What is boiler system in ship?
Boiler is a pressure vessel used on ships in which the water is heated to evaporate and generate the steam and the unit is so arranged that the generated steam accumulated in it. The two main types are water tube and fire tube.
How does a package boiler work?
How does it Work? Package boilers can be water-tube or fire-tube. They use fuel in the form of gas or liquid. By igniting this fuel in the combustion chamber, they create explosion inside the boiler and remain in this state with the help of a fan that forces air into the chamber and creates a tornado effect.
What are the main objectives of boiler controls?
The purpose of boiler control is to achieve safe operation, reliability and optimized performance with respect to load-change response, fuel cost and emissions.
What is oil fired boiler in ship?
General. An oil-fired steam boiler on board a ship is fed by returned condensed steam to replace the boiled off water as well as with stored feed (make-up) water to replace steam lost by consumption, leakage or blow down.
How do you maintain a boiler?
Boiler Maintenance Checklist
- Inspect and clean fireside surfaces.
- Inspect all burner refractory material.
- Inspect all manhole gaskets for leaks.
- Inspect and test all system valves.
- Inspect and test all safety valves.
- Clean and rebuild low water cut-off.
- Recalibrate all operating controls.
- Overhaul feed water pumps.
What is boiler control?
Commercial boilers typically have two or three controls: operating, limit, and sometimes a firing-rate control. Operating control. This device is the principal boiler control and is set at the desired operating pressure or temperature of the boiler. The hydronic boiler operating control is typically set to 180°.
What is combustion control in boiler?
The boiler combustion control system is designed to maintain a proper air/fuel mixture under varying load conditions and within safe limits. The system should provide nearly complete fuel combustion as efficiently as possible.
What are the types of boiler in ship?
5 Types of Marine Boilers
- The Water-tube Boiler.
- The Main Propulsion Boiler.
- The Auxiliary Boiler.
- The Waste Heat Boiler.
- The Composite Boiler.
How do you maintain a boiler on a ship?
Boiler Maintenance on Ships – Marine Engineering
- Check the boiler steam pressure and the water level.
- Check that the feed water control system is operational.
- Check the boiler water condition and make necessary countermeasures with regard to the feed and boiler water treatment.
How often we maintain the boiler on ship?
Inspection of furnace: The furnace should be inspected at least twice a 3 year. During this inspection, the following issues should be taken into consideration: Check for cracks at the refractory and that the furnace walls are free from excessive soot deposits.
What are the two types of boiler control system?
How to Control Different Types of Boilers
- Automatic on/off controls switch boiler on or off based on heat demand.
- High-fire/low-fire controls alter the level of the burners—which provide the heat input—to maintain a specific working pressure based on steam demand.
What is boiler master control?
Boilermaster. This controller accepts the firing rate demand signal from the Plant Master controller as the process variable. The output of boiler master provides the firing rate demand signal and operator applied bias to the fuel and air controllers for that specific boiler.
What is automatic boiler control?
By means of automatic combustion control it becomes easy to maintain a constant steam pressure. and uniform furnace draught and supply of air or fuel can be regulated to meet the changes in steam demand. The boiler operation becomes more flexible and better efficiency of combustion is. achieved.