JP6505764B2 - Internal combustion engine system - Google Patents

Description

  The present invention relates to an internal combustion engine system comprising an internal combustion engine generating exhaust gas, an exhaust gas receiver configured to receive the exhaust gas, and a gas processing device.

  Combustion engines generate varying amounts of pollution, which can be reduced in many ways. One way is to recycle a predetermined amount of exhaust gas, thereby reducing the formation of NOx during the combustion process.

Before recirculating the exhaust gas, the temperature must be lowered and treated for particles and sulfur, which prevents damage to the engine. One method of treating the exhaust gas is by press scrubber treatment where NaOH / water is injected into the exhaust gas recirculation (EGR) gas. During evaporation, SO ₃ aerosols, soot and salt particles are formed which are then removed in the next scrubber before the gas is sent to the engine as scavenging gas. In order to improve this process, there is a need for another solution that can supplement or even replace known scrubbers / filters, this being due to the high particle content formed during the press scrubber treatment Because of this, the already known filter technology gets stuck very quickly.

The object of the present invention is to overcome completely or partially the disadvantages and drawbacks of the prior art described above. More specifically, the object of the present invention is to provide an improved gas handling device which removes and prevents the formation of SO ₃ aerosols, salts and soot particles more effectively than known scrubbers.

The above objectives and many other objectives, advantages and features which will be apparent from the following description are:
An internal combustion engine generating exhaust gas,
An exhaust gas receptor configured to receive the exhaust gas;
A gas treatment device comprising a housing, the housing having a top surface, an exhaust gas inlet and an outlet, the gas treatment device being arranged downstream of the exhaust gas receiver and comprising a plate-like element, plate-like The element is disposed perpendicular to the top surface of the housing and at the top edge at the top end of the plate-like element, at the bottom end, at the first edge facing the exhaust gas inlet, at the outlet The plate-like element being a plate extension between the exhaust gas inlet and the outlet, the exhaust gas flowing along the plate-like element from the exhaust gas inlet to the outlet A gas processing device having a plate extension and a droplet catch arranged at the second edge of the plate-like element,
An internal combustion engine system comprising
The gas handling device comprises a liquid supply configured to supply liquid along a portion of the top edge of the plate-like element such that the liquid flows from the top edge to the bottom edge of the plate-like element By means of the internal combustion engine system ensuring that it flows, it is achieved by the solution according to the invention.

  The gas treatment device described above may be fluidly connected to the exhaust gas receiver.

  In one embodiment, the plate-like element may have a first side and a second side, and the liquid supply may be configured to supply liquid to both the first side and the second side. .

  In another embodiment, a plurality of plate-like elements may be disposed within the housing, and the plurality of plate-like elements may be spaced apart from one another to form a flow path for the exhaust gas.

  The distances mentioned above may depend on the air flow rate and the acceptable pressure drop, and may also depend on the engine configuration.

  Also, the housing may have a cross section perpendicular to the plate extension, and the plate-like elements may be uniformly distributed along the cross section.

  Furthermore, every other plate-like element has a plate extension which is longer than the adjacent plate-like elements, such that the drop catcher is arranged along the housing extension from the exhaust gas inlet to the outlet. It is also good.

  In one embodiment, the liquid supply comprises liquid along at least 25% of the top edge, preferably along at least 50% of the top edge, more preferably along at least 75% of the top edge. It may be supplied.

  In another embodiment, the top surface of the housing may be part of a liquid container.

  The top surface mentioned above may have a through slot arranged opposite to the plate-like element.

  The through slot may form a liquid distribution channel.

  Furthermore, the plate-like element may project into the through slot.

  Additionally, the through slot has a predetermined width, the plate-like element has a predetermined thickness, and the predetermined width is such that a liquid flow passage is provided between the plate-like element and the slot, It may be larger than a predetermined thickness.

  Furthermore, a through slot may be arranged opposite the top edge of the plate-like element.

  Furthermore, a plurality of conduits may be provided, the conduits having an opening configured to face the top edge of the plate-like element.

  In one embodiment, the liquid supply transports the liquid to the plate-like element at a predetermined flow rate, and the flow rate may be adjusted according to the speed of the exhaust gas.

  In another embodiment, the liquid cooling unit may be configured to cool the liquid before the liquid is delivered to the liquid supply.

  In yet another embodiment, the collection container may be arranged below the bottom edge of the plate-like element.

  The liquid may also be a mixture of water and sodium hydroxide.

