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Lloyd’s Register – Activity 4
Scrubbers – Closing the loopDevelopment of Generic Chemical & Waste Guidelines
Andy Wright16 October 2018
Activity 4 – Generic Chemical & Waste Guidelines
Development of a set of guidelines generally applicable to closed loop scrubber systems
using caustic soda (NaOH) as the neutralising agent
Basis - Lloyd’s Register’s:
● General involvement with scrubbers
● Direct interface with Stena Britannica & Stena Hollandica
● Overall process Risk Assessment with Stena Line - Hoek
Final product: Template for any user which they then develop up as their Process
Instructions by covering the details of the particular ship, system & port interfaces
Lloyd's Register 2
Ship’s SMS under
ISM Code - SOLAS
System Inflows & Outflows: Consumables Used / Products Generated
Lloyd's Register 3
Harwich
Port
per
imet
er
Hoek van Holland
Consumables On:Caustic Soda
Treatment system
dosing materials
Test gas
Products Off:Treatment system
residues
Waste materials
OnboardReceipt
Storage / Handling / Use
Despatch
Ports X, Y, Z …. Other ship types & trades / Retrofit or Newbuild Ports A, B, C ……
SPECIFIC EXAMPLES TRANSLATED TO GENERAL APPLICATION
Consumables: Caustic Soda – NaOH – 50% solution
Lloyd's Register 4
NaOHSodium bisulphite – NaHSO3Sodium sulphite - Na2SO3Sodium sulphate - NaSO4+ Sulphuric acid - H2SO4
Caustic Soda Supply
Lloyd's Register 5
Bulk Delivery(3 x ~30 t every two weeks)
Delivery arrangements: Timing & Access
Drain or push down / Pump up
Driver / Ship Staff Ship Internal Comms
Documentation – Q & Q
Tank Capacity / Vents
Procedures – Check Sheets
Caustic Soda – Loading Station
Lloyd's Register 6
Segregation / Marking
Safety Gear
Containment / Clean-upUsual wash-downSpills
Caustic Soda – Use
Lloyd's Register 7
Storage (20-50˚C)Dosing system
Pumps and controlsPiping
Wash-water circulating systemReactor towerProcess tanks
Dockings:PreparationShipyard awareness & care
Scrubbers – Closed Loop Bleed-off Treatment
Lloyd's Register 8
Control of water discharged to sea:pHOil content (as PAHphe)Turbidity
Management of:systemchemical dosing (NaOH + others)
Onboard testingTreatment control adjustments
Maintenance & service
Scrubbers – Treatment System Residues & Other Wastes
Lloyd's Register 9
Nature and hazard rating
Onboard containment and storage(2 – 3 Residue skips / 2 days)
Discharge arrangements
Duly licenced receivers
Disposal of other waste materialsChemical contaminated wipes, spill containment pads, etc.
Scrubber – Bleed-off Treatment Chemicals + Gases
Lloyd's Register 10
Hazard status
Free standing tanksProtectionFilling and managementPump and piping systemsEnd use points
Drummed productReceiptStorageHandlingDispensing
SO2/CO2 span gas
Scrubbers – Safety Action Ashore / Action Onboard
11
Awareness – Safety Training & Updates
Direct contact (Engineers – ER Crew)
Contractors / Riding Crew
Others onboard (Deck / Hotel)
Safety ownership – Ashore / Onboard
Operation and maintenance procedures
Scrubber & associated systems
Safety equipment – PPE, fixed & portable
External Support
Planning incident responses
Response drills within overall programmeProtective clothing & gloves
Eye & face protection
Emergency wash
Experience
Lloyd's Register 12
Over 4 ship.years of operating experience with NaOH as the neutralising agent since the completion of the respective commissioning phases
Chemical receipt and waste delivery evolved into standard operating procedures
Scrubber related aspects integrated into routine onboard operations
No spills or other incidents
Lloyd's Register 13
Thank youLloyd’s Register
Global Technology Centre, Southampton UK:
Project Manager:
Reddy Devalapalli 44(0) 33041 40 217 [email protected]
Marine Consultancy - Technical Support:
Yildiz Williams 44(0) 33041 40 088 [email protected]
Andy Wright 44(0) 33041 40 573 [email protected]
