KR20150131866A - CONCURRENTLY DECREASING SYSTEM FOR NOx AND PM OF DIESEL ENGINE USING PLASMA - Google Patents

Abstract

The present invention provides a system to simultaneously reduce nitrogen oxide and PM of a diesel engine using plasma capable of effectively removing particulate matters (PM) or fine dusts, and nitrogen oxide contained in a discharge gas discharged from a diesel engine. According to an embodiment of the present invention, the system to simultaneously reduce nitrogen oxide and PM of the diesel engine using plasma comprises: an exhaust pipe to distribute exhaust gas of a diesel engine; a diesel particulate filter (DPF) installed in the exhaust pipe to collect the particulate matters or fine dusts contained in the exhaust gas; a plasma burner installed inside the exhaust pipe in an inlet side of the DPF, and to combust the particulate matters or fine dusts contained in the exhaust gas by heating the exhaust gas with plasma flame; a selective catalytic reduction (SCR catalyst) installed in an outlet side of the DPF of the exhaust pipe; and a plasma nozzle installed inside the exhaust pipe in the inlet side of the SCR catalyst, and to inject ammonia generated by atomizing and pyrolyzing a plasma arc furnace urea solution into the inlet side of the SCR catalyst, and mixing it with the exhaust gas.

Description

TECHNICAL FIELD [0001] The present invention relates to a system for reducing NOx and NOx in a diesel engine using a plasma,

The present invention relates to a system for reducing NOx and PM in a diesel engine using plasma for reducing fine particles and nitrogen oxides contained in exhaust gas from a diesel engine.

The post-treatment system of the diesel engine includes a diesel particulate filter trap (DPF) and a selective catalytic reduction (SCR) installed in the exhaust pipe of the diesel engine.

The soot filter (DPF) collects particulate matter (PM) and particulate matter (PM) contained in the exhaust gas discharged from the diesel engine. For continued operation of the Diesel Particulate Filter (DPF), the particulate filter must be regenerated by burning particulate matter or fine dust.

The selective reduction catalyst (SCR) removes the nitrogen oxides (NOx) contained in the exhaust gas of the diesel engine. Urea-selective catalytic reduction (Urea-SCR) is applied to reduce NOx emissions from large diesel engines.

That is, the urea water addition selective catalytic reduction system includes a urea water supply unit and a charging unit for injecting urea water in front of a selective catalytic reduction (SCR) catalyst, and further includes a nitrogen oxide sensor and a urea water injection control device, Injects urea water into the inside.

The injected urea water is pyrolyzed into ammonia by the exhaust gas heat of the diesel engine in the exhaust pipe. The ammonia thus produced reacts with the nitrogen oxides contained in the exhaust gas in the SCR catalyst mounted at the rear end of the exhaust pipe to produce water and nitrogen.

In order to effectively reduce the nitrogen oxide, ammonia (NH ₃ ) and nitrogen oxide (NO x) must be reduced to nitrogen (N ₂ ) at a predetermined rate (for example, 1: 1) at a high temperature. That is, the ammonia and the exhaust gas need to be quickly mixed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system for simultaneously reducing NO x and NO x in a diesel engine using plasma that effectively removes particulate matter, particulate matter (PM), and nitrogen oxides contained in exhaust gas discharged from a diesel engine.

The nitrogen oxides and the PM simultaneous abatement system of a diesel engine using plasma according to an embodiment of the present invention includes an exhaust pipe through which exhaust gas of a diesel engine is circulated and a particulate matter or fine dust trapped in the exhaust gas, A plasma burner installed inside the exhaust pipe at the inflow side of the DPF filter for heating the exhaust gas with a plasma flame to burn particulate matter and fine dust collected in the DPF filter; A selective reduction catalyst (SCR catalyst) provided on the discharge side of the DPF filter of the exhaust pipe, and ammonia generated inside the exhaust pipe on the inflow side of the SCR catalyst by atomizing and pyrolyzing the plasma arc urea water, And a plasma nozzle which mixes the gas with the exhaust gas.

The plasma nozzle includes a first housing that discharges compressed air to be supplied to a discharge port that is narrowed and is electrically grounded, a second housing which is provided around the discharge port of the first housing and discharges the urea water supplied through the spray hole into the discharge hole, A driving electrode which is housed in the first housing and forms a discharge gap between the end of the housing and the discharge port and which is applied with a driving voltage and which seals one side of the first housing on the opposite side of the discharge port, And a wall having an air supply port for supplying the air.

