Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
  • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
  • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
  • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
  • F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63H—MARINE PROPULSION OR STEERING
  • B63H21/00—Use of propulsion power plant or units on vessels
  • B63H21/32—Arrangements of propulsion power-unit exhaust uptakes; Funnels peculiar to vessels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
  • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
  • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
  • F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
  • F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
  • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
  • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
  • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
  • F01N3/28—Construction of catalytic reactors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
  • F01N2340/02—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the distance of the apparatus to the engine, or the distance between two exhaust treating apparatuses
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
  • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
  • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
  • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
  • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Definitions

• the present invention relates to a device for catalytic exhaust gas purification of internal combustion engines in a vessel or other vehicle.
• the invention is particularly suited for cases wherein the available installation space for the exhaust gas purification equipment is very limited, which is normally the case for example in post-installation of modern exhaust gas purification equipment aboard ships.
• one or more substantially vertical ducts for exhaust channels extend from the engine room of the ship and up to one or more funnels via all decks in the ship. Separate exhaust channels extend within the duct/ducts from the main engines of the ship and its smaller auxiliary engines.
• a catalyzer unit Upon installation of a catalytic exhaust gas purification equipment, a catalyzer unit is normally installed somewhere along each exhaust channel.
• the duct is furthermore originally dimensioned solely for the exhaust channels, whereby the installation of conventional catalyzer units often requires an undesired extension of the duct.
• a known way to post-install a catalytic exhaust gas purification equipment is to locally alter the extension of the exhaust channels so that there is room for the conventional catalyzer units.
• a number of such solutions have been presented with more or less complicated extensions of the exhaust channels.
• a common disadvantage of these known solutions is, however, that additional valuable space aboard has to be used for the installation, which intrudes upon the original functions of the ship.
• Such solutions also requires more extensive rebuilds, that in many cases can not be made during a planned docking occasion of the ship.
• a device for catalytic exhaust gas purification of at least two internal combustion engines in a vessel or other vehicle comprising: a first exhaust channel connected to a first internal combustion engine and; a second exhaust channel connected to a second internal combustion engine, said second exhaust channel extending substantially parallel to the first exhaust channel within a duct adapted thereto; - a first catalyzer unit for purification of exhaust gases in the second exhaust channel, and - a second catalyzer unit for purification of exhaust gases in the first exhaust gas channel.
• first catalyzer unit and said second catalyzer unit are arranged in line with each other within said duct, whereby - the first catalyzer unit is provided with an integrated by pass section for the first exhaust channel, and the second catalyzer unit is provided with an integrated bypass section for the second exhaust channel.
• each of said by pass sections comprises a longitudinal recess in an externally limiting surface of the respective catalyzer unit.
• the catalyzer units exhibit a substantially quadrangular cross-section, whereby said recess is formed in a corner of the respective catalyzer unit.
• the by passing exhaust channel in each respective catalyzer unit is axially movably arranged in said recess, in order to avoid thermal stress in the design as a consequence of large temperature differences between the first and the second exhaust channel.
• the by passing exhaust channel in each respective catalyzer unit is suitably attached to the catalyzer unit by means of at least two attachment rings provided with vibration dampening elements.
• each catalyzer unit is provided with at least one flow-directing member located adjacent to an inlet in the catalyzer unit.
• the flow-directing member is arranged to direct a portion of the exhaust gas flow radially outwards towards peripheral edge-portions within the catalyzer unit.
• two flow-directing members are positioned in a row adjacent to said inlet.
• the flow-directing members may, for example, consist of a substantially flat plate provided with a plurality of perforations.
• the first catalyzer unit is located at a predetermined distance from the second catalyzer unit, in such a way that a section of each respective exhaust channel extends there between.
• the first catalyzer unit is located in immediate proximity to the second catalyzer unit.
• the first catalyzer unit is integrally formed with the second catalyzer unit.
• two or more groups each of a first catalyzer unit and a second catalyzer unit, respectively, are arranged in such a way that the first and second catalyzer unit in a group are located at the same elevational level as the corresponding first and second catalyzer unit, respectively in an adjoining group.
• Fig. 1 shows a diagrammatic side view of a device according to a first embodiment of the invention
• Fig. 2 shows an enlarged cross sectional view through a catalyzer unit according to an exemplary embodiment of the invention
• Fig. 3 shows a top view of the catalyzer unit previously shown in Fig. 2, and Fig. 4 finally shows an alternative embodiment of the invention, wherein the first catalyzer unit is located in immediate proximity to the second catalyzer unit.
• reference numeral 1 generally denotes a device for catalytic exhaust gas purification of at least two internal combustion engines (not shown) in a vessel (not shown) or other vehicle.
