Metso Automation Oy

Valmet Automation Oy

Ye, Chun

Saren, Matti-paavo

Vilenius, Ari

Matti-Paavo Sarén

Arvo Rahikkala

Sami Saarenmaa

Marko Heikkinen

Ari Vilenius

Chun Ye

A measuring part measures the amount of matter dispersed in a suspension on the basis of a measurement, in which electromagnetic radiation interacts with the suspension, and the proportional volume of a free gas contained in the suspension on the basis of a measurement of electrical conductivity and/or impedance distribution for determining the amount of dispersed solid matter in the suspension.

Measurement of amount of solid in suspension

Properties of an end product, such as paper, paperboard or board, are important for the user of the end product. To be able to manufacture an end product of desired quality, it is important to know what kind of paper pulp used for manufacturing the end product results in a particular kind of property of the end product. Embodiments provide a method and an apparatus for generating a model, which model connects at least one property of the end product with at least one property of the paper pulp. On the basis of the model, also the manufacturing process can be controlled.

Modelling of a property of paper, paperboard or board

A measurement device measures a liquid flow discharged from a funnel in a lower branch and/or a side branch. A modelling function is established between liquid flows received with the funnel and/or liquid flows discharged through the lower branch and/or the side branch. In drainability measurement, a sensor measures the flow through a wire out of a measurement chamber at least at two points in time. A processor establishes a parameter descriptive of the drainability from flows measured at the different points in time based on a modelling function stored in a memory.

Drainability measurement

Growing community of inventors

Kajaani, Finland

Matti-Paavo Sarén