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US 2012/0071702A1 Mar.22,2012 erativeturbinepump 60impeller(FIG.2C,63)speedand regulated by the discharge pressure control valve 80, is increased. [0045] Oncebubblegenerationisunderway,theoptional discharge bubble detection apparatus 71 is used to detect and measure any bubbles that remain in the process Water ?oW downstreamoftheregenerativeturbinepump 60.Ifbubbles are detected in the discharge ?oW, Where none should be present,orifbubbleslargerthenthosethatshouldbepresent are detected, then the discharge pressure setpoint can be increased. tainingastablelightvacuum(forexample,~0.95atm)Within the separator. Fuel gas transfer pump control PLC 206 receives the separator 90 pressure data from the gas liquid separatorpressuresensor209,Whichmay includepressure element 209a, pressure transmitter 209b, and pressure indi cator 2090 and uses this value as a process variable, continu ously recalculating a speed setpoint 217 for the fuel gas transfer pump 92. The pressure process control variable is transmittedtothefuelgastransferpump speedcontrolPID 207alongWiththecurrentlycalculatedfuelgastransferpump speed setpoint 217. PID 207 calculates and transmits an ana logordigitalsignalrepresentingthedesiredfuelgastransfer pump 92 speed setpoint 217 to the fuel gas transfer pump speedcontroller208WhichvariesthedeliveredNC poWer frequencysuchthatthefuelgastransferpump 92rotatesat thespeedsetpoint217.PLC 206communicatesdirectlyWith PLC 211,providingfuelgasproductionratedatatoPLC 211 for use in overall process ef?ciency calculation and setpoint adjustment, and for process interruption and/or operational parameteradjustmentsinresponsetoinef?cientorimproper operation as determined by conditions in the gas liquid sepa rator 90. The gas liquid separator liquid level controller 94 operates the process Water transfer pump 96 as required, returningprocessWaterthroughtheprocessWaterreturnpipe 98 totheprocessWatersupply20.The fuelgastransferpump 92deliversthecarbonmonoxide,methaneandhydrogenfuel gas to either a fuel gas storage vessel (not shoWn) or to a fuel consuming device or process. [0049] TheprocessWaterandfuelgashandlingsubsystems [0046] Anincreaseinregenerativeturbinepump60dis charge pressure can be accomplished in at least tWo Ways. First, Where the current discharge pressure setpoint, as regu lated by the discharge pressure control valve 80, is less than theshutoff,ormaximum, pressureoftheregenerativeturbine pump 60Whileoperatingatitscurrentspeedsetpoint,thenthe discharge pressure control valve 80 is used to increase the discharge pressure setpoint. Second, Where the current dis chargepressuresetpointisequaltothemaximum possibleat thecurrentregenerativeturbinepump speedsetpoint,thenthe pump impeller63 speedsetpointisincreased.Consequently, the maximum possible discharge pressure setpoint is increased. Once the regenerative turbine pump impeller 63 speedsetpointisincreased,additionalupWarddischargepres sure increase and regulation is accomplished by increasing thedischargepressuresetpointofthedischargepressurecon trolvalve80.InthisWay,thedischargepressuresetpointand theregenerativeturbinepump60speedsetpointcanbe manipulatedindependently,alloWingaparticularapplication oftheapparatusmaybeout?ttedWithrelief,bypassorother to achieve and sustain a particular discharge pressure set unloader valves (not shoWn) and other safety devices and point,asrequiredtocollapsethegeneratedbubbles,Whileat featuresasrequiredbythenatureoftheparticularapplication. thesame timevaryingtheregenerativeturbinepump impeller 63 speed setpoint. This enables the precise timing of the impeller buckets (FIG. 2A, 64) passing by the regenerative turbinepump 60inlettothenumberofbubblesoutputbythe bubblegenerationapparatus30,enablingtheaforementioned [0050] Thecontroller100providesbothoperationcondi desired collapse of bubbles singularly in an isolated Way at, forexample,theireigenfrequencies. tion detection and control services for the apparatus. In its role as a pump motor control system, the controller 100 generatesandtransmitstothevariablefrequencydrive126 motorcontrollerstart,stopandothervariablefrequencydrive function commands and the pump motor speed setpoint 109 signal. The variable frequency drive 126 isconnected to and providespoWerfortheregenerativeturbinepump 60motor, controllingthemotor’srotationalspeedandconsequentlythe coupled regenerative turbine pump 60 speed as directed by the motor speed control pilot signal received from the con troller100.Inadditiontoregenerativeturbinepump 60motor control, the controller 100 operates the motoriZed inlet valve pilotregulator26andmotorizeddischargevalvepilotregu lator 82, varying the inlet pressure, as regulated by the inlet pressure control valve 24, and the discharge pressure, as regulated by the discharge pressure control valve 80. The controller 100 also monitors and can record apparatus sub systemparametervaluesreceivedfromthepump inletpipe22 and discharge pipe 75 sensors 40, 71, 111, 112,113, 114 and recalculates setpoints related to the system’s operation as [0047] Again,continuingWithFIGS.1Aand1B,thepro cess Water noW passes by the discharge pressure 113 and temperature sensors 114, as Well as any other detectors or sensors that are installed to measure the composition or con dition of the process Water in the discharge pipe 75. The discharge pressure and temperature sensors 113, 114 may includesensorelements113a,114a,transmitters113b,114b, and indicators 113c, 1140. The process Water ?oWs through thedischargepressurecontrolvalve80andintothegasliquid separator 90. The discharge pressure control valve 80 is con ?gured for regulation of process Water pressure upstream of the discharge pressure control valve 80, that is,pressure regu lation occurs in the discharge pipe 75 betWeen the regenera tiveturbinepump 60andthedischargepressurecontrolvalve 80. The inlet pressure control valve 24, on the other hand, regulatespump inletpipe22pressuredoWnstreamoftheinlet pressurecontrolvalve24.InthisWay,thepressuretocollapse the carbon dioxide bubbles is set and regulated by combined manipulationofthedischargepressurecontrolvalve80pres requiredbyaparticularapplication. suresetpoint108andtheregenerativeturbinepump 60speed setpoint109. [0048] Finally,theprocessWatercontainingdissolvedfuel apparatusoperationalsequenceandotherfunctions.Thecon gas and bubbles of fuel gas passes into the gas liquid separator 90. Fuel gas isdraWn out ofthe separatorby action ofthe fuel gastransferpump 92.De-gasi?cationiscontrolledbymain troller logic 101 can be changed as required to include func tions speci?c to a particular apparatus con?guration. FIGS. 1A and1B shoWanexemplarysetofdetectorsandcontrolling Additionally, inletand discharge isolation (not shoWn) and check valves (not shoWn) should be installed Where required topreventimproperHow andtoprovideforapparatusisola tion,testingandservice. [0051] Thecontrollerlogic101storedandexecutedbythe controllerlogicPLC 211providesthecontroller100andthePDF Image | CHEMICAL REACTOR SYSTEM AND METHOD REGENERATIVE TURBINE
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