KR20180126369A - Exhaust gas aftertreatment system and internal combustion engine - Google Patents

Abstract

The present invention relates to an exhaust gas post-treatment system (3) of an internal combustion engine (ICE), which provides an effective selective catalyst reduction (SCR) exhaust gas post-treatment system through miniaturization design. According to the present invention, the SCR exhaust gas post-treatment system comprises: an SCR catalyst converter (9) received in a reactor chamber (10); an exhaust gas supply line (80) led to reactor chamber (10) to be led to the SCR catalyst converter (9); an exhaust gas discharge line (11) to be away from the reactor chamber (10) so as to be away from the SCR catalyst converter (9); an intake apparatus (16) disposed in the exhaust gas supply line (8) to supply a reducing agent, in particular, ammonia and an ammonia precursor substance into exhaust gas; a mixing section (18) provided in a downstream of the inlet apparatus (16) by the exhaust gas supply line (18) in order to mix the reducing agent and the exhaust gas in an upstream of the inlet apparatus (16); a plurality of blowing apparatuses (24) blowing air to the SCR catalyst converter (9) to provide a medium used for cleaning; and a common compressor (25) for one blowing apparatus (24). The compressor (25) is extended in a circular or polygonal shape around the SCR catalyst converter (9) and the blowing apparatus (24), and the medium flowing into the SCR catalyst converter (9) to perform cleaning is supplied to the blowing apparatus (24) led from the common compressor (25).

Description

[0001] EXHAUST GAS AFTERTREATMENT SYSTEM AND INTERNAL COMBUSTION ENGINE [0002]

The present invention relates to an exhaust gas aftertreatment system for an internal combustion engine. The present invention also relates to an internal combustion engine having an exhaust gas aftertreatment system.

In the combustion process in a stationary internal combustion engine, for example in a power plant, and in the combustion process in a non-burning internal combustion engine, for example in a ship, nitrogen oxides are produced which are generally coal, pit coal, It is produced during combustion of sulfur-containing fossil fuels such as lignite, crude oil, heavy oil or diesel fuel. Thus, an exhaust aftertreatment system used for purification, especially for denitrification of exhaust gases from an internal combustion engine, is disposed in such an internal combustion engine.

In order to reduce nitrogen oxides in the exhaust gas, so-called SCR catalytic converters are mainly used in commonly known exhaust gas after-treatment systems. In the SCR catalytic converter, selective catalytic reduction of nitrogen oxides occurs and ammonia (NH ₃ ) is required as a reducing agent for the reduction of nitrogen oxides. For this purpose, an ammonia or ammonia precursor substance, for example urea, is introduced upstream of the SCR catalytic converter in the form of an exhaust gas liquid and the ammonia or ammonia precursor upstream of the SCR catalytic converter is introduced into the SCR catalytic converter And is mixed with the upstream exhaust gas. To this end, mixing sections are provided between the introduction of ammonia or ammonia precursors and the SCR catalytic converter according to practice.

There is a need to further improve the exhaust gas aftertreatment system, although exhaust aftertreatment, especially reduction of nitrogen oxides, has already been successfully achieved through an exhaust aftertreatment system comprising a commonly known SCR catalytic converter. In particular, there is a need to enable an effective exhaust aftertreatment system through the miniaturization design of such exhaust aftertreatment systems.

It is an object of the present invention to provide an exhaust gas aftertreatment system for a new type of internal combustion engine and an internal combustion engine having such an exhaust gas aftertreatment system.

This object is solved by an exhaust gas after-treatment system of an internal combustion engine according to claim 1. The exhaust aftertreatment system according to the present invention preferably comprises multiple blowers arranged in a reactor chamber used to blow clean to the SCR catalytic converter and the blower has an SCR A medium for blowing and cleaning the catalytic converter can be provided and the common accumulator extends in a circular or polygonal shape around the SCR catalytic converter and blower. The present invention is based on the knowledge that the SCR catalytic converter of an exhaust gas after-treatment system of an internal combustion engine operated, for example, with heavy fuel oil or residual oil, has a clogging property. Thus, a high ash proportion or soot proportion is present in the exhaust gas of such an internal combustion engine and ash or soot is triggered in the region of the SCR catalytic converter, resulting in clogging of the SCR catalytic converter . To prevent this, there is a blower for ash and clean soot in the SCR catalytic converter.