A compressor for supplying air to the first housing may be connected to the air supply line to supply air to the plasma burner.

The high voltage power for applying a driving voltage to the driving electrode may be connected to supply a driving voltage to the plasma burner.

The first housing may include a cylindrical portion formed on a side to which air is supplied and sealed by the wall, and an extended passage portion extending from the end of the cylindrical portion and connected to the discharge port.

The cylindrical portion may further include a hub connected to a center of the cylindrical portion and supporting the driving electrode at a center, and the hub may support the driving electrode via an insulating member.

The discharge port may have a length set toward the end of the second housing, and the discharge holes may be provided in plural along the longitudinal direction of the discharge port.

The extension passage may be gradually reduced in the cylindrical portion to be inclined to the discharge port, and the inclined passage defined between the extension and the second housing may be inclined toward the discharge port.

The inclined passage may be inclined at a first angle (? 1) set in the radial direction of the discharge port.

The injection hole may be inclined at a second angle? 2 set in the radial direction of the discharge port. The plurality of ejection holes may be provided along the circumferential direction of the ejection orifice.

The extended passage portion is formed in the cylindrical portion to have the same diameter and is connected to the discharge port in the radial direction, and the passage set between the extended portion and the second housing can be directed to the discharge port in the radial direction.

A urea water supply line is connected to a supply port of the second housing, and a flow control member for interrupting and regulating supply of urea water may be installed in the urea water supply line.

As described above, according to an embodiment of the present invention, the particulate matter or the fine dust (PM) is removed by regenerating the soot filter (DPF) with the plasma burner, ammonia pyrolyzed in the urea water injected from the plasma nozzle is supplied to the SCR catalyst Nitrogen can be removed.

Thus, one embodiment uses a plasma burner and a plasma nozzle to miniaturize the exhaust gas aftertreatment system of a diesel engine and can save fuel consumed in a plasma burner that raises the temperature of the exhaust gas supplied to the DPF filter .

FIG. 1 is a configuration diagram of a system for simultaneously reducing NO x and NO x in a diesel engine using plasma according to an embodiment of the present invention. Referring to FIG.
Fig. 2 is a perspective view of the plasma nozzle applied to Fig. 1. Fig.
3 is a sectional view taken along line III-III in Fig.
4 is a cross-sectional view taken along the line IV-IV in FIG.
5 is a cross-sectional view of another plasma nozzle applied to FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

FIG. 1 is a configuration diagram of a system for simultaneously reducing NO x and NO x in a diesel engine using plasma according to an embodiment of the present invention. Referring to FIG. Referring to FIG. 1, a system for reducing NOx and PM in a diesel engine using plasma according to an embodiment of the present invention includes an exhaust pipe 1 connected to a diesel engine (not shown) (Hereinafter referred to as "DPF filter") 2, a plasma burner 3, a selective reduction catalyst (hereinafter referred to as "SCR catalyst") 4 and a plasma nozzle 5.

A diesel engine generates power by using diesel as a fuel, and exhaust gas containing particulate matter or fine dust (PM, at least one of particulate matter and fine dust in the entire specification is referred to as PM) and nitrogen oxide (NOx) . Particulate matter or particulate matter PM contained in the exhaust gas passing through the exhaust pipe 1 is collected and burned and removed in the DPF filter 2 and nitrogen oxides contained in the exhaust gas are removed from the SCR catalyst 4 with water It is decomposed into nitrogen.

The DPF filter 2 is configured to collect particulate matter or particulate matter (PM) contained in the exhaust gas while circulating the exhaust gas, and to burn and remove particulate matter or fine dust by the temperature of the exhaust gas. The SCR catalyst 4 is configured to exchange the nitrogen oxide contained in the exhaust gas with nitrogen and water while circulating the exhaust gas via the DPF filter 2.

The plasma burner 3 is arranged inside the exhaust pipe 1 at the inflow side of the DPF filter 2 and is configured to heat the exhaust gas passing through the exhaust pipe 1. Since the heated exhaust gas passes through the DPF filter 2, the particulate matter and fine dust PM collected in the DPF filter 2 are burned and removed.

For example, the plasma burner 3 forms a plasma flame by using supplied air and fuel, heats the exhaust gas with a plasma flame to burn particulate matter or particulate matter PM collected in the DPF filter 2 . At this time, since the plasma burner utilizes the plasma flame, the fuel consumed for raising the temperature of the exhaust gas supplied to the DPF filter 2 can be saved.

