Product line : Marine

Transcription

1 Product line : Marine

2 0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 PM g/kwh Aftertreatment system selection The problematic emissions from combustion in Diesel engines are nitrogen oxides [NO X ] and particulate or soot [PM].To reduce these emissions two types of emission aftertreatment devices are used: Mechanical injection Ultra modern common rail 0,500 0,450 Electronic injection Diesel Particulate Filter to trap the PM, DPF Selective Catalytic Reduction to reduce the NO X, SCR. The scoped legislations are MARPOL VI [TIER III] for coasters and sea going vessels, and Stage 4 for inland shipping in Europe and EPA TIER 4 for the inland vessels in U.S.A.. D P F 0,400 0,350 0,300 0,250 0,200 0,150 0,100 To fulfill MARPOL [TIER III], NO X must be reduced between 60 and 90%. This can be achieved by the Multronic SCR and SCR+ systems. 0,050 0,000 NOX g/kwh SCR

3 NOX g/kwh Aftertreatment system selection IMO Tier I IMO Tier II IMO (MARPOL 6) Tier III To fulfill Stage IV/V and EPA TIER 4 both NO X and PM must be reduced between 60 and 90%. This can be achieved by the Multronic EEV and SCRonDPF systems. For the marine market, Multronic has developed dedicated emission systems: specific catalytic coatings to be durable with the different fuels present 8 6 specific heat management and regeneration technologies for applications like propulsion, diesel electric and power generation RPM designs with low pressure drop, short mixing distances and airless urea dosing. protection methods to allow the usage of automotive sensors and components in harsh environments with low fuel qualities.

4 Marine Diesel engines Multronic scope Name Low speed Medium Speed High Speed Displacement (l/cyl) ,8-3 < 0,8 Power range (kw) kw Up to kw Up to 800 kw Up to 300 kw Combustion type 2-stroke & 4 stroke 2-stroke & 4 stroke 2-stroke & 4 stroke 4 stroke 4 stroke Rotation speed (rpm) >3000 The marine market is characterized by an enormous variety of engines and power ranges. Each type, application must fulfill different emission requirements.

5 Emission systems for ships Large cargo vessels, use low speed diesel engines, 2 and 4 stroke, and are powered by heavy fuel oil due to its low cost. This fuel contains high sulphur levels, phosphor and ash. All the components of the emission system, catalysts, sensors and actuator package must be selected specifically for this fuel. Inland vessels, coasters and luxury yachts have access to good quality fuels, use mainly medium and high speed diesel engines and have a load profile allowing the use of high efficient aftertreatment technology similar to onroad heavy duty emission systems..

6 Products for Inland vessels

7 Engine DOC/DEC Engine DOC and Open DPF systems for propulsion engines For some applicationans a DOC or open DPF systems can be sufficient to reduce PM. The cost is low, the installation is easy and there is no maintenance. Lowest cost of operation. T U R B O T U R B O Open,DPF OE DOC Open DPF CO HC PM NOX

8 DPF systems for propulsion engines Engine DOC/DEC Driven by local rules, environmental conscience, ship-owners or transport companies equip the propulsion engines of their vessels with DPF systems. The soot is trapped in the filter and is oxidised by means of a catalytic reaction that takes place between 280 and 420 C. Under normal operation this is the temperature present after the turbocharger in the exhaust stack. Nevertheless Multronic equips all the DPF systems with a back-up active regeneration system, Diesel Hydro Carbon Post Injection (DHCPI). In case of long periods of low engine load, the temperature of the exhaust gas is raised by the injection of fuel over the catalyst. The main advantages of the DHCPI system compared to a burner are: very large operational window Independent from the engine load fuel efficient temperature raise stepless temperature regulation no air injection needed T U R B O Diesel injecton DPF Temp 1 Press 1 Temp 2 Temp 3 OE DPF CO HC PM NOX NO NO2

9 DPF systems for generators Engine Heater Engine Heater DOC/DEC Generator T U R B O Temp 1 Temp 2 Press 1 Under low load conditions the exhaust gas temperature is artificially raised to oxidise the trapped soot. The electrical heater can be combined with a diesel oxidation catalyst and diesel post injection (DHCPI) to speed up the regeneration and enlarge the operational window of the system. DPF Temp 3 T U R B O Diesel injecton The main driver to install DPF s on ships is to avoid deposits of soot on the water around the ship, the hull and on the deck. The engines responsible for these practical problems are mainly the auxiliary engines used for the generators. Multronic has developed the E-DPF for a durable solution on generators. The DPF regenerates passively when the engine is loaded above 50%. DPF The coating on both the DPF and DOC can be chosen in function of the fuel quality. Multronic recommend the use of fuel with a maximum of 1000PPM sulphur. Generator Temp 1 Temp 2 Press 1 Temp 3 Temp 4

