b'MEASUREMENT AND CONTROLBy pairing QCS 4.0 with its OptiVisionsurface tension. The DevronizerEnhance tuning of CD controls Manufacturing Execution Systemsystem can be custom built forwith the Intellimap automated (MES), Honeywell can provide valuableFourdrinier, Couch or Pressalignment and tuning tool, which production-related data to either theapplications, including steam andoffers fully automated tuning end user or its OEM partner. Thecondensation units where optimalfunctionality for Honeywell resulting analysis makes it possible tosteam temperature and pressureCD multivariable controllers. improve product quality and productionare essential. The Intellimap tool enables yield, reduce sheet breaks andImprove rewetting with theon-site personnel to maintain downtime, lower energy costs, reduceAquatrol and Aqualizer/Aqualizerand optimise CD controls for operating expenses, and standardiseII re-moisturisation systems,maximum results.operations across production lineswhich are used for rewetting at and multiple sites throughout thethe very end of the machine orADDRESS CRITICAL PRODUCTION ISSUESenterprise. for low-grammage papers. TheseMeasurement and control units are effective in increasingperformance is critical to maintaining Honeywells integrated approachthe average amount of water inhigh standards of paper production. to pulp & paper operations alignsthe web and/or helping to avoidThere are two control challenges advanced QCS technology with acurling. involved in these processes: machine wide range of CD actuator systemsExtend re-moisturisationdirectional (MD) control and cross and control solutions, enabling millperformance with the new, state- directional (CD) control. Machine operators to: of-the-art Aqualizer MX solution,direction refers to the direction in which improves web moisturewhich paper sheet travels and cross Control dilution water in both linearprofiles by 60 percent. direction refers to the direction and rotational headboxes withControl CD coat weight withperpendicular to machine direction.ProFlow dilution control actuators,the ProCoat CD control system,In a typical paper machines QCS which are engineered to performwhich is intended for on- and off- operation, a measurement subsystem on any consistency profilingmachine blade and rod coatingwith multiple sensors scans across the headbox, with virtually any type ofoperations. The ProCoat systemsheet and, at the end of every scan, valve, providing improved resultsuses intelligent actuators toreports the average measurement for all paper grades. selectively change the CD coatingfor each sensor. These scan-average Control fibre orientation withapplication to level the coatvalues are input to the MD controller, the AutoSlice system, whichweight profile. which manipulates a process handle provides superior CD basis weightMaintain proper calendarto reduce the machine direction control through headbox slice liptemperature with the Calcoilvariability. MD weight control is automation. The systems narrowlyinduction heating system, whichtypically performed by manipulating spaced, intelligent actuatorsprovides efficient roll surfacethe basis weight valve that controls the with fast response and preciseheating for CD profile control andstock flow to the machine while MD movement provide tight CDadvanced sheet processing. moisture control is typically performed control. The AutoSlice solution canOptimise finishing processes withMeasurementby manipulating the valve that controls be used where color is a sensitivethe Calendizer dry end steamand controlsteam pressure to the dryers. The quality criteria and dilution couldshower system, which providesperformanceMD controller then transforms the have an influence. reliable temperature and moistureis critical toMD weight and/or moisture quality Optimise moisture profilesgradient calendaring. Themaintaininghistogram from flat and wide to tall with Devronizer steam showerCalendizer system can be usedhighand skinny.technology, which increasesto smooth fibres on top of thestandards dryness and reduces sheetsheet, as well as improve gloss,of paperThe measurement subsystem also breaks through improvedsmoothness and CD profiles. production. provides precise cross-direction values 56 WORLD PULP&PAPER'