That is, the plasma burner 3 burns the particulate matter and particulate matter PM collected in the DPF filter 2 to regenerate the DPF filter 2, so that the particulate matter and fine particulate matter discharged to the exhaust pipe 1 through the exhaust gas, It is possible to reduce the dust PM.

The plasma nozzle 5 is disposed inside the exhaust pipe 1 between the discharge side of the DPF filter 2 and the inlet side of the SCR catalyst 4 to effectively decompose the nitrogen oxides contained in the exhaust gas.

Namely, the exhaust gas from which the particulate matter and the fine dust PM are removed from the DPF filter 2 flows into the plasma nozzle 5 and the SCR catalyst 4. Therefore, the nitrogen oxides can be decomposed in the SCR catalyst 4 without interfering with particulate matter or particulate matter (PM).

For example, the plasma nozzle 5 generates plasma arc by using air as a discharger, pyrolyzes the plasma arc urea water to spray atomized and pyrolyzed ammonia on the inlet side of the SCR catalyst 4, .

The plasma nozzle 5 supplies ammonia pyrolyzed in urea water to the SCR catalyst 4 to remove nitrogen oxides, thereby effectively reducing the final nitrogen oxides discharged to the exhaust pipe 1 through the exhaust gas.

FIG. 2 is a perspective view of a plasma nozzle applied to FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. Referring to FIGS. 2 and 3, the plasma nozzle 5 includes a first housing 10, a second housing 20, a driving electrode 30, and a wall 40.

The first housing 10 has a discharge port H1 narrowed to one side so as to discharge compressed air supplied to one side at a high speed. The first housing 10 is configured to receive compressed air from the opposite side of the discharge port H1 and to quickly discharge the compressed air to the discharge port H1. The first housing 10 and the discharge port H1 are electrically grounded.

The second housing 20 is provided around the discharge port H1 of the first housing 10 and supplies the urea water supplied through the spray hole H2 through the wall of the discharge hole H1 to the discharge port H1 Is formed. For example, the second housing 20 may be formed as an integral structure of a shape similar to that of the first housing 10 toward the ejecting direction of the ejection opening H1.

The driving electrode 30 is provided at the center of the first housing 10 so as to form a discharge gap G between the end portion thereof and the discharge port H1 to discharge air between the driving electrode 30 and one side of the discharge port H1 To act as a discharge body to cause a plasma discharge. To this end, a driving voltage (HV) is applied to the driving electrode (30). The driving electrode 30 is disposed along the center of the first housing 10.

The wall 40 seals one side of the first housing 10 on the opposite side of the discharge port H1 and insulates and supports the driving electrode 30. [ The wall 40 may be formed of an electrically insulating material having heat resistance capable of withstanding the high temperature of the exhaust gas. The wall (40) has an air supply port (41) for supplying air. The air supply port 41 is connected to an air supply line 43 to a compressor 42 that supplies compressed air.

Hereinafter, the plasma nozzle 5 will be described in more detail. The first housing 10 includes a cylindrical portion 12 and an extended passage portion 13 which are sequentially formed along the direction in which compressed air is supplied.

The cylindrical portion 12 forms a circular passage having a uniform diameter on the side of the air supply line 43 for supplying air and is sealed by the wall 40 on the opposite side of the discharge port H1. Therefore, the compressed air supplied to the air supply line 43 is discharged to the discharge port H1.

The extension passage portion 13 extends to the end of the cylindrical portion 12 and is connected to the discharge port H1. For example, the extended passage portion 13 may be connected to the cylindrical portion 12 and gradually reduced at the end of the cylindrical portion 12, and may be connected to the discharge port H1 in an inclined manner.

The end of the minimum passage in the extension passage portion 13 is connected to the discharge port H1. That is, the end point of the extension passage portion 13 becomes the start point of the discharge port H1. The inclined passage P set between the extension passage portion 13 and the second housing 20 is inclined toward the discharge port H1.

The cylindrical portion 12 further includes a hub 14 connected to the inside of the cylindrical portion 12 in the center direction and supporting the driving electrode 30 at the center. The hub 14 is connected to the cylindrical portion 12 and the extended passage portion 13 through the air supplied to the air supply port 41 of the first housing 10, Thereby supporting the electrode 30. The driving electrode 30 is electrically connected to the driving voltage HV and electrically insulated from the first housing 10 by the insulating member 15 and the wall 40. [

The driving electrode 30 is connected to the high voltage power 44 (see FIG. 1) from the outside of the first housing 10 and receives the driving voltage HV. The driving electrode 30 is connected to the start portion of the discharge hole H1, 13) and the end of the driving electrode (30). The discharge gap G is set in the direction of air flow.

