JP2017180460A - Internal Combustion Engine System - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improved gas processing device by removing and preventing formation of SOaerosol, salt and soot particles more effectively than that of a well-known scrubber.SOLUTION: This invention relates to an internal combustion engine system comprising a gas processing device 4 including an internal combustion engine for generating exhaust emission, an exhaust emission receiving container constituted to receive exhaust emission and a housing 5. The housing has a top surface 6, an exhaust emission inlet 7 and an outlet 8. The gas processing device is arranged at a downstream side of the exhaust emission receiving container. There is provided a plate-like element 9 and the gas processing device has a plate extending range 16 and a liquid droplet catching part 17 arranged at a second edge part of the plate-like element. The gas processing device includes a liquid supplying part configured to supply liquid along a part of the top edge part of the plate-like element.SELECTED DRAWING: Figure 2

Description

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

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

Before the exhaust gas is recirculated, the temperature must be lowered and treated against particles and sulfur, thereby preventing engine damage. One method of treating exhaust gas is by a press scrubber process in which NaOH / water is injected into exhaust recirculation (EGR) gas. During evaporation, SO ₃ aerosol, 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, another solution is needed that can supplement or even replace known scrubbers / filters, which is the high particle content formed during the press scrubber process. This is because the already known filter technology is clogged very quickly.

The object of the present invention is to completely or partially overcome the disadvantages and drawbacks of the prior art described above. More specifically, it is an object of the present invention to provide an improved gas treatment device that 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 that will become apparent from the following description are:
-An internal combustion engine generating exhaust gas;
An exhaust gas receiver configured to receive 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, The element is arranged perpendicular to the top surface of the housing and is at the top edge at the top end of the plate-like element, at the bottom end, the first edge facing the exhaust gas inlet, and at the outlet A second edge facing, the plate-like element being in a plate extension range between the exhaust gas inlet and the outlet, wherein the exhaust gas flows along the plate-like element from the exhaust gas inlet to the outlet A gas treatment device having a plate extension range and a droplet trap disposed at the second edge of the plate-like element
An internal combustion engine system comprising:
The gas treatment device comprises a liquid supply configured to supply liquid along a portion of the top edge of the plate-like element, whereby liquid is transferred from the top edge to the bottom edge of the plate-like element. The solution according to the invention is achieved by an internal combustion engine system that ensures that it flows towards.

  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 surface and a second surface, and the liquid supply unit may be configured to supply liquid to both the first surface and the second surface. .

  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 each other to form a flow path for the exhaust gas.

  The distance described above may depend on the air velocity and the allowable pressure loss, and may depend on the engine configuration.

  The housing may also have a cross section perpendicular to the plate extension range, and the plate-like elements may be evenly distributed along the cross section.

  Furthermore, every other plate-like element has a longer plate extension range than adjacent plate-like elements so that the droplet trapping part is arranged along the housing extension range from the exhaust gas inlet to the outlet. Also good.

  In one embodiment, the liquid supply dispenses 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. You may supply.

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

  The top surface described above may have a through slot disposed opposite the plate-like element.

  The through slot may form a liquid distribution channel.

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

  In addition, 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.

  In addition, 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 unit may transport 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 it is sent to the liquid supply.

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

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

  Further, one or more plate-like elements may be provided with one or more curved portions along the plate extending range.

  It may be greatest when the curved portion is closest to the second end of 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 Also good.

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

  The droplet trapping part may be disposed upward from the bottom edge along the second edge. By placing the drop catcher upward from the bottom edge along the second edge, complete collection is assured.

  The droplet trapping unit described above may have a V-shaped cross section or a U-shaped cross section.

Further, the exhaust gas may include SO ₃ aerosol, salt and soot particles.

  The internal combustion engine system according to the present invention may further include a press clubber.

  Furthermore, a gas processing device may be arranged downstream of the press clubber.

  The internal combustion engine system may 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 include a cooling unit.

  A gas treatment device may be disposed adjacent to the cooling unit, upstream or downstream of 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 comprise a turbocharger.

  Further, a gas treatment device may be disposed downstream of the turbocharger.

  Further, the cooling unit may be disposed downstream of the turbocharger, and the gas processing device may be disposed downstream of each of the cooling unit and the turbocharger.

  Further, the exhaust gas may be divided downstream of the exhaust gas receiver into an exhaust gas recovery string and a turbocharger string.