According to the prior art, when a blower is connected to a pressure line behind each other, different pressure conditions are formed in the feed compressed air system, depending on the position of each blower in operation. These different pressure conditions are caused by an upstream run-length of gas volumes of different sizes and different blowers, resulting in different pressure drops and / or different pressure rises in the case of reflected waves. As a result of this, considerably different purifying effects can be achieved through the blowers.

On the other hand, the blowing device according to the present invention uniformly supplies a medium for purifying by blowing the SCR catalytic converter from the common ring or polygonal accumulator to the SCR catalytic converter. With this symmetrical arrangement, the pressure drop and rise of all blowers are nearly identical and as a result they can achieve the same purifying effect. This is particularly advantageous for ash and soot-purified blowing in SCR catalytic converters.

The supply lines originating from the common accumulator extend to the respective blower, through which each blower is provided with a medium for cleaning by blowing to the SCR catalytic converter, preferably a switchable valve Respectively. Through a supply line extending from a common, circular or polygonal accumulator and extending to the blower, all the blowers are provided with a medium for cleaning by blowing to the SCR catalytic converters easily and reliably, And can be provided with a uniform pressure drop in the region.

According to an advantageous further improvement, the common accumulator extends out of the reactor chamber around the reactor chamber, and each supply line derived from the accumulator extends far into the blower through the walls of the reactor chamber. In particular, also when the common accumulator extends around the reactor chamber, the common accumulator is located outside the actual reactor chamber, and then the blower disposed in the reactor chamber is blown into the SCR catalytic converter to supply the medium for cleaning , The supply line extends through the walls of the reactor chamber.

According to an advantageous further improvement, the common accumulator is closed and extended in the circulating direction around the SCR catalytic converter and preferably the blower located in the reactor chamber, the accumulator is preferably formed of a circular or polygonal tube, The tube of circular or polygonal shape is closed and extended around the SCR catalytic converter and the blower located in the reactor chamber, and is preferably closed and extended in the circulating direction around the reactor chamber. By means of an accumulator closed in the circulating direction, for example in a direction not blocked at any circumferential position, all blowers can be provided with a particularly advantageous medium for cleaning by blowing to the SCR catalytic converter.

An internal combustion engine according to the present invention is defined in claim 9.

Preferred further improvements of the invention are obtained from the dependent claims which can be explained next. Exemplary embodiments of the present invention are not limited thereto but are described in more detail by the drawings.
Figure 1 shows a schematic perspective view of an internal combustion engine having an exhaust aftertreatment system according to the present invention.
Figure 2 shows details of the exhaust aftertreatment system of Figure 1;
Figure 3 shows details from an exhaust aftertreatment system according to the present invention.
Figure 4 shows details from an exhaust aftertreatment system according to another embodiment of the present invention.

The present invention relates to an exhaust gas aftertreatment system of an internal combustion engine, for example, a stationary internal combustion engine in a power plant or a non-fixed internal combustion engine used in a ship. In particular, the exhaust gas aftertreatment system is used in internal combustion diesel engines of heavy oil-operated vessels.

1 shows an arrangement from an internal combustion engine 1 having an exhaust gas turbocharging system 2 and an exhaust gas aftertreatment system 3. The internal combustion engine 1 is a non-fixed or stationary internal combustion engine, particularly a non-fixed operation internal combustion engine of a ship. The exhaust gas discharged from the cylinder of the internal combustion engine 1 is subjected to exhaust gas supercharging to extract mechanical energy for compressing the charge air supplied from the thermal energy of the exhaust gas to the internal combustion engine 1, Is used in the system (2).

