Process and apparatus for moisture and fiber content control in a papermaking machine

摘要: DISCLOSED ARE A SYSTEM FOR AND METHOD OF CONTROLLING PROCESSES PAPER SHEET MANUFACTURE. IN RESPONSE TO BASIS WEIGHT SIGNALS AT THE PROCESS WET DRY ENDS, AS WELL MOISTURE SIGNAL FROM END, PROPORTIONALITY CONSTANT INDICATIVE FIBER FRACTION END IS COMPUTED. REPEATEDLY RECOMPUTED ONCE EVERY TWENTY MINUTES STORED BETWEEN RECOMPUTATIONS. COMBINED WITH OUTPUT DERIVED LATER TIME THAN ABOVE INDICATE CONTENT CONTROL FLOWING ONTO MAKING HEADBOX. FLOW INTO HEADBOX REMOVED BY DRYING SECTIONS RESPECTIVELY REPONSE INDICATIONS AMOUNT BEING LESS DEFECTIVE LIMITS. DRYERS CONTROLLED COMPOSITE PROFILE MOISTURE. SO THAT INHERENT LAG STEAM UNITS THEREIN COMPENSATED HEAT SUPPLIED TRIM DRYERS, HAVING FAST TIMES. DERIVE INSTANTANEOUS VALUES AVERAGE WEIGHT, GAUGE NORMALLY SINGLE POINTED ONLY PERIODICALLY SCANNED ACROSS SHEET. D R W I N G