Andritz Oy

Ronny Geiger

Kari Peltonen

Vesa Kaipainen

Auvo Kettunen

Petri Tarjavuori

Marco Andrade

Viridiane Vianna

An arrangement and a method for controlling a gas flow separated from a suspension of medium consistency pulp. The pulp is treated in a pulp treatment apparatus including a first pump and a second pump, wherein the second pump is a degassing centrifugal pump provided with a degassing system including a degassing conduit in which a degassing valve is arranged for regulating a pressure difference between an inlet of the second pump and the degassing conduit. The degassing system further includes a pressurized degassing vessel working under overpressure and having an inlet and an outlet, wherein the outlet of the vessel is connected to a pressure control valve for maintaining a desired overpressure in the vessel.

Arrangement and method for degassing a pump

A method for feeding a slurry of chips and liquid to a prehydrolysis reactor in the production of dissolving pulp. The slurry is pumped by using at least one pump to the reactor, and alkali is fed into the at least one pumpfor adjusting the pH of the slurry to a range of 7-10.

Method of feeding wood chips to a prehydrolysis reactor

Growing community of inventors

Curitiba, Brazil

Ronny Geiger