KR20000019461U - Diesel engine emission smoke purification system - Google Patents

Abstract

The present invention relates to a soot purification device of a diesel engine, the present invention is composed of a metal combustion network (22) made of stainless steel or composite metal filtration member 20 for collecting and burning the soot in the soot purification device of a diesel engine. However, to maintain a particle size of 150 ~ 400 mesh, so that the interval (T) between each of the metal combustion network 22 to maintain about 3 ~ 10mm, and the inlet end 26 and the respective metal combustion network 22 The discharge stage 28 is alternately closed, and according to the present invention, the filtration member 20 used for the filtration regeneration unit 30 is composed of a metal combustion network 22 instead of a ceramic filter medium, so that the first and second filter materials are used. By collecting and burning soot and particulate matter in the live parts 32 and 34 repeatedly, not only can the exhaust gas be easily and completely regenerated, but also there is little damage due to external impact of the filtration member 20, Regeneration of the exhaust gas due to easy regeneration Particulate matter or soot is completely burned and there is no substance remaining after regeneration, so that the back pressure of the filtration regeneration unit is not increased. Therefore, the soot purification ability can be maintained for a long time, and the durability of the filtration member 20 can be improved. The effect is provided.

Description

DIESEL ENGINE EMISSION SMOKE PURIFICATION SYSTEM}

The present invention relates to a soot purifier of a diesel engine, and in particular, a filtration member of a soot purifier that collects and re-combusts the exhaust gas discharged from an engine and re-combustes it by a heater. By exhausting the inlet end and the outlet end of the metal combustion network alternately so that the exhaust gas introduced to the inlet end side passes through the wall of each metal combustion network and is discharged to the outlet end side, soot contained in the exhaust gas passing through the filtering member. The present invention relates to a particulate matter purification apparatus of a diesel engine capable of improving the collection properties of particulate matter and preventing a sudden rise of back pressure acting on the purification apparatus.

In general, the fume purification device of a diesel engine is configured to heat particulate matter filtered on a filter medium with a heating line or a burner, and supply air to a blower to burn the deposited particulate matter. By minimizing or preventing emissions to the air, it has a function of minimizing air pollution.

Such a soot purifying apparatus mainly uses a ceramic filter as a filter material. In the case of using the ceramic filter, the temperature rises rapidly due to the burning of unburned hydrocarbon or particulate matter at a time, and thus the filter material of the ceramic filter is broken. There was a problem that the life of the filter medium is shortened.

In addition, in the case of using the ceramic filter, it is difficult to completely burn the particulate matter, the particulate matter was deposited on the ceramic filter, thereby increasing the back pressure in the soot purifier to decrease the engine output.

The present invention is devised to solve the problems of the prior art as described above, the technical problem of the present invention is to form a filter material used in the exhaust gas purification device of a diesel engine made of a metal material to facilitate the collection of particulate matter, It is possible to extend the life of the filter medium by minimizing damage due to high heat, and to provide a complete combustion of the collected particulate matter to prevent the rise of the back pressure inside the purification device to provide a diesel engine soot purification device. .

The technical problem of the present invention as described above is to communicate with the first exhaust gas inlet and the second exhaust gas inlet branched to both sides in communication with the engine side, the first exhaust gas inlet and the second exhaust gas inlet A primary filter regeneration unit installed in communication with the primary filtration regeneration unit, the filtration regeneration unit including a first filtration regeneration unit and a second filtration regeneration unit formed with a filtration member, and valves installed at branch points of the first and second exhaust gas inlet units. And a heater installed in the first and second filtration regenerative units, a pressure sensor installed at the inlet and the outlet of the first and second filtration regenerative units, and the respective pressure sensing sensors to inflow the first and second exhaust gases. It is made of a control unit for controlling the valve so that the discharge gas is selectively introduced into the unit and at the same time by controlling the heater on the side of the filter regeneration unit with the inlet is closed to burn the collected soot and particulate matter The filtering member is inserted into a plurality of metal combustion networks formed in a hollow shape with different sizes so as to form concentric circles at intervals from each other, and the exhaust gas flowing into the inlet side passes through the wall of each metal combustion network and discharges to the outlet side. It is possible to achieve by providing a soot purification apparatus of a diesel engine, characterized in that the inlet and outlet ends of each of the metal combustion network is alternately closed.

