The auxiliary steam boiler on your oil platform supply vessel is equipped with soot blowers for maintaining heat transfer efficiency. On which of the following auxiliary boiler types would soot blowers most likely be fitted?
• Difference between fire-tube and water-tube boilers, especially gas flow path vs water/steam path • Where soot forms and why soot blowers are needed to clean gas-side heating surfaces • Typical size, pressure, and fuel/heat source of auxiliary boilers on offshore/oilfield supply vessels
• In which boiler design do hot combustion gases pass through tubes and deposit soot on tube surfaces that are hard to reach manually? • Which boiler type is normally used for higher pressures/outputs and has extensive gas-side heating surface that benefits most from automatic soot blowing? • Which option(s) would NOT normally have combustion gas passages where soot could accumulate?
• Identify which boiler types actually have combustion gas passages and fired furnaces (eliminate those that don’t). • Consider which design is more common as an auxiliary propulsion/ship service steam boiler on modern vessels requiring regular soot blowing. • Think about which boiler types are usually small, low-output, or electrically heated, and therefore unlikely to use soot blowers.
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