Boiler accessories are the devices which are used as integral part of a boiler and help in running efficiently. Some of the important boiler accessories are listed below
- Feed pump
1. Feed Pump
Feed Pump is used to deliver water to the boiler. A feed pump may be of centrifugal type or reciprocating type. But a double acting reciprocating pump commonly used as a feed pump these day.s
Superheater is an important device of a steam generating unit. Its purpose is to increase the temperature of saturated steam without raising its pressure. Superheater is generall an integral part of boiler, and is placed in the path of hot flue gases from the furnace. The heat, given up by these flue gases, is used in superheating the steam. Such superheaters, which are installed within the boiler, are known as integral superheaters.
Economiser is a device used to heat feed water by utilising the heat in the exhaust flue gases before leaving through the chimney. It improves the economy of the steam boiler.
Following are the advantages of using an economiser.
- There is about 15 to 20 % of coal saving.
- It increases the steam raising capacity of a boiler because it shortens the time required to convert water into steam.
- It prevents formation of scale in boiler water tubes, because the scale formed is the economiser tubes can be cleaned easily.
- since the feed water entering the boiler is hot, therefore strains due to unequal expansions are minimised.