Exhaust Gas Boiler · Boilers
The Alfa Laval S.p.A. Aalborg-XW-TG-5-16bar is a forced-circulation water-tube exhaust gas economizer in the Aalborg XW-TG waste-heat-recovery family. It is installed downstream of a large diesel engine and recovers exhaust energy that would otherwise be discharged through the funnel. The XW-TG concept is derived from the Aalborg XW design with gilled water tubes and is intended for installations that generate superheated steam for a steam-turbine-driven generator. The unit therefore forms part of a wider waste-heat-recovery plant that includes circulation equipment, steam separation and the associated control and protection systems. The 16bar suffix identifies this pressure-labelled variant of Aalborg-XW-TG-5; exact pressure, temperature and steam conditions must be taken from the manufacturer documentation. Because the unit works with high heat-recovery rates, cleanliness, stable forced circulation and correct control of steam conditions are particularly important.
Every value below comes from the manufacturer datasheet or class-society record on file for this model.
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What our service work and the manufacturer documentation say about keeping this model running.
Inspect heating surfaces for soot, oil contamination and corrosion and trend exhaust-gas pressure drop where available. Verify circulation-pump redundancy, valve alignment and all relevant low-flow or temperature protection. Examine accessible tubes, headers, casing, supports and expansion arrangements for leakage or fatigue damage. Review steam and water chemistry records and investigate any abnormal make-up-water demand. Test relevant pressure, temperature, flow and steam-condition instrumentation and alarms. Survey work should also consider the interfaces with the steam drum, superheated-steam system and turbo-generator. Use manufacturer documentation for exact limits and test procedures.
Carry circulation-pump service parts, valve and actuator kits, suitable gaskets and sealing materials, and critical pressure, temperature and flow instrumentation spares. Keep wear parts and consumables for the soot-cleaning system. For installations where downtime of the waste-heat plant affects electrical generation, the spare strategy should also cover critical control components and any manufacturer-approved tube-repair materials.
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