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A large turbocharged two-stroke diesel engine with exhaust gas purification

A diesel engine, turbocharging technology, applied in engine components, combustion engines, machines/engines, etc., can solve the problems of efficiency loss, fuel efficiency, complicated use, limited applicability of power turbines, etc., and achieve simple injection and supply systems. Effect

Active Publication Date: 2013-06-19
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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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In this context, existing SCR systems usually use complex and therefore expensive spraying systems for homogeneously distributing the ammonia or urea in the exhaust gas flow and, in order to ensure adequate mixing downstream, use often rather bulky dedicated so-called hybrid unit
Additionally the mixing unit contributes to the overall head loss (pressure loss) of the exhaust system, which equates to reduced turbocharger efficiency
Especially this loss of efficiency for turbochargers is unacceptable from a fuel efficiency point of view
Additionally, this pressure loss limits the applicability of power turbines driven by exhaust gas bypass flow (waste heat recovery—WHR)

Method used

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  • A large turbocharged two-stroke diesel engine with exhaust gas purification
  • A large turbocharged two-stroke diesel engine with exhaust gas purification
  • A large turbocharged two-stroke diesel engine with exhaust gas purification

Examples

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Embodiment Construction

[0042] In the following detailed description, a large two-stroke engine will be described by way of exemplary embodiments. Figure 1 to Figure 3 A large low speed turbocharged two stroke diesel engine with crankshaft 42 and crosshead 43 is shown. image 3 A diagrammatic representation of a large low-speed turbocharged two-stroke diesel engine with induction and exhaust systems is shown. In this exemplary embodiment, the engine has six in-line cylinders 1 . Large turbocharged two-stroke diesel engines typically have five to sixteen in-line cylinders carried by the engine frame 45 . The engine can be used, for example, as the main engine of an ocean-going vessel or as a stationary engine running an electric machine in a power station. The total output of the engine may for example be from 5,000 kW to 110,000 kW.

[0043] The engine is a two-stroke single-flow engine with scavenging ports in the bottom area of ​​cylinder 1 and exhaust valve 4 at the top of cylinder 1 . The ch...

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Abstract

The invention provides a large two-stroke diesel engine with a cross head, wherein the engine comprises: a plurality of inline cylinders (1), a turbocharger (5) and an SCR reactor (19). The SCR reactor (19) is arranged on upstream of the turbocharger and downstream of an exhaust gas receiver (3). The exhaust gas receiver (3) is connected to each cylinder (3) by relative exhaust pipes, and an outlet (33) is arranged on the exhaust gas receiver (3). A reducing agent is introduced into the exhaust gas receiver at an approximate upstream position at the outlet (33) of the exhaust gas receiver (3).

Description

technical field [0001] The present invention relates to a crosshead type large-scale turbocharged two-stroke internal combustion piston engine, which is preferably a diesel engine with an exhaust gas purification system, in particular to a diesel engine with a system for purifying exhaust gas and removing NO x The SCR (Selective Catalytic Reduction) reactor of the crosshead type large two-stroke diesel engine. Background technique [0002] Large two-stroke engines of the crosshead type are commonly used in the propulsion systems of large ships or as prime movers in power stations. Meeting emission requirements has been and will become increasingly difficult, especially for mononitrogen oxides (NO X ) level. [0003] Overall awareness of environmental issues is growing rapidly. There is currently discussion within the IMO (International Maritime Organization) of emissions limits in the form of air pollution at sea. Pundits in different parts of the world are taking simila...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N5/04F02B37/00B01D53/94
CPCY02T10/12B01D53/9409F01N3/2066F01N3/2896F02B25/04F02B37/00F01N2610/14F01N3/08
Inventor 斯特凡·迈尔
Owner 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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