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Exhaust gas recirculating device for marine diesel engine

A technology for exhaust gas recirculation and marine diesel engines, which is applied in the direction of exhaust gas recirculation, exhaust devices, noise reduction devices, etc., can solve problems affecting engine reliability and life, achieve high gas-liquid mass transfer efficiency, reduce damage, reduce The effect of small load

Pending Publication Date: 2018-05-08
CSSC POWER INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SO in recycled exhaust gas 2 Particles and particles will corrode and wear cylinders and other components exposed to EGR exhaust gas, thus affecting the reliability and life of the engine

Method used

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  • Exhaust gas recirculating device for marine diesel engine
  • Exhaust gas recirculating device for marine diesel engine
  • Exhaust gas recirculating device for marine diesel engine

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Embodiment Construction

[0031] The following describes the application of the dynamic wave scrubber to the marine EGR system of the present invention in conjunction with the accompanying drawings, but this should not limit the protection scope of the present invention.

[0032] see Figure 1 ~ Figure 3 , figure 1 It is a structural schematic diagram of the marine diesel engine recirculation exhaust gas system of the present invention, figure 2 Structural outline drawing of special braking power wave scrubber, image 3 It is the top view of the special braking force wave scrubber. As shown in the figure, the special power wave scrubber is arranged after the exhaust header and cone, and before the air cooler;

[0033] It can be seen from the figure that the marine diesel engine exhaust gas recirculation scrubber of the present invention includes a dynamic wave scrubber 3, and the dynamic wave scrubber 3 includes a plurality of reverse nozzle pipes 11 distributed between two plates 12 fixed in the m...

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Abstract

An exhaust gas recirculating device for a marine diesel engine comprises a dynamic wave washer. By means of the characteristics of efficient washing and high heat exchanging coefficients of the dynamic wave washer, particular matter and sulfur dioxide in exhaust gas are removed, the exhaust gas is cooled to a certain degree, and the washed exhaust gas is subjected to further cooling of an air cooler, dewatering of a drip separator and pressurizing of an air blower, enters a scavenging header and a combustor to take part in combustion. By means of the exhaust gas recirculating device for the marine diesel engine, efficient washing of the circular exhaust gas can be achieved; compared with existing EGR washing equipment, the structure is greatly simplified, and the initial investment and therunning cost of EGR are reduced; and great potential is provided for following upgrading and improving of the EGR device.

Description

technical field [0001] The invention relates to a marine diesel engine, in particular to an exhaust gas recirculation device for a marine diesel engine. Background technique [0002] The increasingly stringent emission regulations in the global shipping industry have been introduced one after another. The Tire II standard adopted by the International Maritime Organization has come into effect in early 2011, and the Tier III standard has also been implemented in 2016, which means that the NOx emission level must be achieved in the emission control area (ECA) Significantly lower (80% lower than Tier II). There are two main technical routes for low-speed diesel engines to achieve Tier III emissions: [0003] One is to use exhaust gas recirculation (EGR) and other means to reduce NOx emissions in the machine; [0004] The second is to use catalytic reduction post-treatment technology (SCR) to reduce NOx emissions outside the machine. Compared with the SCR technology route, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/04F01N3/08F02M26/35
CPCF01N3/04F01N3/0828F02M26/35
Inventor 张文博宋雅丽颜峰
Owner CSSC POWER INST CO LTD
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