Working Principle Of Boiler In Ship

October 30, 2023 Post a Comment

Working principle of boiler 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.

Why are boilers used in ships?

Main propulsion boilers provide steam for propulsion turbines on a ship, propelling the ship through water by allowing for gear reduction, shafting and propeller movement.

Which type of boiler is used in ship?

Composite Boiler. Another most common type of boiler found on ships is composite boilers, where the exhaust heat of the main engines or generator engine is used to heat water or generate steam. Technically, the composite boiler is an integration of the exhaust gas boiler and the oil-fired boiler.

What is the working principle of water tube boiler?

How it Works. Burning gasses travel through the heat exchange passes of the boiler, through the large open combustion chamber and back through the narrower paths of tubes. These gases heat the water inside the tubes. As water circulates in the tubes from the lower mud drum, up to the steam drum.

What is purpose of boiler?

Boilers are used to produce steam. The generation part of a steam system uses a boiler to add energy to a feedwater supply to generate steam. The energy is released from the combustion of fossil fuels or from process waste heat.

What are the 3 types of boilers?

There are three main types of boiler: combi, heat only and system. Heat only boilers (aka conventional or regular) work with a cylinder in the airing cupboard. System boilers are often found in modern homes with an 'unvented' hot water cylinder (but they can work with a vented cylinder also).

What are the 2 types of boiler?

There are mainly two types of boiler – water tube boiler and fire tube boiler. In fire tube boiler, there are numbers of tubes through which hot gases are passed and water surrounds these tubes.

Which material is used in boiler?

Raw materials used for manufacturing of boiler are plates, tubes, pipes, pipe fittings, valves etc. Different materials like carbon steel, creep resistance alloy steels, stainless steels etc. are used for this purpose. Those raw materials are also certified by Boiler Directorate during manufacturing process.

What are the two classification of boiler?

Two primary types of boilers include Fire- tube and Water- tube boilers. In a Fire-tube boiler, hot gases of combustion flow through a series of tubes surrounded by water.

How does a boiler flow water?

Water is usually pumped into the tube/piping system at the bottom, and the steam is drawn off at the top. Water enters the bottom of this tube/piping at a high pressure and high velocity. In some specialized boilers, the water velocity can be as high as 100 m/s or more.

What is economizer in boiler?

Economizers are heat exchangers that transfer the heat in the flue gas to another medium‚ generally the boiler feed-water‚ although other streams are sometimes used such as make-up water. There are 2 types of economizers: non-condensing and condensing.

Why water tube boiler is used?

Advantages of water-tube boilers: They have a small water content, and therefore respond rapidly to load change and heat input. The small diameter tubes and steam drum mean that much higher steam pressures can be tolerated, and up to 160 bar may be used in power stations.

What is boiler and types?

A boiler is a steel pressure vessel in which water under pressure is converted into steam by the application of combustion. In other words, it is simply a heat exchanger which uses radiant heat and hot flue gases, liberated from burning fuel, to generate steam and hot water for heating and processing loads.

What is called boiler?

boiler, also called Steam Generator, apparatus designed to convert a liquid to vapour. In a conventional steam power plant, a boiler consists of a furnace in which fuel is burned, surfaces to transmit heat from the combustion products to the water, and a space where steam can form and collect.

What fuel is used in boilers?

The primary boiler fuels are coal, oil, and gas. Oil and gas involve the simplest controls, since they can be measured easily and flow is regulated by a control valve in the fuel line.

What is boiler example?

A boiler having only one fire tube or water tube is called a single tube boiler. The boiler having two or more, fire or water tubes is called multi tube boiler. Examples Single tube boiler: Cornish boiler, Vertical boiler. Multi-tube boiler: Lancashire boiler, Locomotive boiler, Babcock and Wilcox boiler.

What are the 2 main areas of boiler safety?

Boiler safety can be divided into two main areas: Boiler Safety System and Instruments. Marine Boiler Operational Safety.

What is the use of steam in ship?

Steam is also used in ships to cater to other heating requirements, some of which are listed below: Used as a heat exchange medium in Heavy Fuel Oil purifiers, Light Diesel Oil purifiers, and Lube Oil purifiers. Steam is used as a heating medium in booster modules. To pre-heat the main engine jacket cooling water.

Which tube is used in boiler?

Boiler Tubes are metal tubes located inside of boilers that heat water in order to produce steam. There are two major types of tube boilers: water-tube boilers and fire-tube boilers. In water-tube boilers, water circulates inside the tubes and is heated externally by hot gases generated by the furnace.

Which oil is used in boiler?

fuel oil, also called furnace oil, fuel consisting mainly of residues from crude-oil distillation. It is used primarily for steam boilers in power plants, aboard ships, and in industrial plants. Commercial fuel oils usually are blended with other petroleum fractions to produce the desired viscosity and flash point.