Marine Exhaust Gas Scrubbing systems for Heavy Fuel Oil burning ships are
becoming main stream with various configurations including open loop, closed
loop and hybrid systems. Oxides of Sulfur and Nitrogen along with particulates
and unburned hydrocarbons are removed into the very high volumes of wash water
sprayed into the exhaust scrubber system. The wash water can be a combination
of seawater with a natural buffer capacity and/or fresh water with buffer added to
neutralize the acids formed when sulfur contacts the water. The contaminated wash
water is then discharged directly to the sea or contained and treated before
discharge depending on the system and the specific rules that apply to that
situation. With the exhaust contaminants then contained in the water phase, the
environment must be protected from abnormally high discharges.
By rule as dictated by MARPOL Annex VI, MEPC. 184(59), Poly Aromatic
Hydrocarbons (PAH), Turbidity, pH, and Temperature must be monitored at all times
while discharging scrubber wash water to the sea. However, standard off the shelf
sensors have proven less than adequate for rugged marine service in contact with
the wash water and their ability to pass marine certification has come to question.
With our history of marinized, rugged, built for purpose fluorescence analyzers and
monitors for bilge water, drilling rig deck drains, steam condensate, and overboard
oilfield produced water, we designed and tested a system specifically to answer the
MARPOL requirements for PAH, Turbidity, Temperature with external pH probe.
The Wash Water Discharge Monitor TD-5100 is ready for January 1, 2015
when the low sulfur fuel rule goes into effect. The pain of not knowing if your
monitoring system is really working is now off the table. Our new system provides
PAH, Turbidity and Temperature with input for pH all in one monitor. It covers the
entire range of concentrations, is self-cleaning, and operators can validate
operation for Port State Control inspectors or management onboard at any time.
The TD-5100 is rugged, marinized and uses the same user dictated design
philosophy of every Turner Designs Hydrocarbon Instruments’ monitor.
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