EXHAUST FUEL TREATMENT DEVICE AND ENGINE

Description

[0001] The invention relates to an exhaust gas aftertreatment device and an internal combustion engine.

[0002] Exhaust aftertreatment devices and internal combustion engines are known from the prior art (EP 1 348 840 A1; EP 3 497 310 B1; US ​​11,066,971 B1; US ​​2017 / 0037764 A1; US ​​2004 / 0104577 A1; KR 10-2011-0111644). To reduce pollutants in the exhaust gas of an internal combustion engine, such exhaust aftertreatment devices are typically arranged in the exhaust system of the internal combustion engine. This makes it possible for the internal combustion engines and the vehicles powered by them to comply, in particular, with legally prescribed pollutant limits. Such limit specifications are particularly common in passenger car and truck traffic and usually have local and / or regional validity.

[0003] In addition, there are also internal combustion engines that are used in areas where exhaust gas aftertreatment is not required and / or legally prescribed. For cost reasons and / or to simplify the design of such internal combustion engines, exhaust gas aftertreatment is often omitted. Nevertheless, it can be advantageous to install exhaust gas aftertreatment in such internal combustion engines, at least temporarily – for example, for ecological reasons and / or to prepare for potentially changing legal requirements or, in particular, to meet temporary, local pollutant emission control requirements.

[0004] Especially in large, stationary internal combustion engines, especially those installed as stationary power plants, there may be a temporary need for exhaust gas aftertreatment. This temporary need for exhaust gas aftertreatment can arise from seasonal and / or weather-related circumstances, as well as from changing legal frameworks.

[0005] The disadvantage of the known exhaust aftertreatment devices is that they are permanently connected to the internal combustion engine and therefore cannot be used flexibly. In particular, flexible, temporary exhaust aftertreatment is only possible if the exhaust aftertreatment device is already present and can be switched on or off as needed, for example, via a valve circuit. This results in very high costs, since every internal combustion engine whose pollutant emissions are to be reduced at least temporarily must be equipped with such an exhaust aftertreatment device.

[0006] The object of the present invention is to provide an exhaust gas aftertreatment device that avoids the aforementioned disadvantages. In particular, the object of the invention is to provide a flexibly deployable exhaust gas aftertreatment device and to reduce costs.

[0007] The object is achieved by providing an exhaust gas aftertreatment device having the features of claim 1 and an internal combustion engine having the features of claim 9. Advantageous embodiments emerge from the dependent claims.

[0008] The exhaust gas aftertreatment device comprises a catalytic converter system and, in particular, a walk-in container, wherein the catalytic converter system is arranged in an interior space of the container, wherein the container has at least two preferably closable openings, wherein a first opening of the two openings is connected to the catalytic converter system on the upstream side, and wherein a second opening of the two openings is connected to the catalytic converter system on the downstream side. This creates a flexibly deployable exhaust gas aftertreatment device which, if necessary, can be connected, in particular by means of the first opening, to an exhaust gas opening of an external internal combustion engine. As soon as exhaust gas aftertreatment is no longer required, the exhaust gas aftertreatment device can be separated from the internal combustion engine again, transported separately from it, and used elsewhere, in particular for exhaust gas aftertreatment of another internal combustion engine.This also reduces manufacturing costs, as not every internal combustion engine requires its own exhaust aftertreatment device.

[0009] A catalyst system is understood here in particular to mean a system which is designed and equipped to reduce a pollutant content in a supplied fluid, in particular a gas mixture, especially an exhaust gas.

[0010] The catalytic converter system preferably comprises at least one inflow path, one outflow path, and at least one catalytic converter device arranged between the inflow and outflow paths in the flow direction. The catalytic converter system is designed and configured such that, when the exhaust gas aftertreatment device is in operation, an exhaust gas is supplied to the catalytic converter device on the inflow side, i.e., via the inflow path. The supplied exhaust gas is aftertreated in the catalytic converter device, in particular, a pollutant component of the exhaust gas is reduced. Downstream of the exhaust gas aftertreatment location, in particular downstream of the catalytic converter device, the catalytic converter device is fluidically connected to the second opening on the downstream side, i.e., via the outflow path. As a result, the aftertreated exhaust gas can flow out via the outflow path and the second opening, in particular, be guided out of the container and expelled.