  In addition, a gas treatment 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 scavenging gas receiver.

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

  Additionally, a gas processing device may be placed upstream of the scavenging gas receiver.

  Furthermore, a plurality of gas processing devices may be arranged in the internal combustion engine system.

  Furthermore, two gas processing devices may be arranged in succession.

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

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

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

  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 merely suggested Is done.

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

The internal combustion engine system 100 further includes a press scrubber 31 in which the exhaust gas is water (H ₂ O) and sodium hydroxide (NaOH) in gas forming aerosol, salt particles, droplets and SO ₃ particles. Processed by spouting a mixture of The gas treatment device 4 is disposed downstream of the press clubber 31 in order to remove aerosol, salt particles, droplets and SO ₃ particles formed in the press clubber 31. Downstream of the gas treatment device 4, the gas is cooled in the cooling unit 32, which cools the gas 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 before flowing into the water mist trap (WMC) 34. 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 similarly cooled by the second cooling unit 38, and the droplets are captured by the second water mist trap 39 before being sent to the scavenging gas receiver 37. . The first valve 41 is configured to change the direction of 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 clubber 31. And a shutdown valve.

  The gas treatment device 4 of FIG. 2 includes a housing 5 having a top surface 6, an exhaust gas inlet 7 and an outlet 8, and the gas treatment device 4 is disposed in an upright position perpendicular to the top surface 6 of the housing 5. A 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 that are main surfaces of the plate-like element 9. The plate-like element 9 comprises a top edge 10 at the top end 11 of the plate-like element 9, a bottom end 12, 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. The plate-like element 9 has a plate extension between the exhaust gas inlet 7 and the outlet 8 in order 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 trap 17 having a coverage area 16 is arranged at the second edge 15 of the plate-like element 9 for catching a drop flowing along the plate-like element 9, thereby Ensures that it does not re-enter the gas at the second edge 15. The gas processing device 4 further includes a liquid supply unit 8, which is configured to supply liquid along a part of the top edge 10 of the plate-like element 9 shown in FIG. 3. An aqueous NaOH solution is routed through one or more flanges 19 (shown in FIG. 2) so that the liquid is plate-like from the top end 11 perpendicular to the flow direction of the exhaust gas along the plate extension range 16. Ensure that it flows towards the bottom end 12 of the element 9. The liquid supply unit 18 is configured to supply liquid to both the first surface 21 and the second surface 22 of each plate-like element 9, and the liquid supply unit 18 extends along at least 25% of the top edge. , Preferably supplying liquid 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 A thin liquid layer flowing down along 22 is provided. 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 unit 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 curved portions 26 along the plate extending range 16, and the curved portion 26 is located at the second end of the plate-like element 9. It becomes larger along the plate extension range 16 and the flow direction so that it becomes the largest when close. In this way, the largest particles and droplets are not fired 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. At which the gas is trapped 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, and thus the plate-like element Instead of the droplets and / or particles remaining on the plate-like element 9 and flowing into the droplet catcher 17, the droplets and / or particles are immediately separated into gas again. Trigger a high risk of entering. Smaller droplets, particles and / or aerosols are captured further downstream at the larger curvature 26 in the second portion 28 of the plate-like element 9. The droplet capturing unit 17 is disposed along the second edge 15 upward from the bottom end 12 and along at least 75% of the second edge 15. The droplet capturing unit 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, with a mutual distance d between the plurality of plate-like elements 9 to form a flow path 23 for the exhaust gas. It is separated. In this way, the exhaust gas flows along each plate-like element 9 and follows its curved portion 26. The housing 5 has a cross section perpendicular to the plate extension range 16, and the plate-like elements 9 are evenly distributed along the cross section. Every other plate-like element 9 has a plate extension range 16 that is longer than the adjacent plate-like element 9, so that the droplet trapping portion 17 can extend from the exhaust gas inlet 7 to the outlet 8 in the housing extension range 29. 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 disposed opposite the plate-like element 9, and the through slot 25 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 is provided by the liquid distribution channel 30 between the plate-like element 9 and the slot 25. Is greater than a predetermined thickness t. Accordingly, the liquid in the liquid container 24 of the liquid supply part 18 flows through the liquid distribution channel 30 formed between the slot 25 and the plate-like element 9 protruding 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 has instead a plurality of conduits with openings configured to face the top edge 10 of the plate-like element 9. The conduit is 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 unit 18 transports the liquid to the plate-like element 9 at a predetermined flow rate, and the flow rate is adjusted according to the speed of the exhaust gas. The liquid is a mixture of water (H ₂ O) and sodium hydroxide (NaOH).

