Exhaust Gas Boiler · Boilers
The Alfa Laval S.p.A. Aalborg-XS-TC7A-7bar is a marine exhaust gas boiler in the Aalborg XS product family. It is installed in the exhaust-gas stream of a diesel engine to recover heat and transfer it into the vessel's boiler-water and steam system. The recovered energy can reduce the amount of fuel that would otherwise be burned in an auxiliary boiler while the engine is operating. Its thermal output varies with engine load, exhaust temperature, gas flow and the condition of the heat-transfer surfaces. The 7bar suffix identifies the pressure-labelled version of Aalborg-XS-TC7A; the exact design pressure and operating limits must be verified against the manufacturer documentation. Safe operation depends on adequate water circulation, effective removal of gas-side deposits and correct boiler-water treatment.
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What our service work and the manufacturer documentation say about keeping this model running.
Inspect accessible heating surfaces for soot, oil residue, corrosion and overheating and verify effective cleaning arrangements. Check water circulation, pumps, valves and piping for correct operation and freedom from restriction. Examine tubes, headers or drums, casing, supports and expansion joints for leakage, cracking and corrosion. Review boiler-water chemistry, blowdown practice and make-up-water consumption. Verify relevant safety valves, pressure and temperature indication, alarms and protective functions in accordance with the vessel's maintenance system. Refer to the manufacturer documentation for exact inspection intervals, pressure tests and acceptance limits.
Typical onboard spares include gaskets and sealing materials, valve packing and service kits, circulation-pump parts where applicable, and common pressure and temperature instrumentation spares. Keep replacement parts or consumables for soot-cleaning equipment where fitted. Any tube-plugging or pressure-part repair materials should only be carried and used under an approved manufacturer and class procedure.
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