公开(公告)号：US11993895B2

公开(公告)日：2024-05-28

申请号：US17282451

申请日：2019-10-02

申请人： ANDRITZ OY

发明人： Marco Andrade ,  Ronny Geiger ,  Vesa Kaipainen ,  Auvo Kettunen ,  Petri Tarjavuori ,  Viridiane Vianna

IPC分类号： D21C1/06 ,  D21C3/24 ,  D21C3/26 ,  D21C7/06

CPC分类号： D21C1/06 ,  D21C3/24 ,  D21C3/26 ,  D21C7/06

摘要： 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 pump 5 for adjusting the pH of the slurry to a range of 7-10.

公开(公告)号：US11325160B2

公开(公告)日：2022-05-10

申请号：US16641402

申请日：2018-08-31

申请人： ANDRITZ OY

发明人： Kari Peltonen ,  Janne Vehmaa ,  Vesa Kaipainen ,  Sami Siik ,  Sampsa Porkka

IPC分类号： B07B13/00 ,  D21D5/06

摘要： A separation device having a housing (10) with a feed conduit (1) and a reject conduit (2), between which conduits (1, 2) and an accept conduit (3) of the housing (10) is a rotor unit (13) having a shaft (4) transverse to the through-flow direction of the separation device, which shaft rotates discs (5) attached to the shaft (4), the outer surface and/or side surfaces of which discs are jagged, i.e. they have protrusions (6) and/or notches and/or these surfaces are substantially rough and the teeth (9) of at least two sieves (7, 8) attached to the housing (10), extend between the discs (5), the first sieve (7) being between the reject conduit (2) and the accept conduit (3) and the second sieve (8) being between the feed conduit (1) and the accept conduit (3).