The boiler manhole-lids are mounted from the inside of the boiler so that the boiler pressure will help to keep them tight. Hence the manholes have to be elliptical in shape to make it possible to take the lid out from the boiler. Boiler Questions and Answers
Firetube boilers are used for auxiliary purposes to provide smaller quantities of low-pressure steam on diesel engine powered ships.. Fire tube boilers working principle and operational procedure The firetube boiler is usually chosen for low-pressure steam production on vessels requiring steam for auxiliary purposes.
These are large diameter unheated i.e. external to the furnace, their purpose is to feed water from the steam drum to the water drum and bottom headers.
The salinity will rise rapidly since the salt remains in the boiler while the water boils off. Salt will son precipitate and accumulate on the bottom and also on the heating surface where it, just as boiler-scales, inhibit the heat transmission to the water and causes the metal to overheat and in worst case burst.
Air- it is the purpose of the register, swirler vanes and (vortice) plates, and quarl to supply the correct quantity of air for efficient combustion suitably agitated to allow proper mixing. The air is generally heated on larger plant to; prevent thermal shocking ; improve the combustion process
Combustion Training. What is a Boiler? A boiler is an enclosed vessel in which water is heated and circulated, either as hot water, steam, or superheated steam for the purpose of heating, powering, and/or producing electricity. The furnace of the boiler is where the fuel and air are introduced to combust; fuel/ air mixtures are normally introduced
Nov 12, 2019 · The steam can be used to drive turbines which produce electricity. Alternatively, the boiler can simply be used to heat water or other kinds of fluid. As it recycles some of the energy used, a waste heat boiler, or waste heat recovery boiler, can reduce the fossil fuel consumption and financial running costs of a system.
Boiler mountings are a set of safety device installed for the safe operation of a boiler. There are seven main mountings on a boiler shell; safety valve, steam stop valve, vent valve, pressure gauge, water level indicator, feed check valve and fusible plug.
Jul 10, 2019 · The purpose of the BMON class notation is therefore to provide guidance to crews in maintaining auxiliary boilers efficiently, and to help owners and ship managers reduce deficiencies, repair and maintenance costs, and the associated downtime.
The feed system completes the cycle between boiler and turbine to enable the exhausted steam to return to the boiler as feedwater. The arrangements for steam recovery from auxiliaries and ship services may form separate open or closed feed sysems or be a part of the main feed system. The two principle types of condenser are:
How an industrial boiler system works The heart of an industrial boiler system is a hot water or steam boiler operated with a certain kind of fuel. The boiler heats up or evaporates the water inside it, which is then transported to the consumers via pipe systems. In case of hot water the transport energy is generated by
Design of an industrial boiler At full capacity a boiler of this size converts 3 000 litres of fuel oil or a corresponding amount of natural gas to thermal or process heat every hour. This would be sufﬁcient to heat more than 2 000 houses. Because of the huge volume of water and the multi-stage lead-through of
As an indirect fired water heater cannot produce the heat itself due to the missing burner, it relies on an external heat source such as e. g. a boiler or solar collectors. These heat up the liquid in the heat exchanger coil which in turn heat up the water contained in the vessel.
Economizer is an accessory of boiler that recovers the waste heat from the flue gas blown out of the boiler.
Mar 14, 2013 · Purpose of the boiler drum is to collect steam from all the various tubes in a boiler, and send it to the turbine to spin the generator Asked in Steam Engines, Combustion Engines
Generally speaking, according to the purpose, the boiler can be divided into a power boiler and heating boiler. Power boilers include power station boilers, ship boilers, and locomotive boilers, which are used for power generation, ship power, and locomotive power.
Jan 02, 2018 · Hot well is a tank or reservoir in which condensed hot water is collected from different steam lines. It’s also called as Cascade tank. It’s an integral part of Boiler feed water system. Purposes: Collects condensed water. Supply feed water. Chemical treatment is done. Fresh water filling for feed system.
Exhaust Gas Boilers And Economisers Arrangement Auxiliary boilers on diesel main propulsion ships, other than tankers, are usually of composite form, enabling steam generation using oil firing or the exhaust gases from the diesel engine. With this arrangement the boiler acts as the heat exchanger and raises steam in its own drum.
This ultra high efficiency dual purpose boiler has an AFUE rating of 95% which provides 140k BTUs for space heating and comes with an optional domestic hot water capability that can provide 3.2 gal/minute at a 77° temperature rise.
