Class ScrewPress

java.lang.Object

neqsim.util.NamedBaseClass

neqsim.process.SimulationBaseClass

neqsim.process.equipment.ProcessEquipmentBaseClass

neqsim.process.equipment.separator.SolidsSeparator

neqsim.process.equipment.separator.ScrewPress

All Implemented Interfaces:

Serializable, Runnable, ProcessEquipmentInterface, ProcessElementInterface, SimulationInterface, NamedInterface

public class ScrewPress
extends SolidsSeparator

Screw press for bio-processing dewatering.

A mechanical press that uses a rotating screw to compress biomass or slurry, squeezing out liquid. Commonly used for fiber dewatering, press-mud removal in sugar mills, and biosolids dewatering in wastewater treatment.

Typical parameters:

• Solids recovery: 85-95%
• Cake moisture: 55-75%
• Specific energy: 0.5-2 kWh/m3 (very low energy)

Version:

1.0

Author:

NeqSim team

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private double	compressionRatio	Compression ratio.
private double	screwSpeed	Screw speed in RPM.
private static final long	serialVersionUID	Serialization version UID.

Fields inherited from class SolidsSeparator

equipmentType, inletStream, liquidOutStream, solidsOutStream

Fields inherited from class ProcessEquipmentBaseClass

conditionAnalysisMessage, energyStream, hasController, isSolved, properties, report

Fields inherited from class SimulationBaseClass

calcIdentifier, calculateSteadyState, time

Fields inherited from class NamedBaseClass

name

Constructor Summary

Constructors

Constructor	Description
ScrewPress(String name)	Constructor for ScrewPress.
ScrewPress(String name, StreamInterface inletStream)	Constructor for ScrewPress with inlet stream.

Method Summary

Modifier and Type	Method	Description
double	getCompressionRatio()	Get the compression ratio.
double	getScrewSpeed()	Get the screw speed.
void	setCompressionRatio(double ratio)	Set the compression ratio.
void	setScrewSpeed(double rpm)	Set the screw speed.

Methods inherited from class SolidsSeparator

getDefaultSolidsSplit, getInletStream, getLiquidOutStream, getMoistureContent, getPowerConsumption, getPressureDrop, getSolidsOutStream, getSolidsSplitFraction, getSpecificEnergy, run, setDefaultSolidsSplit, setInletStream, setMoistureContent, setPressureDrop, setSolidsSplitFraction, setSpecificEnergy, toJson

Methods inherited from class ProcessEquipmentBaseClass

addCapacityConstraint, addController, copy, displayResult, equals, getAvailableMargin, getAvailableMarginPercent, getBottleneckConstraint, getCapacityConstraints, getConditionAnalysisMessage, getConstraintEvaluationReport, getController, getController, getControllers, getEffectiveCapacityFactor, getEnergyStream, getEntropyProduction, getExergyChange, getFailureMode, getMassBalance, getMassBalance, getMaxUtilization, getMaxUtilizationPercent, getMechanicalDesign, getMinimumFlow, getPressure, getPressure, getProperty, getReferenceDesignation, getReport_json, getResultTable, getSpecification, getTemperature, getTemperature, getThermoSystem, getUtilizationSummary, hashCode, initElectricalDesign, initializeDefaultConstraints, initInstrumentDesign, initMechanicalDesign, isActive, isActive, isCapacityAnalysisEnabled, isCapacityExceeded, isFailed, isHardLimitExceeded, isNearCapacityLimit, isSetEnergyStream, reportResults, restoreFromFailure, run_step, runConditionAnalysis, setCapacityAnalysisEnabled, setController, setEnergyStream, setEnergyStream, setFailureMode, setFlowValveController, setMinimumFlow, setPressure, setReferenceDesignation, setRegulatorOutSignal, setSpecification, setTemperature, simulateDegradedOperation, simulateTrip, solved, toJson

Methods inherited from class SimulationBaseClass

getCalculateSteadyState, getCalculationIdentifier, getTime, increaseTime, isRunInSteps, setCalculateSteadyState, setCalculationIdentifier, setRunInSteps, setTime

Methods inherited from class NamedBaseClass

getName, getTagNumber, setName, setTagNumber

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface NamedInterface

getName, getTagName, getTagNumber, setName, setTagName, setTagNumber

Methods inherited from interface ProcessEquipmentInterface

getCapacityDuty, getCapacityMax, getElectricalDesign, getEquipmentState, getExergyChange, getExergyDestruction, getExergyDestruction, getFluid, getInletStreams, getInstrumentDesign, getOperatingEnvelopeViolation, getOutletFlowRate, getOutletPressure, getOutletStreams, getOutletTemperature, getReferenceDesignationString, getRestCapacity, getSimulationValidationErrors, isSimulationValid, isWithinOperatingEnvelope, needRecalculation, validateSetup

Methods inherited from interface SimulationInterface

getCalculateSteadyState, getCalculationIdentifier, getTime, increaseTime, isRunInSteps, run, run_step, runTransient, runTransient, setCalculateSteadyState, setCalculationIdentifier, setRunInSteps, setTime

Field Details

serialVersionUID

private static final long serialVersionUID

Serialization version UID.

See Also:

• Constant Field Values

screwSpeed

private double screwSpeed

Screw speed in RPM.

compressionRatio

private double compressionRatio

Compression ratio.

Constructor Details

ScrewPress

public ScrewPress(String name)

Constructor for ScrewPress.

Parameters:

name - name of the screw press

ScrewPress

public ScrewPress(String name,
 StreamInterface inletStream)

Constructor for ScrewPress with inlet stream.

Parameters:

name - name of the screw press

inletStream - the feed stream

Method Details

setScrewSpeed

public void setScrewSpeed(double rpm)

Set the screw speed.

Parameters:

rpm - screw speed in RPM

getScrewSpeed

public double getScrewSpeed()

Get the screw speed.

Returns:

speed in RPM

setCompressionRatio

public void setCompressionRatio(double ratio)

Set the compression ratio.

Parameters:

ratio - compression ratio

getCompressionRatio

public double getCompressionRatio()

Get the compression ratio.

Returns:

compression ratio