Marine Aux Boiler

Описание: "Boilers and Steam Systems"

General Description:-

The steam generating plant consists of two auxiliary boilers and one exhaust
gas economises Steam is required at sea for fuel, domestic water and cargo
slop tank heating purposes. In port steam is used additionally for driving the
power turbines of the cargo pumps and No. 1 water ballast pump. The steam
demand of the plant, in port, is served by the boilers. At sea, steam demand is
met by circulating boiler water from one of the auxiliary boilers through the
exhaust gas economiser, by one of the boiler water circulating pumps. The
auxiliary boiler acts as a receiver for the steam generated by the economiser.
The economiser is arranged in the main engine exhaust gas uptake to take
waste heat from the main engine exhaust. An auxiliary boiler may be required
at sea in low temperature areas, as well as reduced power operation of the main
engine, such as during manoeuvring or slow steaming on passage when there
will be insufficient waste heat to generate the required steam.

*Operating Procedures:-

Procedure for Preparing the Boiler for Service
The following steps should be taken before attempting to flash up the boiler.
a)  All foreign materials must be removed from internal pressure parts.
b)  All gas side-heating surfaces must be clean and all refractory be in good condition.
c)  The furnace bottom and the burner wind box must been cleaned of oil and other debris.
d)  All personnel not involved must remain clear of the boiler.
e)  All manhole covers must be securely tightened.
f)   Inspect safety valves and ensure that gags have been removed and easing levers are in good condition.
g)  Open root valves for all instruments and controls connected to the boiler and check that they work as intended.
h) Open the vent valve of the steam drum.
i) Open all pressure gauge valves and check to ensure that all valves on the pressure gauge piping are open.
j) Check and close all blow-off valves and drain valves.
k) Fill the boiler until water level appears 25 to 50mm high in the gauge glasses.
Allow for swell in level after firing.
1) Check the operation of gauge glasses.
Remote reading instruments will not work correctly until the boiler is under pressure and so they must not be relied upon.



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