Oct 24, 2013 · A Marine Steam boiler is one of those machinery that gets the ship going. A boiler is something, which though not required continuously in operating a ship, cannot be done away with. Moreover, it’s
Boilers sometimes prime when the ship passes from salt to fresh water or fresh water to salt. It has been suggested that in passing from salt to fresh water the cause is this : fresh water being lighter than salt, is upon its admission to the boiler more easily thrown about by the ebullition, and
What is a steam boiler? What are the uses of a steam boiler? What does the steam boiler compose of and how does it work? These are some of the questions whose basics are being tested in this quiz.
Oct 11, 2019 · Marine boilers used in ships today are mostly for auxiliary purposes in vessels that run on marine diesel engines or diesel electric propulsion. In case of ships using steam turbines (mostly found in high speed vessels used by navies), boilers are a part of the main propulsion system.
Function of condenser in a feed system for boiler and steam turbine The condenser is a heat exchanger which removes the latent heat from exhaust steam so that it condenses and can be pumped back into the boiler.
are encountered. It is the purpose of any boiler and pressure vessel inspection law and the rules and regulations based . 2 thereon to provide for and maintain safe
Economizer is an accessory of boiler that recovers the waste heat from the flue gas blown out of the boiler. Thus it actually "economizes" the operational cost or in other words, improves the
The feet are located below the boiler, usually under the front end of the sidewall header and water drum. There is a greased phosphor-bronze friction plate on which these feet will move. The planned maintenance system (PMS) requires lubricating the sliding feet every month. Some newer ships have permalube sliding feet which never require lubrication.
Boilers are part of a hydronic heating system. Hydronic systems use water to transfer heat to a distribution source, like a radiator, to heat a home. Hydronic systems can heat via hot water or steam, depending on the type of boiler used. The boiler is the part of the system that heats the water to be distributed.
For example if a ship is a steam powered ship, two or more boilers will be provided to produce high temperature, high pressure steam. If a ship is carrying a diesel engine as the main propulsion system, one or two smaller boilers are used for running various ship's machinery and services.
Boiler is an important piece of machinery that is being on ship. It is used to generate steam and in turn this steam is used for various purposes like heating of fuel oil, laundry etc. Since Boiler is a pressurized vessel and it is needed all the time, proper functioning of this piece of equipment is always necessary.
There is one more feed pump attached to the system, which helps in recuperating the loss of feed water by storing surplus feed from the drain tank. In case of a feed system in an auxiliary boiler, as found on diesel propulsion ships, the drain tank or the hot well is open to the atmosphere.
Oct 13, 2015 · 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.
A boiler is a self-contained combustion system that heats water. The hot water or steam produced by a boiler is then used in heating systems. Although designs vary, a boiler has four main parts: the burner, the combustion chamber, the heat exchanger and the pluming apparatus.
An attemporator might be used between superheater zones in a multi-zone superheater boiler or in a re-heater zone to control reheater outlet temperture. Desuperheaters are generally found in steam lines away from the boiler or boiler outlet piping where there is a downstream use for saturated steam.
- To minimize oxygen pitting and corrosion in boiler, steam and condensate system. 5) Phosphate test - To control the scale formation due to hardness (presence of Phosphate in sample means no hardness salts) - A reserve of phosphate should be maintained in the boiler water ready to neutralize any hardness salts which may enter.
Boiler is one of the main supporting machinery systems in the ship’s engine room. A part of the marine engineering syllabus, boilers are found on every type of cargo ship and thus need special attention during maintenance. Energy Audit on Ships: Audit of Marine Boiler. Energy Conservation in Boilers and Making a Boiler Report
The boiler hot well is where the condensate drains return from the condenser. This condensate may be contaminated as some of the drains are from f.o.heating systems or tank heating system. Normally these drains will pass to the hot well via an observation tank, which permits inspection of drain and their discharge to an oily bilge if contaminated.
There are basically two main types of feed systems : Open feed System; Closed feed system ; Open Feed System. A open feed system is found in a system with an auxiliary boiler, which is generally on a ship with a diesel engine. In an open feed system, steam from various systems comes to the condenser and gets converted into water.
Composite boilers are often used in conjunction with Diesel machinery, since if the exhaust gas from the engine is low in temperature due to slow running of the engine and reduced power output; the pressure of the steam can be maintained by means of an oil fired furnace.