1 shows an internal combustion engine 1 with an exhaust gas turbocharging system 2 and an exhaust gas turbocharging system 2 comprises a plurality of exhaust gas turbochargers, namely a first high pressure side exhaust gas turbocharger 4 and a second low-pressure side exhaust gas turbocharger 5. The exhaust gas discharged from the cylinder of the internal combustion engine 1 flows first through the high pressure turbine 6 of the expanded first exhaust gas turbocharger 4 and the extracted energy is supplied to the first Is used in the high pressure compressor of the exhaust gas turbocharger (4). In view of the exhaust gas flow direction downstream of the first exhaust gas turbocharger 4, a second exhaust gas turbocharger 5 is disposed through which the high pressure turbine 6 of the first exhaust gas turbocharger 4 The exhaust gas which has already passed through the low-pressure turbine 7 of the second exhaust gas turbocharger 5 is guided. In the low pressure turbine 7 of the second exhaust gas turbocharger 5, the exhaust gas is further expanded, and the energy extracted in the course of the process is also used to compress the supercharged air supplied to the cylinder of the internal combustion engine 1 as well, Is used in the low pressure compressor of the second exhaust gas turbocharger (5).

In addition to the exhaust gas supercharging system 2 comprising two exhaust gas turbochargers 4 and 5, the internal combustion engine 1 includes an exhaust gas aftertreatment system 3, which is an SCR exhaust gas aftertreatment system . The SCR exhaust gas aftertreatment system 3 is preferably connected between the high pressure turbine 6 of the first compressor 5 and the low pressure turbine 7 of the second exhaust gas supercharger 5, The exhaust gas discharged from the high pressure turbine 6 of the gas turbocharger 4 is first introduced into the region of the low pressure turbine 7 of the second exhaust gas turbocharger 5 before the SCR exhaust gas after- Lt; / RTI >

1 shows an exhaust gas supply line 8 through which an exhaust gas originating from a high pressure turbine 6 of a first exhaust gas turbocharger 4 is introduced into an SCR catalytic converter 9 ) Direction.

1 shows the exhaust emission line 11 and the exhaust emission line 11 is exhausted from the SCR catalytic converter 9 in the direction of the low pressure turbine 7 of the second exhaust turbocharger 5, It is used to exhaust gas. The exhaust gas originating from the low-pressure turbine 7 flows out through the line 21 in particular.

The exhaust gas feed line 8 leading to the reactor chamber 10 and thus to the SCR catalytic converter 9 disposed in the reactor chamber and the reactor chamber 10 leading away from the reactor chamber 10, The exhaust emission line 11 is coupled via a bypass 12 with integrated shut-off device 13. The bypass circuit 12 can be cut off through the shutoff device 13 so that the exhaust gas can not flow through the bypass circuit 12. [ In contrast, in particular when the isolating device 13 is opened, the exhaust gas passes through the bypass 12, that is to say through the reactor chamber 10 and thus the SCR catalytic converter 9, which is located in the reactor chamber 10 Can flow. Figure 2 shows the arrow 14, which is the flow of exhaust gas through the exhaust aftertreatment system 3 with the bypass circuit 12 closed by the isolating device 13, from which it can be seen that the exhaust gas supply line 8 is downstream It is evident that the exhaust gas is opened into the reactor chamber 10 with the end portion 15 and the exhaust gas in the region of this end 15 of the exhaust gas supply line 8 has a flow deflection And the exhaust gas is guided through the SCR catalytic converter 9 after the flow deflection.

An inlet device 16 is arranged in the exhaust gas feed line 8 of the exhaust gas aftertreatment system 3 so that a reducing agent is introduced into the exhaust gas downstream of the SCR catalytic converter 9, Ammonia or ammonia precursors required to convert can be introduced into the exhaust gas flow. This inlet device 16 of the exhaust gas aftertreatment system 3 is preferably an injection nozzle through which the ammonia or ammonia precursor is injected into the exhaust gas flow of the exhaust gas supply line 8. Figure 2 shows the cone 17 injection of the reducing agent into the exhaust gas flow in the region of the exhaust gas supply line 8.