The discharge port H1 extends further from the end of the extension passage portion 13 of the first housing 10 and has the same size as the minimum passage of the extension passage portion 13. [ The discharge port H1 has a length D set at the end of the first housing 10 and a length L set toward the end of the second housing 20. [

The urea water supplied through the second housing 20 is injected into the discharge port H1 through the spray hole H2. The spray holes H2 may be provided in plural along the longitudinal direction of the discharge port H1. In addition, a plurality of spray holes H2 may be provided along the circumferential direction of the discharge port H1.

That is, the ejection holes H2 are formed in one layer or a plurality of layers with the ejection opening H1 as a center, and are formed in a plurality of layers in each layer to form a fine structure that ejects urea water. For example, the ejection opening H1 may be set to a diameter of 0.1 to 3 mm, and the ejection hole H2 may be set to a diameter of 0.0 to 0.5 mm.

Accordingly, the number of urea to be supplied is injected through the plurality of injection holes H2 arranged along the air flow direction in the discharge port H1 and at the same time, the center of the discharge port H1 in the circumferential direction of the discharge port H1 . At this time, the air supplied to the first housing 10 flows along the discharge port H1.

The size and number of the injection holes H2 set the flow rate of the number of injected elements. The length L of the discharge hole H1 sets the speed and range of atomizing and pyrolyzing the urea water by the heat generated by the plasma arc using air and the flow excitation species. Since the plasma arc is generated and the urea water is sprayed through the spray hole H2, the length L of the discharge hole H1 for spraying and pyrolyzing the urea water can be shortened.

On the other hand, the urea water supply line 21 is connected to one side supply port 23 of the second housing 20. The urea water supply line 21 is provided with a flow rate control member 22 for controlling the supply of urea water through the urea water supply line 21 and adjusting the flow rate of the urea water to be supplied.

The flow control member 22 controls the amount of urea water supplied to the second housing 20, and can precisely control the quantity of urea. Accordingly, the amount of the urea water flowing into the second housing 20 via the flow control member 22 can be minimized.

The flow control member 22 may be constituted by a solenoid valve or an injector in order to control the opening of the passage in the urea water supply line 21 to control the supply amount of the urea water. The size of the chamber and the size of the injection hole H2 set between the first housing 10 and the second housing 20 can be variously set.

On the other hand, the inner passage of the extension passage 13 of the first housing 10 and the inner wall of the second housing 20 facing the extension passage 13 form an inclined passage P having a structure narrowing along the discharge direction of the discharge hole H1. For example, the inclined passage P formed between the extended passage portion 13 and the second housing 20 is inclined at a first angle? 1 set with respect to the radial direction of the first housing 10.

4 is a cross-sectional view taken along the line IV-IV in FIG. 4, the injection hole H2 is formed to be inclined at a second angle? 2 set with respect to the radial direction of the first housing 10 toward the center of the discharge port H1, and a plurality of injection holes H2 are connected to one sloped passage P at the outer periphery of the discharge port H1. The first angle? 1 and the second angle? 2 may be the same or may be independent of each other.

That is, the injection hole H2 is inclined at the second angle? 2 in the inclined passage P between the extension passage portion 13 and the second housing 20 so as to be inclined with respect to the discharge direction of the discharge hole H1, Spray water. Therefore, the air flowing into the discharge port H1 is mixed with the urea water injected into the injection hole H2, and the air is injected at the second angle 慮 2 set through the injection hole H2, And can be discharged to the discharge port H1.

For example, the second angle 2 of the injection hole H2 may be set to a value between 0 and 90 degrees (not including 90 degrees). Therefore, the number of urea injected into the injection hole H2 can be injected into the discharge port H1 at the set second angle? 2.

That is, in the plasma nozzle 5, the urea water is atomized by the effect of the one-fluid nozzle while the urea water passes through the injection hole H2, and by the flow effect of the two fluids as the air passes through the discharge hole H1, It can be quickly and uniformly atomized into the air.

Further, in the plasma nozzle 5, due to the chemical effect of the air molecules in the excited state due to the plasma discharge, the thermal effect by the plasma arc of the plasma discharge, and the physical effect by the plasma arc jet, As shown in FIG.