[0011] A container is understood here in particular to be a walk-in container that preferably has four side walls, a floor, and a roof. Overall, the container is therefore preferably cuboid-shaped. Furthermore, the container is preferably weatherproof, so that it can be exposed to the elements without additional protection and without damage to components arranged in the interior. In addition, the container is preferably designed and configured to enable relocation of the container, in particular transport, with the least possible effort. Most particularly, the container is designed as a standardized container, in particular an ISO container. Such standardized containers are known, for example, from freight transport, in particular sea freight, air freight, and truck freight.

[0012] The catalytic converter system preferably comprises a plurality of catalytic converter devices, in particular an oxidation catalyst and an SCR catalyst. This improves exhaust gas aftertreatment, in particular by allowing a pollutant component and / or several different pollutant components in the supplied exhaust gas to be reduced even further. Alternatively, the catalytic converter system comprises only one catalytic converter device, in particular an SCR catalyst, thereby reducing the overall costs and design complexity of the exhaust gas aftertreatment device.

[0013] The at least two openings are preferably designed to be closable, wherein the at least two openings are closed—in particular when the exhaust gas aftertreatment device is in transport. In the operating state of the exhaust gas aftertreatment device, the first opening is preferably open and connected to an external internal combustion engine on an outer side of the container. The second opening is also open in the operating state and is configured as an exhaust gas outlet for the aftertreated exhaust gas. The at least two openings are preferably formed in an outer wall of the container, in particular in one or more of the four side walls, the floor, and / or the roof.

[0014] According to a further development of the invention, the exhaust gas aftertreatment device comprises a work platform arranged on a container roof. This allows for easy installation of components to be mounted on the container roof.

[0015] The work platform preferably has a non-slip floor, thus increasing work safety. Furthermore, the work platform preferably has a foldable railing, which—particularly in the transport state—is folded and attached to the container roof and / or the work platform. This allows the overall height of the exhaust gas aftertreatment device to be reduced, particularly for transport purposes, thus simplifying transport.

[0016] Furthermore, the exhaust gas aftertreatment device preferably has a ladder which can be arranged, in particular arranged, in such a way that the work platform can be climbed with the aid of this ladder.

[0017] According to a further development of the invention, the exhaust gas aftertreatment device comprises an exhaust gas stack, which—at least in an operating state of the exhaust gas aftertreatment device—is mounted outside the container at the second opening. This ensures good extraction of the aftertreated exhaust gas, eliminating the need for an external exhaust gas stack. Furthermore, the exhaust gas stack is preferably not mounted in the transport state, so that the exhaust gas aftertreatment device can be transported as a whole with little effort, while the exhaust gas aftertreatment device has a comparatively low height.

[0018] Preferably, the exhaust gas aftertreatment device also comprises a connecting element designed and configured to connect the first opening to an external internal combustion engine. Particularly in the operating state, the first opening is connected via the connecting element to an exhaust gas discharge opening of the external internal combustion engine. This allows the exhaust gas from the external internal combustion engine to be introduced directly into the exhaust gas aftertreatment device and treated there by the catalytic converter system.

[0019] The container preferably has at least one maintenance opening, in particular a maintenance door. This allows the components arranged in the interior of the container, in particular the catalyst system, to be at least partially accessible and / or replaceable from the outside. Particularly preferably, the container has a large maintenance door on each of its narrow end faces, which is particularly preferably designed as a double door. Thus, even large components, in particular entire components of the catalyst system, can be removed from the container for maintenance. In particular, these components can be replaced via these maintenance doors in the event of a defect.

[0020] According to the invention, the container has at least one rail device, wherein at least a portion of the catalyst system is arranged so as to be movable on the rail device. This simplifies relocation of the catalyst system, particularly for maintenance purposes. In particular, the catalyst system can be at least partially removed from the container and / or replaced by means of the rail device. This simplifies maintenance and repair of the exhaust gas aftertreatment device.

