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Large supercharged diesel engine with scr reactor

A diesel engine, selective technology, applied in the direction of machines/engines, engine components, combustion engines, etc., can solve the problems of annihilation, fuel efficiency reduction, etc.

Active Publication Date: 2009-10-07
曼能解决方案(曼能解决方案德国股份公司)分公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

such reductions in fuel efficiency are highly undesirable and would wipe out most of the recent gains in fuel efficiency

Method used

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  • Large supercharged diesel engine with scr reactor
  • Large supercharged diesel engine with scr reactor

Examples

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Embodiment Construction

[0026] In the following detailed description, the invention will be described by way of preferred embodiments. figure 1 A large turbocharged two-stroke diesel engine 1 of crosshead type with intake and exhaust systems is shown. The engine 1 has a charge air receiver 2 and an exhaust gas receiver 3 . The exhaust valves belonging to the combustion chamber are indicated by 4. The engine 1 can be used, for example, as a main engine in a seagoing vessel or as a stationary engine for running a generator in a power station. The total output of the engine may for example be in the range of 5000 to 110000 kW, but the invention may also be used with four stroke diesel engines having an output of eg 1000 kW.

[0027] Charge air moves from charge air receiver 2 to scavenging ports (not shown) of each cylinder. When the exhaust valve 4 is opened, the exhaust gas flows into the exhaust receiver 3 through the first exhaust duct and flows forward through the first exhaust duct 5 to the tur...

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PUM

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Abstract

The present invention relates to a large supercharged diesel engine (1), comprising a turbocharger having an exhaust gas -driven turbine (6) and a compressor (9) driven by the turbine and supplying charging air to the engine cylinders. The engine (1) is provided with a SCR reactor (20) downstreams of the turbine (6) for reducing NOx in the exhaust gases to N2 and H2O. A heating unit (19) increases the temperature of the exhaust gases at the high pressure side of the turbocharger turbine (6), so that the exhaust gases entering the SCR reactor (20) have a temperature of at least 330 DEG C. A portion of the exhaust gas flow is branched off upstream of the turbocharger turbine (6) and led to a power turbine (31). The overall fuel efficiency of the engine is improved relative to an engine in which both the heating unit (19) and the SCR reactor (20) are placed at the low pressure side of the turbocharger turbine (6).

Description

technical field [0001] The present invention relates to a large supercharged diesel engine, such as the main engine of a ship, equipped with x (nitrogen oxides) SCR (Selective Catalytic Reduction) reactor that purifies exhaust gas. Background technique [0002] Public awareness of environmental issues is increasing rapidly. Discussions are currently underway within the IMO (International Maritime Organization) regarding emission limits in the form of air pollution at sea. Pundits around the world are taking similar steps. An example is the EPA (Environmental Protection Agency) regulations currently under discussion. [0003] NO in exhaust x Can be restored in primary and / or secondary restore methods. Primary methods are those that directly affect the combustion process of the engine. The actual degree of reduction depends on the engine type and reduction method, but varies from 10% to over 50%. The secondary method is a means of reducing the emission level without alt...

Claims

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Application Information

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IPC IPC(8): F01N3/18F02B37/00
CPCY02T10/16F02B61/04F01N3/2033F01N5/04F02B41/10F01N2590/02F02B33/34Y02T10/24F02B37/04F02B37/18Y02T10/144F01N3/2066F02B37/001Y02T10/166Y02T10/163F01N5/02F02B37/20F02G5/02F02B37/005Y02T10/26F02B63/04Y02E20/18F02B39/10Y02T10/12B01D53/94F01N3/18F01N3/24F02B37/00
Inventor 尼尔斯·谢姆楚普
Owner 曼能解决方案(曼能解决方案德国股份公司)分公司