At this time, the inlet end and the outlet end of each of the metal combustion network is characterized in that the fusion is supported by a supporting member formed to cross radially, the interval between each of the metal combustion network is characterized in that 3 ~ 10mm, The particle size of the metal combustion network is characterized in that 150 ~ 400 mesh, wherein the control unit is characterized in that for 18 to 25 minutes to apply power to the heater, the valve is detected by the pressure sensor When the inlet and outlet pressure difference of one exhaust gas is 250 ~ 400mm bar (millibar), it is characterized in that the operation is switched by the control unit.

In addition, each of the inlet and outlet end is characterized in that the closing member is alternately closed, the mat is installed on the outer surface of the filter member so that each metal combustion network withstands the discharge pressure and thermal expansion of the exhaust gas during exhaust gas regeneration It is characterized by.

1 is a schematic view showing a soot purification apparatus of a diesel engine according to the present invention.

FIG. 2 is an exploded perspective view showing a filtration member of the soot purifying apparatus shown in FIG. 1.

3 is a cross-sectional view illustrating a coupling state of the filtering member illustrated in FIG. 2.

Figure 4 is a sectional view showing another embodiment of the filtration member shown in FIG.

<Description of the code | symbol about the principal part of drawing>

12: first exhaust gas inlet 14: second exhaust gas inlet

20: filter member 22: metal combustion network

24: wall 26: inlet end

28 discharge stage 30 filter regeneration unit

32: first filtration regeneration unit 34: second filtration regeneration unit

40: valve 50: heater

60A, 60B: Pressure sensor 70: Control part

80: support member 90: closure member

The present invention having the features as described above will be described in detail with reference to the accompanying drawings.

As shown in Figure 1 to Figure 3 of the accompanying drawings, the particulate matter purification apparatus of the diesel engine according to the present invention is provided with a filtration member 20 formed of a metal, such a filtration member 20 and the peripheral components When described in more detail as follows.

The first exhaust gas inlet 12 and the second exhaust gas inlet 14 of the exhaust gas purification device are formed by diverging exhaust pipes on both sides of the engine to communicate with the engine.

At the branch point of the first exhaust gas inlet 12 and the second exhaust gas inlet 14, the gas discharged from the engine is transferred to the first exhaust gas inlet 12 or the second exhaust gas inlet 14. The valve 40 made to allow the flow rate or to adjust the flow rate is installed.

In this case, the valve 40 may be separately installed at the inlet side of the first and second exhaust gas inlets 12 and 14, respectively.

Primary filter regeneration units 18 and 19 are provided at one side of the first and second exhaust gas inlets 12 and 14, and a first filter regeneration unit 1 is provided at one side of the primary filter regeneration units 18 and 19. A filter regeneration unit 30 consisting of 32) and a second filtration regeneration unit 34 is provided.

The first and second filtration regeneration units 32 and 34 are configured to filter the discharge gas passing through the inside thereof, and the pressure sensing sensors 60A and 60B are installed at the inlet side and the outlet side thereof, respectively. It detects the pressure and the pressure of the regenerated gas.

In addition, a filtration member 20 is installed inside the first and second filtration regeneration units 32 and 34 to collect soot and particulate matter from the discharged gas, and a heater 50 is installed at the outlet side. At the periphery of the member 20, that is, the outer surface, a mat 29 is installed to allow the filtration member 20 to withstand the discharge pressure of the exhaust gas and thermal expansion.

At this time, the filtering member 20 is inserted into a plurality of metal combustion network 22 formed in a hollow shape with a different size to form a concentric circle keeping the distance (T) from each other, toward the inlet side of the filtering member (20) The inlet end 26 and the outlet end 28 of each metal combustion network 22 are alternately closed so that the introduced exhaust gas passes through the wall surface 24 of each metal combustion network 22 to the outlet side. The metal combustion network 22 may be formed of stainless steel or a composite metal.

That is, each of the metal combustion networks 22 has a shape interconnected by the closing member 90 to have a zigzag shape in the longitudinal direction.