  Furthermore, one or more plate-like elements may be provided with one or more bends along the plate extension.

  The bend may be largest when closest to the second end of the one or more plate-like elements.

In one embodiment, the first edge of the plate-like element, defines an inlet range, the inlet range ^is 0.5 m 2 to 20 m ^2, a preferably 1.5m ² ~5.0m ² It is also good.

  In another embodiment, the droplet catch may be disposed along at least 75% of the second edge.

  A droplet catcher may be disposed above the bottom edge along the second edge. By locating the drop catcher along the bottom edge to the top along the second edge, complete collection is ensured.

  The droplet capture portion described above may have a V-shaped cross section or a U-shaped cross section.

In addition, the exhaust gas may contain SO ₃ aerosol, salt and soot particles.

  The internal combustion engine system according to the invention may further comprise a press scrubber.

  Additionally, a gas treatment device may be located downstream of the press scrubber.

  The internal combustion engine system may also include a water mist trap.

  Additionally, a gas treatment device may be placed upstream of the water mist trap.

  In one embodiment, the internal combustion engine system may comprise a cooling unit.

  A gas treatment device may be arranged upstream or downstream of the cooling unit adjacent to the cooling unit.

  In another embodiment, the internal combustion engine system may further comprise a scrubber disposed downstream of the cooling unit.

  In yet another embodiment, the internal combustion engine system may include a turbocharger.

  Additionally, a gas handling device may be located downstream of the turbocharger.

  Also, a cooling unit may be disposed downstream of the turbocharger and a gas processing device may be disposed downstream of the cooling unit and the turbocharger, respectively.

  In addition, exhaust gases may be split downstream of the exhaust gas receiver into exhaust gas recovery strings and turbocharger strings.

  In addition, a gas processing device may be fluidly connected to the exhaust gas recovery string and / or the turbocharger string.

  The internal combustion engine system may further comprise a scavenged gas receiver.

  The scavenged gas receiver described above may be fluidly connected to the internal combustion engine.

  Additionally, a gas treatment device may be located upstream of the scavenging gas receiver.

  Additionally, multiple gas processing devices may be disposed within the internal combustion engine system.

  Furthermore, two gas treatment devices may be arranged in series.

  Finally, the internal combustion engine may be a two-stroke internal combustion engine.

  The invention and the many advantages of the invention are explained in more detail below with reference to the attached schematic drawings. These figures show some non-limiting embodiments for the purpose of illustration.

Fig. 1 shows a schematic view of an engine system having an internal combustion engine according to the present invention. FIG. 1 shows a perspective view of a gas treatment device. Fig. 3 shows a perspective view of a plate-like element of a gas treatment device. Fig. 2 shows the gas treatment device of Fig. 1 without a top surface. FIG. 5 shows a schematic view of another embodiment of an internal combustion engine system. FIG. 5 shows a schematic view of another embodiment of an internal combustion engine system. FIG. 5 shows a schematic view of another embodiment of an internal combustion engine system. FIG. 5 shows a schematic view of another embodiment of an internal combustion engine system. FIG. 5 shows a schematic view of another embodiment of an internal combustion engine system. FIG. 7 shows a perspective view of another gas treatment device. FIG. 1 shows a perspective view of an internal combustion engine system having a gas treatment device.

  All figures are very schematic and not necessarily to scale, they show only those parts necessary to clarify the invention, other parts are omitted or just suggested Be done.

  FIG. 1 shows an internal combustion engine system 100 having an internal combustion engine 2, which is powered by a fuel, for example heavy oil, gas or diesel, and generates an exhaust gas. The internal combustion engine system 100 further comprises an exhaust gas receiver 3 configured to receive the exhaust gas, and a gas processing device 4 for processing the exhaust gas. The gas processing device 4 is arranged downstream of the exhaust gas receiver 3 which receives a part of the exhaust gas for the exhaust gas recirculation process, the other part of the exhaust gas being driven by the exhaust gas to drive the compressor 52 It is used to drive a turbocharger 50 having a turbine 51. Thus, the exhaust gas is split downstream of the exhaust gas receiver 3 into the exhaust gas recirculation string 48 and the turbocharger string 49.