[0021] According to a further development of the invention, the catalytic converter system comprises a fresh air supply device for supplying fresh air. The fresh air supply device comprises a first flow opening that is at least indirectly connected to the catalytic converter system, preferably the catalytic converter device, in particular fluidically connected. The fresh air supply device comprises a second flow opening that is designed and configured for fluidically connecting to a fresh air source, in particular fluidically connected. Fresh air can thus be admixed with the supplied exhaust gas, thereby enabling compliance with technical, chemical, and / or legal temperature limits during exhaust gas aftertreatment.In addition, the addition of fresh air makes it possible to control the reaction temperature of the catalytic reactions for exhaust gas aftertreatment and preferably to keep it within a target range in which the exhaust gas to be aftertreated, in particular individual gas components of the exhaust gas, can be aftertreated particularly efficiently. In addition, the addition of fresh gas makes it possible to set a reaction environment, in particular a reaction temperature, which favors individual exhaust gas aftertreatment reactions in such a way that they occur with increased intensity. In particular, this prevents the catalytic converter system and device from overheating to such an extent that exhaust gas aftertreatment would deteriorate. In particular, this allows different types of internal combustion engines to be connected to the exhaust gas aftertreatment device and their exhaust gases to be aftertreated effectively.

[0022] The amount of fresh air supplied is preferably determined depending on the connected internal combustion engine, ensuring optimal pollutant reduction in the exhaust gas at all times. This also improves the flexible use of the exhaust aftertreatment device.

[0023] A fresh air source is understood here to be, in particular, the container's surroundings, in particular the atmosphere. Alternatively, it is understood to be a fresh air reservoir, which is preferably designed as a fresh air storage device. Such a fresh air reservoir is preferably a component of the exhaust gas aftertreatment device and arranged in its interior. This allows fresh air to be supplied independently of the external atmosphere, so that the exhaust gas aftertreatment device can also be used in environments where no or insufficient fresh air is available.

[0024] According to a further development of the invention, at least one axial fan, in particular a frequency-controlled one, is arranged in a wall of the container for room temperature control. This axial fan is designed and configured to generate an air flow between the interior and the fresh air source, in particular an external environment of the container. This prevents overheating of the interior and the components arranged therein. It also provides a fresh air supply for the interior of the container, allowing people to stay safely in the container and preventing the risk of suffocation.

[0025] According to a further development of the invention, the catalyst system comprises an SCR catalyst, with at least one reducing agent reservoir arranged in the interior of the container, which is connected to the catalyst system via a reducing agent supply line. The exhaust gas aftertreatment device thus comprises all relevant components for aftertreating the supplied exhaust gas using the SCR catalyst and for degrading pollutants contained in the exhaust gas. In particular, the reducing agent does not need to be supplied externally. This allows the exhaust gas aftertreatment device to be used flexibly and is quickly ready for use after a change of location.

[0026] An SCR catalyst is understood here in particular to mean a catalyst which is designed and configured for the selective catalytic reduction of an exhaust gas component, in particular nitrogen oxides of the exhaust gas.

[0027] Preferably, the at least one reducing agent reservoir is accessible and / or replaceable via the maintenance doors, in particular the front-side maintenance doors.

[0028] Preferably, two IBC containers (Intermediate Bulk Containers), in particular of equal size, are used as the at least one reducing agent reservoir, wherein each of the reducing agent reservoirs, in particular each of the IBC containers, preferably has a capacity of between 500 and 4000 liters, preferably 1000 liters. Furthermore, the interior is preferably twice as wide as an IBC container, so that the two IBC containers can be arranged side by side to save space.

[0029] The reducing agent reservoir is preferably arranged on one end of the container in the interior so that it is easily accessible via one of the front-side maintenance openings, in particular for refueling purposes, and is preferably removable from the interior and thus replaceable.

[0030] In this case, a fluid containing urea is preferably used as the reducing agent. A urea solution is particularly preferred as the reducing agent.

[0031] According to a further development of the invention, a compressed air device is arranged in the interior space for injecting a reducing agent, wherein the compressed air device is operatively connected to the reducing agent supply line. Thus, the reducing agent can be injected into the catalytic converter system at a suitable pressure. Since the exhaust gas pressure of the supplied exhaust gas can vary depending on the connected external internal combustion engine, the exhaust gas aftertreatment device is flexible and can be used in combination with a wide variety of different internal combustion engines.

[0032] The compressed air device preferably comprises a compressor and a compressed air reservoir. This ensures a constant pressure and prevents pressure fluctuations during injection.