In other words, as shown in FIG. 3 of the accompanying drawings, the inlet end 26 and the outlet end 28 of each metal combustion network 22 are alternately closed by a plurality of closing members 90. Exhaust gas introduced to the inlet end 26 is configured to be discharged to the outlet end 28 only after passing through the wall surface 24 of each metal combustion network 22.

The particle size of such a metal combustion network 22 is preferably 150 to 400 mesh.

As described above, in the state where each of the metal combustion networks 22 are configured to be connected in a zigzag pattern, the closing members 90 are fused and fixed to the support members 80 formed to cross each other.

That is, as shown in FIG. 2, the support member 80 in the state in which each closing member 90 is fused and fixed to the inlet end 26 and the outlet end 28 of each metal combustion network 22. By being fused and fixed to, both sides of each of the metal combustion network 22 is firmly supported by the support member 80 to maintain a constant distance from each other.

At this time, the spacing (T) between the metal combustion network 22 is preferably about 3mm to 10mm.

On the other hand, as shown in Figure 4, each of the inlet end 26 and the discharge end 28 is formed integrally, the inlet side and the outlet side is configured in a zigzag connection so that the inlet side and the outlet side is alternately closed In this way, the production of the metal combustion network 22 can be facilitated.

The control unit 70 which receives the detection signal of the pressure sensor 60A, 60B discharges when the difference between the pressure at the inlet side and the outlet side detected by the pressure sensor 60A, 60B is out of a prescribed value. The valve 40 is operated to selectively introduce gas into the first filtration regeneration unit 32 or the second filtration regeneration unit 34, and the heater 50 on the side of the exhaust gas inlet 12 and 14 on the closed side. Is configured to selectively operate.

Referring to the operation of the present invention configured as described above in detail based on the accompanying drawings as follows.

As shown in FIG. 1, when the exhaust gas flows from the engine to the first exhaust gas inlet 12 communicating with the exhaust pipe of the engine by the valve 40, the discharged gas is introduced into the first exhaust gas. Passing through the primary filtration regeneration unit 18 on the side of the portion 12 is introduced into the first filtration regeneration unit 32 of the filtration regeneration unit 30 passes through the filtration member 20.

At this time, the pressure sensor 60A of the first filtration regeneration unit 32 senses the pressure at the inlet side and the outlet side of the first filtration regeneration unit 32 and sends a detection signal to the control unit 70. .

3 illustrates a state in which gas discharged from the engine passes through the filtration member 20.

As shown, after the exhaust gas introduced between the metal combustion network 22 of the first filtration regeneration unit 32 is introduced between the inlet end 26 of each of the metal combustion network 22, the closing member ( 90 is discharged to the discharge end 28, which is not discharged immediately toward the discharge end 28, which is closed by 90, but passes through the wall 24 of each metal combustion network 22, and thus is discharged. The unburned hydrocarbons and particulate matter contained in the adhesive are collected by being adhered to the respective wall surfaces 24 while passing through the wall surfaces 24 of the respective metal combustion networks 22.

Therefore, the exhaust gas passing through the filtration member 20 is filtered through each of the metal combustion networks 22 so that only clean air can be discharged.

At this time, the unburned hydrocarbons and particulate matter of the exhaust gas introduced into the filtering member 20 can be easily collected in each metal combustion network 22 having a sufficient surface area and an appropriate particle size. 20) has a sufficient surface area and can easily collect the particulate matter, the plurality of metal combustion network 22 formed with a particle size of 150 ~ 400 mesh inserted and installed so as to overlap at a constant interval (T) This is because a sufficient surface area is provided in a limited space.

If the spacing T between each of the metal combustion networks 22 is too small, it becomes vulnerable to thermal expansion during regeneration of the exhaust gas, and if the spacing T is large, it does not provide sufficient surface area in a limited space. Therefore, as for the space | interval T between each metal combustion network 22, 3-10 mm is preferable.

