ANORDNING FOR METNING AV FILTRERINGSEGENSKAPERNA HOS PAPPERSMASSA

摘要

Filtering property of paper pulp is measured by the height of a filtrate column by periodically immersing a vessel having a filter bottom into the pulp. The device for measuring filtering properties of paper pulp with the aid of the vessel having the filter bottom, has a pneumatic system that immerses the vessel with the filter bottom into or removes it from the pulp at a certain time interval, and also a follow-up system for recording the result of each measurement of the filtrate level in the vessel by the magnitude of the hydrostatic pressure as measured by a bubbler. The device for measuring the filtering property of paper pulp is characterized in that the vessel with the filter bottom consists of two communicating compartments having unequal cross section areas, the bubbler being installed in the smaller compartment. The device ensures high accuracy of measurement of the filtering property of paper pulp in the course of time, that makes it possible to utilize the proposed device in a system for automatic control of the pulp grinding process.