[0033] Preferably, the reducing agent supply line opens into a compressed air line supplied with compressed air. Thus, the reducing agent is entrained by the compressed air in the compressed air line and supplied to the inflow path and / or directly to the catalyst device.

[0034] Furthermore, a metering device is preferably arranged in the interior, which is designed and configured to meter a reducing agent to be supplied to the catalyst device. Thus, the exhaust gas aftertreatment device can always be adapted to changing external conditions, in particular to different types of external internal combustion engines.

[0035] According to a further development of the invention, a control unit designed and configured to control the catalytic converter system is arranged in the interior. This eliminates the need for an additional control unit, and the control unit required to control the catalytic converter device is always carried with the exhaust gas aftertreatment device. Particularly preferably, the control unit is arranged in a walkable part of the container, in particular in a control room. Thus, the exhaust gas aftertreatment device can be controlled by a person in the container, with the people and the control unit being protected from the weather.

[0036] The control unit is preferably designed and configured to adjust a metered amount of the reducing agent and / or an injection pressure of the compressed air device, particularly as a function of the internal combustion engine and / or the supplied exhaust gas, particularly its chemical composition. The appropriate metered amount is preferably adjusted automatically, in particular by measuring an exhaust gas pressure and / or the chemical composition in the inflow path, and / or manually by a person. This makes the exhaust gas aftertreatment device flexible and usable in combination with a variety of different internal combustion engines, always allowing for optimal exhaust gas aftertreatment tailored to the respective exhaust gas.

[0037] The exhaust gas aftertreatment device, and in particular the control unit, is thus designed and configured to adjust the exhaust gas aftertreatment for a variety of different internal combustion engines. For this purpose, internal combustion engine-specific data sets and / or characteristic maps for exhaust gas aftertreatment can preferably be stored in the control unit. These can be easily selected using the control unit, thus always setting a suitable and optimal exhaust gas aftertreatment for the respective connected internal combustion engine.

[0038] Preferably, the control unit is designed and configured to provide the reducing agent, in particular to meter it and / or adjust the injection pressure, depending on the type of reducing agent. Thus, various types of reducing agents can be filled into the reducing agent reservoir, whereby a suitable, in particular optimal, metered amount and / or injection pressure can always be set by means of the control unit.

[0039] According to a further development of the invention, the exhaust gas aftertreatment device is designed as a vehicle or as a vehicle trailer. This allows the exhaust gas aftertreatment device to be used particularly flexibly and can be relocated from one location to another at the site of use with little effort and quickly.

[0040] The vehicle trailer is preferably designed as a truck trailer. Furthermore, the vehicle trailer and / or the vehicle preferably has an assembly crane. Using this assembly crane, the exhaust stack and / or the connecting element, in particular, can be easily mounted on the first and / or second opening.

[0041] The object is also achieved, in particular, by providing an internal combustion engine with an exhaust gas aftertreatment device according to one of the aforementioned embodiments, wherein an exhaust gas outlet of the internal combustion engine is fluidly connected to the first opening of the exhaust gas aftertreatment device. This results in the advantages already mentioned above in connection with the exemplary embodiments of the exhaust gas aftertreatment device.

[0042] The internal combustion engine referred to here, in particular an external one, is preferably designed as a reciprocating piston engine. One embodiment of the internal combustion engine is preferably also used stationary, for example for stationary energy supply in emergency power operation, continuous load operation, or peak load operation, wherein the internal combustion engine in this case preferably drives a generator. Stationary application of the internal combustion engine to drive auxiliary units, for example fire pumps on drilling platforms, is also possible. Furthermore, application of the internal combustion engine in the field of extracting fossil raw materials and in particular fuels, for example oil and / or gas, is possible. Use of the internal combustion engine in the industrial sector or in the construction sector, for example in a construction or building machine, for example in a crane or an excavator, is also possible.The internal combustion engine is preferably designed as a diesel engine, a gasoline engine, a gas engine for operation with natural gas, biogas, special gas, or another suitable gas, or a synthetic fuel. Particularly if the internal combustion engine is designed as a gas engine, it is suitable for use in a combined heat and power plant for stationary energy generation.

