IMO NOx Tier III technology for UE Engine

LP-SCR system

Mar. 2023
Japan Engine Corporation© 2023 Japan Engine Corporation

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NOx emission control area（ECA）
The emission regulations of IMO for NOx and sulfur content in fuel are getting strict year by year.
As for the NOx regulation, from 2011 Tier II regulation is in effect.
As the result of MEPC66, from 2016 Tier III regulation became into effect.
Its level is over 75% less than that of Tier II inside of ECA. Outside of ECA its emission level issame as Tier II.

＜NOx-ECA＞（2021～）

Existing ECA© 2023 Japan Engine Corporation

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1. NOx Tier

IMO NOx Tier III Solutions

UEC engine complies with IMO NOx Tier III regulation

by LP-EGR, HP-SCR or LP-SCR system, which has the enough ability
to reduce NOx emission for the regulation.

①METHODS IN-ENGINE- EGR (Exhaust Gas Recirculation)②AFTER TREATMENT- SCR (Selective Catalytic Reduction)© 2023 Japan Engine Corporation

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Contents
1

Design Concepts

2

Development and delivery records of LP-SCR

3

Actual Arrangement for Shop Test

4

Maintenance in Service© 2023 Japan Engine Corporation

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Mar. 2023

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Design Concept of Low Pressure-SCR (LP-SCR)

Simple configuration and operationGood performance and high reliability

Switching the SCR operation does not affect the engine andturbocharger performance, but it switch the valves only.
Simple configuration:
For engine optimized operation, only one valve is controlled.
Good response and stability in the maneuvering andfor load fluctuation in heavy weather

Minimum SFOC penalty to achieve the exh. gas temperature
required for denitration
Kept and verified high reliability
in fundamental and full-scale on-board tests, started from nationalproject.

Reduction of CAPEX / OPEX

Low maintenance cost, due to simple configuration
Contribute the low fuel cost, due to SFOC advantage over competitors

No black-box: SCR control system is developed by J-ENG.

Smooth switching of SCR operation

Optimized operation for compatible performance and reliability© 2023 Japan Engine Corporation

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WMS-H860

Mar. 2023【Outline of 6UEC33LSE-C2-SCR】

Unauthorized reproduction and copying prohibited5Configuration of LP-SCR System
PROVISIONALEngine Room

RSV-2

C/R
EIP

BoilerSCR
Reactor

Reactor box

SBV

SCR Control unit

Mixing unit withinjection nozzle
Dosing unit

Urea water tank

RSV-1

Burner

AUS40

Pump unit
RBV: Engine Builder scope: Integrated in Engine(Engine builder’s scope): Compressed air line
: Urea water line

: Fuel oil (max.0.1%S)© 2023 Japan Engine Corporation

EGBV: Exh. gas bypass valve
RSV: Reactor sealing valve
RBV: Reactor bypass valve
SBV: Soot blow valve
EIP: Engine Interface Panel

Exh. gas manifold
EGBV※Urea water tank : Shipyard scope

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At Tier3
mode

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UE engine

Mar. 2023

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6

Example Arrangement on board

SCR Reactor
Exh. Gas
Economizer

Reactor Sealing Valve 2
Reactor Sealing Valve 1

Mixing unit
BurnerPump unit
Dosing unit

Urea Tank

Reactor Bypass Valve

View from Fore side

View from Stbd. side© 2023 Japan Engine Corporation

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7Contents
1

Design Concepts

2

Development and delivery records of LP-SCR

3

Actual Arrangement for Shop Test

4

Maintenance in Service© 2023 Japan Engine Corporation

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WMS-H860

Mar. 2023

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LP-SCR Development / Delivery Record
As of Mar. 2023
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018

Prototypefull-scale test

2019

2020

2022

2021

Design Test

2023

2024

In ServiceScheme A

Research De-NOx performance with exh gas of 2st engineFundamental
test

Long-term
Endurance
Deterioration test
test foron board
catalyst© 2023 Japan Engine Corporation

Confidential 複写・転載禁止★2018-4/ 6-33LSE(2023-4) 6-50LSH-Eco★
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Contents
1

Design Concepts

2

Development and delivery records of LP-SCR

3

Actual Arrangement for Shop Test

4

Maintenance in Service© 2023 Japan Engine Corporation

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WMS-H860

Mar. 2023

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10

Overview of LP-SCR system in Shop test
RSV-2

RBV

SCR Reactor
Mixing Unit
Injection Nozzle

Exhaustgas flow

(Urea water spray)

RSV-1© 2023 Japan Engine Corporation

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11

SCR Equipment
3. SCR初号機対応
据付状況 arrangement in Shop test②③ ④①②Dosing unit andSCR control panel①SCR Reactor
with Soot blower© 2023 Japan Engine Corporation

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④Urea tank
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12

Contents
1Design Concepts

2

Development and delivery records of LP-SCR

3

Actual Arrangement for Shop Test

4

Maintenance in Service© 2023 Japan Engine Corporation

Confidential 複写・転載禁止

WMS-H860

Mar. 2023

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Maintenance of LP-SCR in service
Maintenance interval
3monthsDe-nitration
Performance(Spot Check)

Catalyst(Replacement of Catalyst)

6months

12months

Remarks
18
months36
months60
monthsNOx measurement every
12 months✔

Replaced when SCR
operating time reaches
10,000hrs or 3 years after
first use, whichever comes
first

✔

Dosing unit

(Replacement of Solenoid
Valve, etc.)

VCP(Replacement of Board)✔
✔

For mechanical engines

In addition to the above, there are inspections of electrical components and filters,
but it is not always necessary to replace them, and they will be replaced according
to the inspection status.
© 2023 Japan Engine Corporation

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Spot Check (1)Sampling connection

Because of denitration performancein service, SCR should be carried out
annual spot check.
It is described in Resolution
MEPC. 291 (71) Chapter



The NOx emission will be measured /analyzed in two sampling connections ofexh. gas piping.
1) NOx emission after engine outlet
2) NOx emission after SCR reactor© 2023 Japan Engine Corporation

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Spot Check (2)〈 Representative portable NOx analyzer (Testo350 Maritime) 〉

 For spot check of LP-SCR, the below
items should be prepared and used.
1) Low sulfur fuel oil under S 0.1%and less (LSMDO, LSMGO)
2) 32 or 40% Urea solution*(AUS32 or 40)3) NOx analyzer

Portable NOx analyzer is available
for spot check.
(e.g. Testo350 Maritime, etc)*: The concetration of usable urea solution
depends on SCR specification.
Source: photo supplied by Testo K.K© 2023 Japan Engine Corporation

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Thank you

Japan Engine Corporation
1, Minamifutami, Futami-cho, Akashi,

Hyogo Pref., 674-0093, Japan
www.j-eng.co.jp© 2023 Japan Engine Corporation

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WMS-H860

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