Exhaust Gas Economizer
medium
Waste heat recovery boilers utilizing main engine exhaust gas
Known Models (3)
Aalborg Industries (Alfa Laval) AV-6N
2-8 t/h steam @ 7 bar
· Exhaust Gas → Steam
· Finned Tube EGE
medium: Exhaust Gas → Steam
type: Finned Tube EGE
Common Failures:
- • Soot fire (most critical)
- • Tube erosion from soot blowing
- • Water tube leakage
- • Casing corrosion
Service: SOOT FIRE RISK — monitor exhaust gas temperature differential. Soot blow regularly. Annual tube inspection. CO₂ smothering system mandatory.
Spares: Aalborg Industries (Alfa Laval): Brennerdüsen-Satz, Photoauge und Dichtungen an Bord vorhalten. Lead time: 3-8 Wochen für Rohre.
Aalborg Industries (Alfa Laval) KBE
3-6 t/h steam
· Exhaust Gas + Oil → Steam
· Composite EGE
medium: Exhaust Gas + Oil → Steam
type: Composite EGE
Common Failures:
- • Soot fire in EG section
- • Burner malfunction in oil section
- • Tube leakage
- • Water level control failure
Service: Dual heat source — EG section operates at sea, oil section in port. Soot blowing critical. Water treatment essential.
Spares: Aalborg Industries (Alfa Laval): Brennerdüsen-Satz, Photoauge und Dichtungen an Bord vorhalten. Lead time: 3-8 Wochen für Rohre.
Kangrim KEH Series
2-10 t/h steam
· Exhaust Gas → Steam
· Finned Tube EGE
medium: Exhaust Gas → Steam
type: Finned Tube EGE
Common Failures:
- • Soot accumulation and fire risk
- • Tube erosion
- • Casing cracking from thermal stress
Service: Common on HHI/DSME/SHI-built vessels. Same soot fire prevention as Aalborg. Annual tube thickness measurement.
Spares: Kangrim: Brennerdüsen-Satz, Photoauge und Dichtungen an Bord vorhalten. Lead time: 3-8 Wochen für Rohre.