[0043] The invention is explained in more detail below with reference to the drawings. In the drawings: Figure 1 a perspective view of an exhaust aftertreatment device, Figure 2 in Figure 1illustrated exhaust gas aftertreatment device in a rotated view with a mounted exhaust gas chimney, Figure 3 a perspective sectional view of the exhaust gas aftertreatment device, in particular the interior of the container, Figure 4 a first part of the exhaust gas aftertreatment device in a sectional view in a plan view, Figure 5 a perspective sectional view of a second part of the exhaust gas aftertreatment device, and Figure 6 the exhaust gas aftertreatment device in an operating state connected to an internal combustion engine.

[0044] Fig. 1 shows an exhaust gas aftertreatment device 1 with a container 3, in the interior of which a Figure 1A catalyst system (not shown) is arranged therein. The container 3 has at least two openings, here a first opening 5 and a second opening 7. The catalyst system arranged inside the container 3 can be connected to an external internal combustion engine, in particular to an exhaust gas opening of the external internal combustion engine, via the first opening 5. This creates a flexibly usable exhaust gas aftertreatment device 1. This can be connected to a variety of different external internal combustion engines and aftertreat their exhaust gases, in particular reduce the pollutants contained therein.

[0045] Both openings, i.e. the first opening 5 and the second opening 7, are preferably designed to be closable and are closed in the state shown here.

[0046] In addition, the exhaust gas aftertreatment device 1 is easy to transport using the container 3. The container 3 is preferably designed as a standardized container, in particular an ISO container. In any case, the container 3 preferably has dimensions typical for freight transport, so that it can be handled using known freight infrastructure, in particular freight cranes and freight transporters.

[0047] Furthermore, Figure 1 It can be seen that a work platform 11 is arranged on a container roof 9 of the container 3. This work platform 11 preferably comprises a non-slip floor 13 and a foldable railing 15, which is shown here in an unfolded state. In a folded state (not shown here), the railing 15 preferably rests against the container roof 9, wherein the railing 15 can preferably be securely fixed to the container roof 9 in this folded state for transport.

[0048] By folding the railing 15, the overall height of the exhaust aftertreatment device 1 is reduced, so that the entire exhaust aftertreatment device 1, especially after loading onto a truck trailer, does not exceed the maximum heights typical for road traffic. Thus, the exhaust aftertreatment device 1 can be transported using conventional truck trailers in normal road traffic. In particular, this avoids the need for special or heavy-duty transport measures and / or special permits during transport.

[0049] The Figure 1The illustrated state of the exhaust gas aftertreatment device 1 corresponds - with the exception of the erected railing 15 - to a transport state of the exhaust gas aftertreatment device 1. In particular, in the transport state of the exhaust gas aftertreatment device 1, the first opening 5 and the second opening 7 are closed. In addition, in the transport state, the railing 15 is folded up, in particular placed against the work platform 11 and / or the container roof 9 and securely fixed thereto for transport.

[0050] In addition, Figure 1several maintenance openings 17, here in particular four maintenance openings. Two of these maintenance openings, namely a front double door 19 and a side double door 21, are designed such that the container can be accessed by maintenance personnel through these double doors. Furthermore, large components inside the container 3 can also be removed and / or replaced, particularly for maintenance purposes, through these large maintenance openings 17, in particular the double doors 19.

[0051] Fig. 2 shows the Figure 1 exhaust aftertreatment device 1 shown in a Figure 1 rotated approximately 90° clockwise, so that here a Figure 1 shown first long side 23 opposite second long side 25 can be seen. Unlike in Figure 1Here, the second opening 7 is no longer closed. Rather, an exhaust stack 27 is mounted at the second opening 7, through which the post-treated exhaust gases—that is, after passing through the catalytic converter system—are expelled.

[0052] The exhaust stack 27 is further attached to a support frame 29. This increases the stability of the exhaust stack 27. Furthermore, the assembly of the exhaust stack 27 is also simplified, in particular by attaching the exhaust stack 27 and / or the support frame 29 to the container 3, in particular to the container roof 9, by means of at least one fastening structure, particularly a twistlock fastening.

