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Efficient Steam system control
| Date post: | 20-Mar-2017 |
| Category: |
Engineering |
| Upload: | magdy-aly |
| View: | 67 times |
| Download: | 1 times |
EfficientSteamsystemcontrol
TheProblem
Area
Flowcontrol
Problem
NoSteamflow-metersatproductionandconsumerside
Existingflowmetersarenotcalibratedregularly
Impact missingofimportantdataneededfor
PlantEfficiency
EnergyEfficiency
ProcessControl
CostingandCustodyTransfer
Solution Usesteamflowmeterswhenitisfeasible youcanonlycontrolwhatyoucanmeasure
Pressurecontrol
Atgenerationside(boilerside)
Problem Producingsteamatlowerpressure
Impact
Poorboilerefficiency
Highsteamconsumption
Highfuelconsumption
AtconsumersideProblem Unstablepressure(poorcontrol)
Impact Performancefluctuation
Solution
Atboilerside generatesteamatmaximumpressureaccepted
Atconsumerside usesuitableletdownvalves
DirectActingControlValves
PilotOperatedValves
PneumaticallyOperatedValves
Temperaturecontrol
Problem Poorinletsteamcontrol
Impact
Performancefluctuation
overheatingordiscomfortforapplication
Mechanicaldamage
Lossofefficiency
Solution usesuitabletemp.controlvalve
ManualControlValves
SelfActingControlValves
PilotOperatedValves
PneumaticallyOperatedValves
Condensateremoval
Problem Poorsteamtrapsperformance
Impact
Performancefluctuation
waterlogging
Lossofefficiency
waterhammerandvibration
Solution Considerthefollowingaspectsinselection
Thedifferentialpressure
Thesizeofthedischargeorifice
Thecondensatetemperature
Commonresult Highoperationalandmaintenancecost
Solution
ProposedActions
Checktheexistingsteamflowmetersandpreparealistofneededflowmeters
Prepareacalibrationplanfortheexistingsteammetersonceevery6monthsifpossible.
Increaseboilerpressureclosetoboilerdesignpressureandadjuststeampressureatconsumersidewithletdownvalve
Applyregularfunctionalsteamtrapsmaintennceprogram
Checkfeasibilityofusingletdownorextractionturbineinsteadofletdownvalvestorecovertheenergy
Checktheexistingsteaminlettemperaturetrendforsteamconsumersandevaluateyourcurrenttemp.controlsystemperformance.
Checktheexistingsteaminletpressuretrendforsteamconsumersandevaluateyourcurrentpressurecontrolsystemperformance.
360ProactiveEngineerwww.360ProcativeEngineer.com
EfficientSteamsystemcontrol
TheProblem
Area
Flowcontrol
Problem
NoSteamflow-metersatproductionandconsumerside
Existingflowmetersarenotcalibratedregularly
Impact missingofimportantdataneededfor
PlantEfficiency
EnergyEfficiency
ProcessControl
CostingandCustodyTransfer
Solution Usesteamflowmeterswhenitisfeasible youcanonlycontrolwhatyoucanmeasure
Pressurecontrol
Atgenerationside(boilerside)
Problem Producingsteamatlowerpressure
Impact
Poorboilerefficiency
Highsteamconsumption
Highfuelconsumption
AtconsumersideProblem Unstablepressure(poorcontrol)
Impact Performancefluctuation
Solution
Atboilerside generatesteamatmaximumpressureaccepted
Atconsumerside usesuitableletdownvalves
DirectActingControlValves
PilotOperatedValves
PneumaticallyOperatedValves
Temperaturecontrol
Problem Poorinletsteamcontrol
Impact
Performancefluctuation
overheatingordiscomfortforapplication
Mechanicaldamage
Lossofefficiency
Solution usesuitabletemp.controlvalve
ManualControlValves
SelfActingControlValves
PilotOperatedValves
PneumaticallyOperatedValves
Condensateremoval
Problem Poorsteamtrapsperformance
Impact
Performancefluctuation
waterlogging
Lossofefficiency
waterhammerandvibration
Solution Considerthefollowingaspectsinselection
Thedifferentialpressure
Thesizeofthedischargeorifice
Thecondensatetemperature
Commonresult Highoperationalandmaintenancecost
Solution ProposedActions
Checktheexistingsteamflowmetersandpreparealistofneededflowmeters
Prepareacalibrationplanfortheexistingsteammetersonceevery6monthsifpossible.
Increaseboilerpressureclosetoboilerdesignpressureandadjuststeampressureatconsumersidewithletdownvalve
Applyregularfunctionalsteamtrapsmaintennceprogram
Checkfeasibilityofusingletdownorextractionturbineinsteadofletdownvalvestorecovertheenergy
Checktheexistingsteaminlettemperaturetrendforsteamconsumersandevaluateyourcurrenttemp.controlsystemperformance.
Checktheexistingsteaminletpressuretrendforsteamconsumersandevaluateyourcurrentpressurecontrolsystemperformance.
360ProactiveEngineerwww.360ProcativeEngineer.com
