Boiler Mounting
There are number of parts which are attached to boilers for their safe and proper working. They are as follow
1. Water Level indicators.
Water level indicator is a safety component use to indicate
the level of water inside the boiler to an observer. It is an essential
component needed for the proper and safe functions of boiler and it is mounted
on the front side of boiler.
2. Pressure Gauge.
Pressure gauges are uses to show the pressure, which builds
up inside the boiler due to steam. They re usually installed in front side of
boilers and bourden type pressure gauges are the most common type of gauge used
to measure the pressure.
3. Safety valve.
Safety valves are essential to protect boiler from explosion
due to very high pressure of steam inside the boiler. They are installed at
steam chest. Its function is to blow off the pressure when it exceed the safety
level. There are four main types of
safety valves
- Lever safety valve
- Dead weight safety valve
- high steam and low water safety valve
- spring loaded safety valve
4. Steam stop valve.
Steam stop valve in used to control the flow of steam from
boiler to the main steam pipe and shut down the steam supply when required. It
is installed the highest point of boiler with the help of a flange.
5. Blow off cock.
Function of blow off cock is to empty the boiler when
required and it also help in removing mud and scales from the bottom of the
boiler.
6. Feed check valve.
Feed check valve in use to regulate the flow of water into
the boiler. It is a non-return valve, installed the screw spindle to regulate
its lift. Valve must have its spindle lifted before the pump starts.
7. Fusible plug.
Fusible plug is fitted on the crown plate of the boiler. Its
function is to stop the fire when the water level is down from safety level.
Boiler Accessories
There are many parts which are integrated with boiler to
perform different jobs some of them are as follow
1. Feed Pump.
Water inn feed in to boiler by the means of feed pump,
centrifugal pump or reciprocating pump. But double acting reciprocating pump is
usually use these days.
2. Super heater
Function f super heater is increase the temperature of steam
without increasing its pressure. It is installed in the path of hot flue gases.
3. Economizer
Economizer is a heat exchanger use to pre-heat the water
before enter the boiler. It make use of hot flue gases to pre-heat water. There
are many advantages of using economizer
- Save 15 to 20% of fuel.
- Increase the steam rising capacity of boiler.
- Prevent scale formation in boiler.
- As water entering the boiler is hot so strain due to unequal expansion is minimized.
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