[0053] Furthermore, the handling of the exhaust stack 27 is improved by the fact that the exhaust stack 27 is firmly connected to the support frame 29. Thus, the exhaust stack 27 can be gripped and adjusted during assembly using the support frame 29. Furthermore, because the support frame 29 surrounds the exhaust stack 27 in the circumferential direction, damage to the exhaust stack 27 is avoided, particularly during assembly and transport.

[0054] Further in Figure 2 Further maintenance openings 17, in particular a maintenance door 31, can be seen, through which the container 3 can be accessed by maintenance personnel and / or for controlling the exhaust gas aftertreatment device 1. Some of the maintenance openings 17 are designed as air-permeable ventilation openings 33 for ventilation of the interior, even when closed. Figure 2 To the right of the maintenance door 31, further small ventilation openings 33 can be seen.

[0055] Fig. 3shows the exhaust gas aftertreatment device 1 in a perspective sectional view, wherein the second long side 25, which is visible to the viewer in Figure 2 facing away from the container 3. As a result, it can be seen here that a rail device 37 is arranged in an interior space 35 of the container 3, on which rail device a part of the catalyst system 39, namely the catalyst device 41 here, is displaceably arranged. As a result, at least a part of the catalyst system 39, in particular the catalyst device 41, preferably the entire catalyst system 39, can be displaced out of the container 3 via the front double door 19 by means of the rail device 37 with little effort, so that maintenance of the catalyst system 39 is simplified.

[0056] The Figure 3The catalyst system shown preferably comprises an SCR catalyst. Particularly preferably, the catalyst system also comprises an oxidation catalyst and / or other catalyst types. This enables particularly comprehensive exhaust gas aftertreatment, with the pollutants in the exhaust gas being largely degradable.

[0057] Deviating from the Figure 2 The state of the exhaust gas aftertreatment device 1 shown here is Figure 3 the exhaust chimney 27 is not mounted on the second opening 7. Instead, the second opening 7 and the first opening 5 are - as in the Figure 1 shown condition - closed.

[0058] Further shows Figure 3that the catalyst device 41, which is arranged fluidically between the first opening 5 and the second opening 7, is fluidically connected on the inflow side via an inflow path 43 to the first opening 5 and on the outflow side via an outflow path to the second opening 7. The exhaust gas aftertreatment device 1 is designed and configured to feed an exhaust gas supplied via the first opening 5, in particular from an external internal combustion engine, to the catalyst system 39, in particular to the catalyst device 41, and - after a catalytic reaction for pollutant reduction in the catalyst device 41 - to pass the aftertreated exhaust gas via the second flow path 45 to the second opening 7 and to expel it there, in particular via an exhaust gas chimney 27 connected to the second opening 7.

[0059] The catalytic converter system 39 preferably has a fresh air supply device 47, which is at least indirectly fluidically connected to the catalytic converter device 41 via a first flow opening 48 of the fresh air supply device 47. The supplied air is blown into the inflow path 43 via a connecting channel 49. The fresh air supply device 47, designed here in particular as a fresh air blower, is configured and designed to receive fresh air from a fresh air source via a second flow opening 51. The fresh air source 53 is therefore preferably provided by an environment of the container 3, in particular the atmosphere.

[0060] The amount of fresh air supplied is preferably determined manually or automatically depending on the internal combustion engine connected to the exhaust gas aftertreatment device 1. Thus, the exhaust gas aftertreatment device 1 can be used in combination with a variety of different internal combustion engines, whereby by adjusting a suitable amount of fresh air to be supplied, the various exhaust gases of the various internal combustion engines can be effectively aftertreated and the pollutants contained therein can be reduced.

[0061] The fresh air supply device 47 is arranged here, in particular, adjacent to a maintenance opening 17 designed as a ventilation opening 33 and is preferably fluidically connected thereto. Thus, fresh air from outside the container 3 can be directly drawn in by the fresh air supply device 47.

[0062] The interior 35 of the container 3 shown here is divided into two sub-chambers, namely a catalyst chamber 55 and a control chamber 57. The two chambers are essentially separated from each other by a partition wall, with a door 59 arranged in the partition wall, allowing a person to move between the catalyst chamber 55 and the control chamber 57 without having to leave the container 3. This increases occupational safety and reduces the noise exposure of persons in the control chamber 57.