The internal combustion engine system 100 further comprises a press scrubber 31 in which the exhaust gas comprises water (H ₂ O) and sodium hydroxide (NaOH) in the gas forming aerosols, salt particles, droplets and SO ₃ particles. It is processed by squirting the mixture of The gas processing device 4 is disposed downstream of the press scrubber 31 in order to remove aerosols, salt particles, droplets and SO ₃ particles formed in the press scrubber 31. Downstream of the gas handling device 4, the gas is cooled in a cooling unit 32, which is cooled in order to capture the remaining droplets in the gas before being received in the scavenging gas receiver 37. , In the scrubber 33 and subsequently in the water mist trap (WMC) 34 prior to flowing. A blower 35 is arranged to increase the pressure of the gas before it is received in the scavenging gas receiver 37 and sent back to the internal combustion engine 2. The gas from the compressor 52 of the turbocharger 50 is likewise cooled in the second cooling unit 38 and the droplets are captured in the second water mist trap 39 before being sent to the scavenged gas receiver 37 . The first valve 41 is configured to partially redirect the gas from the compressor 52, the second valve 42 is a switching valve, and the third valve 43 is disposed upstream of the press scrubber 31. And a shutdown valve.

  The gas processing device 4 of FIG. 2 comprises a housing 5 having a top surface 6, an exhaust gas inlet 7 and an outlet 8, and the gas processing device 4 is arranged in an upright position perpendicular to the top surface 6 of the housing 5. The plurality of plate-like elements 9 are provided. As shown in FIG. 3, each plate-like element 9 has a first surface 21 and a second surface 22 which are the main surfaces of the plate-like element 9. The plate-like element 9 has a top edge 10 at the top end 11 of the plate-like element 9, a bottom end 12 and a first edge 14 facing the exhaust gas inlet 7 of the housing 5 in FIG. And a second edge 15 facing the outlet 8 of the The plate-like element 9 extends between the exhaust gas inlet 7 and the outlet 8 to ensure that the exhaust gas flows along the plate-like element 9 from the exhaust gas inlet 7 to the outlet 8 as shown in FIG. A drop catcher 17 is disposed at the second edge 15 of the plate-like element 9 in order to capture a drop flowing along the plate-like element 9 with Ensure that the gas does not enter the second edge 15 again. The gas handling device 4 further comprises a liquid supply 8 configured to supply liquid along a portion of the top edge 10 of the plate-like element 9 shown in FIG. 3. An aqueous solution of NaOH is fed through one or more flanges 19 (shown in FIG. 2) so that the liquid is plate-shaped from the top 11 perpendicular to the flow direction of the exhaust gas along the plate extension 16. It is ensured that it flows towards the bottom end 12 of the element 9. The liquid supply 18 is configured to supply liquid to both the first side 21 and the second side 22 of each plate-like element 9, the liquid supply 18 along at least 25% of the top edge Preferably, the liquid is supplied along at least 50% of the top edge, more preferably along at least 75% of the top edge, whereby the first side 21 and the second side of the plate-like element 9 Provide a thin liquid layer that flows down along 22. As can be seen in FIG. 2, the top surface 6 of the housing 5 forms part of the liquid container 24 of the liquid supply 18 and the top surface 6 forms part of the bottom of the liquid container 24.

  In FIG. 3 the plate-like element 9 is provided with a number of bends 26 along the plate extension 16, the bends 26 having the bends 26 at the second end of the plate-like element 9. It grows along the plate extension 16 and the flow direction so as to be largest when near. In this way, the largest particles and droplets are not ejected and collide with the plate-like element 9 and the first portion 27 of the plate-like element 9 closest to the first edge 14. Capture, whereby the gas is captured as it flows along. Also, if the plate-like element 9 has a larger curvature 26 in the first part 27, the droplets and particles in the exhaust gas will flow more directly into the plate-like element 9, thus the plate-like element Instead of the droplets and / or particles staying on the plate-like element 9 and flowing into the droplet catcher 17, the droplets and / or particles are quickly separated into gas again. Induce a high risk of entering. The smaller droplets, particles and / or aerosols are captured further downstream in the larger bend 26 in the second portion 28 of the plate-like element 9. The droplet capture portion 17 is disposed along the at least 75% of the second edge 15 from the bottom end 12 upward along the second edge 15. The droplet capture portion 17 has a V-shaped cross section or a U-shaped cross section.

