SUNRUI’s user-friendly design allows for one-button operation; however, several checks must be completed prior to operation. Below, we will outline the inspection points for each component in sequence.
Electro Chamber Unit (ECU)
As the core component of the ballast water treatment system, several key checks should be performed on the ECU:
- Open the inlet and outlet butterfly valves of the electrolysis unit to ensure reliability during maintenance.
- Close the residual discharge valve to prevent corrosion when the ballast water system is not in use.
- Open the cooling water inlet and outlet valves; the electrolysis process generates high temperatures and the system will shut down to protect the ECU if temperatures exceed safe limits.
- Close the bypass valve and discharge valves (RV2, RV4, RV5, and RV6).
Power Distribution Equipment (PDE)
Before starting large equipment, a load inquiry function is typically set. The PDE must be energized, which requires starting the generator and supplying power from the control room.
- Open the control cabinet door and switch on the main power.
- Set the selection switch on the front of the control cabinet to “Remote Control” to enable remote startup.
- Note that the remote control system defaults to CCR controlling HMI and PDE controlling HMI. Some switches may be located inside the control panel, while others are accessible externally with a key.
Control PC (CPC)
The XP operating system is known for its stability and is utilized to ensure smooth operation.
- Press the power button to turn on the computer.
- The system will boot automatically, and the human-machine interface will initiate.
- Any alarms must be resolved before proceeding with operations.
TRO Sensor Unit (TSU)
This patented American technology is essential for ballast water treatment systems. It’s hoped that SUNRUI will develop an alternative product soon.
- Verify the control panel of the residual chlorine detector is functioning and set to remote control by pressing F1.
- Check the liquid levels and expiration dates of the reagents—one must be replaced monthly and the other annually. Adjust the monthly reagent amount based on usage to save costs.
- Inspect the connecting hoses for air; ensure all air is purged to avoid inaccurate readings and false alarms.
- Fully open the sampling valves, with T1 and T2 open and T3 closed.
Auto Neutralization Unit (ANU)
If ballast water is retained for an extended period, hypochlorous acid will naturally decompose to comply with discharge regulations. For shorter voyages, neutralization is essential before discharge.
- Ensure the control panel is set to remote control for automatic activation during discharge.
- Confirm the dosing pump is set to automatic.
- Verify that all valves are in the open position.
- Prepare the appropriate amount of neutralizing agent according to personal experience and manufacturer’s guidelines.
Flow Meter Unit (FMU)
There are five flow meters, with two for the ballast mainline and one for the discharge line. The ECU has two additional meters for measuring seawater flow into the electrolysis chamber.
- Check the display data; flow should be near zero when the ballast water system is inactive. This is crucial for troubleshooting later.
- If the ECU’s flow meter shows incorrect data at startup, the ballast water treatment system cannot be initiated. Detailed fault diagnosis will follow.
Fresh Water Temperature Sensor (FTS)
Compare screen data with engine room temperatures to identify anomalies, as incorrect readings can directly affect the efficiency of the electrolysis unit.
- Inspect the sensor for external anomalies.
- Check for loose wiring connections.
Conductivity Sensor Unit (SCU)
This sensor measures seawater conductivity to determine chlorine ion concentration.
- Verify normal display functionality.
- Inspect the external connection flange for leaks.
- Ensure wiring is secure.
Gas Detector Sensor (GDS)
This sensor measures hydrogen gas concentration during electrolysis. High concentrations can trigger system shutdown due to explosion risks.
- Check the status of the hydrogen probe on the control panel—green indicates normal.
- Verify external connections for looseness.
- Regularly calibrate the sensor.
T-Strainer
The T-strainer filters foreign substances and large marine microorganisms from ballast water.
- Check for sediment accumulation.
- Ensure the pressure gauge functions correctly to determine when cleaning is necessary based on pressure differentials.
Heater Exchange Unit (HEU)
The heater is typically used in cold weather to enhance electrolysis efficiency by heating the seawater to an appropriate temperature.
- Inspect the heater for leaks.
- Verify the proper functioning of temperature and pressure gauges.