made as described above can prevent the insulation state of the insulation maintenance unit from being destroyed even if it contains a large amount of pollutants in the exhaust gas due to long-term use or incomplete combustion. It can prevent the deterioration of reliability due to insulation breakdown, and by using the charged dust collecting method, the filtration collecting method and the regenerating method, it can be used very widely because it can satisfy the regulations and regulations based on counting and mass standards.

100: electrostatic precipitating type soot filtration device
10: housing 11, 41, 51: internal space
20: inlet connector 21: inlet through hole
30: discharge connector 31: discharge through hole
40: dust collector 42: exhaust gas inlet
43: discharge rod insertion hole
50: discharge rod mounting hole 52: discharge rod through hole
53: air nozzle hole for insulation
60: discharge rod 70: high voltage applying device
310: controller 311, 324: temperature sensor
320: branch pipe 321: valve
322: heater 323, 332: filter
330: external engine 331: air pump

Claims (7)

An electrostatic precipitating type soot filtration device 100 installed to communicate with an exhaust pipe 210 for guiding the exhaust gas discharged from the diesel engine 200 and filtering the exhaust gas;
And a controller 310 for branching the discharged gas discharged to the exhaust pipe 210 and supplying the branched discharged gas to the insulating holding part of the electrostatic precipitating type particulate filter 100.
The exhaust gas supplied to the insulating holding part of the electrostatic precipitating type particulate filter 100 prevents dust from being deposited on the insulating holding part and maintains the insulating state of the discharge rod. Engine soot filtration system. The method of claim 1,
The branch pipe 320 is installed in the exhaust pipe to supply the insulation holding portion of the electrostatic precipitating type soot filtration device 100 by branching the exhaust gas valve 321, the heater 322, the filter 323 and the temperature sensor ( 324 is installed,
The valve 321 and the heater 322 is controlled by a controller 310, the smoke filter system of the diesel engine using the electrostatic precipitating type particulate filter. 3. The method of claim 2,
The exhaust gas supplied to the branch pipe 320 is mixed with the outside air supplied to the external organ 330 and supplied to the insulating holding part of the electrostatic precipitating type soot filtration device 100 using an electrostatic precipitating type soot filtration device. Soot filtration system of diesel engine. 4. The method according to any one of claims 1 to 3,
The electrostatic precipitating type soot filtration device 100,
A discharge gas inlet is formed at one side of the dust collecting part made of a metal foam having an inner space into which the discharge gas is introduced, and a discharge rod for generating ions by a high voltage applied to the inner space is installed, and the discharge rod is fixed. It is located on the opposite side of the exhaust gas inlet, the diesel particulate filter system using the electrostatic precipitating type particulate filter, characterized in that it comprises an insulating holding means using air. 4. The method according to any one of claims 1 to 3,
The electrostatic precipitating type soot filtration device 100,
A dust collecting part having an exhaust gas inlet and an inner space in which a discharge rod inserting hole is formed on an opposite side of the exhaust gas inlet, and made of a metal foam to collect charged particles;
And a discharge rod mounting hole connected to the discharge rod inserting hole to fix the discharge rod and to maintain an insulating state using air. 4. The method according to any one of claims 1 to 3,
The electrostatic precipitating type soot filtration device 100,
A housing 10 having an inner space 11;
An inlet connector 20 installed at one side of the housing 10 and having an inflow through-hole 21 formed therein to guide the exhaust gas;
A discharge connector 30 having a discharge through hole 31 formed at one side of the housing 10;
Located in the inner space 11 of the housing 10, the exhaust gas inlet 42 is connected to the inlet through-hole 21 of the inlet connector 20 to the opposite side of the exhaust gas inlet 42 A dust collecting part 40 having an inner space 41 having a discharge rod inserting hole 43 formed therein and made of a metal foam for collecting charged particles;
A discharge rod mounting hole 50 installed at the discharge rod insertion hole 43 side of the dust collecting part 40 and having a discharge rod through hole 52 and an insulating air nozzle hole 53 formed therein;
The discharge rod is fixedly installed to maintain the insulation in the discharge rod through-hole 52 of the discharge rod mounting hole 50, the discharge rod is installed so that the discharge pin 61 is located in the internal space 41 of the dust collector 40 60;
And a high voltage applying device (70) electrically connected to the dust collecting part (40) and the discharge rod (60) to apply a high voltage. The method according to claim 6,
One or two or more insulating air nozzle holes 53 may be formed, and the air supplied to the insulating air nozzle holes 53 may have a swirl formed around the through-hole 52 for the discharge rod. A soot filtration system of a diesel engine using an electrostatic precipitating type soot filtration device, characterized in that it is made.

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