KR20130127737A - An apparatus for preventing scr device blocking using waste heat of ship - Google Patents

An apparatus for preventing scr device blocking using waste heat of ship Download PDF

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Publication number
KR20130127737A
KR20130127737A KR1020120051484A KR20120051484A KR20130127737A KR 20130127737 A KR20130127737 A KR 20130127737A KR 1020120051484 A KR1020120051484 A KR 1020120051484A KR 20120051484 A KR20120051484 A KR 20120051484A KR 20130127737 A KR20130127737 A KR 20130127737A
Authority
KR
South Korea
Prior art keywords
exhaust gas
scr device
main engine
engine
passes
Prior art date
Application number
KR1020120051484A
Other languages
Korean (ko)
Inventor
한주석
Original Assignee
현대중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020120051484A priority Critical patent/KR20130127737A/en
Publication of KR20130127737A publication Critical patent/KR20130127737A/en

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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
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N3/26—Construction of thermal 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
    • 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
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
    • 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
    • F01N2340/06—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the arrangement of the exhaust apparatus relative to the turbine of a turbocharger
    • 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

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

Abstract

The present invention relates to an apparatus for preventing a blockage of an SCR device using waste heat of a vessel, which is capable of preventing a blockage of the SCR device since temperatures of exhaust gas of a main engine are increasing by heat-exchanging exhaust gas coming from an outer heat source in a low-speed drive of an engine with exhaust gas of the main engine. The invention comprises: a main engine of a vessel; a turbo charger (30) for passing exhaust gas, which is generated from the main engine; an SCR device (20) for passing the exhaust gas, which passes through the turbo charger; a heat exchanger (60), which is equipped between the turbo charger and the SCR device in order to increase temperatures by heat-exchanging exhaust gas with an outer heat source before the exhaust gas passes through the SCR device, after the exhaust gas coming from the main engine passes through the turbo charger. [Reference numerals] (10) Main engine;(20) SCR device;(40) Chimney;(50) Auxiliary engine

Description

An Apparatus for Preventing SCR Device Blocking using Waste Heat of Ship}

The present invention relates to an apparatus for preventing clogging of an SCR device using waste heat of a ship, and more particularly, by heat-exchanging exhaust gas from an external heat source and exhaust gas of a main engine during low-speed operation of an engine to increase the exhaust gas temperature of a main engine. By discharging through the SCR device, it is possible to prevent clogging of the SCR device.

In general, a marine engine is equipped with a main engine as a propulsion engine and a bogie engine as a power generation engine.

Among these ship engines, the main engine contains more nitrogen oxides (NOx) in the exhaust gas than the bogie engine (usually a four-stroke double-fuel engine). There is provided an SCR device for the reduction.

As shown in FIG. 1, the exhaust gas generated from the operation of the main engine 10 passes through an SCR device (Selective Catalytic Reduction Device) 20, and then passes through the turbocharger 30 to form a stack ( Through 40) to the atmosphere.

By the way, during low-speed operation, the temperature of the exhaust gas from the main engine 10 does not become high. When such exhaust gas passes through the SCR apparatus 20, when a reducing agent is injected into the exhaust pipe through the injector, The reducing agent is converted to ammonia by the heat of the exhaust gas, and the nitrogen oxide is reduced to nitrogen gas and water as a catalytic reaction between the nitrogen oxide in the exhaust gas by the SCR catalyst and the ammonia.

At this time, when the sulfur in the exhaust gas is changed, a hole in the SCR device 20 may be clogged, which occurs when the temperature of the exhaust gas passing through the SCR device 20 is low.

Therefore, the exhaust gas which passes through the SCR apparatus 20 must always pass while maintaining a predetermined high temperature.

However, in the related art, the exhaust gas temperature of the engine does not have any problem at high speed operation. However, since a predetermined temperature is not achieved at low speed operation, the SCR device 20 may not be prevented from clogging.

Republic of Korea Patent Publication No. 10-2011-83944 (published: 2011.7.21)

Accordingly, the present invention has been made to solve the conventional problems as described above, an object of the present invention is to pass through the SCR device while maintaining the temperature of the exhaust gas discharged from the engine at a predetermined temperature even during low speed operation of the vessel By doing so, it is possible to prevent clogging of the SCR device.

Solution to Problem The present invention for achieving the above object, the main engine of the ship; A turbocharger for allowing exhaust gas generated from the main engine to pass therethrough; An SCR device for allowing exhaust gas passing through the turbocharger to pass therethrough; A heat exchanger provided between the turbocharger and the SCR apparatus so that the exhaust gas from the main engine passes through the turbocharger and then heats up with an external heat source before being passed through the SCR apparatus; It will be configured to include.