The section of the exhaust gas aftertreatment system 3, which is viewed in the flow direction of the exhaust gas, is located downstream of the inlet device 16 and upstream of the SCR catalytic converter 9, and is described as a mixing section 18. In particular, the exhaust gas supply line 8 provides a mixing section downstream of the inlet device 16, and the exhaust gas can be mixed with the reducing agent upstream of the SCR catalytic converter 9 in the mixing section.

The exhaust gas supply line 8 is opened into the reactor chamber 10 through the downstream end 15. This downstream end 15 of the exhaust gas supply line 8 is provided with a baffle element 20 movable relative to the downstream end 15 of the exhaust gas supply line 8. In the illustrated exemplary embodiment, the baffle element 20 is relatively linearly movable with respect to the end 15 of the exhaust gas supply line 8 and opens into the reactor chamber 10. The baffle element 20 is connected to the downstream end 15 of the exhaust gas feed line to block the exhaust gas feed line 8 at the downstream end 15 or to open the exhaust gas feed line 8 at the downstream end 15 Relative to each other. Particularly when the baffle element 20 cuts off the exhaust gas supply line 8 at the downstream end 15, the reactor chamber 10 housing the SCR catalytic converter 9 or the SCR catalytic converter 9 is completely exhausted In order to guide the gas, the isolator 13 of the bypass 13 is preferably opened. In particular, when the baffle element 20 opens the downstream end 15 of the exhaust gas supply line 8, the shutoff device 13 of the bypass 12 may be completely shut off or at least partially open.

Particularly when the baffle element 20 opens the downstream end 15 of the exhaust gas supply line 8 the relative position of the baffle element 20 to the downstream end 15 of the exhaust gas supply line 8 is Especially the exhaust gas mass flow through the exhaust gas supply line 8 and / or the exhaust gas temperature of the exhaust gas in the exhaust gas supply line 8 and / or the amount of reducing agent introduced into the exhaust gas flow through the inlet device 16 Lt; / RTI >

The additional function of the baffle element 20 through the open downstream end 15 of the exhaust gas supply line 8 is to allow any drops of liquid reducing agent that may be present in the exhaust gas flow to flow through the SCR catalytic converter 9 To reach the baffle element 20 where the droplets are trapped and atomized. Depending on the position of the baffle element 20 relative to the downstream end 15 of the exhaust gas supply line 8 with the open downstream end 15 and in particular the exhaust gas supply line 8 in the region of the baffle element 20, It can be determined whether the exhaust gas deflected in the region of the downstream end 15 of the SCR catalytic converter 9 is guided or directed in the more intensively radially inwardly positioned section direction or more intensively radially outwardly positioned in the section of the SCR catalytic converter 9 have.

On the side 20a opposite the exhaust gas supply line 8 the baffle element 20 forms a flow guide for the exhaust gas and is preferably bent in a curved bell-like manner . The side 20a of the baffle element 20 facing the downstream end 15 of the exhaust gas supply line 8 is thus located on the radially inner side of the baffle element 20, Has a shorter distance to the downstream end (15) of the line (8). The baffle element 20 thus enters or curves at the center of the side surface 20a in the direction of the downstream end 15 of the exhaust gas supply line 8 with respect to the flow direction of the exhaust gas.

As described above, the exhaust gas supply line 8 with the downstream end 15 is opened into the reactor chamber 10 which houses the SCR catalytic converter 9. When the exhaust gas supply line 8 is opened, the exhaust gas supply line 8 according to FIG. 2 passes through the bottom 22 of the reactor chamber 10 and flows through the downstream end 15 of the exhaust gas supply line 8 The exhaust gas discharged from the downstream end 15 of the exhaust gas supply line 8 is exhausted from the exhaust gas downstream of the SCR catalytic converter 9, Is deflected to 180 DEG before flowing through.