As described above, when the exhaust gas flows into the first filtration regeneration unit 32 and the unburned hydrocarbon and the particulate matter adhere to the wall surface 24 of the metal combustion network 22, the first filtration regeneration unit 32 The difference between the inlet pressure and the outlet pressure is generated, and the difference in pressure is detected by the pressure sensor 60A and input to the controller 70.

As such, when the difference between the inlet side pressure and the outlet side pressure of the first filtration regeneration unit 32 sensed by the pressure detecting sensor 60A is greater than a set value, the controller 70 operates the valve 40. The valve 40 closes the first exhaust gas inlet 12 and opens the second exhaust gas inlet 14 so that the exhaust gas discharged from the engine flows into the second filtration regeneration unit 34. .

At the same time, the control unit 70 applies the power to the heater 50 on the side of the first filtration regeneration unit 32 for 18 to 25 minutes, and the unburned hydrocarbons collected on the wall 24 of each of the metal combustion networks 22. And particulate matter is burned.

That is, the valve 40 controlled by the controller 70 closes the first exhaust gas inlet 12 according to the detection signal of the pressure sensor 60A, and the second exhaust gas inlet unit ( By opening 14), the discharged gas discharged is introduced into the second discharge gas inlet 14 and passes through the second filtration regeneration unit 34 while particulate matter is formed on each side of the second filtration regeneration unit 34. The particulate matter collected in each of the metal combustion networks 22 of the first filtration regeneration unit 32 is collected by the desired 22 and thus burned by the heater 40 operated by the controller 70. Will be.

As described above, when the particulate matter collected in the metal combustion network 22 on the first filtration regeneration unit 32 side is burned, the metal combustion network 22 on the side of the second filtration regeneration unit 34 is included in the exhaust gas. The particulate matter is adhered and collected while passing through the wall surface 24, and then, when the particulate matter collected in the metal combustion network 22 on the side of the second filtration section 34 is burned, the first filtration section ( 32) the particulate matter is collected as the exhaust gas passes through the metal combustion network 22, so that the first and second filtration regeneration units 32 and 34 alternately collect or burn the particulate matter. For example, the exhaust gas from the engine is emitted to the atmosphere with the removal of soot or particulate matter.

In this case, the valve 50 is preferably to be switched when the inlet, outlet pressure difference of the discharge gas is about 250 ~ 400mm bar (millibar). This is because if the inlet / outlet pressure difference is too high, the back pressure is increased to give an excessive force to the engine, and when the pressure difference is too small, the power consumption is increased.

In addition, the time for which power is applied to the heater 50 is preferably about 18 to 25 minutes, if more than 25 minutes, the filter regeneration unit 30 is overheated to damage the filtration member 20, than 18 minutes If it is small, the captured unburned hydrocarbons and particulate matter will not be completely burned, causing an increase in back pressure.

The diesel engine soot purification apparatus according to the present invention can be used in diesel vehicles, ships, locomotives, industrial internal combustion engines, and the like.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments.

The present invention is not limited only to the embodiments to be described below, and the present invention may be more clearly defined by various modified embodiments.

In Example 1 and Comparative Example 1, the purification ability of the diesel engine particulate filter was investigated.

The diesel engine used is a commercially available in-line upright four-stroke engine. The combustion method is direct injection. The cylinder bore x stroke has 123 mm x 155 mm 6 cylinders, 11,051 cc, compression ratio 17.1: 1. The maximum torque / engine speed = 81.5Kgm / 1400RPM and the maximum output / engine speed = 780Nm / 2,200RPM were used. The smoke was measured using the EXL ∥-1628 exhaust analyzer from Firm Ware Technology. Test results were obtained after driving the D-13 mode.

Example 1

The first and second filtration regeneration units 32 and 34 used a cylindrical metal combustion network 22 having a length of 7.5 inches and an 8 inch length, and the particle size of the metal combustion network 22 used a mesh of 400 mesh. The space | interval T between each metal combustion network 22 was 5 mm. The valve 40 is a pressure sensor (60A, 60B) is to be switched when the pressure difference between the inlet and outlet side is 350mm bar, the valve 20 closes the first exhaust gas inlet 12, the second When the exhaust gas inlet 14 is opened, 24 volts of power is supplied to the heater 50 of the first filtration regeneration unit 32 for 20 minutes, so that each metal combustion network of the first filtration regeneration unit 32 side ( The soot collected in 22) is burned and regenerated, and the diesel engine soot purifier is used repeatedly.

