Method of and an arrangement for transferring a process liquid, an industrial facility and a method of simplifying the layout of such

摘要

The present invention relates to a method of and an arrangement for transferring a process liquid from a washing and thickening device to a subsequent process stage. In accordance with an advantageous embodiment of the present invention, the method and the arrangement are applicable, for example, in transferring fibre suspensions or pulps from washing and thickening device to a subsequent process stage in pulp and paper making industry such that the dilution of pulp after a washing and thickening device is performed in a stand pipe (18) below the surface level control range.

主权项

1. A method of transferring a fiber suspension from a washing and thickening device to a subsequent process stage, the method comprising the steps of:
discharging the fiber suspension in a consistency of 20-50% from a washing and thickening device, taking the fiber suspension to a stand pipe, diluting the fiber suspension to a second consistency, i.e. to a MC-consistency, providing the stand pipe with means for measuring the surface level of the fiber suspension in the stand pipe, the measuring means having a surface level control range with an upper surface level control limit, and a lower surface level control limit for maintaining, when in use, the surface level of the fiber suspension between the upper and the lower surface level control limits, discharging the fiber suspension in the second consistency from said stand pipe by means of a pump arranged in flow communication with a discharge outlet opening provided in the stand pipe, characterized by the further step of providing the fiber suspension in the surface level control range in the stand pipe with an average consistency, i.e. a third consistency, the third consistency being at least 1.5 times the second consistency.