The IMO Tier III requirements reduce nitrogen-oxide emissions by approximately 76% in comparison to a Tier II engine.
Reinforced environmental regulation for emissions to air-IMO NOx Tier III relevant for all vessels with keel laying on or after 1 January 2016 with engine output of 130kW and above, when operating in NOx emission control areas.
STX-SCR system is the latest and the most proven technology to promise reducing NOx emissions by and upto 90% and it also provide best solutions such as Internal By-pass system, NOx feedback control to fit variety of needs.
STX-SCR SYSTEM Layout
STX-SCR SYSTEM Group
All components will be selected according to engine power.
This table is the references for system design.
| Classification | Engine power(kw) | Reactor DimensionH(mm) / W(mm) / D(mm) | Mixer+pipe(DN) | 40% Urea Cons.(liter / hr / engine) |
|---|---|---|---|---|
| Group 1 | 500 ~ 900 | 2,500 / 890 / 1,020 | 350 | 10 |
| Group 2 | 910 ~ 1,400 | 2,400 / 1,210 / 1,020 | 450 | 12 |
| Group 3 | 1,470 ~ 2,000 | 2,400 / 1,680 / 1,490 | 500 | 29 |
| Group 4 | 2,100 ~ 3,000 | 2,500 / 1,680 / 1,650 | 700 | 38 |
| Group 5 | 3,500 | 2,600 / 1,680 / 1,650 | 700 | 38 |
| Group 6 | 4,000 | 2,700 / 1,990 / 1,920 | 750 | 55 |
| Group 7 | 4,500 | 2,700 / 1,990 / 1,960 | 800 | 58 |
| Group 8 | 6,000 | 3,000 / 2,300 / 2,270 | 900 | 70 |
| Group 9 | 7,000 | 3,200 / 2,460 / 2,430 | 1,000 | 83 |
| Group 10 | 8,000 | 3,200 / 2,620 / 2,590 | 1,100 | 94 |
| Group 11 | 9,000 | 3,200 / 2,770 / 2,740 | 1,200 | 107 |