The external heat source consists of a bogie engine.

As described above, the present invention exchanges heat with the waste heat of the exhaust gas generated from the bogie engine, which is an external heat source, even during low-speed operation, when the temperature of the exhaust gas generated during the operation of the ship main engine is low. By discharging, it is possible to prevent the clogging phenomenon of the SCR device, which occurs when the temperature of the exhaust gas is low, in advance.

Accordingly, there is an effect that can extend the life of the SCR device.

1 is a block diagram illustrating a process of discharging exhaust gas of a conventional ship main engine.
2 is a block diagram illustrating an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating an embodiment of the present invention. As shown in the figure, according to an embodiment of the present invention, the exhaust gas from the main engine 10 passes through the turbocharger 30, and then passes through the stack 40 through the SCR device 20 In the process, the heat exchanger 60 is configured to heat up the heat exchanger with the external heat source before the exhaust gas of the main engine 10 passes through the SCR device 20.

In one embodiment of the present invention, the external heat source is a bogie engine 50, the waste heat of the exhaust gas from the bogie engine 50 and the exhaust gas from the main engine 10 in the heat exchanger (60) It is to heat up by heat exchange.

According to one embodiment of the present invention having such a configuration, the exhaust gas generated by the operation of the main engine 10 is discharged through the stack 40 through the SCR device 20, if, of the main engine 10 In low speed operation, the exhaust gas temperature is lower than in high speed operation.

Therefore, in the process of exhaust gas generated from the bogie engine 50, which is an external heat source, to the atmosphere through the stack 40, the heat exchange with the exhaust gas of the main engine 10 through the heat exchanger 60, thereby raising the temperature Exhaust gas of the main engine 10 in the closed state passes through the SCR device 20, so that clogging of the SCR device 20 can be prevented.

10: main engine
20: SCR device
30: turbocharger
40: stack
50: Bogie Engine
60: heat exchanger

Claims (2)

The main engine of the ship;
A turbocharger (30) through which exhaust gas generated from the main engine (10) passes;
An SCR device 20 through which the exhaust gas passing through the turbocharger 30 passes;
Exhaust gas from the main engine 10 passes through the turbocharger 30, and then passes between the turbocharger 30 and the SCR device 20 so as to heat up with an external heat source before passing through the SCR device 20. A heat exchanger (60) provided at the;
Blocking device of the SCR device using the waste heat of the ship, characterized in that comprising a.
The method according to claim 1,
The external heat source is a bogie engine 50, the blockage preventing device of the SCR device using the waste heat of the ship, characterized in that.
KR1020120051484A 2012-05-15 2012-05-15 An apparatus for preventing scr device blocking using waste heat of ship KR20130127737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120051484A KR20130127737A (en) 2012-05-15 2012-05-15 An apparatus for preventing scr device blocking using waste heat of ship

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120051484A KR20130127737A (en) 2012-05-15 2012-05-15 An apparatus for preventing scr device blocking using waste heat of ship

Publications (1)

Publication Number Publication Date
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160102695A (en) 2015-02-23 2016-08-31 현대중공업 주식회사 Heating system and method for selective catalytic reduction apparatus
KR20160102694A (en) 2015-02-23 2016-08-31 현대중공업 주식회사 Heating system and method for selective catalytic reduction apparatus
US9714600B2 (en) 2014-03-25 2017-07-25 Hyundai Heavy Industries Co., Ltd. System and method for reducing harmful substances of ship and ship using the same
KR20170099128A (en) * 2016-02-23 2017-08-31 현대중공업 주식회사 Selective Catalytic Reduction System for Energy Saving
US10533473B2 (en) 2014-12-22 2020-01-14 Alfa Laval Corporate Ab Exhaust gas treatment system and method, as well as ship comprising, and use of, such a system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9714600B2 (en) 2014-03-25 2017-07-25 Hyundai Heavy Industries Co., Ltd. System and method for reducing harmful substances of ship and ship using the same
US10533473B2 (en) 2014-12-22 2020-01-14 Alfa Laval Corporate Ab Exhaust gas treatment system and method, as well as ship comprising, and use of, such a system
KR20160102695A (en) 2015-02-23 2016-08-31 현대중공업 주식회사 Heating system and method for selective catalytic reduction apparatus
KR20160102694A (en) 2015-02-23 2016-08-31 현대중공업 주식회사 Heating system and method for selective catalytic reduction apparatus
KR20170099128A (en) * 2016-02-23 2017-08-31 현대중공업 주식회사 Selective Catalytic Reduction System for Energy Saving

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