In other words, the nitrogen oxide and monomolecular simultaneous reduction system of the diesel engine using the plasma of the embodiment regenerates the DPF filter 2 by the plasma flame of the plasma burner 3 and regenerates the DPF filter 2 from the urea water of the plasma nozzle 5, The ammonia can be quickly mixed with the exhaust gas.

Therefore, the heated exhaust gas is supplied to burn particulate matter or particulate matter (PM) in the DPF filter 2, and nitrogen oxide (NOx) can be effectively removed from the SCR catalyst 4.

 That is, in a short time, and at a short distance between the diesel engine and the SCR catalyst 4, the exhaust gas can be introduced into the SCR catalyst 4 in a state of being uniformly mixed with ammonia. Therefore, the size and length of the exhaust pipe 1 for reducing the emission amount of nitrogen oxides can be drastically reduced, the space for installing the plasma nozzle 5 can be efficiently secured, and the number of elements can be reduced.

Air is supplied to the first housing 10 and urea water is supplied to the supply port 23 of the second housing 20 through the urea water supply line 21 so that the discharge port H1 and the first housing 10, When the driving voltage HV is applied to the driving electrode 30 in the state of being grounded, atomized and pyrolyzed ammonia is discharged through the discharge port H1.

The plasma arc jet generated between the driving electrode 30 and the discharge port H1 and discharged into the discharge port H1 can be driven by an AC or DC drive voltage. When a plasma arc jet is generated using a direct current (DC) power source, the coagulation of the urea water is prevented by the charging phenomenon of the atomized urea water droplet, and the urea water quantity can be finely and quickly atomized.

In addition, in the case of generating a plasma arc jet by using an alternating current (AC) power source, the lifetime of the driving electrode 30 is relatively long as compared with a direct current power source, and a plasma arc jet of a larger volume is generated have.

The discharge port H1 through which the plasma arc jet is discharged has a diameter D of several millimeters (for example, 0.1 to 3 mm) and is applied in various sizes ranging from a large marine diesel engine requiring injection of urea water to mid- It can be applied to various injection quantity of urea number.

Referring again to Fig. 1, a compressor 42 for supplying air to the first housing 10 is connected to an air supply line 43 to supply air to the plasma burner 3. The high voltage power 44 for applying the driving voltage HV to the driving electrode 30 is connected to supply the driving voltage HV to the plasma burner 3.

That is, in the nitrogen oxide and the simultaneous reduction system of the diesel engine using the plasma of the embodiment, the plasma burner 3 for regenerating the DPF filter 2 and the compressor 42 for supplying air to the plasma nozzle 5 for spraying the urea water And share the high voltage power 44 that supplies the driving voltage HV, simplifying the configuration for exhaust gas post-treatment and minimizing power consumption.

5 is a cross-sectional view of another plasma nozzle applied to FIG. 5, the inner wall of the second housing 220 facing the extension passage 213 of the first housing 210 and the inner wall of the second housing 220 facing the discharge passage H21 are perpendicular to the discharge direction of the discharge hole H21 .

For example, the passage P2 formed between the extension passage portion 213 and the second housing 220 is formed in the radial direction of the first housing 210. That is, FIG. 5 shows that the value corresponding to the first angle? 1 in FIG. 3 is zero.

Therefore, the air discharged to the discharge port H21 can receive a larger resistance in the elongated passage portion 213 formed at a right angle than the inclined elongated passage portion 13 in FIG. However, the spray hole H22 is formed between the drive electrode 30 and the discharge hole H21 toward the center of the discharge hole H21 and inclined at a second angle? 22 set with respect to the radial direction of the first housing 210 , And the plurality of ejection holes (H22) are connected by a single passage (P2) at the outer periphery of the ejection opening (H21).

That is, the injection hole H22 is inclined at the second angle? 22 in the path P2 between the extension passage portion 213 and the second housing 220 so as to be inclined with respect to the discharge direction of the discharge port H21, .

Therefore, the air flowing into the discharge port H21 is mixed with the urea water injected into the injection hole H22, and the air is injected at the second angle 慮 22 set through the injection hole H22, And is discharged to the discharge port H21.

The driving electrode 30 has a discharge gap G2 between its end portion and the discharge port H21 so that the air supplied to one side between the discharge port H21 and the one side of the discharge port H21 acts as a discharger, do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And it goes without saying that the invention belongs to the scope of the invention.

