Presentation On Inplant Training and Instrumentation in BHEL

INTRODUCTION TO BHEL

BHEL is the largest engineering and manufacturing enterprise in India in energy related infrastructure sector today. BHEL was established more than 40 years ago. When its first plant was set up in Bhopal ushering in the indigenous heavy electrical equipment industry in India, a dream which has been more than realized with a well recognized track record of performance. It has been earning profits continuously since 1971-72 and achieved a sales turnover of rupees 6347crores with a pre tax profit of rs294 crores in 2000 to 2001.

PRODUCTS OF BHEL (HYDERABAD):

• 1. TURBINES• A) Steam Turbines • B) Gas turbines• 2. TURBINE GENERATORS• A) Steam turbine generators• B) Gas turbine generators• C) Air cooled generators• 3. COMPRESSORS• 4. SWITCH GEAR EQUIPMENT• 5. PUMPS• 6. OIL FIELD EQUIPMENT• 7. PULVERISING MILLS• 8. HEAT EXCHANGERS• 9. STORAGE VESSELS.• 10. CIRCUIT BREAKERS (HV)• 11. SYNCHRONOUS CONDENSERS

ContentIntroduction

CA12E HANDY CALIBRATOR Thermocouple

RTDContactor

On – Off controllerOn – Off controller Arrangement

Circuit BreakerPressure Switch

HeaderHeat Exchanger

CondenserBoiler

CA12E HANDY CALIBRATOR

• Manufacturer – Yokogawa.• Used for calibration of thermocouples and RTDs.• Can be used as either Source or sink.

THERMOCOUPLE

A thermocouple is a thermoelectric temperature measuring device formed by welding soldering or merely pressing two dissimilar metals together in series to produce the thermal electromagnetic force (e), when the junction is at the different temperatures.

RTDs

RTDs are passive sensors requiring an “excitation” current to be passed through them. The RTD is normally manufactured through a known resistance typically 100 ohm at ice point. It has positive temperature of resistance. Commonly pt-100 is used.

Contactor

• Used to make or break connection at low voltage.

• It can have a combi- -tion of NO or NC Contacts.

On – Off Controller• It is used to maintain the value of process variable near specified set point.• Model : UNI 7E• Power supply : 220v AC +/-15% , 50/60HZ• Power Consumption : Approximately 1.5VA• Display method: 7 Segment Red LED Display• Input sensor : UNIVERSAL SENSOR INPUT Thermocouple - J , K , E & T RTD - DIN Pt100, JIS Pt100, Nickel 120

On – Off controller Arrangement

Circuit Breaker

• SF₆ (Sulphur Hexafluoride).• Used to switch high voltage.• SF₆ is used to arrest the arc generated while switching.• It takes 0.1 ms to switch between connections.

Pressure Switch

• It’s a mechanical device, used to make or break a electrical connection.

• A spring is used to provide the pressure limit.• The excess pressure is released through outlet.

Header

• Header is used to install the measuring devices.

Header

Heat Exchanger

• Heat exchangers are devices in which heat is transferred between two fluids at different temperatures without any mixing of the fluids.

Condenser

• A condenser is a device or unit used to condense a substance from its gaseous to its liquid state.

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Boiler

BURNERWATER

SOURCE

BRINE

SOFTENERSCHEMICAL FEED

FUELBLOW DOWN SEPARATOR

VENT

VENTEXHAUST GASSTEAM TO PROCESS

STACK DEAERATOR

PUMPS

Figure: Schematic overview of a boiler room

BOILER

ECO-NOMI-ZER

Boiler Accessories

• Feed pumps.• Economizer.• Air- Pre heater.• Super heater.• Upper drum and lower drum.• Safety valve.• Re – heater.• Fans – Force Draft fan - Induced Draft fan.

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