Scrubbers Closing the loop Development of Generic Chemical & Waste Guidelines Lloyd s Register Activity 4

Transcription

1 Scrubbers Closing the loop Development of Generic Chemical & Waste Guidelines Lloyd s Register Activity 4 Andy Wright 16 October 2018

2 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 Ship s SMS under ISM Code - SOLAS Lloyd's Register 2

3 System Inflows & Outflows: Consumables Used / Products Generated SPECIFIC EXAMPLES TRANSLATED TO GENERAL APPLICATION Port perimeter Harwich Onboard Receipt Storage / Handling / Use Despatch Hoek van Holland Consumables On: Caustic Soda Treatment system dosing materials Test gas Products Off: Treatment system residues Waste materials Ports X, Y, Z. Other ship types & trades / Retrofit or Newbuild Ports A, B, C Lloyd's Register 3

4 Consumables: Caustic Soda NaOH 50% solution NaOH Sodium bisulphite NaHSO 3 Sodium sulphite - Na 2 SO 3 Sodium sulphate - NaSO 4 + Sulphuric acid - H 2 SO 4 Lloyd's Register 4

5 Caustic Soda Supply 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 Lloyd's Register 5

6 Caustic Soda Loading Station Segregation / Marking Safety Gear Containment / Clean-up Usual wash-down Spills Lloyd's Register 6

7 Caustic Soda Use Storage (20-50 C) Dosing system Pumps and controls Piping Wash-water circulating system Reactor tower Process tanks Dockings: Preparation Shipyard awareness & care Lloyd's Register 7

8 Scrubbers Closed Loop Bleed-off Treatment Control of water discharged to sea: ph Oil content (as PAH phe ) Turbidity Management of: system chemical dosing (NaOH + others) Onboard testing Treatment control adjustments Maintenance & service Lloyd's Register 8

9 Scrubbers Treatment System Residues & Other Wastes Nature and hazard rating Onboard containment and storage (2 3 Residue skips / 2 days) Discharge arrangements Duly licenced receivers Disposal of other waste materials Chemical contaminated wipes, spill containment pads, etc. Lloyd's Register 9

10 Scrubber Bleed-off Treatment Chemicals + Gases Hazard status Free standing tanks Protection Filling and management Pump and piping systems End use points Drummed product Receipt Storage Handling Dispensing SO 2 /CO 2 span gas Lloyd's Register 10

11 Scrubbers Safety Action Ashore / Action Onboard 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 programme Protective clothing & gloves Eye & face protection Emergency wash 11

12 Experience 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 12

13 Thank you Lloyd s Register Global Technology Centre, Southampton UK: Project Manager: Reddy Devalapalli 44(0) Reddy.devalapalli@lr.org Marine Consultancy - Technical Support: Yildiz Williams 44(0) Yildiz.williams@lr.org Andy Wright 44(0) Andy.wright@lr.org Lloyd's Register 13