TDHI - Model TD-5100 ECA - Scrubber Wash Water Overboard Discharge Monitor
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, which has 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.
The TD-5100 ECA monitors:
- pH (optional)
By rules 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 into question. With our history of marinized, rugged fluorescence analyzers and monitors, we designed and tested a system specifically to answer the MARPOL requirements.
The TD-5100 ECA 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. An optional pH probe can be added to the system. The TD-5100 ECA is rugged, marinized, and uses the same user-dictated design philosophy of every Turner Designs Hydrocarbon Instruments monitor.
Performance: All measurements are made in accordance with Annex 9, MEPC. 184(59)
Measurements and Ranges:
- Operational Principle (PAH and Turbidity): UV Fluorescence + UV absorption + Near IR light scatter
- PAH: 3 - 5000 ug/L as PAHphe
- Turbidity: 0 - 200 NTU
- Sample Water Temp: 0 °C - 50 °C (32 °F - 122 °F) +/-1% accuracy
- pH: 2.5 - 11 (external probe)
- Calibration: With safe, non-toxic water soluble PAHphe surrogates traceable to factory standards
- Calibration Frequency: Annually
- Drift: <10% 12 months referenced against calibration standards
- PAH Stability vs Increased Turbidity: Stable within +/- 10% over normal turbidity range
- Response Time: HOME screen user settable update: 3, 10, 20, or 30 seconds
- Onboard Validation: With safe, non-toxic water soluble PAHphe surrogates traceable to factory standards
- Security: Multi level password protected user interface
- Electronics Cabinet: 316 Stainless Steel IP 66
- Envelope Dimensions: Height 648 mm x Width 671 mm x Depth 269 mm ( 25 1/2' x 26 3/8' x 10 1/2')
- Weight: [34 kg] 75 lbs
- Power Requirements: 115 VAC or 230 VAC Specified at time of order
- Wiring (customer supplied): Power and Alarms 14 AWG [2.08 mm2], Analog Signal 18 AWG [.82 mm2]
- Inlet Plumbing Requirements: 3/8' MNPT [9.5 mm] or EN 10226 Rs 3/8'
- Outlet Plumbing Requirements: 3/8' MNPT [9.5 mm] or EN 10226Rs 3/8'
Process / Sample Conditions:
- Inlet Sample Flowrate: .5 L/m - 2.0 L/m (.13 g/m - .5 g/m)
- Inlet/Outlet Sample Pressure: 34.5 - 689.5 kpag (5 - 100 psig)
- Sample Temperature: 0 - 50 °C (32 °F - 122 °F)
- Sample pH: pH 2.5 - 11
- Turbidity Range: 10 - 200 NTU
- Sample Water: Sea or fresh water, open or closed loop washwater
- Ambient Temperature: 0 - 45 °C (32 °F - 113 °F)
- Vibration, Shock, EMI: In accordance with MED, USCG and DNV GL Requirements
General Service Conditions:
- Alarms: Communication failure, Lamp failure, Temperature: enclosure, Temperature: process, Real-time clock, System memory, Concentration alarms, Cleaning alarms
- Alarm Outputs: Relays 1 - 2, Configurable
- Communication: 4 - 20 mA standard, Ethernet and Modbus available on request
- Diagnostics: Events, relay status, alarm status, temperature (enclosure, process), optical measurements, firmware, datalog files
- Cell Condition Monitor: Determines when sample cell needs cleaning during clean water injection
- Sample Pump: Only if necessary for sample pressure <34.5 kpag (< 5 psig)
- Cleaning System: Ultrasonic: on timer or as needed
- Data Logger: E09 Data Logger with data transfer via USB Flash Drive
- ISO Certified: 9001: 2008 Quality System
- Marine exhaust gas cleaning systems
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