  The gas treatment device 4 of FIG. 4 comprises a plurality of plate-like elements 9 arranged in a housing 6, the mutual distance d between the plate-like elements 9 to form a flow path 23 for the exhaust gas. It is separated. In this way, the exhaust gas is flowed along each plate-like element 9 and is traced through its curve 26. The housing 5 has a cross section perpendicular to the plate extension 16 and the plate-like elements 9 are uniformly distributed along the cross section. Every other plate-like element 9 has a plate extension 16 which is longer than the adjacent plate-like elements 9, so that the droplet catcher 17 extends from the exhaust gas inlet 7 to the outlet 8. Guarantee to be placed along.

  In FIG. 10, the top surface 6 of the housing 5 of the gas treatment device 4 has a through slot 25 arranged opposite to the plate-like element 9, which forms a liquid distribution channel 30. The slot 25 is arranged opposite the top edge 10 of the plate-like element 9. The slot 25 has a predetermined width w, the plate-like element 9 has a predetermined thickness t, and the predetermined width w allows the liquid distribution channel 30 to be between the plate-like element 9 and the slot 25. In order to ensure that it is greater than the predetermined thickness t. Thus, the liquid in the liquid container 24 of the liquid supply 18 flows through the liquid distribution channel 30 formed between the slot 25 and the plate-like element 9 projecting into the slot 25 and flows down along the plate-like element 9. . A collection container 44 is arranged below the bottom end 12 of the plate-like element 9. In another embodiment, the gas treatment device 4 instead comprises a plurality of conduits having an opening configured to face the top edge 10 of the plate-like element 9. The conduit is then fluidly connected to the liquid supply 18.

First edge 14 of the plate-like element 9 in FIG. 10 defines an inlet range A _I, the inlet range is greater than the exhaust gas inlet 7. Inlet range _{A I} ^is 0.5 m 2 to 20 m ^2, preferably 1.5m ² ~5.0m ^2.

The liquid supply 18 conveys the liquid to the plate-like element 9 at a predetermined flow rate, which is adjusted in accordance with the speed of the exhaust gas. The liquid is a mixture of water (H ₂ O) and sodium hydroxide (NaOH).

  In FIGS. 1 and 5, the gas treatment device 4 is arranged upstream of the water mist trap. In FIG. 5, the gas treatment device 4 is arranged in direct fluid communication with the exhaust gas receiver 3 instead of the press scrubber 31 or the scrubber 33 (shown in FIG. 1). Thus, the gas treatment device 4 purifies the exhaust gas by only one process step before the gas flows into the cooling unit 32 and onto the water mist trap 34. The gas processing device 4 is disposed upstream of the cooling unit 32 and adjacent to the cooling unit 32.

  In FIG. 6, the gas processing device 4 is disposed adjacent to the cooling unit 32 and downstream of the cooling unit 32. The internal combustion engine system 100 comprises a press scrubber 31 upstream of the cooling unit 32 so that the exhaust gases are pretreated in the press scrubber 31 and cooled in the cooling unit 32 before entering the gas treatment device 4. Thus, the internal combustion engine system 100 does not require a water mist trap 34 (shown in FIG. 1) along the exhaust gas recirculation string 48 as the water mist is captured in the gas processing device 4.

  When powered by a given fuel, the internal combustion engine system 100 shown in FIG. 7 comprises only the gas handling device 4 and the blower 35 along the exhaust gas recirculation string 48. This is because the gas processing device 4 can clean the exhaust gases of all particles, droplets and aerosols in a sufficient manner. When run with a given type of fuel, the amount of particles, droplets and aerosols is greatly reduced, for example, as compared to heavy oil. Furthermore, if the internal combustion engine system 100 comprises only the gas handling device 4, the particles formed in the press scrubber 31 do not have to be removed as well. As shown in FIG. 7, the liquid cooling unit 45 is configured to cool the liquid before it is sent to the liquid supply of the gas treatment device 4.

  In FIG. 8, the gas processing device 4 is fluidly connected to the turbocharger string 49 and is located downstream of the turbocharger 50. The cooling unit 38 is located downstream of the turbocharger 50 and the gas processing device 4 is located downstream of both the cooling unit 38 and the turbocharger 50.

  In FIG. 9 two gas treatment devices 4 are arranged in the internal combustion engine system 100. One gas treatment device 4 is fluidly connected with the turbocharger string 49 and the other fluidly connected with the exhaust gas recirculation string 48. The gas handling device 4 is fluidly connected with the turbocharger string 49 and functions as both a cooler and a water mist trap. In another embodiment, two gas treatment devices 4 are arranged in series along one of the exhaust gas recirculation string 48 or the turbocharger string 49.