[0063] In the interior space 35, here the control chamber 57, at least one reducing agent reservoir 61 is also arranged, here in particular two IBC containers that can be filled with a reducing agent, in particular filled with it. A urea solution is preferably used as the reducing agent. This reducing agent reservoir 61 is connected to the catalyst system 39 via a reducing agent supply line. For the pressurized injection of the reducing agent, a compressed air device 62 is also arranged in the interior space 35 and is operatively connected to the reducing agent supply line.

[0064] As in Fig. 4As can also be seen in a plan view of a part of the interior space 35, in particular the control space 57 and a section of the catalyst space 55, a compressed air tank 65 is arranged in the catalyst space 55, wherein the compressed air tank 65 is operatively connected to the compressor 63 arranged in the control space in such a way that the compressed air tank 65 can be pressurized with a pressure generated by the compressor 63.

[0065] The compressed air device 62 is operatively connected as a whole to the reducing agent supply lines in such a way that a reducing agent flowing through the reducing agent supply lines can be pressurized with compressed air and can thus be injected into the catalyst device 41 and / or the inflow path 43.

[0066] For metering the reducing agent, a metering device 67 is further arranged in the control chamber 57, which device has at least one metering unit 69 and a metering pump 71. The metering pump 71 is designed and configured to pump reducing agent from the reducing agent reservoir 61 and to supply it to the metering unit 69 via a connecting line 73.

[0067] In cooperation with a control unit 75 arranged in the control chamber 57, a metered quantity can be set, preferably depending on a connectable and intended for connection internal combustion engine type, which is metered accordingly by the metering unit 69 and supplied to the inflow path 43 and / or the catalyst device 41, in particular with compressed air, with the aid of the compressed air device 62.

[0068] The two reducing agent reservoirs 61, which are designed here as IBC containers, are preferably dimensioned such that two of these reducing agent reservoirs 61 can be precisely arranged along one transverse side of the container 3 in the interior 35, here in particular the control chamber 57. This effectively utilizes the space in the container 3 and provides a large amount of reducing agent.

[0069] The reducing agent reservoir 61 can be removed as a whole from the container 3 and / or refueled from outside the container 3 via a further maintenance opening, which is designed here as a further front-end double door 77.

[0070] Preferably, the reducing agent is pumped by means of the metering pump 71 from a first IBC container of the two IBC containers, wherein a second IBC container of the two IBC containers is fluidly connectable to the first IBC container, in particular is connected to it and functions as a reserve container. The second IBC container is preferably fluidly connected to the first IBC container via an attached refill pump and preferably a filling nozzle and is configured to refill the first IBC container as needed. This creates a largely continuous supply of reducing agent. In particular, this allows reducing agent to be refilled even during operation of the exhaust gas aftertreatment device 1.

[0071] The control unit 75 is also designed and configured to control the catalytic converter system 39 as a whole. This creates at least partially automated control of the catalytic converter system 39. In particular, the exhaust gas aftertreatment device 1 can be operated in combination with various types of internal combustion engines, wherein the exhaust gases of the various types of internal combustion engines can each be effectively aftertreated by means of the exhaust gas aftertreatment device 1.

[0072] Fig. 5 shows a wall 83 of the container 3, in which at least one axial fan 85 is arranged for regulating the room temperature of the interior 35, in particular two axial fans 85. The axial fans 85 are preferably designed and configured to be frequency-controlled. Thus, an appropriate temperature control of the interior 35, in particular of the catalyst chamber 55, and / or a supply of fresh air is always provided.

[0073] In Figure 5For better visibility of the axial fans 5 and 80, the catalyst system 39 is not shown. This essentially corresponds to the view of the catalyst chamber 55 after at least a portion of the catalyst system 39 has been removed from the interior 35, for example, for maintenance purposes, in particular by means of the rail devices 37.

[0074] This removal of the catalyst system 39 or a part of the catalyst systems 39, in particular the catalyst device 41, can be carried out during such maintenance work, in particular via the large maintenance opening 17, i.e. the Figure 5 front double door 19 shown on the left.

[0075] Due to the catalyst system 39 (not shown), in particular the outflow path 45 (not shown), Figure 5Furthermore, an internal nozzle 87 of the second opening 7 can be seen. This is arranged inside the second opening 7 and simplifies the assembly of the outflow path 45 at the second opening 7.

