• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    With heavy oil-powered internal combustion engine (10), in particular with heavy oil-powered marine diesel engine, with an at least single-stage exhaust gas turbocharging and with an exhaust gas purification, wherein the exhaust gas purification is carried out denitrification and desulfurization of the exhaust gas, the denitrification and desulfurization in a combined DeSOxNOx device (14 ), in which the denitrification and the desulfurization of an exhaust gas flow are combined. (Fig. 1a)
    公开号:CH706957B1
    申请号:CH01285/13
    申请日:2013-07-18
    公开日:2017-06-30
    发明作者:Toshev Plamen；Schlüter Stephan
    申请人:Man Diesel & Turbo Se；
    IPC主号:
    专利说明:

    Description: [0001] The invention relates to a combustion engine operated with heavy oil according to the preamble of claim 1 or 9.
    When operated with heavy fuel internal combustion engines is the peculiarity that the fuel used, ie the heavy oil, has a high sulfur content. Sulfur oxides can react with other constituents of the exhaust gas and lead to deposits which impair the effectiveness of the exhaust gas purification. This is a disadvantage. There is therefore a need for an internal combustion engine which has an effective exhaust gas purification even when operating with heavy oil, in which in particular an effective desulfurization and denitrification and possibly dedusting of the exhaust gas of the internal combustion engine is possible.
    Proceeding from this, the invention is based on the object to provide a novel fuel-powered with heavy fuel internal combustion engine.
    This object is achieved according to a first aspect of the invention by an internal combustion engine according to claim 1. After this, denitrification and desulphurization are carried out in a combined DeSOxNOx device, in which the denitrification and the desulphurisation of an exhaust gas flow are combined.
    With the first aspect of the invention, it is proposed that the denitrification and the desulfurization combined be carried out in a combined DeSOxNOx device. This can provide effective denitrification and desulfurization without the need for an SCR catalyst.
    According to a second aspect of the invention, this object is achieved by an internal combustion engine according to claim 9. This is followed by desulfurization in a DeSOx device and denitrification separately in an SCR catalytic converter, wherein an ammonia metering device and a hydrolysis catalytic converter are positioned in a bypass line which is guided around at least the DeSOx device.
    According to the second aspect of the invention, the denitrification and the desulfurization are carried out separately, namely the desulfurization in a DeSOx device and denitrification in an SCR catalyst. In this case, at least the DeSOx device is positioned in a branch which is bridged by the bypass line in which the ammonia metering device and the hydrolysis catalytic converter are positioned. This also makes effective denitrification and desulfurization possible.
    Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawing. Showing:
    Fig. 1a is a schematic representation of a supercharged internal combustion engine according to a first embodiment of a first aspect of the invention;
    Fig. 1b is a schematic representation of a supercharged internal combustion engine according to a second embodiment of the first aspect of the invention;
    1c is a schematic representation of a supercharged internal combustion engine according to a third embodiment of the first aspect of the invention;
    Fig. 1d is a schematic representation of a supercharged internal combustion engine according to a fourth embodiment of the first aspect of the invention;
    1e is a schematic representation of a supercharged internal combustion engine according to a fifth embodiment of the first aspect of the invention;
    Fig. 1f is a schematic representation of a supercharged internal combustion engine according to a sixth embodiment of the first aspect of the invention;
    Fig. 1g is a schematic representation of a supercharged internal combustion engine according to a seventh embodiment of the first aspect of the invention;
    1h is a schematic representation of a supercharged internal combustion engine according to an eighth embodiment of the first aspect of the invention;
    Fig. 2a is a schematic representation of a supercharged internal combustion engine according to a first embodiment of a second aspect of the invention; and
    2b is a schematic representation of a supercharged internal combustion engine according to a second embodiment of the second aspect of the invention.
    The invention relates to a fuel oil-fired internal combustion engine, in particular a fuel oil-powered marine diesel engine. Fuel-powered internal combustion engines have the peculiarity that the fuel used by them, namely heavy fuel oil, has a relatively high sulfur content. Undesirable reactions of sulfur oxides with other exhaust gas components can lead to deposits that affect the effectiveness of the exhaust gas purification. This can be avoided in the inventive internal combustion engine.
    1a to 1b show embodiments of an inventive internal combustion engine according to a first aspect of the present invention.