  The internal combustion engine 2 of the internal combustion engine system 100 is a two-stroke or four-stroke internal combustion engine 2.

  In FIG. 11, the internal combustion engine system 100 is shown in a perspective view and includes an exhaust gas receiver 3, a gas processing device 4 and an internal combustion engine 2.

  While the present invention has been described above in connection with the preferred embodiments of the present invention, certain modifications may occur to those skilled in the art without departing from the present invention as defined by the following claims. It is clear that

Reference Signs List 2 internal combustion engine, 3 exhaust gas receiver, 4 gas processing device, 5 housing, 6 top surface, 7 exhaust gas inlet, 8 outlet, 9 plate-like element, 10 top edge, 11 top end, 12 bottom end, 14 first Edge of the plate, 15 second edge, 16 plate extension range, 17 droplet capture portion, 18 liquid supply portion, 21 first surface, 22 second surface, 23 flow path, 24 liquid container, 25 penetration slots, 26 curved portion, 100 an internal combustion engine system, _{A I} inlet range, d the mutual distance

Claims (9)

-An internal combustion engine (2) generating exhaust gas,
An exhaust gas receiver (3) configured to receive said exhaust gas;
-A turbocharger (50) driven by said exhaust gas,
A gas treatment device (4) comprising a housing (5), said housing (5) comprising a top surface (6), an exhaust gas inlet (7) and an outlet (8), said gas treatment device comprising Disposed downstream of the exhaust gas receiver and comprising a plate-like element (9), the plate-like element (9) being disposed perpendicularly to the top surface (6) of the housing (5) And a top edge (10) at the top end (11) of the plate-like element (9), a bottom end (12) and a first edge facing the exhaust gas inlet (7) 14) and a second edge (15) facing the outlet (8), the plate-like element (9) being between the exhaust gas inlet (7) and the outlet (8) Plate exhaust range (16), wherein the exhaust gas flows from the exhaust gas inlet (7) to the outlet (8 A plate extension (16) and a liquid disposed at the second edge (15) of the plate-like element (9), which ensures that it flows along the plate-like element (9)). A gas processing device (4) having a drop capture portion (17);
An internal combustion engine system (100) comprising
The gas treatment device (4) comprises a liquid supply (18) configured to supply liquid along a portion of the top edge (10) of the plate-like element (9), whereby Ensuring that the liquid flows from the top end (11) towards the bottom end (12) of the plate-like element (9);
The exhaust gas is divided downstream of the exhaust gas receiver (3) into an exhaust gas recirculation string (48) and a turbocharger string (49) ,
The plate-like element (9) is provided with one or more bends (26) along the plate extension (16) and the second portion (28) of the plate-like element (9) is A curved portion (26) located downstream of the first portion (27) of the plate-like element (9) in the direction of gas flow, and larger than the curved portion of the first portion (27) equipped internal combustion engine system according to claim Rukoto (100).   The plate-like element (9) has a first surface (21) and a second surface (22), and the liquid supply portion (18) has the first surface (21) and the second surface. The internal combustion engine system (100) according to claim 1, characterized in that it is arranged to supply liquid to both sides (22).   A plurality of plate-like elements (9) are arranged in the housing (5), and the distance between the plurality of plate-like elements (9) to form a flow path (23) for the exhaust gas An internal combustion engine system (100) according to claim 1 or 2, characterized in that (d) they are spaced apart.   The liquid supply (18) preferably extends along at least 25% of the top edge (10), preferably along at least 50% of the top edge (10), more preferably the top edge (10). An internal combustion engine system (100) according to any one of the preceding claims, characterized in that liquid is supplied along at least 75% of.   An internal combustion engine system (100) according to any one of the preceding claims, characterized in that the top surface (6) of the housing (5) is part of a liquid container (24).   Internal combustion engine system (100) according to claim 5, characterized in that the top surface (6) comprises a through slot (25) arranged opposite the plate-like element (9).   Internal combustion engine system (100) according to claim 6, characterized in that the plate-like element (9) projects into the through slot (25). The liquid, water (H 2 _O) and an internal combustion engine system according to any one of claims 1 to 7, characterized in that a mixture of sodium hydroxide (NaOH) (100). Said first edge of said plate-like element (9) (14), defines an inlet range (AI), the inlet range (AI) ^is an der Rukoto between 0.5 m 2 to 20 m ² An internal combustion engine system (100) according to claim 3, characterized in that.

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