boiler essential controls
DESCRIPTION
Essential Controls of Boiler a presentation for Boiler Operating Engineers by Mr. N. Nagendra Prasad. Free to share without any modificationsTRANSCRIPT
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Instruments for Safe Operation and Instruments for Safe Operation and Improving Efficiency in BoilersImproving Efficiency in Boilers
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 email: email: [email protected]@gmail.com
N. Nagendra PrasadN. Nagendra PrasadB.E.(Mech.), MIE, AVSI(Sugar Engg.), C.Eng(I), BOEB.E.(Mech.), MIE, AVSI(Sugar Engg.), C.Eng(I), BOE
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
Why Why Control ?Control ?
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
Safe Safe OperationOperation
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
EfficiencyEfficiency
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
Manual Control Manual Control
Automatic ControlAutomatic Control
TYPES OF CONTROLS
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
Essential Essential ComponentsComponents
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
CONTROLLERSCONTROLLERS
SENSORSSENSORS
TRANSMITTERSTRANSMITTERS
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
I/P Converters
Control Valve
Pneumatic Cylinder with Hand Wheel
OUTPUT CONVERTERS & DEVICESOUTPUT CONVERTERS & DEVICES
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
Input Sensor& Converter
PID Controller
OutputConverter
4-20mA 4-20mAProcessSignalPressureD.P.Temp. etc.
Set PointSV Output Device
Control Valve /Cylinder etc.
O/p Signal
Fig. 1
Single Loop ControlSingle Loop Control
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S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
CONTROL OF ALL BOILER ESSENTIAL PARAMETERS BY MULTI LOOP CONTROLLER
PID Multiply
Compensation ADD
PID
ConstantSet Value(Drum Level)
Drum Level
Steam FlowX
Y
EV
T
CSV
PV
PV
O/P 1
Feed Water Control Valve
3 Element Drum Level Control(With Compensation)
Steam Temp.Steam Press.Feed Water Flow
IP 5
IP 4IP 3
IP 2
IP 1
PV Process ValueSV Set ValueEV Error ValueX Makup for DrumY Evaporation quantityT Total Water requirementCSV Cascade Set Value
Fig. 2
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
Fuel Feeding (Steam Pressure) Control
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
Furnace Pressure
Deaerator Level
Deaerator Temperature
PIDSet Value(F.Pressure)
Balanced Draft Control
PIDSet Value(Level)
Deaerator Level Control
PIDSet Value(Temp.)
Deaerator Temperature Control
ID Damper Adjusting Cylinder or VFD I/p
O/P 4
O/P 5
O/P 3
Makup Water Control Valve
LP Steam Control Valve
PV
PV
PV
IP 6
IP 7
IP 8
OTHER ESSENTIAL CONTROLSOTHER ESSENTIAL CONTROLS
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
ADVANCED CONTROLSADVANCED CONTROLS
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Control Systems for BoilersControl Systems for Boilers..N. Nagendra PrasadN. Nagendra Prasad
S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
Instruments for Improving EfficiencyInstruments for Improving Efficiency
Oxygen Analyser & Trimming For measuring Oxygen in flue gas and to trim (reduce) excess air CO/CO2 Analyser For measuring the CO/CO2 in flue gas to know the status of complete combustion and to reduce incomplete combustion loss Optical Pyrometer / IR Camera For monitoring and controlling combustion in furnace / radiation losses CBD Tank Level control For utilisation of Flash steam (to De-aerator or other) from CBD water LP/HP Heater Controls For improving the overall system efficiency of Power Plant
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S.V. S.V. Engineers & ConsultantsEngineers & Consultants, #86, J.D. Nagar, Patamata, Vijayawada , #86, J.D. Nagar, Patamata, Vijayawada 520052001010 Ph: 9440978459 Ph: 9440978459
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