REGULATION SYSTEM FOR THE SHORT CIRCULATION AND HEADBOX OF A PAPER MACHINE OR EQUIVALENT
申请公布号:WO0121885(A1)
申请号:WO2000FI00797
申请日期:2000.09.20
申请公布日期:2001.03.29
发明人:LUMIALA, JUHANA;LEPOMAEKI, HANNU;JETSU, PETRI;NYBERG, PETRI;KAREMA, HANNU;KELLOMAEKI, MARKKU;SALMELA, JUHA
分类号:D21F7/00;D21F1/02;D21F1/06;D21F1/08;D21F1/66;(IPC1-7):D21F1/02
主分类号:D21F7/00
摘要:The present invention relates to a method for measuring and controlling the short circulation of a paper machine or equivalent and measurement and control of the headbox, said short circulation comprising apparatus for diluting thick stock into the headbox consistency, and apparatus for cleaning the stock to be fed into the headbox, and in which the headbox (10) comprises a stock inlet header, a tube bank, a turbulence generator and a slice channel. In the method, the measurement targets (PA, PB, PC, PD, 10) are provided with means for measuring the fibre mobility of the fibre suspension and, on the basis of the fibre mobility measured from the fibre suspension, the flow state of the fibre suspension is controlled. The invention also concerns the headbox (10) of a paper machine or equivalent, comprising a stock inlet header, a tube bank, a turbulence generator and a slice channel. In addition, the headbox comprises sensors on the width of the headbox (10) or a traversing sensor/sensors, which is/are positioned on different width points of the headbox (10) and that the sensor/sensors is/are arranged to measure the fibre mobility profile of the headbox and that the headbox (10) comprises means for changing the flow state on the basis of the measurement data obtained from the sensors. The invention also relates to a short circulation of a paper machine or equivalent, comprising apparatus for diluting the thick stock into headbox consistency and units for cleaning the stock to be fed into the headbox. The short circulation comprises also a sensor/sensors, being disposed in the short circulation pipes and/or cleaning units and that the sensor/sensors is/are arranged to measure the fibre mobility of the fibre suspension in the short circulation, and that the short circulation includes means for changing the flow state on the basis of the measurement data obtained from the sensors.
Accelerated verification of digital signatures and public keys
Method of fabricating a semiconductor package with mold lock opening
Floating solar energy conversion and water distillation apparatus
Blending telephony services in an internet protocol multimedia subsystem
Method for dual energy implantation for ultra-shallow junction formation of MOS devices
System, method, and computer software for the presentation and storage of analysis results
Magnetostrictive pressure regulating system
Medical manipulator device and actuator suitable therefor
Child safety seat magnetic web attachment
Gate latch apparatus and methods of use
Method and system for determining market demand for buying and selling properties
Generator for fluid-driven production of electric energy and a method of making the generator
Semiconductor transistors with expanded top portions of gates
Computerized system and method for advanced network content processing
Engine, system and method of providing third party business valuation and associated services