10 SCR systems for propulsion engines Engine Emission legislation for marine engines focuses mainly on Nitrogen oxide reduction. One of the most effective methods to reduce NO X is SCR, Selective Catalytic Reduction. Adblue / DEF, an aqueous urea solution is injected in the exhaust gas upstream of the SCR catalyst. The urea is transformed into ammonia and In the catalyst the ammonia reacts with the NOX and is reduced to nitrogen and water. T U R B O Urea dosing Press 1 Temp 1 SCR Temp 2 Standard SCR system OE SCR 0 CO HC PM NOX NO NO2

11 SCR+ systems for propulsion engines Engine DOC/DEC Hydro Cat. ASC To increase the efficiency of the SCR (SCR+ system) additional catalysts can be added to the system. A hydrolysing catalyst can help to form the ammonia at lower temperature, an ammonia slip catalyst can remove excessive ammonia that can slip through the system when high efficiencies are needed and an upstream diesel oxidation catalyst balances the relation between NO and NO2 to improve the system efficiency and urea consumption. A DOC can also be used, when needed, for crystal removal within the SCR system. NO2 NO SCR+ OE NOX Diesel injecton Optional Mixer AdBlue injection Mixer Optional PM SCR HC Press 1 Temp 1 Temp 2 Temp 3 Temp 4 NO X CO SCR + system

12 Combined DPF and SCR systems

13 Option 1 : Multronic EEV :DPF + SCR Engine DOC / DEC Hydro Cat. ASC Diesel injecton Mixer AdBlue injecton Mixer C/DPF SCR Press 1 Temp 1 Temp 2 Temp 3 Press / Temp 4 NO X Temp 5 Ref 2 To achieve Stage IV/V and EPA TIER 4 both NO X and PM must be reduced between 60 and 90%. This can be achieved with the Multronic EEV and SCRonDPF solutions OE SCR The Multronic EEV is a combination of 2 Multronic systems, the DHCPI particle filter and the Multronic SCR The efficiency of the system exceeds 90 % for the full range of emissions CO HC PM NOX NO NO2

14 Engine Option 2 : SCR on DPF Engine DOC / DEC DOC/DEC ASC ASC Diesel injecton Mixer AdBlue injecton Mixer C/DPF SCR Press 1 Temp 1 Temp 2 Temp 3 Press / Temp 4 NO X Temp 5 Ref 2 Diesel injecton Mixer AdBlue injecton Mixer SCR on DPF Press 1 Temp 1 Temp 2 Temp 3 Temp 4 NO X

15 System layout : combined DPF & SCR To reduce the size of the system Multronic has developed solutions to integrate the DPF and the SCR into the same substrate. The results is the SCR on DPF. The product was selected by the Dutch government in 2011 as the best potential solution to reduce emissions from inland vessels. DPF regeneration via NO 2 / fuel penalty for regeneration N of substrates* *(without hydrolysing catalyst and with end-zone coating for ASC when applicable) Total substrate volume / compactness of the system Passive & active heat management / fuel penalty Option 1 DPF => SCR Option 2 SCR => DPF Option 3 SCR on DPF Medium volume High thermal inertia Highest volume High thermal inertia Lowest volume Low thermal inertia Complexity of the temperature management High High Medium This resulted in 2 validation programs, one on a barge and one on a patrol vessel. N of cans N of temperature sensors Integration / geometrical freedom Installation Marine specific Low SV Low Pressure drop requirement 3 cans minimum 4 (optional 5) 4 cans minimum 4 (optional 5) 2 cans minimum 3 (optional 4)

16 Validation of SCR on DPF on two ships Barge Police Patrol ship This is considered as a normal application Engine: Scania V8 16 liter 450 kw Considered as a worst case scenario Engine : 2 x MTU V kw

17 The Barge The silencer The SCR on DPF

18 The patrol ship Urea dosing The housing SCRonDPF DOC HC dosing

19 The patrol ship The silencer The SCR on DPF

20 The patrol ship The control cabinet /monitor Urea tanks on top of the rudder system

21 Urea dosing & NO X measurements for large cargo vessels

22 Urea dosing multi nozzle Urea dosers Urea pressure rail & urea return rail NOx sampling

23 Urea dosing multi nozzle Urea Temp 1 Urea Press 1 MAP RPM Urea quality (option ) Urea Level SCR T1 SCR T2 NOX1 (Pre) NOX2 (Post) Master Slave Urea Press 2 Urea Temp 2 NOX1 Protect Air NOX1 Calib. Gas NOX2 Protect Air NOX2 Calib Gas Cool. valve Urea Pump (1) cont. Line Heat CAN OBD Inj 1 Inj 2 Inj 3 Inj 4 Inj 5 Inj 6 Urea Pump (2) Cont.