[0076] The compressed air device 62, in particular the compressor 63, the fresh air supply device 47, and / or the axial fan 85 are preferably arranged in the interior space 35 adjacent to one or more of the ventilation openings 33. This allows the air requirements, in particular the fresh air requirements, of these devices to be met reliably, while requiring minimal design effort.

[0077] Fig. 6shows the exhaust gas aftertreatment device 1 in the operating state, wherein an exhaust outlet 89 of an internal combustion engine 91 is connected to the first opening 5 of the exhaust gas aftertreatment device 1 via a connecting element 93. Furthermore, in the operating state shown here, the exhaust gas stack 27 is mounted on the second opening 7. As a result, the exhaust gas of the internal combustion engine 91, which is preferably a stationary internal combustion engine 91, can be aftertreated, particularly temporarily and cost-effectively.

[0078] The exemplary embodiment of the exhaust gas aftertreatment device 1 illustrated here is arranged, in particular, on a trailer 95. The exhaust gas aftertreatment device 1 is preferably designed as a trailer 95, particularly a truck trailer. Thus, the exhaust gas aftertreatment device 1 is highly mobile and can be used flexibly.

[0079] To simplify assembly, in particular of the exhaust stack 27 and the connecting element 93, the trailer 95 has an assembly crane 97. Thus, the exhaust aftertreatment device can be quickly and easily put into operation after relocation to a new location, in particular, it can be connected to the internal combustion engine 91.

Claims

1. Exhaust gas aftertreatment device (1) with a catalytic converter assembly (39) and a container (3), wherein the catalytic converter assembly (39) is arranged in an interior (35) of the container (3), wherein the container (3) has at least two openings (5, 7), wherein a first opening (5) of the two openings (5, 7) is connected on an upstream side to the catalytic converter assembly (39), and wherein a second opening (7) of the two openings (5, 7) is connected on a downstream side to the catalytic converter assembly (39), characterised in that the container (3) has at least one rail device (37), wherein at least a part of the catalytic converter assembly (39) is arranged displaceably on the rail device (37).

2. Exhaust gas aftertreatment device (1) according to one of the preceding claims, characterised in that the exhaust gas aftertreatment device (1) has a working platform (11) which is arranged on a container roof (9) of the container3. Exhaust gas aftertreatment device (1) according to one of the preceding claims, characterised in that the exhaust gas aftertreatment device (1) has an exhaust gas chimney (27) which - at least in an operating state of the exhaust gas aftertreatment device (1) - is mounted outside the container (3) at the second opening (7).

4. Exhaust gas aftertreatment device (1) according to one of the preceding claims, characterised in that the catalytic converter assembly (39) has a fresh air supply device (47) for supplying fresh air, wherein the fresh air supply device (47) has a first flow opening (48) which is at least indirectly connected to the catalytic converter assembly (39), and wherein the fresh air supply device (47) has a second flow opening (51) which is designed and set up to be connected fluidically to a fresh air source (53).

5. Exhaust gas aftertreatment device (1) according to one of the preceding claims, characterised in that the catalytic converter assembly (39) has an SCR catalytic converter, wherein at least one reducing agent reservoir (61) is arranged in an interior (35) of the container (3) and is connected to the catalytic converter assembly (39) via a reducing agent supply conduit.

6. Exhaust gas aftertreatment device (1) according to one of the preceding claims, characterised in that a compressed air device (62) for injecting a reducing agent is arranged in the interior (35) and is operatively connected to the reducing agent supply conduit.

7. Exhaust gas aftertreatment device (1) according to one of the preceding claims, characterised in that a control unit (75), which is designed and set up to control the catalytic converter assembly (39), is arranged in the interior (35).

8. Exhaust gas aftertreatment device (1) according to one of the preceding claims, characterised in that the exhaust gas aftertreatment device (1) is designed as a vehicle or as a vehicle trailer (95).

9. Internal combustion engine (91) with an exhaust gas aftertreatment device (1) according to one of the preceding claims, wherein an exhaust gas outlet (89) of the internal combustion engine (91) is fluidically connected to the first opening (5) of the exhaust gas aftertreatment device (1).