Marine

It is almost a common phenomenon on ship to experience difficulties while starting the boiler plant onboard ships. There can be several reasons for the failure in staring of a boiler. In this presentation let us look at the most common reasons for "Boiler not Starting".. 1) Burner Fuel Inlet Valve is in close position: The fuel line for boiler’s burner consists of several valves located at fuel tank, pumps suction, discharge valve, or valve before the boiler burner. Any of these can be in closed position resulting in starvation of fuel. 2)  Choked/Clogged line filter at the inlet of the fuel line for burner: If the system runs in heavy oil then there are chances of filters in the line getting choke. To avoid this, boiler system are normally built for changeover f...

While human operators are sometimes required for boiler operation, and this provides some level of awareness and protection, safety equipment is designed to be a final safeguard against catastrophe. When water is boiled to steam, it expands 1400 times in size, which is perfectly fine in the controlled environment of a properly functioning boiler system. However, if there is a malfunction and a large quantity of high pressure/high temperature water is released to the atmosphere, the expansion of that water to steam results in catastrophic damages. Safety equipment on boilers provides a safeguard against dangerous conditions that could arise. Boilers and other pressure equipment are only designed to operate at maximum pressure and temperature, so exceeding the design conditions may res...

The safety devices found on the boiler include the following: Safety valve. Low or high water level alarm. Too low water level alarm and shut down. Water level indicators. Pressure gauge. Water level indicators. Flame failure alarm. Smoke density alarm. Low pressure fuel oil alarm. Low or high fuel oil temperature alarm. Easing gear arrangement. Air vent. Force draught fan stop alarm. Low or high steam pressure alarm.

Boiler maintenance schedule Steam boilers or Thermal oil boilers are integral part of the engine room of any kind of ship be it a merchant vessel, military or passenger ship for the kind of role they play in the daily tax of the ship while at sea, at port or at anchor. Therefore it is very necessary to ensure that the boiler daily, weekly, monthly and annual checks and tests are carried out to keep the boiler plant very efficient, safe to operate and use. Below are the various checks carried out at specific intervals on the boiler: Every Day Check boiler steam pressure and water level. Check whether feedwater control system is operational. Check boiler water condition; if necessary, blow down the boiler. Make necessary countermeasures with regard to the feed and b...

Despite the best of efforts pistons do have a specific lifetime, and one day it has to be replace no matter how much well maintained it is. In this article, I will tell you the general steps on how to go about changing the huge piston of the main propulsion plant of the ship. Changing the Piston The spare piston always kept properly secured and lots of grease is applied to it to prevent against any kind of corrosion. Hence whenever it is required to be used as a substitute for the old piston which has to be removed, it is first cleaned up thoroughly to remove all that grease and the possible dust and dirt that have covered it up during its lonely stay at some bulkhead. It is necessary to gauge the liner and the piston to check whether they are compatible with each other. This is ...