    1a shows a first embodiment of an engine 10 operated with heavy oil according to the first aspect of the present invention, wherein the internal combustion engine 10 comprises an at least single-stage exhaust gas turbocharger.
    In an exhaust gas turbocharger, the exhaust gas leaving the exhaust gas is expanded in at least one turbine stage, wherein this energy is used to compress the internal combustion engine 10 to be supplied charge air in at least one compressor stage. In Fig. 1a, a turbine stage 11 of such an internal combustion engine 10 is shown schematically with exhaust gas turbocharging. It should be noted that the exhaust gas turbocharger can also be designed in several stages.
    Further, Fig. 1a shows a so-called wastegate 12, which is positioned in a bypass line 13, via the bypass line 13 exhaust gas at the or each turbine stage 11 of the exhaust gas turbocharging can be passed, namely, when the provided by the engine 10 exhaust stream is greater than the exhaust gas flow that is needed in the turbocharger.
    Exhaust gas, which is passed either via the or each turbine stage 11 of the exhaust gas turbocharger or past the or each turbine stage 11 via the wastegate 12 and the bypass line 13 is subjected to an exhaust gas purification, the exhaust gas purification at least denitrification and desulfurization of the Exhaust gas makes.
    According to the first aspect of the present invention, the denitrification and desulfurization are carried out in a combined DeSOxNOx device 14, in which therefore the denitrification and the desulfurization of the exhaust gas are combined or integrated.
    In the embodiments of FIGS. 1a, 1b, 1c and 1d, the exhaust gas bypass line 13, which can be opened and closed via the wastegate 12, further assigned to an ammonia generator 15, an ammonia dosing device 16 and a hydrolysis catalyst 17, wherein the ammonia generator 15 ammonia is provided, which is injected via the ammonia dosing device 16 in the guided over the bypass line 13 partial exhaust gas stream, wherein subsequently this partial exhaust stream is passed through the hydrolysis catalyst 17. This partial exhaust gas flow conducted via the hydrolysis catalytic converter 17 is mixed in a mixer 18 with that partial exhaust gas flow which is conducted via the turbine stage 11, this mixed exhaust gas stream then being supplied to the combined DeSOxNOx device 14 for combined desulfurization and denitrification. With the aid of the ammonia generator 15, the ammonia metering device 16 and the hydrolysis catalytic converter 17, the denitrification of the exhaust gas can be optimized. With the ammonia generator 15, ammonia is generated externally and injected via the ammonia metering device 16 into the exhaust gas conducted via the bypass line 13.
    Fig. 1b shows a second embodiment of the first aspect of the invention, wherein the embodiment of Fig. 1b differs from the embodiment of Fig. 1a in that downstream of the illustrated turbine stage 11 and upstream of the mixer 18, an oxidation catalyst 19 is positioned , on the basis of which therefore exclusively via the or each turbine stage 11 guided exhaust gas can be performed. The partial exhaust gas flow, which is guided depending on the position of the wastegate 12 via the bypass line 13, however, is guided past the oxidation catalyst 19. In the oxidation catalyst 19 is followed by a conversion of nitrogen oxide into nitrogen dioxide, whereby the denitrification of the exhaust gas can be improved.
    Fig. 1c shows a third embodiment according to the first aspect of the present invention, wherein the embodiment of Fig. 1c from the embodiment of Fig. 1a differs in that downstream of the mixer 18 and upstream of the DeSOxNOx device 14, a charging device 20 is positioned to electrostatically charge exhaust particulates, particularly soot and ash, of the exhaust stream passing over the DeSOxNOx device 14 so that the exhaust particulates may be deposited in the DeSOxNOx device 14 for dedusting the exhaust gas. An electrode of the charging device 20 for the electrostatic charging of the exhaust particles is positioned directly in front of the inlet or in the inlet of the DeSOxNOx device 14.
    Fig. 1d shows a fourth embodiment of the first aspect of the present invention, wherein the embodiment of Fig. 1d, the features of the embodiments of Figs. 1b and 1c combined with each other, and thus in Fig. 1d both upstream of the mixer 18 a Oxidation catalyst 19 and downstream of the mixer 18, a charging device 20 are positioned.
    Further embodiments of the first aspect of the present invention show Fig. 1e to 1h, wherein the embodiments of Figs. 1e to 1h of the embodiments of FIGS. 1a to 1d differ in that in the embodiments of FIG. 1 e to 1 h to an ammonia generator 15, a Ammoniadosiereinrichtung 16 and a hydrolysis catalyst 17 in the bypass line 13 is omitted.
