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Marine Exhaust emissions - Exhaust gases from engines and boilers
Ships exhaust emissions control :
Exhaust gases from engines and boilers contain atmospheric pollutants
which are principally nitrogen oxides (NOX), sulphur oxides (SOX),
carbon oxides and unburnt hydrocarbon particulates. These various
pollutants contribute to smog (smoke+fog) and acid rain, and carbon oxides
contribute to the greenhouse effect, which is increasing global
The IMO Marine Environment Protection Committee is considering
ways to reduce the pollutants in exhaust emissions.
The SOX content of emission may be reduced by either a reduction of
the sulphur content in fuels or an exhaust gas treatment system. New
engine technology may reduce NOX formation and thus emissions, while
carbon oxides can be reduced by good plant maintenance.
Selective Catalytic Reduction Systems are in use on some vessels, which
are said to reduce NOX emissions by 90 per cent and carbon oxides by
80 per cent. The equipment has been successfully operated on new
buildings and more recently as a retrofit on existing ships.
Major research initiatives are underway by engine builders, and
classification societies, in cooperation with shipowners, in order to obtain
data regarding achievable targets and suitable methods of measurement.
This data will enable IMO and National Authorities to develop realistic
legislation with which owners can readily comply on new and existing
You should be aware that under various regulations applicable to the area your vessel is in, it may be an offence to emit dark smoke. The Master should therefore request appropriate detailed information from the local agent concerning the area emission regulations and pass the information to the Chief Engineer.
Emissions of smoke, soot and exhaust gases such as COx, NOx and SOx (Carbon, nitrogen and sulphur) is minimised by controlled running, systematic maintenance and inspection routines of machinery, boilers and funnel. The emissions of exhaust gases contribute to pollution and environmental problems such as acidification and global warming. All to focus on control and reduction of the emission of these harmful gases.
Some of the ships are equipped with funnel filters to prevent large emissions from occurring. Special care shall be exercised during port stays and when starting main and auxiliary engines and lighting boilers.
Fuel oil centrifuging for marine use - purifiers use
Marine fuel oil Microbiological infestation
Mixing of heavy fuel oil and marine diesel oil using blenders
Fuel oils treatment for marine use -The refining process for crude oil
Fuel oil separation process
Marine fuel oil treatment - use of filters and strainers
Lubricating oils treatment for marine use
Lubricating oil centrifuging for marine use
Marine machineries - Useful tags
Marine diesel engines ||Steam generating plant ||Air conditioning system ||Compressed air ||Marine batteries ||Cargo refrigeration ||Centrifugal pump ||Various coolers ||Emergency power supply ||Exhaust gas heat exchangers ||Feed system ||Feed extraction pump ||
Flow measurement || Four stroke engines || Fuel injector || Fuel oil system || Fuel oil treatment ||Gearboxes || Governor ||
Marine incinerator ||
Lub oil filters ||
MAN B&W engine ||
Marine condensers ||
Oily water separator ||
Overspeed protection devices ||
Piston & piston rings ||
Crankshaft deflection ||
Marine pumps ||
Various refrigerants ||
Sewage treatment plant ||
Starting air system ||
Steam turbines ||
Steering gear ||
Sulzer engine ||
Turbine gearing ||
Two stroke engines ||
UMS operations ||
Drydocking & major repairs ||
Critical machinery ||
Deck machineries & cargo gears
|| Control and instrumentation
||Engine room safety ||
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