Comparative Example 1

Except for using the first and second filter regeneration unit (32,34) 7.5 inch outer diameter ceramic filter medium having a length of 8 inches in Example 1 is the same diesel engine smoke purification device as in Example 1.

In Table 1, the performance of the diesel engine soot purifier and the amount of soot remaining on the surface of the filtration member 20 after running in the D-13 mode were investigated by blowing air in the reverse direction.

Table 1. Performance of diesel engine aftertreatment

division Smoke reduction rate (%) Reduction of particulate matter (%) The amount of soot remaining in the filter medium after running in D-13 mode (g) Example 1 98.7 85.8 0.0` Comparative Example 1 97.1 84.3 12.6

The exhaust gas purification device of the diesel engine according to the present invention uses a filtration member made of a metal combustion network instead of a ceramic filter material for the filtration member used in the filtration regeneration unit, so that damage due to external impact is small and regeneration is easy, thereby regenerating exhaust gas. When particulate matter or soot is completely burned at the time, there is no material remaining after regeneration, so that the back pressure of the filtration regeneration unit is not increased. Therefore, the soot purification ability can be maintained for a long time, and the useful effect of improving the durability of the filtration member is improved. Is provided.

Claims (8)

A first exhaust gas inlet 12 and a second exhaust gas inlet 14 branched to both sides in communication with the engine side; Primary filter regeneration units 18 and 19 installed in communication with the first exhaust gas inlet 12 and the second exhaust gas inlet 14; A filtration regeneration unit 30 formed to communicate with the primary filtration regeneration units 18 and 19 and including a first filtration regeneration unit 32 having a filtration member 20 and a second filtration regeneration unit 34; A valve 40 installed at a branch point of the first and second exhaust gas inlets 12 and 14; A heater 50 installed in the first and second filtration regeneration units 32 and 34; Pressure detection sensors (60A, 60B) installed at the inlet and outlet sides of the first and second filter regeneration units (32, 34); And It is operated by the pressure sensor (60A, 60B) to control the valve 40 so that the discharge gas selectively flows into the first and second exhaust gas inlet (12, 14) and the inlet is closed at the same time It consists of a control unit 70 for controlling the heater 50 on the filter regeneration unit 30 side to burn the collected soot and particulate matter, The filtration member 20 is inserted into a plurality of metal combustion network 22 formed in a hollow shape with a different size to form a concentric circle keeping a distance (T) from each other, the exhaust gas introduced to the inlet side of each metal combustion network ( 22. The soot purification device of the diesel engine, characterized in that the inlet end 26 and the outlet end 28 of each of the metal combustion network 22 are alternately closed so as to pass through the wall surface 24 of the 22. . The diesel engine of claim 1, wherein the inlet end 26 and the outlet end 28 of each of the metal combustion networks 22 are fused and supported by a support member 80 formed to cross radially. Soot Purifier. 2. The apparatus for purifying smoke of a diesel engine according to claim 1, wherein an interval (T) between the metal combustion networks (22) is 3 to 10 mm. The particulate matter purification apparatus of a diesel engine according to claim 1, wherein the particle size of each metal combustion network (22) is 150 to 400 mesh. According to claim 1, wherein the control unit 70 is a soot purifier of the diesel engine, characterized in that to apply power to the heater (50) for 18 to 25 minutes. According to claim 1, wherein the valve 50 is operated by the control unit 70 when the pressure difference between the input and output pressure of the discharge gas detected by the pressure sensor (60A, 60B) 250 ~ 400mm bar, it is switched A soot purification device for a diesel engine. The exhaust gas purification device of a diesel engine according to claim 1, wherein each of the inlet and outlet ends is alternately closed by a closing member. 2. The diesel engine according to claim 1, wherein a mat 29 is installed on an outer surface of the metal combustion network 22 so that each metal combustion network 22 withstands the discharge pressure and thermal expansion of the exhaust gas when the exhaust gas is regenerated. Angie's soot purifier.