Lorentzen & Wettre has introduced a new drainage sensor – L&W FSD Sensor. L&W FSD Sensor measures the amount of water at any desired position in the forming section. The measurement results make it possible to gain control of drainage and monitor that important properties as fibre orientation, formation, ply bonding and distribution of fine particles are correct
L&W FSD Sensor measures the amount of water at any desired position in the forming section. The measurement results make it possible to gain control of drainage and monitor that important properties as fibre orientation, formation, ply bonding and distribution of fine particles are correct.
With L&W FSD Sensor (Forming Section Drainage sensor) it is possible to optimize the wet end chemistry of the stock, which will enable better runnability and increased paper quality.
Field of application L&W FSD Sensor is used for single point measurements on forming fabrics between step foils or vacuum boxes. It is common to measure before the couch roll to be able to estimate moisture content in the paper before it leaves the wire. In multi-layer Fourdrinier machines all layers are easily monitored thanks to the possibility to apply the instrument to each layer, providing a better overall picture to improve multiple ply bonding.
The instrument allows control of foils adjustments, vacuum, refining and the use of retention chemicals.
The main advantages of controlling drainage is reduced energy consumption, reduced number of web breaks, reduced emissions, reduced usage of chemicals and reduced wear and maintenance. These are benefits that lead to lower costs, better runnability and increased paper quality. Another benefit with L&W FSD Sensor is that it uses high frequency technology instead of radioactivity and therefore requires no special permit to be used.