    On the contrary, in the embodiments of FIGS. 1e to 1h of the combined DeSOxNOx device 14, a device 21 for injecting and evaporating urea into the exhaust gas flow upstream, whereby both the exhaust gas, which is passed over the turbine stage or those 11, as well as that exhaust gas, which is guided via the bypass line 13, is conveyed through the device 21 for injection and evaporation of the urea in the exhaust gas stream.
    In the embodiment of Fig. 1 f of this device 21 for injection and evaporation of urea in the exhaust stream upstream of an oxidation catalyst 19, which in turn serves to convert nitrogen oxide into nitrogen dioxide and thus the improvement of the denitrification of the exhaust gas.
    In Fig. 1g of the device 21 for injection and evaporation of urea, a charging device 20 downstream of the electrostatic charge of exhaust particles of the exhaust stream, said charging device 20 in turn is the combined DeSOxNOx device 14 upstream. Again, an electrode of the charger 20 is positioned immediately in front of the inlet or inlet of the combined DeSOxNOx device to electrostatically charge and deposit soot and ash and other off-gas particles to provide for dedusting of the exhaust gas.
    In the embodiment of FIG. 1h, in turn, the features of the embodiments of FIGS. 1f and 1g are combined, so that accordingly the internal combustion engine of FIG. 1h comprises both the oxidation catalyst 19 and the charging device 20.
    1 a to 1 h is therefore common that a denitrification and desulfurization take place in a combined DeSOxNOx device 14, in which therefore the denitrification and the desulfurization of the exhaust gas are combined or integrated. This makes effective denitrification and desulfurization possible even without an SCR catalytic converter.
    The denitration can be improved by using an oxidation catalyst 19. A dedusting of the exhaust gas can be realized via the integration of a charging device 20 in the exhaust gas treatment immediately upstream of the combined DeSOxNOx device 14.
    The combined DeSOxNOx device 14 is preferably a fixed bed adsorber in which, in particular, activated carbon is used as the adsorbent.
    2a and 2b show embodiments of a second aspect of the present invention, wherein in the embodiments of Figs. 2a and 2b, in turn, a heavy oil-powered internal combustion engine 110 is shown with an at least one-stage turbocharging and exhaust gas purification. At least one turbine stage 111 is shown from the exhaust gas turbocharger, wherein exhaust gas can be conducted past the or each turbine stage 111 via a wastegate 112 and a bypass line 113.
    According to the second aspect of the invention, the desulfurization is carried out in a DeSOx device 114 and denitrification in a separate SCR catalyst 115, so that therefore unlike the first aspect of the present invention, the denitrification and desulfurization not combined, but rather separately, done. According to the exemplary embodiments of FIGS. 2 a and 2 b of the second aspect of the invention, the bypass line 113, which is guided around at least the DeSOx device 114, is assigned an ammonia generator 116, an ammonia metering device 117 and a hydrolysis catalytic converter 118.
    Exhaust gas conducted via the bypass line 113 is therefore guided past both the or each turbine stage 111 and the DeSOx device 114. Downstream of the DeSOx device 114, the mixture of the partial exhaust gas stream conducted via the hydrolysis catalytic converter 118 takes place in a mixer 119 with the partial exhaust gas stream conducted via the DeSOx device 114, the mixed partial streams subsequently being conducted via the SCR catalytic converter 115.
    In a variant of Fig. 2b, a charging device 120 is additionally present, which is the DeSOx device 114 upstream, namely such that one electrode of the charging device 120 for the electrostatic charging of exhaust particles immediately before the inlet or in the inlet of the DeSOx device 114 is positioned. This makes it possible to electrically charge the dedusting of the exhaust soot and ash and deposit in the DeSOx device 114.
