ECO SYSTEM
NTGT
Nitrogen Generator
Technology applied to stably transport ships, equipment that stabilizes fuel and prevents explosions
SYSTEM
System Description
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1
Filter (U, P, S Grade)
- When an air compressor supplies air to an air filter which is in a nitrogen generator panel, oil and solid particles in air are filtered.
- Seperated oil and moisture are automatically discharged by a filter drain unit.
- A diffrential pressure guage hepls checking a replacement period.
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2
Heater
- Optimal temperature of air is essential point to produce fine quality nitrogen. In the optimal condition, moisture and liquid oil are evaporated an also, volume of nitrogen is increased.
- Temperature is consistently monitored by a heat controller and kept in steady level.
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3
Membrane
- When compressed air flows into a membrane, various air components, such as oxygen, carbon dioxide and the other gasses are passed through hollow fibers in the membrane.
- Oxygen is rapidly released outside with its high diffusion rate via the hollow fibers. But nitrogen has a low diffusion rate, so it is not filtered and flows to a next stage.
- The nitrogen capacity is related to the flow rate, temperature and pressure of the compressor.
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4
Automatic Control
- A control panel keeps monitoring concentration of oxygen and flow of nitrogen which is controlled by automatic control valve.
- If the concentration of oxygen is over than 3.5%, an operator receives a system alarm. And if the oxygen level is over than 4%, the system is automatically shut-down.
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5
Charge / Discharge
- Nitrogen is charged to a buffer tank up to 10 bar. When it is lower than 5 bar, nitrogen is automatically recharged to the buffer tank. (Adjustable)
- If quality of nitrogen is not matched with a target level of the system, the nitrogen is automatically discharged through an exhaust line.
- A diffrential pressure guage hepls checking a replacement period.
Main Monitoring
- N2 purity air inlet pressure
- N2 tank pressure
- N2 flow rate
Gas Detector Monitoring
- Sensor value audio & visual alarm
P&ID Monitoring
- N2 purity / flow rate / air inlet / N2 tank pressure oxygen content temperature, dew point
DESCRIPTION
Control section
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PLC, HMI, Buzzer, Alarm lamp,
Emergency stop button
Membrane & Process section
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Membrane module, Oxygen sensor,
Pressure transmitter -
Temperature sensor, Dew point meter,
Air Filter, Heater - Control Valve, 3-Way Valve