The exhaust aftertreatment system 3 preferably includes a plurality of blowers 24 disposed in a reactor chamber 10 that houses the SCR catalytic converter 9 therein and is embodied as, for example, air nozzles. do. Here, each blower 24 is connected to the SCR catalytic converter 9 for soot and ash particles that are settled on the SCR catalytic converter 9, in order to avoid clogging of the SCR catalytic converter 9 It is used for blowing and cleaning. The blower device (24) is disposed on the common accumulator (25). As shown here and in FIG. 3, the blower 24 may be disposed about the reactor chamber 10, but may also be disposed below or above the reactor, although not shown here. In this case, the diameter of the accumulator ring 25 can be reduced to such an extent that the overall diameter of the reactor 10 and the accumulator ring 25 is reduced. Here, the accumulator rings 25 can be implemented so that the diameter is not larger than the diameter of the reactor 10, including the necessary thermal insulation of the reactor. For this reason, no additional installation space is required for the diameter for the accumulator rings. The feed 26 to the blower 24 is then substantially influenced from the top or bottom through the bottom 22 or top 23 of the reactor housing to avoid adding to the diameter. The accumulator rings 25 are advantageously arranged parallel to the plane formed by the catalytic converter 9. [

Figure 3 shows a cross-sectional view of the reactor chamber 10 in such a manner that a vortex flow or swirl flow is produced in the reactor chamber 10, i. E. In the through-flow direction or transversely in the exhaust gas flow direction The preferred orientation of the preferably oriented ventilator 24 on the surface of the SCR catalytic converter 9 is shown. Through such a vortex or swirling flow, the SCR catalytic converter 9 can be particularly effective in blowing the soot and the refined molecules. Figure 3 shows a reactor chamber 10 that houses a SCR catalytic converter 9 therein and the reactor chamber 10 preferably has a wall with a circular cross section and a wall extending from the bottom of the reactor chamber 10 (22) and the upper portion (23). By virtue of the wall 19 associated with the orientation of the blower 24, a vortex or vortex flow can be particularly advantageously formed.

3 may be provided with a medium for blowing and cleaning the SCR catalytic converter 9 originating from the accumulator 25 common to all the blowers 24, In the exemplary embodiment, the accumulator 25, which is common to all the blowers 24, extends annularly around the SCR catalytic converter 9 and the blower 24. 3, the accumulator 25 is located outside the reactor chamber 10 and thus also the common accumulator 25 of FIG. 3 is either circular or cylindrical with respect to the reactor chamber 10. In the embodiment shown in FIG. 3, And extends in an annular shape. However, as already described in FIG. 1, the compressor 25 may also be located above or below the reactor chamber 10, which provides the possibility of reducing the diameter of the accumulator ring 25.

Each of the blowers 24 originating from the common accumulator 25 may be provided with a medium for blowing and cleaning the SCR catalytic converter 9 via the supply line 26, Each supply line 26 extends from the common accumulator 25 into the reactor chamber 10 along the direction of each blower 24 so that the walls 19 of the reactor chamber 10 Through.

Although not shown in FIG. 3, the accumulator 25 is arranged so that the supply line 26 extending from the accumulator 25 to the blower 24 does not pass through the wall 19 of the reactor chamber 10. [ It is also possible to place it in the chamber 10.

3, a switching valve 27 is disposed in each supply line 26. As shown in Fig. Each switching valve 27 can be provided with a medium for blowing air to the SCR catalytic converter 9 separately for each blowing device 24 for cleaning. Here, it is possible to simultaneously supply the medium for blowing and purifying the SCR catalytic converter 9 to the air blowing device 24 by proper operation of the valve 27. In contrast, each of the actuatable valves 27 is sequentially energized in a time-phased manner so as to supply the medium to be cleaned by blowing the SCR catalytic converter 9 to only one blower 24 at all times at a time It is also possible to open it in turn.