• a first exhaust channel 2 is connected to a first internal combustion engine A and a second exhaust channel 4 is connected to a second internal combustion engine (only indicated in the lower part of the figure with the letter B).
• the vessel is furthermore provided with two more internal combustion engines, that are indicated in the figure with reference letters C and D, respectively.
• the engines C, D are connected in the same way with a first exhaust channel 6 and a second exhaust channel 8, respectively.
• the four internal combustion engines A, B, C, D constitute the main engines of the vessel shown in the example, and are normally marine diesel engines of a known type.
• FIG. 1 A human figure 10 has been drawn in the lower part of Fig. 1 in order to illustrate the scale of the device according to the invention. Furthermore, some of the decks of the vessel are diagrammatically indicated with reference signs DK3 to DK10 to the left in Fig. 1.
• the embodiment shown in Fig. 1 comprises two groups I, II, each including a first and a second exhaust channel 2, 4 and a first and second exhaust channel 6, 8, respectively.
• Group I thus includes the main engines A, B while group II includes main engines C, D.
• two catalyzer units 12, 14 and 16, 18, respectively are arranged in a row in groups next to each other within a duct 20.
• Each group I, II is thus provided with a first catalyzer unit 12, 16 for purification of combustion exhaust gases in the second exhaust channel 4, 8 of each group, and a second catalyzer unit 14, 18 for purification of combustion exhaust gases in the first exhaust channel 2, 6 of each group.
• the invention may also be used in vessels having either only two main engines, or having more than four main engines.
• Fig. 1 it is shown that the second exhaust channel 4 extends substantially parallelly with the first exhaust channel 2 within the duct 20.
• the duct 20 has a predetermined cross sectional dimension and is substantially rectangularly formed, and extends from the main engines A, B, C, D and up to a not shown funnel.
• only two partition walls 22, 24 are shown in the duct 20.
• a parallel duct 26 contains exhaust channels 28 from four auxiliary engines E, F, G, H. These will, however, not be described here, since they are of comparatively lesser dimension, whereby conventional catalyzer units 30 may be used without creating a lack of space in the parallel duct 26.
• Fig. 1 it is also shown that the first catalyzer unit 12 and the second unit 14 in the first group I are located at the same elevational level as the corresponding first catalyzer unit 16 and second catalyzer units 18, respectively, in the adjoining second group II.
• first catalyzer unit 12 and the second unit 14 in the first group I are located at the same elevational level as the corresponding first catalyzer unit 16 and second catalyzer units 18, respectively, in the adjoining second group II.
• Fig. 2 and 3 only the exhaust channels 2, 4 and catalyzer units 12, 14, respectively, will be described below in group I.
• Group II and any additional groups are hereby designed in a corresponding manner.
• Fig. 2 shows an enlarged cross sectional view through the second catalyzer unit 14 in group I, according to an exemplary embodiment of the invention.
• the catalyzer unit 14 exhibits a catalyzer passage 32 for the first exhaust channel 2, and a bypass section 34 for the second exhaust channel 4, which is integrated in the catalyzer unit 14.
• Several active catalyzer layers 36 are in a known manner arranged within the catalyzer passage 32. It should be noted that the design of the other catalyzer units 12, 16, 18 corresponds to the design of the catalyzer unit 14.
• the main principle of the invention is: - that the first catalyzer unit 12 and the second catalyzer unit 14 are arranged in a row within said duct 20, whereby the first catalyzer unit 12 is provided with an integrated bypass section 34 for the first exhaust channel 2 and - the second catalyzer unit 14 is provided with a corresponding integrated by pass section 34 for the second exhaust channel 4.
• each of said bypass sections 34 comprises a longitudinal recess 38 in the externally limiting surface 40 of the catalyzer unit 14.
• the catalyzer unit 14 exhibits a substantially quadrangular cross- section in this embodiment, whereby the recess 34 is formed in a corner of the catalyzer unit 14.
• the by passing exhaust channel 4 in the catalyzer unit 14 is axially movably arranged in said recess 38.
• the exhaust channel 4 is attached to the recess 38 of the catalyzer unit 14 by means of at least two attachment rings (not shown) provided with vibration dampening elements (not shown) .
• the catalyzer unit 14 is provided with two flow-directing members 42 located in a row adjacent to an inlet 44 in the catalyzer unit 14.
• the flow-directing members 42 each consist of a substantially flat plate provided with a plurality of perforations 46, and are arranged to direct a portion of the exhaust gas flow radially outwards towards peripheral edge-portions 48 - as shown in Fig. 3 - within the catalyzer units 14.
• the catalyzer unit 14 may only be provided with one flow- directing member 42, or more than two may also be used.
• the first catalyzer unit 12, 16 in each group I, II is located at a predetermined distance from the second catalyzer unit 14, 18, in such a way that a section 50 of each respective exhaust channel 2, 4, 6, 8 extends there between.
• the elevational levels of the catalyzer units 12, 14, 16, 18 are adapted to existent deck levels DK3 to DK10 in the vessel in order to enable access for service and inspection via doors 52.
• the first catalyzer unit 12, 16 may instead be located in immediate proximity to the second catalyzer unit 14, 18, if the deck arrangement of the vessel so requires with respect to access for service and inspection.
• the first catalyzer unit 12, 16 is integrally formed with the second catalyzer units 14, 18, whereby an inner partition wall 54 is diagrammatically drawn with a dashed line between the units.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Engineering & Computer Science (AREA)
• Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Ocean & Marine Engineering (AREA)
• Exhaust Gas After Treatment (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Cited By (6)

Citations (3)

• 2003
  • 2003-09-09 SE SE0302405A patent/SE526912C2/sv not_active IP Right Cessation
• 2004
  • 2004-09-09 WO PCT/SE2004/001299 patent/WO2005023641A1/en active Application Filing
  • 2004-09-09 EP EP04775404A patent/EP1670682A1/en not_active Withdrawn

Patent Citations (3)

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