    REFERENCE SIGNS LIST 10 internal combustion engine 11 turbine stage 12 wastegate
    权利要求:
    Claims (11)
    [1]
    13 Bypass line 14 DeSOxNOx device 15 Ammonia generator 16 Ammonia dosing device 17 Hydrolysis catalyst 18 Mixer 19 Oxidation catalyst 20 Charging device 21 Device 110 Internal combustion engine 111 Turbine stage 112 Wastegate 113 Bypass line 114 DeSOx device 115 SCR Catalyst 116 Ammonia generator 117 Ammonia dosing device 118 Hydrolysis catalyst 119 Mixer 120 Charging device Claims
    1. With heavy oil-powered internal combustion engine, in particular with heavy oil operated marine diesel engine, with an at least single-stage turbocharging and exhaust purification, wherein the exhaust gas purification is carried out denitrification and desulfurization of the exhaust gas, characterized in that the denitrification and desulfurization in a combined DeSOxNOx device (14), in which the denitrification and the desulfurization of an exhaust gas flow are combined.
    [2]
    2. Internal combustion engine according to claim 1, characterized by a charging device (20) for the electrostatic charging of exhaust particles of the exhaust stream immediately upstream of the combined denitration and desulfurization, wherein an electrode of the charging device (20) for the electrostatic charging of the exhaust particles immediately upstream of an inlet or in the inlet DeSOxNOx device (14) is positioned.
    [3]
    3. Internal combustion engine according to claim 1 or 2, characterized by means (21) for injection and evaporation of urea in the exhaust gas stream, which is positioned upstream of the DeSOxNOx device (14).
    [4]
    4. Internal combustion engine according to claim 3, characterized in that the device (21) for the injection and evaporation of urea in the exhaust gas flow upstream of an oxidation catalyst (19), which converts nitrogen oxide into nitrogen dioxide.
    [5]
    5. Internal combustion engine according to claim 3 or 4, characterized in that the means (21) for injection and evaporation of urea upstream of the Aufladereinrichtung (20) is positioned.
    [6]
    6. Internal combustion engine according to claim 1 or 2, characterized by an ammonia metering device (16) and a hydrolysis catalyst (17), which are positioned in a bypass line (13), which is guided around at least one turbine stage (11) of the exhaust gas turbocharger, wherein one over the Bypass line (13) guided exhaust partial stream upstream of the DeSOxNOx device (14) with the over the respective turbine stage (11) guided partial exhaust stream in a mixer (18) is miscible.
    [7]
    7. Internal combustion engine according to claim 6, characterized in that the mixer (18) is positioned upstream of the supercharger (20).
    [8]
    8. Internal combustion engine according to claim 6 or 7, characterized in that the mixer (18) is preceded by an oxidation catalyst (19), which converts nitrogen oxide into nitrogen dioxide.
    [9]
    9. With heavy oil-powered internal combustion engine, in particular with heavy oil operated marine diesel engine, with at least one stage turbocharging and exhaust purification, wherein the exhaust gas purification is carried out denitrification and desulfurization of the exhaust gas, characterized in that the desulfurization in a DeSOx means (114) and the denitrification in an SCR catalyst (115) is performed separately, wherein an ammonia dosing device (117) and a hydrolysis catalyst (118) are positioned in a bypass line (113) which is guided around at least the DeSOx device (114).
    [10]
    10. Internal combustion engine according to claim 9, characterized in that the bypass line (113) is guided around at least one turbine stage (111) of the exhaust gas turbocharger.
    [11]
    11. Internal combustion engine according to claim 9 or 10, characterized by a charging device (120) for the electrostatic charging of exhaust particles of the exhaust stream immediately upstream of the DeSOx device (114), wherein an electrode of the charging device (120) for the electrostatic charging of the exhaust particles immediately before an inlet or positioned in the inlet of the DeSOx device (114).
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    同族专利:
    公开号 | 公开日
    KR102077866B1|2020-04-07|
    DE102012017312A1|2014-03-06|
    KR20140031122A|2014-03-12|
    CH706957A2|2014-03-14|
    FI20165970A|2016-12-15|
    FI127470B|2018-06-29|
    FI20135846A|2014-03-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
    2017-09-29| PCAR| Change of the address of the representative|Free format text: NEW ADDRESS: BELLERIVESTRASSE 203 POSTFACH, 8034 ZUERICH (CH) |
    2018-11-30| PFA| Name/firm changed|Owner name: MAN ENERGY SOLUTIONS SE, DE Free format text: FORMER OWNER: MAN DIESEL AND TURBO SE, DE |
    2022-02-28| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    DE201210017312|DE102012017312A1|2012-09-03|2012-09-03|Internal combustion engine e.g. heavy oil operated marine diesel combustion engine has denitrification and desulfurization unit that is arranged to perform combined denitrification and desulfurization of exhaust gas stream|
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