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BOILER

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DEFINATION

A Boiler is a closed vesselinwhich heat produced bythe combination of fuel istransferred to water for itsconversion into steam atdesired temperature andpressure.

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Use.The steam produced by

the boiler my be suppliedto steam engines orturbines for powergeneration,indusrial

process work,heatinginstallations and hot watersupply etc.

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CLASSIFICATIONSOFBOILERS

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FULTON SOURCE OF HEAT.ELECTRIC STEAM BOILER

WATER TUBE AND FIRE TUBE.NATURAL CIRCULATIONS AND FORCEDCIRCULATION.HORIZONTAL,VERTICAL OR INCLINED.SINGLE TUBE OR MULTI-TUBE.STATIONARY OR MOBILE.EXTERNALLY FIRED AND INTERNALLY FIRED.

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Boiler as a mechatronics system Boiler is

mechatronics system

as it mechatronicallycontrols

Heat level

water level

Pressure level

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Mechatronics SystemA system is said to be mechatronics system

if it ;Contain built in inteligence.

Control system.

Can perform required action without

human interference.

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ELEMENTS OF MECHTRONICSSYSTEM

SENSOR

SIGNALCONDITIONER

A/D CONVERTER

MICRO CONTROLER

D/A CONVERTERCORRECTION UNIT

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SENSORS IN BOILERHeat sensors

Water level sensorsPressure sensors

Wetness sensors

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Heat sensorA heat sensor sense the heat

and send error signal to themicrocontroller which take thedesired action

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Water level sensorWater level sensor isa sensor which

continouslymeasures the amountof water in a boiler

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Pressure sensorsPressure sensors aremeasures the

pressure in steam lineand in boiler

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Control unitSignal conditioner

a/d converter

Micro controllers

d/a converter

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Signal conditionerSignal conditioner

manipulates the error signalfrom the sensor in thecondition which is suitable formicro controller

usually In boiler controlsystem a signal conditioner isdifferential amplifier

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A/D & D/A CONVERTERSThey perform analog todigital & digital to

analog conversions Inorder to make the errorsignal suitable for microprocessors and

correction element

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Micro controllersIt decides what actionis to be taken in order

to achieve the desiredconditions.

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Correction unitIt produces a changein the process to

correct or change thecontrolled conditions.

The actuators is another name ofcorrection unit

it provides thepower to controlaction.

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Actuators in boilerWater relaysThermostats

Pressure relays

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MORE TYPESSimple vertical boiler

Fraser culman boiler

Co-chran boiler

Lancashire boiler

Superheater

La-Mont boiler

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FULTON ELECTRICSTEAM BOILER.

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WORKING

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STARTING OF BOILER.Open the steam valve.

Open all the valves in thewater feed line.

Open water gauge valves.

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STARTING OF BOILER.Switch on both main power

switches.Switch on the boiler controlcircuit using the switch on thetop of control pannel box.

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INSTRUCTIONS

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Carry out the following operationsEach morning start the boiler andgenerate not more than 5 p.s.i.g.steam, then switch off the boiler.

Open the boiler blow off valve for

approximately 5 seconds thenclosed the valve.

Open the water guage blow off

valve for 5 seconds.

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MAINTENENCEWeekly.

Three MonthlySemi Annually

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Water tube and fire tube There are two ways in which water can be

heated for being converted into steam.

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