  1 and 5, the gas processing device 4 is disposed upstream of the water mist trap 34. In FIG. 5, the gas treatment device 4 is placed in direct fluid communication with the exhaust gas receiver 3 instead of the press scrubber 31 or scrubber 33 (shown in FIG. 1). Therefore, 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 adjacent to the cooling unit 32 upstream of 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 includes a press clubber 31 upstream of the cooling unit 32, so that the exhaust gas is pretreated in the press clubber 31 and cooled in the cooling unit 32 before entering the gas processing 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 because water mist is trapped within the gas treatment device 4.

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

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

  In FIG. 9, two gas processing devices 4 are arranged in the internal combustion engine system 100. One gas treatment device 4 is fluidly connected to a turbocharger string 49 and the other is fluidly connected to an exhaust gas recirculation string 48. The gas treatment device 4 is fluidly connected to the turbocharger string 49 and functions as both a cooler and a water mist trap. In another embodiment, the 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 2-stroke or 4-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 the internal combustion engine 2.

  While the present invention has been described above with reference to preferred embodiments of the invention, those skilled in the art will envision certain modifications without departing from the invention as defined by the following claims. Obviously.

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 edge, 12 Bottom edge, 14 1st Edge, 15 second edge, 16 plate extension range, 17 droplet capturing part, 18 liquid supply part, 21 first face, 22 second face, 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 (10)

An internal combustion engine (2) that generates exhaust gas;
An exhaust gas receiver (3) configured to receive the exhaust gas;
A gas treatment device (4) comprising a housing (5), the housing (5) having a top surface (6), an exhaust gas inlet (7) and an outlet (8), the gas treatment device comprising: It is arranged downstream of the exhaust gas receiver and comprises a plate-like element (9), the plate-like element (9) being arranged perpendicular to the top surface (6) of the housing (5). And a first 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) between the exhaust gas inlet (7) and the outlet (8) Of the exhaust gas from the exhaust gas inlet (7) to the outlet (8). ) To ensure that it flows along the plate-like element (9) until the plate extension range (16) and the liquid arranged at the second edge (15) of the plate-like element (9). A gas treatment device (4) having a drop trap (17);
An internal combustion engine system (100) comprising:
The gas treatment device (4) comprises a liquid supply (18) configured to supply liquid along a part of the top edge (10) of the plate-like element (9), thereby An internal combustion engine system (100) characterized by ensuring that the liquid flows from the top end (11) towards the bottom end (12) of the plate-like element (9).   The plate-like element (9) has a first surface (21) and a second surface (22), and the liquid supply part (18) has the first surface (21) and the second surface (22). 2. Internal combustion engine system (100) according to claim 1, characterized in that it is configured to supply liquid to both faces (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. (D) Internal combustion engine system (100) according to claim 1 or 2, characterized in that it is spaced apart.   The liquid supply (18) is 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). The internal combustion engine system (100) according to any one of claims 1 to 3, characterized in that the liquid is supplied along at least 75%.   The internal combustion engine system (100) according to any one of claims 1 to 4, characterized in that the top surface (6) of the housing (5) is part of a liquid container (24).   6. Internal combustion engine system (100) according to claim 5, characterized in that the top surface (6) has a through slot (25) arranged facing the plate-like element (9).   The internal combustion engine system (100) according to claim 6, characterized in that the plate-like element (9) protrudes into the through slot (25). The internal combustion engine system (100) according to any one of claims 1 to 7, wherein the liquid is a mixture of water (H ₂ O) and sodium hydroxide (NaOH).   The one or more plate-like elements (9) are provided with one or more curved portions (26) along the plate extension range (16). An internal combustion engine system (100) according to any one of the preceding claims. Wherein the first edge of the plate-like elements (9) (14), defines an inlet range _{(A I),} the inlet range _{(A I)} ^is between the 0.5 m 2 to 20 m ^2, preferably the internal combustion engine system according to claim 3, characterized in that between 1.5m ² ~5.0m ² (100).

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