In the exemplary embodiment shown in Fig. 3, the common accumulator 25 is formed as a circular accumulator in the form of a closed, circular or annular tube, and closed as seen in the circulating or circumferential direction Which means that the accumulator 25 is completely circulated and therefore is not blocked in the circulation or circumferential direction. When viewed in the circulating or circumferential direction, the accumulator 25 is completely filled with the medium for blowing and cleaning the SCR catalytic converter 9, and the medium can freely flow in the accumulator 25 in the circulating or circumferential direction have.

3 further shows the connection line 28 to the accumulator 25 which is common to all the blowers 24 and from which the SCR catalytic converter 9 is derived from the source of the medium for blowing and purifying So that the medium can be provided to the accumulator 25.

Figure 4 shows that the SCR catalytic converter 9 is located in the catalytic converter chamber 10 and the wall 19 of the catalytic converter chamber 10 in cross section does not have a circular contour and is rather a polygonal, A version of the exhaust aftertreatment system in the case of a quadrilateral as shown in the embodiment. In this case, there are again a plurality of blowing devices 24 for blowing and cleaning the SCR catalytic converter 9 and the blowing device 24 is provided with a medium for blowing and purifying the SCR catalytic converter 9, A common accumulator 25 may be provided through the supply line 26 leading to the device 24 and branching to the switching valve 27 disposed in the supply line 26. In the exemplary embodiment of FIG. 4, the common axial accumulator 25, which is very similar to the wall 29 of the reactor chamber 10, is composed of a polygonal, i.e. a polygonal tube of a plurality of tube segments, The polygonal tubes of the segment extend around the SCR catalytic converter 9 and the blower 24, especially also around the reactor chamber 10. Here, in the exemplary embodiment of FIG. 4, the blower 24 is not located in the reactor chamber 10, but the blower 24 blows the medium for blowing and cleaning the SCR catalytic converter 9 into the SCR catalytic converter 9, the spray openings of the blower device 24 are only open into the area of the wall 19 of the reactor chamber 10.

The length of the supply line 26 is at most 1.5 m, preferably at most 1 m, particularly preferably at most 0.5 m.

The air blowing device 24 blows ash and soot into the front face of the SCR catalytic converter 9 when viewed in the exhaust gas flow direction so that air is blown through the SCR catalytic converter 9 The blowing direction of the device 24 extends substantially perpendicular to the flow direction of the exhaust gas.

The accumulator 25 shown in Figure 4 is preferably also designed in such a way that it provides a closed flow duct in the circulating direction around the reactor chamber 10 for the medium for blowing and cleaning the SCR catalytic converter 9. [ So that the medium is not blocked at any position, and therefore, the medium can be diffused into the accumulator 25 without free flow or interruption.

The configuration of the exhaust aftertreatment system having an accumulator volume defined by the accumulator 25 common to the blower 24 is preferred and preferably the following relationship is applied to the accumulator volume:

v = k * (273 + t) / (273 *? p)

v is the size of the accumulator volume in liters, k is the size between 200 and 6000, t is the unit size of the blowing medium temperature in degrees Celsius and? p is the pressure between the pressure in the accumulator 25 and the pressure in the reactor chamber 10 Is the bar unit size of the pressure difference.

Particularly preferably, the blower 24 is preferably provided with the SCR catalytic converter 9, in particular, in order to effectively remove soot and ash from the SCR catalytic converter 9 when the accumulator 25 has such an accumulator volume, A medium for blowing and cleaning can be provided.

In the case of the internal combustion engine 1 of Fig. 1, the exhaust gas aftertreatment system 3 is located upright on the exhaust gas supercharging system 2. Access to the cylinder of the internal combustion engine 1 is free, but the accessibility of the exhaust gas turbocharger 4, 5 is limited. However, when the maintenance work on the exhaust gas turbochargers 4, 6 is required, the reactor chamber 10 can be easily separated.

The exhaust gas after-treatment (not shown) that is inclined by 90 degrees to the side of the exhaust gas supercharging system 2, as opposed to the vertical arrangement of the exhaust gas after-treatment system 3 on the exhaust gas super- 3) Horizontal layout is also possible, but the length of the layout increases due to such horizontal layout. However, the internal combustion engine 1 and the exhaust gas supercharging system 2 are capable of a maintenance work without having to disassemble the reactor chamber 10 without any limitation.

