control & instrumentaion
TRANSCRIPT
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INSTRUMENTAION= SENSE ORGANS
CONTROL= NERVOUS SYSTEM
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MEARURSEING INSTRUMENTSy PRESSURE : GAUGE, TRANSMITTERS
y TEMPERATURE: RTD, THERMOCOUPLE,INFRARED SENSEOR
y FLOW: ORIFICE, CORIOLIS,ULTRASONIC FLOW METER ETC
y LEVEL: TRANSMITTESR, SONARPROBES.
y SWITCHES: PRESSURE, TEMP, FLOW etc.
y SPEED: HALL PROBE
y VIBRATION: VIBRATION PICKUPS
y
AXIAL SHIFT: LVDTy THERMAL EXPANSION: LVDT
y ANALYSERS:CONDUCTIVITY, HYDROGEN PURITY, pH, O2, SOX,NOX, CO ETC
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Pressure and temp gauge RTD and Thermocouple Flow switches
Level transmitters
SWAS Analyzers
Transmitters
Turbovisory equipments
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POPULATION PER UNITy TRANSMITTERS : PRESSURE,FLOW,LEVEL,TEMP200
y
SWITCHES:P
RESSURE,FLOW,TEMP,LEVEL ETC 200
y THERMO COUPLES: 275
y RTDS: 400
y
ANALYSERS: 25y ACTUATORS : PENUMATIC200
y DRIVE OF ELECTRICAL ACTUATORS 250
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BEST O&M PRACTICESy Preventive maintenance
The care and servicing by personnel for the purpose of maintaining
equipment and facilities in satisfactory operating condition byproviding for systematic inspection, detection, and correction ofincipient failures either before they occur or before they develop intomajor defects. Check list has been prepared and PM is being done in 2ways
1. In running condition: checking of instruments exte
rnally, cleaning,terminal tightening, arresting leakages, replacement of damaged
equipments, checking of alarm fasciaetc.
2. In shutdown condition: isolation of instruments, calibration,replacement of defective parts, checking of interlock protection.
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BEST O&M PRACTICESy Tune up ofrunning auto loops: as and
when required
y Tools : Equip O&M staff with state-of-the-artdiagnostic tools. These tools allow O&M staff andmanagers to troubleshoot and detect malfunctions.
y Documentation: Useing effective documentation tomaintain continuity and reduce trouble-shooting costs.
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DATA ACQUSITON SYSTEM
yWSPOSE BY BHELy PROCESS 1000 ANALOG AND 2000 BINARY
SIGNAL APPROXIMATLY AND DISPLAY IN USERFRENDLY FORMATE FOR OPERATION WINGSUCH AS TREND, GROUP DATA, PROFILE,
ALARM LOG, SHIFT LOG, DAY LOG,RETRIVALOF OLD DATA ON REQUEST ETC.
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DAS
Schematic diagramTrendsAlarm logs
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CONTROLy FURNACE SAFEGAURD SUPERVISORY SYSTEM
implement logics by NFPA for protection of furnace.
consists logic ofboiler MFR, Mill and PA interlock andprotection, flame scanners etc.
y ELECTRONIC AUTOMATION OF STEAM TURBINE
Takes care of protection of turbine, rolling to the speed
of 3000 rpm, synchronization, load control,Turbovisory parameters, coasting down in case oftripping and many more functions
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CONTROLy DISTRIBUTED DIGITALCONTROLS
Heart of C&I system. It acquires various process
parameters , do signal conditioning and control thedesired parameters automatically.
Example: Furnace pressure control, drum level controlsand hundreds of other parameters.
Present system: Procontrol P-13At least 25 years old system & almost in obseletion stage
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MODERANISATION: SWITCH OVER TO maxDNA
y HPBP and APRDS system of unit # 2 in 2005.
y Order For HPBP and APRDS system of unit # 1
already given and will be implemented in capital overhaul.y Complete changeover of EAST in one unit. PO placed
y Replacement of DDC and FSSS of one unit to maxDNA:enquiry placed to BHEL.
yPbased variable frequency Feeder control systeminstalled in U#2
y Same to be done in U#1 indent raised.
y Revival of SWAS in unit#1 to be carried out.
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DDC
DDC panel
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DDC
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maxDNA
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TRENDS ANDDISPLAY IN maxDNA
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WORK FORCE
ESE C&I
EEE(C&I)-I SR. Engr-I
Engineer- 05
Technician- 07
Helper-10
EEE(C&I)II SR. Engr-II
Engineer - 01
Technician- 07
Helper-10
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THANK YOU