1: exhaust pipe 2: exhaust filter (DPF filter)
3: Plasma burner 4: Selective reduction catalyst (SCR catalyst)
5, 205: plasma nozzle 10, 210: first housing
12: cylindrical portion 13, 213: extension passage portion
14: hub 15: insulating member
20, 220: second housing 21: urea water supply line
22: flow rate control member 23:
30: driving electrode 40: wall
41: air supply port 42: compressor
43: air supply line 44: high voltage power
213: extension passage portion D: diameter
G, G2: discharge gap H1, H21: discharge port
H2, H22: injection hole HV: driving voltage
L: length P: slope passage
P2: passage? 1: first angle
? 12,? 22: second angle

Claims (13)

An exhaust pipe for distributing the exhaust gas of the diesel engine;
A particulate filter (DPF filter) installed in the exhaust pipe and collecting particulate matter or fine dust contained in the exhaust gas;
A plasma burner installed in the exhaust pipe on an inlet side of the DPF filter for heating the exhaust gas with a plasma flame to burn particulate matter or fine dust collected in the DPF filter;
A selective reduction catalyst (SCR catalyst) installed on a discharge side of the DPF filter of the exhaust pipe; And
A plasma nozzle disposed inside the exhaust pipe at an inlet side of the SCR catalyst for injecting ammonia produced by atomizing and pyrolyzing the plasma arc urea water into the inlet side of the SCR catalyst and mixing the ammonia with the exhaust gas;
NOx and PM Simultaneous Reduction System of Diesel Engines Using Plasma.
The method according to claim 1,
In the plasma nozzle,
A first housing which discharges the supplied compressed air to a discharge port that is narrowed and is electrically grounded,
A second housing provided around the discharge port of the first housing for spraying the urea water supplied through the spray hole into the discharge port,
A drive electrode embedded in the first housing and forming a discharge gap between the end portion and the discharge port, to which a drive voltage is applied;
And an air supply port for sealing one side of the first housing on the opposite side of the discharge port and insulatingly supporting the drive electrode and supplying the air,
NOx and PM Simultaneous Reduction System of Diesel Engines Using Plasma.
3. The method of claim 2,
The compressor for supplying air to the first housing
Wherein the plasma is connected to an air supply line to supply air to the plasma burner.
The method of claim 3,
The high voltage power for applying a driving voltage to the driving electrode
And a system connected to supply a driving voltage to the plasma burner.
3. The method of claim 2,
The first housing includes:
A cylindrical portion formed on the air-supplied side and sealed by the wall, and
An extension passage portion extending from an end of the cylindrical portion and connected to the discharge port,
NOx and PM Simultaneous Reduction System of Diesel Engines Using Plasma.
6. The method of claim 5,
The cylindrical portion
And a hub connected to the center of the cylindrical portion and supporting the driving electrode at a center thereof,
The hub
And the driving electrode is supported via the insulating member
Nitrogen Oxides and P - M Simultaneous Reduction System of Diesel Engines Using Plasma.
6. The method of claim 5,
The discharge port
A second housing having a length set toward an end of the second housing,
The injection hole
And a plurality of discharge ports
Nitrogen Oxides and P - M Simultaneous Reduction System of Diesel Engines Using Plasma.
6. The method of claim 5,
The extension passage
And is gradually reduced in the cylindrical portion and is slantly connected to the discharge port
The inclined passage, which is set between the first housing and the second housing,
The discharge port
Nitrogen Oxides and P - M Simultaneous Reduction System of Diesel Engines Using Plasma.
9. The method of claim 8,
The inclined passage
Wherein the plasma is generated at a first angle (? 1) set in a radial direction of the discharge port.
8. The method of claim 7,
The injection hole
And a second angle (? 2) set in a radial direction of the discharge port.
11. The method of claim 10,
The injection hole
Wherein the plurality of plasma oxides are provided along the circumferential direction of the discharge port.
6. The method of claim 5,
The extension passage
The cylindrical portion being formed to have the same diameter and being connected to the discharge port in the radial direction,
The passage, which is set between the first housing and the second housing,
A system for reducing nitrogen oxide and ammonia in a diesel engine using plasma directed to the discharge port in the radial direction.
3. The method of claim 2,
A urea water supply line is connected to a supply port of the second housing,
Wherein the urea water supply line is provided with a flow rate control member for interrupting and controlling the supply of urea water to the nitrogen oxide and ammonia reduction system of the diesel engine.

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