1: Internal combustion engine 2: Exhaust gas supercharging system
3: Exhaust gas aftertreatment system 4: Exhaust gas turbocharger
5: Exhaust gas turbocharger 6: High pressure turbine
7: Low pressure turbine 8: Exhaust gas supply line
9: SCR catalytic converter 10: reactor chamber
11: Exhaust gas discharge line 12: Bypass
13: Shut-off device 14: Exhaust gas routing
15: end 16: inlet device
17: jet cone 18: mixing section
19: wall 20: baffle element
21: line 22: side
23: side surface 24: blower
25: accumulator 26: supply line
27: valve 28: connection line

Claims (10)

An exhaust gas aftertreatment system (3) of an internal combustion engine, that is, an SCR exhaust aftertreatment system of an internal combustion engine,
An SCR catalytic converter (9) housed in a reactor chamber (10);
An exhaust gas feed line (8) leading to the reactor chamber (10) and thus leading to the SCR catalytic converter (9);
An exhaust gas discharge line (11) away from the reactor chamber (10) and thus away from the SCR catalytic converter (9); And
An inlet device (16) arranged in the exhaust gas supply line (8) for introducing a reducing agent, in particular an ammonia or ammonia precursor substance, into the exhaust gas,
Lt; / RTI >
A common axial accumulator for a plurality of blowing devices 24 used for blowing and cleaning the SCR catalytic converter 9 and one blower 24, And a medium derived from the common accumulator (25) can be supplied to the air blowing device (24) for blowing the air to the SCR catalytic converter (9). Processing system. The exhaust gas purifier as claimed in claim 1, characterized in that the common accumulator (25) extends outside the reactor chamber (10) around the reactor chamber (10) or is located above or below the reactor chamber Processing system. 3. A system according to claim 1 or 2, characterized in that the supply line (26) originating from the common accumulator (25) leads to a respective blower (24) ) Can be supplied with a medium for blowing and cleaning the SCR catalytic converter (9), and a switching valve (27) is arranged in each supply line (26). 4. A method according to claim 2 and 3, characterized in that each of the supply lines (26) originating from an accumulator (25) located outside the reactor chamber (10) Extends through the walls of the reactor chamber (10) to the device (24), and a switching valve (27) is disposed in each of the supply lines (26). 5. A device according to any one of claims 1 to 4, characterized in that the common accumulator (25) is closed and extends in the circulating direction around the reactor (10) and / or the blower (24) Exhaust gas aftertreatment system. The exhaust aftertreatment system according to any one of claims 1 to 4, characterized in that the common accumulator (25) is attached to the bottom (22) or top (23) of the reactor (10) . 7. The apparatus according to claim 6, wherein the supply (26) to the blower (24) is influenced by being derived from the common accumulator (25) through the bottom (22) And the exhaust gas after-treatment system. 8. A device according to any one of the preceding claims, characterized in that the common accumulator (25) is designed as a circular or polygonal tube which is closed and extends around the reactor (10) Wherein the exhaust gas aftertreatment system comprises: 9. A device according to any one of claims 1 to 8, characterized in that the common accumulator (25) has an accumulator volume and the following relation is applied to the accumulator volume:
v = k * (273 + t) / (273 *? p)
Where v is the size of the accumulator volume in liters, k is a size between 200 and 6000, t is the unit size of the temperature of the blowing medium in degrees Celsius, (Bar) unit of pressure difference between the pressures in the chamber (10). An internal combustion engine having an exhaust gas after-treatment system (3) according to any one of claims 1 to 9, characterized in that it comprises a first exhaust turbocharger (4) comprising a high-pressure turbine (6) Stage exhaust gas supercharging system (2) having a second exhaust turbocharger (5) comprising a low pressure turbine (7), said exhaust gas aftertreatment system (3) comprising a high pressure turbine 6) and the low-pressure turbine (7).

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